src/ui/dialog/livepatheffect-editor.cpp

   1 /**
   2  * \brief LivePathEffect dialog
   3  *
   4  * Authors:
   5  *   Johan Engelen <j.b.c.engelen@utwente.nl>
   6  *
   7  * Copyright (C) 2007 Author
   8  *
   9  * Released under GNU GPL.  Read the file 'COPYING' for more information.
  10  */
  11
  12 #ifdef HAVE_CONFIG_H
  13 # include <config.h>
  14 #endif
  15
  16 #include <glibmm/i18n.h>
  17 #include "livepatheffect-editor.h"
  18 #include "verbs.h"
  19 #include "selection.h"
  20 #include "sp-shape.h"
  21 #include "sp-path.h"
  22 #include "live_effects/effect.h"
  23 #include "live_effects/lpeobject.h"
  24 #include "gtkmm/widget.h"
  25 #include <vector>
  26 #include "inkscape.h"
  27 #include "desktop-handles.h"
  28 #include "desktop.h"
  29 #include "document-private.h"
  30 #include "xml/node.h"
  31 #include "xml/document.h"
  32
  33 namespace Inkscape {
  34 class Application;
  35
  36 namespace UI {
  37 namespace Dialog {
  38
  39
  40 /*####################
  41  * Callback functions
  42  */
  43 static void lpeeditor_selection_changed (Inkscape::Selection * selection, gpointer data)
  44 {
  45     LivePathEffectEditor *lpeeditor = static_cast<LivePathEffectEditor *>(data);
  46     lpeeditor->onSelectionChanged(selection);
  47 }
  48
  49 static void lpeeditor_selection_modified( Inkscape::Selection *selection, guint /*flags*/, gpointer data )
  50 {
  51     lpeeditor_selection_changed (selection, data);
  52 }
  53
  54
  55 static void lpeeditor_desktop_change(Inkscape::Application*, SPDesktop* desktop, void *data)
  56 {
  57     if (!desktop) {
  58         return;
  59     }
  60     LivePathEffectEditor* editor = reinterpret_cast<LivePathEffectEditor*>(data);
  61     editor->setDesktop(desktop);
  62 }
  63
  64
  65 /*#######################
  66  * LivePathEffectEditor
  67  */
  68
  69 LivePathEffectEditor::LivePathEffectEditor()
  70     : UI::Widget::Panel("", "dialogs.livepatheffect", SP_VERB_DIALOG_LIVE_PATH_EFFECT),
  71       combo_effecttype(Inkscape::LivePathEffect::LPETypeConverter),
  72       button_apply(_("_Apply"), _("Apply chosen effect to selection")),
  73       button_remove(_("_Remove"), _("Remove effect from selection")),
  74       effectwidget(NULL),
  75       explain_label("", Gtk::ALIGN_CENTER),
  76       effectapplication_frame(_("Apply new effect")),
  77       effectcontrol_frame(_("Current effect")),
  78       current_desktop(NULL)
  79 {
  80     Gtk::Box *contents = _getContents();
  81     contents->set_spacing(4);
  82
  83     effectapplication_hbox.set_spacing(4);
  84     effectcontrol_vbox.set_spacing(4);
  85
  86     effectapplication_hbox.pack_start(combo_effecttype, true, true);
  87     effectapplication_hbox.pack_start(button_apply, true, true);
  88     effectapplication_frame.add(effectapplication_hbox);
  89
  90     effectcontrol_vbox.pack_start(explain_label, true, true);
  91     effectcontrol_vbox.pack_end(button_remove, true, true);
  92     effectcontrol_frame.add(effectcontrol_vbox);
  93
  94     contents->pack_start(effectapplication_frame, true, true);
  95     contents->pack_start(effectcontrol_frame, true, true);
  96
  97     // connect callback functions to buttons
  98     button_apply.signal_clicked().connect(sigc::mem_fun(*this, &LivePathEffectEditor::onApply));
  99     button_remove.signal_clicked().connect(sigc::mem_fun(*this, &LivePathEffectEditor::onRemove));
 100
 101     // connect callback functions to changes in selected desktop.
 102     g_signal_connect( G_OBJECT(INKSCAPE), "activate_desktop",
 103                        G_CALLBACK(lpeeditor_desktop_change), this);
 104
 105     g_signal_connect( G_OBJECT(INKSCAPE), "deactivate_desktop",
 106                        G_CALLBACK(lpeeditor_desktop_change), this);
 107
 108     setDesktop(SP_ACTIVE_DESKTOP);
 109     show_all_children();
 110
 111     button_remove.hide();
 112 }
 113
 114 LivePathEffectEditor::~LivePathEffectEditor()
 115 {
 116     if (effectwidget) {
 117         effectcontrol_vbox.remove(*effectwidget);
 118         effectwidget = NULL;
 119     }
 120
 121     if (current_desktop) {
 122         selection_changed_connection.disconnect();
 123         selection_modified_connection.disconnect();
 124     }
 125 }
 126
 127 void
 128 LivePathEffectEditor::showParams(LivePathEffect::Effect* effect)
 129 {
 130     if (effectwidget) {
 131         effectcontrol_vbox.remove(*effectwidget);
 132         effectwidget = NULL;
 133     }
 134
 135     explain_label.set_markup("<b>" + effect->getName() + "</b>");
 136     effectwidget = effect->getWidget();
 137     if (effectwidget) {
 138         effectcontrol_vbox.pack_start(*effectwidget, true, true);
 139     }
 140     button_remove.show();
 141
 142     effectcontrol_vbox.show_all_children();
 143     // fixme: do resizing of dialog
 144 }
 145
 146 void
 147 LivePathEffectEditor::showText(Glib::ustring const &str)
 148 {
 149     if (effectwidget) {
 150         effectcontrol_vbox.remove(*effectwidget);
 151         effectwidget = NULL;
 152     }
 153
 154     explain_label.set_label(str);
 155     button_remove.hide();
 156
 157     // fixme: do resizing of dialog ?
 158 }
 159
 160 void
 161 LivePathEffectEditor::set_sensitize_all(bool sensitive)
 162 {
 163     combo_effecttype.set_sensitive(sensitive);
 164     button_apply.set_sensitive(sensitive);
 165     button_remove.set_sensitive(sensitive);
 166 }
 167
 168 void
 169 LivePathEffectEditor::onSelectionChanged(Inkscape::Selection *sel)
 170 {
 171     if ( sel && !sel->isEmpty() ) {
 172         SPItem *item = sel->singleItem();
 173         if ( item ) {
 174             if ( SP_IS_SHAPE(item) ) {
 175                 SPShape *shape = SP_SHAPE(item);
 176                 LivePathEffectObject *lpeobj = sp_shape_get_livepatheffectobject(shape);
 177                 set_sensitize_all(true);
 178                 if (lpeobj) {
 179                     if (lpeobj->lpe) {
 180                         showParams(lpeobj->lpe);
 181                     } else {
 182                         showText(_("Unknown effect is applied"));
 183                     }
 184                 } else {
 185                     showText(_("No effect applied"));
 186                     button_remove.set_sensitive(false);
 187                 }
 188             } else {
 189                 showText(_("Item is not a shape or path"));
 190                 set_sensitize_all(false);
 191             }
 192         } else {
 193             showText(_("Only one item can be selected"));
 194             set_sensitize_all(false);
 195         }
 196     } else {
 197         showText(_("Empty selection"));
 198         set_sensitize_all(false);
 199     }
 200 }
 201
 202 void
 203 LivePathEffectEditor::setDesktop(SPDesktop *desktop)
 204 {
 205
 206     if ( desktop == current_desktop ) {
 207         return;
 208     }
 209
 210     if (current_desktop) {
 211         selection_changed_connection.disconnect();
 212         selection_modified_connection.disconnect();
 213     }
 214
 215     current_desktop = desktop;
 216     if (desktop) {
 217         Inkscape::Selection *selection = sp_desktop_selection(desktop);
 218         selection_changed_connection = selection->connectChanged(
 219             sigc::bind (sigc::ptr_fun(&lpeeditor_selection_changed), this ) );
 220         selection_modified_connection = selection->connectModified(
 221             sigc::bind (sigc::ptr_fun(&lpeeditor_selection_modified), this ) );
 222
 223         onSelectionChanged(selection);
 224     } else {
 225         onSelectionChanged(NULL);
 226     }
 227 }
 228
 229
 230
 231
 232 /*########################################################################
 233 # BUTTON CLICK HANDLERS    (callbacks)
 234 ########################################################################*/
 235
 236 // TODO:  factor out the effect applying code which can be called from anywhere. (selection-chemistry.cpp also needs it)
 237
 238 void
 239 LivePathEffectEditor::onApply()
 240 {
 241     Inkscape::Selection *sel = _getSelection();
 242     if ( sel && !sel->isEmpty() ) {
 243         SPItem *item = sel->singleItem();
 244         if ( item && SP_IS_SHAPE(item) ) {
 245             SPDocument *doc = current_desktop->doc();
 246
 247             const Util::EnumData<LivePathEffect::EffectType>* data = combo_effecttype.get_active_data();
 248             if (!data) return;
 249
 250             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 251             Inkscape::XML::Node *repr = xml_doc->createElement("inkscape:path-effect");
 252             repr->setAttribute("effect", data->key.c_str() );
 253
 254             SP_OBJECT_REPR(SP_DOCUMENT_DEFS(doc))->addChild(repr, NULL); // adds to <defs> and assigns the 'id' attribute
 255             const gchar * repr_id = repr->attribute("id");
 256             Inkscape::GC::release(repr);
 257
 258             gchar *href = g_strdup_printf("#%s", repr_id);
 259             sp_shape_set_path_effect(SP_SHAPE(item), href);
 260             g_free(href);
 261
 262             // make sure there is an original-d for paths!!!
 263             if ( SP_IS_PATH(item) ) {
 264                 Inkscape::XML::Node *pathrepr = SP_OBJECT_REPR(item);
 265                 if ( ! pathrepr->attribute("inkscape:original-d") ) {
 266                     pathrepr->setAttribute("inkscape:original-d", pathrepr->attribute("d"));
 267                 }
 268             }
 269
 270             LivePathEffectObject *lpeobj = sp_shape_get_livepatheffectobject(SP_SHAPE(item));
 271             if (lpeobj && lpeobj->lpe) {
 272                 lpeobj->lpe->resetDefaults(item);
 273             }
 274
 275             sp_document_done(doc, SP_VERB_DIALOG_LIVE_PATH_EFFECT,
 276                              _("Create and apply path effect"));
 277         }
 278     }
 279 }
 280
 281 void
 282 LivePathEffectEditor::onRemove()
 283 {
 284     Inkscape::Selection *sel = _getSelection();
 285     if ( sel && !sel->isEmpty() ) {
 286         SPItem *item = sel->singleItem();
 287         if ( item && SP_IS_SHAPE(item) ) {
 288             sp_shape_remove_path_effect(SP_SHAPE(item));
 289             sp_document_done ( sp_desktop_document (current_desktop), SP_VERB_DIALOG_LIVE_PATH_EFFECT,
 290                                _("Remove path effect") );
 291         }
 292     }
 293 }
 294
 295
 296
 297 } // namespace Dialog
 298 } // namespace UI
 299 } // namespace Inkscape
 300