Transparant Image Button (BMP, GIF, JPG...)

 

Introduction

*I'm not good at English, but if you can understand my story, isn't that enough? :)

When I made this application, especially as dialog based, a lot of buttons were used. Buttons are very important things in my situation. So I decided to make an Image button source.

As you know, there are many sources for image buttons. I think it's useless work making another image button. But those image buttons have a small problem.

In this image, button's background hides the parent's background. That's not what I want. So I am going to handle this problem.

Using the code

There are two ways using this button. First of all, include the following files to your project:

• KbcBmp.h,
• KbcBmp.cpp,
• KbcButton.h,
• KbcButton.cpp,
• Picture.h,
• Picture.cpp

Then, let's start~!

1. Using DDX_Control
   1. Include "KbcButton.h" in header file.
   2. Declare a CKbcButton variable in header file.
   3. Go to dialog resource and draw a button. Check 'Onwer draw' style.
   4. Use DDX_Control like this in CPP file: DDX_Control(pDX, IDC_PLAYBUTTON, m_btnPlay);
   5. Then set button's image by calling SetButtonImage() function.
      Collapse

      // In your header file
              
              #include "KbcButton.h"
              
              class CTestButtonDlg : public CDialog
              {
              protected:
              CKbcButton  m_btnPlay;
              ...
              ...
              }
              // in you cpp file
              
              void CTestButtonDlg::DoDataExchange(CDataExchange* pDX)
              {
              CDialog::DoDataExchange(pDX);
              //{{AFX_DATA_MAP(CTestButtonDlg)
                   DDX_Control(pDX, IDC_PLAYBUTTON, m_btnPlay);
              //}}AFX_DATA_MAP
              }
              BOOL CTestButtonDlg::OnInitDialog()
              {
              ...
              ...
              // set button image..
                   m_btnPlay.SetButtonImage("play.bmp",RGB(255,255,255));
              m_btnPlay.SetToolTipText("Play~!");
              m_btnPlay.SetCursor(AfxGetApp()->LoadCursor(IDC_CURSOR1));
              ...
              ...
              }

2. Using new operation
   1. Include "KbcButton.h" in header file.
   2. Declare a CKbcButton* variable in header file.
   3. Create CKbcButton instance by using new operator.
   4. Call Create() function.
   5. Then set button's image by calling SetButtonImage() function.
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      // In your header file
              
              #include "KbcButton.h"
              
              class CTestButtonDlg : public CDialog
              {
              protected:
              CKbcButton*  m_pButton;
              ...
              ...
              // in you cpp file
              
              BOOL CTestButtonDlg::OnInitDialog()
              {
              ...
              ...
              // create button and set button image..
                   CRect rtButton;
              CWnd* pWnd = GetDlgItem(IDC_STATIC_SHOW);
              pWnd->GetWindowRect(rtButton);
              ScreenToClient(rtButton);
              m_pButton = new CKbcButton;
              m_pButton->Create("CKbcButton", WS_CHILD|WS_VISIBLE|BS_OWNERDRAW,
              rtButton, this, NEWBUTTON);
              m_pButton->SetButtonImage("show.gif",RGB(0,0,255));
              ...
              ...
              }

That's all. Isn't it simple?

Make sure that you set 'Owner draw style' to a button.

Thanks

Thanks to Dr. Yovav Gad (CPicture's author) and The Code Project. :) I learned a lot of things from this site.

History

• Ver 1.0 (11/01/2004)
  • Used CPicture class supporting JPG, GIF...
  • Fixed cursor problem.

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.