C++ QLayout::setContentsMargins方法代码示例

void WWidgetGroup::setup(QDomNode node) {
    setContentsMargins(0, 0, 0, 0);

    // Set background pixmap if available
    if (!WWidget::selectNode(node, "BackPath").isNull()) {
        setPixmapBackground(WWidget::getPath(WWidget::selectNodeQString(node, "BackPath")));
    }

    QLayout* pLayout = NULL;
    if (!XmlParse::selectNode(node, "Layout").isNull()) {
        QString layout = XmlParse::selectNodeQString(node, "Layout");
        if (layout == "vertical") {
            pLayout = new QVBoxLayout();
            pLayout->setSpacing(0);
            pLayout->setContentsMargins(0, 0, 0, 0);
            pLayout->setAlignment(Qt::AlignCenter);
        } else if (layout == "horizontal") {
            pLayout = new QHBoxLayout();
            pLayout->setSpacing(0);
            pLayout->setContentsMargins(0, 0, 0, 0);
            pLayout->setAlignment(Qt::AlignCenter);
        }
    }

    if (pLayout) {
        setLayout(pLayout);
    }
}

UBZoomPalette::UBZoomPalette(QWidget* parent)
    : UBFloatingPalette(Qt::BottomRightCorner, parent)
    , mIsExpanded(1)
{
    mBoardController = UBApplication::boardController;
    QLayout* layout = new QVBoxLayout(this);
    mCurrentZoomButton = new QPushButton(parent);
    mCurrentZoomButton->setStyleSheet(QString("QPushButton { color: white; background-color: transparent; border: none; font-family: Arial; font-weight: bold; font-size: 20px }"));
    mCurrentZoomButton->setFocusPolicy(Qt::NoFocus);
    connect(mCurrentZoomButton, SIGNAL(clicked(bool)), this, SLOT(showHideExtraButton()));
    connect(mBoardController, SIGNAL(zoomChanged(qreal)), this, SLOT(refreshPalette()));
    connect(mBoardController, SIGNAL(activeSceneChanged()), this, SLOT(refreshPalette()));

    mHundredButton = new QPushButton(parent);
    mHundredButton->setStyleSheet(QString("QPushButton { color: white; background-color: transparent; border: none; font-family: Arial; font-weight: bold; font-size: 20px }"));
    mHundredButton->setFocusPolicy(Qt::NoFocus);
    mHundredButton->setIcon(QIcon(":/images/stylusPalette/restoreZoom.png"));
    mHundredButton->setIconSize(QSize(42,42));
    connect(mHundredButton, SIGNAL(clicked(bool)), this, SLOT(goHundred()));

    layout->setContentsMargins(radius() + 15, 4, radius() + 15, 4);
    layout->addWidget(mHundredButton);
    layout->addWidget(mCurrentZoomButton);
    hide();
    refreshPalette();
}

void
ViewManager::insertViewStep( int before, ViewStep* step)
{
    m_steps.insert( before, step );
    QLayout* layout = step->widget()->layout();
    if ( layout )
    {
        layout->setContentsMargins( 0, 0, 0, 0 );
    }
    m_stack->insertWidget( before, step->widget() );

    connect( step, &ViewStep::nextStatusChanged,
             this, [this]( bool status )
    {
        ViewStep* vs = qobject_cast< ViewStep* >( sender() );
        if ( vs )
        {
            if ( vs == m_steps.at( m_currentStep ) )
                m_next->setEnabled( status );
        }
    } );

    m_stack->setCurrentIndex( 0 );
    step->widget()->setFocus();
}

QgsAttributeFormEditorWidget::QgsAttributeFormEditorWidget( QgsEditorWidgetWrapper* editorWidget, QgsAttributeForm* form )
    : QWidget( form )
    , mWidget( editorWidget )
    , mForm( form )
    , mMode( DefaultMode )
    , mMultiEditButton( new QgsMultiEditToolButton() )
    , mBlockValueUpdate( false )
    , mIsMixed( false )
    , mIsChanged( false )
{
  if ( !mWidget || !mForm )
    return;

  QLayout* l = new QHBoxLayout();
  l->setMargin( 0 );
  l->setContentsMargins( 0, 0, 0, 0 );
  l->addWidget( mWidget->widget() );

  if ( mWidget->widget() )
  {
    mWidget->widget()->setObjectName( mWidget->field().name() );
  }
  connect( mWidget, SIGNAL( valueChanged( const QVariant& ) ), this, SLOT( editorWidgetChanged( const QVariant & ) ) );
  connect( mMultiEditButton, SIGNAL( resetFieldValueTriggered() ), this, SLOT( resetValue() ) );
  connect( mMultiEditButton, SIGNAL( setFieldValueTriggered() ), this, SLOT( setFieldTriggered() ) );

  mMultiEditButton->setField( mWidget->field() );

  setLayout( l );
  updateWidgets();
}

/*!
    \internal
*/
QLayout *QFormBuilder::create(DomLayout *ui_layout, QLayout *layout, QWidget *parentWidget)
{
    // Is this a temporary layout widget used to represent QLayout hierarchies in Designer?
    // Set its margins to 0.
    bool layoutWidget = d->processingLayoutWidget();
    QLayout *l = QAbstractFormBuilder::create(ui_layout, layout, parentWidget);
    if (layoutWidget) {
        const QFormBuilderStrings &strings = QFormBuilderStrings::instance();
        int left, top, right, bottom;
        left = top = right = bottom = 0;
        const DomPropertyHash properties = propertyMap(ui_layout->elementProperty());

        if (DomProperty *prop = properties.value(strings.leftMarginProperty))
            left = prop->elementNumber();

        if (DomProperty *prop = properties.value(strings.topMarginProperty))
            top = prop->elementNumber();

        if (DomProperty *prop = properties.value(strings.rightMarginProperty))
            right = prop->elementNumber();

        if (DomProperty *prop = properties.value(strings.bottomMarginProperty))
            bottom = prop->elementNumber();

        l->setContentsMargins(left, top, right, bottom);
        d->setProcessingLayoutWidget(false);
    }
    return l;
}

ItemSelectorWidget::ItemSelectorWidget( QWidget* parent )
    :StylableWidget(parent), m_clearText( false )
{
    QLayout* layout = new FlowLayout( this, 0, 0, 0 );
    layout->setContentsMargins( 0, 0, 0, 0 );
    layout->setSpacing( 0 );
}

StickyNoteEditDialog::StickyNoteEditDialog()
: QDialog(NULL, Qt::FramelessWindowHint|Qt::SubWindow)
, _edit(NULL)
, _noteInset(10)
{
	// make this window a child of the BumpTop window to hide it in the task bar
	// HWND hwnd = WindowFromDC(getDC());
	// SetParent(hwnd, winOS->GetWindowsHandle());

	// resize and center the window
	resize(320, 320);
	move(winOS->GetWindowWidth() / 2 - width() / 2,
		winOS->GetWindowHeight() / 2 - height() / 2);
	setStyleSheet(QT_NT("QDialog {")
		QT_NT("border: 0px;")
	QT_NT("}"));
	setAttribute(Qt::WA_TranslucentBackground);

	// create the dialog content
	QLayout * layout = NULL;
	layout = new QHBoxLayout(this);
	layout->setContentsMargins(20, 20, 25, 30);	
		_edit = new StickyNoteTextEdit();
		_edit->setStyleSheet(QT_NT("QTextEdit {")
			QT_NT("background: rgb(0,0,0,0);")
			QT_NT("border: 0px;")
			QT_NT("selection-color: rgb(240,240,240);")
			QT_NT("selection-background-color: rgb(60,60,60);")
		QT_NT("}"));
		layout->addWidget(_edit);
	connect(_edit, SIGNAL(accept()), this, SLOT(onEditAccept()));

	// try and forward focus events to the edit field
	setFocusProxy(_edit);
}

RenderWidget::RenderWidget(QWidget *parent, Qt::WindowFlags f)
    : QWidget(parent, f)
    , mRootNode(0)
{

    osgViewer::CompositeViewer& viewer = CompositeViewer::get();

    osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
    //ds->setNumMultiSamples(8);

    osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
    traits->windowName = "";
    traits->windowDecoration = true;
    traits->x = 0;
    traits->y = 0;
    traits->width = width();
    traits->height = height();
    traits->doubleBuffer = true;
    traits->alpha = ds->getMinimumNumAlphaBits();
    traits->stencil = ds->getMinimumNumStencilBits();
    traits->sampleBuffers = ds->getMultiSamples();
    traits->samples = ds->getNumMultiSamples();
    // Doesn't make much sense as we're running on demand updates, and there seems to be a bug with the refresh rate when running multiple QGLWidgets
    traits->vsync = false;

    mView = new osgViewer::View;

    osg::ref_ptr<osgQt::GraphicsWindowQt> window = new osgQt::GraphicsWindowQt(traits.get());
    QLayout* layout = new QHBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(window->getGLWidget());
    setLayout(layout);

    // Pass events through this widget first
    window->getGLWidget()->installEventFilter(this);

    mView->getCamera()->setGraphicsContext(window);
    mView->getCamera()->setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
    mView->getCamera()->setViewport( new osg::Viewport(0, 0, traits->width, traits->height) );
    mView->getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(traits->width)/static_cast<double>(traits->height), 1.0f, 10000.0f );

    SceneUtil::LightManager* lightMgr = new SceneUtil::LightManager;
    lightMgr->setStartLight(1);
    lightMgr->setLightingMask(Mask_Lighting);
    mRootNode = lightMgr;

    mView->getCamera()->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
    mView->getCamera()->getOrCreateStateSet()->setMode(GL_CULL_FACE, osg::StateAttribute::ON);

    mView->setSceneData(mRootNode);

    // Press S to reveal profiling stats
    mView->addEventHandler(new osgViewer::StatsHandler);

    mView->getCamera()->setCullMask(~(Mask_UpdateVisitor));

    viewer.addView(mView);
    viewer.setDone(false);
    viewer.realize();
}

void BackgroundWidget::resetWidgetLayout(MainWidget &widget)
{
	// If the widget has layout, remove its margins because main widgets layout has its own margins.
	QLayout *layout = widget.layout();
	if (layout != nullptr) {
		layout->setContentsMargins(0, 0, 0, 0);
	}
}

void WWidgetGroup::setup(QDomNode node, const SkinContext& context) {
    setContentsMargins(0, 0, 0, 0);

    // Set background pixmap if available
    if (context.hasNode(node, "BackPath")) {
        setPixmapBackground(context.getSkinPath(context.selectString(node, "BackPath")));
    }

    QLayout* pLayout = NULL;
    if (context.hasNode(node, "Layout")) {
        QString layout = context.selectString(node, "Layout");
        if (layout == "vertical") {
            pLayout = new QVBoxLayout();
            pLayout->setSpacing(0);
            pLayout->setContentsMargins(0, 0, 0, 0);
            pLayout->setAlignment(Qt::AlignCenter);
        } else if (layout == "horizontal") {
            pLayout = new QHBoxLayout();
            pLayout->setSpacing(0);
            pLayout->setContentsMargins(0, 0, 0, 0);
            pLayout->setAlignment(Qt::AlignCenter);
        }
    }

    if (pLayout && context.hasNode(node, "SizeConstraint")) {
        QMap<QString, QLayout::SizeConstraint> constraints;
        constraints["SetDefaultConstraint"] = QLayout::SetDefaultConstraint;
        constraints["SetFixedSize"] = QLayout::SetFixedSize;
        constraints["SetMinimumSize"] = QLayout::SetMinimumSize;
        constraints["SetMaximumSize"] = QLayout::SetMaximumSize;
        constraints["SetMinAndMaxSize"] = QLayout::SetMinAndMaxSize;
        constraints["SetNoConstraint"] = QLayout::SetNoConstraint;

        QString sizeConstraintStr = context.selectString(node, "SizeConstraint");
        if (constraints.contains(sizeConstraintStr)) {
            pLayout->setSizeConstraint(constraints[sizeConstraintStr]);
        } else {
            qDebug() << "Could not parse SizeConstraint:" << sizeConstraintStr;
        }
    }

    if (pLayout) {
        setLayout(pLayout);
    }
}

void
CQGroupBox::
calculateFrame()
{
  QLayout *l = layout();
  if (! l) return;

  l->setContentsMargins(marginLeft(), spaceTop(), marginRight(), spaceBottom());
}

WLabel::WLabel(QWidget * parent) : WWidget(parent)
{
    m_pLabel = new QLabel(this);
    QLayout* pLayout = new QVBoxLayout(this);
    pLayout->setContentsMargins(0, 0, 0, 0);
    pLayout->addWidget(m_pLabel);
    setLayout(pLayout);
    m_qsText = "";
}

// 设置 widget 的 padding 和 spacing
void UiUtil::setWidgetPaddingAndSpacing(QWidget *widget, int padding, int spacing) {
    // 设置 Widget 的 padding 和 spacing
    QLayout *layout = widget->layout();

    if (nullptr != layout) {
        layout->setContentsMargins(padding, padding, padding, padding);
        layout->setSpacing(spacing);
    }
}

WNumber::WNumber(QWidget * parent) : WWidget(parent)
{
    m_pLabel = new QLabel(this);
    QLayout* pLayout = new QVBoxLayout(this);
    pLayout->setContentsMargins(0, 0, 0, 0);
    pLayout->addWidget(m_pLabel);
    setLayout(pLayout);
    m_qsText = "";
    m_dConstFactor = 0.;
}

bool Drawer::eventFilter(QObject *obj, QEvent *event)
{
    const QEvent::Type type = event->type();

    if (QEvent::Move == type || QEvent::Resize == type) {
        QLayout *t = layout();
        if (t && 16 != t->contentsMargins().right()) {
            t->setContentsMargins(0, 0, 16, 0);
        }
    }
    return OverlayWidget::eventFilter(obj, event);
}