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Continuously scroll map with two fingers

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This commit is contained in:
pelya
2014-11-10 17:57:43 +02:00
parent 396aebaa98
commit 55d31f06fb
4 changed files with 23 additions and 0 deletions
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19
src/window.cpp
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@@ -2777,6 +2777,24 @@ static void HandleAutoscroll()
#undef scrollspeed
}
/**
* Perform small continuous scrolling with right button press and drag.
*/
static void HandleContinuousScroll()
{
#define scrollspeed 0.05f
if (_scrolling_viewport && _right_button_down) {
Window *w = FindWindowFromPt(_right_button_down_pos.x, _right_button_down_pos.y);
if (w == NULL || w->flags & WF_DISABLE_VP_SCROLL) return;
ViewPort *vp = IsPtInWindowViewport(w, _right_button_down_pos.x, _right_button_down_pos.y);
if (vp == NULL) return;
w->viewport->dest_scrollpos_x += ScaleByZoom(scrollspeed * (_right_button_down_pos.x - _cursor.pos.x), vp->zoom);
w->viewport->dest_scrollpos_y += ScaleByZoom(scrollspeed * (_right_button_down_pos.y - _cursor.pos.y), vp->zoom);
}
#undef scrollspeed
}
enum MouseClick {
MC_NONE = 0,
MC_LEFT,
@@ -3096,6 +3114,7 @@ void InputLoop()
/* HandleMouseEvents was already called for this tick */
HandleMouseEvents();
HandleAutoscroll();
HandleContinuousScroll();
}
/**