qvfb.cpp

Qt4.5 提供的qvfb,最新版本

}

void QVFb::enableCursor( bool e )
{
    if ( skin && skin->hasCursor() ) {
	view->setCursor( Qt::BlankCursor );
        if (secondaryView)
            secondaryView->setCursor( Qt::BlankCursor );
    } else {
	view->setCursor( e ? Qt::ArrowCursor : Qt::BlankCursor );
        if (secondaryView)
            secondaryView->setCursor( e ? Qt::ArrowCursor : Qt::BlankCursor );
    }
    cursorAction->setChecked( e );
}

template <typename T>
void QVFb::createMenu(T *menu)
{
    menu->addMenu( createFileMenu() );
    menu->addMenu( createViewMenu() );
    menu->addSeparator();
    menu->addMenu( createHelpMenu() );
}

QMenu* QVFb::createFileMenu()
{
    QMenu *file = new QMenu( "File", this );
    file->addAction( "Configure...", this, SLOT(configure()), 0 );
    file->addSeparator();
    file->addAction( "&Save image...", this, SLOT(saveImage()), 0 );
    file->addAction( "&Animation...", this, SLOT(toggleAnimation()), 0 );
    file->addSeparator();
    file->addAction( "&Quit", qApp, SLOT(quit()) );
    return file;
}

QMenu* QVFb::createViewMenu()
{
    viewMenu = new QMenu( "View", this );
    cursorAction = viewMenu->addAction( "Show &Cursor", this,
                                        SLOT(toggleCursor()) );
    cursorAction->setCheckable(true);
    if ( view )
	enableCursor(true);
    viewMenu->addAction( "&Refresh Rate...", this, SLOT(changeRate()) );
    viewMenu->addSeparator();
    viewMenu->addAction( "No rotation", this, SLOT(setRot0()) );
    viewMenu->addAction( "90\260 rotation", this, SLOT(setRot90()) );
    viewMenu->addAction( "180\260 rotation", this, SLOT(setRot180()) );
    viewMenu->addAction( "270\260 rotation", this, SLOT(setRot270()) );
    viewMenu->addSeparator();
    viewMenu->addAction( "Zoom scale &0.5", this, SLOT(setZoomHalf()) );
    viewMenu->addAction( "Zoom scale 0.75", this, SLOT(setZoom075()) );
    viewMenu->addAction( "Zoom scale &1", this, SLOT(setZoom1()) );
    viewMenu->addAction( "Zoom scale &2", this, SLOT(setZoom2()) );
    viewMenu->addAction( "Zoom scale &3", this, SLOT(setZoom3()) );
    viewMenu->addAction( "Zoom scale &4", this, SLOT(setZoom4()) );
    viewMenu->addSeparator();
    viewMenu->addAction( "Zoom scale...", this, SLOT(setZoom()) );
    return viewMenu;
}


QMenu* QVFb::createHelpMenu()
{
    QMenu *help = new QMenu( "Help", this );
    help->addAction("About...", this, SLOT(about()));
    return help;
}

void QVFb::setZoom(double z)
{
    view->setZoom(z,z*skinscaleV/skinscaleH);
    if (secondaryView)
        secondaryView->setZoom(z,z*skinscaleV/skinscaleH);

    if (skin) {
	skin->setTransform(QMatrix().scale(z/skinscaleH,z/skinscaleV).rotate(90*view->displayRotation()));
        if (secondaryView)
            secondaryView->setFixedSize(
                    int(secondaryView->displayWidth()*z),
                    int(secondaryView->displayHeight()*z*skinscaleV/skinscaleH));
    }
}

void QVFb::setRotation(QVFbView::Rotation r)
{
    view->setRotation(r);
    if (secondaryView)
        secondaryView->setRotation(r);
    setZoom(view->zoomH());
}

void QVFb::setRot0()
{
    setRotation(QVFbView::Rot0);
}

void QVFb::setRot90()
{
    setRotation(QVFbView::Rot90);
}

void QVFb::setRot180()
{
    setRotation(QVFbView::Rot180);
}

void QVFb::setRot270()
{
    setRotation(QVFbView::Rot270);
}

void QVFb::setZoomHalf()
{
    setZoom(0.5);
}

void QVFb::setZoom075()
{
    setZoom(0.75);
}

void QVFb::setZoom1()
{
    setZoom(1);
}

void QVFb::setZoom()
{
    if ( !zoomer )
	zoomer = new Zoomer(this);
    zoomer->show();
}

void QVFb::setZoom2()
{
    setZoom(2);
}

void QVFb::setZoom3()
{
    setZoom(3);
}

void QVFb::setZoom4()
{
    setZoom(4);
}

void QVFb::saveImage()
{
    QImage img = view->image();
    QString filename = QFileDialog::getSaveFileName(this, "Save Main Screen image", "snapshot.png", "Portable Network Graphics (*.png)");
    if (!filename.isEmpty()){
        if(!img.save(filename,"PNG"))
                QMessageBox::critical(this, "Save Main Screen Image", "Save failed. Check that you have permission to write to the target directory.");
    }
    if (secondaryView) {
        QImage img = view->image();
        QString filename = QFileDialog::getSaveFileName(this, "Save Second Screen image", "snapshot.png", "Portable Network Graphics (*.png)");
        if (!filename.isEmpty()) {
            if(!img.save(filename,"PNG"))
                QMessageBox::critical(this, "Save Second Screen Image", "Save failed. Check that you have permission to write to the target directory.");
        }
    }
}

void QVFb::toggleAnimation()
{
    static AnimationSaveWidget *animWidget = 0;
    if ( !animWidget )
	animWidget = new AnimationSaveWidget(view);
    if ( animWidget->isVisible() )
	animWidget->hide();
    else
	animWidget->show();
}

void QVFb::toggleCursor()
{
    enableCursor(cursorAction->isChecked());
}

void QVFb::changeRate()
{
    if ( !rateDlg ) {
	rateDlg = new QVFbRateDialog( refreshRate, this );
	connect( rateDlg, SIGNAL(updateRate(int)), this, SLOT(setRate(int)) );
    }

    rateDlg->show();
}

void QVFb::setRate(int i)
{
    refreshRate = i;
    view->setRate(i);
    if (secondaryView)
        secondaryView->setRate(i);
}


void QVFb::about()
{
    QMessageBox::about(this, "About QVFB",
	"<h2>The Qt for Embedded Linux Virtual X11 Framebuffer</h2>"
	"<p>This application runs under Qt for X11, emulating a simple framebuffer, "
	"which the Qt for Embedded Linux server and clients can attach to just as if "
	"it was a hardware Linux framebuffer. "
	"<p>With the aid of this development tool, you can develop Qt for Embedded  "
	"Linux applications under X11 without having to switch to a virtual console. "
	"This means you can comfortably use your other development tools such "
	"as GUI profilers and debuggers."
    );
}

void QVFb::findSkins(const QString &currentSkin)
{
    skinnames.clear();
    skinfiles.clear();
    QDir dir(":/skins/","*.skin");
    const QFileInfoList l = dir.entryInfoList();
    int i = 1; // "None" is already in list at index 0
    for (QFileInfoList::const_iterator it = l.begin(); it != l.end(); ++it) {
	skinnames.append((*it).baseName()); // should perhaps be in file
	skinfiles.append((*it).filePath());
	if (((*it).baseName() + ".skin") == currentSkin)
	    currentSkinIndex = i;
	i++;
    }
}

class Config : public QDialog, public Ui::Config
{
public:
    Config(QWidget *parent)
        : QDialog(parent)
    {
        setupUi(this);
        setModal(true);

        connect(buttonOk, SIGNAL(clicked()), this, SLOT(accept()));
        connect(buttonCancel, SIGNAL(clicked()), this, SLOT(reject()));
    }
};

void QVFb::configure()
{
    config = new Config(this);

    int w = view->displayWidth();
    int h = view->displayHeight();

    // Need to block signals, because we connect to animateClick(),
    // since QCheckBox doesn't have setChecked(bool) in 2.x.
    chooseSize(QSize(w,h));
    config->skin->insertItems(config->skin->count(), skinnames);
    if (currentSkinIndex > 0)
	config->skin->setCurrentIndex(currentSkinIndex);
    config->skin->addItem(tr("Browse..."));
    config->touchScreen->setChecked(view->touchScreenEmulation());
    config->lcdScreen->setChecked(view->lcdScreenEmulation());
    chooseDepth(view->displayDepth(), view->displayFormat());
    connect(config->skin, SIGNAL(activated(int)), this, SLOT(skinConfigChosen(int)));
    if ( view->gammaRed() == view->gammaGreen() && view->gammaGreen() == view->gammaBlue() ) {
	config->gammaslider->setValue(int(view->gammaRed()*400));
	config->rslider->setValue(100);
	config->gslider->setValue(100);
	config->bslider->setValue(100);
    } else {
	config->gammaslider->setValue(100);
	config->rslider->setValue(int(view->gammaRed()*400));
	config->gslider->setValue(int(view->gammaGreen()*400));
	config->bslider->setValue(int(view->gammaBlue()*400));
    }
    connect(config->gammaslider, SIGNAL(valueChanged(int)), this, SLOT(setGamma400(int)));
    connect(config->rslider, SIGNAL(valueChanged(int)), this, SLOT(setR400(int)));
    connect(config->gslider, SIGNAL(valueChanged(int)), this, SLOT(setG400(int)));
    connect(config->bslider, SIGNAL(valueChanged(int)), this, SLOT(setB400(int)));
    updateGammaLabels();

    double ogr=view->gammaRed(), ogg=view->gammaGreen(), ogb=view->gammaBlue();
    qApp->setQuitOnLastWindowClosed(false);

    hide();
    if ( config->exec() ) {
	int id = view->displayId(); // not settable yet
	if ( config->size_176_220->isChecked() ) {
	    w=176; h=220;
	} else if ( config->size_240_320->isChecked() ) {
	    w=240; h=320;
	} else if ( config->size_320_240->isChecked() ) {
	    w=320; h=240;
	} else if ( config->size_640_480->isChecked() ) {
	    w=640; h=480;
	} else if ( config->size_800_600->isChecked() ) {
	    w=800; h=600;
	} else if ( config->size_1024_768->isChecked() ) {
	    w=1024; h=768;
	} else {
	    w=config->size_width->value();
	    h=config->size_height->value();
	}
	int d;
	if ( config->depth_1->isChecked() )
	    d=1;
	else if ( config->depth_4gray->isChecked() )
	    d=4;
	else if ( config->depth_8->isChecked() )
	    d=8;
	else if ( config->depth_12->isChecked() )
	    d=12;
	else if ( config->depth_15->isChecked() )
	    d = 15;
	else if ( config->depth_16->isChecked() )
	    d=16;
	else if ( config->depth_18->isChecked() )
	    d=18;
	else if ( config->depth_24->isChecked() )
	    d=24;
	else
	    d=32;
	QVFbView::PixelFormat displayFormat = config->depth_32_argb->isChecked()
					      ? QVFbView::ARGBFormat : QVFbView::DefaultFormat;
	int skinIndex = config->skin->currentIndex();
	if ( w != view->displayWidth() || h != view->displayHeight()
		|| d != view->displayDepth() || skinIndex != currentSkinIndex ) {
	    QVFbView::Rotation rot = view->displayRotation();
	    int r = ((rot == QVFbView::Rot90)  ?  90 :
		    ((rot == QVFbView::Rot180) ? 180 :
		    ((rot == QVFbView::Rot270) ? 270 : 0 )));
	    currentSkinIndex = skinIndex;
	    init( id, w, h, d, r, skinIndex > 0 ? skinfiles[skinIndex-1] : QString::null );
	}
	view->setViewFormat(displayFormat);
	view->setTouchscreenEmulation( config->touchScreen->isChecked() );
	bool lcdEmulation = config->lcdScreen->isChecked();
	view->setLcdScreenEmulation( lcdEmulation );
	if ( lcdEmulation )
	    setZoom3();
    } else {
	view->setGamma(ogr, ogg, ogb);
    }
    show();
    qApp->setQuitOnLastWindowClosed(true);
    delete config;
    config=0;
}

void QVFb::chooseSize(const QSize& sz)
{
    config->size_width->blockSignals(true);
    config->size_height->blockSignals(true);
    config->size_width->setValue(sz.width());
    config->size_height->setValue(sz.height());
    config->size_width->blockSignals(false);
    config->size_height->blockSignals(false);
    config->size_custom->setChecked(true); // unless changed by settings below
    config->size_176_220->setChecked(sz == QSize(176,220));
    config->size_240_320->setChecked(sz == QSize(240,320));
    config->size_320_240->setChecked(sz == QSize(320,240));
    config->size_640_480->setChecked(sz == QSize(640,480));
    config->size_800_600->setChecked(sz == QSize(800,600));
    config->size_1024_768->setChecked(sz == QSize(1024,768));
}

void QVFb::chooseDepth(int depth, QVFbView::PixelFormat displayFormat)
{
    config->depth_1->setChecked(depth==1);
    config->depth_4gray->setChecked(depth==4);
    config->depth_8->setChecked(depth==8);
    config->depth_12->setChecked(depth==12);
    config->depth_15->setChecked(depth==15);
    config->depth_16->setChecked(depth==16);
    config->depth_18->setChecked(depth==18);
    config->depth_24->setChecked(depth==24);
    config->depth_32->setChecked(depth==32 && displayFormat != QVFbView::ARGBFormat);
    config->depth_32_argb->setChecked(depth==32 && displayFormat == QVFbView::ARGBFormat);