src/selcue.cpp

   1 #define __SELCUE_C__
   2
   3 /*
   4  * Helper object for showing selected items
   5  *
   6  * Authors:
   7  *   bulia byak <bulia@users.sf.net>
   8  *   Carl Hetherington <inkscape@carlh.net>
   9  *
  10  * Copyright (C) 2004 Authors
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #include <string.h>
  16
  17 #include "desktop-handles.h"
  18 #include "selection.h"
  19 #include "display/sp-canvas-util.h"
  20 #include "display/sodipodi-ctrl.h"
  21 #include "display/sodipodi-ctrlrect.h"
  22 #include "libnrtype/Layout-TNG.h"
  23 #include "text-editing.h"
  24 #include "sp-text.h"
  25 #include "sp-flowtext.h"
  26 #include "preferences.h"
  27 #include "selcue.h"
  28
  29 Inkscape::SelCue::SelCue(SPDesktop *desktop)
  30     : _desktop(desktop)
  31 {
  32     _selection = sp_desktop_selection(_desktop);
  33
  34     _sel_changed_connection = _selection->connectChanged(
  35         sigc::hide(sigc::mem_fun(*this, &Inkscape::SelCue::_newItemBboxes))
  36         );
  37
  38     _sel_modified_connection = _selection->connectModified(
  39         sigc::hide(sigc::hide(sigc::mem_fun(*this, &Inkscape::SelCue::_updateItemBboxes)))
  40         );
  41
  42     _updateItemBboxes();
  43 }
  44
  45 Inkscape::SelCue::~SelCue()
  46 {
  47     _sel_changed_connection.disconnect();
  48     _sel_modified_connection.disconnect();
  49
  50     for (std::vector<SPCanvasItem*>::iterator i = _item_bboxes.begin(); i != _item_bboxes.end(); i++) {
  51         gtk_object_destroy(*i);
  52     }
  53     _item_bboxes.clear();
  54
  55     for (std::vector<SPCanvasItem*>::iterator i = _text_baselines.begin(); i != _text_baselines.end(); i++) {
  56         gtk_object_destroy(*i);
  57     }
  58     _text_baselines.clear();
  59 }
  60
  61 void Inkscape::SelCue::_updateItemBboxes()
  62 {
  63     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
  64     gint mode = prefs->getInt("/options/selcue/value", MARK);
  65     if (mode == NONE) {
  66         return;
  67     }
  68
  69     g_return_if_fail(_selection != NULL);
  70
  71     int prefs_bbox = prefs->getBool("/tools/bounding_box");
  72     SPItem::BBoxType bbox_type = !prefs_bbox ?
  73         SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
  74
  75     GSList const *items = _selection->itemList();
  76     if (_item_bboxes.size() != g_slist_length((GSList *) items)) {
  77         _newItemBboxes();
  78         return;
  79     }
  80
  81     int bcount = 0;
  82     for (GSList const *l = _selection->itemList(); l != NULL; l = l->next) {
  83         SPItem *item = (SPItem *) l->data;
  84         SPCanvasItem* box = _item_bboxes[bcount ++];
  85
  86         if (box) {
  87             Geom::OptRect const b = sp_item_bbox_desktop(item, bbox_type);
  88
  89             if (b) {
  90                 sp_canvas_item_show(box);
  91                 if (mode == MARK) {
  92                     SP_CTRL(box)->moveto(Geom::Point(b->min()[Geom::X], b->max()[Geom::Y]));
  93                 } else if (mode == BBOX) {
  94                     SP_CTRLRECT(box)->setRectangle(*b);
  95                 }
  96             } else { // no bbox
  97                 sp_canvas_item_hide(box);
  98             }
  99         }
 100     }
 101
 102     _newTextBaselines();
 103 }
 104
 105
 106 void Inkscape::SelCue::_newItemBboxes()
 107 {
 108     for (std::vector<SPCanvasItem*>::iterator i = _item_bboxes.begin(); i != _item_bboxes.end(); i++) {
 109         gtk_object_destroy(*i);
 110     }
 111     _item_bboxes.clear();
 112
 113     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 114     gint mode = prefs->getInt("/options/selcue/value", MARK);
 115     if (mode == NONE) {
 116         return;
 117     }
 118
 119     g_return_if_fail(_selection != NULL);
 120
 121     int prefs_bbox = prefs->getBool("/tools/bounding_box");
 122     SPItem::BBoxType bbox_type = !prefs_bbox ?
 123         SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
 124
 125     for (GSList const *l = _selection->itemList(); l != NULL; l = l->next) {
 126         SPItem *item = (SPItem *) l->data;
 127
 128         Geom::OptRect const b = sp_item_bbox_desktop(item, bbox_type);
 129
 130         SPCanvasItem* box = NULL;
 131
 132         if (b) {
 133             if (mode == MARK) {
 134                 box = sp_canvas_item_new(sp_desktop_controls(_desktop),
 135                                          SP_TYPE_CTRL,
 136                                          "mode", SP_CTRL_MODE_XOR,
 137                                          "shape", SP_CTRL_SHAPE_DIAMOND,
 138                                          "size", 5.0,
 139                                          "filled", TRUE,
 140                                          "fill_color", 0x000000ff,
 141                                          "stroked", FALSE,
 142                                          "stroke_color", 0x000000ff,
 143                                          NULL);
 144                 sp_canvas_item_show(box);
 145                 SP_CTRL(box)->moveto(Geom::Point(b->min()[Geom::X], b->max()[Geom::Y]));
 146
 147                 sp_canvas_item_move_to_z(box, 0); // just low enough to not get in the way of other draggable knots
 148
 149             } else if (mode == BBOX) {
 150                 box = sp_canvas_item_new(sp_desktop_controls(_desktop),
 151                                          SP_TYPE_CTRLRECT,
 152                                          NULL);
 153
 154                 SP_CTRLRECT(box)->setRectangle(*b);
 155                 SP_CTRLRECT(box)->setColor(0x000000a0, 0, 0);
 156                 SP_CTRLRECT(box)->setDashed(true);
 157
 158                 sp_canvas_item_move_to_z(box, 0);
 159             }
 160         }
 161
 162         if (box) {
 163             _item_bboxes.push_back(box);
 164         }
 165     }
 166
 167     _newTextBaselines();
 168 }
 169
 170 void Inkscape::SelCue::_newTextBaselines()
 171 {
 172     for (std::vector<SPCanvasItem*>::iterator i = _text_baselines.begin(); i != _text_baselines.end(); i++) {
 173         gtk_object_destroy(*i);
 174     }
 175     _text_baselines.clear();
 176
 177     for (GSList const *l = _selection->itemList(); l != NULL; l = l->next) {
 178         SPItem *item = (SPItem *) l->data;
 179
 180         SPCanvasItem* baseline_point = NULL;
 181         if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) { // visualize baseline
 182             Inkscape::Text::Layout const *layout = te_get_layout(item);
 183             if (layout != NULL && layout->outputExists()) {
 184                 boost::optional<Geom::Point> pt = layout->baselineAnchorPoint();
 185                 if (pt) {
 186                     baseline_point = sp_canvas_item_new(sp_desktop_controls(_desktop), SP_TYPE_CTRL,
 187                         "mode", SP_CTRL_MODE_XOR,
 188                         "size", 4.0,
 189                         "filled", 0,
 190                         "stroked", 1,
 191                         "stroke_color", 0x000000ff,
 192                         NULL);
 193
 194                     sp_canvas_item_show(baseline_point);
 195                     SP_CTRL(baseline_point)->moveto((*pt) * sp_item_i2d_affine(item));
 196                     sp_canvas_item_move_to_z(baseline_point, 0);
 197                 }
 198             }
 199         }
 200
 201         if (baseline_point) {
 202                _text_baselines.push_back(baseline_point);
 203         }
 204     }
 205 }
 206
 207
 208 /*
 209   Local Variables:
 210   mode:c++
 211   c-file-style:"stroustrup"
 212   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 213   indent-tabs-mode:nil
 214   fill-column:99
 215   End:
 216 */
 217 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :