src/main.h

   1 #include "common.h"
   2
   3 #include "document.h"
   4 #include "view.h"
   5 #include "screen.h"
   6
   7
   8 using namespace std;
   9 using namespace IPDF;
  10
  11 inline void MainLoop(Document & doc)
  12 {
  13         View view(doc);
  14         Screen scr;
  15         scr.SetMouseHandler([&](int x, int y, int buttons, int wheel)
  16         {
  17                 static bool oldButtonDown = false;
  18                 static int oldx, oldy;
  19                 if (buttons && !oldButtonDown)
  20                 {
  21                         // We're beginning a drag.
  22                         oldButtonDown = true;
  23                         oldx = x;
  24                         oldy = y;
  25                         scr.SetMouseCursor(Screen::CursorMove);
  26                 }
  27                 if (buttons)
  28                 {
  29                         view.Translate(Real(oldx-x)/Real(scr.ViewportWidth()), Real(oldy-y)/Real(scr.ViewportHeight()));
  30                 }
  31                 else
  32                 {
  33                         oldButtonDown = false;
  34                         scr.SetMouseCursor(Screen::CursorArrow);
  35                 }
  36                 oldx = x;
  37                 oldy = y;
  38
  39                 if (wheel)
  40                 {
  41                         view.ScaleAroundPoint(Real(x)/Real(scr.ViewportWidth()),Real(y)/Real(scr.ViewportHeight()), expf(-wheel/20.f));
  42                 }
  43         }
  44         );
  45         while (scr.PumpEvents())
  46         {
  47                 view.Render();
  48                 scr.Present();
  49         }
  50 }