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windisplay: fix window size changing when switching undecorated

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rdb 2018-10-16 16:31:46 +02:00
parent bfeb5060b8
commit b569875bf9
1 changed files with 19 additions and 3 deletions
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22
panda/src/windisplay/winGraphicsWindow.cxx
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@ -293,13 +293,29 @@ set_properties_now(WindowProperties &properties) {
_properties.set_fixed_size(properties.get_fixed_size());
properties.clear_fixed_size();
}
// When switching undecorated mode, Windows will keep the window at the
// current outer size, whereas we want to keep it with the configured
// inner size. Store the current size and origin.
LPoint2i top_left = _properties.get_origin();
LPoint2i bottom_right = top_left + _properties.get_size();
DWORD window_style = make_style(_properties);
SetWindowLong(_hWnd, GWL_STYLE, window_style);
// Now calculate the proper size and origin with the new window style.
RECT view_rect;
SetRect(&view_rect, top_left[0], top_left[1],
bottom_right[0], bottom_right[1]);
WINDOWINFO wi;
GetWindowInfo(_hWnd, &wi);
AdjustWindowRectEx(&view_rect, wi.dwStyle, FALSE, wi.dwExStyle);
// We need to call this to ensure that the style change takes effect.
SetWindowPos(_hWnd, HWND_NOTOPMOST, 0, 0, 0, 0,
SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE |
SWP_FRAMECHANGED | SWP_NOSENDCHANGING | SWP_SHOWWINDOW);
SetWindowPos(_hWnd, HWND_NOTOPMOST, view_rect.left, view_rect.top,
view_rect.right - view_rect.left,
view_rect.bottom - view_rect.top,
SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED |
SWP_NOSENDCHANGING | SWP_SHOWWINDOW);
}
if (properties.has_title()) {