ctrl_text.cpp
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:12k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * ctrl_text.cpp
- *****************************************************************************
- * Copyright (C) 2003 the VideoLAN team
- * $Id: e32da13683a8a0cfff3190cf1cd0a5f9ab1a5952 $
- *
- * 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.
- *****************************************************************************/
- #include "ctrl_text.hpp"
- #include "../events/evt_generic.hpp"
- #include "../events/evt_mouse.hpp"
- #include "../src/generic_bitmap.hpp"
- #include "../src/generic_font.hpp"
- #include "../src/os_factory.hpp"
- #include "../src/os_graphics.hpp"
- #include "../src/os_timer.hpp"
- #include "../utils/position.hpp"
- #include "../utils/ustring.hpp"
- #include "../utils/var_text.hpp"
- #define MOVING_TEXT_STEP 1
- #define MOVING_TEXT_DELAY 30
- #define SEPARATOR_STRING " "
- CtrlText::CtrlText( intf_thread_t *pIntf, VarText &rVariable,
- const GenericFont &rFont, const UString &rHelp,
- uint32_t color, VarBool *pVisible, Scrolling_t scrollMode,
- Align_t alignment ):
- CtrlGeneric( pIntf, rHelp, pVisible ), m_fsm( pIntf ),
- m_rVariable( rVariable ), m_cmdToManual( this ),
- m_cmdManualMoving( this ), m_cmdManualStill( this ),
- m_cmdMove( this ), m_pEvt( NULL ), m_rFont( rFont ),
- m_color( color ), m_scrollMode( scrollMode ), m_alignment( alignment ),
- m_pImg( NULL ), m_pImgDouble( NULL ),
- m_pCurrImg( NULL ), m_xPos( 0 ), m_xOffset( 0 ),
- m_cmdUpdateText( this )
- {
- m_pTimer = OSFactory::instance( pIntf )->createOSTimer( m_cmdUpdateText );
- // States
- m_fsm.addState( "still" );
- m_fsm.addState( "moving" );
- m_fsm.addState( "manual1" );
- m_fsm.addState( "manual2" );
- m_fsm.addState( "outStill" );
- m_fsm.addState( "outMoving" );
- // Transitions
- m_fsm.addTransition( "still", "leave", "outStill" );
- m_fsm.addTransition( "outStill", "enter", "still" );
- if( m_scrollMode == kManual )
- {
- m_fsm.addTransition( "still", "mouse:left:down", "manual1",
- &m_cmdToManual );
- m_fsm.addTransition( "manual1", "mouse:left:up", "still",
- &m_cmdManualStill );
- m_fsm.addTransition( "manual1", "motion", "manual1", &m_cmdMove );
- }
- else if( m_scrollMode == kAutomatic )
- {
- m_fsm.addTransition( "still", "mouse:left:down", "manual1",
- &m_cmdToManual );
- m_fsm.addTransition( "manual1", "mouse:left:up", "moving",
- &m_cmdManualMoving );
- m_fsm.addTransition( "moving", "mouse:left:down", "manual2",
- &m_cmdToManual );
- m_fsm.addTransition( "manual2", "mouse:left:up", "still",
- &m_cmdManualStill );
- m_fsm.addTransition( "manual1", "motion", "manual1", &m_cmdMove );
- m_fsm.addTransition( "manual2", "motion", "manual2", &m_cmdMove );
- m_fsm.addTransition( "moving", "leave", "outMoving" );
- m_fsm.addTransition( "outMoving", "enter", "moving" );
- }
- // Initial state
- m_fsm.setState( "outStill" );
- // Observe the variable
- m_rVariable.addObserver( this );
- // Set the text
- displayText( m_rVariable.get() );
- }
- CtrlText::~CtrlText()
- {
- m_rVariable.delObserver( this );
- delete m_pTimer;
- delete m_pImg;
- delete m_pImgDouble;
- }
- void CtrlText::handleEvent( EvtGeneric &rEvent )
- {
- // Save the event to use it in callbacks
- m_pEvt = &rEvent;
- m_fsm.handleTransition( rEvent.getAsString() );
- }
- bool CtrlText::mouseOver( int x, int y ) const
- {
- if( m_pCurrImg )
- {
- // We have 3 different ways of deciding when to return true here:
- // 1) the mouse is exactly over the text (so if you click between two
- // letters, the text control doesn't catch the event)
- // 2) the mouse is over the rectangle of the control
- // 3) the mouse is over the rectangle of the visible text
- // I don't know which one is the best...
- #if 0
- return( x >= 0 && x < getPosition()->getWidth()
- && m_pCurrImg->hit( x - m_xPos, y ) );
- #endif
- #if 1
- return( x >= 0 && x < getPosition()->getWidth()
- && y >= 0 && y < getPosition()->getHeight() );
- #endif
- #if 0
- return( x >= 0 && x < getPosition()->getWidth()
- && y >= 0 && y < getPosition()->getHeight()
- && x < m_pCurrImg->getWidth() && x < m_pCurrImg->getHeight() );
- #endif
- }
- else
- {
- return false;
- }
- }
- void CtrlText::draw( OSGraphics &rImage, int xDest, int yDest )
- {
- if( m_pCurrImg )
- {
- // Compute the dimensions to draw
- int width = min( m_pCurrImg->getWidth() + m_xPos,
- getPosition()->getWidth() );
- int height = min( m_pCurrImg->getHeight(), getPosition()->getHeight() );
- // Draw the current image
- if( width > 0 && height > 0 )
- {
- int offset = 0;
- if( m_alignment == kLeft )
- {
- // We align to the left
- offset = 0;
- }
- else if( m_alignment == kRight &&
- width < getPosition()->getWidth() )
- {
- // The text is shorter than the width of the control, so we
- // can align it to the right
- offset = getPosition()->getWidth() - width;
- }
- else if( m_alignment == kCenter &&
- width < getPosition()->getWidth() )
- {
- // The text is shorter than the width of the control, so we
- // can center it
- offset = (getPosition()->getWidth() - width) / 2;
- }
- rImage.drawBitmap( *m_pCurrImg, -m_xPos, 0, xDest + offset,
- yDest, width, height, true );
- }
- }
- }
- void CtrlText::setText( const UString &rText, uint32_t color )
- {
- // Change the color
- if( color != 0xFFFFFFFF )
- {
- m_color = color;
- }
- // Change the text
- m_rVariable.set( rText );
- }
- void CtrlText::onUpdate( Subject<VarText> &rVariable, void* arg )
- {
- if( isVisible() )
- {
- displayText( m_rVariable.get() );
- }
- }
- void CtrlText::displayText( const UString &rText )
- {
- // Create the images ('normal' and 'double') from the text
- // 'Normal' image
- delete m_pImg;
- m_pImg = m_rFont.drawString( rText, m_color );
- if( !m_pImg )
- {
- return;
- }
- // 'Double' image
- const UString doubleStringWithSep = rText + SEPARATOR_STRING + rText;
- delete m_pImgDouble;
- m_pImgDouble = m_rFont.drawString( doubleStringWithSep, m_color );
- // Update the current image used, as if the control size had changed
- onPositionChange();
- if( m_alignment == kRight && getPosition() &&
- getPosition()->getWidth() < m_pImg->getWidth() )
- {
- m_xPos = getPosition()->getWidth() - m_pImg->getWidth();
- }
- else if( m_alignment == kCenter && getPosition() &&
- getPosition()->getWidth() < m_pImg->getWidth() )
- {
- m_xPos = (getPosition()->getWidth() - m_pImg->getWidth()) / 2;
- }
- else
- {
- m_xPos = 0;
- }
- if( getPosition() )
- {
- // If the control was in the moving state, check if the scrolling is
- // still necessary
- const string &rState = m_fsm.getState();
- if( rState == "moving" || rState == "outMoving" )
- {
- if( m_pImg && m_pImg->getWidth() >= getPosition()->getWidth() )
- {
- m_pCurrImg = m_pImgDouble;
- m_pTimer->start( MOVING_TEXT_DELAY, false );
- }
- else
- {
- m_pTimer->stop();
- }
- }
- notifyLayout( getPosition()->getWidth(), getPosition()->getHeight() );
- }
- }
- void CtrlText::onPositionChange()
- {
- if( m_pImg && getPosition() )
- {
- if( m_pImg->getWidth() < getPosition()->getWidth() )
- {
- m_pCurrImg = m_pImg;
- // When the control becomes wide enough for the text to display,
- // make sure to stop any scrolling effect
- m_pTimer->stop();
- m_xPos = 0;
- }
- else
- {
- m_pCurrImg = m_pImgDouble;
- }
- }
- else
- {
- // m_pImg is a better default value than m_pImgDouble, but anyway we
- // don't care because the control is never drawn without position :)
- m_pCurrImg = m_pImg;
- }
- }
- void CtrlText::onResize()
- {
- onPositionChange();
- }
- void CtrlText::CmdToManual::execute()
- {
- EvtMouse *pEvtMouse = (EvtMouse*)m_pParent->m_pEvt;
- // Compute the offset
- m_pParent->m_xOffset = pEvtMouse->getXPos() - m_pParent->m_xPos;
- m_pParent->m_pTimer->stop();
- m_pParent->captureMouse();
- }
- void CtrlText::CmdManualMoving::execute()
- {
- m_pParent->releaseMouse();
- // Start the automatic movement, but only if the text is wider than the
- // control and if the control can scroll (either in manual or automatic
- // mode)
- if( m_pParent->m_pImg &&
- m_pParent->m_pImg->getWidth() >= m_pParent->getPosition()->getWidth() )
- {
- // The current image may have been set incorrectly in displayText(), so
- // set the correct value
- m_pParent->m_pCurrImg = m_pParent->m_pImgDouble;
- m_pParent->m_pTimer->start( MOVING_TEXT_DELAY, false );
- }
- }
- void CtrlText::CmdManualStill::execute()
- {
- m_pParent->releaseMouse();
- }
- void CtrlText::CmdMove::execute()
- {
- EvtMouse *pEvtMouse = (EvtMouse*)m_pParent->m_pEvt;
- // Do nothing if the text fits in the control
- if( m_pParent->m_pImg &&
- m_pParent->m_pImg->getWidth() >= m_pParent->getPosition()->getWidth() )
- {
- // The current image may have been set incorrectly in displayText(), so
- // we set the correct value
- m_pParent->m_pCurrImg = m_pParent->m_pImgDouble;
- // Compute the new position of the left side, and make sure it is
- // in the correct range
- m_pParent->m_xPos = (pEvtMouse->getXPos() - m_pParent->m_xOffset);
- m_pParent->adjust( m_pParent->m_xPos );
- m_pParent->notifyLayout( m_pParent->getPosition()->getWidth(),
- m_pParent->getPosition()->getHeight() );
- }
- }
- void CtrlText::CmdUpdateText::execute()
- {
- m_pParent->m_xPos -= MOVING_TEXT_STEP;
- m_pParent->adjust( m_pParent->m_xPos );
- m_pParent->notifyLayout( m_pParent->getPosition()->getWidth(),
- m_pParent->getPosition()->getHeight() );
- }
- void CtrlText::adjust( int &position )
- {
- // {m_pImgDouble->getWidth() - m_pImg->getWidth()} is the period of the
- // bitmap; remember that the string used to generate m_pImgDouble is of the
- // form: "foo foo", the number of spaces being a parameter
- if( !m_pImg )
- {
- return;
- }
- position %= m_pImgDouble->getWidth() - m_pImg->getWidth();
- if( position > 0 )
- {
- position -= m_pImgDouble->getWidth() - m_pImg->getWidth();
- }
- }