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  *
   8  * Copyright (C) 2004--2007 Authors
   9  *
  10  * Released under GNU GPL, read the file 'COPYING' for more information
  11  */
  12
  13 #include <glibmm/i18n.h>
  14
  15 #include "desktop-handles.h"
  16 #include "desktop-style.h"
  17 #include "document.h"
  18 #include "filter-chemistry.h"
  19 #include "inkscape.h"
  20 #include "inkscape-stock.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/widget/object-composite-settings.h"
  29 #include "display/sp-canvas.h"
  30
  31 namespace Inkscape {
  32 namespace UI {
  33 namespace Widget {
  34
  35 void ObjectCompositeSettings::_on_desktop_switch(
  36     Inkscape::Application */*application*/,
  37     SPDesktop *desktop,
  38     ObjectCompositeSettings *w
  39 ) {
  40     if (w->_subject) {
  41         w->_subject->setDesktop(desktop);
  42     }
  43 }
  44
  45 ObjectCompositeSettings::ObjectCompositeSettings(unsigned int verb_code, char const *history_prefix, int flags)
  46 : _verb_code(verb_code),
  47   _blur_tag(Glib::ustring(history_prefix) + ":blur"),
  48   _opacity_tag(Glib::ustring(history_prefix) + ":opacity"),
  49   _opacity_vbox(false, 0),
  50   _opacity_label_box(false, 0),
  51   _opacity_label(_("Opacity, %"), 0.0, 1.0, true),
  52   _opacity_adjustment(100.0, 0.0, 100.0, 1.0, 1.0, 0.0),
  53   _opacity_hscale(_opacity_adjustment),
  54   _opacity_spin_button(_opacity_adjustment, 0.01, 1),
  55   _fe_cb(flags),
  56   _fe_vbox(false, 0),
  57   _fe_alignment(1, 1, 1, 1),
  58   _blocked(false)
  59 {
  60     // Filter Effects
  61     pack_start(_fe_vbox, false, false, 2);
  62     _fe_alignment.set_padding(0, 0, 4, 0);
  63     _fe_alignment.add(_fe_cb);
  64     _fe_vbox.pack_start(_fe_alignment, false, false, 0);
  65     _fe_cb.signal_blend_blur_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_blendBlurValueChanged));
  66
  67     // Opacity
  68     pack_start(_opacity_vbox, false, false, 2);
  69     _opacity_label_box.pack_start(_opacity_label, false, false, 4);
  70     _opacity_vbox.pack_start(_opacity_label_box, false, false, 0);
  71     _opacity_vbox.pack_start(_opacity_hbox, false, false, 0);
  72     _opacity_hbox.pack_start(_opacity_hscale, true, true, 4);
  73     _opacity_hbox.pack_start(_opacity_spin_button, false, false, 0);
  74     _opacity_hscale.set_draw_value(false);
  75     _opacity_adjustment.signal_value_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_opacityValueChanged));
  76
  77     show_all_children();
  78
  79     _desktop_activated = g_signal_connect ( G_OBJECT (INKSCAPE), "activate_desktop", G_CALLBACK (&ObjectCompositeSettings::_on_desktop_switch), this );
  80 }
  81
  82 ObjectCompositeSettings::~ObjectCompositeSettings() {
  83     setSubject(NULL);
  84     g_signal_handler_disconnect(G_OBJECT(INKSCAPE), _desktop_activated);
  85 }
  86
  87 void ObjectCompositeSettings::setSubject(StyleSubject *subject) {
  88     _subject_changed.disconnect();
  89     if (subject) {
  90         _subject = subject;
  91         _subject_changed = _subject->connectChanged(sigc::mem_fun(*this, &ObjectCompositeSettings::_subjectChanged));
  92         _subject->setDesktop(SP_ACTIVE_DESKTOP);
  93     }
  94 }
  95
  96 void
  97 ObjectCompositeSettings::_blendBlurValueChanged()
  98 {
  99     if (!_subject) {
 100         return;
 101     }
 102
 103     SPDesktop *desktop = _subject->getDesktop();
 104     if (!desktop) {
 105         return;
 106     }
 107
 108     if (_blocked)
 109         return;
 110     _blocked = true;
 111
 112     // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
 113     sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
 114
 115     NR::Maybe<NR::Rect> bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
 116     double radius;
 117     if (bbox) {
 118         double perimeter = bbox->extent(NR::X) + bbox->extent(NR::Y);
 119         radius = _fe_cb.get_blur_value() * perimeter / 400;
 120     } else {
 121         radius = 0;
 122     }
 123
 124     const Glib::ustring blendmode = _fe_cb.get_blend_mode();
 125
 126     SPFilter *filter = 0;
 127     const bool remfilter = (blendmode == "normal" && radius == 0) || (blendmode == "filter" && !filter);
 128
 129     if(blendmode != "filter" || filter) {
 130         SPDocument *document = sp_desktop_document (desktop);
 131
 132         //apply created filter to every selected item
 133         for (StyleSubject::iterator i = _subject->begin() ; i != _subject->end() ; ++i ) {
 134             if (!SP_IS_ITEM(*i)) {
 135                 continue;
 136             }
 137
 138             SPItem * item = SP_ITEM(*i);
 139             SPStyle *style = SP_OBJECT_STYLE(item);
 140             g_assert(style != NULL);
 141
 142             if(remfilter) {
 143                 remove_filter (item, false);
 144             }
 145             else {
 146                 if(blendmode != "filter")
 147                     filter = new_filter_simple_from_item(document, item, blendmode.c_str(), radius);
 148                 sp_style_set_property_url (SP_OBJECT(item), "filter", SP_OBJECT(filter), false);
 149             }
 150
 151             //request update
 152             SP_OBJECT(item)->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
 153                                                     SP_OBJECT_STYLE_MODIFIED_FLAG ));
 154         }
 155     }
 156
 157     sp_document_maybe_done (sp_desktop_document (desktop), _blur_tag.c_str(), _verb_code, _("Change blur"));
 158
 159     // resume interruptibility
 160     sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 161
 162     _blocked = false;
 163 }
 164
 165 void
 166 ObjectCompositeSettings::_opacityValueChanged()
 167 {
 168     if (!_subject) {
 169         return;
 170     }
 171
 172     SPDesktop *desktop = _subject->getDesktop();
 173     if (!desktop) {
 174         return;
 175     }
 176
 177     if (_blocked)
 178         return;
 179     _blocked = true;
 180
 181     // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
 182     // UPDATE: crash fixed in GTK+ 2.10.7 (bug 374378), remove this as soon as it's reasonably common
 183     // (though this only fixes the crash, not the multiple change events)
 184     sp_canvas_force_full_redraw_after_interruptions(sp_desktop_canvas(desktop), 0);
 185
 186     SPCSSAttr *css = sp_repr_css_attr_new ();
 187
 188     Inkscape::CSSOStringStream os;
 189     os << CLAMP (_opacity_adjustment.get_value() / 100, 0.0, 1.0);
 190     sp_repr_css_set_property (css, "opacity", os.str().c_str());
 191
 192     _subject->setCSS(css);
 193
 194     sp_repr_css_attr_unref (css);
 195
 196     sp_document_maybe_done (sp_desktop_document (desktop), _opacity_tag.c_str(), _verb_code,
 197                             _("Change opacity"));
 198
 199     // resume interruptibility
 200     sp_canvas_end_forced_full_redraws(sp_desktop_canvas(desktop));
 201
 202     _blocked = false;
 203 }
 204
 205 void
 206 ObjectCompositeSettings::_subjectChanged() {
 207     if (!_subject) {
 208         return;
 209     }
 210
 211     SPDesktop *desktop = _subject->getDesktop();
 212     if (!desktop) {
 213         return;
 214     }
 215
 216     if (_blocked)
 217         return;
 218     _blocked = true;
 219
 220     SPStyle *query = sp_style_new (sp_desktop_document(desktop));
 221     int result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
 222
 223     switch (result) {
 224         case QUERY_STYLE_NOTHING:
 225             _opacity_hbox.set_sensitive(false);
 226             // gtk_widget_set_sensitive (opa, FALSE);
 227             break;
 228         case QUERY_STYLE_SINGLE:
 229         case QUERY_STYLE_MULTIPLE_AVERAGED: // TODO: treat this slightly differently
 230         case QUERY_STYLE_MULTIPLE_SAME:
 231             _opacity_hbox.set_sensitive(true);
 232             _opacity_adjustment.set_value(100 * SP_SCALE24_TO_FLOAT(query->opacity.value));
 233             break;
 234     }
 235
 236     //query now for current filter mode and average blurring of selection
 237     const int blend_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLEND);
 238     switch(blend_result) {
 239         case QUERY_STYLE_NOTHING:
 240             _fe_cb.set_sensitive(false);
 241             break;
 242         case QUERY_STYLE_SINGLE:
 243         case QUERY_STYLE_MULTIPLE_SAME:
 244             _fe_cb.set_blend_mode(query->filter_blend_mode.value);
 245             _fe_cb.set_sensitive(true);
 246             break;
 247         case QUERY_STYLE_MULTIPLE_DIFFERENT:
 248             // TODO: set text
 249             _fe_cb.set_sensitive(false);
 250             break;
 251     }
 252
 253     if(blend_result == QUERY_STYLE_SINGLE || blend_result == QUERY_STYLE_MULTIPLE_SAME) {
 254         int blur_result = _subject->queryStyle(query, QUERY_STYLE_PROPERTY_BLUR);
 255         switch (blur_result) {
 256             case QUERY_STYLE_NOTHING: //no blurring
 257                 _fe_cb.set_blur_sensitive(false);
 258                 break;
 259             case QUERY_STYLE_SINGLE:
 260             case QUERY_STYLE_MULTIPLE_AVERAGED:
 261             case QUERY_STYLE_MULTIPLE_SAME:
 262                 NR::Maybe<NR::Rect> bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
 263                 if (bbox) {
 264                     double perimeter = bbox->extent(NR::X) + bbox->extent(NR::Y);
 265                     _fe_cb.set_blur_sensitive(true);
 266                     //update blur widget value
 267                     float radius = query->filter_gaussianBlur_deviation.value;
 268                     float percent = radius * 400 / perimeter; // so that for a square, 100% == half side
 269                     _fe_cb.set_blur_value(percent);
 270                 }
 271                 break;
 272         }
 273     }
 274
 275     sp_style_unref(query);
 276
 277     _blocked = false;
 278 }
 279
 280 }
 281 }
 282 }
 283
 284 /*
 285   Local Variables:
 286   mode:c++
 287   c-file-style:"stroustrup"
 288   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 289   indent-tabs-mode:nil
 290   fill-column:99
 291   End:
 292 */
 293 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :