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Override wxWindow::MSWGetCreateWindowCoords() in wxTopLevelWindow.

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The old code was messy because it handled both top level and child windows at
wxWindow level when they need quite different treatment. This resulted in
several errors: first, wxWindow versions of WidthDefault and HeightDefault
were used to determine the initial size even of top level windows which was
clearly wrong as it created tiny windows (20*20). Second, CW_USEDEFAULT could
be used for child window for which this shouldn't be done.

Fix this by making MSWGetCreateWindowCoords() virtual and overriding it in
wxTopLevelWindow. This makes the code much simpler and more obviously correct.

Also make MSWGetCreateWindowCoords() void, as nobody was using its return
value anyhow (and the old version also had a bug in it and wrongly returned
true when default size was passed to it).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64101 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2010-04-22 11:21:21 +00:00
parent db890987c6
commit fa5f485828
4 changed files with 90 additions and 74 deletions
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74
src/msw/window.cpp
View File

@@ -3640,33 +3640,22 @@ void wxWindowMSW::MSWDestroyWindow()
{
}
bool wxWindowMSW::MSWGetCreateWindowCoords(const wxPoint& pos,
void wxWindowMSW::MSWGetCreateWindowCoords(const wxPoint& pos,
const wxSize& size,
int& x, int& y,
int& w, int& h) const
{
// yes, those are just some arbitrary hardcoded numbers
static const int DEFAULT_Y = 200;
// CW_USEDEFAULT can't be used for child windows so just position them at
// the origin by default
x = pos.x == wxDefaultCoord ? 0 : pos.x;
y = pos.y == wxDefaultCoord ? 0 : pos.y;
bool nonDefault = false;
AdjustForParentClientOrigin(x, y);
if ( pos.x == wxDefaultCoord )
{
// if x is set to CW_USEDEFAULT, y parameter is ignored anyhow so we
// can just as well set it to CW_USEDEFAULT as well
x =
y = CW_USEDEFAULT;
}
else
{
// OTOH, if x is not set to CW_USEDEFAULT, y shouldn't be set to it
// neither because it is not handled as a special value by Windows then
// and so we have to choose some default value for it
x = pos.x;
y = pos.y == wxDefaultCoord ? DEFAULT_Y : pos.y;
nonDefault = true;
}
// We don't have any clearly good choice for the size by default neither
// but we must use something non-zero.
w = WidthDefault(size.x);
h = HeightDefault(size.y);
/*
NB: there used to be some code here which set the initial size of the
@@ -3684,49 +3673,6 @@ bool wxWindowMSW::MSWGetCreateWindowCoords(const wxPoint& pos,
this and ignore any attempts to change the window size to the size it
already has - so no WM_SIZE would be sent.
*/
// we don't use CW_USEDEFAULT here for several reasons:
//
// 1. it results in huge frames on modern screens (1000*800 is not
// uncommon on my 1280*1024 screen) which is way too big for a half
// empty frame of most of wxWidgets samples for example)
//
// 2. it is buggy for frames with wxFRAME_TOOL_WINDOW style for which
// the default is for whatever reason 8*8 which breaks client <->
// window size calculations (it would be nice if it didn't, but it
// does and the simplest way to fix it seemed to change the broken
// default size anyhow)
//
// 3. there is just no advantage in doing it: with x and y it is
// possible that [future versions of] Windows position the new top
// level window in some smart way which we can't do, but we can
// guess a reasonably good size for a new window just as well
// ourselves
// However, on PocketPC devices, we must use the default
// size if possible.
#ifdef _WIN32_WCE
if (size.x == wxDefaultCoord)
w = CW_USEDEFAULT;
else
w = size.x;
if (size.y == wxDefaultCoord)
h = CW_USEDEFAULT;
else
h = size.y;
#else
if ( size.x == wxDefaultCoord || size.y == wxDefaultCoord)
{
nonDefault = true;
}
w = WidthDefault(size.x);
h = HeightDefault(size.y);
#endif
AdjustForParentClientOrigin(x, y);
return nonDefault;
}
WXHWND wxWindowMSW::MSWGetParent() const