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fixed bugs with setting the client size when the difference between the total and client size changes as the result (e.g. because the scrollbars [dis]appear or the menu bar [un]wraps

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12934 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2001-12-08 23:13:27 +00:00
parent 8810d43125
commit d4597e138e
6 changed files with 125 additions and 106 deletions
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89
src/msw/window.cpp
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@@ -1493,40 +1493,65 @@ void wxWindowMSW::DoSetSize(int x, int y, int width, int height, int sizeFlags)
void wxWindowMSW::DoSetClientSize(int width, int height)
{
wxWindow *parent = GetParent();
HWND hWnd = GetHwnd();
HWND hParentWnd = (HWND) 0;
if ( parent )
hParentWnd = (HWND) parent->GetHWND();
RECT rect;
::GetClientRect(hWnd, &rect);
RECT rect2;
GetWindowRect(hWnd, &rect2);
// Find the difference between the entire window (title bar and all)
// and the client area; add this to the new client size to move the
// window
int actual_width = rect2.right - rect2.left - rect.right + width;
int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
// If there's a parent, must subtract the parent's top left corner
// since MoveWindow moves relative to the parent
POINT point;
point.x = rect2.left;
point.y = rect2.top;
if ( parent )
// setting the client size is less obvious than it it could have been
// because in the result of changing the total size the window scrollbar
// may [dis]appear and/or its menubar may [un]wrap and so the client size
// will not be correct as the difference between the total and client size
// changes - so we keep changing it until we get it right
//
// normally this loop shouldn't take more than 2 iterations (usually 1 but
// if scrollbars [dis]appear as the result of the first call, then 2) but
// just to be on the safe side we check for it instead of making it an
// "infinite" loop (i.e. leaving break inside as the only way to get out)
for ( int i = 0; i < 3; i++ )
{
::ScreenToClient(hParentWnd, &point);
RECT rectClient;
::GetClientRect(GetHwnd(), &rectClient);
// if the size is already ok, stop here (rectClient.left = top = 0)
if ( rectClient.right == width && rectClient.bottom == height )
{
break;
}
if ( i == 2 )
{
// how did it happen? maybe OnSize() handler does something really
// strange in this class?
wxFAIL_MSG( _T("logic error in DoSetClientSize") );
break;
}
int widthClient = width,
heightClient = height;
// Find the difference between the entire window (title bar and all)
// and the client area; add this to the new client size to move the
// window
RECT rectWin;
::GetWindowRect(GetHwnd(), &rectWin);
widthClient += rectWin.right - rectWin.left - rectClient.right;
heightClient += rectWin.bottom - rectWin.top - rectClient.bottom;
POINT point;
point.x = rectWin.left;
point.y = rectWin.top;
// MoveWindow positions the child windows relative to the parent, so
// adjust if necessary
if ( !IsTopLevel() )
{
wxWindow *parent = GetParent();
if ( parent )
{
::ScreenToClient(GetHwndOf(parent), &point);
}
}
DoMoveWindow(point.x, point.y, widthClient, heightClient);
}
DoMoveWindow(point.x, point.y, actual_width, actual_height);
wxSizeEvent event(wxSize(width, height), m_windowId);
event.SetEventObject(this);
GetEventHandler()->ProcessEvent(event);
}
// For implementation purposes - sometimes decorations make the client area