?? ownerdrawbutton.java
字號:
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 );
}
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