git.mutantstargoat.com Git - freeglut/blob - progs/demos/Resizer/Resizer.cpp

   1 #include <stdio.h>\r
   2 \r
   3 #include <GL/freeglut.h>\r
   4 \r
   5 int nWindow, nChildWindow = -1;\r
   6 int nLoopMain = 0;\r
   7 \r
   8 int nPosX,  nPosY;\r
   9 int nWidth, nHeight;\r
  10 \r
  11 GLboolean bChildPosDone = GL_FALSE, bChildSizeDone = GL_FALSE;\r
  12 \r
  13 void SampleKeyboard( unsigned char cChar, int nMouseX, int nMouseY );\r
  14 void Redisplay();\r
  15 void Reshape(int x, int y);\r
  16 \r
  17 \r
  18 \r
  19 \r
  20 void DrawQuad()\r
  21 {\r
  22     nWidth  = glutGet(GLUT_WINDOW_WIDTH);\r
  23     nHeight = glutGet(GLUT_WINDOW_HEIGHT);\r
  24 \r
  25     glBegin(GL_QUADS);\r
  26         glVertex2d(nWidth*.25, nHeight*.75);\r
  27         glVertex2d(nWidth*.75, nHeight*.75);\r
  28         glVertex2d(nWidth*.75, nHeight*.25);\r
  29         glVertex2d(nWidth*.25, nHeight*.25);\r
  30     glEnd();\r
  31 }\r
  32 \r
  33 void SampleKeyboard( unsigned char cChar, int nMouseX, int nMouseY )\r
  34 {\r
  35     switch (cChar)\r
  36     {\r
  37     case 27:\r
  38         glutLeaveMainLoop();\r
  39 \r
  40         break;\r
  41 \r
  42 \r
  43     case 'f':\r
  44     case 'F':\r
  45         printf("main window toggle fullscreen\n");\r
  46         glutFullScreenToggle();\r
  47 \r
  48         break;\r
  49 \r
  50 \r
  51     case 'r':\r
  52     case 'R':\r
  53         if (nChildWindow!=-1)\r
  54         {\r
  55             glutSetWindow(nChildWindow);\r
  56             printf("child window resize\n");\r
  57             if (!bChildSizeDone)\r
  58                 glutReshapeWindow(glutGet(GLUT_WINDOW_WIDTH)+50,glutGet(GLUT_WINDOW_HEIGHT)+50);\r
  59             else\r
  60                 glutReshapeWindow(glutGet(GLUT_WINDOW_WIDTH)-50,glutGet(GLUT_WINDOW_HEIGHT)-50);\r
  61             bChildSizeDone = !bChildSizeDone;\r
  62         }\r
  63         else\r
  64         {\r
  65             printf("main window resize\n");\r
  66             if (nWidth<400)\r
  67                 glutReshapeWindow(600,300);\r
  68             else\r
  69                 glutReshapeWindow(300,300);\r
  70         }\r
  71 \r
  72         break;\r
  73 \r
  74 \r
  75     case 'm':\r
  76     case 'M':\r
  77         if (nChildWindow!=-1)\r
  78         {\r
  79             glutSetWindow(nChildWindow);\r
  80 \r
  81             /* The window position you request is relative to the top-left\r
  82              * corner of the client area of the parent window.\r
  83              */\r
  84             if (!bChildPosDone)\r
  85                 glutPositionWindow(glutGet(GLUT_WINDOW_X)+50,glutGet(GLUT_WINDOW_Y)+50);\r
  86             else\r
  87                 glutPositionWindow(glutGet(GLUT_WINDOW_X)-50,glutGet(GLUT_WINDOW_Y)-50);\r
  88             bChildPosDone = !bChildPosDone;\r
  89         }\r
  90         else\r
  91         {\r
  92             printf("main window position\n");\r
  93 \r
  94             /* The window position you request is the outer top-left of the window,\r
  95              * the client area is at a different position if the window has borders\r
  96              * and/or a title bar.\r
  97              */\r
  98             if (nPosX<400)\r
  99                 glutPositionWindow(600,300);\r
 100             else\r
 101                 glutPositionWindow(300,300);\r
 102         }\r
 103 \r
 104         break;\r
 105 \r
 106 \r
 107     case 'c':\r
 108     case 'C':\r
 109         if (nChildWindow==-1)\r
 110         {\r
 111             /* open child window */\r
 112             printf("open child window\n");\r
 113             nWidth  = glutGet(GLUT_WINDOW_WIDTH);\r
 114             nHeight = glutGet(GLUT_WINDOW_HEIGHT);\r
 115 \r
 116             nChildWindow = glutCreateSubWindow(nWindow,(int)(nWidth*.35),(int)(nHeight*.35),(int)(nWidth*.3),(int)(nHeight*.3));\r
 117             glutKeyboardFunc( SampleKeyboard );\r
 118             glutDisplayFunc( Redisplay );\r
 119             glutReshapeFunc( Reshape );\r
 120         }\r
 121         else\r
 122         {\r
 123             /* close child window */\r
 124             printf("close child window\n");\r
 125             glutSetWindow(nWindow);\r
 126             glutDestroyWindow(nChildWindow);\r
 127             nChildWindow = -1;\r
 128             bChildSizeDone = GL_FALSE;\r
 129             bChildPosDone  = GL_FALSE;\r
 130         }\r
 131         break;\r
 132 \r
 133 \r
 134     default:\r
 135         break;\r
 136     }\r
 137 }\r
 138 \r
 139 void Idle(void)\r
 140 {\r
 141     glutPostRedisplay();\r
 142 }\r
 143 \r
 144 void Reshape(int x, int y)\r
 145 {\r
 146     int win = glutGetWindow();\r
 147 \r
 148     nWidth  = glutGet(GLUT_WINDOW_WIDTH);\r
 149     nHeight = glutGet(GLUT_WINDOW_HEIGHT);\r
 150     printf("reshape %s, %dx%d\n",win==nWindow?"main":"child",\r
 151         nWidth, nHeight);\r
 152 \r
 153     glViewport(0,0,nWidth,nHeight);\r
 154     glMatrixMode(GL_PROJECTION);\r
 155     glLoadIdentity();\r
 156     gluOrtho2D(0,nWidth,0,nHeight);\r
 157 \r
 158     if (win==nWindow && nChildWindow!=-1)\r
 159     {\r
 160         glutSetWindow(nChildWindow);\r
 161         glutPositionWindow((int)(nWidth*.35),(int)(nHeight*.35));\r
 162         glutReshapeWindow((int)(nWidth*.3),(int)(nHeight*.3));\r
 163         glutSetWindow(nWindow);\r
 164     }\r
 165 }\r
 166 \r
 167 void Redisplay(void)\r
 168 {\r
 169     int win = glutGetWindow();\r
 170 \r
 171     if (nLoopMain++%20==0)\r
 172     {\r
 173         int border, caption;\r
 174 \r
 175         nPosX   = glutGet(GLUT_WINDOW_X);\r
 176         nPosY   = glutGet(GLUT_WINDOW_Y);\r
 177         nWidth  = glutGet(GLUT_WINDOW_WIDTH);\r
 178         nHeight = glutGet(GLUT_WINDOW_HEIGHT);\r
 179         border  = glutGet(GLUT_WINDOW_BORDER_WIDTH);\r
 180         caption = glutGet(GLUT_WINDOW_HEADER_HEIGHT);\r
 181         /* returned position is top-left of client area, to get top-left of\r
 182          * of window you'll need to add the size of the border and caption\r
 183          * of the current window (can be 0).\r
 184          * Note that the window position is not necessarily positive (e.g.\r
 185          * when the window is on a monitor to the left of the primary monitor\r
 186          * or simply when maximized--try pressing the maximize button).\r
 187          * the returned size is the size of the client area\r
 188          */\r
 189         if (win==nWindow)\r
 190             printf("main  window %dx%d, top-left of client at: (%d,%d), of window at: (%d,%d)\n",\r
 191                 nWidth, nHeight,\r
 192                 nPosX ,nPosY,\r
 193                 nPosX-border,\r
 194                 nPosY-border-caption);\r
 195         else\r
 196             printf("child window %dx%d, top-left of client at: (%d,%d), relative to parent\n",\r
 197             nWidth, nHeight,\r
 198             nPosX ,nPosY);\r
 199     }\r
 200 \r
 201     if (win==nWindow)\r
 202     {\r
 203         glClearColor(.2f,0.f,0.f,0.f);\r
 204         glColor3f(1,1,1);\r
 205     }\r
 206     else\r
 207     {\r
 208         /* child window */\r
 209         glClearColor(.0f,.2f,0.f,0.f);\r
 210         glColor3f(.5,.5,.5);\r
 211         glutPostWindowRedisplay(nWindow);\r
 212     }\r
 213     glClear(GL_COLOR_BUFFER_BIT);\r
 214     DrawQuad();\r
 215 \r
 216     glutSwapBuffers();\r
 217     glutPostWindowRedisplay(win);\r
 218 }\r
 219 \r
 220 \r
 221 int main(int argc, char* argv[])\r
 222 {\r
 223     glutInit( &argc, argv );\r
 224     glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE /*| GLUT_BORDERLESS*/); // do try as well with GLUT_BORDERLESS and GLUT_CAPTIONLESS\r
 225     glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE,GLUT_ACTION_GLUTMAINLOOP_RETURNS);\r
 226 \r
 227     /* The window position you request is the outer top-left of the window,\r
 228      * the client area is at a different position if the window has borders\r
 229      * and/or a title bar.\r
 230      */\r
 231     glutInitWindowPosition(150,250);\r
 232     glutInitWindowSize(200,200);\r
 233 \r
 234     nWindow = glutCreateWindow("test");\r
 235     printf("main window id: %d\n", nWindow);\r
 236 \r
 237     glutKeyboardFunc( SampleKeyboard );\r
 238     glutDisplayFunc( Redisplay );\r
 239     glutReshapeFunc( Reshape );\r
 240 \r
 241     glutMainLoop();\r
 242     printf("glutMainLoop returned\n");\r
 243 \r
 244     return EXIT_SUCCESS;\r
 245 }