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  *
   9  * Copyright (C) 2004--2008 Authors
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #include <glibmm/i18n.h>
  15
  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 "inkscape-stock.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/widget/object-composite-settings.h"
  30 #include "display/sp-canvas.h"
  31
  32 namespace Inkscape {
  33 namespace UI {
  34 namespace Widget {
  35
  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 }
  45
  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 }
  55
  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));
  77
  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));
  87
  88     show_all_children();
  89
  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 }
  93
  94 ObjectCompositeSettings::~ObjectCompositeSettings() {
  95     setSubject(NULL);
  96     g_signal_handler_disconnect(G_OBJECT(INKSCAPE), _desktop_activated);
  97 }
  98
  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 }
 107
 108 void
 109 ObjectCompositeSettings::_blendBlurValueChanged()
 110 {
 111     if (!_subject) {
 112         return;
 113     }
 114
 115     SPDesktop *desktop = _subject->getDesktop();
 116     if (!desktop) {
 117         return;
 118     }
 119     SPDocument *document = sp_desktop_document (desktop);
 120
 121     if (_blocked)
 122         return;
 123     _blocked = true;
 124
 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);
 127
 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     }
 136
 137     const Glib::ustring blendmode = _fe_cb.get_blend_mode();
 138
 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         }
 144
 145         SPItem * item = SP_ITEM(*i);
 146         SPStyle *style = SP_OBJECT_STYLE(item);
 147         g_assert(style != NULL);
 148
 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         }
 155
 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         }
 164
 165         //request update
 166         item->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
 167                                      SP_OBJECT_STYLE_MODIFIED_FLAG ));
 168     }
 169
 170     sp_document_maybe_done (document, _blur_tag.c_str(), _verb_code,
 171                             _("Change blur"));
 172
 173     // resume interruptibility
 174     sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 175
 176     _blocked = false;
 177 }
 178
 179 void
 180 ObjectCompositeSettings::_opacityValueChanged()
 181 {
 182     if (!_subject) {
 183         return;
 184     }
 185
 186     SPDesktop *desktop = _subject->getDesktop();
 187     if (!desktop) {
 188         return;
 189     }
 190
 191     if (_blocked)
 192         return;
 193     _blocked = true;
 194
 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);
 199
 200     SPCSSAttr *css = sp_repr_css_attr_new ();
 201
 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());
 205
 206     _subject->setCSS(css);
 207
 208     sp_repr_css_attr_unref (css);
 209
 210     sp_document_maybe_done (sp_desktop_document (desktop), _opacity_tag.c_str(), _verb_code,
 211                             _("Change opacity"));
 212
 213     // resume interruptibility
 214     sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 215
 216     _blocked = false;
 217 }
 218
 219 void
 220 ObjectCompositeSettings::_subjectChanged() {
 221     if (!_subject) {
 222         return;
 223     }
 224
 225     SPDesktop *desktop = _subject->getDesktop();
 226     if (!desktop) {
 227         return;
 228     }
 229
 230     if (_blocked)
 231         return;
 232     _blocked = true;
 233
 234     SPStyle *query = sp_style_new (sp_desktop_document(desktop));
 235     int result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
 236
 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     }
 249
 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     }
 266
 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     }
 288
 289     sp_style_unref(query);
 290
 291     _blocked = false;
 292 }
 293
 294 }
 295 }
 296 }
 297
 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 :