[1412] | 1 | // -*- C++ -*- //
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| 2 |
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| 3 | #ifndef GRAPH_DISPLAYER_CANVAS_H
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| 4 | #define GRAPH_DISPLAYER_CANVAS_H
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| 5 |
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| 6 | #include <all_include.h>
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| 7 | #include <mapstorage.h>
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| 8 | #include <libgnomecanvasmm.h>
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| 9 | #include <libgnomecanvasmm/polygon.h>
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| 10 |
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[1440] | 11 | ///This class is the canvas, on which the graph can be drawn.
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[1412] | 12 | class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
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| 13 | {
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| 14 | typedef Gnome::Canvas::CanvasAA Parent;
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| 15 |
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| 16 | public:
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| 17 | GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
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| 18 | virtual ~GraphDisplayerCanvas();
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| 19 |
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[1440] | 20 | ///Changes the linewidth attribute according to the given map.
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| 21 | ///\param mapname is the name of the map which contains the new values
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[1412] | 22 | int changeLineWidth (std::string mapname);
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[1440] | 23 |
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| 24 | ///Changes the linecolor attribute according to the given map.
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| 25 | ///\param mapname is the name of the map which contains the new values
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[1412] | 26 | int changeColor (std::string mapname);
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[1440] | 27 |
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| 28 | ///Changes the text of line attribute according to the given map.
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| 29 | ///\param mapname is the name of the map which contains the new values
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[1412] | 30 | int changeText (std::string mapname);
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[1440] | 31 |
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[1441] | 32 | ///Callback for 'ViewZoomIn' action.
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| 33 | virtual void zoomIn();
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| 34 | ///Callback for 'ViewZoomOut' action.
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| 35 | virtual void zoomOut();
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| 36 | ///Callback for 'ViewZoomFit' action.
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| 37 | virtual void zoomFit();
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| 38 | ///Callback for 'ViewZoom100' action.
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| 39 | virtual void zoom100();
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| 40 | ///Sets the scroll region of the convas to the bounding box of the graph.
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| 41 | void updateScrollRegion();
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[1412] | 42 |
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| 43 | protected:
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| 44 |
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[1440] | 45 | //maximizing, minimizing, restoring window, etc.
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[1412] | 46 | virtual bool on_expose_event(GdkEventExpose *);
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| 47 |
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| 48 | private:
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| 49 |
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[1440] | 50 | ///This function is responsible for the correct
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| 51 | ///reaction of any action happened in the territory
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| 52 | ///of the canvas
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[1412] | 53 | bool event_handler(GdkEvent* e, Node n);
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| 54 |
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| 55 | ///The graph, on which we work
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| 56 | Graph g;
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[1440] | 57 |
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| 58 | ///Map of nodes of graph
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[1412] | 59 | Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
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[1440] | 60 |
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| 61 | ///Map of edges of graph
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[1412] | 62 | Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
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| 63 |
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| 64 | ///Map of texts to write on edges
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| 65 | Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
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| 66 |
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| 67 | ///Group of graphical elements of displayed_graph
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| 68 | Gnome::Canvas::Group displayed_graph;
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| 69 |
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| 70 | ///Here we store the maps that can be displayed through properties.
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| 71 | MapStorage mapstorage;
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| 72 |
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| 73 | ///Indicates whether the button of mouse is pressed or not
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| 74 | bool isbutton;
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| 75 |
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| 76 | ///At this location was the mousebutton pressed.
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| 77 | ///It helps to calculate the distance of dragging.
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| 78 | double clicked_x, clicked_y;
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| 79 |
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| 80 | ///Remembers which Gnome::Canvas::Item was pressed.
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| 81 | ///this variable is needed, because
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| 82 | ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
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| 83 | ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
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| 84 | Gnome::Canvas::Item * active_item;
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| 85 |
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[1441] | 86 | static const int zoom_step = 5;
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[1412] | 87 | };
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| 88 |
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| 89 | #endif //GRAPH_DISPLAYER_CANVAS_H
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