ctrl_slider.hpp
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上传日期:2009-03-27
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- /*****************************************************************************
- * ctrl_slider.hpp
- *****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: ctrl_slider.hpp 6961 2004-03-05 17:34:23Z sam $
- *
- * 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_SLIDER_HPP
- #define CTRL_SLIDER_HPP
- #include "ctrl_generic.hpp"
- #include "../utils/bezier.hpp"
- #include "../utils/fsm.hpp"
- #include "../utils/observer.hpp"
- class GenericBitmap;
- class OSGraphics;
- class VarPercent;
- /// Cursor of a slider
- class CtrlSliderCursor: public CtrlGeneric, public Observer<VarPercent>
- {
- public:
- /// Create a cursor with 3 images (which are NOT copied, be careful)
- /// If pVisible is NULL, the control is always visible
- CtrlSliderCursor( intf_thread_t *pIntf, const GenericBitmap &rBmpUp,
- const GenericBitmap &rBmpOver,
- const GenericBitmap &rBmpDown,
- const Bezier &rCurve, VarPercent &rVariable,
- VarBool *pVisible, const UString &rTooltip,
- const UString &rHelp );
- virtual ~CtrlSliderCursor();
- /// Handle an event
- virtual void handleEvent( EvtGeneric &rEvent );
- /// Check whether coordinates are inside the control
- virtual bool mouseOver( int x, int y ) const;
- /// Draw the control on the given graphics
- virtual void draw( OSGraphics &rImage, int xDest, int yDest );
- /// Get the text of the tooltip
- virtual UString getTooltipText() const { return m_tooltip; }
- private:
- /// Finite state machine of the control
- FSM m_fsm;
- /// Variable associated to the cursor
- VarPercent &m_rVariable;
- /// Tooltip text
- const UString m_tooltip;
- /// Initial size of the control
- int m_width, m_height;
- /// Callback objects
- Callback m_cmdOverDown;
- Callback m_cmdDownOver;
- Callback m_cmdOverUp;
- Callback m_cmdUpOver;
- Callback m_cmdMove;
- Callback m_cmdScroll;
- /// Position of the cursor
- int m_xPosition, m_yPosition;
- /// Last saved position of the cursor (stored as a percentage)
- float m_lastPercentage;
- /// Offset between the mouse pointer and the center of the cursor
- int m_xOffset, m_yOffset;
- /// The last received event
- EvtGeneric *m_pEvt;
- /// Images of the cursor in the differents states
- OSGraphics *m_pImgUp, *m_pImgOver, *m_pImgDown;
- /// Current image
- OSGraphics *m_pImg;
- /// Bezier curve of the slider
- const Bezier &m_rCurve;
- /// Callback functions
- static void transOverDown( SkinObject *pCtrl );
- static void transDownOver( SkinObject *pCtrl );
- static void transOverUp( SkinObject *pCtrl );
- static void transUpOver( SkinObject *pCtrl );
- static void transMove( SkinObject *pCtrl );
- static void transScroll( SkinObject *pCtrl );
- /// Method called when the position variable is modified
- virtual void onUpdate( Subject<VarPercent> &rVariable );
- /// Methode to compute the resize factors
- void getResizeFactors( float &rFactorX, float &rFactorY ) const;
- };
- /// Slider background
- class CtrlSliderBg: public CtrlGeneric
- {
- public:
- CtrlSliderBg( intf_thread_t *pIntf, CtrlSliderCursor &rCursor,
- const Bezier &rCurve, VarPercent &rVariable,
- int thickness, VarBool *pVisible, const UString &rHelp );
- virtual ~CtrlSliderBg() {}
- /// Tell whether the mouse is over the control
- virtual bool mouseOver( int x, int y ) const;
- /// Handle an event
- virtual void handleEvent( EvtGeneric &rEvent );
- private:
- /// Cursor of the slider
- CtrlSliderCursor &m_rCursor;
- /// Variable associated to the slider
- VarPercent &m_rVariable;
- /// Thickness of the curve
- int m_thickness;
- /// Bezier curve of the slider
- const Bezier &m_rCurve;
- /// Initial size of the control
- int m_width, m_height;
- /// Methode to compute the resize factors
- void getResizeFactors( float &rFactorX, float &rFactorY ) const;
- };
- #endif