+ return;
+ }
+ if (buttons == 2 && !oldButtonDown)
+ {
+ oldButtonDown = true;
+ view->ToggleGPURendering();
+ oldx = x;
+ oldy = y;
+ }
+ if (buttons && !oldButtonDown)
+ {
+ // We're beginning a drag.
+ oldButtonDown = true;
+ oldx = x;
+ oldy = y;
+ scr->SetMouseCursor(Screen::CursorMove);
+ }
+ if (buttons)
+ {
+ #if REAL >= REAL_RATIONAL
+ view->Translate(Real(oldx, scr->ViewportWidth()) -Real(x,scr->ViewportWidth()), Real(oldy, scr->ViewportHeight()) - Real(y,scr->ViewportHeight()));
+ #else
+ view->Translate(Real(oldx-x)/Real(scr->ViewportWidth()), Real(oldy-y)/Real(scr->ViewportHeight()));
+ #endif
+ }
+ else
+ {
+ oldButtonDown = false;
+ scr->SetMouseCursor(Screen::CursorArrow);
+ }
+ oldx = x;
+ oldy = y;