tooltip.cpp
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上传日期:2009-03-27
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- /*****************************************************************************
- * tooltip.cpp
- *****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: tooltip.cpp 6994 2004-03-07 11:47:50Z asmax $
- *
- * 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.
- *****************************************************************************/
- #include "tooltip.hpp"
- #include "generic_bitmap.hpp"
- #include "generic_font.hpp"
- #include "os_factory.hpp"
- #include "os_graphics.hpp"
- #include "os_tooltip.hpp"
- #include "os_timer.hpp"
- #include "var_manager.hpp"
- #include "../utils/ustring.hpp"
- Tooltip::Tooltip( intf_thread_t *pIntf, const GenericFont &rFont, int delay ):
- SkinObject( pIntf ), m_rFont( rFont ), m_delay( delay ), m_pImage( NULL ),
- m_xPos( -1 ), m_yPos( -1 )
- {
- OSFactory *pOsFactory = OSFactory::instance( pIntf );
- m_pTimer = pOsFactory->createOSTimer( Callback( this, &doShow ) );
- m_pOsTooltip = pOsFactory->createOSTooltip();
- // Observe the tooltip text variable
- VarManager::instance( pIntf )->getTooltipText().addObserver( this );
- }
- Tooltip::~Tooltip()
- {
- VarManager::instance( getIntf() )->getTooltipText().delObserver( this );
- SKINS_DELETE( m_pTimer );
- SKINS_DELETE( m_pOsTooltip );
- if( m_pImage )
- {
- delete m_pImage;
- }
- }
- void Tooltip::show()
- {
- // (Re)start the timer
- m_pTimer->start( m_delay, true );
- }
- void Tooltip::hide()
- {
- m_pTimer->stop();
- m_pOsTooltip->hide();
- m_xPos = -1;
- m_yPos = -1;
- }
- void Tooltip::onUpdate( Subject<VarText> &rVariable )
- {
- // Redisplay the tooltip
- displayText( ((VarText&)rVariable).get() );
- }
- void Tooltip::displayText( const UString &rText )
- {
- // Rebuild the image
- makeImage( rText );
- // Redraw the window if it is already visible
- if( m_xPos != -1 )
- {
- m_pOsTooltip->show( m_xPos, m_yPos, *m_pImage );
- }
- }
- void Tooltip::makeImage( const UString &rText )
- {
- // Render the text on a bitmap
- GenericBitmap *pBmpTip = m_rFont.drawString( rText, 0 );
- if( !pBmpTip )
- {
- return;
- }
- int w = pBmpTip->getWidth() + 10;
- int h = m_rFont.getSize() + 8;
- // Create the image of the tooltip
- if( m_pImage )
- {
- delete m_pImage;
- }
- m_pImage = OSFactory::instance( getIntf() )->createOSGraphics( w, h );
- m_pImage->fillRect( 0, 0, w, h, 0xffffd0 );
- m_pImage->drawRect( 0, 0, w, h, 0x000000 );
- m_pImage->drawBitmap( *pBmpTip, 0, 0, 5, 5 );
- delete pBmpTip;
- }
- void Tooltip::doShow( SkinObject *pObj )
- {
- Tooltip *pThis = (Tooltip*)pObj;
- if( pThis->m_pImage )
- {
- if( pThis->m_xPos == -1 )
- {
- // Get the mouse coordinates and the image size
- OSFactory *pOsFactory = OSFactory::instance( pThis->getIntf() );
- int x, y;
- pOsFactory->getMousePos( x, y );
- int scrWidth = pOsFactory->getScreenWidth();
- int scrHeight = pOsFactory->getScreenHeight();
- int w = pThis->m_pImage->getWidth();
- int h = pThis->m_pImage->getHeight();
- // Compute the position of the tooltip
- x -= (w / 2 + 4);
- y += (h + 5);
- if( x + w > scrWidth )
- x -= (x + w - scrWidth);
- else if( x < 0 )
- x = 0;
- if( y + h > scrHeight )
- y -= (2 * h + 20);
- pThis->m_xPos = x;
- pThis->m_yPos = y;
- }
- // Show the tooltip window
- pThis->m_pOsTooltip->show( pThis->m_xPos, pThis->m_yPos,
- *(pThis->m_pImage) );
- }
- }