COIN-OR::LEMON - Graph Library

source: lemon-0.x/gui/graph_displayer_canvas.h @ 1589:9192e1b26d32

Last change on this file since 1589:9192e1b26d32 was 1589:9192e1b26d32, checked in by Hegyi Péter, 15 years ago

creates one new edgemap

File size: 5.9 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
112  ///creates a new Nodemap
113  void addNewNodeMap();
114  ///creates a new Edgemap
115  void addNewEdgeMap();
116
117private:
118  ///Deletes the given element.
119  void deleteItem(NodeIt);
120  ///Deletes the given element.
121  void deleteItem(EdgeIt);
122  ///Deletes the given element.
123  void deleteItem(Graph::Edge);
124
125private:
126
127  ///The graph, on which we work
128  Graph & g;
129
130  ///Map of nodes of graph
131  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
132
133  ///Map of edges of graph
134  Graph::EdgeMap<BrokenEdge *> edgesmap;
135
136  ///Map of texts to write on edges
137  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
138
139  ///Map of texts to write on nodes
140  Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
141
142  ///Group of graphical elements of displayed_graph
143  Gnome::Canvas::Group displayed_graph;
144
145  ///Map editor entry
146  Gtk::Entry entrywidget;
147
148  ///GnomeCanvas holder for entry
149  Gnome::Canvas::Widget * canvasentrywidget;
150
151  ///Here we store the maps that can be displayed through properties.
152  MapStorage & mapstorage;
153
154  ///Indicates whether the button of mouse is pressed or not
155  int isbutton;
156
157  ///Stores the actual tool in hand
158  int actual_tool;
159
160  ///At this location was the mousebutton pressed.
161  ///It helps to calculate the distance of dragging.
162  double clicked_x, clicked_y;
163
164  ///Remembers which Gnome::Canvas::Item was pressed.
165  ///this variable is needed, because
166  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
167  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
168  Gnome::Canvas::Item * active_item, * target_item;
169  Graph::NodeIt active_node;
170  Graph::EdgeIt active_edge;
171  Graph::EdgeIt forming_edge;
172
173  std::string nodemap_to_edit, edgemap_to_edit;
174
175  static const int zoom_step = 5;
176
177  ///We need to store mapwin, to be able to ask the appropriate values for properties of new items.
178  MapWin * mapwin;
179
180};
181
182#endif //GRAPH_DISPLAYER_CANVAS_H
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