void CResizableLayout::EnumAndClipChildWindow(HWND hWnd, CDC* pDC)
{
// obtain window position
CRect rect;
::GetWindowRect(hWnd, &rect);
GetResizableWnd()->ScreenToClient(&rect);
pDC->DPtoLP(&rect);
// use window region if any
CRgn rgn;
rgn.CreateRectRgn(0,0,0,0);
if (COMPLEXREGION == ::GetWindowRgn(hWnd, rgn))
{
rgn.OffsetRgn(rect.TopLeft());
}
else
{
rgn.SetRectRgn(&rect);
}
// go clipping?
if (LikesClipping(hWnd))
pDC->SelectClipRgn(&rgn, RGN_DIFF);
else
pDC->SelectClipRgn(&rgn, RGN_OR);
}
void CResizableLayout::ClipChildWindow(const CResizableLayout::LayoutInfo& layout,
CRgn* pRegion)
{
// obtain window position
CRect rect;
::GetWindowRect(layout.hWnd, &rect);
::MapWindowPoints(NULL, GetResizableWnd()->m_hWnd, (LPPOINT)&rect, 2);
// use window region if any
CRgn rgn;
rgn.CreateRectRgn(0,0,0,0);
switch (::GetWindowRgn(layout.hWnd, rgn))
{
case COMPLEXREGION:
case SIMPLEREGION:
rgn.OffsetRgn(rect.TopLeft());
break;
default:
rgn.SetRectRgn(&rect);
}
// get the clipping property
BOOL bClipping = layout.properties.bAskClipping ?
LikesClipping(layout) : layout.properties.bCachedLikesClipping;
// modify region accordingly
if (bClipping)
pRegion->CombineRgn(pRegion, &rgn, RGN_DIFF);
else
pRegion->CombineRgn(pRegion, &rgn, RGN_OR);
}
/*!
* This function is used to set the initial resize properties of a control
* in the layout, that are stored in the @c properties member of the
* related @c LAYOUTINFO structure.
*
* @param layout Reference to the @c LAYOUTINFO structure to be set
*
* @remarks The various flags are used to specify whether the resize
* properties (clipping, refresh) can change at run-time, and a new
* call to the property querying functions is needed at every
* layout update, or they are static properties, and the cached
* value is used whenever necessary.
* @n The default implementation sends a registered message to the
* control, giving it the opportunity to specify its resize
* properties, which takes precedence if the message is supported.
* It then sets the @a clipping property as static, calling
* @c LikesClipping only once, and the @a refresh property as
* dynamic, causing @c NeedsRefresh to be called every time.
* @n This should be right for most situations, as the need for
* @a refresh usually depends on the size fo a control, while the
* support for @a clipping is usually linked to the specific type
* of control, which is unlikely to change at run-time, but you can
* still override this function if a different beahvior is needed.
*
* @sa LikesClipping NeedsRefresh LAYOUTINFO RESIZEPROPERTIES
*/
void CResizableLayout::InitResizeProperties(LAYOUTINFO &layout) const
{
// check if custom window supports this library
// (properties must be correctly set by the window)
layout.bMsgSupport = Send_QueryProperties(layout.hWnd, &layout.properties);
// default properties
if (!layout.bMsgSupport)
{
// clipping property is assumed as static
layout.properties.bAskClipping = FALSE;
layout.properties.bCachedLikesClipping = LikesClipping(layout);
// refresh property is assumed as dynamic
layout.properties.bAskRefresh = TRUE;
}
}
/*!
* @internal This function adds or removes a control window region
* to or from the specified clipping region, according to its layout
* properties.
*/
void CResizableLayout::ClipChildWindow(const LAYOUTINFO& layout,
CRgn* pRegion) const
{
// obtain window position
CRect rect;
::GetWindowRect(layout.hWnd, &rect);
#if (_WIN32_WINNT >= 0x0501)
//! @todo decide when to clip client only or non-client too (themes?)
//! (leave disabled meanwhile, until I find a good solution)
//! @note wizard97 with watermark bitmap and themes won't look good!
// if (real_WIN32_WINNT >= 0x501)
// ::SendMessage(layout.hWnd, WM_NCCALCSIZE, FALSE, (LPARAM)&rect);
#endif
::MapWindowPoints(NULL, GetResizableWnd()->m_hWnd, (LPPOINT)&rect, 2);
// use window region if any
CRgn rgn;
rgn.CreateRectRgn(0,0,0,0);
switch (::GetWindowRgn(layout.hWnd, rgn))
{
case COMPLEXREGION:
case SIMPLEREGION:
rgn.OffsetRgn(rect.TopLeft());
break;
default:
rgn.SetRectRgn(&rect);
}
// get the clipping property
BOOL bClipping = layout.properties.bAskClipping ?
LikesClipping(layout) : layout.properties.bCachedLikesClipping;
// modify region accordingly
if (bClipping)
pRegion->CombineRgn(pRegion, &rgn, RGN_DIFF);
else
pRegion->CombineRgn(pRegion, &rgn, RGN_OR);
}