Re: How to add tabs to CView Class? - C / C++ / MFC Discussion Boards

Re: How to add tabs to CView Class?

Sampath5796-Mar-18 4:09

Sampath579

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()..?

Re: How to add tabs to CView Class?

_Flaviu6-Mar-18 4:30

_Flaviu

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 | :)

Re: How to add tabs to CView Class?

Sampath5796-Mar-18 4:52

Sampath579

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()....

Re: How to add tabs to CView Class?

Sampath57910-Mar-18 22:06

Sampath579

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.

Re: How to add tabs to CView Class?

Sampath57910-Mar-18 22:10

Sampath579

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));
		}

	}
}

Re: How to add tabs to CView Class?

_Flaviu6-Mar-18 0:36

_Flaviu

6-Mar-18 0:36

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

Re: How to add tabs to CView Class?

Sampath5796-Mar-18 0:45

Sampath579

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.

Re: How to add tabs to CView Class?

Sampath5796-Mar-18 20:18

Sampath579

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.?

Re: How to add tabs to CView Class?

_Flaviu6-Mar-18 21:01

_Flaviu

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[^]

Re: How to add tabs to CView Class?

Sampath5796-Mar-18 21:20

Sampath579

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?

Re: How to add tabs to CView Class?

_Flaviu6-Mar-18 21:35

_Flaviu

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.

Re: How to add tabs to CView Class?

Sampath5796-Mar-18 21:51

Sampath579

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?

Re: How to add tabs to CView Class?

_Flaviu6-Mar-18 22:08

_Flaviu

6-Mar-18 22:08

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

Re: How to add tabs to CView Class?

Sampath57910-Mar-18 22:15

Sampath579

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));
		}

	}
}

Re: How to add tabs to CView Class?

_Flaviu12-Mar-18 23:43

_Flaviu

12-Mar-18 23:43

Hi. Have you solved this ?

Serializing CMapStringToPtr

_Flaviu4-Mar-18 22:35

_Flaviu

4-Mar-18 22:35

I am serializing CMapStringToPtr object without any problem, key by key, pointer to pointer.

For this case, the key order it is matter.

So, if I archive this CMapStringToPtr object, and de-archive on the same machine, the key order are fine. But, if I de-archive this object on other machine, the key order are not the same, and this is a PROBLEM. How can avoid this issue ?

Yes, I could serialize another CStringArray with the CMapStringToPtr keys, but I don't know if this a good idea ... can you tell me how to overcome this problem ?

Thank you.

Re: Serializing CMapStringToPtr

CPallini4-Mar-18 23:29

CPallini

4-Mar-18 23:29

Key order is not a property of such a collection (see the documentation[^]) unlike, for instance, the std::map.
So yes, you have to work around that.

MSXML load - not able to read chinese characters in path

Gopi Nath28-Feb-18 22:25

Gopi Nath

28-Feb-18 22:25

Hello Everybody,

I am trying to read XML file using MSXML parser. Till now, all paths are in English characters and inside file also all are in English only.

Now, we are trying to move with Chinese characters also. So, inside file wherever needed, we are able to manage conversion and load the file using MSXML parser.

Now, the problem is, if the path of the xml file consists of Chinese characters, then

IXMLDOMDocumentPtr->load(path)

is not working.

Is there anyway to load the file ?

PS. we can able to write a new parser, but need to change a lot in our existing application.

Thanks in advance.

Regards,
Gopinath.

Re: MSXML load - not able to read chinese characters in path

Richard MacCutchan28-Feb-18 22:52

Richard MacCutchan

28-Feb-18 22:52

Gopi Nath wrote:
is not working

What does that mean?

Re: MSXML load - not able to read chinese characters in path

Gopi Nath28-Feb-18 23:12

Gopi Nath

28-Feb-18 23:12

Hello Richard,

MSXML::IXMLDOMDocumentPtr->load function, when I tried to load a file in which the path or file name contains Chinese characters, its not loading. Means, it fails to load the file into the document pointer and return false.

Regards,
Gopinath.

Re: MSXML load - not able to read chinese characters in path

Richard MacCutchan28-Feb-18 23:15

Richard MacCutchan

28-Feb-18 23:15

Then you need to use your debugger to find out why that load is failing. Are you using proper Unicode file paths? See Naming Files, Paths, and Namespaces (Windows)[^].

Re: MSXML load - not able to read chinese characters in path

Gopi Nath28-Feb-18 23:46

Gopi Nath

28-Feb-18 23:46

Thanks Richard,

I will check and will get back to you on this.

Regards,
Gopinath.

Re: MSXML load - not able to read chinese characters in path

David Crow1-Mar-18 7:26

David Crow

1-Mar-18 7:26

Do you need to canonicalize the path?

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"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

Re: MSXML load - not able to read chinese characters in path

Victor Nijegorodov1-Mar-18 10:24

Victor Nijegorodov

1-Mar-18 10:24

Perhaps, there is some problem with encoding?

Re: MSXML load - not able to read chinese characters in path

Randor 1-Mar-18 14:46

Randor

1-Mar-18 14:46

Gopi Nath wrote:
Now, the problem is, if the path of the xml file consists of Chinese characters, then
IXMLDOMDocumentPtr->load(path)
is not working.

You left out so much relevant information...

1.) Could you give an example path containing Chinese characters that fails to load?
2.) What MSXML DLL version?
3.) What operating system version?

Best Wishes,
-David Delaune

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