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Resize the drag bar on WM_DISPLAYCHANGE #4829

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Mar 6, 2020
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5 changes: 5 additions & 0 deletions src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -480,6 +480,11 @@ void NonClientIslandWindow::_UpdateFrameMargins() const noexcept
{
switch (message)
{
case WM_DISPLAYCHANGE:
// GH#4166: When the DPI of the monitor changes out from underneath us,
// resize our drag bar, to reflect its newly scaled size.
_UpdateIslandRegion();
return 0;
case WM_NCCALCSIZE:
return _OnNcCalcSize(wParam, lParam);
case WM_NCHITTEST:
Expand Down