56fe5c7d8ad73ba715ab32eb8a27e8fa2cec1442
1 #define __SP_GRADIENT_CONTEXT_C__
3 /*
4 * Gradient drawing and editing tool
5 *
6 * Authors:
7 * bulia byak <buliabyak@users.sf.net>
8 *
9 * Copyright (C) 2005 Authors
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #ifdef HAVE_CONFIG_H
15 # include "config.h"
16 #endif
19 #include <gdk/gdkkeysyms.h>
21 #include "macros.h"
22 #include "document.h"
23 #include "selection.h"
24 #include "desktop.h"
25 #include "desktop-handles.h"
26 #include "message-context.h"
27 #include "message-stack.h"
28 #include "pixmaps/cursor-gradient.xpm"
29 #include "pixmaps/cursor-gradient.pixbuf"
30 #include "gradient-context.h"
31 #include <glibmm/i18n.h>
32 #include "prefs-utils.h"
33 #include "gradient-drag.h"
34 #include "gradient-chemistry.h"
35 #include "xml/repr.h"
36 #include "sp-item.h"
38 static void sp_gradient_context_class_init(SPGradientContextClass *klass);
39 static void sp_gradient_context_init(SPGradientContext *gr_context);
40 static void sp_gradient_context_dispose(GObject *object);
42 static void sp_gradient_context_setup(SPEventContext *ec);
44 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);
46 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);
48 static SPEventContextClass *parent_class;
51 GtkType sp_gradient_context_get_type()
52 {
53 static GType type = 0;
54 if (!type) {
55 GTypeInfo info = {
56 sizeof(SPGradientContextClass),
57 NULL, NULL,
58 (GClassInitFunc) sp_gradient_context_class_init,
59 NULL, NULL,
60 sizeof(SPGradientContext),
61 4,
62 (GInstanceInitFunc) sp_gradient_context_init,
63 NULL, /* value_table */
64 };
65 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);
66 }
67 return type;
68 }
70 static void sp_gradient_context_class_init(SPGradientContextClass *klass)
71 {
72 GObjectClass *object_class = (GObjectClass *) klass;
73 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
75 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
77 object_class->dispose = sp_gradient_context_dispose;
79 event_context_class->setup = sp_gradient_context_setup;
80 event_context_class->root_handler = sp_gradient_context_root_handler;
81 }
83 static void sp_gradient_context_init(SPGradientContext *gr_context)
84 {
85 SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);
87 event_context->cursor_shape = cursor_gradient_xpm;
88 event_context->cursor_pixbuf = gdk_pixbuf_new_from_inline(
89 -1,
90 cursor_gradient_pixbuf,
91 FALSE,
92 NULL);
93 event_context->hot_x = 4;
94 event_context->hot_y = 4;
95 event_context->xp = 0;
96 event_context->yp = 0;
97 event_context->tolerance = 0;
98 event_context->within_tolerance = false;
99 event_context->item_to_select = NULL;
100 }
102 static void sp_gradient_context_dispose(GObject *object)
103 {
104 SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);
105 SPEventContext *ec = SP_EVENT_CONTEXT(object);
107 ec->enableGrDrag(false);
109 if (rc->_message_context) {
110 delete rc->_message_context;
111 }
113 G_OBJECT_CLASS(parent_class)->dispose(object);
114 }
116 static void sp_gradient_context_setup(SPEventContext *ec)
117 {
118 SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);
120 if (((SPEventContextClass *) parent_class)->setup) {
121 ((SPEventContextClass *) parent_class)->setup(ec);
122 }
124 if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {
125 ec->enableSelectionCue();
126 }
128 ec->enableGrDrag();
130 rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));
131 }
133 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
134 {
135 static bool dragging;
137 SPDesktop *desktop = event_context->desktop;
138 Inkscape::Selection *selection = sp_desktop_selection (desktop);
140 SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
142 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
143 double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
145 GrDrag *drag = event_context->_grdrag;
146 g_assert (drag);
148 gint ret = FALSE;
149 switch (event->type) {
150 case GDK_2BUTTON_PRESS:
151 if ( event->button.button == 1 ) {
152 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
153 SPItem *item = SP_ITEM(i->data);
154 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
155 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
157 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);
159 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
160 sp_gradient_reset_to_userspace(priv, item);
161 }
163 sp_document_done (sp_desktop_document (desktop));
165 ret = TRUE;
166 }
167 break;
168 case GDK_BUTTON_PRESS:
169 if ( event->button.button == 1 ) {
170 NR::Point const button_w(event->button.x, event->button.y);
172 // save drag origin
173 event_context->xp = (gint) button_w[NR::X];
174 event_context->yp = (gint) button_w[NR::Y];
175 event_context->within_tolerance = true;
177 // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
178 // enable Ctrl+doubleclick of exactly the selected item(s)
179 if (!(event->button.state & GDK_CONTROL_MASK))
180 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
182 dragging = true;
183 /* Position center */
184 NR::Point const button_dt = desktop->w2d(button_w);
185 /* Snap center to nearest magnetic point */
187 rc->origin = button_dt;
189 ret = TRUE;
190 }
191 break;
192 case GDK_MOTION_NOTIFY:
193 if ( dragging
194 && ( event->motion.state & GDK_BUTTON1_MASK ) )
195 {
196 if ( event_context->within_tolerance
197 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
198 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
199 break; // do not drag if we're within tolerance from origin
200 }
201 // Once the user has moved farther than tolerance from the original location
202 // (indicating they intend to draw, not click), then always process the
203 // motion notify coordinates as given (no snapping back to origin)
204 event_context->within_tolerance = false;
206 NR::Point const motion_w(event->motion.x,
207 event->motion.y);
208 NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
210 sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
212 ret = TRUE;
213 }
214 break;
215 case GDK_BUTTON_RELEASE:
216 event_context->xp = event_context->yp = 0;
217 if ( event->button.button == 1 ) {
218 dragging = false;
220 // unless clicked with Ctrl (to enable Ctrl+doubleclick)
221 if (event->button.state & GDK_CONTROL_MASK) {
222 ret = TRUE;
223 break;
224 }
226 if (!event_context->within_tolerance) {
227 // we've been dragging, do nothing (grdrag handles that)
228 } else if (event_context->item_to_select) {
229 // no dragging, select clicked item if any
230 if (event->button.state & GDK_SHIFT_MASK) {
231 selection->toggle(event_context->item_to_select);
232 } else {
233 selection->set(event_context->item_to_select);
234 }
235 } else {
236 // click in an empty space; do the same as Esc
237 if (drag->selected) {
238 drag->setSelected (NULL);
239 } else {
240 selection->clear();
241 }
242 }
244 event_context->item_to_select = NULL;
245 ret = TRUE;
246 }
247 break;
248 case GDK_KEY_PRESS:
249 switch (get_group0_keyval (&event->key)) {
250 case GDK_Alt_L:
251 case GDK_Alt_R:
252 case GDK_Control_L:
253 case GDK_Control_R:
254 case GDK_Shift_L:
255 case GDK_Shift_R:
256 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
257 case GDK_Meta_R:
258 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
259 _("<b>Ctrl</b>: snap gradient angle"),
260 _("<b>Shift</b>: draw gradient around the starting point"),
261 NULL);
262 break;
264 case GDK_x:
265 case GDK_X:
266 if (MOD__ALT_ONLY) {
267 desktop->setToolboxFocusTo ("altx-grad");
268 ret = TRUE;
269 }
270 break;
272 case GDK_Escape:
273 if (drag->selected) {
274 drag->setSelected (NULL);
275 } else {
276 selection->clear();
277 }
278 ret = TRUE;
279 //TODO: make dragging escapable by Esc
280 break;
282 case GDK_Tab: // Tab - cycle selection forward
283 if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
284 drag->select_next();
285 ret = TRUE;
286 }
287 break;
288 case GDK_ISO_Left_Tab: // Shift Tab - cycle selection backward
289 if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
290 drag->select_prev();
291 ret = TRUE;
292 }
293 break;
295 case GDK_Left: // move handle left
296 case GDK_KP_Left:
297 case GDK_KP_4:
298 if (!MOD__CTRL) { // not ctrl
299 if (MOD__ALT) { // alt
300 if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift
301 else drag->selected_move_screen(-1, 0); // no shift
302 }
303 else { // no alt
304 if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift
305 else drag->selected_move(-nudge, 0); // no shift
306 }
307 ret = TRUE;
308 }
309 break;
310 case GDK_Up: // move handle up
311 case GDK_KP_Up:
312 case GDK_KP_8:
313 if (!MOD__CTRL) { // not ctrl
314 if (MOD__ALT) { // alt
315 if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift
316 else drag->selected_move_screen(0, 1); // no shift
317 }
318 else { // no alt
319 if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift
320 else drag->selected_move(0, nudge); // no shift
321 }
322 ret = TRUE;
323 }
324 break;
325 case GDK_Right: // move handle right
326 case GDK_KP_Right:
327 case GDK_KP_6:
328 if (!MOD__CTRL) { // not ctrl
329 if (MOD__ALT) { // alt
330 if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift
331 else drag->selected_move_screen(1, 0); // no shift
332 }
333 else { // no alt
334 if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift
335 else drag->selected_move(nudge, 0); // no shift
336 }
337 ret = TRUE;
338 }
339 break;
340 case GDK_Down: // move handle down
341 case GDK_KP_Down:
342 case GDK_KP_2:
343 if (!MOD__CTRL) { // not ctrl
344 if (MOD__ALT) { // alt
345 if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift
346 else drag->selected_move_screen(0, -1); // no shift
347 }
348 else { // no alt
349 if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift
350 else drag->selected_move(0, -nudge); // no shift
351 }
352 ret = TRUE;
353 }
354 break;
355 case GDK_r:
356 case GDK_R:
357 if (MOD__SHIFT_ONLY) {
358 // First try selected dragger
359 if (drag && drag->selected) {
360 drag->selected_reverse_vector();
361 } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
362 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
363 sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
364 sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
365 }
366 }
367 // we did an undoable action
368 sp_document_done (sp_desktop_document (desktop));
369 ret = TRUE;
370 }
371 break;
372 default:
373 break;
374 }
375 break;
376 case GDK_KEY_RELEASE:
377 switch (get_group0_keyval (&event->key)) {
378 case GDK_Alt_L:
379 case GDK_Alt_R:
380 case GDK_Control_L:
381 case GDK_Control_R:
382 case GDK_Shift_L:
383 case GDK_Shift_R:
384 case GDK_Meta_L: // Meta is when you press Shift+Alt
385 case GDK_Meta_R:
386 event_context->defaultMessageContext()->clear();
387 break;
388 default:
389 break;
390 }
391 break;
392 default:
393 break;
394 }
396 if (!ret) {
397 if (((SPEventContextClass *) parent_class)->root_handler) {
398 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
399 }
400 }
402 return ret;
403 }
405 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
406 {
407 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
408 Inkscape::Selection *selection = sp_desktop_selection(desktop);
409 SPDocument *document = sp_desktop_document(desktop);
410 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
412 if (!selection->isEmpty()) {
413 int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
414 int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
416 SPGradient *vector;
417 if (ec->item_to_select) {
418 vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
419 } else {
420 vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
421 }
423 // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
424 SPCSSAttr *css = sp_repr_css_attr_new();
425 sp_repr_css_set_property(css, "fill-opacity", "1.0");
427 for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
429 //FIXME: see above
430 sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
432 sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
434 if (type == SP_GRADIENT_TYPE_LINEAR) {
435 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P1, rc.origin, fill_or_stroke, true, false);
436 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P2, pt, fill_or_stroke, true, false);
437 } else if (type == SP_GRADIENT_TYPE_RADIAL) {
438 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, rc.origin, fill_or_stroke, true, false);
439 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, pt, fill_or_stroke, true, false);
440 }
441 SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
442 }
443 if (ec->_grdrag) {
444 ec->_grdrag->updateDraggers();
445 // prevent regenerating draggers by selection modified signal, which sometimes
446 // comes too late and thus destroys the knot which we will now grab:
447 ec->_grdrag->local_change = true;
448 // give the grab out-of-bounds values of xp/yp because we're already dragging
449 // and therefore are already out of tolerance
450 ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
451 type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_P2 : POINT_RG_R1,
452 fill_or_stroke, 99999, 99999, etime);
453 }
454 // We did an undoable action, but sp_document_done will be called by the knot when released
456 // status text; we do not track coords because this branch is run once, not all the time
457 // during drag
458 int n_objects = g_slist_length((GSList *) selection->itemList());
459 rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
460 ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
461 "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
462 n_objects);
463 } else {
464 sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
465 }
466 }
469 /*
470 Local Variables:
471 mode:c++
472 c-file-style:"stroustrup"
473 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
474 indent-tabs-mode:nil
475 fill-column:99
476 End:
477 */
478 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :