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

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• Download demo project - 79.1 Kb

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.

      // 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.

      // 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.