COIN-OR::LEMON - Graph Library

source: lemon-0.x/gui/graph_displayer_canvas.h @ 1862:d47ebd34e581

Last change on this file since 1862:d47ebd34e581 was 1860:27a9a75b957b, checked in by Akos Ladanyi, 14 years ago

Save and load the coordinates of the arrows on the edges.

File size: 6.4 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 "nbtab.h"
10#include <libgnomecanvasmm.h>
11#include <libgnomecanvasmm/polygon.h>
12#include <lemon/xy.h>
13
14///This class is the canvas, on which the graph can be drawn.
15class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
16{
17  friend class BrokenEdge;
18
19  class BrokenEdge : public Gnome::Canvas::Line
20  {
21    Edge edge;
22    GraphDisplayerCanvas & gdc;
23    Gnome::Canvas::Polygon * arrow;
24
25    ///Indicates whether the button of mouse is pressed or not
26    bool isbutton;
27
28    ///At this location was the mousebutton pressed.
29    ///It helps to calculate the distance of dragging.
30    double clicked_x, clicked_y;
31
32    ///event handler for forming edges
33    bool edgeFormerEventHandler(GdkEvent*);
34  public:
35    BrokenEdge(Gnome::Canvas::Group &, Edge, GraphDisplayerCanvas &);
36    ~BrokenEdge();
37    void draw();
38  };
39  typedef Gnome::Canvas::CanvasAA Parent;
40
41public:
42  GraphDisplayerCanvas(NoteBookTab &);
43  virtual ~GraphDisplayerCanvas();
44
45  ///Changes the linewidth attribute according to the given map.
46  ///\param mapname is the name of the map which contains the new values
47  int changeEdgeWidth (std::string mapname, Edge new_item=INVALID);
48  int resetEdgeWidth (Edge new_item=INVALID);
49
50  ///Changes the linecolor attribute according to the given map.
51  ///\param mapname is the name of the map which contains the new values
52  int changeEdgeColor (std::string mapname, Edge new_item=INVALID);
53  int resetEdgeColor (Edge new_item=INVALID);
54
55  ///Changes the text of line attribute according to the given map.
56  ///\param mapname is the name of the map which contains the new values
57  int changeEdgeText (std::string mapname, Edge new_item=INVALID);
58  int resetEdgeText (Edge new_item=INVALID);
59
60  ///Changes the linewidth attribute according to the given map.
61  ///\param mapname is the name of the map which contains the new values
62  int changeNodeRadius (std::string mapname, Node new_item=INVALID);
63  int resetNodeRadius (Node new_item=INVALID);
64
65  ///Changes the linecolor attribute according to the given map.
66  ///\param mapname is the name of the map which contains the new values
67  int changeNodeColor (std::string mapname, Node new_item=INVALID);
68  int resetNodeColor (Node new_item=INVALID);
69
70  ///Changes the text of line attribute according to the given map.
71  ///\param mapname is the name of the map which contains the new values
72  int changeNodeText (std::string mapname, Node new_item=INVALID);
73  int resetNodeText (Node new_item=INVALID);
74
75  void propertyChange(bool, int);
76  void propertyUpdate(Edge, int, int dummy=0);
77  void propertyUpdate(Node, int, int dummy=0);
78
79  void propertyUpdate(Edge);
80  void propertyUpdate(Node);
81
82  ///Callback for 'ViewZoomIn' action.
83  virtual void zoomIn();
84  ///Callback for 'ViewZoomOut' action.
85  virtual void zoomOut();
86  ///Callback for 'ViewZoomFit' action.
87  virtual void zoomFit();
88  ///Callback for 'ViewZoom100' action.
89  virtual void zoom100();
90  ///Sets the scroll region of the convas to the bounding box of the graph.
91  void updateScrollRegion();
92
93  ///This function changes the tool in the graph-editor's hand
94  void changeEditorialTool(int);
95
96protected:
97
98  //maximizing, minimizing, restoring window, etc.
99  virtual bool on_expose_event(GdkEventExpose *);
100
101private:
102
103  ///This function is responsible for the correct
104  ///reaction of any action happened in the territory
105  ///of the canvas
106  ///DEPRECATED!!!!
107  bool eventHandler(GdkEvent* e, Node n);
108
109  ///actual event handler
110  ///
111  ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
112  sigc::connection actual_handler;
113
114  ///event handler for the case when move-tool is active
115  bool moveEventHandler(GdkEvent*);
116  ///event handler for the case when create_node-tool is active
117  bool createNodeEventHandler(GdkEvent*);
118  ///event handler for the case when create_edge-tool is active
119  bool createEdgeEventHandler(GdkEvent*);
120  ///event handler for the case when eraser-tool is active
121  bool eraserEventHandler(GdkEvent*);
122  ///event handler for the case when edge map editor tool is active
123  bool edgeMapEditEventHandler(GdkEvent*);
124  ///event handler for the case when node map editor tool is active
125  bool nodeMapEditEventHandler(GdkEvent*);
126
127public:
128  ///Moves the text to new place
129  void textReposition(xy<double>);
130  ///Activates an edge belonging to a BrokenEdge
131  ///
132  ///After we have activated an edge this way,
133  ///the GDC object will know, which edge is under forming
134  ///therefore it can redraw the necessarz elementy on the canvas,
135  ///for example the text belonging to the \ref BrokenEdge can be
136  ///redrawn (\ref textReposition).
137  void toggleEdgeActivity(BrokenEdge*, bool);
138
139public:
140  ///\return the actual tool in hand
141  int getActualTool();
142
143  void drawGraph();
144  void clear();
145
146  ///creates a new Nodemap
147  int addNewNodeMap(double,std::string);
148  ///creates a new Edgemap
149  int addNewEdgeMap(double,std::string);
150
151private:
152  ///Deletes the given element.
153  void deleteItem(Node);
154  ///Deletes the given element.
155  void deleteItem(Edge);
156
157private:
158
159  ///Map of nodes of graph
160  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
161
162  ///Map of edges of graph
163  Graph::EdgeMap<BrokenEdge *> edgesmap;
164
165  ///Map of texts to write on edges
166  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
167
168  ///Map of texts to write on nodes
169  Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
170
171  ///Group of graphical elements of displayed_graph
172  Gnome::Canvas::Group displayed_graph;
173
174private:
175  ///Indicates whether the button of mouse is pressed or not
176  int isbutton;
177
178  ///Stores the actual tool in hand
179  int actual_tool;
180
181  ///At this location was the mousebutton pressed.
182  ///It helps to calculate the distance of dragging.
183  double clicked_x, clicked_y;
184
185  ///Remembers which Gnome::Canvas::Item was pressed.
186  ///this variable is needed, because
187  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
188  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
189  Gnome::Canvas::Item * active_item, * target_item;
190  Node active_node;
191  Edge active_edge;
192  Edge forming_edge;
193
194  std::string nodemap_to_edit, edgemap_to_edit;
195
196  static const int zoom_step = 5;
197
198private:
199
200  ///reference to the parent window
201  NoteBookTab & mytab;
202
203  XY GraphDisplayerCanvas::calcArrowPos(XY, XY, XY, XY, bool);
204};
205
206#endif //GRAPH_DISPLAYER_CANVAS_H
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