modules/gui/skins2/controls/ctrl_radialslider.hpp

   1 /*****************************************************************************
   2  * ctrl_radialslider.hpp
   3  *****************************************************************************
   4  * Copyright (C) 2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet     <asmax@via.ecp.fr>
   8  *          Olivier Teulière <ipkiss@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifndef CTRL_RADIALSLIDER_HPP
  26 #define CTRL_RADIALSLIDER_HPP
  27
  28 #include "ctrl_generic.hpp"
  29 #include "../utils/fsm.hpp"
  30 #include "../utils/observer.hpp"
  31
  32
  33 class GenericBitmap;
  34 class OSGraphics;
  35 class VarPercent;
  36
  37
  38 /// Radial slider
  39 class CtrlRadialSlider: public CtrlGeneric, public Observer<VarPercent>
  40 {
  41 public:
  42     /// Create a radial slider with the given image, which must be
  43     /// composed of numImg subimages of the same size
  44     CtrlRadialSlider( intf_thread_t *pIntf, const GenericBitmap &rBmpSeq,
  45                       int numImg, VarPercent &rVariable, float minAngle,
  46                       float maxAngle, const UString &rHelp,
  47                       VarBool *pVisible );
  48
  49     virtual ~CtrlRadialSlider();
  50
  51     /// Handle an event
  52     virtual void handleEvent( EvtGeneric &rEvent );
  53
  54     /// Check whether coordinates are inside the control
  55     virtual bool mouseOver( int x, int y ) const;
  56
  57     /// Draw the control on the given graphics
  58     virtual void draw( OSGraphics &rImage, int xDest, int yDest, int w, int h );
  59
  60     /// Get the type of control (custom RTTI)
  61     virtual string getType() const { return "radial_slider"; }
  62
  63 private:
  64     /// Finite state machine of the control
  65     FSM m_fsm;
  66     /// Number of sub-images in the slider image
  67     int m_numImg;
  68     /// Variable associated to the slider
  69     VarPercent &m_rVariable;
  70     /// Min and max angles of the button
  71     float m_minAngle, m_maxAngle;
  72     /// Position of the cursor
  73     int m_position;
  74     /// Size of an image
  75     int m_width, m_height;
  76     /// The last received event
  77     EvtGeneric *m_pEvt;
  78     /// Sequence of images
  79     const OSGraphics * const m_pImgSeq;
  80
  81     /// Callback objects
  82     DEFINE_CALLBACK( CtrlRadialSlider, UpDown )
  83     DEFINE_CALLBACK( CtrlRadialSlider, DownUp )
  84     DEFINE_CALLBACK( CtrlRadialSlider, Move )
  85
  86     /// Method called when the observed variable is modified
  87     virtual void onUpdate( Subject<VarPercent> &rVariable, void* );
  88
  89     /// Change the position of the cursor, with the given position of
  90     /// the mouse (relative to the layout). Is blocking is true, the
  91     /// the cursor cannot do more than a half turn
  92     void setCursor( int posX, int posY, bool blocking );
  93 };
  94
  95
  96 #endif