#define __SP_TWEAK_CONTEXT_C__

#include "config.h"

#include <gtk/gtk.h>

#include <gdk/gdkkeysyms.h>

#include <glibmm/i18n.h>

#include <numeric>

#include "svg/svg.h"

#include "display/canvas-bpath.h"

#include "display/bezier-utils.h"

#include <glib/gmem.h>

#include "macros.h"

#include "document.h"

#include "selection.h"

#include "desktop.h"

#include "desktop-events.h"

#include "desktop-handles.h"

#include "desktop-affine.h"

#include "desktop-style.h"

#include "message-context.h"

#include "pixmaps/cursor-thin.xpm"

#include "pixmaps/cursor-thicken.xpm"

#include "pixmaps/cursor-attract.xpm"

#include "pixmaps/cursor-repel.xpm"

#include "pixmaps/cursor-push.xpm"

#include "pixmaps/cursor-roughen.xpm"

#include "pixmaps/cursor-color.xpm"

#include <boost/optional.hpp>

#include "libnr/nr-matrix-ops.h"

#include "libnr/nr-scale-translate-ops.h"

#include "xml/repr.h"

#include "context-fns.h"

#include "sp-item.h"

#include "inkscape.h"

#include "color.h"

#include "svg/svg-color.h"

#include "splivarot.h"

#include "sp-item-group.h"

#include "sp-shape.h"

#include "sp-path.h"

#include "path-chemistry.h"

#include "sp-gradient.h"

#include "sp-stop.h"

#include "sp-stop-fns.h"

#include "sp-gradient-reference.h"

#include "sp-linear-gradient.h"

#include "sp-radial-gradient.h"

#include "gradient-chemistry.h"

#include "sp-text.h"

#include "sp-flowtext.h"

#include "display/canvas-bpath.h"

#include "display/canvas-arena.h"

#include "display/curve.h"

#include "livarot/Shape.h"

#include "2geom/isnan.h"

#include "prefs-utils.h"

#include "style.h"

#include "box3d.h"

#include "tweak-context.h"

#define DDC_RED_RGBA 0xff0000ff

#define DYNA_MIN_WIDTH 1.0e-6

static void sp_tweak_context_class_init(SPTweakContextClass *klass);

static void sp_tweak_context_init(SPTweakContext *ddc);

static void sp_tweak_context_dispose(GObject *object);

static void sp_tweak_context_setup(SPEventContext *ec);

static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);

static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);

static SPEventContextClass *parent_class;

sp_tweak_context_get_type(void)

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPTweakContextClass),

NULL, NULL,

(GClassInitFunc) sp_tweak_context_class_init,

NULL, NULL,

sizeof(SPTweakContext),

4,

(GInstanceInitFunc) sp_tweak_context_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);

}

return type;

}

static void

sp_tweak_context_class_init(SPTweakContextClass *klass)

{

GObjectClass *object_class = (GObjectClass *) klass;

SPEventContextClass *event_context_class = (SPEventContextClass *) klass;

parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);

object_class->dispose = sp_tweak_context_dispose;

event_context_class->setup = sp_tweak_context_setup;

event_context_class->set = sp_tweak_context_set;

event_context_class->root_handler = sp_tweak_context_root_handler;

}

static void

sp_tweak_context_init(SPTweakContext *tc)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(tc);

event_context->cursor_shape = cursor_push_xpm;

event_context->hot_x = 4;

event_context->hot_y = 4;

/* attributes */

tc->dragging = FALSE;

tc->width = 0.2;

tc->force = 0.2;

tc->pressure = TC_DEFAULT_PRESSURE;

tc->is_dilating = false;

tc->has_dilated = false;

tc->do_h = true;

tc->do_s = true;

tc->do_l = true;

tc->do_o = false;

new (&tc->style_set_connection) sigc::connection();

}

static void

sp_tweak_context_dispose(GObject *object)

{

SPTweakContext *tc = SP_TWEAK_CONTEXT(object);

tc->style_set_connection.disconnect();

tc->style_set_connection.~connection();

if (tc->dilate_area) {

gtk_object_destroy(GTK_OBJECT(tc->dilate_area));

tc->dilate_area = NULL;

}

if (tc->_message_context) {

delete tc->_message_context;

}

G_OBJECT_CLASS(parent_class)->dispose(object);

}

sp_tweak_update_cursor (SPTweakContext *tc, gint mode)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(tc);

switch (mode) {

case TWEAK_MODE_PUSH:

event_context->cursor_shape = cursor_push_xpm;

break;

case TWEAK_MODE_SHRINK:

event_context->cursor_shape = cursor_thin_xpm;

break;

case TWEAK_MODE_GROW:

event_context->cursor_shape = cursor_thicken_xpm;

break;

case TWEAK_MODE_ATTRACT:

event_context->cursor_shape = cursor_attract_xpm;

break;

case TWEAK_MODE_REPEL:

event_context->cursor_shape = cursor_repel_xpm;

break;

case TWEAK_MODE_ROUGHEN:

event_context->cursor_shape = cursor_roughen_xpm;

break;

case TWEAK_MODE_COLORPAINT:

case TWEAK_MODE_COLORJITTER:

event_context->cursor_shape = cursor_color_xpm;

break;

}

sp_event_context_update_cursor(event_context);

}

static bool

sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)

{

if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode

// we cannot store properties with uris

css = sp_css_attr_unset_uris ((SPCSSAttr *) css);

sp_repr_css_change (inkscape_get_repr (INKSCAPE, "tools.tweak"), (SPCSSAttr *) css, "style");

return true;

}

return false;

}

static void

sp_tweak_context_setup(SPEventContext *ec)

{

SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);

if (((SPEventContextClass *) parent_class)->setup)

((SPEventContextClass *) parent_class)->setup(ec);

{

/* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */

SPCurve *c = new SPCurve();

const double C1 = 0.552;

c->moveto(-1,0);

c->curveto(-1, C1, -C1, 1, 0, 1 );

c->curveto(C1, 1, 1, C1, 1, 0 );

c->curveto(1, -C1, C1, -1, 0, -1 );

c->curveto(-C1, -1, -1, -C1, -1, 0 );

c->closepath();

tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);

c->unref();

sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);

sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);

sp_canvas_item_hide(tc->dilate_area);

}

sp_event_context_read(ec, "width");

sp_event_context_read(ec, "mode");

sp_event_context_read(ec, "fidelity");

sp_event_context_read(ec, "force");

sp_event_context_read(ec, "usepressure");

sp_event_context_read(ec, "doh");

sp_event_context_read(ec, "dol");

sp_event_context_read(ec, "dos");

sp_event_context_read(ec, "doo");

tc->is_drawing = false;

tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());

tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool

sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)

);

if (prefs_get_int_attribute("tools.tweak", "selcue", 0) != 0) {

ec->enableSelectionCue();

}

if (prefs_get_int_attribute("tools.tweak", "gradientdrag", 0) != 0) {

ec->enableGrDrag();

}

}

static void

sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)

{

SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);

if (!strcmp(key, "width")) {

double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );

tc->width = CLAMP(dval, -1000.0, 1000.0);

} else if (!strcmp(key, "mode")) {

gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );

tc->mode = dval;

sp_tweak_update_cursor(tc, tc->mode);

} else if (!strcmp(key, "fidelity")) {

double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );

tc->fidelity = CLAMP(dval, 0.0, 1.0);

} else if (!strcmp(key, "force")) {

double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );

tc->force = CLAMP(dval, 0, 1.0);

} else if (!strcmp(key, "usepressure")) {

tc->usepressure = (val && strcmp(val, "0"));

} else if (!strcmp(key, "doh")) {

tc->do_h = (val && strcmp(val, "0"));

} else if (!strcmp(key, "dos")) {

tc->do_s = (val && strcmp(val, "0"));

} else if (!strcmp(key, "dol")) {

tc->do_l = (val && strcmp(val, "0"));

} else if (!strcmp(key, "doo")) {

tc->do_o = (val && strcmp(val, "0"));

}

}

static void

sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)

{

if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))

tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);

else

tc->pressure = TC_DEFAULT_PRESSURE;

}

get_dilate_radius (SPTweakContext *tc)

{

// 10 times the pen width:

return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();

}

get_dilate_force (SPTweakContext *tc)

{

double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)

/sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());

if (force > 3) {

force += 4 * (force - 3);

}

return force * tc->force;

}

sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)

{

bool did = false;

if (SP_IS_BOX3D(item)) {

// convert 3D boxes to ordinary groups before tweaking their shapes

item = SP_ITEM(box3d_convert_to_group(SP_BOX3D(item)));

selection->add(item);

}

if (SP_IS_GROUP(item)) {

for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {

if (SP_IS_ITEM(child)) {

if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))

did = true;

}

}

} else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {

Inkscape::XML::Node *newrepr = NULL;

gint pos = 0;

Inkscape::XML::Node *parent = NULL;

char const *id = NULL;

if (!SP_IS_PATH(item)) {

newrepr = sp_selected_item_to_curved_repr(item, 0);

if (!newrepr)

return false;

// remember the position of the item

pos = SP_OBJECT_REPR(item)->position();

// remember parent

parent = SP_OBJECT_REPR(item)->parent();

// remember id

id = SP_OBJECT_REPR(item)->attribute("id");

}

// skip those paths whose bboxes are entirely out of reach with our radius

boost::optional<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item));

if (bbox) {

bbox->growBy(radius);

if (!bbox->contains(p)) {

return false;

}

}

Path *orig = Path_for_item(item, false);

if (orig == NULL) {

return false;

}

Path *res = new Path;

res->SetBackData(false);

Shape *theShape = new Shape;

Shape *theRes = new Shape;

NR::Matrix i2doc(sp_item_i2doc_affine(item));

orig->ConvertWithBackData((0.08 - (0.07 * fidelity)) / NR::expansion(i2doc)); // default 0.059

orig->Fill(theShape, 0);

SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");

gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);

if (val && strcmp(val, "nonzero") == 0)

{

theRes->ConvertToShape(theShape, fill_nonZero);

}

else if (val && strcmp(val, "evenodd") == 0)

{

theRes->ConvertToShape(theShape, fill_oddEven);

}

else

{

theRes->ConvertToShape(theShape, fill_nonZero);

}

if (NR::L2(vector) != 0)

vector = 1/NR::L2(vector) * vector;

bool did_this = false;

if (mode == TWEAK_MODE_SHRINK || mode == TWEAK_MODE_GROW) {

if (theShape->MakeTweak(tweak_mode_grow, theRes,

mode == TWEAK_MODE_GROW? force : -force,

join_straight, 4.0,

true, p, NR::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed

did_this = true;

} else if (mode == TWEAK_MODE_ATTRACT || mode == TWEAK_MODE_REPEL) {

if (theShape->MakeTweak(tweak_mode_repel, theRes,

mode == TWEAK_MODE_REPEL? force : -force,

join_straight, 4.0,

true, p, NR::Point(0,0), radius, &i2doc) == 0)

did_this = true;

} else if (mode == TWEAK_MODE_PUSH) {

if (theShape->MakeTweak(tweak_mode_push, theRes,

1.0,

join_straight, 4.0,

true, p, force*2*vector, radius, &i2doc) == 0)

did_this = true;

} else if (mode == TWEAK_MODE_ROUGHEN) {

if (theShape->MakeTweak(tweak_mode_roughen, theRes,

force,

join_straight, 4.0,

true, p, NR::Point(0,0), radius, &i2doc) == 0)

did_this = true;

}

// the rest only makes sense if we actually changed the path

if (did_this) {

theRes->ConvertToShape(theShape, fill_positive);

res->Reset();

theRes->ConvertToForme(res);

double th_max = (0.6 - 0.59*sqrt(fidelity)) / NR::expansion(i2doc);

double threshold = MAX(th_max, th_max*force);

res->ConvertEvenLines(threshold);

res->Simplify(threshold / (selection->desktop()->current_zoom()));

if (newrepr) { // converting to path, need to replace the repr

bool is_selected = selection->includes(item);

if (is_selected)

selection->remove(item);

// It's going to resurrect, so we delete without notifying listeners.

SP_OBJECT(item)->deleteObject(false);

// restore id

newrepr->setAttribute("id", id);

// add the new repr to the parent

parent->appendChild(newrepr);

// move to the saved position

newrepr->setPosition(pos > 0 ? pos : 0);

if (is_selected)

selection->add(newrepr);

}

if (res->descr_cmd.size() > 1) {

gchar *str = res->svg_dump_path();

if (newrepr) {

newrepr->setAttribute("d", str);

} else {

if (SP_IS_LPE_ITEM(item) && sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(item))) {

SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);

} else {

SP_OBJECT_REPR(item)->setAttribute("d", str);

}

}

g_free(str);

} else {

// TODO: if there's 0 or 1 node left, delete this path altogether

}

if (newrepr) {

Inkscape::GC::release(newrepr);

newrepr = NULL;

}

}

delete theShape;

delete theRes;

delete orig;

delete res;

if (did_this)

did = true;

}

return did;

}

tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)

{

float rgb_g[3];

if (!do_h || !do_s || !do_l) {

float hsl_g[3];

sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));

float hsl_c[3];

sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);

if (!do_h)

hsl_g[0] = hsl_c[0];

if (!do_s)

hsl_g[1] = hsl_c[1];

if (!do_l)

hsl_g[2] = hsl_c[2];

sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);

} else {

rgb_g[0] = SP_RGBA32_R_F(goal);

rgb_g[1] = SP_RGBA32_G_F(goal);

rgb_g[2] = SP_RGBA32_B_F(goal);

}

for (int i = 0; i < 3; i++) {

double d = rgb_g[i] - color[i];

color[i] += d * force;

}

}

tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)

{

float hsl_c[3];

sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);

if (do_h) {

hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;

if (hsl_c[0] > 1)

hsl_c[0] -= 1;

if (hsl_c[0] < 0)

hsl_c[0] += 1;

}

if (do_s) {

hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;

}

if (do_l) {

hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;

}

sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);

}

tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)

{

if (mode == TWEAK_MODE_COLORPAINT) {

tweak_colorpaint (color, goal, force, do_h, do_s, do_l);

} else if (mode == TWEAK_MODE_COLORJITTER) {

tweak_colorjitter (color, force, do_h, do_s, do_l);

}

}

tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)

{

double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);

if (mode == TWEAK_MODE_COLORPAINT) {

double d = opacity_goal - opacity;

opacity += d * force;

} else if (mode == TWEAK_MODE_COLORJITTER) {

opacity += g_random_double_range(-opacity, 1 - opacity) * force;

}

style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);

}

tweak_profile (double dist, double radius)

{

if (radius == 0)

return 0;

double x = dist / radius;

double alpha = 1;

if (x >= 1) {

return 0;

} else if (x <= 0) {

return 1;

} else {

return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);

}

}

tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,

guint32 const rgb_goal, NR::Point p_w, double radius, double force, guint mode,

bool do_h, bool do_s, bool do_l, bool /*do_o*/)

{

SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);

if (!gradient || !SP_IS_GRADIENT(gradient))

return;

NR::Matrix i2d (sp_item_i2doc_affine (item));

NR::Point p = p_w * i2d.inverse();

p *= (gradient->gradientTransform).inverse();

// now p is in gradient's original coordinates

double pos = 0;

double r = 0;

if (SP_IS_LINEARGRADIENT(gradient)) {

SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);

NR::Point p1(lg->x1.computed, lg->y1.computed);

NR::Point p2(lg->x2.computed, lg->y2.computed);

NR::Point pdiff(p2 - p1);

double vl = NR::L2(pdiff);

// This is the matrix which moves and rotates the gradient line

// so it's oriented along the X axis:

NR::Matrix norm = NR::Matrix(NR::translate(-p1)) * NR::Matrix(NR::rotate(-atan2(pdiff[NR::Y], pdiff[NR::X])));

// Transform the mouse point by it to find out its projection onto the gradient line:

NR::Point pnorm = p * norm;

// Scale its X coordinate to match the length of the gradient line:

pos = pnorm[NR::X] / vl;

// Calculate radius in lenfth-of-gradient-line units

r = radius / vl;

} else if (SP_IS_RADIALGRADIENT(gradient)) {

SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);

NR::Point c (rg->cx.computed, rg->cy.computed);

pos = NR::L2(p - c) / rg->r.computed;

r = radius / rg->r.computed;

}

// Normalize pos to 0..1, taking into accound gradient spread:

double pos_e = pos;

if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {

if (pos > 1)

pos_e = 1;

if (pos < 0)

pos_e = 0;

} else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {

if (pos > 1 || pos < 0)

pos_e = pos - floor(pos);

} else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {

if (pos > 1 || pos < 0) {

bool odd = ((int)(floor(pos)) % 2 == 1);

pos_e = pos - floor(pos);

if (odd)

pos_e = 1 - pos_e;

}

}

SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);

double offset_l = 0;

double offset_h = 0;

SPObject *child_prev = NULL;

for (SPObject *child = sp_object_first_child(vector);

child != NULL; child = SP_OBJECT_NEXT(child)) {

if (!SP_IS_STOP(child))

continue;

SPStop *stop = SP_STOP (child);

offset_h = stop->offset;

if (child_prev) {

if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {

// the summit falls in this interstop, and the radius is small,

// so it only affects the ends of this interstop;

// distribute the force between the two endstops so that they

// get all the painting even if they are not touched by the brush

tweak_color (mode, stop->specified_color.v.c, rgb_goal,

force * (pos_e - offset_l) / (offset_h - offset_l),

do_h, do_s, do_l);

tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,

force * (offset_h - pos_e) / (offset_h - offset_l),

do_h, do_s, do_l);

SP_OBJECT(stop)->updateRepr();

child_prev->updateRepr();

break;

} else {

// wide brush, may affect more than 2 stops,

// paint each stop by the force from the profile curve

if (offset_l <= pos_e && offset_l > pos_e - r) {

tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,

force * tweak_profile (fabs (pos_e - offset_l), r),

do_h, do_s, do_l);

child_prev->updateRepr();

}

if (offset_h >= pos_e && offset_h < pos_e + r) {

tweak_color (mode, stop->specified_color.v.c, rgb_goal,

force * tweak_profile (fabs (pos_e - offset_h), r),

do_h, do_s, do_l);

SP_OBJECT(stop)->updateRepr();

}

}

}

offset_l = offset_h;

child_prev = child;

}

}

sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,

guint32 fill_goal, bool do_fill,

guint32 stroke_goal, bool do_stroke,

float opacity_goal, bool do_opacity,

NR::Point p, double radius, double force,

bool do_h, bool do_s, bool do_l, bool do_o)

{

bool did = false;

if (SP_IS_GROUP(item)) {

for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {

if (SP_IS_ITEM(child)) {

if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,

fill_goal, do_fill,

stroke_goal, do_stroke,

opacity_goal, do_opacity,

p, radius, force, do_h, do_s, do_l, do_o))

did = true;

}

}

} else {

SPStyle *style = SP_OBJECT_STYLE(item);

if (!style) {

return false;

}

boost::optional<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item),

SPItem::GEOMETRIC_BBOX);

if (!bbox) {

return false;

}

NR::Rect brush(p - NR::Point(radius, radius), p + NR::Point(radius, radius));

NR::Point center = bbox->midpoint();

double this_force;

if (item == item_at_point) {

this_force = force;

} else if (!bbox->intersects(brush)) {

return false;

//} else if (bbox->maxExtent() > 3 * radius) {

//}

} else {

this_force = force * tweak_profile (NR::L2 (p - center), radius);

}

if (this_force > 0.002) {

if (do_fill) {

if (style->fill.isPaintserver()) {

tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);

did = true;

} else if (style->fill.isColor()) {

tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);

item->updateRepr();

did = true;

}

}

if (do_stroke) {

if (style->stroke.isPaintserver()) {

tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);

did = true;

} else if (style->stroke.isColor()) {

tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);

item->updateRepr();

did = true;

}

}

if (do_opacity && do_o) {

tweak_opacity (mode, &style->opacity, opacity_goal, this_force);

}

}

}

return did;

}

sp_tweak_dilate (SPTweakContext *tc, NR::Point event_p, NR::Point p, NR::Point vector)

{

Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);

SPDesktop *desktop = SP_EVENT_CONTEXT(tc)->desktop;

if (selection->isEmpty()) {

return false;

}

bool did = false;

double radius = get_dilate_radius(tc);

double force = get_dilate_force(tc);

if (radius == 0 || force == 0) {

return false;

}

double color_force = MIN(sqrt(force)/20.0, 1);

SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);

bool do_fill = false, do_stroke = false, do_opacity = false;

guint32 fill_goal = sp_desktop_get_color_tool(desktop, "tools.tweak", true, &do_fill);

guint32 stroke_goal = sp_desktop_get_color_tool(desktop, "tools.tweak", false, &do_stroke);

double opacity_goal = sp_desktop_get_master_opacity_tool(desktop, "tools.tweak", &do_opacity);

for (GSList *items = g_slist_copy((GSList *) selection->itemList());

items != NULL;

items = items->next) {

SPItem *item = (SPItem *) items->data;

if (tc->mode == TWEAK_MODE_COLORPAINT || tc->mode == TWEAK_MODE_COLORJITTER) {

if (do_fill || do_stroke || do_opacity) {

if (sp_tweak_color_recursive (tc->mode, item, item_at_point,

fill_goal, do_fill,

stroke_goal, do_stroke,

opacity_goal, do_opacity,

p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))

did = true;

}

} else {

if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))

did = true;

}

}

return did;

}

sp_tweak_update_area (SPTweakContext *tc)

{

double radius = get_dilate_radius(tc);

NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));

sp_canvas_item_affine_absolute(tc->dilate_area, sm);

sp_canvas_item_show(tc->dilate_area);

}

sp_tweak_switch_mode (SPTweakContext *tc, gint mode)

{

SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);

// need to set explicitly, because the prefs may not have changed by the previous

tc->mode = mode;

sp_tweak_update_cursor (tc, mode);

}

sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)

{

// Juggling about so that prefs have the old value but tc->mode and the button show new mode:

gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);

SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);

// button has changed prefs, restore

prefs_set_int_attribute("tools.tweak", "mode", now_mode);

// changing prefs changed tc->mode, restore back :)

tc->mode = mode;

sp_tweak_update_cursor (tc, mode);

}

sp_tweak_context_root_handler(SPEventContext *event_context,

GdkEvent *event)

{

SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);

SPDesktop *desktop = event_context->desktop;

gint ret = FALSE;

switch (event->type) {

case GDK_ENTER_NOTIFY:

sp_canvas_item_show(tc->dilate_area);

break;

case GDK_LEAVE_NOTIFY:

sp_canvas_item_hide(tc->dilate_area);

break;

case GDK_BUTTON_PRESS:

if (event->button.button == 1 && !event_context->space_panning) {

if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {

return TRUE;

}

NR::Point const button_w(event->button.x,

event->button.y);

NR::Point const button_dt(desktop->w2d(button_w));

tc->last_push = desktop->dt2doc(button_dt);

sp_tweak_extinput(tc, event);

sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);

tc->is_drawing = true;

tc->is_dilating = true;

tc->has_dilated = false;

ret = TRUE;

}

break;

case GDK_MOTION_NOTIFY:

{

NR::Point const motion_w(event->motion.x,

event->motion.y);

NR::Point motion_dt(desktop->w2d(motion_w));

NR::Point motion_doc(desktop->dt2doc(motion_dt));

sp_tweak_extinput(tc, event);

// draw the dilating cursor

double radius = get_dilate_radius(tc);

NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));

sp_canvas_item_affine_absolute(tc->dilate_area, sm);

sp_canvas_item_show(tc->dilate_area);

guint num = 0;

if (!desktop->selection->isEmpty()) {

num = g_slist_length((GSList *) desktop->selection->itemList());

}

if (num == 0) {

tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));

} else {

switch (tc->mode) {

case TWEAK_MODE_PUSH:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Pushing %d</b> selected object",

"<b>Pushing %d</b> selected objects", num), num);

break;

case TWEAK_MODE_SHRINK:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Shrinking %d</b> selected object",

"<b>Shrinking %d</b> selected objects", num), num);

break;

case TWEAK_MODE_GROW:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Growing %d</b> selected object",

"<b>Growing %d</b> selected objects", num), num);

break;

case TWEAK_MODE_ATTRACT:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Attracting %d</b> selected object",

"<b>Attracting %d</b> selected objects", num), num);

break;

case TWEAK_MODE_REPEL:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Repelling %d</b> selected object",

"<b>Repelling %d</b> selected objects", num), num);

break;

case TWEAK_MODE_ROUGHEN:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Roughening %d</b> selected object",

"<b>Roughening %d</b> selected objects", num), num);

break;

case TWEAK_MODE_COLORPAINT:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Painting %d</b> selected object",

"<b>Painting %d</b> selected objects", num), num);

break;

case TWEAK_MODE_COLORJITTER:

tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Jittering colors in %d</b> selected object",

"<b>Jittering colors in %d</b> selected objects", num), num);

break;

}

}

// dilating:

if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {

sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push);

//tc->last_push = motion_doc;

tc->has_dilated = true;

// it's slow, so prevent clogging up with events

gobble_motion_events(GDK_BUTTON1_MASK);

return TRUE;

}

}

break;

case GDK_BUTTON_RELEASE:

{

NR::Point const motion_w(event->button.x, event->button.y);

NR::Point const motion_dt(desktop->w2d(motion_w));

sp_canvas_end_forced_full_redraws(desktop->canvas);

tc->is_drawing = false;

if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {

if (!tc->has_dilated) {

// if we did not rub, do a light tap

tc->pressure = 0.03;

sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), NR::Point(0,0));

}

tc->is_dilating = false;

tc->has_dilated = false;

switch (tc->mode) {

case TWEAK_MODE_PUSH:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Push tweak"));

break;

case TWEAK_MODE_SHRINK:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Shrink tweak"));

break;

case TWEAK_MODE_GROW:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Grow tweak"));

break;

case TWEAK_MODE_ATTRACT:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Attract tweak"));

break;

case TWEAK_MODE_REPEL:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Repel tweak"));

break;

case TWEAK_MODE_ROUGHEN:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Roughen tweak"));

break;

case TWEAK_MODE_COLORPAINT:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));

break;

case TWEAK_MODE_COLORJITTER:

sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),

SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));

break;

}

}

break;

}

case GDK_KEY_PRESS:

switch (get_group0_keyval (&event->key)) {

case GDK_p:

case GDK_P:

case GDK_1:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);

ret = TRUE;

}

break;

case GDK_s:

case GDK_S:

case GDK_2:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK);

ret = TRUE;

}

break;

case GDK_g:

case GDK_G:

case GDK_3:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_GROW);

ret = TRUE;

}

break;

case GDK_a:

case GDK_A:

case GDK_4:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT);

ret = TRUE;

}

break;

case GDK_e:

case GDK_E:

case GDK_5:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_REPEL);

ret = TRUE;

}

break;

case GDK_r:

case GDK_R:

case GDK_6:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);

ret = TRUE;

}

break;

case GDK_c:

case GDK_C:

case GDK_7:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT);

ret = TRUE;

}

break;

case GDK_j:

case GDK_J:

case GDK_8:

if (MOD__SHIFT_ONLY) {

sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER);

ret = TRUE;

}

break;

case GDK_Up:

case GDK_KP_Up:

if (!MOD__CTRL_ONLY) {

tc->force += 0.05;

if (tc->force > 1.0)

tc->force = 1.0;

desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);

ret = TRUE;

}

break;

case GDK_Down:

case GDK_KP_Down:

if (!MOD__CTRL_ONLY) {

tc->force -= 0.05;

if (tc->force < 0.0)

tc->force = 0.0;

desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);

ret = TRUE;

}

break;

case GDK_Right:

case GDK_KP_Right:

if (!MOD__CTRL_ONLY) {

tc->width += 0.01;

if (tc->width > 1.0)

tc->width = 1.0;

desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x

sp_tweak_update_area(tc);

ret = TRUE;

}

break;

case GDK_Left:

case GDK_KP_Left:

if (!MOD__CTRL_ONLY) {

tc->width -= 0.01;

if (tc->width < 0.01)

tc->width = 0.01;

desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);

sp_tweak_update_area(tc);

ret = TRUE;

}

break;

case GDK_Home:

case GDK_KP_Home:

tc->width = 0.01;

desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);

sp_tweak_update_area(tc);

ret = TRUE;

break;

case GDK_End:

case GDK_KP_End:

tc->width = 1.0;

desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);

sp_tweak_update_area(tc);

ret = TRUE;

break;

case GDK_x:

case GDK_X:

if (MOD__ALT_ONLY) {

desktop->setToolboxFocusTo ("altx-tweak");

ret = TRUE;

}

break;

case GDK_Control_L:

case GDK_Control_R:

if (MOD__SHIFT) {

sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);

} else {

sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);

}

break;

case GDK_Shift_L:

case GDK_Shift_R:

if (MOD__CTRL) {

sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);

}

break;

default:

break;

}

break;

case GDK_KEY_RELEASE:

switch (get_group0_keyval(&event->key)) {

case GDK_Control_L:

case GDK_Control_R:

sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));

tc->_message_context->clear();

break;

case GDK_Shift_L:

case GDK_Shift_R:

if (MOD__CTRL) {

sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);

}

break;

break;

default:

sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));

break;

}

default:

break;

}

if (!ret) {

if (((SPEventContextClass *) parent_class)->root_handler) {

ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);

}

}

return ret;

}