Uh, long comment arrives... Zoom update does not happen after editorial steps. Nodes initial color is light blue, if there is any item under them. Strange node-text relations disappeared. Initial values of new items are given now in a more common way. The wood-cutter way of handling default values of properties is now changed.
1 #include <graph_displayer_canvas.h>
2 #include <broken_edge.h>
5 void GraphDisplayerCanvas::zoomIn()
8 (1.0 + (double) zoom_step / 100.0) * get_pixels_per_unit());
11 void GraphDisplayerCanvas::zoomOut()
14 (1.0 - (double) zoom_step / 100.0) * get_pixels_per_unit());
17 void GraphDisplayerCanvas::zoomFit()
19 // get the height and width of the canvas
20 Gtk::Allocation a = get_allocation();
21 int aw = a.get_width();
22 int ah = a.get_height();
24 aw -= 5; if (aw < 0) aw = 0;
25 ah -= 5; if (ah < 0) ah = 0;
27 // get the bounding box of the graph
28 double wx1, wy1, wx2, wy2;
29 Gnome::Canvas::Item* pCanvasItem = root();
30 pCanvasItem->get_bounds(wx1, wy1, wx2, wy2);
32 // fit the graph to the window
33 double ppu1 = (double) aw / fabs(wx2 - wx1);
34 double ppu2 = (double) ah / fabs(wy2 - wy1);
35 set_pixels_per_unit((ppu1 < ppu2) ? ppu1 : ppu2);
38 void GraphDisplayerCanvas::zoom100()
40 set_pixels_per_unit(1.0);
43 void GraphDisplayerCanvas::updateScrollRegion()
45 double wx1, wy1, wx2, wy2;
46 Gnome::Canvas::Item* pCanvasItem = root();
47 pCanvasItem->get_bounds(wx1, wy1, wx2, wy2);
48 set_scroll_region(wx1, wy1, wx2, wy2);