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