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 "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"
  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_hscale.set_update_policy(Gtk::UPDATE_DELAYED);
  87     _opacity_adjustment.signal_value_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_opacityValueChanged));
  88
  89     show_all_children();
  90
  91     _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "activate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_activate), this );
  92     _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "deactivate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_deactivate), this );
  93 }
  94
  95 ObjectCompositeSettings::~ObjectCompositeSettings() {
  96     setSubject(NULL);
  97     g_signal_handler_disconnect(G_OBJECT(INKSCAPE), _desktop_activated);
  98 }
  99
 100 void ObjectCompositeSettings::setSubject(StyleSubject *subject) {
 101     _subject_changed.disconnect();
 102     if (subject) {
 103         _subject = subject;
 104         _subject_changed = _subject->connectChanged(sigc::mem_fun(*this, &ObjectCompositeSettings::_subjectChanged));
 105         _subject->setDesktop(SP_ACTIVE_DESKTOP);
 106     }
 107 }
 108
 109 void
 110 ObjectCompositeSettings::_blendBlurValueChanged()
 111 {
 112     if (!_subject) {
 113         return;
 114     }
 115
 116     SPDesktop *desktop = _subject->getDesktop();
 117     if (!desktop) {
 118         return;
 119     }
 120     SPDocument *document = sp_desktop_document (desktop);
 121
 122     if (_blocked)
 123         return;
 124     _blocked = true;
 125
 126     // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
 127     //sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
 128
 129     Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
 130     double radius;
 131     if (bbox) {
 132         double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];   // fixme: this is only half the perimeter, is that correct?
 133         radius = _fe_cb.get_blur_value() * perimeter / 400;
 134     } else {
 135         radius = 0;
 136     }
 137
 138     const Glib::ustring blendmode = _fe_cb.get_blend_mode();
 139
 140     //apply created filter to every selected item
 141     for (StyleSubject::iterator i = _subject->begin() ; i != _subject->end() ; ++i ) {
 142         if (!SP_IS_ITEM(*i)) {
 143             continue;
 144         }
 145
 146         SPItem * item = SP_ITEM(*i);
 147         SPStyle *style = SP_OBJECT_STYLE(item);
 148         g_assert(style != NULL);
 149
 150         if (blendmode != "normal") {
 151             SPFilter *filter = new_filter_simple_from_item(document, item, blendmode.c_str(), radius);
 152             sp_style_set_property_url(item, "filter", filter, false);
 153         } else {
 154             sp_style_set_property_url(item, "filter", NULL, false);
 155         }
 156
 157         if (radius == 0 && item->style->filter.set
 158             && filter_is_single_gaussian_blur(SP_FILTER(item->style->getFilter()))) {
 159             remove_filter(item, false);
 160         }
 161         else if (radius != 0) {
 162             SPFilter *filter = modify_filter_gaussian_blur_from_item(document, item, radius);
 163             sp_style_set_property_url(item, "filter", filter, false);
 164         }
 165
 166         //request update
 167         item->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
 168                                      SP_OBJECT_STYLE_MODIFIED_FLAG ));
 169     }
 170
 171     sp_document_maybe_done (document, _blur_tag.c_str(), _verb_code,
 172                             _("Change blur"));
 173
 174     // resume interruptibility
 175     //sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 176
 177     _blocked = false;
 178 }
 179
 180 void
 181 ObjectCompositeSettings::_opacityValueChanged()
 182 {
 183     if (!_subject) {
 184         return;
 185     }
 186
 187     SPDesktop *desktop = _subject->getDesktop();
 188     if (!desktop) {
 189         return;
 190     }
 191
 192     if (_blocked)
 193         return;
 194     _blocked = true;
 195
 196     // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
 197     // UPDATE: crash fixed in GTK+ 2.10.7 (bug 374378), remove this as soon as it's reasonably common
 198     // (though this only fixes the crash, not the multiple change events)
 199     //sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
 200
 201     SPCSSAttr *css = sp_repr_css_attr_new ();
 202
 203     Inkscape::CSSOStringStream os;
 204     os << CLAMP (_opacity_adjustment.get_value() / 100, 0.0, 1.0);
 205     sp_repr_css_set_property (css, "opacity", os.str().c_str());
 206
 207     _subject->setCSS(css);
 208
 209     sp_repr_css_attr_unref (css);
 210
 211     sp_document_maybe_done (sp_desktop_document (desktop), _opacity_tag.c_str(), _verb_code,
 212                             _("Change opacity"));
 213
 214     // resume interruptibility
 215     //sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 216
 217     _blocked = false;
 218 }
 219
 220 void
 221 ObjectCompositeSettings::_subjectChanged() {
 222     if (!_subject) {
 223         return;
 224     }
 225
 226     SPDesktop *desktop = _subject->getDesktop();
 227     if (!desktop) {
 228         return;
 229     }
 230
 231     if (_blocked)
 232         return;
 233     _blocked = true;
 234
 235     SPStyle *query = sp_style_new (sp_desktop_document(desktop));
 236     int result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
 237
 238     switch (result) {
 239         case QUERY_STYLE_NOTHING:
 240             _opacity_hbox.set_sensitive(false);
 241             // gtk_widget_set_sensitive (opa, FALSE);
 242             break;
 243         case QUERY_STYLE_SINGLE:
 244         case QUERY_STYLE_MULTIPLE_AVERAGED: // TODO: treat this slightly differently
 245         case QUERY_STYLE_MULTIPLE_SAME:
 246             _opacity_hbox.set_sensitive(true);
 247             _opacity_adjustment.set_value(100 * SP_SCALE24_TO_FLOAT(query->opacity.value));
 248             break;
 249     }
 250
 251     //query now for current filter mode and average blurring of selection
 252     const int blend_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLEND);
 253     switch(blend_result) {
 254         case QUERY_STYLE_NOTHING:
 255             _fe_cb.set_sensitive(false);
 256             break;
 257         case QUERY_STYLE_SINGLE:
 258         case QUERY_STYLE_MULTIPLE_SAME:
 259             _fe_cb.set_blend_mode(query->filter_blend_mode.value);
 260             _fe_cb.set_sensitive(true);
 261             break;
 262         case QUERY_STYLE_MULTIPLE_DIFFERENT:
 263             // TODO: set text
 264             _fe_cb.set_sensitive(false);
 265             break;
 266     }
 267
 268     if(blend_result == QUERY_STYLE_SINGLE || blend_result == QUERY_STYLE_MULTIPLE_SAME) {
 269         int blur_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLUR);
 270         switch (blur_result) {
 271             case QUERY_STYLE_NOTHING: //no blurring
 272                 _fe_cb.set_blur_sensitive(false);
 273                 break;
 274             case QUERY_STYLE_SINGLE:
 275             case QUERY_STYLE_MULTIPLE_AVERAGED:
 276             case QUERY_STYLE_MULTIPLE_SAME:
 277                 Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
 278                 if (bbox) {
 279                     double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];   // fixme: this is only half the perimeter, is that correct?
 280                     _fe_cb.set_blur_sensitive(true);
 281                     //update blur widget value
 282                     float radius = query->filter_gaussianBlur_deviation.value;
 283                     float percent = radius * 400 / perimeter; // so that for a square, 100% == half side
 284                     _fe_cb.set_blur_value(percent);
 285                 }
 286                 break;
 287         }
 288     }
 289
 290     sp_style_unref(query);
 291
 292     _blocked = false;
 293 }
 294
 295 }
 296 }
 297 }
 298
 299 /*
 300   Local Variables:
 301   mode:c++
 302   c-file-style:"stroustrup"
 303   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 304   indent-tabs-mode:nil
 305   fill-column:99
 306   End:
 307 */
 308 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :