Add grid lines
[ipdf/code.git] / src / view.cpp
1 #include "view.h"
2
3 #include "SDL_opengl.h"
4
5 using namespace IPDF;
6 using namespace std;
7
8 void View::Translate(Real x, Real y)
9 {
10         x *= m_bounds.w;
11         y *= m_bounds.h;
12         m_bounds.x += x;
13         m_bounds.y += y;
14 }
15
16 void View::ScaleAroundPoint(Real x, Real y, Real scaleAmt)
17 {
18         // Convert to local coords.
19         x *= m_bounds.w;
20         y *= m_bounds.h;
21         x += m_bounds.x;
22         y += m_bounds.y;
23         
24         Debug("Mouse wheel event %f %f %f\n", Float(x), Float(y), Float(scaleAmt));
25         
26         Real top = y - m_bounds.y;
27         Real left = x - m_bounds.x;
28         
29         top *= scaleAmt;
30         left *= scaleAmt;
31         
32         m_bounds.x = x - left;
33         m_bounds.y = y - top;
34         m_bounds.w *= scaleAmt;
35         m_bounds.h *= scaleAmt;
36 }
37
38 void View::DrawGrid()
39 {
40         // Draw some grid lines at fixed pixel positions
41         glMatrixMode(GL_PROJECTION);
42         glLoadIdentity();
43         glOrtho(0.0, 1.0, 1.0, 0.0, -1.f, 1.f);
44         glMatrixMode(GL_MODELVIEW);
45         glLoadIdentity();
46
47         glColor4f(0.9,0.9,0.9,0.1);
48         const float num_lines = 50.0;
49         for (float i = 0; i < num_lines; ++i)
50         {
51                 glBegin(GL_LINES);
52                 glVertex2f(i*(1.0/num_lines), 0.0);
53                 glVertex2f(i*(1.0/num_lines), 1.0);
54                 glEnd();
55                 glBegin(GL_LINES);
56                 glVertex2f(0.0,i*(1.0/num_lines));
57                 glVertex2f(1.0,i*(1.0/num_lines));
58                 glEnd();
59         
60         }
61 }
62
63 void View::Render()
64 {
65         static bool debug_output_done = false;
66         if (!debug_output_done)
67         {
68                 m_document.DebugDumpObjects();
69                 debug_output_done = true;
70         }
71
72         glClearColor(1.f,1.f,1.f,1.f);
73         glClear(GL_COLOR_BUFFER_BIT);
74
75         DrawGrid(); // Draw the gridlines
76
77         glMatrixMode(GL_PROJECTION);
78         glLoadIdentity();
79         glOrtho(Float(m_bounds.x), Float(m_bounds.x)+Float(m_bounds.w), Float(m_bounds.y) + Float(m_bounds.h), Float(m_bounds.y), -1.f, 1.f);
80         glMatrixMode(GL_MODELVIEW);
81         glLoadIdentity();
82
83
84
85
86         glColor4f(0.f,0.f,0.f,1.f);
87         glBegin(GL_QUADS);
88         for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
89         {
90                 if (m_document.m_objects.types[id] == RECT_FILLED)
91                         continue;
92                 Rect obj_bounds = m_document.m_objects.bounds[id];
93                 glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y));
94                 glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y));
95                 glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y) + Float(obj_bounds.h));
96                 glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y) + Float(obj_bounds.h));
97         }
98         glEnd();
99
100         
101         for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
102         {
103                 if (m_document.m_objects.types[id] == RECT_OUTLINE)
104                         continue;
105                 Rect obj_bounds = m_document.m_objects.bounds[id];
106                 glBegin(GL_LINE_LOOP);
107                 glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y));
108                 glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y));
109                 glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y) + Float(obj_bounds.h));
110                 glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y) + Float(obj_bounds.h));
111                 glEnd();
112         }
113
114 }

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