1 | // This example was started by Guillaume Laurent. |
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2 | // It has become a place to dump code that tests parts of the |
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3 | // gnomemm canvas code. Little thought has been given to the |
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4 | // actual on-screen output. |
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5 | |
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6 | #include <libgnomecanvasmm.h> |
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7 | #include <libgnomecanvasmm/polygon.h> |
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8 | #include <iostream> |
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9 | |
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10 | class CanvasExample : public Gnome::Canvas::CanvasAA |
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11 | { |
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12 | typedef Gnome::Canvas::CanvasAA Parent; |
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13 | |
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14 | public: |
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15 | CanvasExample(); |
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16 | virtual ~CanvasExample(); |
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17 | |
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18 | private: |
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19 | bool event_handler(GdkEvent* e, bool b); |
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20 | Gnome::Canvas::Points coos; |
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21 | Gnome::Art::Point * wp; |
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22 | Gnome::Canvas::Ellipse ** nodes; |
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23 | Gnome::Canvas::Polygon * sides; |
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24 | Gnome::Canvas::Group triangle; |
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25 | }; |
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26 | |
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27 | bool CanvasExample::event_handler(GdkEvent* e, bool b) |
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28 | { |
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29 | bool isbutton=true; |
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30 | switch(e->type) |
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31 | { |
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32 | case GDK_BUTTON_PRESS: printf("Node is pressed!\n"); break; |
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33 | //case GDK_BUTTON_RELEASE: printf("Node is released!\n"); break; |
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34 | default: isbutton=false; break; |
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35 | } |
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36 | if(isbutton) |
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37 | { |
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38 | //(get_item_at(e->button.x, e->button.y))->move(5,5); |
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39 | (get_item_at(e->button.x, e->button.y))->hide(); |
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40 | } |
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41 | } |
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42 | |
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43 | CanvasExample::CanvasExample():triangle(*(root()), 0, 0) |
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44 | { |
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45 | double ax=100; |
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46 | double ay=100; |
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47 | double bx=-100; |
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48 | double by=100; |
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49 | double cx=0; |
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50 | double cy=-100; |
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51 | coos.push_back(Gnome::Art::Point(100, 100)); |
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52 | coos.push_back(Gnome::Art::Point(-100, 100)); |
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53 | coos.push_back(Gnome::Art::Point(0, -100)); |
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54 | |
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55 | sides=new Gnome::Canvas::Polygon(triangle, coos); |
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56 | *sides << Gnome::Canvas::Properties::outline_color("green"); |
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57 | sides->property_width_pixels().set_value(10); |
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58 | |
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59 | nodes=new ( Gnome::Canvas::Ellipse * ) [4]; |
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60 | |
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61 | for(int i=0; i<3;i++) |
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62 | { |
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63 | nodes[i]= new Gnome::Canvas::Ellipse(triangle, coos[i].get_x()-20, coos[i].get_y()-20, coos[i].get_x()+20, coos[i].get_y()+20); |
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64 | *(nodes[i]) << Gnome::Canvas::Properties::fill_color("blue"); |
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65 | *(nodes[i]) << Gnome::Canvas::Properties::outline_color("black"); |
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66 | (nodes[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &CanvasExample::event_handler),true)); |
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67 | } |
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68 | |
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69 | wp=new Gnome::Art::Point((ax+bx+cx)/3,(ay+by+cy)/3); |
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70 | |
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71 | nodes[3]= new Gnome::Canvas::Ellipse(triangle, wp->get_x()-20, wp->get_y()-20, wp->get_x()+20, wp->get_y()+20); |
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72 | *(nodes[3]) << Gnome::Canvas::Properties::fill_color("blue"); |
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73 | *(nodes[3]) << Gnome::Canvas::Properties::outline_color("black"); |
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74 | |
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75 | |
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76 | } |
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77 | |
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78 | CanvasExample::~CanvasExample() |
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79 | { |
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80 | } |
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81 | |
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82 | //MainWin: |
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83 | |
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84 | class MainWin : public Gtk::Window |
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85 | { |
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86 | public: |
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87 | MainWin(const std::string& title); |
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88 | |
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89 | protected: |
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90 | //Member widgets: |
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91 | CanvasExample m_canvas; |
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92 | }; |
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93 | |
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94 | MainWin::MainWin(const std::string& title) |
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95 | { |
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96 | set_title (title); |
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97 | add(m_canvas); |
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98 | set_default_size(900,600); |
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99 | |
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100 | show_all(); |
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101 | } |
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102 | |
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103 | //main(): |
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104 | |
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105 | int main(int argc, char *argv[]) |
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106 | { |
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107 | Gnome::Canvas::init(); |
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108 | Gtk::Main app(argc, argv); |
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109 | |
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110 | MainWin mainwin("Gnome::Canvas Example"); |
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111 | app.run(mainwin); |
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112 | |
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113 | return 0; |
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114 | } |
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