Node and edge editor button are the same furthermore.
3 #ifndef GRAPH_DISPLAYER_CANVAS_H
4 #define GRAPH_DISPLAYER_CANVAS_H
6 class GraphDisplayerCanvas;
8 #include "all_include.h"
10 #include <libgnomecanvasmm.h>
11 #include <libgnomecanvasmm/polygon.h>
14 ///This class is the canvas, on which the graph can be drawn.
15 class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
17 friend class BrokenEdge;
18 friend class LoopEdge;
20 class EdgeBase : public Gnome::Canvas::Group
23 ///Reference to the canvas, on which the graph is drawn.
25 ///It is needed, because some datas needed from
26 ///graph can be accessed by this or should be sent
27 ///as parameter, but it would be complicated
28 GraphDisplayerCanvas& canvas;
30 ///The edge that the class displays.
32 ///It is needed, because some datas needed from
33 ///graph can be accessed by this or should be sent
34 ///as parameter, but it would be complicated
37 Gnome::Canvas::Polygon arrow;
41 EdgeBase(Gnome::Canvas::Group&, Edge, GraphDisplayerCanvas&);
43 virtual void draw() = 0;
44 virtual void setLineWidth(int) = 0;
45 virtual void setFillColor(Gdk::Color) = 0;
46 virtual Gnome::Canvas::Item * getLine() = 0;
49 ///Edge displayer class
51 ///This class is responsible for displaying edges in graph.
52 ///The displayed edge is broken in the middle. The
53 ///aim of this is to be able to indicate direction of edges
54 ///and to be able to display more then one edges between the
55 ///same source and target
56 class BrokenEdge : public EdgeBase
59 Gnome::Canvas::Line line;
61 ///Indicates whether the button of mouse is pressed or not at the moment.
64 ///At this location was the mousebutton pressed. Horizontal component.
66 ///It helps to calculate the
67 ///distance of dragging.
70 ///At this location was the mousebutton pressed. Vertical component.
72 ///It helps to calculate the
73 ///distance of dragging.
76 ///event handler for forming broken edges
80 bool edgeFormerEventHandler(GdkEvent* event);
83 ///Constructor of broken edge class.
85 ///\param g the group to which the edge belongs
86 ///\param _edge the represented edge
87 ///\param gc the canvas
88 BrokenEdge(Gnome::Canvas::Group&, Edge, GraphDisplayerCanvas&);
90 ///Destructor of broken edge class
96 ///The function that draws the edge based on collected data
99 void setLineWidth(int);
100 void setFillColor(Gdk::Color);
102 Gnome::Canvas::Item * getLine() { return (Gnome::Canvas::Item *)(&line); };
105 class LoopEdge : public EdgeBase
108 Gnome::Canvas::Ellipse line;
110 LoopEdge(Gnome::Canvas::Group&, Edge, GraphDisplayerCanvas&);
113 void setLineWidth(int);
114 void setFillColor(Gdk::Color);
115 Gnome::Canvas::Item * getLine() { return (Gnome::Canvas::Item *)(&line); };
118 ///Type of canvas, on which the graph is drawn
119 typedef Gnome::Canvas::CanvasAA Parent;
124 ///\param nbt the tab of the window, in which the graph is displayed
125 GraphDisplayerCanvas(NoteBookTab & nbt);
127 ///destructor of the class
128 virtual ~GraphDisplayerCanvas();
130 ///Changes the width of edge(s) according to the given map.
132 ///\param mapname is the name of the map which contains the values to be set
133 ///\param edge if it is given, only the width of the given edge will be set, instead of all of them.
134 int changeEdgeWidth (std::string mapname, Edge edge=INVALID);
136 ///Resets width of edge(s) to the default value
138 ///\param edge if it is given, only the width of the
139 ///given edge will be reset, instead of all of them.
140 int resetEdgeWidth (Edge edge=INVALID);
142 ///Changes the color of edge(s) according to the given map.
144 ///\param mapname is the name of the map which contains the new values
145 ///\param edge if it is given, only the color of the given edge will be set, instead of all of them.
146 int changeEdgeColor (std::string mapname, Edge edge=INVALID);
148 ///Resets color of edge(s) to the default value
150 ///\param edge if it is given, only the color of the
151 ///given edge will be reset, instead of all of them.
152 int resetEdgeColor (Edge edge=INVALID);
154 ///Changes the label of edge(s) according to the given map.
156 ///\param mapname is the name of the map which contains the new values
157 ///\param edge if it is given, only the label of the given edge will be set, instead of all of them.
158 int changeEdgeText (std::string mapname, Edge edge=INVALID);
160 ///Resets label of edge(s) to the default value
162 ///\param edge if it is given, only the color of the
163 ///given edge will be reset, instead of all of them.
164 int resetEdgeText (Edge edge=INVALID);
166 ///Changes the radius of node(s) according to the given map.
168 ///\param mapname is the name of the map which contains the new values
169 ///\param node if it is given, only the radius of the given node will be set, instead of all of them.
170 int changeNodeRadius (std::string mapname, Node node=INVALID);
172 ///Resets radius of node(s) to the default value
174 ///\param node if it is given, only the radius of the
175 ///given node will be reset, instead of all of them.
176 int resetNodeRadius (Node node=INVALID);
178 ///Changes the color of node(s) according to the given map.
180 ///\param mapname is the name of the map which contains the new values
181 ///\param node if it is given, only the color of the given node will be set, instead of all of them.
182 int changeNodeColor (std::string mapname, Node node=INVALID);
184 ///Resets color of node(s) to the default value
186 ///\param node if it is given, only the color of the
187 ///given node will be reset, instead of all of them.
188 int resetNodeColor (Node node=INVALID);
190 ///Changes the label of node(s) according to the given map.
192 ///\param mapname is the name of the map which contains the new values
193 ///\param node if it is given, only the label of the given node will be set, instead of all of them.
194 int changeNodeText (std::string mapname, Node node=INVALID);
196 ///Resets label of node(s) to the default value
198 ///\param node if it is given, only the label of the
199 ///given node will be reset, instead of all of them.
200 int resetNodeText (Node node=INVALID);
202 ///This function is called, when any of the displayed attributes have to be updated, or changed
204 ///\param itisedge if true, edge property has to be changed, else node property
205 ///\param prop the id of property that has to changed or updated
206 void propertyChange(bool itisedge, int prop);
208 ///updates the given property
210 ///\param edge if it is not INVALID, only the property of the given edge will be updated, instead of all of them
211 ///\param prop the property to update
212 void propertyUpdate(Edge edge, int prop);
214 ///updates the given property
216 ///\param node if it is not INVALID, only the property of the given node will be updated, instead of all of them
217 ///\param prop the property to update
218 void propertyUpdate(Node node, int prop);
220 ///updates all the property for the given edge
221 void propertyUpdate(Edge);
223 ///updates all the property for the given node
224 void propertyUpdate(Node);
226 ///Callback for 'ViewZoomIn' action.
227 virtual void zoomIn();
228 ///Callback for 'ViewZoomOut' action.
229 virtual void zoomOut();
230 ///Callback for 'ViewZoomFit' action.
231 virtual void zoomFit();
232 ///Callback for 'ViewZoom100' action.
233 virtual void zoom100();
234 ///Sets the scroll region of the convas to the bounding box of the graph.
235 void updateScrollRegion();
237 ///This function changes the tool in the graph-editor's hand
238 void changeEditorialTool(int);
242 //maximizing, minimizing, restoring window, etc.
243 virtual bool on_expose_event(GdkEventExpose *);
247 ///This function is responsible for the correct
248 ///reaction of any action happened in the territory
251 bool eventHandler(GdkEvent* e, Node n);
253 ///actual event handler
255 ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
256 sigc::connection actual_handler;
258 ///event handler for the case when move-tool is active
259 bool moveEventHandler(GdkEvent*);
260 ///event handler for the case when create_node-tool is active
261 bool createNodeEventHandler(GdkEvent*);
262 ///event handler for the case when create_edge-tool is active
263 bool createEdgeEventHandler(GdkEvent*);
264 ///event handler for the case when eraser-tool is active
265 bool eraserEventHandler(GdkEvent*);
266 ///event handler for the case when map editor tool is active
267 bool mapEditEventHandler(GdkEvent*);
270 ///Moves the text to new place
271 void textReposition(xy<double>);
273 ///Activates an edge belonging to an EdgeBase
275 ///After we have activated an edge this way,
276 ///the GDC object will know, which edge is under forming
277 ///therefore it can redraw the necessary elements on the canvas,
278 ///for example the text belonging to the \ref EdgeBase can be
279 ///redrawn (\ref textReposition).
280 void toggleEdgeActivity(EdgeBase*, bool);
284 ///Returns the actual tool in hand
289 ///Called when opening a file.
294 ///It achieves this by deleting all data
295 ///structure used to help handle the displayed graph.
298 ///creates a new Nodemap
300 ///\param init initial value of the map
301 ///\param mapname name of new map
302 int addNewNodeMap(double init,std::string mapname);
303 ///creates a new Edgemap
305 ///\param init initial value of the map
306 ///\param mapname name of new map
307 int addNewEdgeMap(double init,std::string mapname);
310 ///Deletes the given element.
311 void deleteItem(Node);
312 ///Deletes the given element.
313 void deleteItem(Edge);
317 ///Map of nodes of graph
318 Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
320 ///Map of edges of graph
321 Graph::EdgeMap<EdgeBase*> edgesmap;
323 ///Map of texts to write on edges
324 Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
326 ///Map of texts to write on nodes
327 Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
329 ///Group of graphical elements of displayed_graph
330 Gnome::Canvas::Group displayed_graph;
333 ///Indicates whether the button of mouse is pressed or not
336 ///Stores the actual tool in hand
339 ///At this location was the mousebutton pressed.
340 ///It helps to calculate the distance of dragging.
341 double clicked_x, clicked_y;
343 ///Remembers which Gnome::Canvas::Item was pressed.
345 ///this variable is needed, to work on it after selection
346 Gnome::Canvas::Item * active_item;
348 ///Remembers which Gnome::Canvas::Item was pressed.
350 ///this variable is used at edge creation, it will
351 ///be the secondly selected node. No local variable
352 ///can be used for this purpose inside the function,
353 ///because the node selected by button press, and
354 ///the edge is created by button release. Both of
355 ///them is different function call.
356 Gnome::Canvas::Item * target_item;
358 ///selected node (for any editing)
361 ///selected edge (for any editing)
364 ///the edge that is selected by clicking on the red arrow in the middle of it
366 ///This edge is stored only for the purpose of reshape it.
367 ///That is why it is selected in a different manner.
370 ///Map displayed by label can be edited.
371 std::string nodemap_to_edit;
373 ///Map displayed by label can be edited.
374 std::string edgemap_to_edit;
376 static const int zoom_step = 5;
380 ///reference to the container, in which the canvas is
383 XY calcArrowPos(XY, XY, XY, XY, int);
386 #endif //GRAPH_DISPLAYER_CANVAS_H