How to add support for switching the view ?

Hello sir !

Thanks a lot sir, that u have attended my problem.
Im implementing an MDI application with multiple views(form views) different different views are associated with a same document.

I wanted to switch to the views through the menu.

pratibha.

Hello sir,

Actually all views are to be maintained by the same document in an MDI application. So child frame should be created with several views and want to swap views.

pratibha.

sir,

Exactly, i want the same thing that, when i click the menu item it will replace the existing view with a new one within same child frame.

pratibha.

Sir,

Thanks a lot sir, i got a solution .Now i'll try it in my code.

pratibha.

U r right. I wouldn't use it as is. I would just borrow the technique and customize to optimize it. Possibly I would do the creation the first time a new view is invoked.

The point to be noted in this whole discussion is the importance of the ID of the view. This is the one which does all the work.

In general, when there is a need to switch views, say there is a splitter with 2 panes and you now want to replace one with a new one, the magic is to set the proper dlg ID for the new. I hope the poster will make note of that.

Sir,

I have seen the attachment swapviews.zip sent by

you.Exactly i want the same thing and also got the

solution, but when i implemented it in my application it

gave me application error that is......

unhadled Exception -Access violation

AFXWIN_INLINE BOOL Cwnd::IsWindowVisible()const
{ASSERT(::IsWindow(m_hWnd));::ShowOwnedPopups(m_hWnd,hShow);}

Pratibha.

Before you find in a debugger what part of code causes that assertion it is impossible to resolve your problem.
Sample works.

See changes in the code that you introduced.

That is exactly what sample program does.
It does not destroy views.
If you want to make them visible simultaneously you can use splitter window.

I really would have to see your whole project to give you any intelligent advice. Would it be possible to post your entire project?

Probably the size of this project include debug/release directory that is not needed.
Also files like .ncb, .opt, .plg are not needed. all of the avove can be deleted and the rest should be compressed (winzip is preferable).

Sir,

Sir, or you can see this updated sample application which had been sent by you.

Pratibha.

Sir,

i was able to catch it out whatever you were told in sample program, i did it in swapviews_updated, which i have sent just in previous reply.

But i was trying to tell you that, i don't want exactly the same thing like sample program does else what i want is ,please again make a look to sample program.

when i click an item from view say "form 1", suppose i minimizes it and now opens a new form say "form 2", now total two forms should be there, "form 1" should be in minimized form and "form 2" should be in maximized.if i want to open so many forms at a time ,application would be able to open them so that i can see whatever process is going on simultaneously

Note:=>
--------------------------
so summary is that,want my application just like visual studio, it can open so many files at a time in childFrame but only one file on active state.
--------------------------

pratibha.

Sir,

Sorry sir, i confused you and also took your precious time.simply i can say that i want my application like "visual studio ", Number of form views should be open at a time just like visual studio can open so many files at a time without cosing others.

sir,i request you that ,if i don't able to make you understand my problem,please don't irritate or let me know that you are not able to understand.......just like that you have prevoiusly described.

Sir ,please try to sort uot my problem.Without solving it , i can't proceed my project.

Thanks for your quick response. I'm glad there are still people willing to help .

Pratibha.

Sir,

referred to sample program->
------------------------
When we select more than one document template to choose
from bring up dialog prompting user then it displays seperate views for each document tempelate.
------------------------

Though that was the thing that i wanted so far.
But i don't want to go through this way, i mean via applications File menu.Instead of this i want to display seperate views, when i click to corresponding menu item. Like form 1, form 2......so on.

In last sample program when we click on corresponding view menu item it overrides the views.i want these views to be there only just like applications file menu does with each template.

pratibha.

In addition to my previous post:
You should use terms that are common, known to everybody and follow meaning of terms: view is a view frame is a frame and you cannot use term swap views instead create new document file.

I have rewritten code in a attached sample. I hope that even it is not what you are looking for you have gotten enough hints an sample code to continue.

Sir,

i found one way to solve my problem.Make look to MDI.zip, it opens new document when menu items are selected. Each document (with its view and child frame) is created using different document template.

shall i implement in this way,or it will creat any problem in future.

following is my program:

I would do it this way:

You are very welcome. i am glad to be of help.

whatever i understood is that, you are creating SDI application
with so many views.And want to put tab controls, each tab contains a different view. Right ?

Just create tab control as a child of the main frame and each consecutive view as child of the tab, adding new item when you create view.

Give each view unique ID that you can easy decode and use the same technique as in sample to swap views.

For example: assign ID from a tab number. When selection change hide view from previous selection (or all for that nmatter); show and resize window that has selected tab ID.

Override OnSize in a tab to resize only view that view in the client area of the tab.

I presume that you are referring to a document instance, not class.

Once view is created, it is added to a document object.
All information needed to do that is to pass pointer to a CCreateContext class (structure) initialized with proper values.

This code will do just that in a frame window:

CRuntimeClass *pClass = RUNTIME_CLASS(CSomeClass);

CWnd *pWnd = (CWnd*)pClass->CreateObject();

CCreateContext cntxt;
cntxt.m_pCurrentDoc = GetActiveDicument(); //ot obtain pointer some other way
cntxt.m_pCurrentFrame = this;
cntxt.m_pNewViewClass = pClass;
ASSERT_KINDOF(CWnd, pWnd);

pWnd->Create(NULL, NULL, AFX_WS_DEFAULT_VIEW,
CRect(0,0,0,0), this, AFX_IDW_PANE_FIRST + 2, &cntxt);

Originally posted by ajay_sonawane7
My docuement is attached to CHtmlView.Can u please tell me that what should I do to solve this problem ? It the other way around. View is attached to a document.

As for the rest you would have to give more details about what you are trying to accomplish. I would suggest creating new thread.

CEdit class has already serialization build in and document created by app wizard has proper call in ID_FILE_SEND_MAIL command handler.

Just a side note: Defaulr implementation assumes (wrongly) that edit view is the only view wired to document and moreover it assumes (wrongly again) that firs view added to a document list is edit view.

ChtmlView does not have native support, therefore you have to implement it.

I wrote this sample for MDI, hence switching views is handled by a parent of all views: child frame.
The same should be done in SDI in main frame window. Just port relevant code to main frame class.

You are very welcome.