C / C++ / MFC

6-Mar-18 0:44

Message Closed

modified 7-Mar-18 2:10am.

_Flaviu6-Mar-18 1:16

6-Mar-18 1:16

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 ...

Sampath5796-Mar-18 1:44

6-Mar-18 1:44

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.

_Flaviu6-Mar-18 1:50

6-Mar-18 1:50

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

Sampath5796-Mar-18 4:09

6-Mar-18 4:09

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()..?

_Flaviu6-Mar-18 4:30

6-Mar-18 4:30

The code:

C++

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 Smile | :)

Sampath5796-Mar-18 4:52

6-Mar-18 4:52

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()....

Sampath57910-Mar-18 22:06

10-Mar-18 22:06

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?

modified 13-Mar-18 1:03am.

Sampath57910-Mar-18 22:10

10-Mar-18 22:10

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.

<pre>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));
		}

	}
}

_Flaviu6-Mar-18 0:36

6-Mar-18 0:36

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

Sampath5796-Mar-18 0:45

6-Mar-18 0:45

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

Sampath5796-Mar-18 20:18

6-Mar-18 20:18

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.?

_Flaviu6-Mar-18 21:01

6-Mar-18 21:01

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[^]

Sampath5796-Mar-18 21:20

6-Mar-18 21:20

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?

_Flaviu6-Mar-18 21:35

6-Mar-18 21:35

" 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.

Sampath5796-Mar-18 21:51

6-Mar-18 21:51

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

_Flaviu6-Mar-18 22:08

6-Mar-18 22:08

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

Sampath57910-Mar-18 22:15

10-Mar-18 22:15

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));
		}

	}
}

_Flaviu12-Mar-18 23:43

Serializing CMapStringToPtr

12-Mar-18 23:43

Hi. Have you solved this ?

_Flaviu4-Mar-18 22:35