text: /***********************************************************************
  	created:	8/8/2004
  	author:		Steve Streeting
  
  	purpose:	Implementation of TabButton widget base class
  *************************************************************************/
  /***************************************************************************
   *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
   *
   *   Permission is hereby granted, free of charge, to any person obtaining
   *   a copy of this software and associated documentation files (the
   *   "Software"), to deal in the Software without restriction, including
   *   without limitation the rights to use, copy, modify, merge, publish,
   *   distribute, sublicense, and/or sell copies of the Software, and to
   *   permit persons to whom the Software is furnished to do so, subject to
   *   the following conditions:
   *
   *   The above copyright notice and this permission notice shall be
   *   included in all copies or substantial portions of the Software.
   *
   *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   *   OTHER DEALINGS IN THE SOFTWARE.
   ***************************************************************************/
  #include "CEGUI/widgets/TabButton.h"
  
  // Start of CEGUI namespace section
  namespace CEGUI
  {
  const String TabButton::EventNamespace("TabButton");
  const String TabButton::WidgetTypeName("CEGUI/TabButton");
  
  
  /*************************************************************************
  	Event name constants
  *************************************************************************/
  const String TabButton::EventClicked( "Clicked" );
  const String TabButton::EventDragged( "Dragged" );
  const String TabButton::EventScrolled( "Scrolled" );
  
  
  /*************************************************************************
  	Constructor
  *************************************************************************/
  TabButton::TabButton(const String& type, const String& name) :
  	ButtonBase(type, name),
      d_selected(false),
      d_dragging(false)
  {
  }
  
  
  /*************************************************************************
  	Destructor
  *************************************************************************/
  TabButton::~TabButton(void)
  {
  }
  
  
  /*************************************************************************
  Set target window
  *************************************************************************/
  void TabButton::setTargetWindow(Window* wnd)
  {
      d_targetWindow = wnd;
      // Copy initial text
      setText(wnd->getText());
      // Parent control will keep text up to date, since changes affect layout
  }
  
  
  /*************************************************************************
  	handler invoked internally when the button is clicked.
  *************************************************************************/
  void TabButton::onClicked(WindowEventArgs& e)
  {
  	fireEvent(EventClicked, e, EventNamespace);
  }
  
  
  /*************************************************************************
  	Handler for mouse button release events
  *************************************************************************/
  void TabButton::onMouseButtonDown(MouseEventArgs& e)
  {
      if (e.button == MiddleButton)
      {
          captureInput ();
          ++e.handled;
          d_dragging = true;
  
          fireEvent(EventDragged, e, EventNamespace);
      }
  
  	// default handling
  	ButtonBase::onMouseButtonDown(e);
  }
  
  void TabButton::onMouseButtonUp(MouseEventArgs& e)
  {
  	if ((e.button == LeftButton) && isPushed())
  	{
  		Window* sheet = getGUIContext().getRootWindow();
  
  		if (sheet)
  		{
  			// if mouse was released over this widget
              // (use mouse position, as e.position has been unprojected)
  			if (this == sheet->getTargetChildAtPosition(
                                      getGUIContext().getMouseCursor().getPosition()))
  			{
  				// fire event
  				WindowEventArgs args(this);
  				onClicked(args);
  			}
  		}
  
  		++e.handled;
      }
      else if (e.button == MiddleButton)
      {
          d_dragging = false;
          releaseInput ();
          ++e.handled;
      }
  
  	// default handling
  	ButtonBase::onMouseButtonUp(e);
  }
  
  void TabButton::onMouseMove(MouseEventArgs& e)
  {
      if (d_dragging)
      {
          fireEvent(EventDragged, e, EventNamespace);
          ++e.handled;
      }
  
  	// default handling
  	ButtonBase::onMouseMove(e);
  }
  
  void TabButton::onMouseWheel(MouseEventArgs& e)
  {
      fireEvent(EventScrolled, e, EventNamespace);
  
  	// default handling
  	ButtonBase::onMouseMove(e);
  }
  
  } // End of  CEGUI namespace section
  