2013-04-04 00:32:52 -04:00
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/*
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Copyright (C) 2011 Paul Davis
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Author: Carl Hetherington <cth@carlh.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file canvas/canvas.cc
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* @brief Implementation of the main canvas classes.
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*/
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#include <cassert>
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#include <gtkmm/adjustment.h>
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2013-04-11 20:19:22 -04:00
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#include <gtkmm/label.h>
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2013-04-05 11:27:26 -04:00
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2013-04-04 00:32:52 -04:00
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#include "pbd/compose.h"
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2013-04-05 11:27:26 -04:00
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#include "pbd/stacktrace.h"
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2013-04-04 00:32:52 -04:00
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#include "canvas/canvas.h"
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#include "canvas/debug.h"
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using namespace std;
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using namespace ArdourCanvas;
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/** Construct a new Canvas */
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Canvas::Canvas ()
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: _root (this)
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, _log_renders (true)
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2013-04-11 20:19:22 -04:00
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, _scroll_offset_x (0)
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, _scroll_offset_y (0)
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{
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set_epoch ();
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}
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2013-04-11 20:19:22 -04:00
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void
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Canvas::scroll_to (Coord x, Coord y)
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{
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_scroll_offset_x = x;
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_scroll_offset_y = y;
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}
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2013-04-04 00:32:52 -04:00
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/** Render an area of the canvas.
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* @param area Area in canvas coordinates.
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* @param context Cairo context to render to.
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*/
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void
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Canvas::render (Rect const & area, Cairo::RefPtr<Cairo::Context> const & context) const
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{
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2013-04-09 14:22:58 -04:00
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#ifdef CANVAS_DEBUG
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if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
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cerr << "RENDER: " << area << endl;
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//cerr << "CANVAS @ " << this << endl;
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//dump (cerr);
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//cerr << "-------------------------\n";
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}
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#endif
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2013-04-11 20:19:22 -04:00
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// checkpoint ("render", "-> render");
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render_count = 0;
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context->save ();
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2013-04-17 15:22:09 -04:00
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#ifdef CANVAS_DEBUG
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if (getenv ("ARDOUR_REDRAW_CANVAS")) {
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/* light up the canvas to show redraws */
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context->set_source_rgba (random()%255 / 255.0,
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random()%255 / 255.0,
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random()%255 / 255.0,
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0.3);
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context->rectangle (area.x0, area.y0, area.width(), area.height());
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context->fill ();
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}
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#endif
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/* clip to the requested area */
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context->rectangle (area.x0, area.y0, area.width(), area.height());
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context->clip ();
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boost::optional<Rect> root_bbox = _root.bounding_box();
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if (!root_bbox) {
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/* the root has no bounding box, so there's nothing to render */
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// checkpoint ("render", "no root bbox");
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context->restore ();
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return;
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}
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boost::optional<Rect> draw = root_bbox.get().intersection (area);
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if (draw) {
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/* there's a common area between the root and the requested
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area, so render it.
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*/
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2013-04-11 20:19:22 -04:00
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// checkpoint ("render", "... root");
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context->stroke ();
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2013-04-04 00:32:52 -04:00
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_root.render (*draw, context);
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}
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if (_log_renders) {
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_renders.push_back (area);
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}
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context->restore ();
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2013-04-15 10:38:12 -04:00
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#ifdef CANVAS_DEBUG
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if (getenv ("ARDOUR_HARLEQUIN_CANVAS")) {
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/* light up the canvas to show redraws */
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context->set_source_rgba (random()%255 / 255.0,
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random()%255 / 255.0,
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random()%255 / 255.0,
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0.4);
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context->rectangle (area.x0, area.y0, area.width(), area.height());
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context->fill ();
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}
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#endif
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2013-04-11 20:19:22 -04:00
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// checkpoint ("render", "<- render");
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}
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2013-04-05 11:27:26 -04:00
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ostream&
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operator<< (ostream& o, Canvas& c)
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{
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c.dump (o);
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return o;
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}
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std::string
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Canvas::indent() const
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{
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string s;
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for (int n = 0; n < ArdourCanvas::dump_depth; ++n) {
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s += '\t';
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}
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return s;
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}
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2013-04-09 14:22:58 -04:00
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std::string
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Canvas::render_indent() const
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{
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string s;
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for (int n = 0; n < ArdourCanvas::render_depth; ++n) {
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s += ' ';
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}
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return s;
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}
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2013-04-05 11:27:26 -04:00
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void
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Canvas::dump (ostream& o) const
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{
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dump_depth = 0;
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_root.dump (o);
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}
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/** Called when an item has been shown or hidden.
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* @param item Item that has been shown or hidden.
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*/
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void
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Canvas::item_shown_or_hidden (Item* item)
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{
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boost::optional<Rect> bbox = item->bounding_box ();
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if (bbox) {
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queue_draw_item_area (item, bbox.get ());
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}
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}
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/** Called when an item has a change to its visual properties
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* that do NOT affect its bounding box.
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* @param item Item that has been modified.
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*/
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void
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Canvas::item_visual_property_changed (Item* item)
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{
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boost::optional<Rect> bbox = item->bounding_box ();
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if (bbox) {
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queue_draw_item_area (item, bbox.get ());
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}
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}
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/** Called when an item has changed, but not moved.
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* @param item Item that has changed.
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* @param pre_change_bounding_box The bounding box of item before the change,
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* in the item's coordinates.
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*/
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void
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Canvas::item_changed (Item* item, boost::optional<Rect> pre_change_bounding_box)
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{
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if (pre_change_bounding_box) {
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/* request a redraw of the item's old bounding box */
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queue_draw_item_area (item, pre_change_bounding_box.get ());
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}
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boost::optional<Rect> post_change_bounding_box = item->bounding_box ();
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if (post_change_bounding_box) {
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/* request a redraw of the item's new bounding box */
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queue_draw_item_area (item, post_change_bounding_box.get ());
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}
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}
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2013-04-17 10:53:17 -04:00
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Duple
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Canvas::window_to_canvas (Duple const & d) const
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{
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return d.translate (Duple (_scroll_offset_x, _scroll_offset_y));
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}
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Duple
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Canvas::canvas_to_window (Duple const & d) const
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{
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return d.translate (Duple (-_scroll_offset_x, -_scroll_offset_y));
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}
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Rect
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Canvas::window_to_canvas (Rect const & r) const
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{
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return r.translate (Duple (_scroll_offset_x, _scroll_offset_y));
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}
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Rect
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Canvas::canvas_to_window (Rect const & r) const
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{
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return r.translate (Duple (-_scroll_offset_x, -_scroll_offset_y));
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}
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2013-04-04 00:32:52 -04:00
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/** Called when an item has moved.
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* @param item Item that has moved.
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* @param pre_change_parent_bounding_box The bounding box of the item before
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* the move, in its parent's coordinates.
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*/
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void
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Canvas::item_moved (Item* item, boost::optional<Rect> pre_change_parent_bounding_box)
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{
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if (pre_change_parent_bounding_box) {
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2013-04-15 10:38:12 -04:00
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/* request a redraw of where the item used to be. The box has
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* to be in parent coordinate space since the bounding box of
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* an item does not change when moved. If we use
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* item->item_to_canvas() on the old bounding box, we will be
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* using the item's new position, and so will compute the wrong
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* invalidation area. If we use the parent (which has not
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* moved, then this will work.
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*/
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2013-04-04 00:32:52 -04:00
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queue_draw_item_area (item->parent(), pre_change_parent_bounding_box.get ());
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}
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boost::optional<Rect> post_change_bounding_box = item->bounding_box ();
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if (post_change_bounding_box) {
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/* request a redraw of where the item now is */
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queue_draw_item_area (item, post_change_bounding_box.get ());
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}
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}
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/** Request a redraw of a particular area in an item's coordinates.
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* @param item Item.
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* @param area Area to redraw in the item's coordinates.
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*/
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void
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Canvas::queue_draw_item_area (Item* item, Rect area)
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{
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2013-04-15 10:38:12 -04:00
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ArdourCanvas::Rect canvas_area = item->item_to_canvas (area);
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// cerr << "CANVAS Invalidate " << area << " TRANSLATE AS " << canvas_area << endl;
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request_redraw (canvas_area);
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2013-04-04 00:32:52 -04:00
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}
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/** Construct a GtkCanvas */
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GtkCanvas::GtkCanvas ()
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: _current_item (0)
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, _grabbed_item (0)
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{
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/* these are the events we want to know about */
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add_events (Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK | Gdk::POINTER_MOTION_MASK);
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}
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/** Handler for button presses on the canvas.
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* @param ev GDK event.
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*/
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bool
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GtkCanvas::button_handler (GdkEventButton* ev)
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{
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2013-04-10 11:09:16 -04:00
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DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas button %3 %1 %1\n", ev->x, ev->y, (ev->type == GDK_BUTTON_PRESS ? "press" : "release")));
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/* The Duple that we are passing in here is in canvas coordinates */
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return deliver_event (Duple (ev->x, ev->y), reinterpret_cast<GdkEvent*> (ev));
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}
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/** Handler for pointer motion events on the canvas.
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* @param ev GDK event.
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* @return true if the motion event was handled, otherwise false.
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*/
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bool
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GtkCanvas::motion_notify_handler (GdkEventMotion* ev)
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{
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if (_grabbed_item) {
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/* if we have a grabbed item, it gets just the motion event,
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since no enter/leave events can have happened.
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*/
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2013-04-10 11:09:16 -04:00
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DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("%1 %2 (%3) was grabbed, send MOTION event there\n",
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_grabbed_item, _grabbed_item->whatami(), _grabbed_item->name));
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2013-04-04 00:32:52 -04:00
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return _grabbed_item->Event (reinterpret_cast<GdkEvent*> (ev));
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}
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Duple point (ev->x, ev->y);
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2013-04-20 16:09:43 -04:00
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enter_leave_items (point);
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/* Now deliver the motion event. It may seem a little inefficient
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to recompute the items under the event, but the enter notify/leave
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events may have deleted canvas items so it is important to
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recompute the list in deliver_event.
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*/
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return deliver_event (point, reinterpret_cast<GdkEvent*> (ev));
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}
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void
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GtkCanvas::enter_leave_items ()
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{
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int x;
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int y;
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2013-04-24 15:42:14 -04:00
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/* this version of ::enter_leave_items() is called after an item is
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* added or removed, so we have no coordinates to work from as is the
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* case with a motion event. Find out where the mouse is and use that.
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*/
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2013-04-20 16:09:43 -04:00
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Glib::RefPtr<const Gdk::Window> pointer_window = Gdk::Display::get_default()->get_window_at_pointer (x, y);
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if (pointer_window != get_window()) {
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return;
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}
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2013-04-04 00:32:52 -04:00
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2013-04-20 16:09:43 -04:00
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enter_leave_items (window_to_canvas (Duple (x, y)));
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}
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void
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GtkCanvas::enter_leave_items (Duple const & point)
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{
|
2013-04-24 15:42:14 -04:00
|
|
|
/* find the items at the given position */
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
vector<Item const *> items;
|
|
|
|
_root.add_items_at_point (point, items);
|
|
|
|
|
2013-04-24 15:42:14 -04:00
|
|
|
if (items.empty()) {
|
|
|
|
if (_current_item) {
|
|
|
|
/* leave event */
|
|
|
|
GdkEventCrossing leave_event;
|
|
|
|
leave_event.type = GDK_LEAVE_NOTIFY;
|
|
|
|
leave_event.x = point.x;
|
|
|
|
leave_event.y = point.y;
|
|
|
|
cerr << "Leaving (without entering)" << _current_item->name << endl;
|
|
|
|
_current_item->Event (reinterpret_cast<GdkEvent*> (&leave_event));
|
|
|
|
_current_item = 0;
|
|
|
|
}
|
|
|
|
return;
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
|
2013-04-24 15:42:14 -04:00
|
|
|
/* items is sorted from bottom to top, so reverse through it from top
|
|
|
|
* to bottom to find the first event-sensitive item and notify that
|
|
|
|
* we have entered it
|
|
|
|
*/
|
|
|
|
|
|
|
|
for (vector<Item const*>::const_reverse_iterator i = items.rbegin(); i != items.rend(); ++i) {
|
|
|
|
|
|
|
|
Item const * new_item = *i;
|
|
|
|
|
|
|
|
if (new_item->ignore_events()) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (_current_item && _current_item != new_item) {
|
|
|
|
/* leave event */
|
|
|
|
GdkEventCrossing leave_event;
|
|
|
|
leave_event.type = GDK_LEAVE_NOTIFY;
|
|
|
|
leave_event.x = point.x;
|
|
|
|
leave_event.y = point.y;
|
|
|
|
cerr << "Leaving " << _current_item->name << endl;
|
|
|
|
_current_item->Event (reinterpret_cast<GdkEvent*> (&leave_event));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (new_item && _current_item != new_item) {
|
|
|
|
/* enter event */
|
|
|
|
GdkEventCrossing enter_event;
|
|
|
|
enter_event.type = GDK_ENTER_NOTIFY;
|
|
|
|
enter_event.x = point.x;
|
|
|
|
enter_event.y = point.y;
|
|
|
|
cerr << "Entering (" << new_item->name << ") " << new_item->whatami() << endl;
|
|
|
|
new_item->Event (reinterpret_cast<GdkEvent*> (&enter_event));
|
|
|
|
}
|
|
|
|
|
|
|
|
_current_item = new_item;
|
|
|
|
break;
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/** Deliver an event to the appropriate item; either the grabbed item, or
|
|
|
|
* one of the items underneath the event.
|
|
|
|
* @param point Position that the event has occurred at, in canvas coordinates.
|
|
|
|
* @param event The event.
|
|
|
|
*/
|
|
|
|
bool
|
|
|
|
GtkCanvas::deliver_event (Duple point, GdkEvent* event)
|
|
|
|
{
|
|
|
|
if (_grabbed_item) {
|
|
|
|
/* we have a grabbed item, so everything gets sent there */
|
2013-04-10 11:09:16 -04:00
|
|
|
DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("%1 %2 (%3) was grabbed, send event there\n",
|
|
|
|
_grabbed_item, _grabbed_item->whatami(), _grabbed_item->name));
|
2013-04-04 00:32:52 -04:00
|
|
|
return _grabbed_item->Event (event);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* find the items that exist at the event's position */
|
|
|
|
vector<Item const *> items;
|
|
|
|
_root.add_items_at_point (point, items);
|
|
|
|
|
2013-04-10 11:09:16 -04:00
|
|
|
DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("%1 possible items to deliver event to\n", items.size()));
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
/* run through the items under the event, from top to bottom, until one claims the event */
|
|
|
|
vector<Item const *>::const_reverse_iterator i = items.rbegin ();
|
|
|
|
while (i != items.rend()) {
|
|
|
|
|
|
|
|
if ((*i)->ignore_events ()) {
|
2013-04-09 14:22:58 -04:00
|
|
|
DEBUG_TRACE (
|
|
|
|
PBD::DEBUG::CanvasEvents,
|
|
|
|
string_compose ("canvas event ignored by %1 %2\n", (*i)->whatami(), (*i)->name.empty() ? "[unknown]" : (*i)->name)
|
|
|
|
);
|
2013-04-04 00:32:52 -04:00
|
|
|
++i;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((*i)->Event (event)) {
|
|
|
|
/* this item has just handled the event */
|
|
|
|
DEBUG_TRACE (
|
|
|
|
PBD::DEBUG::CanvasEvents,
|
2013-04-09 14:22:58 -04:00
|
|
|
string_compose ("canvas event handled by %1 %2\n", (*i)->whatami(), (*i)->name.empty() ? "[unknown]" : (*i)->name)
|
2013-04-04 00:32:52 -04:00
|
|
|
);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
DEBUG_TRACE (
|
|
|
|
PBD::DEBUG::CanvasEvents,
|
2013-04-09 14:22:58 -04:00
|
|
|
string_compose ("canvas event left unhandled by %1 %2\n", (*i)->whatami(), (*i)->name.empty() ? "[unknown]" : (*i)->name)
|
2013-04-04 00:32:52 -04:00
|
|
|
);
|
|
|
|
|
|
|
|
++i;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* debugging */
|
|
|
|
if (PBD::debug_bits & PBD::DEBUG::CanvasEvents) {
|
|
|
|
while (i != items.rend()) {
|
|
|
|
DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas event not seen by %1\n", (*i)->name.empty() ? "[unknown]" : (*i)->name));
|
|
|
|
++i;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/** Called when an item is being destroyed.
|
|
|
|
* @param item Item being destroyed.
|
|
|
|
* @param bounding_box Last known bounding box of the item.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
GtkCanvas::item_going_away (Item* item, boost::optional<Rect> bounding_box)
|
|
|
|
{
|
|
|
|
if (bounding_box) {
|
|
|
|
queue_draw_item_area (item, bounding_box.get ());
|
|
|
|
}
|
|
|
|
|
|
|
|
if (_current_item == item) {
|
|
|
|
_current_item = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (_grabbed_item == item) {
|
|
|
|
_grabbed_item = 0;
|
|
|
|
}
|
2013-04-20 16:09:43 -04:00
|
|
|
|
|
|
|
enter_leave_items ();
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/** Handler for GDK expose events.
|
|
|
|
* @param ev Event.
|
|
|
|
* @return true if the event was handled.
|
|
|
|
*/
|
|
|
|
bool
|
|
|
|
GtkCanvas::on_expose_event (GdkEventExpose* ev)
|
|
|
|
{
|
2013-04-11 20:19:22 -04:00
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
Cairo::RefPtr<Cairo::Context> c = get_window()->create_cairo_context ();
|
2013-04-11 20:19:22 -04:00
|
|
|
|
|
|
|
/* WINDOW CANVAS
|
|
|
|
* 0,0 _scroll_offset_x, _scroll_offset_y
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* render using canvas coordinates */
|
|
|
|
|
|
|
|
Rect canvas_area (ev->area.x, ev->area.y, ev->area.x + ev->area.width, ev->area.y + ev->area.height);
|
|
|
|
canvas_area = canvas_area.translate (Duple (_scroll_offset_x, _scroll_offset_y));
|
|
|
|
|
|
|
|
/* things are going to render to the cairo surface with canvas
|
|
|
|
* coordinates:
|
|
|
|
*
|
|
|
|
* an item at window/cairo 0,0 will have canvas_coords _scroll_offset_x,_scroll_offset_y
|
|
|
|
*
|
|
|
|
* let them render at their natural coordinates by using cairo_translate()
|
|
|
|
*/
|
|
|
|
|
|
|
|
c->translate (-_scroll_offset_x, -_scroll_offset_y);
|
|
|
|
|
|
|
|
render (canvas_area, c);
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/** @return Our Cairo context, or 0 if we don't have one */
|
|
|
|
Cairo::RefPtr<Cairo::Context>
|
|
|
|
GtkCanvas::context ()
|
|
|
|
{
|
|
|
|
Glib::RefPtr<Gdk::Window> w = get_window ();
|
|
|
|
if (!w) {
|
|
|
|
return Cairo::RefPtr<Cairo::Context> ();
|
|
|
|
}
|
|
|
|
|
|
|
|
return w->create_cairo_context ();
|
|
|
|
}
|
|
|
|
|
|
|
|
/** Handler for GDK button press events.
|
|
|
|
* @param ev Event.
|
|
|
|
* @return true if the event was handled.
|
|
|
|
*/
|
|
|
|
bool
|
|
|
|
GtkCanvas::on_button_press_event (GdkEventButton* ev)
|
|
|
|
{
|
2013-04-11 20:19:22 -04:00
|
|
|
/* translate event coordinates from window to canvas */
|
|
|
|
|
|
|
|
GdkEvent copy = *((GdkEvent*)ev);
|
|
|
|
Duple where = window_to_canvas (Duple (ev->x, ev->y));
|
|
|
|
|
|
|
|
copy.button.x = where.x;
|
|
|
|
copy.button.y = where.y;
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
/* Coordinates in the event will be canvas coordinates, correctly adjusted
|
|
|
|
for scroll if this GtkCanvas is in a GtkCanvasViewport.
|
|
|
|
*/
|
2013-04-11 20:19:22 -04:00
|
|
|
return button_handler ((GdkEventButton*) ©);
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/** Handler for GDK button release events.
|
|
|
|
* @param ev Event.
|
|
|
|
* @return true if the event was handled.
|
|
|
|
*/
|
|
|
|
bool
|
|
|
|
GtkCanvas::on_button_release_event (GdkEventButton* ev)
|
2013-04-11 20:19:22 -04:00
|
|
|
{
|
|
|
|
/* translate event coordinates from window to canvas */
|
|
|
|
|
|
|
|
GdkEvent copy = *((GdkEvent*)ev);
|
|
|
|
Duple where = window_to_canvas (Duple (ev->x, ev->y));
|
|
|
|
|
|
|
|
copy.button.x = where.x;
|
|
|
|
copy.button.y = where.y;
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
/* Coordinates in the event will be canvas coordinates, correctly adjusted
|
|
|
|
for scroll if this GtkCanvas is in a GtkCanvasViewport.
|
|
|
|
*/
|
2013-04-11 20:19:22 -04:00
|
|
|
return button_handler ((GdkEventButton*) ©);
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/** Handler for GDK motion events.
|
|
|
|
* @param ev Event.
|
|
|
|
* @return true if the event was handled.
|
|
|
|
*/
|
|
|
|
bool
|
|
|
|
GtkCanvas::on_motion_notify_event (GdkEventMotion* ev)
|
|
|
|
{
|
2013-04-11 20:19:22 -04:00
|
|
|
/* translate event coordinates from window to canvas */
|
|
|
|
|
|
|
|
GdkEvent copy = *((GdkEvent*)ev);
|
|
|
|
Duple where = window_to_canvas (Duple (ev->x, ev->y));
|
|
|
|
|
|
|
|
copy.motion.x = where.x;
|
|
|
|
copy.motion.y = where.y;
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
/* Coordinates in the event will be canvas coordinates, correctly adjusted
|
|
|
|
for scroll if this GtkCanvas is in a GtkCanvasViewport.
|
|
|
|
*/
|
2013-04-11 20:19:22 -04:00
|
|
|
return motion_notify_handler ((GdkEventMotion*) ©);
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/** Called to request a redraw of our canvas.
|
|
|
|
* @param area Area to redraw, in canvas coordinates.
|
|
|
|
*/
|
|
|
|
void
|
2013-04-11 20:19:22 -04:00
|
|
|
GtkCanvas::request_redraw (Rect const & request)
|
2013-04-04 00:32:52 -04:00
|
|
|
{
|
2013-04-11 20:19:22 -04:00
|
|
|
Rect area = canvas_to_window (request);
|
2013-04-15 10:38:12 -04:00
|
|
|
// cerr << "Invalidate " << request << " TRANSLATE AS " << area << endl;
|
2013-04-04 00:32:52 -04:00
|
|
|
queue_draw_area (floor (area.x0), floor (area.y0), ceil (area.x1) - floor (area.x0), ceil (area.y1) - floor (area.y0));
|
|
|
|
}
|
|
|
|
|
|
|
|
/** Called to request that we try to get a particular size for ourselves.
|
|
|
|
* @param size Size to request, in pixels.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
GtkCanvas::request_size (Duple size)
|
|
|
|
{
|
|
|
|
Duple req = size;
|
|
|
|
|
|
|
|
if (req.x > INT_MAX) {
|
|
|
|
req.x = INT_MAX;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (req.y > INT_MAX) {
|
|
|
|
req.y = INT_MAX;
|
|
|
|
}
|
2013-04-05 11:27:26 -04:00
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
set_size_request (req.x, req.y);
|
|
|
|
}
|
|
|
|
|
|
|
|
/** `Grab' an item, so that all events are sent to that item until it is `ungrabbed'.
|
|
|
|
* This is typically used for dragging items around, so that they are grabbed during
|
|
|
|
* the drag.
|
|
|
|
* @param item Item to grab.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
GtkCanvas::grab (Item* item)
|
|
|
|
{
|
|
|
|
/* XXX: should this be doing gdk_pointer_grab? */
|
|
|
|
_grabbed_item = item;
|
|
|
|
}
|
|
|
|
|
|
|
|
/** `Ungrab' any item that was previously grabbed */
|
|
|
|
void
|
|
|
|
GtkCanvas::ungrab ()
|
|
|
|
{
|
|
|
|
/* XXX: should this be doing gdk_pointer_ungrab? */
|
|
|
|
_grabbed_item = 0;
|
|
|
|
}
|
|
|
|
|
2013-04-17 10:53:17 -04:00
|
|
|
/** @return The visible area of the canvas, in canvas coordinates */
|
|
|
|
Rect
|
|
|
|
GtkCanvas::visible_area () const
|
|
|
|
{
|
|
|
|
Distance const xo = _scroll_offset_x;
|
|
|
|
Distance const yo = _scroll_offset_y;
|
|
|
|
return Rect (xo, yo, xo + get_allocation().get_width (), yo + get_allocation().get_height ());
|
|
|
|
}
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
/** Create a GtkCanvaSViewport.
|
|
|
|
* @param hadj Adjustment to use for horizontal scrolling.
|
|
|
|
* @param vadj Adjustment to use for vertica scrolling.
|
|
|
|
*/
|
|
|
|
GtkCanvasViewport::GtkCanvasViewport (Gtk::Adjustment& hadj, Gtk::Adjustment& vadj)
|
2013-04-11 20:19:22 -04:00
|
|
|
: Alignment (0, 0, 1.0, 1.0)
|
|
|
|
, hadjustment (hadj)
|
|
|
|
, vadjustment (vadj)
|
2013-04-04 00:32:52 -04:00
|
|
|
{
|
|
|
|
add (_canvas);
|
2013-04-11 20:19:22 -04:00
|
|
|
|
|
|
|
hadj.signal_value_changed().connect (sigc::mem_fun (*this, &GtkCanvasViewport::scrolled));
|
|
|
|
vadj.signal_value_changed().connect (sigc::mem_fun (*this, &GtkCanvasViewport::scrolled));
|
2013-04-04 00:32:52 -04:00
|
|
|
}
|
|
|
|
|
2013-04-11 20:19:22 -04:00
|
|
|
void
|
|
|
|
GtkCanvasViewport::scrolled ()
|
|
|
|
{
|
|
|
|
_canvas.scroll_to (hadjustment.get_value(), vadjustment.get_value());
|
|
|
|
queue_draw ();
|
|
|
|
}
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
/** Handler for when GTK asks us what minimum size we want.
|
|
|
|
* @param req Requsition to fill in.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
GtkCanvasViewport::on_size_request (Gtk::Requisition* req)
|
|
|
|
{
|
2013-04-11 20:19:22 -04:00
|
|
|
/* force the canvas to size itself */
|
|
|
|
// _canvas.root()->bounding_box();
|
|
|
|
|
2013-04-04 00:32:52 -04:00
|
|
|
req->width = 16;
|
|
|
|
req->height = 16;
|
|
|
|
}
|
|
|
|
|