1 /*
2 * A widget for controlling object compositing (filter, opacity, etc.)
3 *
4 * Authors:
5 * Bryce W. Harrington <bryce@bryceharrington.org>
6 * Gustav Broberg <broberg@kth.se>
7 * Niko Kiirala <niko@kiirala.com>
8 *
9 * Copyright (C) 2004--2008 Authors
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #include <glibmm/i18n.h>
16 #include "desktop-handles.h"
17 #include "desktop-style.h"
18 #include "document.h"
19 #include "filter-chemistry.h"
20 #include "inkscape.h"
21 #include "selection.h"
22 #include "style.h"
23 #include "sp-item.h"
24 #include "svg/css-ostringstream.h"
25 #include "verbs.h"
26 #include "xml/repr.h"
27 #include "widgets/icon.h"
28 #include "ui/icon-names.h"
29 #include "ui/widget/object-composite-settings.h"
30 #include "display/sp-canvas.h"
32 namespace Inkscape {
33 namespace UI {
34 namespace Widget {
36 void ObjectCompositeSettings::_on_desktop_activate(
37 Inkscape::Application */*application*/,
38 SPDesktop *desktop,
39 ObjectCompositeSettings *w
40 ) {
41 if (w->_subject) {
42 w->_subject->setDesktop(desktop);
43 }
44 }
46 void ObjectCompositeSettings::_on_desktop_deactivate(
47 Inkscape::Application */*application*/,
48 SPDesktop */*desktop*/,
49 ObjectCompositeSettings *w
50 ) {
51 if (w->_subject) {
52 w->_subject->setDesktop(NULL);
53 }
54 }
56 ObjectCompositeSettings::ObjectCompositeSettings(unsigned int verb_code, char const *history_prefix, int flags)
57 : _verb_code(verb_code),
58 _blur_tag(Glib::ustring(history_prefix) + ":blur"),
59 _opacity_tag(Glib::ustring(history_prefix) + ":opacity"),
60 _opacity_vbox(false, 0),
61 _opacity_label_box(false, 0),
62 _opacity_label(_("Opacity, %"), 0.0, 1.0, true),
63 _opacity_adjustment(100.0, 0.0, 100.0, 1.0, 1.0, 0.0),
64 _opacity_hscale(_opacity_adjustment),
65 _opacity_spin_button(_opacity_adjustment, 0.01, 1),
66 _fe_cb(flags),
67 _fe_vbox(false, 0),
68 _fe_alignment(1, 1, 1, 1),
69 _blocked(false)
70 {
71 // Filter Effects
72 pack_start(_fe_vbox, false, false, 2);
73 _fe_alignment.set_padding(0, 0, 4, 0);
74 _fe_alignment.add(_fe_cb);
75 _fe_vbox.pack_start(_fe_alignment, false, false, 0);
76 _fe_cb.signal_blend_blur_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_blendBlurValueChanged));
78 // Opacity
79 pack_start(_opacity_vbox, false, false, 2);
80 _opacity_label_box.pack_start(_opacity_label, false, false, 4);
81 _opacity_vbox.pack_start(_opacity_label_box, false, false, 0);
82 _opacity_vbox.pack_start(_opacity_hbox, false, false, 0);
83 _opacity_hbox.pack_start(_opacity_hscale, true, true, 4);
84 _opacity_hbox.pack_start(_opacity_spin_button, false, false, 0);
85 _opacity_hscale.set_draw_value(false);
86 _opacity_adjustment.signal_value_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_opacityValueChanged));
88 show_all_children();
90 _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "activate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_activate), this );
91 _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "deactivate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_deactivate), this );
92 }
94 ObjectCompositeSettings::~ObjectCompositeSettings() {
95 setSubject(NULL);
96 g_signal_handler_disconnect(G_OBJECT(INKSCAPE), _desktop_activated);
97 }
99 void ObjectCompositeSettings::setSubject(StyleSubject *subject) {
100 _subject_changed.disconnect();
101 if (subject) {
102 _subject = subject;
103 _subject_changed = _subject->connectChanged(sigc::mem_fun(*this, &ObjectCompositeSettings::_subjectChanged));
104 _subject->setDesktop(SP_ACTIVE_DESKTOP);
105 }
106 }
108 void
109 ObjectCompositeSettings::_blendBlurValueChanged()
110 {
111 if (!_subject) {
112 return;
113 }
115 SPDesktop *desktop = _subject->getDesktop();
116 if (!desktop) {
117 return;
118 }
119 SPDocument *document = sp_desktop_document (desktop);
121 if (_blocked)
122 return;
123 _blocked = true;
125 // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
126 sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
128 Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
129 double radius;
130 if (bbox) {
131 double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y]; // fixme: this is only half the perimeter, is that correct?
132 radius = _fe_cb.get_blur_value() * perimeter / 400;
133 } else {
134 radius = 0;
135 }
137 const Glib::ustring blendmode = _fe_cb.get_blend_mode();
139 //apply created filter to every selected item
140 for (StyleSubject::iterator i = _subject->begin() ; i != _subject->end() ; ++i ) {
141 if (!SP_IS_ITEM(*i)) {
142 continue;
143 }
145 SPItem * item = SP_ITEM(*i);
146 SPStyle *style = SP_OBJECT_STYLE(item);
147 g_assert(style != NULL);
149 if (blendmode != "normal") {
150 SPFilter *filter = new_filter_simple_from_item(document, item, blendmode.c_str(), radius);
151 sp_style_set_property_url(item, "filter", filter, false);
152 } else {
153 sp_style_set_property_url(item, "filter", NULL, false);
154 }
156 if (radius == 0 && item->style->filter.set
157 && filter_is_single_gaussian_blur(SP_FILTER(item->style->getFilter()))) {
158 remove_filter(item, false);
159 }
160 else if (radius != 0) {
161 SPFilter *filter = modify_filter_gaussian_blur_from_item(document, item, radius);
162 sp_style_set_property_url(item, "filter", filter, false);
163 }
165 //request update
166 item->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
167 SP_OBJECT_STYLE_MODIFIED_FLAG ));
168 }
170 sp_document_maybe_done (document, _blur_tag.c_str(), _verb_code,
171 _("Change blur"));
173 // resume interruptibility
174 sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
176 _blocked = false;
177 }
179 void
180 ObjectCompositeSettings::_opacityValueChanged()
181 {
182 if (!_subject) {
183 return;
184 }
186 SPDesktop *desktop = _subject->getDesktop();
187 if (!desktop) {
188 return;
189 }
191 if (_blocked)
192 return;
193 _blocked = true;
195 // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
196 // UPDATE: crash fixed in GTK+ 2.10.7 (bug 374378), remove this as soon as it's reasonably common
197 // (though this only fixes the crash, not the multiple change events)
198 sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
200 SPCSSAttr *css = sp_repr_css_attr_new ();
202 Inkscape::CSSOStringStream os;
203 os << CLAMP (_opacity_adjustment.get_value() / 100, 0.0, 1.0);
204 sp_repr_css_set_property (css, "opacity", os.str().c_str());
206 _subject->setCSS(css);
208 sp_repr_css_attr_unref (css);
210 sp_document_maybe_done (sp_desktop_document (desktop), _opacity_tag.c_str(), _verb_code,
211 _("Change opacity"));
213 // resume interruptibility
214 sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
216 _blocked = false;
217 }
219 void
220 ObjectCompositeSettings::_subjectChanged() {
221 if (!_subject) {
222 return;
223 }
225 SPDesktop *desktop = _subject->getDesktop();
226 if (!desktop) {
227 return;
228 }
230 if (_blocked)
231 return;
232 _blocked = true;
234 SPStyle *query = sp_style_new (sp_desktop_document(desktop));
235 int result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
237 switch (result) {
238 case QUERY_STYLE_NOTHING:
239 _opacity_hbox.set_sensitive(false);
240 // gtk_widget_set_sensitive (opa, FALSE);
241 break;
242 case QUERY_STYLE_SINGLE:
243 case QUERY_STYLE_MULTIPLE_AVERAGED: // TODO: treat this slightly differently
244 case QUERY_STYLE_MULTIPLE_SAME:
245 _opacity_hbox.set_sensitive(true);
246 _opacity_adjustment.set_value(100 * SP_SCALE24_TO_FLOAT(query->opacity.value));
247 break;
248 }
250 //query now for current filter mode and average blurring of selection
251 const int blend_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLEND);
252 switch(blend_result) {
253 case QUERY_STYLE_NOTHING:
254 _fe_cb.set_sensitive(false);
255 break;
256 case QUERY_STYLE_SINGLE:
257 case QUERY_STYLE_MULTIPLE_SAME:
258 _fe_cb.set_blend_mode(query->filter_blend_mode.value);
259 _fe_cb.set_sensitive(true);
260 break;
261 case QUERY_STYLE_MULTIPLE_DIFFERENT:
262 // TODO: set text
263 _fe_cb.set_sensitive(false);
264 break;
265 }
267 if(blend_result == QUERY_STYLE_SINGLE || blend_result == QUERY_STYLE_MULTIPLE_SAME) {
268 int blur_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLUR);
269 switch (blur_result) {
270 case QUERY_STYLE_NOTHING: //no blurring
271 _fe_cb.set_blur_sensitive(false);
272 break;
273 case QUERY_STYLE_SINGLE:
274 case QUERY_STYLE_MULTIPLE_AVERAGED:
275 case QUERY_STYLE_MULTIPLE_SAME:
276 Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
277 if (bbox) {
278 double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y]; // fixme: this is only half the perimeter, is that correct?
279 _fe_cb.set_blur_sensitive(true);
280 //update blur widget value
281 float radius = query->filter_gaussianBlur_deviation.value;
282 float percent = radius * 400 / perimeter; // so that for a square, 100% == half side
283 _fe_cb.set_blur_value(percent);
284 }
285 break;
286 }
287 }
289 sp_style_unref(query);
291 _blocked = false;
292 }
294 }
295 }
296 }
298 /*
299 Local Variables:
300 mode:c++
301 c-file-style:"stroustrup"
302 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
303 indent-tabs-mode:nil
304 fill-column:99
305 End:
306 */
307 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :