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8301616: Drag & maximize to another monitor places window incorrectly (Windows)

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Reviewed-by: avu, aivanov, serb
This commit is contained in:
Nikita Gubarkov 2023-04-05 13:41:51 +00:00 committed by Alexey Ushakov
parent a3137c750f
commit f69d88c57f
1 changed files with 14 additions and 0 deletions

14
src/java.desktop/windows/native/libawt/windows/awt_Window.cpp

@ -371,6 +371,20 @@ void AwtWindow::RepositionSecurityWarning(JNIEnv *env)
MsgRouting AwtWindow::WmWindowPosChanged(LPARAM windowPos) {
WINDOWPOS * wp = (WINDOWPOS *)windowPos;
// There's no good way to detect partial maximization (e.g. Aero Snap),
// but by inspecting SWP_* flags we can guess it and reset
// prevScaleRec to neutralize the CheckWindowDPIChange logic.
// Here are the flags, observed on Windows 11 for reference:
// Restore/maximize: SWP_NOZORDER | SWP_DRAWFRAME
// Partial Aero Snap: SWP_NOZORDER | SWP_NOREPOSITION
// DPI change (new screen): SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOCOPYBITS
if (!(wp->flags & (SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE)) &&
prevScaleRec.screen != -1 && prevScaleRec.screen != m_screenNum) {
prevScaleRec.screen = -1;
prevScaleRec.scaleX = -1.0f;
prevScaleRec.scaleY = -1.0f;
}
// Reposition the warning window
if (IsUntrusted() && warningWindow != NULL) {
if (wp->flags & SWP_HIDEWINDOW) {