Use the scroll bar of souI when using the real window in souI

stay UI Reasonable use of real windows in general can make full use of existing controls , And reduce the trouble of rewriting , But in DUI Inner fusion is a problem , Controls with scroll bars generally have their own scroll bars , This situation may require HOOK Drop the current control . The other is that the size of your own window implementation is larger than the size of the view, and you need to display the scroll bar , This article discusses the second case . In this case, use SOUI The way I use the self-contained scroll bar is to add another layer on the outer layer. The real window answers like this clip Effect of sub window . Here we only talk about the key parts without providing source code .

One   、 Close window transparency , A real window cannot be displayed as a child window in a transparent window .

Two 、 Add... When the outer window is created WS_CLIPCHILDREN sign .

3、 ... and 、 Put a in the Zhenzi window scollview in .

Four 、 When creating a real child window, you need to create two layers , Outside for clip The function is always the same as the view size . The following is the method I used to create

HWND CVideoHostWnd::Create(HWND hWndParent, int id)
{
	HWND hWnd = SNativeWnd::Create(_T("video_host_wnd"), WS_CHILD | WS_VISIBLE/*| WS_CLIPCHILDREN*/, NULL, 0, 0, 0, 0, hWndParent, NULL);
	m_hRealWnd.Create(_T("video_wnd"), WS_CHILD | WS_VISIBLE, NULL, 0, 0, 0, 0, hWnd, NULL);
	SetRelWndID(id);
	return hWnd;
}

stay IRealWndHandler Interface implemented OnRealWndCreate

CVideoHostWnd* pvideoWnd = new CVideoHostWnd();
			pvideoWnd->Create(pRealWnd->GetContainer()->GetHostHwnd(),pRealWnd->GetID());
			pRealWnd->SetData(pvideoWnd);
			// Returns the window handle after successful creation 
			return pvideoWnd->m_hWnd;

5、 ... and 、 Adjust the size and position of the two windows at the right time

void CRealWndHelper::Init(CVideoHostWnd* pvideoWnd, SScrollView* pScoroll)
	{
		m_pvideoWnd = pvideoWnd;
		m_pScoroll = pScoroll;
		SASSERT(m_pvideoWnd && m_pScoroll);
		m_pScoroll->GetEventSet()->subscribeEvent<CRealWndHelper, EventScrollViewOriginChanged>(&CRealWndHelper::OnScrollViewOriginChanged, this);
		m_pScoroll->GetEventSet()->subscribeEvent<CRealWndHelper, EventScrollViewSizeChanged>(&CRealWndHelper::OnScrollViewSizeChanged, this);
	}
	
	void CRealWndHelper::SetvideoViewSize(CSize szViewSize)
	{
		SASSERT(m_pvideoWnd && m_pScoroll);
		m_pScoroll->SetAttribute(L"viewsize", SStringT().Format(L"%dpx,%dpx", szViewSize.cx, szViewSize.cy), TRUE);
		m_pScoroll->RequestRelayout();
	}
	
	bool CRealWndHelper::OnScrollViewSizeChanged(EventScrollViewSizeChanged* pEv)
	{
		m_pvideoWnd->SetRelWndSize(pEv->szNewViewSize);
		return true;
	}

	bool CRealWndHelper::OnScrollViewOriginChanged(EventScrollViewOriginChanged* pEv)
	{
		m_pvideoWnd->SetRelWndOrg(pEv->ptNewOrigin);
		return true;
	}

The final effect is as follows ：