C++ (Cpp) QScrollArea::setHorizontalScrollBar Examples

Example #1

File: tst_qabstractscrollarea.cpp Project: mpvader/qt

void tst_QAbstractScrollArea::setScrollBars()
{
    QScrollArea scrollArea;
    scrollArea.resize(300, 300);
    scrollArea.show();

    QPointer<QScrollBar> vbar = scrollArea.verticalScrollBar();
    QPointer<QScrollBar> hbar = scrollArea.horizontalScrollBar();

    // Now set properties on the scroll bars
    scrollArea.verticalScrollBar()->setInvertedAppearance(true);
    scrollArea.verticalScrollBar()->setInvertedControls(true);
    scrollArea.verticalScrollBar()->setTracking(true);
    scrollArea.verticalScrollBar()->setRange(-100, 100);
    scrollArea.verticalScrollBar()->setPageStep(42);
    scrollArea.verticalScrollBar()->setSingleStep(3);
    scrollArea.verticalScrollBar()->setValue(43);
    scrollArea.horizontalScrollBar()->setInvertedAppearance(true);
    scrollArea.horizontalScrollBar()->setInvertedControls(true);
    scrollArea.horizontalScrollBar()->setTracking(true);
    scrollArea.horizontalScrollBar()->setRange(-100, 100);
    scrollArea.horizontalScrollBar()->setPageStep(42);
    scrollArea.horizontalScrollBar()->setSingleStep(3);
    scrollArea.horizontalScrollBar()->setValue(43);

    qApp->processEvents();

    // Then replace the scroll bars
    scrollArea.setVerticalScrollBar(new QScrollBar);
    scrollArea.setHorizontalScrollBar(new QScrollBar);

    // Check that the old ones were deleted
    QVERIFY(!vbar);
    QVERIFY(!hbar);

    qApp->processEvents();

    // Check that all properties have been populated
    QVERIFY(scrollArea.verticalScrollBar()->invertedAppearance());
    QVERIFY(scrollArea.verticalScrollBar()->invertedControls());
    QVERIFY(scrollArea.verticalScrollBar()->hasTracking());
    QVERIFY(scrollArea.verticalScrollBar()->isVisible());
    QCOMPARE(scrollArea.verticalScrollBar()->minimum(), -100);
    QCOMPARE(scrollArea.verticalScrollBar()->maximum(), 100);
    QCOMPARE(scrollArea.verticalScrollBar()->pageStep(), 42);
    QCOMPARE(scrollArea.verticalScrollBar()->singleStep(), 3);
    QCOMPARE(scrollArea.verticalScrollBar()->value(), 43);
    QVERIFY(scrollArea.horizontalScrollBar()->invertedAppearance());
    QVERIFY(scrollArea.horizontalScrollBar()->invertedControls());
    QVERIFY(scrollArea.horizontalScrollBar()->hasTracking());
    QVERIFY(scrollArea.horizontalScrollBar()->isVisible());
    QCOMPARE(scrollArea.horizontalScrollBar()->minimum(), -100);
    QCOMPARE(scrollArea.horizontalScrollBar()->maximum(), 100);
    QCOMPARE(scrollArea.horizontalScrollBar()->pageStep(), 42);
    QCOMPARE(scrollArea.horizontalScrollBar()->singleStep(), 3);
    QCOMPARE(scrollArea.horizontalScrollBar()->value(), 43);
}

Example #2

File: mywidget.cpp Project: JongHong/photoqt-dev

// Setup widget
void MyWidget::setup(int layoutMargin, QString borderColor, QString backgroundColor) {

	// Some styling
	visibleArea = QSize(600,400);
	this->borderColor = borderColor;
	this->backgroundColor = (backgroundColor == "" ? "rgba(0,0,0,200)" : backgroundColor);
	borderLeftRight = -1;
	borderTopDown = -1;
	fullscreen = false;

	// The different QRects
	rectShown = QRect();
	rectHidden = QRect(0,-10,10,10);
	rectAni = QRect();

	// The current geometry and position
	isShown = false;
	this->setGeometry(rectHidden);

	// Fading
	backOpacityShow = 0.5;
	backOpacityCur = 0;
	centerOpacityCur = 0;
	fade = new QTimeLine;
	fadeIN = true;
	fadeEffectCenter = new QGraphicsOpacityEffect;
	connect(fade, SIGNAL(valueChanged(qreal)), this, SLOT(fadeStep()));
	connect(fade, SIGNAL(finished()), this, SLOT(aniFinished()));

	// The current widget look
	this->setStyleSheet(QString("background: rgba(0,0,0,%1);").arg(255*backOpacityShow));

	// the central widget containing all the information
	center = new QWidget(this);
	center->setGraphicsEffect(fadeEffectCenter);
	center->setObjectName("center");
	// For some reason, if the border is not defined right here at the beginning, it wont be visible...
	if(borderColor == "")
		center->setStyleSheet(QString("#center { background: %1; border-radius: 10px; font-size: 12pt; }").arg(this->backgroundColor));
	else
		center->setStyleSheet(QString("#center {background: %1; border-radius: 15px; font-size: 12pt; border: 2px solid %2; }").arg(this->backgroundColor).arg(borderColor));

	// Create and set the scrollarea with main layout
	QVBoxLayout *central = new QVBoxLayout;
	central->setMargin(layoutMargin);
	QScrollArea *scroll = new QScrollArea(this);
	scroll->setObjectName("scrollWidget");
	scroll->setStyleSheet("QWidget#scrollWidget { background: transparent; padding-bottom: 3px; border-radius: 0px; }");
	QWidget *scrollWidget = new QWidget(scroll->widget());
	scrollWidget->setStyleSheet("background: transparent;");
	scroll->setWidgetResizable(true);
	scroll->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
	scrollWidget->setLayout(central);
	scroll->setWidget(scrollWidget);
	mainlayout = new QVBoxLayout;
	if(layoutMargin == 0) mainlayout->setMargin(0);
	center->setLayout(mainlayout);
	mainlayout->addWidget(scroll);

	// This widget gets the main layout set to
	centralWidget = new QWidget;
	central->addWidget(centralWidget);

	// And set the custom scrollbar
	scrollbar = new CustomScrollbar;
	scroll->setVerticalScrollBar(scrollbar);

	// And in case the monitor resolution is so small, that the horizontal scrollbar is visible:
	CustomScrollbar *scrollbarHor = new CustomScrollbar;
	scroll->setHorizontalScrollBar(scrollbarHor);

}