ownerdrawbutton.java

来自「CoolFace是基于jxta的P2P系统」· Java 代码 · 共 30 行

package org.eclipse.swt.widgets;

import org.eclipse.swt.internal.win32.*;

public abstract class OwnerDrawButton extends Button
{
	public OwnerDrawButton( Composite parent, int style )
	  {
	    super( parent, style );

	    int osStyle = OS.GetWindowLong( handle, OS.GWL_STYLE );
	    osStyle |= OS.BS_OWNERDRAW;
	    OS.SetWindowLong( handle, OS.GWL_STYLE, osStyle );
	  }


	  LRESULT wmDrawChild( int wParam, int lParam )
	  {
	    super.wmDrawChild( wParam, lParam );
	    DRAWITEMSTRUCT struct = new DRAWITEMSTRUCT();
	    OS.MoveMemory( struct, lParam, DRAWITEMSTRUCT.sizeof );
	    ownerDraw( struct );
	    return null;
	  }


	protected abstract void ownerDraw( DRAWITEMSTRUCT dis );

}