ContainerWindow *
Window::GetRootOwner()
{
assert(IsDefined());
#ifndef USE_WINUSER
if (parent == nullptr)
/* no parent? We must be a ContainerWindow instance */
return (ContainerWindow *)this;
ContainerWindow *root = parent;
while (root->parent != nullptr)
root = root->parent;
return root;
#else /* USE_WINUSER */
HWND hRoot = ::GetAncestor(hWnd, GA_ROOTOWNER);
if (hRoot == nullptr)
return nullptr;
/* can't use the "checked" method get() because hRoot may be a
dialog, and uses Dialog::DlgProc() */
return (ContainerWindow *)GetUnchecked(hRoot);
#endif /* USE_WINUSER */
}
LRESULT CALLBACK
Window::WndProc(HWND _hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
enum {
#ifndef _WIN32_WCE
WM_VERY_FIRST = WM_NCCREATE,
#else
WM_VERY_FIRST = WM_CREATE,
#endif
};
AssertNoneLocked();
if (message == WM_GETMINMAXINFO)
/* WM_GETMINMAXINFO is called before WM_CREATE, and we havn't set
a Window pointer yet - let DefWindowProc() handle it */
return ::DefWindowProc(_hWnd, message, wParam, lParam);
Window *window;
if (message == WM_VERY_FIRST) {
LPCREATESTRUCT cs = (LPCREATESTRUCT)lParam;
window = (Window *)cs->lpCreateParams;
window->Created(_hWnd);
window->SetUserData(window);
} else {
window = GetUnchecked(_hWnd);
}
LRESULT result = window->OnMessage(_hWnd, message, wParam, lParam);
AssertNoneLocked();
return result;
}
ContainerWindow *
Window::GetRootOwner()
{
#ifndef USE_GDI
if (parent == NULL)
/* no parent? We must be a ContainerWindow instance */
return (ContainerWindow *)this;
ContainerWindow *root = parent;
while (root->parent != NULL)
root = root->parent;
return root;
#else /* USE_GDI */
#ifndef _WIN32_WCE
HWND hRoot = ::GetAncestor(hWnd, GA_ROOTOWNER);
if (hRoot == NULL)
return NULL;
#else
HWND hRoot = hWnd;
while (true) {
HWND hParent = ::GetParent(hRoot);
if (hParent == NULL)
break;
hRoot = hParent;
}
#endif
/* can't use the "checked" method get() because hRoot may be a
dialog, and uses Dialog::DlgProc() */
return (ContainerWindow *)GetUnchecked(hRoot);
#endif /* USE_GDI */
}
/**
* Converts a #HWND into a #Window pointer. Returns nullptr if the
* HWND is not a Window peer. This only works for windows which
* use our WndProc.
*/
gcc_const
static Window *GetChecked(HWND hWnd) {
WNDPROC wndproc = (WNDPROC)::GetWindowLongPtr(hWnd, GWLP_WNDPROC);
return wndproc == WndProc
? GetUnchecked(hWnd)
: nullptr;
}
/**
* Converts a #HWND into a #Window pointer. Returns NULL if the
* HWND is not a Window peer. This only works for windows which
* have called InstallWndProc().
*/
gcc_const
static Window *GetChecked(HWND hWnd) {
WNDPROC wndproc = (WNDPROC)::GetWindowLongPtr(hWnd, GWLP_WNDPROC);
return wndproc == WndProc
#ifdef _WIN32_WCE
/* Windows CE seems to put WNDPROC pointers into some other
segment (0x22000000 added); this is a dirty workaround which
will be implemented properly once we understand what this
really means */
|| ((DWORD)wndproc & 0xffffff) == (DWORD)WndProc
#endif
? GetUnchecked(hWnd)
: NULL;
}
