ctrl_text.hpp
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上传日期:2020-07-06
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文件大小:5k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * ctrl_text.hpp
- *****************************************************************************
- * Copyright (C) 2003 the VideoLAN team
- * $Id: 30695f4e25e281438249028a8f6655718b42db91 $
- *
- * 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_TEXT_HPP
- #define CTRL_TEXT_HPP
- #include "ctrl_generic.hpp"
- #include "../utils/fsm.hpp"
- #include "../utils/observer.hpp"
- #include <string>
- class GenericFont;
- class GenericBitmap;
- class OSTimer;
- class UString;
- class VarText;
- /// Class for control text
- class CtrlText: public CtrlGeneric, public Observer<VarText>
- {
- public:
- enum Align_t
- {
- kLeft,
- kCenter,
- kRight
- };
- enum Scrolling_t
- {
- // The text starts scrolling automatically if it is larger than the
- // width of the control. The user can still stop it or make it
- // scroll manually with the mouse.
- kAutomatic,
- // Only manual scrolling is allowed (with the mouse)
- kManual,
- // No scrolling of the text is allowed
- kNone
- };
- /// Create a text control with the optional given color
- CtrlText( intf_thread_t *pIntf, VarText &rVariable,
- const GenericFont &rFont, const UString &rHelp,
- uint32_t color, VarBool *pVisible, Scrolling_t scrollMode,
- Align_t alignment);
- virtual ~CtrlText();
- /// 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 );
- /// Set the text of the control, with an optional color
- /// This takes effect immediatly
- void setText( const UString &rText, uint32_t color = 0xFFFFFFFF );
- /// Get the type of control (custom RTTI)
- virtual string getType() const { return "text"; }
- private:
- /// Finite state machine of the control
- FSM m_fsm;
- /// Variable associated to the control
- VarText &m_rVariable;
- /// Callback objects
- DEFINE_CALLBACK( CtrlText, ToManual )
- DEFINE_CALLBACK( CtrlText, ManualMoving )
- DEFINE_CALLBACK( CtrlText, ManualStill )
- DEFINE_CALLBACK( CtrlText, Move )
- /// The last received event
- EvtGeneric *m_pEvt;
- /// Font used to render the text
- const GenericFont &m_rFont;
- /// Color of the text
- uint32_t m_color;
- /// Scrolling mode
- Scrolling_t m_scrollMode;
- /// Type of alignment
- Align_t m_alignment;
- /// Image of the text
- GenericBitmap *m_pImg;
- /// Image of the text, repeated twice and with some blank between;
- /// useful to display a 'circular' moving text...
- GenericBitmap *m_pImgDouble;
- /// Current image (should always be equal to m_pImg or m_pImgDouble)
- GenericBitmap *m_pCurrImg;
- /// Position of the left side of the moving text (always <= 0)
- int m_xPos;
- /// Offset between the mouse pointer and the left side of the
- /// moving text
- int m_xOffset;
- /// Timer to move the text
- OSTimer *m_pTimer;
- /// Callback for the timer
- DEFINE_CALLBACK( CtrlText, UpdateText );
- /// Method called when the observed variable is modified
- virtual void onUpdate( Subject<VarText> &rVariable, void* );
- /// Display the text on the control
- void displayText( const UString &rText );
- /// Helper function to set the position in the correct interval
- void adjust( int &position );
- /// Update the behaviour of the text whenever the control size changes
- virtual void onPositionChange();
- /// Update the behaviour of the text whenever the control size changes
- virtual void onResize();
- };
- #endif