interface_widgets.cpp 19 KB
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/*****************************************************************************
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 * interface_widgets.cpp : Custom widgets for the main interface
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 ****************************************************************************
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 * Copyright (C) 2006-2008 the VideoLAN team
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 * $Id$
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 *
 * Authors: Clément Stenac <zorglub@videolan.org>
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 *          Jean-Baptiste Kempf <jb@videolan.org>
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 *          Rafaël Carré <funman@videolanorg>
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 *          Ilkka Ollakka <ileoo@videolan.org>
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 *
 * 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
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 * ( at your option ) any later version.
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 *
 * 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.
 *****************************************************************************/
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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
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#include "components/interface_widgets.hpp"
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#include "menus.hpp"             /* Popup menu on bgWidget */

#include <vlc_vout.h>
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#include <QLabel>
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#include <QToolButton>
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#include <QPalette>
#include <QResizeEvent>
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#include <QDate>
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#include <QMenu>
#include <QWidgetAction>
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#include <QDesktopWidget>
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#ifdef Q_WS_X11
# include <X11/Xlib.h>
# include <qx11info_x11.h>
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static void videoSync( void )
{
    /* Make sure the X server has processed all requests.
     * This protects other threads using distinct connections from getting
     * the video widget window in an inconsistent states. */
    XSync( QX11Info::display(), False );
}
#else
# define videoSync() (void)0
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#endif
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#include <math.h>

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class ReparentableWidget : public QWidget
{
private:
    VideoWidget *owner;
public:
    ReparentableWidget( VideoWidget *owner ) : owner( owner )
    {
    }

protected:
    void keyPressEvent( QKeyEvent *e )
    {
        emit owner->keyPressed( e );
    }
};

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/**********************************************************************
 * Video Widget. A simple frame on which video is drawn
 * This class handles resize issues
 **********************************************************************/
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VideoWidget::VideoWidget( intf_thread_t *_p_i )
    : QFrame( NULL )
      , p_intf( _p_i )
      , reparentable( NULL )
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{
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    /* Set the policy to expand in both directions */
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//    setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
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    layout = new QHBoxLayout( this );
    layout->setContentsMargins( 0, 0, 0, 0 );
    setLayout( layout );
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}

VideoWidget::~VideoWidget()
{
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    /* Ensure we are not leaking the video output. This would crash. */
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    assert( reparentable == NULL );
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}

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/**
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 * Request the video to avoid the conflicts
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 **/
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WId VideoWidget::request( int *pi_x, int *pi_y,
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                          unsigned int *pi_width, unsigned int *pi_height,
                          bool b_keep_size )
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{
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    msg_Dbg( p_intf, "Video was requested %i, %i", *pi_x, *pi_y );
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    if( reparentable != NULL )
    {
        msg_Dbg( p_intf, "embedded video already in use" );
        return NULL;
    }
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    if( b_keep_size )
    {
        *pi_width  = size().width();
        *pi_height = size().height();
    }

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    /* The Qt4 UI needs a fixed a widget ("this"), so that the parent layout is
     * not messed up when we the video is reparented. Hence, we create an extra
     * reparentable widget, that will be within the VideoWidget in windowed
     * mode, and within the root window (NULL parent) in full-screen mode.
     */
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    reparentable = new ReparentableWidget( this );
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    QLayout *innerLayout = new QHBoxLayout( reparentable );
    innerLayout->setContentsMargins( 0, 0, 0, 0 );

    /* The owner of the video window needs a stable handle (WinId). Reparenting
     * in Qt4-X11 changes the WinId of the widget, so we need to create another
     * dummy widget that stays within the reparentable widget. */
    QWidget *stable = new QWidget();
    QPalette plt = palette();
    plt.setColor( QPalette::Window, Qt::black );
    stable->setPalette( plt );
    stable->setAutoFillBackground(true);
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    /* Indicates that the widget wants to draw directly onto the screen.
       Widgets with this attribute set do not participate in composition
       management */
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    stable->setAttribute( Qt::WA_PaintOnScreen, true );

    innerLayout->addWidget( stable );

    layout->addWidget( reparentable );

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#ifdef Q_WS_X11
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    /* HACK: Only one X11 client can subscribe to mouse button press events.
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     * VLC currently handles those in the video display.
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     * Force Qt4 to unsubscribe from mouse press and release events. */
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    Display *dpy = QX11Info::display();
    Window w = stable->winId();
    XWindowAttributes attr;

    XGetWindowAttributes( dpy, w, &attr );
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    attr.your_event_mask &= ~(ButtonPressMask|ButtonReleaseMask);
    XSelectInput( dpy, w, attr.your_event_mask );
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#endif
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    videoSync();
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#ifndef NDEBUG
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    msg_Dbg( p_intf, "embedded video ready (handle %p)",
             (void *)stable->winId() );
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#endif
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    return stable->winId();
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}

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/* Set the Widget to the correct Size */
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/* Function has to be called by the parent
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   Parent has to care about resizing itself */
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void VideoWidget::SetSizing( unsigned int w, unsigned int h )
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{
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    if (reparentable->windowState() & Qt::WindowFullScreen )
        return;
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    msg_Dbg( p_intf, "Video is resizing to: %i %i", w, h );
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    videoSize.setWidth( w );
    videoSize.setHeight( h );
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    if( !isVisible() ) show();
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    updateGeometry(); // Needed for deinterlace
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    videoSync();
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}

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void VideoWidget::SetFullScreen( bool b_fs )
{
    const Qt::WindowStates curstate = reparentable->windowState();
    Qt::WindowStates newstate = curstate;
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    Qt::WindowFlags  newflags = reparentable->windowFlags();
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    if( b_fs )
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    {
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        newstate |= Qt::WindowFullScreen;
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        newflags |= Qt::WindowStaysOnTopHint;
    }
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    else
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    {
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        newstate &= ~Qt::WindowFullScreen;
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        newflags &= ~Qt::WindowStaysOnTopHint;
    }
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    if( newstate == curstate )
        return; /* no changes needed */

    if( b_fs )
    {   /* Go full-screen */
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        int numscreen = var_InheritInteger( p_intf, "qt-fullscreen-screennumber" );
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        /* if user hasn't defined screennumber, or screennumber that is bigger
         * than current number of screens, take screennumber where current interface
         * is
         */
        if( numscreen == -1 || numscreen > QApplication::desktop()->numScreens() )
            numscreen = QApplication::desktop()->screenNumber( p_intf->p_sys->p_mi );

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        QRect screenres = QApplication::desktop()->screenGeometry( numscreen );

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        reparentable->setParent( NULL, newflags );
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        reparentable->setWindowState( newstate );
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        /* To be sure window is on proper-screen in xinerama */
        if( !screenres.contains( reparentable->pos() ) )
        {
            msg_Dbg( p_intf, "Moving video to correct screen");
            reparentable->move( QPoint( screenres.x(), screenres.y() ) );
        }
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        reparentable->show();
    }
    else
    {   /* Go windowed */
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        reparentable->setWindowFlags( newflags );
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        reparentable->setWindowState( newstate );
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        layout->addWidget( reparentable );
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    }
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    videoSync();
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}

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void VideoWidget::release( void )
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{
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    msg_Dbg( p_intf, "Video is not needed anymore" );
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    //layout->removeWidget( reparentable );
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#ifdef WIN32
    /* Come back to default thumbnail for Windows 7 taskbar */
    LPTASKBARLIST3 p_taskbl;
    OSVERSIONINFO winVer;
    winVer.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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    if( GetVersionEx(&winVer) && winVer.dwMajorVersion > 5 )
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    {
        CoInitialize( 0 );

        if( S_OK == CoCreateInstance( &clsid_ITaskbarList,
                    NULL, CLSCTX_INPROC_SERVER,
                    &IID_ITaskbarList3,
                    (void **)&p_taskbl) )
        {
            p_taskbl->vt->HrInit(p_taskbl);

            HWND hroot = GetAncestor(reparentable->winId(),GA_ROOT);

            if (S_OK != p_taskbl->vt->SetThumbnailClip(p_taskbl, hroot, NULL))
                msg_Err(p_intf, "SetThumbNailClip failed");
            msg_Err(p_intf, "Releasing taskbar | root handle = %08x", hroot);
            p_taskbl->vt->Release(p_taskbl);
        }
        CoUninitialize();
    }
#endif

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    delete reparentable;
    reparentable = NULL;
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    videoSize = QSize();
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    updateGeometry();
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    hide();
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}
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QSize VideoWidget::sizeHint() const
{
    return videoSize;
}
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/**********************************************************************
 * Background Widget. Show a simple image background. Currently,
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 * it's album art if present or cone.
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 **********************************************************************/
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#define ICON_SIZE 128
#define MAX_BG_SIZE 400
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#define MIN_BG_SIZE 128
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BackgroundWidget::BackgroundWidget( intf_thread_t *_p_i )
                 :QWidget( NULL ), p_intf( _p_i )
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{
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    /* We should use that one to take the more size it can */
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    setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding);
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    /* A dark background */
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    setAutoFillBackground( true );
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    QPalette plt = palette();
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    plt.setColor( QPalette::Active, QPalette::Window , Qt::black );
    plt.setColor( QPalette::Inactive, QPalette::Window , Qt::black );
    setPalette( plt );

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    /* A cone in the middle */
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    label = new QLabel;
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    label->setMargin( 5 );
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/*    label->setMaximumHeight( MAX_BG_SIZE );
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    label->setMaximumWidth( MAX_BG_SIZE );
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    label->setMinimumHeight( MIN_BG_SIZE );
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    label->setMinimumWidth( MIN_BG_SIZE );*/
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    label->setAlignment( Qt::AlignCenter );
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    if( QDate::currentDate().dayOfYear() >= 354 )
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        label->setPixmap( QPixmap( ":/logo/vlc128-christmas.png" ) );
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    else
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        label->setPixmap( QPixmap( ":/logo/vlc128.png" ) );
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    QGridLayout *backgroundLayout = new QGridLayout( this );
    backgroundLayout->addWidget( label, 0, 1 );
    backgroundLayout->setColumnStretch( 0, 1 );
    backgroundLayout->setColumnStretch( 2, 1 );
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    CONNECT( THEMIM->getIM(), artChanged( QString ),
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             this, updateArt( const QString& ) );
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}

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BackgroundWidget::~BackgroundWidget()
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{}
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void BackgroundWidget::resizeEvent( QResizeEvent * event )
{
    if( event->size().height() <= MIN_BG_SIZE )
        label->hide();
    else
        label->show();
}

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void BackgroundWidget::updateArt( const QString& url )
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{
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    if( url.isEmpty() )
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    {
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        if( QDate::currentDate().dayOfYear() >= 354 )
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            label->setPixmap( QPixmap( ":/logo/vlc128-christmas.png" ) );
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        else
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            label->setPixmap( QPixmap( ":/logo/vlc128.png" ) );
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    }
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    else
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    {
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        QPixmap pixmap( url );
        if( pixmap.width() > label->maximumWidth() ||
            pixmap.height() > label->maximumHeight() )
        {
            pixmap = pixmap.scaled( label->maximumWidth(),
                          label->maximumHeight(), Qt::KeepAspectRatio );
        }

        label->setPixmap( pixmap );
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    }
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}

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void BackgroundWidget::contextMenuEvent( QContextMenuEvent *event )
{
    QVLCMenu::PopupMenu( p_intf, true );
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    event->accept();
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}
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#if 0
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#include <QPushButton>
#include <QHBoxLayout>

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/**********************************************************************
 * Visualization selector panel
 **********************************************************************/
VisualSelector::VisualSelector( intf_thread_t *_p_i ) :
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                                QFrame( NULL ), p_intf( _p_i )
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{
    QHBoxLayout *layout = new QHBoxLayout( this );
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    layout->setMargin( 0 );
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    QPushButton *prevButton = new QPushButton( "Prev" );
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    QPushButton *nextButton = new QPushButton( "Next" );
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    layout->addWidget( prevButton );
    layout->addWidget( nextButton );
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    layout->addStretch( 10 );
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    layout->addWidget( new QLabel( qtr( "Current visualization" ) ) );
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    current = new QLabel( qtr( "None" ) );
    layout->addWidget( current );

    BUTTONACT( prevButton, prev() );
    BUTTONACT( nextButton, next() );

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    setLayout( layout );
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    setMaximumHeight( 35 );
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}

VisualSelector::~VisualSelector()
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{}
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void VisualSelector::prev()
{
    char *psz_new = aout_VisualPrev( p_intf );
    if( psz_new )
    {
        current->setText( qfu( psz_new ) );
        free( psz_new );
    }
}

void VisualSelector::next()
{
    char *psz_new = aout_VisualNext( p_intf );
    if( psz_new )
    {
        current->setText( qfu( psz_new ) );
        free( psz_new );
    }
}
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#endif
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SpeedLabel::SpeedLabel( intf_thread_t *_p_intf, const QString& text,
                        QWidget *parent )
           : QLabel( text, parent ), p_intf( _p_intf )
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{
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    setToolTip( qtr( "Current playback speed.\nClick to adjust" ) );
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    /* Create the Speed Control Widget */
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    speedControl = new SpeedControlWidget( p_intf, this );
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    speedControlMenu = new QMenu( this );

    QWidgetAction *widgetAction = new QWidgetAction( speedControl );
    widgetAction->setDefaultWidget( speedControl );
    speedControlMenu->addAction( widgetAction );

    /* Change the SpeedRate in the Status Bar */
    CONNECT( THEMIM->getIM(), rateChanged( int ), this, setRate( int ) );

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    CONNECT( THEMIM, inputChanged( input_thread_t * ),
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             speedControl, activateOnState() );
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}
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SpeedLabel::~SpeedLabel()
{
        delete speedControl;
        delete speedControlMenu;
}
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/****************************************************************************
 * Small right-click menu for rate control
 ****************************************************************************/
void SpeedLabel::showSpeedMenu( QPoint pos )
{
    speedControlMenu->exec( QCursor::pos() - pos
                          + QPoint( 0, height() ) );
}

void SpeedLabel::setRate( int rate )
{
    QString str;
    str.setNum( ( 1000 / (double)rate ), 'f', 2 );
    str.append( "x" );
    setText( str );
    setToolTip( str );
    speedControl->updateControls( rate );
}

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/**********************************************************************
 * Speed control widget
 **********************************************************************/
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SpeedControlWidget::SpeedControlWidget( intf_thread_t *_p_i, QWidget *_parent )
                    : QFrame( _parent ), p_intf( _p_i )
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{
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    QSizePolicy sizePolicy( QSizePolicy::Maximum, QSizePolicy::Fixed );
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    sizePolicy.setHorizontalStretch( 0 );
    sizePolicy.setVerticalStretch( 0 );
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    speedSlider = new QSlider( this );
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    speedSlider->setSizePolicy( sizePolicy );
    speedSlider->setMaximumSize( QSize( 80, 200 ) );
    speedSlider->setOrientation( Qt::Vertical );
    speedSlider->setTickPosition( QSlider::TicksRight );

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    speedSlider->setRange( -34, 34 );
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    speedSlider->setSingleStep( 1 );
    speedSlider->setPageStep( 1 );
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    speedSlider->setTickInterval( 17 );
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    CONNECT( speedSlider, valueChanged( int ), this, updateRate( int ) );
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    QToolButton *normalSpeedButton = new QToolButton( this );
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    normalSpeedButton->setMaximumSize( QSize( 26, 20 ) );
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    normalSpeedButton->setAutoRaise( true );
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    normalSpeedButton->setText( "1x" );
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    normalSpeedButton->setToolTip( qtr( "Revert to normal play speed" ) );
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    CONNECT( normalSpeedButton, clicked(), this, resetRate() );
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    QVBoxLayout *speedControlLayout = new QVBoxLayout( this );
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    speedControlLayout->setContentsMargins( 4, 4, 4, 4 );
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    speedControlLayout->setSpacing( 4 );
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    speedControlLayout->addWidget( speedSlider );
    speedControlLayout->addWidget( normalSpeedButton );
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    activateOnState();
}
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void SpeedControlWidget::activateOnState()
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{
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    speedSlider->setEnabled( THEMIM->getIM()->hasInput() );
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}

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void SpeedControlWidget::updateControls( int rate )
{
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    if( speedSlider->isSliderDown() )
    {
        //We don't want to change anything if the user is using the slider
        return;
    }
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    double value = 17 * log( (double)INPUT_RATE_DEFAULT / rate ) / log( 2 );
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    int sliderValue = (int) ( ( value > 0 ) ? value + .5 : value - .5 );
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    if( sliderValue < speedSlider->minimum() )
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    {
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        sliderValue = speedSlider->minimum();
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    }
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    else if( sliderValue > speedSlider->maximum() )
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    {
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        sliderValue = speedSlider->maximum();
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    }
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    //Block signals to avoid feedback loop
    speedSlider->blockSignals( true );
    speedSlider->setValue( sliderValue );
    speedSlider->blockSignals( false );
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}

void SpeedControlWidget::updateRate( int sliderValue )
{
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    double speed = pow( 2, (double)sliderValue / 17 );
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    int rate = INPUT_RATE_DEFAULT / speed;
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    THEMIM->getIM()->setRate(rate);
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}

void SpeedControlWidget::resetRate()
{
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    THEMIM->getIM()->setRate( INPUT_RATE_DEFAULT );
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}
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CoverArtLabel::CoverArtLabel( QWidget *parent, intf_thread_t *_p_i )
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              : QLabel( parent ), p_intf( _p_i )
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{
    setContextMenuPolicy( Qt::ActionsContextMenu );
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    CONNECT( this, updateRequested(), this, askForUpdate() );
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    setMinimumHeight( 128 );
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    setMinimumWidth( 128 );
    setMaximumHeight( 128 );
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    setMaximumWidth( 128 );
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    setScaledContents( false );
    setAlignment( Qt::AlignCenter );
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    QList< QAction* > artActions = actions();
    QAction *action = new QAction( qtr( "Download cover art" ), this );
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    CONNECT( action, triggered(), this, askForUpdate() );
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    addAction( action );
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    showArtUpdate( "" );
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}

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CoverArtLabel::~CoverArtLabel()
{
    QList< QAction* > artActions = actions();
    foreach( QAction *act, artActions )
        removeAction( act );
}

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void CoverArtLabel::showArtUpdate( const QString& url )
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{
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    QPixmap pix;
    if( !url.isEmpty()  && pix.load( url ) )
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    {
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        pix = pix.scaled( maximumWidth(), maximumHeight(),
                          Qt::KeepAspectRatioByExpanding );
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    }
    else
    {
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        pix = QPixmap( ":/noart.png" );
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    }
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    setPixmap( pix );
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}

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void CoverArtLabel::askForUpdate()
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{
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    THEMIM->getIM()->requestArtUpdate();
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}

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TimeLabel::TimeLabel( intf_thread_t *_p_intf  ) :QLabel(), p_intf( _p_intf )
{
   b_remainingTime = false;
   setText( " --:--/--:-- " );
   setAlignment( Qt::AlignRight | Qt::AlignVCenter );
   setToolTip( qtr( "Toggle between elapsed and remaining time" ) );


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   CONNECT( THEMIM->getIM(), cachingChanged( float ),
            this, setCaching( float ) );
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   CONNECT( THEMIM->getIM(), positionUpdated( float, int64_t, int ),
             this, setDisplayPosition( float, int64_t, int ) );
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}

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void TimeLabel::setDisplayPosition( float pos, int64_t t, int length )
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{
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    if( pos == -1.f )
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    {
        setText( " --:--/--:-- " );
        return;
    }
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    int time = t / 1000000;
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    char psz_length[MSTRTIME_MAX_SIZE], psz_time[MSTRTIME_MAX_SIZE];
    secstotimestr( psz_length, length );
    secstotimestr( psz_time, ( b_remainingTime && length ) ? length - time
                                                           : time );

    QString timestr;
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    timestr.sprintf( " %s%s/%s ", (b_remainingTime && length) ? "-" : "",
                     psz_time, ( !length && time ) ? "--:--" : psz_length );
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    setText( timestr );
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}

void TimeLabel::toggleTimeDisplay()
{
    b_remainingTime = !b_remainingTime;
}
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void TimeLabel::setCaching( float f_cache )
{
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    QString amount;
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    amount.sprintf("Buff: %i%%", (int)(100*f_cache) );
    setText( amount );
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}

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