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Diffstat (limited to 'src/charts/axis/verticalaxis.cpp')
| -rw-r--r-- | src/charts/axis/verticalaxis.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/src/charts/axis/verticalaxis.cpp b/src/charts/axis/verticalaxis.cpp new file mode 100644 index 00000000..64c940f1 --- /dev/null +++ b/src/charts/axis/verticalaxis.cpp @@ -0,0 +1,231 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the Qt Enterprise Charts Add-on. +** +** $QT_BEGIN_LICENSE$ +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "verticalaxis_p.h" +#include "qabstractaxis.h" +#include "chartpresenter_p.h" +#include <QDebug> + +QT_CHARTS_BEGIN_NAMESPACE + +VerticalAxis::VerticalAxis(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis) + : CartesianChartAxis(axis, item, intervalAxis) +{ +} + +VerticalAxis::~VerticalAxis() +{ +} + +void VerticalAxis::updateGeometry() +{ + const QVector<qreal> &layout = ChartAxisElement::layout(); + + if (layout.isEmpty()) + return; + + QStringList labelList = labels(); + + QList<QGraphicsItem *> lines = gridItems(); + QList<QGraphicsItem *> labels = labelItems(); + QList<QGraphicsItem *> shades = shadeItems(); + QList<QGraphicsItem *> arrow = arrowItems(); + QGraphicsTextItem *title = titleItem(); + + Q_ASSERT(labels.size() == labelList.size()); + Q_ASSERT(layout.size() == labelList.size()); + + const QRectF &axisRect = axisGeometry(); + const QRectF &gridRect = gridGeometry(); + + qreal height = axisRect.bottom(); + + + //arrow + QGraphicsLineItem *arrowItem = static_cast<QGraphicsLineItem*>(arrow.at(0)); + + //arrow position + if (axis()->alignment() == Qt::AlignLeft) + arrowItem->setLine(axisRect.right(), gridRect.top(), axisRect.right(), gridRect.bottom()); + else if (axis()->alignment() == Qt::AlignRight) + arrowItem->setLine(axisRect.left(), gridRect.top(), axisRect.left(), gridRect.bottom()); + + //title + QRectF titleBoundingRect; + QString titleText = axis()->titleText(); + qreal availableSpace = axisRect.width() - labelPadding(); + if (!titleText.isEmpty() && titleItem()->isVisible()) { + availableSpace -= titlePadding() * 2.0; + qreal minimumLabelWidth = ChartPresenter::textBoundingRect(axis()->labelsFont(), + QStringLiteral("...")).width(); + qreal titleSpace = availableSpace - minimumLabelWidth; + title->setHtml(ChartPresenter::truncatedText(axis()->titleFont(), titleText, qreal(90.0), + titleSpace, gridRect.height(), + titleBoundingRect)); + title->setTextWidth(titleBoundingRect.height()); + + titleBoundingRect = title->boundingRect(); + + QPointF center = gridRect.center() - titleBoundingRect.center(); + if (axis()->alignment() == Qt::AlignLeft) + title->setPos(axisRect.left() - titleBoundingRect.width() / 2.0 + titleBoundingRect.height() / 2.0 + titlePadding(), center.y()); + else if (axis()->alignment() == Qt::AlignRight) + title->setPos(axisRect.right() - titleBoundingRect.width() / 2.0 - titleBoundingRect.height() / 2.0 - titlePadding(), center.y()); + + title->setTransformOriginPoint(titleBoundingRect.center()); + title->setRotation(270); + + availableSpace -= titleBoundingRect.height(); + } + + for (int i = 0; i < layout.size(); ++i) { + //items + QGraphicsLineItem *gridItem = static_cast<QGraphicsLineItem *>(lines.at(i)); + QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem *>(arrow.at(i + 1)); + QGraphicsTextItem *labelItem = static_cast<QGraphicsTextItem *>(labels.at(i)); + + //grid line + gridItem->setLine(gridRect.left(), layout[i], gridRect.right(), layout[i]); + + //label text wrapping + QString text = labelList.at(i); + QRectF boundingRect; + // don't truncate empty labels + if (text.isEmpty()) { + labelItem->setHtml(text); + } else { + qreal labelHeight = (axisRect.height() / layout.count()) - (2 * labelPadding()); + QString truncatedText = ChartPresenter::truncatedText(axis()->labelsFont(), text, + axis()->labelsAngle(), + availableSpace, + labelHeight, boundingRect); + labelItem->setTextWidth(ChartPresenter::textBoundingRect(axis()->labelsFont(), + truncatedText).width()); + labelItem->setHtml(truncatedText); + } + + //label transformation origin point + const QRectF &rect = labelItem->boundingRect(); + QPointF center = rect.center(); + labelItem->setTransformOriginPoint(center.x(), center.y()); + qreal widthDiff = rect.width() - boundingRect.width(); + qreal heightDiff = rect.height() - boundingRect.height(); + + //ticks and label position + if (axis()->alignment() == Qt::AlignLeft) { + labelItem->setPos(axisRect.right() - rect.width() + (widthDiff / 2.0) - labelPadding(), layout[i] - center.y()); + tickItem->setLine(axisRect.right() - labelPadding(), layout[i], axisRect.right(), layout[i]); + } else if (axis()->alignment() == Qt::AlignRight) { + labelItem->setPos(axisRect.left() + labelPadding() - (widthDiff / 2.0), layout[i] - center.y()); + tickItem->setLine(axisRect.left(), layout[i], axisRect.left() + labelPadding(), layout[i]); + } + + //label in between + bool forceHide = false; + if (intervalAxis() && (i + 1) != layout.size()) { + qreal lowerBound = qMin(layout[i], gridRect.bottom()); + qreal upperBound = qMax(layout[i + 1], gridRect.top()); + const qreal delta = lowerBound - upperBound; + // Hide label in case visible part of the category at the grid edge is too narrow + if (delta < boundingRect.height() + && (lowerBound == gridRect.bottom() || upperBound == gridRect.top()) + && !intervalAxis()) { + forceHide = true; + } else { + labelItem->setPos(labelItem->pos().x() , lowerBound - (delta / 2.0) - center.y()); + } + } + + //label overlap detection - compensate one pixel for rounding errors + if (labelItem->pos().y() + boundingRect.height() > height || forceHide || + (labelItem->pos().y() + (heightDiff / 2.0) - 1.0) > axisRect.bottom() || + labelItem->pos().y() + (heightDiff / 2.0) < (axisRect.top() - 1.0)) { + labelItem->setVisible(false); + } + else { + labelItem->setVisible(true); + height=labelItem->pos().y(); + } + + //shades + if ((i + 1) % 2 && i > 1) { + QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem *>(shades.at(i / 2 - 1)); + qreal lowerBound = qMin(layout[i - 1], gridRect.bottom()); + qreal upperBound = qMax(layout[i], gridRect.top()); + rectItem->setRect(gridRect.left(), upperBound, gridRect.width(), lowerBound - upperBound); + if (rectItem->rect().height() <= 0.0) + rectItem->setVisible(false); + else + rectItem->setVisible(true); + } + + // check if the grid line and the axis tick should be shown + qreal y = gridItem->line().p1().y(); + if ((y < gridRect.top() || y > gridRect.bottom())) + { + gridItem->setVisible(false); + tickItem->setVisible(false); + }else{ + gridItem->setVisible(true); + tickItem->setVisible(true); + } + + } + //begin/end grid line in case labels between + if (intervalAxis()) { + QGraphicsLineItem *gridLine; + gridLine = static_cast<QGraphicsLineItem *>(lines.at(layout.size())); + gridLine->setLine(gridRect.left(), gridRect.top(), gridRect.right(), gridRect.top()); + gridLine->setVisible(true); + gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size() + 1)); + gridLine->setLine(gridRect.left(), gridRect.bottom(), gridRect.right(), gridRect.bottom()); + gridLine->setVisible(true); + } +} + +QSizeF VerticalAxis::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const +{ + Q_UNUSED(constraint); + QSizeF sh(0, 0); + + if (axis()->titleText().isEmpty() || !titleItem()->isVisible()) + return sh; + + switch (which) { + case Qt::MinimumSize: { + QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(), + QStringLiteral("...")); + sh = QSizeF(titleRect.height() + (titlePadding() * 2.0), titleRect.width()); + break; + } + case Qt::MaximumSize: + case Qt::PreferredSize: { + QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(), axis()->titleText()); + sh = QSizeF(titleRect.height() + (titlePadding() * 2.0), titleRect.width()); + break; + } + default: + break; + } + + return sh; +} + +QT_CHARTS_END_NAMESPACE |