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Bug 1264193 - Add extra check for DPI changes during window drag, because we sometimes miss a WM_DPICHANGED message. r=emk a=ritu

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This commit is contained in:
Jonathan Kew 2016-04-15 19:54:31 +01:00
parent b33894510c
commit e9820b4ca2
1 changed files with 11 additions and 0 deletions
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11
widget/windows/nsWindow.cpp
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@ -5371,6 +5371,16 @@ nsWindow::ProcessMessage(UINT msg, WPARAM& wParam, LPARAM& lParam,
case WM_MOVING: case WM_MOVING:
FinishLiveResizing(MOVING); FinishLiveResizing(MOVING);
if (WinUtils::IsPerMonitorDPIAware()) {
// Sometimes, we appear to miss a WM_DPICHANGED message while moving
// a window around. Therefore, call ChangedDPI and ResetLayout here,
// which causes the prescontext and appshell window management code to
// check the appUnitsPerDevPixel value and current widget size, and
// refresh them if necessary. If nothing has changed, these calls will
// return without actually triggering any extra reflow or painting.
ChangedDPI();
ResetLayout();
}
break; break;
case WM_ENTERSIZEMOVE: case WM_ENTERSIZEMOVE:
@ -6927,6 +6937,7 @@ nsWindow::OnDPIChanged(int32_t x, int32_t y, int32_t width, int32_t height)
Resize(x, y, width, height, true); Resize(x, y, width, height, true);
} }
ChangedDPI(); ChangedDPI();
ResetLayout();
} }
/************************************************************** /**************************************************************