Code

remove g++ 4.1.1 compiler errors
[inkscape.git] / src / gradient-context.cpp
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 "gradient-context.h"
30 #include <glibmm/i18n.h>
31 #include "prefs-utils.h"
32 #include "gradient-drag.h"
33 #include "gradient-chemistry.h"
34 #include "xml/repr.h"
35 #include "sp-item.h"
37 static void sp_gradient_context_class_init(SPGradientContextClass *klass);
38 static void sp_gradient_context_init(SPGradientContext *gr_context);
39 static void sp_gradient_context_dispose(GObject *object);
41 static void sp_gradient_context_setup(SPEventContext *ec);
43 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);
45 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);
47 static SPEventContextClass *parent_class;
50 GtkType sp_gradient_context_get_type()
51 {
52     static GType type = 0;
53     if (!type) {
54         GTypeInfo info = {
55             sizeof(SPGradientContextClass),
56             NULL, NULL,
57             (GClassInitFunc) sp_gradient_context_class_init,
58             NULL, NULL,
59             sizeof(SPGradientContext),
60             4,
61             (GInstanceInitFunc) sp_gradient_context_init,
62             NULL,    /* value_table */
63         };
64         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);
65     }
66     return type;
67 }
69 static void sp_gradient_context_class_init(SPGradientContextClass *klass)
70 {
71     GObjectClass *object_class = (GObjectClass *) klass;
72     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
74     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
76     object_class->dispose = sp_gradient_context_dispose;
78     event_context_class->setup = sp_gradient_context_setup;
79     event_context_class->root_handler  = sp_gradient_context_root_handler;
80 }
82 static void sp_gradient_context_init(SPGradientContext *gr_context)
83 {
84     SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);
86     event_context->cursor_shape = cursor_gradient_xpm;
87     event_context->hot_x = 4;
88     event_context->hot_y = 4;
89     event_context->xp = 0;
90     event_context->yp = 0;
91     event_context->tolerance = 0;
92     event_context->within_tolerance = false;
93     event_context->item_to_select = NULL;
94 }
96 static void sp_gradient_context_dispose(GObject *object)
97 {
98     SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);
99     SPEventContext *ec = SP_EVENT_CONTEXT(object);
101     ec->enableGrDrag(false);
103     if (rc->_message_context) {
104         delete rc->_message_context;
105     }
107     G_OBJECT_CLASS(parent_class)->dispose(object);
110 static void sp_gradient_context_setup(SPEventContext *ec)
112     SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);
114     if (((SPEventContextClass *) parent_class)->setup) {
115         ((SPEventContextClass *) parent_class)->setup(ec);
116     }
118     if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {
119         ec->enableSelectionCue();
120     }
122     ec->enableGrDrag();
124     rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));
127 void 
128 sp_gradient_context_select_next (SPEventContext *event_context)
130     GrDrag *drag = event_context->_grdrag;
131     g_assert (drag);
133     drag->select_next();
136 void 
137 sp_gradient_context_select_prev (SPEventContext *event_context)
139     GrDrag *drag = event_context->_grdrag;
140     g_assert (drag);
142     drag->select_prev();
145 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
147     static bool dragging;
149     SPDesktop *desktop = event_context->desktop;
150     Inkscape::Selection *selection = sp_desktop_selection (desktop);
152     SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
154     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
155     double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
157     GrDrag *drag = event_context->_grdrag;
158     g_assert (drag);
160     gint ret = FALSE;
161     switch (event->type) {
162     case GDK_2BUTTON_PRESS:
163         if ( event->button.button == 1 ) {
164             for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
165                 SPItem *item = SP_ITEM(i->data);
166                 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
167                 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
169                 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop,                                                                                   SP_OBJECT (item), new_fill);
171                 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
172                 sp_gradient_reset_to_userspace(priv, item);
173             }
175             sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
176                               _("Create default gradient"));
178             ret = TRUE;
179         }
180         break;
181     case GDK_BUTTON_PRESS:
182         if ( event->button.button == 1 ) {
183             NR::Point const button_w(event->button.x, event->button.y);
185             // save drag origin
186             event_context->xp = (gint) button_w[NR::X];
187             event_context->yp = (gint) button_w[NR::Y];
188             event_context->within_tolerance = true;
190             // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
191             // enable Ctrl+doubleclick of exactly the selected item(s)
192             if (!(event->button.state & GDK_CONTROL_MASK))
193                 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
195             dragging = true;
196             /* Position center */
197             NR::Point const button_dt = desktop->w2d(button_w);
198             /* Snap center to nearest magnetic point */
200             rc->origin = button_dt;
202             ret = TRUE;
203         }
204         break;
205     case GDK_MOTION_NOTIFY:
206         if ( dragging
207              && ( event->motion.state & GDK_BUTTON1_MASK ) )
208         {
209             if ( event_context->within_tolerance
210                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
211                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
212                 break; // do not drag if we're within tolerance from origin
213             }
214             // Once the user has moved farther than tolerance from the original location
215             // (indicating they intend to draw, not click), then always process the
216             // motion notify coordinates as given (no snapping back to origin)
217             event_context->within_tolerance = false;
219             NR::Point const motion_w(event->motion.x,
220                                      event->motion.y);
221             NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
223             sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
225             ret = TRUE;
226         }
227         break;
228     case GDK_BUTTON_RELEASE:
229         event_context->xp = event_context->yp = 0;
230         if ( event->button.button == 1 ) {
231             dragging = false;
233             // unless clicked with Ctrl (to enable Ctrl+doubleclick)
234             if (event->button.state & GDK_CONTROL_MASK) {
235                 ret = TRUE;
236                 break;
237             }
239             if (!event_context->within_tolerance) {
240                 // we've been dragging, do nothing (grdrag handles that)
241             } else if (event_context->item_to_select) {
242                 // no dragging, select clicked item if any
243                 if (event->button.state & GDK_SHIFT_MASK) {
244                     selection->toggle(event_context->item_to_select);
245                 } else {
246                     selection->set(event_context->item_to_select);
247                 }
248             } else {
249                 // click in an empty space; do the same as Esc
250                 if (drag->selected) {
251                     drag->setSelected (NULL);
252                 } else {
253                     selection->clear();
254                 }
255             }
257             event_context->item_to_select = NULL;
258             ret = TRUE;
259         }
260         break;
261     case GDK_KEY_PRESS:
262         switch (get_group0_keyval (&event->key)) {
263         case GDK_Alt_L:
264         case GDK_Alt_R:
265         case GDK_Control_L:
266         case GDK_Control_R:
267         case GDK_Shift_L:
268         case GDK_Shift_R:
269         case GDK_Meta_L:  // Meta is when you press Shift+Alt (at least on my machine)
270         case GDK_Meta_R:
271             sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
272                                         _("<b>Ctrl</b>: snap gradient angle"),
273                                         _("<b>Shift</b>: draw gradient around the starting point"),
274                                         NULL);
275             break;
277         case GDK_x:
278         case GDK_X:
279             if (MOD__ALT_ONLY) {
280                 desktop->setToolboxFocusTo ("altx-grad");
281                 ret = TRUE;
282             }
283             break;
285         case GDK_Escape:
286             if (drag->selected) {
287                 drag->setSelected (NULL);
288             } else {
289                 selection->clear();
290             }
291             ret = TRUE;
292             //TODO: make dragging escapable by Esc
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), SP_VERB_CONTEXT_GRADIENT,
369                                   _("Invert gradient"));
370                 ret = TRUE;
371             }
372             break;
373         default:
374             break;
375         }
376         break;
377     case GDK_KEY_RELEASE:
378         switch (get_group0_keyval (&event->key)) {
379         case GDK_Alt_L:
380         case GDK_Alt_R:
381         case GDK_Control_L:
382         case GDK_Control_R:
383         case GDK_Shift_L:
384         case GDK_Shift_R:
385         case GDK_Meta_L:  // Meta is when you press Shift+Alt
386         case GDK_Meta_R:
387             event_context->defaultMessageContext()->clear();
388             break;
389         default:
390             break;
391         }
392         break;
393     default:
394         break;
395     }
397     if (!ret) {
398         if (((SPEventContextClass *) parent_class)->root_handler) {
399             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
400         }
401     }
403     return ret;
406 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
408     SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
409     Inkscape::Selection *selection = sp_desktop_selection(desktop);
410     SPDocument *document = sp_desktop_document(desktop);
411     SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
413     if (!selection->isEmpty()) {
414         int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
415         int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
417         SPGradient *vector;
418         if (ec->item_to_select) {
419             vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
420         } else {
421             vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
422         }
424         // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
425         SPCSSAttr *css = sp_repr_css_attr_new();
426         sp_repr_css_set_property(css, "fill-opacity", "1.0");
428         for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
430             //FIXME: see above
431             sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
433             sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
435             if (type == SP_GRADIENT_TYPE_LINEAR) {
436                 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P1, rc.origin, fill_or_stroke, true, false);
437                 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P2, pt, fill_or_stroke, true, false);
438             } else if (type == SP_GRADIENT_TYPE_RADIAL) {
439                 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, rc.origin, fill_or_stroke, true, false);
440                 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, pt, fill_or_stroke, true, false);
441             }
442             SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
443         }
444         if (ec->_grdrag) {
445             ec->_grdrag->updateDraggers();
446             // prevent regenerating draggers by selection modified signal, which sometimes
447             // comes too late and thus destroys the knot which we will now grab:
448             ec->_grdrag->local_change = true;
449             // give the grab out-of-bounds values of xp/yp because we're already dragging
450             // and therefore are already out of tolerance
451             ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
452                                    type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_P2 : POINT_RG_R1,
453                                    fill_or_stroke, 99999, 99999, etime);
454         }
455         // We did an undoable action, but sp_document_done will be called by the knot when released
457         // status text; we do not track coords because this branch is run once, not all the time
458         // during drag
459         int n_objects = g_slist_length((GSList *) selection->itemList());
460         rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
461                                   ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
462                                            "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
463                                   n_objects);
464     } else {
465         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
466     }
470 /*
471   Local Variables:
472   mode:c++
473   c-file-style:"stroustrup"
474   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
475   indent-tabs-mode:nil
476   fill-column:99
477   End:
478 */
479 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :