ctrl_generic.hpp
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上传日期:2009-03-27
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- /*****************************************************************************
- * ctrl_generic.hpp
- *****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: ctrl_generic.hpp 7073 2004-03-14 14:33:12Z asmax $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teuli鑢e <ipkiss@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifndef CTRL_GENERIC_HPP
- #define CTRL_GENERIC_HPP
- #include "../src/skin_common.hpp"
- #include "../utils/pointer.hpp"
- #include "../utils/fsm.hpp"
- #include "../utils/ustring.hpp"
- #include "../utils/observer.hpp"
- class EvtGeneric;
- class OSGraphics;
- class GenericLayout;
- class Position;
- class TopWindow;
- class VarBool;
- /// Base class for controls
- class CtrlGeneric: public SkinObject, public Observer<VarBool>
- {
- public:
- virtual ~CtrlGeneric();
- /// Handle an event on the control
- virtual void handleEvent( EvtGeneric &rEvent ) {}
- /// Check whether coordinates are inside the control
- virtual bool mouseOver( int x, int y ) const { return false; }
- /// Draw the control on the given graphics
- virtual void draw( OSGraphics &rImage, int xDest, int yDest ) {}
- /// Set the position and the associated layout of the control
- virtual void setLayout( GenericLayout *pLayout,
- const Position &rPosition );
- /// Get the position of the control in the layout, if any
- virtual const Position *getPosition() const { return m_pPosition; }
- /// Get the text of the tooltip
- virtual UString getTooltipText() const
- { return UString( getIntf(), "" ); }
- /// Overload this method if you want to do something special when
- /// the layout is resized
- virtual void onResize() {}
- /// Get the help text
- virtual const UString &getHelpText() const { return m_help; }
- /// Return true if the control can gain the focus
- virtual bool isFocusable() const { return false; }
- /// Return true if the control is visible
- virtual bool isVisible() const;
- protected:
- // If pVisible is NULL, the control is always visible
- CtrlGeneric( intf_thread_t *pIntf, const UString &rHelp,
- VarBool *pVisible = NULL );
- /// Tell the layout when the image has changed
- virtual void notifyLayout() const;
- /// Ask the layout to capture the mouse
- virtual void captureMouse() const;
- /// Ask the layout to release the mouse
- virtual void releaseMouse() const;
- /// Notify the window the tooltip has changed
- virtual void notifyTooltipChange() const;
- /// Get the associated window, if any
- virtual TopWindow *getWindow() const;
- /// Overload this method if you want to do something special when
- /// the Position object is set
- virtual void onPositionChange() {}
- /// Overload this method to get notified of bool variable changes
- virtual void onVarBoolUpdate( VarBool &rVar ) {}
- private:
- /// Associated layout
- GenericLayout *m_pLayout;
- /// Position in the layout
- Position *m_pPosition;
- /// Help text
- UString m_help;
- /// Visibilty variable
- VarBool *m_pVisible;
- /// Method called when an observed bool variable is changed
- virtual void onUpdate( Subject<VarBool> &rVariable );
- };
- typedef CountedPtr<CtrlGeneric> CtrlGenericPtr;
- #endif