Changing Active View

[_Tom_]

Dear All, I have a MDI application and I'm currently trying to programmatically change the active view. So in sort I have a combo box on my toolbar which list the views currently open. When I select a different view in this combobox I want that view to come into focus. Basically it should do exactly the same as selecting the view from the 'Window' main menu option. I have tried sending the WM_MDIACTIVATE message to the main frame but this doesn't seem to work. Any suggestions would be gratefully received. Many thanks Tom

[Viorel]

I would suggest you the MDIActivate member of CMDIFrameWnd class. I hope it works.

[_Tom_]

Hi Thanks for the suggestion of using MDIActivate, unfortunately this doesn't seem to do trick when I call the following: pMainFrm->MDIActivate((CWnd*)pView); Where pView is a pointer to the view I want to activate and bring to the front of all other view windows. I was wondering if I should be casting here and whether I had used the function correctly. Thanks Tom

[Viorel]

I suppose the parameter of MDIActivate should be a frame window (CMDIChildWnd) which contains your view. Try this:

CWnd * p = pView->GetParent();
ASSERT_KINDOF(CMDIChildWnd, p);
pMainFrm->MDIActivate(p);

[Cliff Hatch]

I wrote the following procedure to activate views programatically. It's a bit specialised, but I hope it might give you some useful clues. The bit underneath the comment "//There is already a View displaying this parent..." activates the view pointed to by pView.

CKernelView* CMainFrame::ActivateView(CModel* pParentModel)
{
//Activate new or existing view containing pParentModel

CKernelView \*pView, \*pActiveView;
CWnd\* pBar;
CMDIFrameWnd \*pFrame;
CMDIChildWnd \*pChild;

pBar = GetDlgItem(IDD\_NAVIGATOR\_BAR);

//Get a pointer to the active view (there are three stages to this)
pFrame = (CMDIFrameWnd\*)AfxGetApp()->m\_pMainWnd;		//Get a pointer to the active MDI window
pChild = (CMDIChildWnd \*) pFrame->GetActiveFrame();		//Get the active MDI child window.
pActiveView = (CKernelView\*)pChild->GetActiveView();	//Get the View attached to the active MDI child window

if (pActiveView->m\_pParentModel == pParentModel)
	pView = pActiveView;	//The required parent model is already in the active view
else if (pParentModel->m\_pShadow != NULL)
{
	//There is already a View displaying this parent, activate its frame
	pView = pParentModel->m\_pShadow->m\_pView;
	pFrame = (CMDIFrameWnd\*)pView->GetParentFrame();
	pFrame->ActivateFrame(SW\_RESTORE);
}
else if (pBar->IsDlgButtonChecked(IDC\_TRACK\_NEW))
	pView = pParentModel->OpenView(m\_pDocViewed, pParentModel->m\_PlantFlag);	//Open new window
else
{
	//Reuse current window
	pView = pActiveView;
	pView->ChangeModel(pParentModel);	
}

return pView;

}

Best Regards Cliff -- modified at 17:36 Monday 3rd July, 2006