1 #define __SP_RECT_CONTEXT_C__
3 /*
4 * Rectangle drawing context
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 *
10 * Copyright (C) 2000-2005 authors
11 * Copyright (C) 2000-2001 Ximian, Inc.
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "config.h"
18 #include <gdk/gdkkeysyms.h>
20 #include "macros.h"
21 #include "display/sp-canvas.h"
22 #include "sp-rect.h"
23 #include "document.h"
24 #include "sp-namedview.h"
25 #include "selection.h"
26 #include "desktop-handles.h"
27 #include "snap.h"
28 #include "desktop.h"
29 #include "desktop-style.h"
30 #include "message-context.h"
31 #include "pixmaps/cursor-rect.xpm"
32 #include "rect-context.h"
33 #include "sp-metrics.h"
34 #include <glibmm/i18n.h>
35 #include "object-edit.h"
36 #include "xml/repr.h"
37 #include "xml/node-event-vector.h"
38 #include "prefs-utils.h"
39 #include "context-fns.h"
41 static void sp_rect_context_class_init(SPRectContextClass *klass);
42 static void sp_rect_context_init(SPRectContext *rect_context);
43 static void sp_rect_context_dispose(GObject *object);
45 static void sp_rect_context_setup(SPEventContext *ec);
46 static void sp_rect_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
48 static gint sp_rect_context_root_handler(SPEventContext *event_context, GdkEvent *event);
49 static gint sp_rect_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
51 static void sp_rect_drag(SPRectContext &rc, NR::Point const pt, guint state);
52 static void sp_rect_finish(SPRectContext *rc);
54 static SPEventContextClass *parent_class;
57 GtkType sp_rect_context_get_type()
58 {
59 static GType type = 0;
60 if (!type) {
61 GTypeInfo info = {
62 sizeof(SPRectContextClass),
63 NULL, NULL,
64 (GClassInitFunc) sp_rect_context_class_init,
65 NULL, NULL,
66 sizeof(SPRectContext),
67 4,
68 (GInstanceInitFunc) sp_rect_context_init,
69 NULL, /* value_table */
70 };
71 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPRectContext", &info, (GTypeFlags) 0);
72 }
73 return type;
74 }
76 static void sp_rect_context_class_init(SPRectContextClass *klass)
77 {
78 GObjectClass *object_class = (GObjectClass *) klass;
79 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
81 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
83 object_class->dispose = sp_rect_context_dispose;
85 event_context_class->setup = sp_rect_context_setup;
86 event_context_class->set = sp_rect_context_set;
87 event_context_class->root_handler = sp_rect_context_root_handler;
88 event_context_class->item_handler = sp_rect_context_item_handler;
89 }
91 static void sp_rect_context_init(SPRectContext *rect_context)
92 {
93 SPEventContext *event_context = SP_EVENT_CONTEXT(rect_context);
95 event_context->cursor_shape = cursor_rect_xpm;
96 event_context->hot_x = 4;
97 event_context->hot_y = 4;
98 event_context->xp = 0;
99 event_context->yp = 0;
100 event_context->tolerance = 0;
101 event_context->within_tolerance = false;
102 event_context->item_to_select = NULL;
104 event_context->shape_repr = NULL;
105 event_context->shape_knot_holder = NULL;
107 rect_context->item = NULL;
109 rect_context->rx = 0.0;
110 rect_context->ry = 0.0;
112 new (&rect_context->sel_changed_connection) sigc::connection();
113 }
115 static void sp_rect_context_dispose(GObject *object)
116 {
117 SPRectContext *rc = SP_RECT_CONTEXT(object);
118 SPEventContext *ec = SP_EVENT_CONTEXT(object);
120 ec->enableGrDrag(false);
122 rc->sel_changed_connection.disconnect();
123 rc->sel_changed_connection.~connection();
125 /* fixme: This is necessary because we do not grab */
126 if (rc->item) {
127 sp_rect_finish(rc);
128 }
130 if (ec->shape_knot_holder) {
131 sp_knot_holder_destroy(ec->shape_knot_holder);
132 ec->shape_knot_holder = NULL;
133 }
135 if (ec->shape_repr) { // remove old listener
136 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
137 Inkscape::GC::release(ec->shape_repr);
138 ec->shape_repr = 0;
139 }
141 if (rc->_message_context) {
142 delete rc->_message_context;
143 }
145 G_OBJECT_CLASS(parent_class)->dispose(object);
146 }
148 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
149 NULL, /* child_added */
150 NULL, /* child_removed */
151 ec_shape_event_attr_changed,
152 NULL, /* content_changed */
153 NULL /* order_changed */
154 };
156 /**
157 \brief Callback that processes the "changed" signal on the selection;
158 destroys old and creates new knotholder
159 */
160 void sp_rect_context_selection_changed(Inkscape::Selection *selection, gpointer data)
161 {
162 SPRectContext *rc = SP_RECT_CONTEXT(data);
163 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
165 if (ec->shape_knot_holder) { // destroy knotholder
166 sp_knot_holder_destroy(ec->shape_knot_holder);
167 ec->shape_knot_holder = NULL;
168 }
170 if (ec->shape_repr) { // remove old listener
171 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
172 Inkscape::GC::release(ec->shape_repr);
173 ec->shape_repr = 0;
174 }
176 SPItem *item = selection->singleItem();
177 if (item) {
178 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
179 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
180 if (shape_repr) {
181 ec->shape_repr = shape_repr;
182 Inkscape::GC::anchor(shape_repr);
183 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
184 }
185 }
186 }
188 static void sp_rect_context_setup(SPEventContext *ec)
189 {
190 SPRectContext *rc = SP_RECT_CONTEXT(ec);
192 if (((SPEventContextClass *) parent_class)->setup) {
193 ((SPEventContextClass *) parent_class)->setup(ec);
194 }
196 SPItem *item = SP_DT_SELECTION(ec->desktop)->singleItem();
197 if (item) {
198 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
199 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
200 if (shape_repr) {
201 ec->shape_repr = shape_repr;
202 Inkscape::GC::anchor(shape_repr);
203 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
204 }
205 }
207 rc->sel_changed_connection.disconnect();
208 rc->sel_changed_connection = SP_DT_SELECTION(ec->desktop)->connectChanged(
209 sigc::bind(sigc::ptr_fun(&sp_rect_context_selection_changed), (gpointer)rc)
210 );
212 sp_event_context_read(ec, "rx");
213 sp_event_context_read(ec, "ry");
215 if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
216 ec->enableSelectionCue();
217 }
219 if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
220 ec->enableGrDrag();
221 }
223 rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
224 }
226 static void sp_rect_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
227 {
228 SPRectContext *rc = SP_RECT_CONTEXT(ec);
230 /* fixme: Proper error handling for non-numeric data. Use a locale-independent function like
231 * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
232 if ( strcmp(key, "rx") == 0 ) {
233 rc->rx = ( val
234 ? g_ascii_strtod (val, NULL)
235 : 0.0 );
236 } else if ( strcmp(key, "ry") == 0 ) {
237 rc->ry = ( val
238 ? g_ascii_strtod (val, NULL)
239 : 0.0 );
240 }
241 }
243 static gint sp_rect_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
244 {
245 SPDesktop *desktop = event_context->desktop;
247 gint ret = FALSE;
249 switch (event->type) {
250 case GDK_BUTTON_PRESS:
251 if ( event->button.button == 1 ) {
252 Inkscape::setup_for_drag_start(desktop, event_context, event);
253 ret = TRUE;
254 }
255 break;
256 // motion and release are always on root (why?)
257 default:
258 break;
259 }
261 if (((SPEventContextClass *) parent_class)->item_handler) {
262 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
263 }
265 return ret;
266 }
268 static gint sp_rect_context_root_handler(SPEventContext *event_context, GdkEvent *event)
269 {
270 static bool dragging;
272 SPDesktop *desktop = event_context->desktop;
273 Inkscape::Selection *selection = SP_DT_SELECTION (desktop);
275 SPRectContext *rc = SP_RECT_CONTEXT(event_context);
277 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
279 gint ret = FALSE;
280 switch (event->type) {
281 case GDK_BUTTON_PRESS:
282 if ( event->button.button == 1 ) {
283 NR::Point const button_w(event->button.x,
284 event->button.y);
286 // save drag origin
287 event_context->xp = (gint) button_w[NR::X];
288 event_context->yp = (gint) button_w[NR::Y];
289 event_context->within_tolerance = true;
291 // remember clicked item, disregarding groups, honoring Alt
292 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
294 dragging = true;
296 /* Position center */
297 NR::Point const button_dt(desktop->w2d(button_w));
299 /* Snap center */
300 SnapManager const m(desktop->namedview);
301 rc->center = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
302 button_dt, rc->item).getPoint();
304 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
305 ( GDK_KEY_PRESS_MASK |
306 GDK_BUTTON_RELEASE_MASK |
307 GDK_POINTER_MOTION_MASK |
308 GDK_POINTER_MOTION_HINT_MASK |
309 GDK_BUTTON_PRESS_MASK ),
310 NULL, event->button.time);
311 ret = TRUE;
312 }
313 break;
314 case GDK_MOTION_NOTIFY:
315 if ( dragging
316 && ( event->motion.state & GDK_BUTTON1_MASK ) )
317 {
318 if ( event_context->within_tolerance
319 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
320 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
321 break; // do not drag if we're within tolerance from origin
322 }
323 // Once the user has moved farther than tolerance from the original location
324 // (indicating they intend to draw, not click), then always process the
325 // motion notify coordinates as given (no snapping back to origin)
326 event_context->within_tolerance = false;
328 NR::Point const motion_w(event->motion.x,
329 event->motion.y);
330 NR::Point const motion_dt(desktop->w2d(motion_w));
331 sp_rect_drag(*rc, motion_dt, event->motion.state);
332 ret = TRUE;
333 }
334 break;
335 case GDK_BUTTON_RELEASE:
336 event_context->xp = event_context->yp = 0;
337 if ( event->button.button == 1 ) {
338 dragging = false;
340 if (!event_context->within_tolerance) {
341 // we've been dragging, finish the rect
342 sp_rect_finish(rc);
343 } else if (event_context->item_to_select) {
344 // no dragging, select clicked item if any
345 if (event->button.state & GDK_SHIFT_MASK) {
346 selection->toggle(event_context->item_to_select);
347 } else {
348 selection->set(event_context->item_to_select);
349 }
350 } else {
351 // click in an empty space
352 selection->clear();
353 }
355 event_context->item_to_select = NULL;
356 ret = TRUE;
357 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
358 event->button.time);
359 }
360 break;
361 case GDK_KEY_PRESS:
362 switch (get_group0_keyval (&event->key)) {
363 case GDK_Alt_L:
364 case GDK_Alt_R:
365 case GDK_Control_L:
366 case GDK_Control_R:
367 case GDK_Shift_L:
368 case GDK_Shift_R:
369 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
370 case GDK_Meta_R:
371 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
372 _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
373 _("<b>Shift</b>: draw around the starting point"),
374 NULL);
375 break;
376 case GDK_Up:
377 case GDK_Down:
378 case GDK_KP_Up:
379 case GDK_KP_Down:
380 // prevent the zoom field from activation
381 if (!MOD__CTRL_ONLY)
382 ret = TRUE;
383 break;
385 case GDK_x:
386 case GDK_X:
387 if (MOD__ALT_ONLY) {
388 desktop->setToolboxFocusTo ("altx-rect");
389 ret = TRUE;
390 }
391 break;
393 case GDK_Escape:
394 SP_DT_SELECTION(desktop)->clear();
395 //TODO: make dragging escapable by Esc
396 default:
397 break;
398 }
399 break;
400 case GDK_KEY_RELEASE:
401 switch (get_group0_keyval (&event->key)) {
402 case GDK_Alt_L:
403 case GDK_Alt_R:
404 case GDK_Control_L:
405 case GDK_Control_R:
406 case GDK_Shift_L:
407 case GDK_Shift_R:
408 case GDK_Meta_L: // Meta is when you press Shift+Alt
409 case GDK_Meta_R:
410 event_context->defaultMessageContext()->clear();
411 break;
412 default:
413 break;
414 }
415 break;
416 default:
417 break;
418 }
420 if (!ret) {
421 if (((SPEventContextClass *) parent_class)->root_handler) {
422 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
423 }
424 }
426 return ret;
427 }
429 static void sp_rect_drag(SPRectContext &rc, NR::Point const pt, guint state)
430 {
431 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
433 if (!rc.item) {
435 if (Inkscape::have_viable_layer(desktop, rc._message_context) == false) {
436 return;
437 }
439 /* Create object */
440 Inkscape::XML::Node *repr = sp_repr_new("svg:rect");
442 /* Set style */
443 sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.rect", false);
445 rc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
446 Inkscape::GC::release(repr);
447 rc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
448 rc.item->updateRepr();
449 }
451 NR::Rect const r = Inkscape::snap_rectangular_box(desktop, rc.item, pt, rc.center, state);
453 sp_rect_position_set(SP_RECT(rc.item), r.min()[NR::X], r.min()[NR::Y], r.dimensions()[NR::X], r.dimensions()[NR::Y]);
454 if ( rc.rx != 0.0 ) {
455 sp_rect_set_rx (SP_RECT(rc.item), TRUE, rc.rx);
456 }
457 if ( rc.ry != 0.0 ) {
458 if (rc.rx == 0.0)
459 sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, MIN(r.dimensions()[NR::X], r.dimensions()[NR::Y])/2));
460 else
461 sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, r.dimensions()[NR::Y]));
462 }
464 // status text
465 GString *xs = SP_PX_TO_METRIC_STRING(r.dimensions()[NR::X], desktop->namedview->getDefaultMetric());
466 GString *ys = SP_PX_TO_METRIC_STRING(r.dimensions()[NR::Y], desktop->namedview->getDefaultMetric());
467 rc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Rectangle</b>: %s × %s; with <b>Ctrl</b> to make square or integer-ratio rectangle; with <b>Shift</b> to draw around the starting point"), xs->str, ys->str);
468 g_string_free(xs, FALSE);
469 g_string_free(ys, FALSE);
470 }
472 static void sp_rect_finish(SPRectContext *rc)
473 {
474 rc->_message_context->clear();
476 if ( rc->item != NULL ) {
477 SPDesktop * dt;
479 dt = SP_EVENT_CONTEXT_DESKTOP(rc);
481 SP_OBJECT(rc->item)->updateRepr();
483 SP_DT_SELECTION(dt)->set(rc->item);
484 sp_document_done(SP_DT_DOCUMENT(dt));
486 rc->item = NULL;
487 }
488 }
490 /*
491 Local Variables:
492 mode:c++
493 c-file-style:"stroustrup"
494 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
495 indent-tabs-mode:nil
496 fill-column:99
497 End:
498 */
499 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :