qvfb.cpp

Qt4.5 提供的qvfb,最新版本

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**
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** Contact: Qt Software Information ([e-mail])
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** General Public License version 3.0 as published by the Free Software
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** packaging of this file.  Please review the following information to
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#include "qvfb.h"
#include "qvfbview.h"
#ifdef Q_WS_X11
#include "qvfbx11view.h"
#endif
#include "qvfbratedlg.h"
#include "ui_config.h"
#include "qanimationwriter.h"

#include <deviceskin.h>

#include <QMenuBar>
#include <QMenu>
#include <QApplication>
#include <QMessageBox>
#include <QComboBox>
#include <QLabel>
#include <QFileDialog>
#include <QSlider>
#include <QSpinBox>
#include <QLayout>
#include <QRadioButton>
#include <QImage>
#include <QPixmap>
#include <QCheckBox>
#include <QCursor>
#include <QTime>
#include <QScrollArea>
#include <QProgressBar>
#include <QPushButton>
#include <QTextStream>
#include <QFile>
#include <QFileInfo>
#include <QDebug>

#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>

QT_BEGIN_NAMESPACE

// =====================================================================

static const char *red_on_led_xpm[] = {
"11 11 10 1",
" 	c None",
".	c #FF0000",
"+	c #FF4C4C",
"@	c #FF7A7A",
"#	c #D30000",
"$	c #FF9393",
"%	c #BA0000",
"&	c #FFFFFF",
"*	c #7F0000",
"=	c #000000",
"           ",
"   .++@@   ",
"  .....+@  ",
" ##...$.+@ ",
" %#..$&$.+ ",
" *#...$..+ ",
" *%#...... ",
" =*%#..... ",
"  =*%###.  ",
"   ===*.   ",
"           "};

static const char *red_off_led_xpm[] = {
"11 11 12 1",
" 	c None",
".	c #CDB7B4",
"+	c #D2BFBD",
"@	c #DBCBCA",
"#	c #E5D9D8",
"$	c #BC9E9B",
"%	c #E2D6D5",
"&	c #AD8986",
"*	c #FFFFFF",
"=	c #A8817D",
"-	c #B2908D",
";	c #6F4D4A",
"           ",
"   .++@#   ",
"  .....@#  ",
" $$...%.@# ",
" &$..%*%.@ ",
" =-...%..+ ",
" =&-...... ",
" ;==-..... ",
"  ;=&-$$.  ",
"   ;==&$   ",
"           "};

static bool copyButtonConfiguration(const QString &prefix, int displayId)
{
    const QString destDir = QString(QLatin1String("/tmp/qtembedded-%1/")).arg(displayId);
    const QFileInfo src(prefix + QLatin1String("defaultbuttons.conf"));
    const QFileInfo dst(destDir + QLatin1String("defaultbuttons.conf"));
    unlink(dst.absoluteFilePath().toLatin1().constData());
    if (!src.exists())
        return false;
    const bool rc = QFile::copy(src.absoluteFilePath(), dst.absoluteFilePath());
    if (!rc)
        qWarning() << "Failed to copy the button configuration file " << src.absoluteFilePath() << " to " <<  dst.absoluteFilePath() << '.';
    return rc;
}

// =====================================================================

class AnimationSaveWidget : public QWidget {
    Q_OBJECT
public:
    AnimationSaveWidget(QVFbAbstractView *v);
    ~AnimationSaveWidget();
    bool detectPpmtoMpegCommand();
    void timerEvent(QTimerEvent *te);
    void convertToMpeg(QString filename);
    void removeTemporaryFiles();
protected slots:
    void toggleRecord();
    void reset();
    void save();
private:
    QVFbAbstractView *view;
    QProgressBar *progressBar;
    QLabel *statusText;
    bool haveMpeg, savingAsMpeg, recording;
    QCheckBox *mpegSave;
    QAnimationWriter *animation;
    QPushButton *recBt, *resetBt, *saveBt;
    QLabel *timeDpy, *recLED;
    int timerId, progressTimerId;
    QPixmap recOn, recOff;
    QTime tm;
    int elapsed, imageNum;
};

// =====================================================================

Zoomer::Zoomer(QVFb* target) :
    qvfb(target)
{
    QVBoxLayout *layout = new QVBoxLayout(this);
    QSlider *sl = new QSlider(Qt::Horizontal);
    sl->setMinimum(10);
    sl->setMaximum(64);
    sl->setPageStep(1);
    sl->setValue(32);
    layout->addWidget(sl);
    connect(sl,SIGNAL(valueChanged(int)),this,SLOT(zoom(int)));
    label = new QLabel();
    layout->addWidget(label);
}

void Zoomer::zoom(int z)
{
    double d = (double)z/32.0;
    qvfb->setZoom(d);
    label->setText(QString::number(d,'g',2));
}

// =====================================================================

QVFb::QVFb( int display_id, int w, int h, int d, int r, const QString &skin, DisplayType displayType, QWidget *parent, Qt::WindowFlags flags )
    : QMainWindow( parent, flags )
{
    this->displayType = displayType;
    view = 0;
    secondaryView = 0;
    scroller = 0;
    this->skin = 0;
    currentSkinIndex = -1;
    findSkins(skin);
    zoomer = 0;
    QPixmap pix(":/res/images/logo.png");
    setWindowIcon( pix );
    rateDlg = 0;
    refreshRate = 30;
#if QT_VERSION >= 0x030000
    // When compiling with Qt 3 we need to create the menu first to
    // avoid scroll bars in the main window
    createMenu( menuBar() );
    init( display_id, w, h, d, r, skin );
    enableCursor( true );
#else
    init( display_id, w, h, d, r, skin );
    createMenu( menuBar() );
#endif
}

QVFb::~QVFb()
{
}

void QVFb::popupMenu()
{
    QMenu *pm = new QMenu( this );
    createMenu( pm );
    pm->exec(QCursor::pos());
}

void QVFb::init( int display_id, int pw, int ph, int d, int r, const QString& skin_name )
{
    delete view;
    view = 0;
    delete secondaryView;
    secondaryView = 0;
    delete scroller;
    scroller = 0;
    delete skin;
    skin = 0;

    skinscaleH = skinscaleV = 1.0;
    QVFbView::Rotation rot = ((r ==  90) ? QVFbView::Rot90  :
			     ((r == 180) ? QVFbView::Rot180 :
			     ((r == 270) ? QVFbView::Rot270 :
					   QVFbView::Rot0 )));
    if ( !skin_name.isEmpty() ) {
	const bool vis = isVisible();
	DeviceSkinParameters parameters;
	QString readError;
	if (parameters.read(skin_name,DeviceSkinParameters::ReadAll, &readError)) {
	    skin = new DeviceSkin(parameters, this);
	    connect(skin, SIGNAL(popupMenu()), this, SLOT(popupMenu()));
	    const int sw = parameters.screenSize().width();
	    const int sh = parameters.screenSize().height();
	    const int sd = parameters.screenDepth;
            if (!pw) pw = sw;
            if (!ph) ph = sh;
            if (d < 0) {
                if (sd)
                    d = sd;
                else
                    d = -d;
            }
            if (vis)
                hide();
    	    menuBar()->hide();
	    scroller = 0;
#ifdef Q_WS_X11
	    if (displayType == X11)
		view = new QVFbX11View( display_id, pw, ph, d, rot, skin );
	    else
#endif
		view = new QVFbView( display_id, pw, ph, d, rot, skin );
	    skin->setView( view );
	    view->setContentsMargins( 0, 0, 0, 0 );
            view->setTouchscreenEmulation(!parameters.hasMouseHover);
	    connect(skin, SIGNAL(skinKeyPressEvent(int,QString,bool)), view, SLOT(skinKeyPressEvent(int,QString,bool)));
	    connect(skin, SIGNAL(skinKeyReleaseEvent(int,QString,bool)), view, SLOT(skinKeyReleaseEvent(int,QString,bool)));

	    copyButtonConfiguration(skin->prefix(), view->displayId());

	    setCentralWidget( skin );
	    adjustSize();
	    skinscaleH = (double)sw/pw;
	    skinscaleV = (double)sh/ph;
	    if ( skinscaleH != 1.0 || skinscaleH != 1.0 )
		setZoom(skinscaleH);
	    view->show();

            if (parameters.hasSecondaryScreen()) {
                const QSize ssize = parameters.secondaryScreenSize();
                // assumes same depth and rotation
#ifdef Q_WS_X11
		if (displayType == X11)
		    secondaryView = new QVFbX11View( display_id+1, ssize.width(), ssize.height(), d, rot, skin );
		else
#endif
		    secondaryView = new QVFbView( display_id+1, ssize.width(), ssize.height(), d, rot, skin );
                skin->setSecondaryView(secondaryView);
                secondaryView->show();
            }

	    if ( vis ) show();
	} else {
	    qWarning("%s", qPrintable(readError));
	}
    }

    // If we failed to get a skin or we were not supplied
    //	    with one then fallback to a framebuffer without
    //	    a skin
    if (!skin){
	// Default values
	if (!pw)
            pw = 240;
	if (!ph)
            ph = 320;
        if (!d)
            d = 32;
        else if (d < 0)
            d = -d;

     	if (currentSkinIndex != -1) {
	    clearMask();
            setParent( 0, 0 );
            move( pos() );
            show();
	    //unset fixed size:
	    setMinimumSize(0,0);
	    setMaximumSize(QWIDGETSIZE_MAX,QWIDGETSIZE_MAX);
	}
	menuBar()->show();
	scroller = new QScrollArea(this);
	scroller->setFocusPolicy(Qt::NoFocus); // don't steal key events from the embedded app
#ifdef Q_WS_X11
	if (displayType == X11)
	    view = new QVFbX11View( display_id, pw, ph, d, rot, scroller );
	else
#endif
	    view = new QVFbView( display_id, pw, ph, d, rot, scroller );
	scroller->setWidget(view);
	view->setContentsMargins( 0, 0, 0, 0 );
	setCentralWidget(scroller);
#if QT_VERSION >= 0x030000
	ph += 2;					// avoid scrollbar
#endif
	scroller->show();
	// delete defaultbuttons.conf if it was left behind...
	unlink(QFileInfo(QString("/tmp/qtembedded-%1/defaultbuttons.conf").arg(view->displayId())).absoluteFilePath().toLatin1().constData());
        if (secondaryView)
            unlink(QFileInfo(QString("/tmp/qtembedded-%1/defaultbuttons.conf").arg(view->displayId()+1)).absoluteFilePath().toLatin1().constData());
    }
    view->setRate(refreshRate);
    if (secondaryView) {
        secondaryView->setRate(refreshRate);
    }
    // Resize QVFb to the new size
    QSize newSize = view->sizeHint();

    // ... fudge factor
    newSize += QSize(20, 35);

    resize(newSize);

    setWindowTitle(QString("Virtual framebuffer %1x%2 %3bpp Display :%4 Rotate %5")
               .arg(view->displayWidth()).arg(view->displayHeight())
               .arg(d).arg(display_id).arg(r));