Click here to Skip to main content
Click here to Skip to main content

Transparent group box

, 1 Feb 2000
Rate this:
Please Sign up or sign in to vote.
A very simple group box replacement to enhance your user interface
  • Download source files - 2 Kb
  • Sample Image - TGroupBox.gif

    <!-- Article Starts -->

    If you make a dialog with a bitmap as background, you'll probably handle WM_CTLCOLOR and CTLCOLOR_STATIC to set a transparent background for text items.

    This works fine except with groupboxes: if the text is transparent the group rectangle goes right through your text, which looks BAD.

    To make it look better, use this class CTGroupBox. It draws every side of the box rectangle using LineTo's and takes care of the text position and extent.

    Usage is simple: just give your group boxes unique IDs (instead of IDC_STATIC) and then subclass them in OnInitDialog:

    // in your .cpp file
    void CMyBitmappedDialog::OnInitDialog()
    {
    	CBitmapDialog::OnInitDialog();  // I'm using Joerg Koenigs CBitmapDialog class
            
    	m_TGrpBox1.SubclassDlgItem(IDC_GRPBOX1, this);
    	m_TGrpBox2.SubclassDlgItem(IDC_GRPBOX2, this);
    	...
    
    	return TRUE;
    }
    // in your .h file
    #include "TGroupBox.h"
    
    class CMyBitmappedDialog : public CBitmapDialog
    {
    private:
    	CTGroupBox m_TGrpBox1;
    	CTGroupBox m_TGrpBox2;
    	...
    }

    Thats all!

    Remark: Group boxes are technically buttons(!) with style BS_GROUPBOX but they don't seem to receive WM_DRAWITEM messages even if BS_OWNERDRAW is set. So I do the drawing in an WM_PAINT handler but thats not too hard here because they can't be "pressed" or get the focus rect.

    Comments, suggestions, bug reports etc. are welcome! Put them here as comment or send them directly to me.

    Enjoy!

    License

    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

    A list of licenses authors might use can be found here

    About the Author

    Jens Schacherl

    United States United States
    No Biography provided

    Comments and Discussions

     
    QuestionDoes this work? PinmemberCharlieG29-Mar-04 8:21 

    General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

    Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

    | Advertise | Privacy | Mobile
    Web02 | 2.8.140709.1 | Last Updated 2 Feb 2000
    Article Copyright 2000 by Jens Schacherl
    Everything else Copyright © CodeProject, 1999-2014
    Terms of Service
    Layout: fixed | fluid