COIN-OR::LEMON - Graph Library

source: glemon-0.x/graph_displayer_canvas.h @ 35:79bffdf6aea2

gui
Last change on this file since 35:79bffdf6aea2 was 35:79bffdf6aea2, checked in by Hegyi Péter, 14 years ago

Edge and nodemap edition is done.

File size: 5.8 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  ///
101  ///After we have activated an edge this way,
102  ///the GDC object will know, which edge is under forming
103  ///therefore it can redraw the necessarz elementy on the canvas,
104  ///for example the text belonging to the \ref BrokenEdge can be
105  ///redrawn (\ref textReposition).
106  void toggleEdgeActivity(BrokenEdge*, bool);
107
108public:
109  ///\return the actual tool in hand
110  int getActualTool();
111
112private:
113  ///Deletes the given element.
114  void deleteItem(NodeIt);
115  ///Deletes the given element.
116  void deleteItem(EdgeIt);
117  ///Deletes the given element.
118  void deleteItem(Graph::Edge);
119
120private:
121
122  ///The graph, on which we work
123  Graph & g;
124
125  ///Map of nodes of graph
126  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
127
128  ///Map of edges of graph
129  Graph::EdgeMap<BrokenEdge *> edgesmap;
130
131  ///Map of texts to write on edges
132  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
133
134  ///Map of texts to write on nodes
135  Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
136
137  ///Group of graphical elements of displayed_graph
138  Gnome::Canvas::Group displayed_graph;
139
140  ///Map editor entry
141  Gtk::Entry entrywidget;
142
143  ///GnomeCanvas holder for entry
144  Gnome::Canvas::Widget * canvasentrywidget;
145
146  ///Here we store the maps that can be displayed through properties.
147  MapStorage mapstorage;
148
149  ///Indicates whether the button of mouse is pressed or not
150  int isbutton;
151
152  ///Stores the actual tool in hand
153  int actual_tool;
154
155  ///At this location was the mousebutton pressed.
156  ///It helps to calculate the distance of dragging.
157  double clicked_x, clicked_y;
158
159  ///Remembers which Gnome::Canvas::Item was pressed.
160  ///this variable is needed, because
161  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
162  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
163  Gnome::Canvas::Item * active_item, * target_item;
164  Graph::NodeIt active_node;
165  Graph::EdgeIt active_edge;
166  Graph::EdgeIt forming_edge;
167
168  std::string nodemap_to_edit, edgemap_to_edit;
169
170  static const int zoom_step = 5;
171
172  ///We need to store mapwin, to be able to ask the appropriate values for properties of new items.
173  MapWin * mapwin;
174
175};
176
177#endif //GRAPH_DISPLAYER_CANVAS_H
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