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alpar@174
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/* -*- C++ -*-
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alpar@174
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*
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alpar@174
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* This file is a part of LEMON, a generic C++ optimization library
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alpar@174
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*
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alpar@174
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* Copyright (C) 2003-2006
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alpar@174
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* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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alpar@174
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* (Egervary Research Group on Combinatorial Optimization, EGRES).
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alpar@174
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*
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alpar@174
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* Permission to use, modify and distribute this software is granted
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alpar@174
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* provided that this copyright notice appears in all copies. For
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alpar@174
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* precise terms see the accompanying LICENSE file.
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alpar@174
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*
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alpar@174
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* This software is provided "AS IS" with no warranty of any kind,
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alpar@174
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* express or implied, and with no claim as to its suitability for any
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alpar@174
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* purpose.
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alpar@174
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*
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alpar@174
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*/
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alpar@174
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ladanyi@53
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#include "graph_displayer_canvas.h"
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alpar@59
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#include <cmath>
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hegyi@27
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hegyi@27
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void GraphDisplayerCanvas::zoomIn()
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hegyi@27
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{
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hegyi@27
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set_pixels_per_unit(
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hegyi@27
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(1.0 + (double) zoom_step / 100.0) * get_pixels_per_unit());
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hegyi@156
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if(zoomtrack)
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hegyi@156
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{
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hegyi@156
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propertyChange(false, N_RADIUS);
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hegyi@157
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propertyChange(true, E_WIDTH);
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hegyi@156
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}
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hegyi@27
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}
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hegyi@27
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hegyi@27
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void GraphDisplayerCanvas::zoomOut()
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hegyi@27
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{
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hegyi@27
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set_pixels_per_unit(
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hegyi@27
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(1.0 - (double) zoom_step / 100.0) * get_pixels_per_unit());
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hegyi@156
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if(zoomtrack)
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hegyi@156
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{
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hegyi@157
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propertyChange(true, E_WIDTH);
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hegyi@156
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propertyChange(false, N_RADIUS);
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hegyi@156
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}
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hegyi@27
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}
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hegyi@27
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hegyi@27
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void GraphDisplayerCanvas::zoomFit()
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hegyi@27
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{
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ladanyi@87
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updateScrollRegion();
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ladanyi@87
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hegyi@27
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// get the height and width of the canvas
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hegyi@27
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Gtk::Allocation a = get_allocation();
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hegyi@27
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int aw = a.get_width();
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hegyi@27
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int ah = a.get_height();
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hegyi@27
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hegyi@27
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// get the bounding box of the graph
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ladanyi@87
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update_now();
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ladanyi@87
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double x1, y1, x2, y2;
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ladanyi@87
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root()->get_bounds(x1, y1, x2, y2);
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hegyi@27
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hegyi@27
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// fit the graph to the window
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ladanyi@87
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double ppu1 = (double) aw / fabs(x2 - x1);
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ladanyi@87
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double ppu2 = (double) ah / fabs(y2 - y1);
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hegyi@27
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set_pixels_per_unit((ppu1 < ppu2) ? ppu1 : ppu2);
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hegyi@156
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hegyi@156
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if(zoomtrack)
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hegyi@156
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{
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hegyi@157
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propertyChange(true, E_WIDTH);
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hegyi@156
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propertyChange(false, N_RADIUS);
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hegyi@156
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}
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hegyi@27
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}
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hegyi@27
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hegyi@27
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void GraphDisplayerCanvas::zoom100()
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hegyi@27
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{
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ladanyi@87
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updateScrollRegion();
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hegyi@27
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set_pixels_per_unit(1.0);
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hegyi@156
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hegyi@156
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if(zoomtrack)
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hegyi@156
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{
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hegyi@157
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propertyChange(true, E_WIDTH);
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hegyi@156
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propertyChange(false, N_RADIUS);
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hegyi@156
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}
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hegyi@27
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}
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hegyi@27
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hegyi@27
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void GraphDisplayerCanvas::updateScrollRegion()
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hegyi@27
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{
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ladanyi@87
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// get_bounds() yields something sane only when no updates are pending
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ladanyi@87
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// and it returns a sufficient, not an exact bounding box
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ladanyi@87
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update_now();
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ladanyi@87
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double x1, y1, x2, y2;
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ladanyi@87
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root()->get_bounds(x1, y1, x2, y2);
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ladanyi@87
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set_scroll_region(x1, y1, x2, y2);
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hegyi@27
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}
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