window_manager.cpp

VLC Player Source Code

/*****************************************************************************
 * window_manager.cpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id$
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *          Olivier Teulière <[e-mail]>
 *
 * 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 "window_manager.hpp"
#include "generic_layout.hpp"
#include "generic_window.hpp"
#include "os_factory.hpp"
#include "anchor.hpp"
#include "tooltip.hpp"
#include "var_manager.hpp"


WindowManager::WindowManager( intf_thread_t *pIntf ):
    SkinObject( pIntf ), m_magnet( 0 ), m_direction( kNone ),
    m_maximizeRect(0, 0, 50, 50),
    m_pTooltip( NULL ), m_pPopup( NULL )
{
    // Create and register a variable for the "on top" status
    VarManager *pVarManager = VarManager::instance( getIntf() );
    m_cVarOnTop = VariablePtr( new VarBoolImpl( getIntf() ) );
    pVarManager->registerVar( m_cVarOnTop, "vlc.isOnTop" );
}


WindowManager::~WindowManager()
{
    delete m_pTooltip;
}


void WindowManager::registerWindow( TopWindow &rWindow )
{
    // Add the window to the set
    m_allWindows.insert( &rWindow );
}


void WindowManager::unregisterWindow( TopWindow &rWindow )
{
    // Erase every possible reference to the window
    m_allWindows.erase( &rWindow );
    m_movingWindows.erase( &rWindow );
    m_dependencies.erase( &rWindow );
}


void WindowManager::startMove( TopWindow &rWindow )
{
    // Rebuild the set of moving windows
    m_movingWindows.clear();
    buildDependSet( m_movingWindows, &rWindow );

#ifdef WIN32
    if( config_GetInt( getIntf(), "skins2-transparency" ) )
    {
        // Change the opacity of the moving windows
        WinSet_t::const_iterator it;
        for( it = m_movingWindows.begin(); it != m_movingWindows.end(); it++ )
        {
            (*it)->setOpacity( m_moveAlpha );
        }

        // FIXME: We need to refresh the windows, because if 2 windows overlap
        // and one of them becomes transparent, the other one is not refreshed
        // automatically. I don't know why... -- Ipkiss
        for( it = m_allWindows.begin(); it != m_allWindows.end(); it++ )
        {
            (*it)->refresh( 0, 0, (*it)->getWidth(), (*it)->getHeight() );
        }
    }
#endif
}


void WindowManager::stopMove()
{
    WinSet_t::const_iterator itWin1, itWin2;
    AncList_t::const_iterator itAnc1, itAnc2;

#ifdef WIN32
    if( config_GetInt( getIntf(), "skins2-transparency" ) )
    {
        // Restore the opacity of the moving windows
        WinSet_t::const_iterator it;
        for( it = m_movingWindows.begin(); it != m_movingWindows.end(); it++ )
        {
            (*it)->setOpacity( m_alpha );
        }
    }
#endif

    // Delete the dependencies
    m_dependencies.clear();

    // Now we rebuild the dependencies.
    // Iterate through all the windows
    for( itWin1 = m_allWindows.begin(); itWin1 != m_allWindows.end(); itWin1++ )
    {
        // Get the anchors of the layout associated to the window
        const AncList_t &ancList1 =
            (*itWin1)->getActiveLayout().getAnchorList();

        // Iterate through all the windows, starting with (*itWin1)
        for( itWin2 = itWin1; itWin2 != m_allWindows.end(); itWin2++ )
        {
            // A window can't anchor itself...
            if( (*itWin2) == (*itWin1) )
                continue;

            // Now, check for anchoring between the 2 windows
            const AncList_t &ancList2 =
                (*itWin2)->getActiveLayout().getAnchorList();
            for( itAnc1 = ancList1.begin(); itAnc1 != ancList1.end(); itAnc1++ )
            {
                for( itAnc2 = ancList2.begin();
                     itAnc2 != ancList2.end(); itAnc2++ )
                {
                    if( (*itAnc1)->isHanging( **itAnc2 ) )
                    {
                        // (*itWin1) anchors (*itWin2)
                        m_dependencies[*itWin1].insert( *itWin2 );
                    }
                    else if( (*itAnc2)->isHanging( **itAnc1 ) )
                    {
                        // (*itWin2) anchors (*itWin1)
                        m_dependencies[*itWin2].insert( *itWin1 );
                    }
                }
            }
        }
    }
}


void WindowManager::move( TopWindow &rWindow, int left, int top ) const
{
    // Compute the real move offset
    int xOffset = left - rWindow.getLeft();
    int yOffset = top - rWindow.getTop();

    // Check anchoring; this can change the values of xOffset and yOffset
    checkAnchors( &rWindow, xOffset, yOffset );

    // Move all the windows
    WinSet_t::const_iterator it;
    for( it = m_movingWindows.begin(); it != m_movingWindows.end(); it++ )
    {
        (*it)->move( (*it)->getLeft() + xOffset, (*it)->getTop() + yOffset );
    }
}


void WindowManager::startResize( GenericLayout &rLayout, Direction_t direction )
{
    m_direction = direction;

    // Rebuild the set of moving windows.
    // From the resized window, we only take into account the anchors which
    // are mobile with the current type of resizing, and that are hanging a
    // window. The hanged windows will come will all their dependencies.

    m_resizeMovingE.clear();
    m_resizeMovingS.clear();
    m_resizeMovingSE.clear();

    WinSet_t::const_iterator itWin;
    AncList_t::const_iterator itAnc1, itAnc2;
    // Get the anchors of the layout
    const AncList_t &ancList1 = rLayout.getAnchorList();

    // Iterate through all the hanged windows
    for( itWin = m_dependencies[rLayout.getWindow()].begin();
         itWin != m_dependencies[rLayout.getWindow()].end(); itWin++ )
    {
        // Now, check for anchoring between the 2 windows
        const AncList_t &ancList2 =
            (*itWin)->getActiveLayout().getAnchorList();
        for( itAnc1 = ancList1.begin(); itAnc1 != ancList1.end(); itAnc1++ )
        {
            for( itAnc2 = ancList2.begin();
                 itAnc2 != ancList2.end(); itAnc2++ )
            {
                if( (*itAnc1)->isHanging( **itAnc2 ) )
                {
                    // Add the dependencies of the hanged window to one of the
                    // lists of moving windows
                    Position::Ref_t aRefPos =
                        (*itAnc1)->getPosition().getRefLeftTop();
                    if( aRefPos == Position::kRightTop )
                        buildDependSet( m_resizeMovingE, *itWin );
                    else if( aRefPos == Position::kLeftBottom )
                        buildDependSet( m_resizeMovingS, *itWin );
                    else if( aRefPos == Position::kRightBottom )
                        buildDependSet( m_resizeMovingSE, *itWin );
                    break;
                }
            }
        }
    }

    // The checkAnchors() method will need to have m_movingWindows properly set
    // so let's insert in it the contents of the other sets
    m_movingWindows.clear();
    m_movingWindows.insert( rLayout.getWindow() );
    m_movingWindows.insert( m_resizeMovingE.begin(), m_resizeMovingE.end() );
    m_movingWindows.insert( m_resizeMovingS.begin(), m_resizeMovingS.end() );
    m_movingWindows.insert( m_resizeMovingSE.begin(), m_resizeMovingSE.end() );
}


void WindowManager::stopResize()
{
    // Nothing different from stopMove(), luckily
    stopMove();
}


void WindowManager::resize( GenericLayout &rLayout,
                            int width, int height ) const
{
    // TODO: handle anchored windows
    // Compute the real resizing offset
    int xOffset = width - rLayout.getWidth();
    int yOffset = height - rLayout.getHeight();

    // Check anchoring; this can change the values of xOffset and yOffset
    checkAnchors( rLayout.getWindow(), xOffset, yOffset );
    if( m_direction == kResizeS )
        xOffset = 0;
    if( m_direction == kResizeE )
        yOffset = 0;

    int newWidth = rLayout.getWidth() + xOffset;
    int newHeight = rLayout.getHeight() + yOffset;

    // Check boundaries
    if( newWidth < rLayout.getMinWidth() )
    {
        newWidth = rLayout.getMinWidth();
    }
    if( newWidth > rLayout.getMaxWidth() )
    {
        newWidth = rLayout.getMaxWidth();
    }
    if( newHeight < rLayout.getMinHeight() )
    {
        newHeight = rLayout.getMinHeight();
    }
    if( newHeight > rLayout.getMaxHeight() )
    {
        newHeight = rLayout.getMaxHeight();
    }

    if( newWidth == rLayout.getWidth() && newHeight == rLayout.getHeight() )
    {
        return;
    }

    // New offset, after the last corrections
    int xNewOffset = newWidth - rLayout.getWidth();
    int yNewOffset = newHeight - rLayout.getHeight();

    // Do the actual resizing
    rLayout.resize( newWidth, newHeight );

    // Move all the anchored windows
    WinSet_t::const_iterator it;
    if( m_direction == kResizeE ||
        m_direction == kResizeSE )
    {
        for( it = m_resizeMovingE.begin(); it != m_resizeMovingE.end(); it++ )
        {
            (*it)->move( (*it)->getLeft() + xNewOffset,
                         (*it)->getTop() );
        }
    }
    if( m_direction == kResizeE ||
        m_direction == kResizeSE )
    {
        for( it = m_resizeMovingS.begin(); it != m_resizeMovingS.end(); it++ )
        {
            (*it)->move( (*it)->getLeft(),
                         (*it)->getTop( )+ yNewOffset );
        }
    }
    if( m_direction == kResizeE ||
        m_direction == kResizeS ||
        m_direction == kResizeSE )
    {
        for( it = m_resizeMovingSE.begin(); it != m_resizeMovingSE.end(); it++ )
        {
            (*it)->move( (*it)->getLeft() + xNewOffset,
                         (*it)->getTop() + yNewOffset );
        }
    }
}


void WindowManager::maximize( TopWindow &rWindow )
{