gradient-drag.cpp revision f200d31b8a03050faa7243929bbd5698db488399
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define __GRADIENT_DRAG_C__
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm/*
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm * On-canvas gradient dragging
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm *
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm * Authors:
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm * bulia byak <buliabyak@users.sf.net>
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm *
fefed98e624e5b375661d137181340caa08440e3johanengelen * Copyright (C) 2007 Johan Engelen
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm * Copyright (C) 2005 Authors
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm *
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm * Released under GNU GPL, read the file 'COPYING' for more information
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm */
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#ifdef HAVE_CONFIG_H
64caa91f2899a6648503a75dc7310841955b74fdJucaBlues#include "config.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#endif
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include <glibmm/i18n.h>
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen#include <cstring>
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen#include <string>
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen
d90df4b5134fecb1e7248afbf601bae9d55682c6johanengelen#include "desktop-handles.h"
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen#include "selection.h"
d90df4b5134fecb1e7248afbf601bae9d55682c6johanengelen#include "desktop.h"
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen#include "desktop-style.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "document.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "display/sp-ctrlline.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "display/sp-canvas-util.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "xml/repr.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "svg/css-ostringstream.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "svg/svg.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "libnr/nr-point-fns.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "preferences.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "sp-item.h"
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen#include "style.h"
0b8c1be8fec73b0ce317e9afa5ca6aa35a3b2545johanengelen#include "knot.h"
0b8c1be8fec73b0ce317e9afa5ca6aa35a3b2545johanengelen#include "sp-linear-gradient.h"
0b8c1be8fec73b0ce317e9afa5ca6aa35a3b2545johanengelen#include "sp-radial-gradient.h"
0b8c1be8fec73b0ce317e9afa5ca6aa35a3b2545johanengelen#include "gradient-chemistry.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "gradient-drag.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "sp-stop.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "snap.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "sp-namedview.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#include "selection-chemistry.h"
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define GR_KNOT_COLOR_NORMAL 0xffffff00
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define GR_KNOT_COLOR_MOUSEOVER 0xff000000
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define GR_KNOT_COLOR_SELECTED 0x0000ff00
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define GR_LINE_COLOR_FILL 0x0000ff7f
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define GR_LINE_COLOR_STROKE 0x9999007f
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm// screen pixels between knots when they snap:
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define SNAP_DIST 5
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm// absolute distance between gradient points for them to become a single dragger when the drag is created:
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm#define MERGE_DIST 0.1
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm// knot shapes corresponding to GrPointType enum
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmSPKnotShapeType gr_knot_shapes [] = {
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm};
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmconst gchar *gr_knot_descr [] = {
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm N_("Linear gradient <b>end</b>"),
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm N_("Linear gradient <b>mid stop</b>"),
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm N_("Radial gradient <b>center</b>"),
c0cd5511d3b975ebe07d019c1f5528108725e438johanengelen N_("Radial gradient <b>radius</b>"),
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm N_("Radial gradient <b>radius</b>"),
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen N_("Radial gradient <b>mid stop</b>"),
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen N_("Radial gradient <b>mid stop</b>")
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen};
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen
7073d105e612f7dc898c292742bee9655d2a51b2johanengelenstatic void
7073d105e612f7dc898c292742bee9655d2a51b2johanengelengr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen{
d90df4b5134fecb1e7248afbf601bae9d55682c6johanengelen GrDrag *drag = (GrDrag *) data;
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen drag->updateDraggers ();
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen drag->updateLines ();
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen drag->updateLevels ();
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen}
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen
7073d105e612f7dc898c292742bee9655d2a51b2johanengelenstatic void
7073d105e612f7dc898c292742bee9655d2a51b2johanengelengr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen{
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen GrDrag *drag = (GrDrag *) data;
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm if (drag->local_change) {
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen drag->local_change = false;
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen } else {
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen drag->updateDraggers ();
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen }
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm drag->updateLines ();
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen drag->updateLevels ();
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen}
7073d105e612f7dc898c292742bee9655d2a51b2johanengelen
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm/**
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmWhen a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmskip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmany.
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm*/
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmint
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmgr_drag_style_query (SPStyle *style, int property, gpointer data)
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm{
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen GrDrag *drag = (GrDrag *) data;
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen return QUERY_STYLE_NOTHING;
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen }
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen if (!drag->selected) {
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen return QUERY_STYLE_NOTHING;
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen } else {
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen int ret = QUERY_STYLE_NOTHING;
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen float cf[4];
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen cf[0] = cf[1] = cf[2] = cf[3] = 0;
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen int count = 0;
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen GrDragger *d = (GrDragger *) i->data;
fefed98e624e5b375661d137181340caa08440e3johanengelen for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
fefed98e624e5b375661d137181340caa08440e3johanengelen GrDraggable *draggable = (GrDraggable *) j->data;
fefed98e624e5b375661d137181340caa08440e3johanengelen
fefed98e624e5b375661d137181340caa08440e3johanengelen if (ret == QUERY_STYLE_NOTHING) {
fefed98e624e5b375661d137181340caa08440e3johanengelen ret = QUERY_STYLE_SINGLE;
fefed98e624e5b375661d137181340caa08440e3johanengelen } else if (ret == QUERY_STYLE_SINGLE) {
fefed98e624e5b375661d137181340caa08440e3johanengelen ret = QUERY_STYLE_MULTIPLE_AVERAGED;
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen }
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen cf[0] += SP_RGBA32_R_F (c);
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen cf[1] += SP_RGBA32_G_F (c);
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen cf[2] += SP_RGBA32_B_F (c);
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen cf[3] += SP_RGBA32_A_F (c);
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen count ++;
0903335a0099bd7ee779925f43a15a2216a0e863johanengelen }
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm }
fefed98e624e5b375661d137181340caa08440e3johanengelen
fefed98e624e5b375661d137181340caa08440e3johanengelen if (count) {
fefed98e624e5b375661d137181340caa08440e3johanengelen cf[0] /= count;
fefed98e624e5b375661d137181340caa08440e3johanengelen cf[1] /= count;
fefed98e624e5b375661d137181340caa08440e3johanengelen cf[2] /= count;
fefed98e624e5b375661d137181340caa08440e3johanengelen cf[3] /= count;
fefed98e624e5b375661d137181340caa08440e3johanengelen
fefed98e624e5b375661d137181340caa08440e3johanengelen // set both fill and stroke with our stop-color and stop-opacity
fefed98e624e5b375661d137181340caa08440e3johanengelen style->fill.clear();
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->fill.setColor( cf[0], cf[1], cf[2] );
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->fill.set = TRUE;
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->stroke.clear();
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->stroke.setColor( cf[0], cf[1], cf[2] );
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->stroke.set = TRUE;
d90df4b5134fecb1e7248afbf601bae9d55682c6johanengelen
d90df4b5134fecb1e7248afbf601bae9d55682c6johanengelen style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
d431763a9ec8059aa4962688de8144319969fb0fjohanengelen style->fill_opacity.set = TRUE;
d90df4b5134fecb1e7248afbf601bae9d55682c6johanengelen style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->stroke_opacity.set = TRUE;
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm style->opacity.set = TRUE;
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm }
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm return ret;
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm }
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm}
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmbool
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrmgr_drag_style_set (const SPCSSAttr *css, gpointer data)
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm{
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm GrDrag *drag = (GrDrag *) data;
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm if (!drag->selected)
f07bfd5a05d43a6d11f7cd442f085149092dea88pjrm return false;
SPCSSAttr *stop = sp_repr_css_attr_new ();
// See if the css contains interesting properties, and if so, translate them into the format
// acceptable for gradient stops
// any of color properties, in order of increasing priority:
if (css->attribute("flood-color"))
sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
if (css->attribute("lighting-color"))
sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
if (css->attribute("color"))
sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none"))
sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
if (css->attribute("fill") && strcmp(css->attribute("fill"), "none"))
sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
if (css->attribute("stop-color"))
sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity"));
} else { // multiply all opacity properties:
gdouble accumulated = 1.0;
accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
Inkscape::CSSOStringStream os;
os << accumulated;
sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str());
if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
(css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none")))
sp_repr_css_set_property (stop, "stop-opacity", "0"); // if a single fill/stroke property is set to none, don't change color, set opacity to 0
}
if (!stop->attributeList()) { // nothing for us here, pass it on
sp_repr_css_attr_unref(stop);
return false;
}
for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers
GrDragger* dragger = (GrDragger*) sel->data;
for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
GrDraggable *draggable = (GrDraggable *) i->data;
drag->local_change = true;
sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
}
}
//sp_repr_css_print(stop);
sp_repr_css_attr_unref(stop);
return true;
}
guint32 GrDrag::getColor()
{
if (!selected) return 0;
float cf[4];
cf[0] = cf[1] = cf[2] = cf[3] = 0;
int count = 0;
for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
GrDragger *d = (GrDragger *) i->data;
for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
GrDraggable *draggable = (GrDraggable *) j->data;
guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
cf[0] += SP_RGBA32_R_F (c);
cf[1] += SP_RGBA32_G_F (c);
cf[2] += SP_RGBA32_B_F (c);
cf[3] += SP_RGBA32_A_F (c);
count ++;
}
}
if (count) {
cf[0] /= count;
cf[1] /= count;
cf[2] /= count;
cf[3] /= count;
}
return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
}
SPStop *
GrDrag::addStopNearPoint (SPItem *item, Geom::Point mouse_p, double tolerance)
{
gfloat offset; // type of SPStop.offset = gfloat
SPGradient *gradient;
bool fill_or_stroke = true;
bool r1_knot = false;
bool addknot = false;
do {
gradient = sp_item_gradient (item, fill_or_stroke);
if (SP_IS_LINEARGRADIENT(gradient)) {
Geom::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
Geom::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
double dist_screen = Geom::L2 (mouse_p - nearest);
if ( dist_screen < tolerance ) {
// add the knot
offset = get_offset_between_points(nearest, begin, end);
addknot = true;
break; // break out of the while loop: add only one knot
}
} else if (SP_IS_RADIALGRADIENT(gradient)) {
Geom::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
Geom::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
double dist_screen = Geom::L2 (mouse_p - nearest);
if ( dist_screen < tolerance ) {
offset = get_offset_between_points(nearest, begin, end);
addknot = true;
r1_knot = true;
break; // break out of the while loop: add only one knot
}
end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
dist_screen = Geom::L2 (mouse_p - nearest);
if ( dist_screen < tolerance ) {
offset = get_offset_between_points(nearest, begin, end);
addknot = true;
r1_knot = false;
break; // break out of the while loop: add only one knot
}
}
fill_or_stroke = !fill_or_stroke;
} while (!fill_or_stroke && !addknot) ;
if (addknot) {
SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
SPStop* prev_stop = sp_first_stop(vector);
SPStop* next_stop = sp_next_stop(prev_stop);
guint i = 1;
while ( (next_stop) && (next_stop->offset < offset) ) {
prev_stop = next_stop;
next_stop = sp_next_stop(next_stop);
i++;
}
if (!next_stop) {
// logical error: the endstop should have offset 1 and should always be more than this offset here
return NULL;
}
SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
sp_gradient_ensure_vector (gradient);
updateDraggers();
return newstop;
}
return NULL;
}
bool
GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
{
// first, see if we can drop onto one of the existing draggers
for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
GrDragger *d = (GrDragger *) i->data;
if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
SPCSSAttr *stop = sp_repr_css_attr_new ();
sp_repr_css_set_property (stop, "stop-color", c);
sp_repr_css_set_property (stop, "stop-opacity", "1");
for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
GrDraggable *draggable = (GrDraggable *) j->data;
local_change = true;
sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
}
sp_repr_css_attr_unref(stop);
return true;
}
}
// now see if we're over line and create a new stop
bool over_line = false;
SPCtrlLine *line = NULL;
if (lines) {
for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
line = (SPCtrlLine*) l->data;
Geom::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
double dist_screen = Geom::L2 (p - nearest) * desktop->current_zoom();
if (line->item && dist_screen < 5) {
SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
if (stop) {
SPCSSAttr *css = sp_repr_css_attr_new ();
sp_repr_css_set_property (css, "stop-color", c);
sp_repr_css_set_property (css, "stop-opacity", "1");
sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
return true;
}
}
}
}
return false;
}
GrDrag::GrDrag(SPDesktop *desktop) {
this->desktop = desktop;
this->selection = sp_desktop_selection(desktop);
this->draggers = NULL;
this->lines = NULL;
this->selected = NULL;
this->hor_levels.clear();
this->vert_levels.clear();
this->local_change = false;
this->sel_changed_connection = this->selection->connectChanged(
sigc::bind (
sigc::ptr_fun(&gr_drag_sel_changed),
(gpointer)this )
);
this->sel_modified_connection = this->selection->connectModified(
sigc::bind(
sigc::ptr_fun(&gr_drag_sel_modified),
(gpointer)this )
);
this->style_set_connection = this->desktop->connectSetStyle(
sigc::bind(
sigc::ptr_fun(&gr_drag_style_set),
(gpointer)this )
);
this->style_query_connection = this->desktop->connectQueryStyle(
sigc::bind(
sigc::ptr_fun(&gr_drag_style_query),
(gpointer)this )
);
this->updateDraggers ();
this->updateLines ();
this->updateLevels ();
if (desktop->gr_item) {
this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
}
}
GrDrag::~GrDrag()
{
this->sel_changed_connection.disconnect();
this->sel_modified_connection.disconnect();
this->style_set_connection.disconnect();
this->style_query_connection.disconnect();
if (this->selected) {
GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
desktop->gr_item = draggable->item;
desktop->gr_point_type = draggable->point_type;
desktop->gr_point_i = draggable->point_i;
desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
} else {
desktop->gr_item = NULL;
desktop->gr_point_type = 0;
desktop->gr_point_i = 0;
desktop->gr_fill_or_stroke = true;
}
deselect_all();
for (GList *l = this->draggers; l != NULL; l = l->next) {
delete ((GrDragger *) l->data);
}
g_list_free (this->draggers);
this->draggers = NULL;
this->selected = NULL;
for (GSList *l = this->lines; l != NULL; l = l->next) {
gtk_object_destroy( GTK_OBJECT (l->data));
}
g_slist_free (this->lines);
this->lines = NULL;
}
GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
{
this->item = item;
this->point_type = point_type;
this->point_i = point_i;
this->fill_or_stroke = fill_or_stroke;
g_object_ref (G_OBJECT (this->item));
}
GrDraggable::~GrDraggable ()
{
g_object_unref (G_OBJECT (this->item));
}
SPObject *
GrDraggable::getServer ()
{
if (!item)
return NULL;
SPObject *server = NULL;
if (fill_or_stroke)
server = SP_OBJECT_STYLE_FILL_SERVER (item);
else
server = SP_OBJECT_STYLE_STROKE_SERVER (item);
return server;
}
static
boost::optional<Geom::Point>
get_snap_vector (Geom::Point p, Geom::Point o, double snap, double initial)
{
double r = L2 (p - o);
if (r < 1e-3) {
return boost::optional<Geom::Point>();
}
double angle = atan2 (p - o);
// snap angle to snaps increments, starting from initial:
double a_snapped = initial + floor((angle - initial)/snap + 0.5) * snap;
// calculate the new position and subtract p to get the vector:
return (o + r * Geom::Point(cos(a_snapped), sin(a_snapped)) - p);
}
static void
gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
{
GrDragger *dragger = (GrDragger *) data;
GrDrag *drag = dragger->parent;
Geom::Point p = ppointer;
SPDesktop *desktop = dragger->parent->desktop;
SnapManager &m = desktop->namedview->snap_manager;
double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
if (state & GDK_SHIFT_MASK) {
// with Shift; unsnap if we carry more than one draggable
if (dragger->draggables && dragger->draggables->next) {
// create a new dragger
GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
// relink to it all but the first draggable in the list
for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
dr_new->addDraggable (draggable);
}
dr_new->updateKnotShape();
g_slist_free (dragger->draggables->next);
dragger->draggables->next = NULL;
dragger->updateKnotShape();
dragger->updateTip();
}
} else if (!(state & GDK_CONTROL_MASK)) {
// without Shift or Ctrl; see if we need to snap to another dragger
for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
GrDragger *d_new = (GrDragger *) di->data;
if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
// Merge draggers:
for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
GrDraggable *draggable = (GrDraggable *) i->data;
// copy draggable to d_new:
GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
d_new->addDraggable (da_new);
}
// unlink and delete this dragger
dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
delete dragger;
// update the new merged dragger
d_new->fireDraggables(true, false, true);
d_new->parent->updateLines();
d_new->parent->setSelected (d_new);
d_new->updateKnotShape ();
d_new->updateTip ();
d_new->updateDependencies(true);
sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
_("Merge gradient handles"));
return;
}
}
}
m.setup(desktop);
if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
if (s.getSnapped()) {
p = s.getPoint();
sp_knot_moveto (knot, p);
}
} else if (state & GDK_CONTROL_MASK) {
SnappedConstraints sc;
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
/* 0 means no snapping. */
for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
GrDragger *d_new = (GrDragger *) di->data;
if (d_new == dragger)
continue;
if (d_new->isA (draggable->item,
draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
draggable->fill_or_stroke)) {
// found the other end of the linear gradient;
if (state & GDK_SHIFT_MASK) {
// moving linear around center
Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
dr_snap = center;
} else {
// moving linear around the other end
dr_snap = d_new->point;
}
}
}
} else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
GrDragger *d_new = (GrDragger *) di->data;
if (d_new == dragger)
continue;
if (d_new->isA (draggable->item,
POINT_RG_CENTER,
draggable->fill_or_stroke)) {
// found the center of the radial gradient;
dr_snap = d_new->point;
}
}
} else if (draggable->point_type == POINT_RG_CENTER) {
// radial center snaps to hor/vert relative to its original position
dr_snap = dragger->point_original;
}
boost::optional<Geom::Point> snap_vector;
if (dr_snap.isFinite()) {
if (state & GDK_MOD1_MASK) {
// with Alt, snap to the original angle and its perpendiculars
snap_vector = get_snap_vector (p, dr_snap, M_PI/2, Geom::atan2 (dragger->point_original - dr_snap));
} else {
// with Ctrl, snap to M_PI/snaps
snap_vector = get_snap_vector (p, dr_snap, M_PI/snaps, 0);
}
if (snap_vector) {
Inkscape::Snapper::ConstraintLine cl(dr_snap, p + *snap_vector - dr_snap);
Inkscape::SnappedPoint s = m.constrainedSnap(Inkscape::SnapCandidatePoint(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE), cl);
if (s.getSnapped()) {
s.setTransformation(s.getPoint() - p);
sc.points.push_back(s);
} else {
Inkscape::SnappedPoint dummy(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE, 0, Inkscape::SNAPTARGET_CONSTRAINED_ANGLE, Geom::L2(*snap_vector), 10000, true, false);
dummy.setTransformation(*snap_vector);
sc.points.push_back(dummy);
}
}
}
}
Inkscape::SnappedPoint bsp = m.findBestSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE), sc, true); // snap indicator will be displayed if needed
if (bsp.getSnapped()) {
p += bsp.getTransformation();
sp_knot_moveto (knot, p);
}
}
drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
if (drag->keep_selection) {
Geom::Point diff = p - dragger->point;
drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
} else {
dragger->point = p;
dragger->fireDraggables (false, scale_radial);
dragger->updateDependencies(false);
}
}
static void
gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, GSList **moving)
{
GrDrag *drag = dragger->parent;
// a midpoint dragger can (logically) only contain one GrDraggable
GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
// get begin and end points between which dragging is allowed:
// the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
*moving = g_slist_append(*moving, dragger);
guint lowest_i = draggable->point_i;
guint highest_i = draggable->point_i;
GrDragger *lowest_dragger = dragger;
GrDragger *highest_dragger = dragger;
if (dragger->isSelected()) {
GrDragger* d_add;
while ( true )
{
d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
if ( d_add && g_list_find(drag->selected, d_add) ) {
lowest_i = lowest_i - 1;
*moving = g_slist_prepend(*moving, d_add);
lowest_dragger = d_add;
} else {
break;
}
}
while ( true )
{
d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
if ( d_add && g_list_find(drag->selected, d_add) ) {
highest_i = highest_i + 1;
*moving = g_slist_append(*moving, d_add);
highest_dragger = d_add;
} else {
break;
}
}
}
if ( SP_IS_LINEARGRADIENT(server) ) {
guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
GrDragger *d_temp;
if (lowest_i == 1) {
d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
} else {
d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
}
if (d_temp)
*begin = d_temp->point;
d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
if (d_temp == NULL) {
d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
}
if (d_temp)
*end = d_temp->point;
} else if ( SP_IS_RADIALGRADIENT(server) ) {
guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
GrDragger *d_temp;
if (lowest_i == 1) {
d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
} else {
d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
}
if (d_temp)
*begin = d_temp->point;
d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
if (d_temp == NULL) {
d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
}
if (d_temp)
*end = d_temp->point;
}
*low_lim = dragger->point - (lowest_dragger->point - *begin);
*high_lim = dragger->point - (highest_dragger->point - *end);
}
/**
Called when a midpoint knot is dragged.
*/
static void
gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
{
GrDragger *dragger = (GrDragger *) data;
GrDrag *drag = dragger->parent;
// a midpoint dragger can (logically) only contain one GrDraggable
GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
// FIXME: take from prefs
double snap_fraction = 0.1;
Geom::Point p = ppointer;
Geom::Point begin(0,0), end(0,0);
Geom::Point low_lim(0,0), high_lim(0,0);
SPObject *server = draggable->getServer();
GSList *moving = NULL;
gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
if (state & GDK_CONTROL_MASK) {
p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
} else {
p = snap_vector_midpoint (p, low_lim, high_lim, 0);
}
Geom::Point displacement = p - dragger->point;
for (GSList const* i = moving; i != NULL; i = i->next) {
GrDragger *drg = (GrDragger*) i->data;
SPKnot *drgknot = drg->knot;
Geom::Point this_move = displacement;
if (state & GDK_MOD1_MASK) {
// FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
double alpha = 1.0;
if (Geom::L2(drg->point - dragger->point) + Geom::L2(drg->point - begin) - 1e-3 > Geom::L2(dragger->point - begin)) { // drg is on the end side from dragger
double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
} else { // drg is on the begin side from dragger
double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
}
}
drg->point += this_move;
sp_knot_moveto (drgknot, drg->point);
drg->fireDraggables (false);
drg->updateDependencies(false);
}
g_slist_free(moving);
drag->keep_selection = dragger->isSelected();
}
static void
gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
{
GrDragger *dragger = (GrDragger *) data;
sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
}
/**
Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
*/
static void
gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
{
GrDragger *dragger = (GrDragger *) data;
sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
dragger->point_original = dragger->point = knot->pos;
if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
dragger->fireDraggables (true, true);
} else {
dragger->fireDraggables (true);
}
for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
GrDragger *d = (GrDragger *) i->data;
if (d == dragger)
continue;
d->fireDraggables (true);
}
// make this dragger selected
if (!dragger->parent->keep_selection) {
dragger->parent->setSelected (dragger);
}
dragger->parent->keep_selection = false;
dragger->updateDependencies(true);
// we did an undoable action
sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
_("Move gradient handle"));
}
/**
Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
state of the keyboard keys
*/
static void
gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
{
GrDragger *dragger = (GrDragger *) data;
GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
if (!draggable) return;
if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
// delete this knot from vector
SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
gradient = sp_gradient_get_vector (gradient, false);
if (gradient->vector.stops.size() > 2) { // 2 is the minimum
SPStop *stop = NULL;
switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
case POINT_LG_BEGIN:
case POINT_RG_CENTER:
stop = sp_first_stop(gradient);
{
SPStop *next = sp_next_stop (stop);
if (next) {
next->offset = 0;
sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
}
}
break;
case POINT_LG_END:
case POINT_RG_R1:
case POINT_RG_R2:
stop = sp_last_stop(gradient);
{
SPStop *prev = sp_prev_stop (stop, gradient);
if (prev) {
prev->offset = 1;
sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
}
}
break;
case POINT_LG_MID:
case POINT_RG_MID1:
case POINT_RG_MID2:
stop = sp_get_stop_i(gradient, draggable->point_i);
break;
}
SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
_("Delete gradient stop"));
}
} else {
// select the dragger
dragger->point_original = dragger->point;
if ( state & GDK_SHIFT_MASK ) {
dragger->parent->setSelected (dragger, true, false);
} else {
dragger->parent->setSelected (dragger);
}
}
}
/**
Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
*/
static void
gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
{
GrDragger *dragger = (GrDragger *) data;
dragger->point_original = dragger->point;
if (dragger->draggables == NULL)
return;
GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
}
/**
Act upon all draggables of the dragger, setting them to the dragger's point
*/
void
GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
{
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
// set local_change flag so that selection_changed callback does not regenerate draggers
this->parent->local_change = true;
// change gradient, optionally writing to repr; prevent focus from moving if it's snapped
// to the center, unless it's the first update upon merge when we must snap it to the point
if (merging_focus ||
!(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
{
sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
}
}
}
/**
Checks if the dragger has a draggable with this point_type
*/
bool
GrDragger::isA (gint point_type)
{
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
if (draggable->point_type == point_type) {
return true;
}
}
return false;
}
/**
Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
*/
bool
GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
{
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
return true;
}
}
return false;
}
/**
Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
*/
bool
GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
{
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
return true;
}
}
return false;
}
bool
GrDraggable::mayMerge (GrDraggable *da2)
{
if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
// we must not merge the points of the same gradient!
if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
(this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
// except that we can snap center and focus together
return false;
}
}
// disable merging of midpoints.
if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
|| (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
|| (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
return false;
return true;
}
bool
GrDragger::mayMerge (GrDragger *other)
{
if (this == other)
return false;
for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
GrDraggable *da1 = (GrDraggable *) i->data;
for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
GrDraggable *da2 = (GrDraggable *) j->data;
if (!da1->mayMerge(da2))
return false;
}
}
return true;
}
bool
GrDragger::mayMerge (GrDraggable *da2)
{
for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
GrDraggable *da1 = (GrDraggable *) i->data;
if (!da1->mayMerge(da2))
return false;
}
return true;
}
/**
Updates the statusbar tip of the dragger knot, based on its draggables
*/
void
GrDragger::updateTip ()
{
if (this->knot && this->knot->tip) {
g_free (this->knot->tip);
this->knot->tip = NULL;
}
if (g_slist_length (this->draggables) == 1) {
GrDraggable *draggable = (GrDraggable *) this->draggables->data;
char *item_desc = sp_item_description(draggable->item);
switch (draggable->point_type) {
case POINT_LG_MID:
case POINT_RG_MID1:
case POINT_RG_MID2:
this->knot->tip = g_strdup_printf (_("%s %d for: %s%s; drag with <b>Ctrl</b> to snap offset; click with <b>Ctrl+Alt</b> to delete stop"),
_(gr_knot_descr[draggable->point_type]),
draggable->point_i,
item_desc,
draggable->fill_or_stroke == false ? _(" (stroke)") : "");
break;
default:
this->knot->tip = g_strdup_printf (_("%s for: %s%s; drag with <b>Ctrl</b> to snap angle, with <b>Ctrl+Alt</b> to preserve angle, with <b>Ctrl+Shift</b> to scale around center"),
_(gr_knot_descr[draggable->point_type]),
item_desc,
draggable->fill_or_stroke == false ? _(" (stroke)") : "");
break;
}
g_free(item_desc);
} else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
} else {
int length = g_slist_length (this->draggables);
this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
"Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
length),
length);
}
}
/**
Adds a draggable to the dragger
*/
void
GrDragger::updateKnotShape ()
{
if (!draggables)
return;
GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
}
/**
Adds a draggable to the dragger
*/
void
GrDragger::addDraggable (GrDraggable *draggable)
{
this->draggables = g_slist_prepend (this->draggables, draggable);
this->updateTip();
}
/**
Moves this dragger to the point of the given draggable, acting upon all other draggables
*/
void
GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
{
this->point = sp_item_gradient_get_coords (item, point_type, point_i, fill_or_stroke);
this->point_original = this->point;
sp_knot_moveto (this->knot, this->point);
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
GrDraggable *da = (GrDraggable *) i->data;
if ( (da->item == item) &&
(point_type == -1 || da->point_type == point_type) &&
(point_i == -1 || da->point_i == point_i) &&
(da->fill_or_stroke == fill_or_stroke) ) {
continue;
}
sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
}
// FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
}
/**
Moves all midstop draggables that depend on this one
*/
void
GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
SPObject *server = draggable->getServer();
if (!server)
return;
guint num = SP_GRADIENT(server)->vector.stops.size();
if (num <= 2) return;
if ( SP_IS_LINEARGRADIENT(server) ) {
for ( guint i = 1; i < num - 1; i++ ) {
this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
}
} else if ( SP_IS_RADIALGRADIENT(server) ) {
for ( guint i = 1; i < num - 1; i++ ) {
this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
}
}
}
/**
Moves all draggables that depend on this one
*/
void
GrDragger::updateDependencies (bool write_repr)
{
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
switch (draggable->point_type) {
case POINT_LG_BEGIN:
{
// the end point is dependent only when dragging with ctrl+shift
this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
this->updateMidstopDependencies (draggable, write_repr);
}
break;
case POINT_LG_END:
{
// the begin point is dependent only when dragging with ctrl+shift
this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
this->updateMidstopDependencies (draggable, write_repr);
}
break;
case POINT_LG_MID:
// no other nodes depend on mid points.
break;
case POINT_RG_R2:
this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
this->updateMidstopDependencies (draggable, write_repr);
break;
case POINT_RG_R1:
this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
this->updateMidstopDependencies (draggable, write_repr);
break;
case POINT_RG_CENTER:
this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
this->updateMidstopDependencies (draggable, write_repr);
break;
case POINT_RG_FOCUS:
// nothing can depend on that
break;
case POINT_RG_MID1:
this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
break;
case POINT_RG_MID2:
this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
break;
default:
break;
}
}
}
GrDragger::GrDragger (GrDrag *parent, Geom::Point p, GrDraggable *draggable)
: point(p),
point_original(p)
{
this->draggables = NULL;
this->parent = parent;
// create the knot
this->knot = sp_knot_new (parent->desktop, NULL);
this->knot->setMode(SP_KNOT_MODE_XOR);
this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
sp_knot_update_ctrl(this->knot);
// move knot to the given point
sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
sp_knot_show (this->knot);
// connect knot's signals
if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
// luckily, midstops never snap to other nodes so are never unsnapped...
&& ( (draggable->point_type == POINT_LG_MID)
|| (draggable->point_type == POINT_RG_MID1)
|| (draggable->point_type == POINT_RG_MID2) ) )
{
this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
} else {
this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
}
g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
// add the initial draggable
if (draggable)
this->addDraggable (draggable);
updateKnotShape();
}
GrDragger::~GrDragger ()
{
// unselect if it was selected
this->parent->setDeselected(this);
// disconnect signals
g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
/* unref should call destroy */
g_object_unref (G_OBJECT (this->knot));
// delete all draggables
for (GSList const* i = this->draggables; i != NULL; i = i->next) {
delete ((GrDraggable *) i->data);
}
g_slist_free (this->draggables);
this->draggables = NULL;
}
/**
Select the dragger which has the given draggable.
*/
GrDragger *
GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
{
for (GList const* i = this->draggers; i != NULL; i = i->next) {
GrDragger *dragger = (GrDragger *) i->data;
for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
GrDraggable *da2 = (GrDraggable *) j->data;
if ( (da2->item == item) &&
(point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
(point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
(da2->fill_or_stroke == fill_or_stroke)) {
return (dragger);
}
}
}
return NULL;
}
void
GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
{
GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
if (d && d != this) {
d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
}
}
/**
Draw this dragger as selected
*/
void
GrDragger::select()
{
this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
}
/**
Draw this dragger as normal (deselected)
*/
void
GrDragger::deselect()
{
this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
}
bool
GrDragger::isSelected()
{
return g_list_find (parent->selected, this);
}
/**
\brief Deselect all stops/draggers (private)
*/
void
GrDrag::deselect_all()
{
while (selected) {
( (GrDragger*) selected->data)->deselect();
selected = g_list_remove(selected, selected->data);
}
}
/**
\brief Deselect all stops/draggers (public; emits signal)
*/
void
GrDrag::deselectAll()
{
deselect_all();
this->desktop->emitToolSubselectionChanged(NULL);
}
/**
\brief Select all stops/draggers
*/
void
GrDrag::selectAll()
{
for (GList *l = this->draggers; l != NULL; l = l->next) {
GrDragger *d = ((GrDragger *) l->data);
setSelected (d, true, true);
}
}
/**
\brief Select all stops/draggers that match the coords
*/
void
GrDrag::selectByCoords(std::vector<Geom::Point> coords)
{
for (GList *l = this->draggers; l != NULL; l = l->next) {
GrDragger *d = ((GrDragger *) l->data);
for (guint k = 0; k < coords.size(); k++) {
if (Geom::L2 (d->point - coords[k]) < 1e-4) {
setSelected (d, true, true);
}
}
}
}
/**
\brief Select all stops/draggers that fall within the rect
*/
void
GrDrag::selectRect(Geom::Rect const &r)
{
for (GList *l = this->draggers; l != NULL; l = l->next) {
GrDragger *d = ((GrDragger *) l->data);
if (r.contains(d->point)) {
setSelected (d, true, true);
}
}
}
/**
\brief Select a dragger
\param dragger The dragger to select
\param add_to_selection If true, add to selection, otherwise deselect others
\param override If true, always select this node, otherwise toggle selected status
*/
void
GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
{
GrDragger *seldragger = NULL;
if (add_to_selection) {
if (!dragger) return;
if (override) {
if (!g_list_find(selected, dragger)) {
selected = g_list_prepend(selected, dragger);
}
dragger->select();
seldragger = dragger;
} else { // toggle
if (g_list_find(selected, dragger)) {
selected = g_list_remove(selected, dragger);
dragger->deselect();
if (selected) {
seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
}
} else {
selected = g_list_prepend(selected, dragger);
dragger->select();
seldragger = dragger;
}
}
} else {
deselect_all();
if (dragger) {
selected = g_list_prepend(selected, dragger);
dragger->select();
seldragger = dragger;
}
}
if (seldragger) {
this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
}
}
/**
\brief Deselect a dragger
\param dragger The dragger to deselect
*/
void
GrDrag::setDeselected (GrDragger *dragger)
{
if (g_list_find(selected, dragger)) {
selected = g_list_remove(selected, dragger);
dragger->deselect();
}
this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
}
/**
Create a line from p1 to p2 and add it to the lines list
*/
void
GrDrag::addLine (SPItem *item, Geom::Point p1, Geom::Point p2, guint32 rgba)
{
SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
SP_TYPE_CTRLLINE, NULL);
sp_canvas_item_move_to_z(line, 0);
SP_CTRLLINE(line)->item = item;
sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
sp_canvas_item_show (line);
this->lines = g_slist_append (this->lines, line);
}
/**
If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
new dragger and add it to draggers list
*/
void
GrDrag::addDragger (GrDraggable *draggable)
{
Geom::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
for (GList *i = this->draggers; i != NULL; i = i->next) {
GrDragger *dragger = (GrDragger *) i->data;
if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
// distance is small, merge this draggable into dragger, no need to create new dragger
dragger->addDraggable (draggable);
dragger->updateKnotShape();
return;
}
}
GrDragger *new_dragger = new GrDragger(this, p, draggable);
// fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
this->draggers = g_list_append (this->draggers, new_dragger);
}
/**
Add draggers for the radial gradient rg on item
*/
void
GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
{
addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
guint num = rg->vector.stops.size();
if (num > 2) {
for ( guint i = 1; i < num - 1; i++ ) {
addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
}
}
addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
if (num > 2) {
for ( guint i = 1; i < num - 1; i++ ) {
addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
}
}
addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
}
/**
Add draggers for the linear gradient lg on item
*/
void
GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
{
addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
guint num = lg->vector.stops.size();
if (num > 2) {
for ( guint i = 1; i < num - 1; i++ ) {
addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
}
}
addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
}
/**
Artificially grab the knot of this dragger; used by the gradient context
*/
void
GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
{
if (dragger) {
sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
}
}
/**
Artificially grab the knot of the dragger with this draggable; used by the gradient context
*/
void
GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
{
GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
if (dragger) {
sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
}
}
/**
Regenerates the draggers list from the current selection; is called when selection is changed or
modified, also when a radial dragger needs to update positions of other draggers in the gradient
*/
void
GrDrag::updateDraggers ()
{
while (selected) {
selected = g_list_remove(selected, selected->data);
}
// delete old draggers
for (GList const* i = this->draggers; i != NULL; i = i->next) {
delete ((GrDragger *) i->data);
}
g_list_free (this->draggers);
this->draggers = NULL;
g_return_if_fail (this->selection != NULL);
for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
SPItem *item = SP_ITEM(i->data);
SPStyle *style = SP_OBJECT_STYLE (item);
if (style && (style->fill.isPaintserver())) {
SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
if (SP_IS_LINEARGRADIENT (server)) {
addDraggersLinear (SP_LINEARGRADIENT (server), item, true);
} else if (SP_IS_RADIALGRADIENT (server)) {
addDraggersRadial (SP_RADIALGRADIENT (server), item, true);
}
}
if (style && (style->stroke.isPaintserver())) {
SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
if (SP_IS_LINEARGRADIENT (server)) {
addDraggersLinear (SP_LINEARGRADIENT (server), item, false);
} else if (SP_IS_RADIALGRADIENT (server)) {
addDraggersRadial (SP_RADIALGRADIENT (server), item, false);
}
}
}
}
/**
Regenerates the lines list from the current selection; is called on each move of a dragger, so that
lines are always in sync with the actual gradient
*/
void
GrDrag::updateLines ()
{
// delete old lines
for (GSList const *i = this->lines; i != NULL; i = i->next) {
gtk_object_destroy( GTK_OBJECT (i->data));
}
g_slist_free (this->lines);
this->lines = NULL;
g_return_if_fail (this->selection != NULL);
for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
SPItem *item = SP_ITEM(i->data);
SPStyle *style = SP_OBJECT_STYLE (item);
if (style && (style->fill.isPaintserver())) {
SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
if (SP_IS_LINEARGRADIENT (server)) {
this->addLine (item, sp_item_gradient_get_coords (item, POINT_LG_BEGIN, 0, true), sp_item_gradient_get_coords (item, POINT_LG_END, 0, true), GR_LINE_COLOR_FILL);
} else if (SP_IS_RADIALGRADIENT (server)) {
Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
}
}
if (style && (style->stroke.isPaintserver())) {
SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
if (SP_IS_LINEARGRADIENT (server)) {
this->addLine (item, sp_item_gradient_get_coords (item, POINT_LG_BEGIN, 0, false), sp_item_gradient_get_coords (item, POINT_LG_END, 0, false), GR_LINE_COLOR_STROKE);
} else if (SP_IS_RADIALGRADIENT (server)) {
Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
}
}
}
}
/**
Regenerates the levels list from the current selection
*/
void
GrDrag::updateLevels ()
{
hor_levels.clear();
vert_levels.clear();
g_return_if_fail (this->selection != NULL);
for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
SPItem *item = SP_ITEM(i->data);
Geom::OptRect rect = sp_item_bbox_desktop (item);
if (rect) {
// Remember the edges of the bbox and the center axis
hor_levels.push_back(rect->min()[Geom::Y]);
hor_levels.push_back(rect->max()[Geom::Y]);
hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
vert_levels.push_back(rect->min()[Geom::X]);
vert_levels.push_back(rect->max()[Geom::X]);
vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
}
}
}
void
GrDrag::selected_reverse_vector ()
{
if (selected == NULL)
return;
for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
GrDraggable *draggable = (GrDraggable *) i->data;
sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
}
}
void
GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
{
selected_move (x, y, false, scale_radial);
}
void
GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
{
if (selected == NULL)
return;
bool did = false;
for (GList *i = selected; i != NULL; i = i->next) {
GrDragger *d = (GrDragger *) i->data;
if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
// if this is an endpoint,
// Moving an rg center moves its focus and radii as well.
// therefore, if this is a focus or radius and if selection
// contains the center as well, do not move this one
if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
(d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
bool skip_radius_with_center = false;
for (GList *di = selected; di != NULL; di = di->next) {
GrDragger *d_new = (GrDragger *) di->data;
if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
POINT_RG_CENTER,
0,
((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
// FIXME: here we take into account only the first draggable!
skip_radius_with_center = true;
}
}
if (skip_radius_with_center)
continue;
}
did = true;
d->point += Geom::Point (x, y);
d->point_original = d->point;
sp_knot_moveto (d->knot, d->point);
d->fireDraggables (write_repr, scale_radial);
d->updateDependencies(write_repr);
}
}
if (write_repr && did) {
// we did an undoable action
sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
_("Move gradient handle(s)"));
return;
}
if (!did) { // none of the end draggers are selected, so let's try to move the mids
GrDragger *dragger = (GrDragger *) selected->data;
// a midpoint dragger can (logically) only contain one GrDraggable
GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
Geom::Point begin(0,0), end(0,0);
Geom::Point low_lim(0,0), high_lim(0,0);
SPObject *server = draggable->getServer();
GSList *moving = NULL;
gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
Geom::Point p(x, y);
p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
Geom::Point displacement = p - dragger->point;
for (GSList const* i = moving; i != NULL; i = i->next) {
GrDragger *drg = (GrDragger*) i->data;
SPKnot *drgknot = drg->knot;
drg->point += displacement;
sp_knot_moveto (drgknot, drg->point);
drg->fireDraggables (true);
drg->updateDependencies(true);
did = true;
}
g_slist_free(moving);
if (write_repr && did) {
// we did an undoable action
sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
_("Move gradient mid stop(s)"));
}
}
}
void
GrDrag::selected_move_screen (double x, double y)
{
gdouble zoom = desktop->current_zoom();
gdouble zx = x / zoom;
gdouble zy = y / zoom;
selected_move (zx, zy);
}
/**
Select the knot next to the last selected one and deselect all other selected.
*/
GrDragger *
GrDrag::select_next ()
{
GrDragger *d = NULL;
if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
if (draggers)
d = (GrDragger *) draggers->data;
} else {
d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
}
if (d)
setSelected (d);
return d;
}
/**
Select the knot previous from the last selected one and deselect all other selected.
*/
GrDragger *
GrDrag::select_prev ()
{
GrDragger *d = NULL;
if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
if (draggers)
d = (GrDragger *) g_list_last (draggers)->data;
} else {
d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
}
if (d)
setSelected (d);
return d;
}
// FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
void
GrDrag::deleteSelected (bool just_one)
{
if (!selected) return;
SPDocument *document = false;
struct StructStopInfo {
SPStop * spstop;
GrDraggable * draggable;
SPGradient * gradient;
SPGradient * vector;
};
GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
GSList *endstoplist = NULL; // list of stops that must be deleted
while (selected) {
GrDragger *dragger = (GrDragger*) selected->data;
for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
GrDraggable *draggable = (GrDraggable*) drgble->data;
SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
switch (draggable->point_type) {
case POINT_LG_MID:
case POINT_RG_MID1:
case POINT_RG_MID2:
{
SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
// check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
bool present = false;
for (GSList const * l = midstoplist; l != NULL; l = l->next) {
if ( (SPStop*)l->data == stop ) {
present = true;
break; // no need to search further.
}
}
if (!present)
midstoplist = g_slist_append(midstoplist, stop);
}
break;
case POINT_LG_BEGIN:
case POINT_LG_END:
case POINT_RG_CENTER:
case POINT_RG_R1:
case POINT_RG_R2:
{
SPStop *stop = NULL;
if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
stop = sp_first_stop(vector);
} else {
stop = sp_last_stop(vector);
}
if (stop) {
StructStopInfo *stopinfo = new StructStopInfo;
stopinfo->spstop = stop;
stopinfo->draggable = draggable;
stopinfo->gradient = gradient;
stopinfo->vector = vector;
// check if already present in list. (e.g. when both R1 and R2 were selected)
bool present = false;
for (GSList const * l = endstoplist; l != NULL; l = l->next) {
if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
present = true;
break; // no need to search further.
}
}
if (!present)
endstoplist = g_slist_append(endstoplist, stopinfo);
}
}
break;
default:
break;
}
}
selected = g_list_remove(selected, dragger);
if ( just_one ) break; // iterate once if just_one is set.
}
while (midstoplist) {
SPStop *stop = (SPStop*) midstoplist->data;
document = SP_OBJECT_DOCUMENT (stop);
Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
parent->removeChild(SP_OBJECT_REPR(stop));
midstoplist = g_slist_remove(midstoplist, stop);
}
while (endstoplist) {
StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
// 2 is the minimum, cannot delete more than that without deleting the whole vector
// cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
// manually count the children, don't know if there already exists a function for this...
int len = 0;
for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
child != NULL ;
child = SP_OBJECT_NEXT(child) )
{
if ( SP_IS_STOP(child) ) len ++;
}
if (len > 2)
{
switch (stopinfo->draggable->point_type) {
case POINT_LG_BEGIN:
{
SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
SPStop *stop = sp_first_stop(stopinfo->vector);
gdouble offset = stop->offset;
Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
lg->x1.computed = newbegin[Geom::X];
lg->y1.computed = newbegin[Geom::Y];
Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
stop->offset = 0;
sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
// iterate through midstops to set new offset values such that they won't move on canvas.
SPStop *laststop = sp_last_stop(stopinfo->vector);
stop = sp_next_stop(stop);
while ( stop != laststop ) {
stop->offset = (stop->offset - offset)/(1 - offset);
sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
stop = sp_next_stop(stop);
}
}
break;
case POINT_LG_END:
{
SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
SPStop *laststop = sp_last_stop(stopinfo->vector);
gdouble offset = laststop->offset;
Geom::Point newend = begin + offset * (oldend - begin);
lg->x2.computed = newend[Geom::X];
lg->y2.computed = newend[Geom::Y];
Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
laststop->offset = 1;
sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
// iterate through midstops to set new offset values such that they won't move on canvas.
SPStop *stop = sp_first_stop(stopinfo->vector);
stop = sp_next_stop(stop);
while ( stop != laststop ) {
stop->offset = stop->offset / offset;
sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
stop = sp_next_stop(stop);
}
}
break;
case POINT_RG_CENTER:
{
SPStop *newfirst = sp_next_stop (stopinfo->spstop);
if (newfirst) {
newfirst->offset = 0;
sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
}
SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
}
break;
case POINT_RG_R1:
case POINT_RG_R2:
SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
double oldradius = rg->r.computed;
SPStop *laststop = sp_last_stop(stopinfo->vector);
gdouble offset = laststop->offset;
double newradius = offset * oldradius;
rg->r.computed = newradius;
Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
sp_repr_set_svg_double(repr, "r", rg->r.computed);
laststop->offset = 1;
sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
// iterate through midstops to set new offset values such that they won't move on canvas.
SPStop *stop = sp_first_stop(stopinfo->vector);
stop = sp_next_stop(stop);
while ( stop != laststop ) {
stop->offset = stop->offset / offset;
sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
stop = sp_next_stop(stop);
}
break;
}
}
else
{ // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
SPCSSAttr *css = sp_repr_css_attr_new ();
// stopinfo->spstop is the selected stop
Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
unselectedrepr = unselectedrepr->next();
}
if (unselectedrepr == NULL) {
if (stopinfo->draggable->fill_or_stroke) {
sp_repr_css_unset_property (css, "fill");
} else {
sp_repr_css_unset_property (css, "stroke");
}
} else {
SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
if (stopinfo->draggable->fill_or_stroke) {
sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
} else {
sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
}
sp_repr_css_attr_unref (stopcss);
}
sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
sp_repr_css_attr_unref (css);
}
endstoplist = g_slist_remove(endstoplist, stopinfo);
delete stopinfo;
}
if (document) {
sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
}
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :