#define __SP_GRADIENT_CONTEXT_C__

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <gdk/gdkkeysyms.h>

#include "macros.h"

#include "document.h"

#include "selection.h"

#include "desktop.h"

#include "desktop-handles.h"

#include "message-context.h"

#include "message-stack.h"

#include "pixmaps/cursor-gradient.xpm"

#include "gradient-context.h"

#include <glibmm/i18n.h>

#include "prefs-utils.h"

#include "gradient-drag.h"

#include "gradient-chemistry.h"

#include "xml/repr.h"

#include "sp-item.h"

static void sp_gradient_context_class_init(SPGradientContextClass *klass);

static void sp_gradient_context_init(SPGradientContext *gr_context);

static void sp_gradient_context_dispose(GObject *object);

static void sp_gradient_context_setup(SPEventContext *ec);

static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);

static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);

static SPEventContextClass *parent_class;

GtkType sp_gradient_context_get_type()

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPGradientContextClass),

NULL, NULL,

(GClassInitFunc) sp_gradient_context_class_init,

NULL, NULL,

sizeof(SPGradientContext),

4,

(GInstanceInitFunc) sp_gradient_context_init,

NULL, /* value_table */

};

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

}

return type;

}

static void sp_gradient_context_class_init(SPGradientContextClass *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_gradient_context_dispose;

event_context_class->setup = sp_gradient_context_setup;

event_context_class->root_handler = sp_gradient_context_root_handler;

}

static void sp_gradient_context_init(SPGradientContext *gr_context)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);

event_context->cursor_shape = cursor_gradient_xpm;

event_context->hot_x = 4;

event_context->hot_y = 4;

event_context->xp = 0;

event_context->yp = 0;

event_context->tolerance = 0;

event_context->within_tolerance = false;

event_context->item_to_select = NULL;

}

static void sp_gradient_context_dispose(GObject *object)

{

SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);

SPEventContext *ec = SP_EVENT_CONTEXT(object);

ec->enableGrDrag(false);

if (rc->_message_context) {

delete rc->_message_context;

}

G_OBJECT_CLASS(parent_class)->dispose(object);

}

static void sp_gradient_context_setup(SPEventContext *ec)

{

SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);

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

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

}

if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {

ec->enableSelectionCue();

}

ec->enableGrDrag();

rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));

}

sp_gradient_context_select_next (SPEventContext *event_context)

{

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

drag->select_next();

}

sp_gradient_context_select_prev (SPEventContext *event_context)

{

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

drag->select_prev();

}

static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)

{

static bool dragging;

SPDesktop *desktop = event_context->desktop;

Inkscape::Selection *selection = sp_desktop_selection (desktop);

SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);

event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);

double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px

GrDrag *drag = event_context->_grdrag;

g_assert (drag);

gint ret = FALSE;

switch (event->type) {

case GDK_2BUTTON_PRESS:

if ( event->button.button == 1 ) {

for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {

SPItem *item = SP_ITEM(i->data);

SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);

guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);

SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);

SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);

sp_gradient_reset_to_userspace(priv, item);

}

sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,

_("Create default gradient"));

ret = TRUE;

}

break;

case GDK_BUTTON_PRESS:

if ( event->button.button == 1 ) {

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

// save drag origin

event_context->xp = (gint) button_w[NR::X];

event_context->yp = (gint) button_w[NR::Y];

event_context->within_tolerance = true;

// remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to

// enable Ctrl+doubleclick of exactly the selected item(s)

if (!(event->button.state & GDK_CONTROL_MASK))

event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);

dragging = true;

/* Position center */

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

/* Snap center to nearest magnetic point */

rc->origin = button_dt;

ret = TRUE;

}

break;

case GDK_MOTION_NOTIFY:

if ( dragging

&& ( event->motion.state & GDK_BUTTON1_MASK ) )

{

if ( event_context->within_tolerance

&& ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )

&& ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {

break; // do not drag if we're within tolerance from origin

}

// Once the user has moved farther than tolerance from the original location

// (indicating they intend to draw, not click), then always process the

// motion notify coordinates as given (no snapping back to origin)

event_context->within_tolerance = false;

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

event->motion.y);

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

sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);

ret = TRUE;

}

break;

case GDK_BUTTON_RELEASE:

event_context->xp = event_context->yp = 0;

if ( event->button.button == 1 ) {

dragging = false;

// unless clicked with Ctrl (to enable Ctrl+doubleclick)

if (event->button.state & GDK_CONTROL_MASK) {

ret = TRUE;

break;

}

if (!event_context->within_tolerance) {

// we've been dragging, do nothing (grdrag handles that)

} else if (event_context->item_to_select) {

// no dragging, select clicked item if any

if (event->button.state & GDK_SHIFT_MASK) {

selection->toggle(event_context->item_to_select);

} else {

selection->set(event_context->item_to_select);

}

} else {

// click in an empty space; do the same as Esc

if (drag->selected) {

drag->setSelected (NULL);

} else {

selection->clear();

}

}

event_context->item_to_select = NULL;

ret = TRUE;

}

break;

case GDK_KEY_PRESS:

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

case GDK_Alt_L:

case GDK_Alt_R:

case GDK_Control_L:

case GDK_Control_R:

case GDK_Shift_L:

case GDK_Shift_R:

case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)

case GDK_Meta_R:

sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,

_("<b>Ctrl</b>: snap gradient angle"),

_("<b>Shift</b>: draw gradient around the starting point"),

NULL);

break;

case GDK_x:

case GDK_X:

if (MOD__ALT_ONLY) {

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

ret = TRUE;

}

break;

case GDK_Escape:

if (drag->selected) {

drag->setSelected (NULL);

} else {

selection->clear();

}

ret = TRUE;

//TODO: make dragging escapable by Esc

break;

case GDK_Left: // move handle left

case GDK_KP_Left:

case GDK_KP_4:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift

else drag->selected_move_screen(-1, 0); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift

else drag->selected_move(-nudge, 0); // no shift

}

ret = TRUE;

}

break;

case GDK_Up: // move handle up

case GDK_KP_Up:

case GDK_KP_8:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift

else drag->selected_move_screen(0, 1); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift

else drag->selected_move(0, nudge); // no shift

}

ret = TRUE;

}

break;

case GDK_Right: // move handle right

case GDK_KP_Right:

case GDK_KP_6:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift

else drag->selected_move_screen(1, 0); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift

else drag->selected_move(nudge, 0); // no shift

}

ret = TRUE;

}

break;

case GDK_Down: // move handle down

case GDK_KP_Down:

case GDK_KP_2:

if (!MOD__CTRL) { // not ctrl

if (MOD__ALT) { // alt

if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift

else drag->selected_move_screen(0, -1); // no shift

}

else { // no alt

if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift

else drag->selected_move(0, -nudge); // no shift

}

ret = TRUE;

}

break;

case GDK_r:

case GDK_R:

if (MOD__SHIFT_ONLY) {

// First try selected dragger

if (drag && drag->selected) {

drag->selected_reverse_vector();

} else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)

for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {

sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);

sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);

}

}

// we did an undoable action

sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,

_("Invert gradient"));

ret = TRUE;

}

break;

default:

break;

}

break;

case GDK_KEY_RELEASE:

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

case GDK_Alt_L:

case GDK_Alt_R:

case GDK_Control_L:

case GDK_Control_R:

case GDK_Shift_L:

case GDK_Shift_R:

case GDK_Meta_L: // Meta is when you press Shift+Alt

case GDK_Meta_R:

event_context->defaultMessageContext()->clear();

break;

default:

break;

}

break;

default:

break;

}

if (!ret) {

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

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

}

}

return ret;

}

static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)

{

SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;

Inkscape::Selection *selection = sp_desktop_selection(desktop);

SPDocument *document = sp_desktop_document(desktop);

SPEventContext *ec = SP_EVENT_CONTEXT(&rc);

if (!selection->isEmpty()) {

int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);

int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);

SPGradient *vector;

if (ec->item_to_select) {

vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);

} else {

vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);

}

// HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs

SPCSSAttr *css = sp_repr_css_attr_new();

sp_repr_css_set_property(css, "fill-opacity", "1.0");

for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {

//FIXME: see above

sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");

sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);

if (type == SP_GRADIENT_TYPE_LINEAR) {

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P1, rc.origin, fill_or_stroke, true, false);

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P2, pt, fill_or_stroke, true, false);

} else if (type == SP_GRADIENT_TYPE_RADIAL) {

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, rc.origin, fill_or_stroke, true, false);

sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, pt, fill_or_stroke, true, false);

}

SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

if (ec->_grdrag) {

ec->_grdrag->updateDraggers();

// prevent regenerating draggers by selection modified signal, which sometimes

// comes too late and thus destroys the knot which we will now grab:

ec->_grdrag->local_change = true;

// give the grab out-of-bounds values of xp/yp because we're already dragging

// and therefore are already out of tolerance

ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),

type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_P2 : POINT_RG_R1,

fill_or_stroke, 99999, 99999, etime);

}

// We did an undoable action, but sp_document_done will be called by the knot when released

// status text; we do not track coords because this branch is run once, not all the time

// during drag

int n_objects = g_slist_length((GSList *) selection->itemList());

rc._message_context->setF(Inkscape::NORMAL_MESSAGE,

ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",

"<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),

n_objects);

} else {

sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));

}

}