ctrl_radialslider.hpp
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上传日期:2020-07-06
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文件大小:3k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * ctrl_radialslider.hpp
- *****************************************************************************
- * Copyright (C) 2003 the VideoLAN team
- * $Id: 0c61445a96024afadb0621288f33f10e8bba4709 $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teulière <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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifndef CTRL_RADIALSLIDER_HPP
- #define CTRL_RADIALSLIDER_HPP
- #include "ctrl_generic.hpp"
- #include "../utils/fsm.hpp"
- #include "../utils/observer.hpp"
- class GenericBitmap;
- class OSGraphics;
- class VarPercent;
- /// Radial slider
- class CtrlRadialSlider: public CtrlGeneric, public Observer<VarPercent>
- {
- public:
- /// Create a radial slider with the given image, which must be
- /// composed of numImg subimages of the same size
- CtrlRadialSlider( intf_thread_t *pIntf, const GenericBitmap &rBmpSeq,
- int numImg, VarPercent &rVariable, float minAngle,
- float maxAngle, const UString &rHelp,
- VarBool *pVisible );
- virtual ~CtrlRadialSlider();
- /// 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 type of control (custom RTTI)
- virtual string getType() const { return "radial_slider"; }
- private:
- /// Finite state machine of the control
- FSM m_fsm;
- /// Number of sub-images in the slider image
- int m_numImg;
- /// Variable associated to the slider
- VarPercent &m_rVariable;
- /// Min and max angles of the button
- float m_minAngle, m_maxAngle;
- /// Position of the cursor
- int m_position;
- /// Size of an image
- int m_width, m_height;
- /// The last received event
- EvtGeneric *m_pEvt;
- /// Sequence of images
- OSGraphics *m_pImgSeq;
- /// Last saved position
- int m_lastPos;
- /// Callback objects
- DEFINE_CALLBACK( CtrlRadialSlider, UpDown )
- DEFINE_CALLBACK( CtrlRadialSlider, DownUp )
- DEFINE_CALLBACK( CtrlRadialSlider, Move )
- /// Method called when the observed variable is modified
- virtual void onUpdate( Subject<VarPercent> &rVariable, void* );
- /// Change the position of the cursor, with the given position of
- /// the mouse (relative to the layout). Is blocking is true, the
- /// the cursor cannot do more than a half turn
- void setCursor( int posX, int posY, bool blocking );
- };
- #endif