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Fix: enable pinch-to-zoom on precision touchpads #29

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Fix: enable pinch-to-zoom on precision touchpads #29

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7 changes: 5 additions & 2 deletions TextControlBox/Core/PointerActionsManager.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -428,8 +428,11 @@ public void PointerWheelAction(ZoomManager zoomManager, PointerRoutedEventArgs e
{
var delta = e.GetCurrentPoint(coreTextbox.canvasSelection).Properties.MouseWheelDelta;
bool needsUpdate = false;
//Zoom using mousewheel
if (Utils.IsKeyPressed(VirtualKey.Control))
//Zoom using mousewheel or a precision-touchpad pinch. A pinch gesture is delivered by
//Windows as a Ctrl-modified wheel, but that Control comes from the wheel message
//(e.KeyModifiers), not the physical keyboard state, so Utils.IsKeyPressed alone misses it.
//Check both so pinch-to-zoom works on precision touchpads.
if (Utils.IsKeyPressed(VirtualKey.Control) || e.KeyModifiers.HasFlag(VirtualKeyModifiers.Control))
{
zoomManager._ZoomFactor += delta / 20;
zoomManager.UpdateZoom();
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