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Tile, center and stretch a bitmap as your MFC dialog background

, 6 Jun 2002 CPOL
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A small CDialog derived class that helps avoid frequent copy/pasting of the same code, when using a bitmap as dialog background

Screenshots

Adding the class to your project

There are three steps you have to follow before you can use this class in your project.

  1. Add BDialog.cpp and BDialog.h to your project
  2. Replace all instances of CDialog with  CBDialog. Do this to both the cpp and h file of your dialog class. For example if your project is called Test, make the changes to TestDlg.cpp and TestDlg.h. You'll have to use Find and Replace.
  3. #include BDialog.h to your dialog header file

So basically we have derived our dialog class from CBDialog instead of CDialog, but since CBDialog is derived from CDialog, you won't have any problems with your existing code.

Using the class

Basically there are just two methods that you need to call.

void CBDialog::SetBitmapStyle(int style)

style - This is used to set the bitmap background style. You can use one of the following three styles.

  • StyleTile - The background image will be tiled
  • StyleStretch - The background image will be stretched
  • StyleCenter - The background image will be centered, if it is smaller than the client area of the dialog

You can call this method either from OnInitDialog() or from any other place in your dialog class. If you call it outside OnInitDialog() you'll also have to call Invalidate() to force a repaint of the dialog client area.

int CBDialog::SetBitmap(UINT nIDResource)

nIDResource - This specifies the resource ID number of the bitmap resource

Return Value

The return value is zero on success and non-zero on failure.

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

Nish Nishant

United States United States
Nish Nishant is a Software Architect/Consultant based out of Columbus, Ohio. He has over 15 years of software industry experience in various roles including Lead Software Architect, Principal Software Engineer, and Product Manager. Nish is a recipient of the annual Microsoft Visual C++ MVP Award since 2002 (13 consecutive awards as of 2014).

Nish is an industry acknowledged expert in the Microsoft technology stack. He authored
C++/CLI in Action for Manning Publications in 2005, and had previously co-authored
Extending MFC Applications with the .NET Framework for Addison Wesley in 2003. In addition, he has over 140 published technology articles on CodeProject.com and another 250+ blog articles on his
WordPress blog. Nish is vastly experienced in team management, mentoring teams, and directing all stages of software development.

Contact Nish : You can reach Nish on his google email id voidnish.

Website and Blog

Comments and Discussions

 
GeneralShow Static text Pinmembernugroho231-Oct-07 6:44 
GeneralRe: Show Static text PinmemberAnu Koshy28-May-10 0:15 
GeneralRe: Show Static text PinmemberRamveer Singh from Gurgaon, Haryana22-May-11 21:41 

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