src/display/snap-indicator.cpp

   1 /** \file
   2  * Provides a class that shows a temporary indicator on the canvas of where the snap was, and what kind of snap
   3  *
   4  * Authors:
   5  *   Johan Engelen
   6  *
   7  * Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.nl>
   8  *
   9  * Released under GNU GPL, read the file 'COPYING' for more information
  10  */
  11
  12 #include "display/snap-indicator.h"
  13
  14 #include "desktop.h"
  15 #include "desktop-handles.h"
  16 #include "display/sodipodi-ctrl.h"
  17 #include "knot.h"
  18
  19 namespace Inkscape {
  20 namespace Display {
  21
  22 SnapIndicator::SnapIndicator(SPDesktop * desktop)
  23     :   tempitem(NULL),
  24         desktop(desktop)
  25 {
  26 }
  27
  28 SnapIndicator::~SnapIndicator()
  29 {
  30     // remove item that might be present
  31     remove_snappoint();
  32 }
  33
  34 void
  35 SnapIndicator::set_new_snappoint(Inkscape::SnappedPoint const p)
  36 {
  37     remove_snappoint();
  38
  39     bool enabled = true;  // TODO add preference for snap indicator.
  40     if (enabled) {
  41         // TODO add many different kinds of snap indicator :-)
  42         SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (desktop),
  43                                                         SP_TYPE_CTRL,
  44                                                         "anchor", GTK_ANCHOR_CENTER,
  45                                                         "size", 10.0,
  46                                                         "stroked", TRUE,
  47                                                         "stroke_color", 0xf000f0ff,
  48                                                         "mode", SP_KNOT_MODE_XOR,
  49                                                         "shape", SP_KNOT_SHAPE_CROSS,
  50                                                         NULL );
  51
  52
  53         SP_CTRL(canvasitem)->moveto(p.getPoint());
  54         tempitem = desktop->add_temporary_canvasitem(canvasitem, 1000); // TODO add preference for snap indicator timeout
  55     }
  56 }
  57
  58 void
  59 SnapIndicator::remove_snappoint()
  60 {
  61     if (tempitem) {
  62         desktop->remove_temporary_canvasitem(tempitem);
  63         tempitem = NULL;
  64     }
  65 }
  66
  67
  68 } //namespace Display
  69 } /* namespace Inkscape */
  70
  71 /*
  72   Local Variables:
  73   mode:c++
  74   c-file-style:"stroustrup"
  75   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  76   indent-tabs-mode:nil
  77   fill-column:99
  78   End:
  79 */
  80 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :