src/ui/widget/object-composite-settings.cpp

   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  *   Abhishek Sharma
   9  *
  10  * Copyright (C) 2004--2008 Authors
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #include <glibmm/i18n.h>
  16
  17 #include "desktop-handles.h"
  18 #include "desktop-style.h"
  19 #include "document.h"
  20 #include "filter-chemistry.h"
  21 #include "inkscape.h"
  22 #include "selection.h"
  23 #include "style.h"
  24 #include "sp-item.h"
  25 #include "svg/css-ostringstream.h"
  26 #include "verbs.h"
  27 #include "xml/repr.h"
  28 #include "widgets/icon.h"
  29 #include "ui/icon-names.h"
  30 #include "ui/widget/object-composite-settings.h"
  31 #include "display/sp-canvas.h"
  32
  33 namespace Inkscape {
  34 namespace UI {
  35 namespace Widget {
  36
  37 void ObjectCompositeSettings::_on_desktop_activate(
  38     Inkscape::Application */*application*/,
  39     SPDesktop *desktop,
  40     ObjectCompositeSettings *w
  41 ) {
  42     if (w->_subject) {
  43         w->_subject->setDesktop(desktop);
  44     }
  45 }
  46
  47 void ObjectCompositeSettings::_on_desktop_deactivate(
  48     Inkscape::Application */*application*/,
  49     SPDesktop */*desktop*/,
  50     ObjectCompositeSettings *w
  51 ) {
  52     if (w->_subject) {
  53         w->_subject->setDesktop(NULL);
  54     }
  55 }
  56
  57 ObjectCompositeSettings::ObjectCompositeSettings(unsigned int verb_code, char const *history_prefix, int flags)
  58 : _verb_code(verb_code),
  59   _blur_tag(Glib::ustring(history_prefix) + ":blur"),
  60   _opacity_tag(Glib::ustring(history_prefix) + ":opacity"),
  61   _opacity_vbox(false, 0),
  62   _opacity_label_box(false, 0),
  63   _opacity_label(_("Opacity (%):"), 0.0, 1.0, true),
  64   _opacity_adjustment(100.0, 0.0, 100.0, 1.0, 1.0, 0.0),
  65   _opacity_hscale(_opacity_adjustment),
  66   _opacity_spin_button(_opacity_adjustment, 0.01, 1),
  67   _fe_cb(flags),
  68   _fe_vbox(false, 0),
  69   _fe_alignment(1, 1, 1, 1),
  70   _blocked(false)
  71 {
  72     // Filter Effects
  73     pack_start(_fe_vbox, false, false, 2);
  74     _fe_alignment.set_padding(0, 0, 4, 0);
  75     _fe_alignment.add(_fe_cb);
  76     _fe_vbox.pack_start(_fe_alignment, false, false, 0);
  77     _fe_cb.signal_blend_blur_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_blendBlurValueChanged));
  78
  79     // Opacity
  80     pack_start(_opacity_vbox, false, false, 2);
  81     _opacity_label_box.pack_start(_opacity_label, false, false, 4);
  82     _opacity_vbox.pack_start(_opacity_label_box, false, false, 0);
  83     _opacity_vbox.pack_start(_opacity_hbox, false, false, 0);
  84     _opacity_hbox.pack_start(_opacity_hscale, true, true, 4);
  85     _opacity_hbox.pack_start(_opacity_spin_button, false, false, 0);
  86     _opacity_hscale.set_draw_value(false);
  87     _opacity_hscale.set_update_policy(Gtk::UPDATE_DELAYED);
  88     _opacity_adjustment.signal_value_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_opacityValueChanged));
  89
  90     show_all_children();
  91
  92     _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "activate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_activate), this );
  93     _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "deactivate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_deactivate), this );
  94 }
  95
  96 ObjectCompositeSettings::~ObjectCompositeSettings() {
  97     setSubject(NULL);
  98     g_signal_handler_disconnect(G_OBJECT(INKSCAPE), _desktop_activated);
  99 }
 100
 101 void ObjectCompositeSettings::setSubject(StyleSubject *subject) {
 102     _subject_changed.disconnect();
 103     if (subject) {
 104         _subject = subject;
 105         _subject_changed = _subject->connectChanged(sigc::mem_fun(*this, &ObjectCompositeSettings::_subjectChanged));
 106         _subject->setDesktop(SP_ACTIVE_DESKTOP);
 107     }
 108 }
 109
 110 void
 111 ObjectCompositeSettings::_blendBlurValueChanged()
 112 {
 113     if (!_subject) {
 114         return;
 115     }
 116
 117     SPDesktop *desktop = _subject->getDesktop();
 118     if (!desktop) {
 119         return;
 120     }
 121     SPDocument *document = sp_desktop_document (desktop);
 122
 123     if (_blocked)
 124         return;
 125     _blocked = true;
 126
 127     // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
 128     //sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
 129
 130     Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
 131     double radius;
 132     if (bbox) {
 133         double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];   // fixme: this is only half the perimeter, is that correct?
 134         radius = _fe_cb.get_blur_value() * perimeter / 400;
 135     } else {
 136         radius = 0;
 137     }
 138
 139     const Glib::ustring blendmode = _fe_cb.get_blend_mode();
 140
 141     //apply created filter to every selected item
 142     for (StyleSubject::iterator i = _subject->begin() ; i != _subject->end() ; ++i ) {
 143         if (!SP_IS_ITEM(*i)) {
 144             continue;
 145         }
 146
 147         SPItem * item = SP_ITEM(*i);
 148         SPStyle *style = SP_OBJECT_STYLE(item);
 149         g_assert(style != NULL);
 150
 151         if (blendmode != "normal") {
 152             SPFilter *filter = new_filter_simple_from_item(document, item, blendmode.c_str(), radius);
 153             sp_style_set_property_url(item, "filter", filter, false);
 154         } else {
 155             sp_style_set_property_url(item, "filter", NULL, false);
 156         }
 157
 158         if (radius == 0 && item->style->filter.set
 159             && filter_is_single_gaussian_blur(SP_FILTER(item->style->getFilter()))) {
 160             remove_filter(item, false);
 161         }
 162         else if (radius != 0) {
 163             SPFilter *filter = modify_filter_gaussian_blur_from_item(document, item, radius);
 164             sp_style_set_property_url(item, "filter", filter, false);
 165         }
 166
 167         //request update
 168         item->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
 169                                      SP_OBJECT_STYLE_MODIFIED_FLAG ));
 170     }
 171
 172     DocumentUndo::maybeDone(document, _blur_tag.c_str(), _verb_code,
 173                             _("Change blur"));
 174
 175     // resume interruptibility
 176     //sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 177
 178     _blocked = false;
 179 }
 180
 181 void
 182 ObjectCompositeSettings::_opacityValueChanged()
 183 {
 184     if (!_subject) {
 185         return;
 186     }
 187
 188     SPDesktop *desktop = _subject->getDesktop();
 189     if (!desktop) {
 190         return;
 191     }
 192
 193     if (_blocked)
 194         return;
 195     _blocked = true;
 196
 197     // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
 198     // UPDATE: crash fixed in GTK+ 2.10.7 (bug 374378), remove this as soon as it's reasonably common
 199     // (though this only fixes the crash, not the multiple change events)
 200     //sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
 201
 202     SPCSSAttr *css = sp_repr_css_attr_new ();
 203
 204     Inkscape::CSSOStringStream os;
 205     os << CLAMP (_opacity_adjustment.get_value() / 100, 0.0, 1.0);
 206     sp_repr_css_set_property (css, "opacity", os.str().c_str());
 207
 208     _subject->setCSS(css);
 209
 210     sp_repr_css_attr_unref (css);
 211
 212     DocumentUndo::maybeDone(sp_desktop_document (desktop), _opacity_tag.c_str(), _verb_code,
 213                             _("Change opacity"));
 214
 215     // resume interruptibility
 216     //sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 217
 218     _blocked = false;
 219 }
 220
 221 void
 222 ObjectCompositeSettings::_subjectChanged() {
 223     if (!_subject) {
 224         return;
 225     }
 226
 227     SPDesktop *desktop = _subject->getDesktop();
 228     if (!desktop) {
 229         return;
 230     }
 231
 232     if (_blocked)
 233         return;
 234     _blocked = true;
 235
 236     SPStyle *query = sp_style_new (sp_desktop_document(desktop));
 237     int result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
 238
 239     switch (result) {
 240         case QUERY_STYLE_NOTHING:
 241             _opacity_hbox.set_sensitive(false);
 242             // gtk_widget_set_sensitive (opa, FALSE);
 243             break;
 244         case QUERY_STYLE_SINGLE:
 245         case QUERY_STYLE_MULTIPLE_AVERAGED: // TODO: treat this slightly differently
 246         case QUERY_STYLE_MULTIPLE_SAME:
 247             _opacity_hbox.set_sensitive(true);
 248             _opacity_adjustment.set_value(100 * SP_SCALE24_TO_FLOAT(query->opacity.value));
 249             break;
 250     }
 251
 252     //query now for current filter mode and average blurring of selection
 253     const int blend_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLEND);
 254     switch(blend_result) {
 255         case QUERY_STYLE_NOTHING:
 256             _fe_cb.set_sensitive(false);
 257             break;
 258         case QUERY_STYLE_SINGLE:
 259         case QUERY_STYLE_MULTIPLE_SAME:
 260             _fe_cb.set_blend_mode(query->filter_blend_mode.value);
 261             _fe_cb.set_sensitive(true);
 262             break;
 263         case QUERY_STYLE_MULTIPLE_DIFFERENT:
 264             // TODO: set text
 265             _fe_cb.set_sensitive(false);
 266             break;
 267     }
 268
 269     if(blend_result == QUERY_STYLE_SINGLE || blend_result == QUERY_STYLE_MULTIPLE_SAME) {
 270         int blur_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLUR);
 271         switch (blur_result) {
 272             case QUERY_STYLE_NOTHING: //no blurring
 273                 _fe_cb.set_blur_sensitive(false);
 274                 break;
 275             case QUERY_STYLE_SINGLE:
 276             case QUERY_STYLE_MULTIPLE_AVERAGED:
 277             case QUERY_STYLE_MULTIPLE_SAME:
 278                 Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
 279                 if (bbox) {
 280                     double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];   // fixme: this is only half the perimeter, is that correct?
 281                     _fe_cb.set_blur_sensitive(true);
 282                     //update blur widget value
 283                     float radius = query->filter_gaussianBlur_deviation.value;
 284                     float percent = radius * 400 / perimeter; // so that for a square, 100% == half side
 285                     _fe_cb.set_blur_value(percent);
 286                 }
 287                 break;
 288         }
 289     }
 290
 291     sp_style_unref(query);
 292
 293     _blocked = false;
 294 }
 295
 296 }
 297 }
 298 }
 299
 300 /*
 301   Local Variables:
 302   mode:c++
 303   c-file-style:"stroustrup"
 304   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 305   indent-tabs-mode:nil
 306   fill-column:99
 307   End:
 308 */
 309 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :