verticalaxis.cpp
251 lines
| 10.0 KiB
| text/x-c
|
CppLexer
Michal Klocek
|
r2111 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
|
Michal Klocek
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r2111 | ** All rights reserved. | ||
|
Titta Heikkala
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
|
Michal Klocek
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r2111 | ** | ||
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Titta Heikkala
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r2740 | ** This file is part of the Qt Charts module. | ||
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Michal Klocek
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r2111 | ** | ||
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Titta Heikkala
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
|
Titta Heikkala
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r2776 | ** agreement between you and The Qt Company. | ||
|
Michal Klocek
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r2111 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
|
Titta Heikkala
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r2740 | ** contact form at http://qt.io | ||
|
Michal Klocek
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r2111 | ** | ||
| ****************************************************************************/ | ||||
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Titta Heikkala
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r2714 | #include <private/verticalaxis_p.h> | ||
| #include <QtCharts/QAbstractAxis> | ||||
| #include <private/chartpresenter_p.h> | ||||
| #include <QtCore/QDebug> | ||||
|
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r2111 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r2111 | |||
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r2483 | VerticalAxis::VerticalAxis(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis) | ||
| : CartesianChartAxis(axis, item, intervalAxis) | ||||
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r2111 | { | ||
| } | ||||
| VerticalAxis::~VerticalAxis() | ||||
| { | ||||
| } | ||||
| void VerticalAxis::updateGeometry() | ||||
| { | ||||
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r2483 | const QVector<qreal> &layout = ChartAxisElement::layout(); | ||
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r2111 | |||
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r2759 | if (layout.isEmpty() && axis()->type() != QAbstractAxis::AxisTypeLogValue) | ||
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r2131 | return; | ||
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r2111 | |||
| QStringList labelList = labels(); | ||||
| QList<QGraphicsItem *> labels = labelItems(); | ||||
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r2483 | QList<QGraphicsItem *> arrow = arrowItems(); | ||
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r2539 | QGraphicsTextItem *title = titleItem(); | ||
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r2111 | |||
| Q_ASSERT(labels.size() == labelList.size()); | ||||
| Q_ASSERT(layout.size() == labelList.size()); | ||||
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r2131 | const QRectF &axisRect = axisGeometry(); | ||
| const QRectF &gridRect = gridGeometry(); | ||||
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r2111 | |||
| qreal height = axisRect.bottom(); | ||||
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r2133 | //arrow | ||
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r2483 | QGraphicsLineItem *arrowItem = static_cast<QGraphicsLineItem*>(arrow.at(0)); | ||
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r2133 | |||
| //arrow position | ||||
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r2483 | 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()); | ||||
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r2111 | |||
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r2148 | //title | ||
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r2415 | QRectF titleBoundingRect; | ||
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r2483 | QString titleText = axis()->titleText(); | ||
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r2540 | qreal availableSpace = axisRect.width() - labelPadding(); | ||
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r2483 | if (!titleText.isEmpty() && titleItem()->isVisible()) { | ||
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r2540 | availableSpace -= titlePadding() * 2.0; | ||
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r2712 | qreal minimumLabelWidth = ChartPresenter::textBoundingRect(axis()->labelsFont(), | ||
| QStringLiteral("...")).width(); | ||||
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r2540 | qreal titleSpace = availableSpace - minimumLabelWidth; | ||
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r2604 | title->setHtml(ChartPresenter::truncatedText(axis()->titleFont(), titleText, qreal(90.0), | ||
| titleSpace, gridRect.height(), | ||||
| titleBoundingRect)); | ||||
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Titta Heikkala
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r2607 | title->setTextWidth(titleBoundingRect.height()); | ||
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r2148 | |||
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r2415 | titleBoundingRect = title->boundingRect(); | ||
| QPointF center = gridRect.center() - titleBoundingRect.center(); | ||||
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r2540 | 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()); | ||||
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r2415 | title->setTransformOriginPoint(titleBoundingRect.center()); | ||
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r2148 | title->setRotation(270); | ||
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r2540 | |||
| availableSpace -= titleBoundingRect.height(); | ||||
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r2148 | } | ||
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r2759 | if (layout.isEmpty() && axis()->type() == QAbstractAxis::AxisTypeLogValue) | ||
| return; | ||||
| QList<QGraphicsItem *> lines = gridItems(); | ||||
| QList<QGraphicsItem *> shades = shadeItems(); | ||||
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r2111 | for (int i = 0; i < layout.size(); ++i) { | ||
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r2133 | //items | ||
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r2131 | QGraphicsLineItem *gridItem = static_cast<QGraphicsLineItem *>(lines.at(i)); | ||
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r2483 | QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem *>(arrow.at(i + 1)); | ||
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r2539 | QGraphicsTextItem *labelItem = static_cast<QGraphicsTextItem *>(labels.at(i)); | ||
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r2111 | |||
| //grid line | ||||
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r2483 | gridItem->setLine(gridRect.left(), layout[i], gridRect.right(), layout[i]); | ||
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r2111 | |||
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r2133 | //label text wrapping | ||
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r2111 | QString text = labelList.at(i); | ||
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r2534 | QRectF boundingRect; | ||
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r2604 | // don't truncate empty labels | ||
| if (text.isEmpty()) { | ||||
| labelItem->setHtml(text); | ||||
| } else { | ||||
| qreal labelHeight = (axisRect.height() / layout.count()) - (2 * labelPadding()); | ||||
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Titta Heikkala
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r2607 | QString truncatedText = ChartPresenter::truncatedText(axis()->labelsFont(), text, | ||
| axis()->labelsAngle(), | ||||
| availableSpace, | ||||
| labelHeight, boundingRect); | ||||
| labelItem->setTextWidth(ChartPresenter::textBoundingRect(axis()->labelsFont(), | ||||
| truncatedText).width()); | ||||
| labelItem->setHtml(truncatedText); | ||||
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Titta Heikkala
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r2604 | } | ||
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r2412 | |||
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r2133 | //label transformation origin point | ||
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r2131 | const QRectF &rect = labelItem->boundingRect(); | ||
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r2111 | QPointF center = rect.center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
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r2540 | qreal widthDiff = rect.width() - boundingRect.width(); | ||
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r2570 | qreal heightDiff = rect.height() - boundingRect.height(); | ||
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r2111 | |||
| //ticks and label position | ||||
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Miikka Heikkinen
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r2483 | if (axis()->alignment() == Qt::AlignLeft) { | ||
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Miikka Heikkinen
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r2540 | labelItem->setPos(axisRect.right() - rect.width() + (widthDiff / 2.0) - labelPadding(), layout[i] - center.y()); | ||
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Jani Honkonen
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r2131 | tickItem->setLine(axisRect.right() - labelPadding(), layout[i], axisRect.right(), layout[i]); | ||
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Miikka Heikkinen
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r2483 | } else if (axis()->alignment() == Qt::AlignRight) { | ||
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Miikka Heikkinen
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r2540 | labelItem->setPos(axisRect.left() + labelPadding() - (widthDiff / 2.0), layout[i] - center.y()); | ||
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Jani Honkonen
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r2131 | tickItem->setLine(axisRect.left(), layout[i], axisRect.left() + labelPadding(), layout[i]); | ||
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Michal Klocek
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r2111 | } | ||
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r2133 | |||
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r2446 | //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() | ||||
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Titta Heikkala
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r2760 | && (lowerBound == gridRect.bottom() || upperBound == gridRect.top())) { | ||
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r2446 | forceHide = true; | ||
| } else { | ||||
| labelItem->setPos(labelItem->pos().x() , lowerBound - (delta / 2.0) - center.y()); | ||||
| } | ||||
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Michal Klocek
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r2111 | } | ||
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Miikka Heikkinen
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r2445 | //label overlap detection - compensate one pixel for rounding errors | ||
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r2651 | if (labelItem->pos().y() + boundingRect.height() > height || forceHide || | ||
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r2570 | (labelItem->pos().y() + (heightDiff / 2.0) - 1.0) > axisRect.bottom() || | ||
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r2651 | labelItem->pos().y() + (heightDiff / 2.0) < (axisRect.top() - 1.0)) { | ||
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r2111 | labelItem->setVisible(false); | ||
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r2133 | } | ||
| else { | ||||
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r2111 | labelItem->setVisible(true); | ||
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r2133 | height=labelItem->pos().y(); | ||
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r2111 | } | ||
| //shades | ||||
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r2721 | QGraphicsRectItem *shadeItem = 0; | ||
| if (i == 0) | ||||
| shadeItem = static_cast<QGraphicsRectItem *>(shades.at(0)); | ||||
| else if (i % 2) | ||||
| shadeItem = static_cast<QGraphicsRectItem *>(shades.at((i / 2) + 1)); | ||||
| if (shadeItem) { | ||||
| qreal lowerBound; | ||||
| qreal upperBound; | ||||
| if (i == 0) { | ||||
| lowerBound = gridRect.bottom(); | ||||
| upperBound = layout[0]; | ||||
| } else { | ||||
| lowerBound = layout[i]; | ||||
| if (i == layout.size() - 1) | ||||
| upperBound = gridRect.top(); | ||||
| else | ||||
| upperBound = qMax(layout[i + 1], gridRect.top()); | ||||
| } | ||||
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Titta Heikkala
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r2760 | if (lowerBound > gridRect.bottom()) | ||
| lowerBound = gridRect.bottom(); | ||||
| if (upperBound < gridRect.top()) | ||||
| upperBound = gridRect.top(); | ||||
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r2721 | shadeItem->setRect(gridRect.left(), upperBound, gridRect.width(), | ||
| lowerBound - upperBound); | ||||
| if (shadeItem->rect().height() <= 0.0) | ||||
| shadeItem->setVisible(false); | ||||
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r2448 | else | ||
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r2721 | shadeItem->setVisible(true); | ||
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r2111 | } | ||
| // check if the grid line and the axis tick should be shown | ||||
| qreal y = gridItem->line().p1().y(); | ||||
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r2133 | if ((y < gridRect.top() || y > gridRect.bottom())) | ||
| { | ||||
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r2111 | gridItem->setVisible(false); | ||
| tickItem->setVisible(false); | ||||
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r2133 | }else{ | ||
| gridItem->setVisible(true); | ||||
| tickItem->setVisible(true); | ||||
|
Michal Klocek
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r2111 | } | ||
| } | ||||
| //begin/end grid line in case labels between | ||||
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Jani Honkonen
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r2131 | if (intervalAxis()) { | ||
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Michal Klocek
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r2111 | QGraphicsLineItem *gridLine; | ||
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r2131 | gridLine = static_cast<QGraphicsLineItem *>(lines.at(layout.size())); | ||
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r2111 | gridLine->setLine(gridRect.left(), gridRect.top(), gridRect.right(), gridRect.top()); | ||
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Michal Klocek
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r2133 | gridLine->setVisible(true); | ||
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r2483 | gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size() + 1)); | ||
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r2111 | gridLine->setLine(gridRect.left(), gridRect.bottom(), gridRect.right(), gridRect.bottom()); | ||
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r2133 | gridLine->setVisible(true); | ||
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r2111 | } | ||
| } | ||||
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r2138 | QSizeF VerticalAxis::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
| { | ||||
| Q_UNUSED(constraint); | ||||
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r2483 | QSizeF sh(0, 0); | ||
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r2138 | |||
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r2483 | if (axis()->titleText().isEmpty() || !titleItem()->isVisible()) | ||
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r2138 | return sh; | ||
| switch (which) { | ||||
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r2530 | case Qt::MinimumSize: { | ||
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Titta Heikkala
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r2712 | QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(), | ||
| QStringLiteral("...")); | ||||
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r2540 | sh = QSizeF(titleRect.height() + (titlePadding() * 2.0), titleRect.width()); | ||
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r2138 | break; | ||
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r2530 | } | ||
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r2138 | case Qt::MaximumSize: | ||
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r2530 | case Qt::PreferredSize: { | ||
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r2539 | QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(), axis()->titleText()); | ||
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r2540 | sh = QSizeF(titleRect.height() + (titlePadding() * 2.0), titleRect.width()); | ||
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r2138 | break; | ||
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r2530 | } | ||
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r2138 | default: | ||
| break; | ||||
| } | ||||
| return sh; | ||||
| } | ||||
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Titta Heikkala
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r2712 | QT_CHARTS_END_NAMESPACE | ||