In a recent project, I wanted to show the document data using different views. I didn't like the default MFC implementation, creating a new frame window for each view.
I headed to Code Project and found several tabbed window articles (Property Sheet View, A Multi Document Tabbed Interface, etc.) but none was exactly what I needed: one frame per document, and one tab per view. With a little help from Google, I found an old article at CodeGuru named "Tabbed Views" by Salvatore Mosaico. I took the original idea, removed the grouping feature, and created this class, adding support for another feature I needed: tool bars and status bars in the child frame.
Using the Code
- Derive a new class from
CTabbedMDIChildWnd. If you do this by hand, remember to define the message map and dynamic creation. You can use the class wizard to do the dirty work for you.
- Include the header files of your views:
#include <span class="code-string">"FirstView.h"</span>
#include <span class="code-string">"SecondView.h"</span>
- To tell the frame window which tabs to use, use the helper class
CTabbedMDIChildWnd::CTabItem. This class is derived form
TCITEM, with the addition of a
CRuntimeClass to create the view. You can use the provided constructor as in the next example.
OnCreateClient. Inside the function, define the tabs, and call the base class:
BOOL CDemoChildWnd::OnCreateClient(LPCREATESTRUCT lpcs,
- Your class in now ready. It is a good time to compile the project!
- The next step is to change the MDI child frame inside the
InitInstance function of the application:
pDocTemplate = new CMultiDocTemplate(IDR_TabbedFrameTYPE,
Inside the Class
The class has a
CTabCtrl member and creates one tab for each view defined by a call to
DefineTab. It handles the
TCN_SELCHANGING notify messages to hide and show the views as the tabs are selected.
It uses a
std::vector to keep track of the defined tabs using the runtime class of the different views. This implementation imposes a limitation, only one instance of a view class is supported. Calling
DefineTab several times using the same runtime class is not a good idea!
If you want to change the appearance of the tab control, you can customize
CTabbedMDIChildWnd::OnCreateClient to change the styles of the tab control, or make additional calls to add images, etc.
- 1.1 Fixed small memory leak (thanks to J.H.Park)
- 12th March, 2008: Updated downloads