C++ QLabel::size方法代码示例

StepPreviewDialog::StepPreviewDialog(const Step *_target, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::StepPreviewDialog)
{
    ui->setupUi(this);
    QTextEdit *textWidget;
    QPixmap pic;
    QLabel *disp;

    // set the preview widget in accordance to the type
    switch(_target->Type)
    {
    case Step::Text:
    case Step::Console:
        textWidget = new QTextEdit(_target->TextContent);
        textWidget->setReadOnly (true);
        ui->verticalLayout->addWidget (textWidget, 1);
        textWidget->show ();
        break;
    case Step::Screenshot:
        pic = QPixmap::fromImage (QImage(_target->ScreenshotPath));
        disp = new QLabel();
        disp->size ().setHeight (250);
        disp->size ().setWidth (430);
        ui->verticalLayout->addWidget (disp, 1);
        disp->show();
        disp->setPixmap (pic.scaled(disp->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
        break;
    default:
        break;


    }

}

void MainWindow::setThumbnail(int i) {
    QLabel *screenshotLabel;

    if (thumbnails[i] == NULL) {
        screenshotLabel = new QLabel;
        screenshotLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        screenshotLabel->setAlignment(Qt::AlignCenter);
        screenshotLabel->setMinimumSize(240, 160);

        layout->addWidget(screenshotLabel, i / 3, i % 3);
        thumbnails[i] = screenshotLabel;
    }
    else {
        screenshotLabel = thumbnails[i];
    }

    QScreen *srn = QApplication::screens().at(0);
    QPixmap workspacePixmap = srn->grabWindow(QApplication::desktop()->winId());

    screenshotLabel->setPixmap(
        workspacePixmap.scaled(
            screenshotLabel->size(),
            Qt::KeepAspectRatio,
            Qt::SmoothTransformation
        )
    );
}

void DragDropArea::mousePressEvent(QMouseEvent *event)
{
    QLabel *child = static_cast<QLabel*>(childAt(event->pos()));
    if (!child)
        return;

    // Only drag children with dynamic property: "drag"
    if (!child->property("drag").toBool())
        return;

    QPoint hotSpot = event->pos() - child->pos();

    QMimeData *mimeData = new QMimeData;
    mimeData->setText(child->text());
    mimeData->setData("application/x-hotspot",
                      QByteArray::number(hotSpot.x())
                      + " " + QByteArray::number(hotSpot.y()));

    QPixmap pixmap(child->size());
    child->render(&pixmap);

    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData);
    drag->setPixmap(pixmap);
    drag->setHotSpot(hotSpot);
    drag->exec();
}

/*! \internal */
QRect QAccessibleDisplay::imagePosition() const
{
    QLabel *label = qobject_cast<QLabel *>(widget());
    if (!label)
        return QRect();
    const QPixmap *pixmap = label->pixmap();
    if (!pixmap)
        return QRect();

    return QRect(label->mapToGlobal(label->pos()), label->size());
}

/**
 * @brief ImageHandler::setImage
 * @param qLabel
 * @param image
 */
void ImageHandler::setImage(QLabel& qLabel, cv::Mat image, QImage::Format imageFormat){
    cv::Mat convertIm;
    //convert to RGB for QT labels
    if(image.channels() > 1)
        cv::cvtColor(image, convertIm, CV_BGR2RGB);
    else
        convertIm = image;
    //refit the Mat to fit inside the QLabel
    convertIm = refit(qLabel.size(), convertIm);
    QImage im = QImage((const unsigned char*) (convertIm.data),
                       convertIm.cols, convertIm.rows,convertIm.step, imageFormat);
    qLabel.setPixmap(QPixmap::fromImage(im));
    qLabel.resize( qLabel.pixmap()->size());
}

PasswordDialog *PasswordDialog::getPassword(QWidget *parent, const QString &windowTitle, const QString &description,
                                            const QString &errorMessage)
{
    auto d = new PasswordDialog(parent);
    d->setWindowTitle(windowTitle);
    d->ui.descriptionLabel->setText(description);
    d->ui.passwordLineEdit->setEchoMode(QLineEdit::Password);

    // fight the word wrapping beast, also see below
    int l,r,t,b; // we're gonna need the horizontal margins
    d->ui.verticalLayout->getContentsMargins(&l,&t,&r,&b);
    QList<QLabel*> fixedLabels; // and the labels we adjusted

    // 1. fix the dialog width, assuming to be wanted.
    d->setMinimumWidth(d->width());
    // 2. fix the label width
    fixedLabels << d->ui.descriptionLabel;
    // NOTICE: d->ui.descriptionLabel is inside a grid layout, which however has 0 margins
    d->ui.descriptionLabel->setMinimumWidth(d->width() - (l+r));
    // 3. have QLabel figure the size for that width and the content
    d->ui.descriptionLabel->adjustSize();
    // 4. make the label a fixed size element
    d->ui.descriptionLabel->setFixedSize(d->ui.descriptionLabel->size());
    d->adjustSize();

    if (!errorMessage.isEmpty()) {
        QLabel *errorLabel = new QLabel(d);
        d->ui.verticalLayout->insertWidget(0, errorLabel);
        errorLabel->setWordWrap(true);
        errorLabel->setText(errorMessage + QLatin1String("\n<hr>"));
        errorLabel->setTextFormat(Qt::RichText);

        // wordwrapping labels are a problem of its own
        fixedLabels << errorLabel;
        errorLabel->setMinimumWidth(d->width() - (l+r));
        errorLabel->adjustSize();
        errorLabel->setFixedSize(errorLabel->size());
    }

    d->adjustSize();
    d->setMinimumWidth(0);
    foreach(QLabel *label, fixedLabels) {
        label->setMinimumSize(0, 0);
        label->setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
    }

/*! \internal */
QRect QAccessibleDisplay::imagePosition(QAccessible2::CoordinateType coordType)
{
    QLabel *label = qobject_cast<QLabel *>(widget());
    if (!label)
        return QRect();
    const QPixmap *pixmap = label->pixmap();
    if (!pixmap)
        return QRect();

    switch (coordType) {
    case QAccessible2::RelativeToScreen:
        return QRect(label->mapToGlobal(label->pos()), label->size());
    case QAccessible2::RelativeToParent:
        return label->geometry();
    }

    return QRect();
}

PasswordDialog::PasswordDialog(const char *head, QWidget* parent, const char* name, bool modal, WFlags wflags)
   : QDialog(parent, name, modal, wflags)
{
    debugT("Here we go!!\n");
    
   _head = head;

   // (David) Layout management
   QVBoxLayout *vLay = new QVBoxLayout(this, 10 /* border */, 5);

   //
   // Bei Bedarf einen kleinen Kommentar als Label einfuegen
   // English please !!! David.
   if (_head)
   {
      QLabel *l;
      
      l = new QLabel(_head, this);
      l->adjustSize();
      l->setMinimumSize(l->size());
      vLay->addWidget(l);
      // l->setGeometry( 10, 10, 200, 20 );
   }

   // The horizontal layout for label + lineedit
   QHBoxLayout *hLay = new QHBoxLayout(5);
   vLay->addLayout(hLay);
   //
   // Die eine oder zwei Zeile(n) mit der Passwortabfrage
   //
   QLabel *l_password = new QLabel(klocale->translate("Password"), this);
   l_password->adjustSize();
   l_password->setMinimumSize(l_password->size());
   hLay->addWidget(l_password,0);
   //l_password->setGeometry( 10, 40, 80, 30 );
   
   _w_password = new QLineEdit( this );
   //_w_password->setGeometry( 90, 40, 100, 30 );
   _w_password->setEchoMode( QLineEdit::Password );
   _w_password->adjustSize();
   _w_password->setFixedHeight(_w_password->height());
   hLay->addWidget(_w_password,10);
   
   //
   // Connect vom LineEdit herstellen und Accelerator
   //
   QAccel *ac = new QAccel(this);
   ac->connectItem( ac->insertItem(Key_Escape), this, SLOT(reject()) );
   
   connect( _w_password, SIGNAL(returnPressed()), SLOT(accept()) );
   
   //
   // Eine vertikale Linie erzeugen
   //
   QFrame *f = new QFrame(this);
   f->setLineWidth(1);
   f->setMidLineWidth(1);
   f->setFrameStyle( QFrame::HLine|QFrame::Raised);
   //f->setGeometry( 10, 80, 180, 2 );
   f->setMinimumHeight(5);
   vLay->addWidget(f,0);
   
   //
   // Die Buttons "OK" & "Cancel" erzeugen
   //
   QHBoxLayout *hBLay = new QHBoxLayout(5);
   vLay->addLayout(hBLay);

   hBLay->addStretch();

   QPushButton *b1, *b2;
   b1 = new QPushButton(klocale->translate("OK"), this);
   //b1->setGeometry( 10, 90, 80, 30 );
   b1->adjustSize();
   b1->setFixedSize(b1->size());   
   hBLay->addWidget(b1);

   hBLay->addStretch();
   //or hBLay->addSpacing(10);
   
   b2 = new QPushButton(klocale->translate("Cancel"), this);
   //b2->setGeometry( 110, 90, 80, 30 );
   b2->adjustSize();
   b2->setFixedSize(b2->size());   
   hBLay->addWidget(b2);

   hBLay->addStretch();
   
   // Buttons mit Funktionaliataet belegen
   connect( b1, SIGNAL(clicked()), SLOT(accept()) );
   connect( b2, SIGNAL(clicked()), SLOT(reject()) );
   
   // Fenstertitel
   setCaption(klocale->translate("Password"));
   
   // Focus
   _w_password->setFocus();
   
   vLay->activate();
   setMinimumSize(200, 50);
//.........这里部分代码省略.........

KFontChooser::KFontChooser( QWidget *parent, const char *name )
	: QWidget( parent, name )
{
	int i;
	
	fnt = QFont( "helvetica", 12 );
	changed = False;
	
	QBoxLayout *topLayout = new QVBoxLayout( this, 10, 5 );
	topLayout->addStretch( 5 );
	
	QBoxLayout *stackLayout = new QVBoxLayout( 4 );
	
	topLayout->addLayout( stackLayout );
		
	cmbFont = new QComboBox( false, this );
	cmbFont->setFixedHeight( cmbFont->sizeHint().height() );
	
	getFontList( fixedList, true );
	getFontList( fontList );
	
	cmbFont->insertStrList( &fontList );
	QStrListIterator it( fontList );
	for ( i = 0; it.current(); ++it, i++ ) {
		if ( !strcmp( fnt.family(), it.current() ) )
			cmbFont->setCurrentItem( i );
	}
	
	connect( cmbFont, SIGNAL( activated( const char * ) ),
		SLOT( slotSelectFont( const char * ) ) );
		
	QLabel *label = new QLabel( cmbFont, i18n("&Typeface"), this );
	label->adjustSize();
	label->setMinimumSize( label->size() );
	
	stackLayout->addWidget( label );
	stackLayout->addWidget( cmbFont );

	cbBold = new QCheckBox(  i18n("&Bold"), this );
	cbBold->setMinimumSize( cbBold->sizeHint() );
	cbBold->setChecked( fnt.bold() );
	connect( cbBold, SIGNAL( toggled( bool ) ), SLOT( slotFontBold( bool ) ) );
	
	topLayout->addWidget( cbBold );
	
	cbItalic = new QCheckBox(  i18n("&Italic"), this );
	cbItalic->setMinimumSize( cbItalic->sizeHint() );
	cbItalic->setChecked( fnt.italic() );
	connect( cbItalic, SIGNAL( toggled( bool ) ), SLOT( slotFontItalic( bool ) ) );
	
	topLayout->addWidget( cbItalic );
	
	QBoxLayout *pushLayout = new QHBoxLayout(  2 );
	
	topLayout->addLayout( pushLayout );
	
	stackLayout = new QVBoxLayout( 4 );
	
	pushLayout->addLayout( stackLayout, 10 );
	pushLayout->addSpacing( 10 );
	
	sbSize = new KNumericSpinBox( this );
	
	sbSize->setStep( 1 );
	sbSize->setRange( 8, 16 );
	sbSize->setValue( 12 );
	sbSize->adjustSize();

	connect( sbSize, SIGNAL( valueDecreased() ),
		 SLOT( slotFontSize() ) );
		 
	connect( sbSize, SIGNAL( valueIncreased() ),
		 SLOT( slotFontSize() ) );
	
	label = new QLabel( sbSize, i18n("&Size"), this );
	label->setMinimumSize( label->sizeHint() );

	cmbCharset = new QComboBox( false, this );
	
	cmbCharset->adjustSize();
	cmbCharset->setInsertionPolicy( QComboBox::NoInsertion );
	connect( cmbCharset, SIGNAL( activated( const char * ) ),
		 SLOT( slotCharset( const char * ) ) );
	
	sbSize->setFixedHeight( cmbCharset->height() );
	sbSize->setMinimumWidth(sbSize->width());
	cmbCharset->setFixedHeight( cmbCharset->height() );
	cmbCharset->setMinimumWidth( cmbCharset->width());

	stackLayout->addWidget( label );
	stackLayout->addWidget( sbSize );
	
	stackLayout = new QVBoxLayout( 4 );
	
	pushLayout->addLayout( stackLayout, 30 );
	
	label = new QLabel( cmbCharset, i18n("&Character set"), this );
	label->adjustSize();
	label->setMinimumSize( label->size() );
	
//.........这里部分代码省略.........