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ResizableFormView

, 27 Oct 2001
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A CFormView derived class to implement resizable form views with MFC

CResizableFormView

This class handles resizable Form views and it's based on my ResizableLib class library (see article).

The user will have the ability to resize the Form, with consequent rearrangement of child windows. If the Form window gets smaller than its minimum size, it becomes scrollable like standard CFormView.

Conversion of a previously existant Form should be very simple, as well as creation of a new resizable dialog.

The Sample Applications

This is a view of the SDI application:

A SDI application with resizable Form View

This is a view of the MDI application:

A MDI application with resizable Form View

You may see how to do this in the next section.

Usage - Step by Step

Add the ResizableLib to your project's workspace, as explained in the relative article.

Create a standard Form view or take one you have already made which you want to be resizable.

Include 'ResizableFormView.h' in the associated header file.

Search and replace all CFormView occurrences with CResizableFormView in both your .cpp and .h files, just as if your dialog class was derived from CResizableFormView instead of CFormView. I think there's no way to let the Class Wizard do this for you. Let me know if I'm wrong, please.

Your header file should appear like this:

#include <span class="code-string">"ResizableFormView.h"</span>

class CMyFormView : public CResizableFormView
{
protected: // create from serialization only
    CMyFormView();
    DECLARE_DYNCREATE(CMyFormView)


// ( other stuff )
// ...
}

In your OnInitialUpdate override, add an anchor for each control you want the size and/or position to be changed when the user resizes the Form.

void CMyFormView::OnInitialUpdate()
{
    // must add controls to the layout
    // before OnInitialUpdate base implementation
    AddAnchor(IDC_LIST1, TOP_LEFT, BOTTOM_RIGHT);
    AddAnchor(IDC_GROUP1, TOP_LEFT, BOTTOM_LEFT);

    // complete initialization
    CResizableFormView::OnInitialUpdate();

    // these two lines are optional
    GetParentFrame()->RecalcLayout();
    ResizeParentToFit();
}

You are ready to rebuild your project and you will have a resizable Form view just as you wanted.

For further details, see the next section.

Class Reference

This class inherits only from CResizableLayout and obviously from CFormView. It just needs basic resizing capabilities.

CResizableFormView::CResizableFormView

CResizableFormView(UINT nIDTemplate)
CResizableFormView(LPCTSTR lpszTemplateName)
These are needed to reproduce the construction scheme of a CFormView derived class. This is the reason why replacing one class with the other will work.

CResizable???::???

Implemented in the various base classes, see ResizableLib article.

Conclusion

Even this class is eventually integrated with ResizableLib. Many thanks to John Simmons for his first attempt to make resizable Form views and for pointing out the scrolling problem. To solve it I had to add more functionalities to CResizableLayout, that could be useful for other purposes.

The CVS tree is now on Source Forge.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Paolo Messina
Software Developer RoboTech srl
Italy Italy
Paolo began programming at the age of 9 with a glorious 8086 and GW-BASIC, then he played a bit with C, ASM and Pascal. He tought himself MFC and Windows programming, to exploit his studies of C++. Always attracted by low-level programming and Assembly, he's beginning to appreciate the joys of templates and STL. At work he changed his mind about Java, discovered Eclipse IDE, and now think it's cool.
 
He lives in Follonica, Italy.
 
He has been abroad in the U.S. to work on his final thesis before graduating. For seven months he was playing with airplanes and automatic control at the Unversity of Illinois at Urbana-Champaign.
 
He graduated in Computer Science Engineering at the University of Pisa, Italy, in December 2003.
 
Currently working for an edutainment robotics company (www.robotechsrl.com).
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Comments and Discussions

 
GeneralMy vote of 5 PinmemberCloudsy17-Jan-14 4:50 
QuestionHow can I use Resizable Lib with CMDIFrameWndEx PinmemberMember 4499645-Nov-13 23:11 
Questionis it some problem with this project? Pinmemberbatsword10-Sep-10 22:43 
Generalgreat, I need it PinmemberLi Shu27-Oct-08 21:14 
GeneralWorks with Ultimate tool and Grid Pinmembermhorowit26-Sep-07 17:49 
QuestionHow to avoid flickering Pinmemberchen_zd7-Jun-07 17:41 
AnswerRe: How to avoid flickering PinmemberPaolo Messina7-Jun-07 22:50 
GeneralRe: How to avoid flickering Pinmemberchen_zd8-Jun-07 6:03 
GeneralGreat.It is just what I want.Thanks Pinmemberbenben30-Jul-03 5:35 
GeneralCResizableForm do not resize itself PinsussAnonymous18-May-03 18:26 
GeneralRe: CResizableForm do not resize itself PinmemberPaolo Messina19-May-03 6:04 
GeneralProblems wiith windows media player activex PinsussPedro Miranda13-May-03 1:28 
GeneralRe: Problems wiith windows media player activex PinmemberPaolo Messina14-May-03 10:46 
GeneralRe: Problems wiith windows media player activex PinsussPedro Miranda15-May-03 5:31 
GeneralRe: Problems wiith activex / Testing new version PinmemberPaolo Messina15-May-03 9:35 
GeneralExcellent PinmemberJohnJ14-Mar-03 0:10 
GeneralActiveX control behaviour during resizing Pinmembershilon31-Jan-03 4:36 
GeneralRe: ActiveX control behaviour during resizing PinmemberPaolo Messina31-Jan-03 12:32 
GeneralRe: ActiveX control behaviour during resizing Pinmembershilon1-Feb-03 1:31 
GeneralRe: ActiveX control behaviour during resizing PinmemberPaolo Messina1-Feb-03 3:57 
GeneralCResizableMinMax and CResizableFormView PinmemberMatt Philmon23-Aug-01 17:03 
GeneralRe: CResizableMinMax and CResizableFormView PinmemberPaolo Messina24-Aug-01 0:38 
Generalprobleme with VScroll Pinmemberbogdan25-Jul-01 23:07 
GeneralRe: probleme with VScroll PinmemberPaolo Messina25-Jul-01 23:15 
Hi Bogdan,
 
This is very strange. My code has almost nothing to do with scrolling...
Could you please send me some sample code or small demo prject to reproduce the problem?
 
Paolo
GeneralRe: probleme with VScroll Pinsusshaibiao1-Aug-03 6:45 

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