COIN-OR::LEMON - Graph Library

source: glemon-0.x/graph_displayer_canvas.h @ 34:2cb1fc37f742

gui
Last change on this file since 34:2cb1fc37f742 was 34:2cb1fc37f742, checked in by Hegyi Péter, 14 years ago

EdgeMapEditor? is on its way, but it is far not yet ready.

File size: 5.4 KB
Line 
1// -*- C++ -*- //
2
3#ifndef GRAPH_DISPLAYER_CANVAS_H
4#define GRAPH_DISPLAYER_CANVAS_H
5
6class GraphDisplayerCanvas;
7
8#include <all_include.h>
9#include <map_win.h>
10#include <mapstorage.h>
11#include <broken_edge.h>
12#include <libgnomecanvasmm.h>
13#include <libgnomecanvasmm/polygon.h>
14
15///This class is the canvas, on which the graph can be drawn.
16class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
17{
18  typedef Gnome::Canvas::CanvasAA Parent;
19
20public:
21  GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &, MapWin *);
22  virtual ~GraphDisplayerCanvas();
23
24  ///Changes the linewidth attribute according to the given map.
25  ///\param mapname is the name of the map which contains the new values
26  int changeEdgeWidth (std::string mapname, Graph::Edge new_item=INVALID);
27
28  ///Changes the linecolor attribute according to the given map.
29  ///\param mapname is the name of the map which contains the new values
30  int changeEdgeColor (std::string mapname, Graph::Edge new_item=INVALID);
31
32  ///Changes the text of line attribute according to the given map.
33  ///\param mapname is the name of the map which contains the new values
34  int changeEdgeText (std::string mapname, Graph::Edge new_item=INVALID);
35
36  ///Changes the linewidth attribute according to the given map.
37  ///\param mapname is the name of the map which contains the new values
38  int changeNodeRadius (std::string mapname, Graph::Node new_item=INVALID);
39
40  ///Changes the linecolor attribute according to the given map.
41  ///\param mapname is the name of the map which contains the new values
42  int changeNodeColor (std::string mapname, Graph::Node new_item=INVALID);
43
44  ///Changes the text of line attribute according to the given map.
45  ///\param mapname is the name of the map which contains the new values
46  int changeNodeText (std::string mapname, Graph::Node new_item=INVALID);
47
48  ///Callback for 'ViewZoomIn' action.
49  virtual void zoomIn();
50  ///Callback for 'ViewZoomOut' action.
51  virtual void zoomOut();
52  ///Callback for 'ViewZoomFit' action.
53  virtual void zoomFit();
54  ///Callback for 'ViewZoom100' action.
55  virtual void zoom100();
56  ///Sets the scroll region of the convas to the bounding box of the graph.
57  void updateScrollRegion();
58
59  ///This function changes the tool in the graph-editor's hand
60  void changeEditorialTool(int);
61
62protected:
63
64  //maximizing, minimizing, restoring window, etc.
65  virtual bool on_expose_event(GdkEventExpose *);
66
67private:
68
69  ///This function is responsible for the correct
70  ///reaction of any action happened in the territory
71  ///of the canvas
72  ///DEPRECATED!!!!
73  bool eventHandler(GdkEvent* e, Node n);
74
75  ///actual event handler
76  ///
77  ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
78  sigc::connection actual_handler;
79
80  ///event handler for the case when move-tool is active
81  bool moveEventHandler(GdkEvent*);
82  ///event handler for the case when create_node-tool is active
83  bool createNodeEventHandler(GdkEvent*);
84  ///event handler for the case when create_edge-tool is active
85  bool createEdgeEventHandler(GdkEvent*);
86  ///event handler for the case when eraser-tool is active
87  bool eraserEventHandler(GdkEvent*);
88  ///event handler for the case when edge map editor tool is active
89  bool edgeMapEditEventHandler(GdkEvent*);
90  ///event handler for the case when node map editor tool is active
91  bool nodeMapEditEventHandler(GdkEvent*);
92
93  ///event handler for the case when the entry widget is changed
94  bool entryWidgetChangeHandler(GdkEvent*);
95
96public:
97  ///Moves the text to new place
98  void textReposition(xy<double>);
99  ///Activates an edge belonging to a BrokenEdge
100  void toggleEdgeActivity(BrokenEdge*, bool);
101
102public:
103  ///\return the actual tool in hand
104  int getActualTool();
105
106private:
107  ///Deletes the given element.
108  void deleteItem(NodeIt);
109  ///Deletes the given element.
110  void deleteItem(EdgeIt);
111  ///Deletes the given element.
112  void deleteItem(Graph::Edge);
113
114private:
115
116  ///The graph, on which we work
117  Graph & g;
118
119  ///Map of nodes of graph
120  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
121
122  ///Map of edges of graph
123  Graph::EdgeMap<BrokenEdge *> edgesmap;
124
125  ///Map of texts to write on edges
126  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
127
128  ///Map of texts to write on nodes
129  Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
130
131  ///Group of graphical elements of displayed_graph
132  Gnome::Canvas::Group displayed_graph;
133
134  ///Map editor entry
135  Gtk::Entry entrywidget;
136
137  ///GnomeCanvas holder for entry
138  Gnome::Canvas::Widget * canvasentrywidget;
139
140  ///Here we store the maps that can be displayed through properties.
141  MapStorage mapstorage;
142
143  ///Indicates whether the button of mouse is pressed or not
144  int isbutton;
145
146  ///Stores the actual tool in hand
147  int actual_tool;
148
149  ///At this location was the mousebutton pressed.
150  ///It helps to calculate the distance of dragging.
151  double clicked_x, clicked_y;
152
153  ///Remembers which Gnome::Canvas::Item was pressed.
154  ///this variable is needed, because
155  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
156  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
157  Gnome::Canvas::Item * active_item, * target_item;
158  Graph::NodeIt active_node;
159  Graph::EdgeIt active_edge;
160
161  static const int zoom_step = 5;
162
163  ///We need to store mapwin, to be able to ask the appropriate values for properties of new items.
164  MapWin * mapwin;
165
166};
167
168#endif //GRAPH_DISPLAYER_CANVAS_H
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