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#include "chartcolorbaraxisy_p.h"
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#include <QtCharts/QAbstractAxis>
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#include <private/chartpresenter_p.h>
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//#include <QtCharts/QColorBarAxis>
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#include "colorbaraxis/qcolorbaraxis.h"
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#include <private/abstractchartlayout_p.h>
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#include <QtWidgets/QGraphicsLayout>
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#include <QtCore/QtMath>
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#include <QtCore/QDebug>
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QT_CHARTS_BEGIN_NAMESPACE
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ChartColorBarAxisY::ChartColorBarAxisY(QColorBarAxis *axis, QLinearGradient gradient, QGraphicsItem *item)
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: VerticalAxis(axis, item),
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m_axis(axis),
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m_gradient(gradient)
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{
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QObject::connect(m_axis, SIGNAL(tickCountChanged(int)), this, SLOT(handleTickCountChanged(int)));
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QObject::connect(m_axis, SIGNAL(minorTickCountChanged(int)),
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this, SLOT(handleMinorTickCountChanged(int)));
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QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
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createColorBar();
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}
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ChartColorBarAxisY::~ChartColorBarAxisY()
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{
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}
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QVector<qreal> ChartColorBarAxisY::calculateLayout() const
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{
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int tickCount = m_axis->tickCount();
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Q_ASSERT(tickCount >= 2);
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QVector<qreal> points;
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points.resize(tickCount);
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const QRectF &gridRect = gridGeometry();
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const qreal deltaY = gridRect.height() / (qreal(tickCount) - 1.0);
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for (int i = 0; i < tickCount; ++i)
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points[i] = qreal(i) * -deltaY + gridRect.bottom();
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return points;
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}
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void ChartColorBarAxisY::updateGeometry()
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{
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const QVector<qreal> &layout = ChartAxisElement::layout();
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if (layout.isEmpty())
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return;
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setLabels(createValueLabels(min(),max(),layout.size(),m_axis->labelFormat()));
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VerticalAxis::updateGeometry();
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}
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void ChartColorBarAxisY::handleTickCountChanged(int tick)
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{
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Q_UNUSED(tick);
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QGraphicsLayoutItem::updateGeometry();
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if (presenter()) presenter()->layout()->invalidate();
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}
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void ChartColorBarAxisY::handleMinorTickCountChanged(int tick)
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{
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Q_UNUSED(tick);
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QGraphicsLayoutItem::updateGeometry();
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if (presenter())
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presenter()->layout()->invalidate();
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}
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void ChartColorBarAxisY::handleLabelFormatChanged(const QString &format)
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{
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Q_UNUSED(format);
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QGraphicsLayoutItem::updateGeometry();
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if(presenter()) presenter()->layout()->invalidate();
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}
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QSizeF ChartColorBarAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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Q_UNUSED(constraint)
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QSizeF sh;
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QSizeF base = VerticalAxis::sizeHint(which, constraint);
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QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat());
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qreal width = 0;
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// Height of vertical axis sizeHint indicates the maximum distance labels can extend past
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// first and last ticks. Base height is irrelevant.
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qreal height = 0;
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switch (which)
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{
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case Qt::MinimumSize: {
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QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
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QStringLiteral("..."),
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axis()->labelsAngle());
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width = boundingRect.width() + labelPadding() + base.width() + 1.0;
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height = boundingRect.height() / 2.0;
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sh = QSizeF(width, height);
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break;
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}
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case Qt::PreferredSize: {
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qreal labelWidth = 0.0;
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qreal firstHeight = -1.0;
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foreach (const QString& s, ticksList) {
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QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
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labelWidth = qMax(rect.width(), labelWidth);
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height = rect.height();
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if (firstHeight < 0.0)
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firstHeight = height;
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}
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width = labelWidth + labelPadding() + base.width() + 2.0; //two pixels of tolerance
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height = qMax(height, firstHeight) / 2.0;
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sh = QSizeF(width, height);
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break;
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}
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default:
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break;
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}
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return sh;
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}
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void ChartColorBarAxisY::createColorBar()
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{
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QGradientStops stops = m_gradient.stops();
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QLinearGradient gradient(0,0,1,250);
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foreach(QGradientStop stop, stops)
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{
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gradient.setColorAt(1-stop.first,stop.second);
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}
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QPixmap image = QPixmap(50,250);
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QPainter painter(&image);
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QRectF rect(0,0,50,250);
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painter.fillRect(rect,gradient);
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QGraphicsRectItem *colorbar = new QGraphicsRectItem(rect, this);
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setGraphicsItem(colorbar);
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}
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#include "moc_chartcolorbaraxisy_p.cpp"
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QT_CHARTS_END_NAMESPACE
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