Restrict CDockablePane to CBRS_ALIGN_LEFT or CBRS_ALIGN_RIGHT

[mesajflaviu]

I need to restrict a panel, derived from CDockablePane to be float only on the left or right side. But seem that it can be float anywhere, top and bottom as well. And this CDockablePane is part of a CChildFrame, not a CMainFrame.

Here is the code:

protected:
	CPropertiesWnd1 m_wndPane1;

and

int CChildFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if(CMDIChildWndEx::OnCreate(lpCreateStruct) == -1)
		return -1;

	// TODO: Add your specialized creation code here

	SetIcon(theApp.LoadIcon(IDR_MAINFRAME), FALSE);

	// enable Visual Studio 2005 style docking window behavior
	CDockingManager::SetDockingMode(DT_SMART);
	// enable Visual Studio 2005 style docking window auto-hide behavior
	EnableAutoHidePanes(CBRS_ALIGN_LEFT | CBRS_ALIGN_RIGHT);

	CMDIChildWndEx::m_bEnableFloatingBars = TRUE;

	// Create filter window
	if(! m_wndPane1.Create(_T("Properties 1"), this, CRect(0, 0, 250, 500), TRUE, TRM_PANE1ID, 
		WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | CBRS_RIGHT | CBRS_FLOAT_MULTI, 
		AFX_CBRS_REGULAR_TABS, AFX_CBRS_FLOAT | AFX_CBRS_RESIZE | AFX_CBRS_AUTOHIDE))
	{
		TRACE(_T("Failed to create Filter window\n"));
		return FALSE; // failed to create
	}

	SetDockingWindowIcons(theApp.m_bHiColorIcons);

	AddPane(&m_wndPane1);
	m_wndPane1.EnableDocking(CBRS_ALIGN_LEFT | CBRS_ALIGN_RIGHT);
	DockPane(&m_wndPane1);

	return 0;
}

But when I try to drag the pane, I can drag it anywhere, left, right, up, down: https://postimg.cc/w7tDRsVL
which is not normal. I should can drag the panel only in left or right side.

I attached here a sample project: TestPane.zip

[VictorN]

Not sure it will work, however you could try to handle the WM_WINDOWPOSCHANGING message and depending on the current position allow or not the position changing.

[mesajflaviu]

Not sure it will work, however you could try to handle the WM_WINDOWPOSCHANGING message and depending on the current position allow or not the position changing.

I see, but then what is the point with those settings ? EnableDocking(CBRS_ALIGN_LEFT | CBRS_ALIGN_RIGHT)

[VictorN]

IMHO you mix "docking" and "floating". Don't you?

[mesajflaviu]

As long while I am in dragging state (floating) and I see the arrows for top and bottom direction, I can (and I succeed) to dock the panel in top or bottom position.

[mesajflaviu]

For those who have the same problem, I overridden DockPane method in order to solve my issue. Thank you for your support and your time.

[VictorN]

Thank you for sharing the solution!