How to add tabs to CView Class?

[_Flaviu]

Could you reproduce more accurate my example in your code ? For instance, in my example CRect has 0 value ... and there is more.

[Sampath579]

I created a sample MFC application with single document template and added the Class which derived from CTabView and created another class which derives from CView. class MyTabClass : public CTabView { //this class created a window with tab control below. But not tab exactly. //Now i added below piece of code to create a tab. int OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CTabView::OnCreate(lpCreateStruct) == -1) return -1; // TODO: Add your specialized creation code here AddView(RUNTIME_CLASS(CView1), _T("View1")); return 0; } } The above code created a single tab on window as shown in below image. [^] But all i need to know is how to create this same tab on Splitter Window which is shown in my first image. A great thanks for you in quick response and support. Please let me know what wrong i did in adding the tab on csplitter window.

[_Flaviu]

My sample code was for splitter case ... do you want to add tab views inside an frame, or inside an splitter ?

[_Flaviu]

And what did exactly didn't work when you had applied my example ?

[Sampath579]

My childframe class contains 5 splitter windows. In one of splitter window i need to create tab. My app code as follows: BOOL CChildFrame::OnCreateClient ( LPCREATESTRUCT lpcs, CCreateContext* pContext ) { UNREFERENCED_PARAMETER (lpcs); CString csMessage = _T(""); CMainFrame* pMainFrame = (CMainFrame*) theApp.m_pMainWnd; // In floating views mode, do setup specific to it: // Create the appropriate view for it. switch (m_iCreationIndex) { case VIEW1: { // Create a four pane splitter window to use solely to pre-create the needed views. BOOL bStatus = GetSplitterObj()->CreateStatic ( this, 2, // rows 3 // columns ); if (FALSE == bStatus) { TRACE0 ("Failed to create splitter window.\n"); return FALSE; } // Create the five views when the first child frame is created. CSize sizeView (0,0); bStatus = GetSplitterObj()->CreateView ( 0, 0, RUNTIME_CLASS (MyScrollClass), sizeView, pContext ); //like wise view 2, view 3 , view 4 and below is view 5 bStatus = GetSplitterObj()->CreateView ( 1, 1, RUNTIME_CLASS (MyTabClass), sizeView, pContext ); } } } // Disconnect views from splitter window. // They will be attached to the appropriate // floating child frame as they are created. pView1->SetDlgCtrlID (-1); pView1->SetParent (this); pView1->ShowWindow (SW_HIDE); pView2->SetDlgCtrlID (-1); pView2->SetParent (this); pView2->ShowWindow (SW_HIDE); pView3->SetDlgCtrlID (-1); pView3->SetParent (this); pView3->ShowWindow (SW_HIDE); pView4->SetDlgCtrlID (-1); pView4->SetParent (this); pView4->ShowWindow (SW_HIDE); pView5->SetDlgCtrlID(-1); pView5->SetParent(this); pView5->ShowWindow(SW_HIDE); // Distroy the obsolete splitter window. GetSplitterObj()->SetDlgCtrlID (-1); GetSplitterObj()->SetParent (NULL); GetSplitterObj()->ShowWindow (SW_HIDE); GetSplitterObj()->DestroyWindow(); delete GetSplitterObj(); GetSplitterObj(NULL); The above piece of code created 5 splitter windows successfully. In Pane(1,1) i need to add tabs. MyTabClass is derived from CTabView. In MyTabClass, i created tab control as follows as you explained above. int MyTabClass::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CTabView::OnCreate(lpCreateStruct) == -1) return -1; if (!m_tab.Create(CMFCTabCtrl::STYLE_3D, CRect(0, 0, 0,

[Sampath579]

On splitter window tab control not added. tab.Create() function returns true but tab control is not visible on splitter window.

[_Flaviu]

Dear member, in order to read easily, please format your code (use "code" button from above edit area). And, yes, m_tab.Create(...) return TRUE, but further more, you do nothing ...

[Sampath579]

Hey sorry for the wrong indentation. Its working absolutely fine with same piece of code. The problem is what i mentioned earlier i.e., the coordinates what i provided does not show the tab control in my split window. I changed the values with hit and trail and some portion of tab control is visible on split window.

if (!m_tab.Create(CMFCTabCtrl::STYLE_3D, CRect(500, -500, 900, 300), this, 1, CMFCTabCtrl::LOCATION_BOTTOM))
{
TRACE(_T("Failed to create output tab window\n"));
return -1;
}

The values 500,-500,900,300 shown the control on my window. I need to write logic to show this control at the bottom of split window. Thanks for your support. Now, i will tweak this and try to add tabs to it. In case of any block i will post it back.

[_Flaviu]

Sure. In my code I give it an empty CRect, and it work fine.

[Sampath579]

Please correct me if i am wrong. While creating a Split window using below statement.

bStatus = GetSplitterObj()->CreateView
			(
				1,
				1,
				RUNTIME\_CLASS(CMyTabClass),
				sizeView,
				pContext
			);

Above call create Split Window. CMyTabClass is derived from CTabView. So, by default the split window should contain tab splitter at the bottom of the window. Am i right? Because this is how it working in my sample application. In sample i created a Class which derives from CTabView and the window is created with tab splitter in the bottom by default. Later i started adding view using addview(). Then why in my application, splitter is not visible in bottom of the splitter window? why should i explicitly create it using Create()..?

[_Flaviu]

The code:

bStatus = GetSplitterObj()->CreateView
(
1,
1,
RUNTIME_CLASS(CMyTabClass),
sizeView,
pContext
);

it is only put CMyTabClass view into your splitter window. The creation of the tabs inside this CMyTabClass should be done in CMyTabClass::OnCreate, where AddView(...) calling is mandatory. So, you should add at least one tab in order to see something inside your splitter window :)

[Sampath579]

Then how come in sample application, below code itself creating a tab bar (horizontal with arrow buttons) in window?

if (CTabView::OnCreate(lpCreateStruct) == -1)
return -1;

The same above piece of code in my application not creating that horizontal tab bar unless i create MFCTabCtl tab; tab.create()....

[Sampath579]

In above provided sample code, i have some doubts. When i created a class CTabbedView which is inherited from CTabView, in OnCreate(), the below call it self created a tab control (horizontal splitter) without any tabs.

if (CTabView::OnCreate(lpCreateStruct) == -1)
return -1;

Then what is the use of below call?

if (!m_tab.Create(CMFCTabCtrl::STYLE_3D, CRect(0, 0, 500, 100), this, 1, CMFCTabCtrl::LOCATION_BOTTOM))
{
TRACE(_T("Failed to create output tab window\n"));
return -1;
}

What is the exact difference between AddTab and AddView.?

[_Flaviu]

AddTab call is creating the tab area: "Call this method to add a pane as a new tab on a tabbed pane" CBaseTabbedPane Class[^] and AddView call is creating the view which are hosted by CTabView: "Call this function to add a view to the tab control that is embedded in a frame" CTabView Class[^]

[Sampath579]

In my case, i need to create tabs dynamically. Lets say. When my application starts user will input a value between 1 to 10. Based on user input i need to create the tabs (no. of tabs). later in each tab in need to display different images. In this case, should i create my class which is inheriting from CTabView or CTabPane?

[_Flaviu]

" should i create my class which is inheriting from CTabView or CTabPane?" Definitely from CTabView. And this CMyTabClass, should include at least one tab, with one view.

[Sampath579]

If i call AddView(), this itself is creating a tab. Is this not enough? No need to call AddTab() right?

[_Flaviu]

Yes, AddView() is creating a tab, so, it is enough.

[Sampath579]

If i call AddView() and run my program, it working absolutely fine with a window and a view(tab). But instead of calling AddView() initially, at runtime i based on user input, i called addview() which leads to a crash. What could be the reason.

class View : public CScrollView
{

}

//below is my main class
class MyTabClass : public CTabView
{
//this function gets called automatically during creation of window.
void OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CTabView::OnCreate(lpCreateStruct) == -1)
return -1;
AddView(RUNTIME_CLASS(View),_T("Sheet1")); //this works fine.
}

//this function i will call based on user input and hence its crashing during addView call.
void RunTimeBasedOnUserInput()
{
	for(int i = 0 ; i < userinput; i++)
	{
		AddView(RUNTIME\_CLASS(View),\_T("sheet %d",i));
	}

}

}

After investigation, what i found is, During creation of window itself, OnInitUpdate function in class View is getting called each time when AddView() is called. But if i create the views dynamically, then AddView() wont call OnInitUpdate of my View class and hence the crash occurs. Exception as follows: --------------------------- Microsoft Visual C++ Runtime Library --------------------------- Debug Assertion Failed! Program: C:\Windows\SYSTEM32\mfc140d.dll File: f:\dd\vctools\vc7libs\ship\atlmfc\src\mfc\afxtabview.cpp Line: 102 For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts. (Press Retry to debug the application) --------------------------- Abort Retry Ignore --------------------------- Can you let me know how to get rid of this problem?

[Sampath579]

If i call AddView() and run my program, its working absolutely fine with a window and a view(tab). But instead of calling AddView() initially, at runtime based on user input, i called addview() which leads to a crash. What could be the reason.

class View : public CScrollView
{

}

//below is my main class
class MyTabClass : public CTabView
{
//this function gets called automatically during creation of window.
void OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CTabView::OnCreate(lpCreateStruct) == -1)
return -1;
AddView(RUNTIME_CLASS(View),_T("Sheet1")); //this works fine.
}

//this function i will call based on user input and hence its crashing during addView call.
void RunTimeBasedOnUserInput()
{
	for(int i = 0 ; i < userinput; i++)
	{
		AddView(RUNTIME\_CLASS(View),\_T("sheet %d",i));
	}

}

}