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fix painting coordinates and added LGPL
fix painting coordinates and added LGPL

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verticalaxis.cpp
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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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** $QT_END_LICENSE$
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****************************************************************************/
#include <private/verticalaxis_p.h>
#include <QtCharts/QAbstractAxis>
#include <private/chartpresenter_p.h>
#include <QtCharts/QCategoryAxis>
#include <QtCore/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() && axis()->type() != QAbstractAxis::AxisTypeLogValue)
return;
QStringList labelList = labels();
QList<QGraphicsItem *> labels = labelItems();
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();
}
if (layout.isEmpty() && axis()->type() == QAbstractAxis::AxisTypeLogValue)
return;
QList<QGraphicsItem *> lines = gridItems();
QList<QGraphicsItem *> shades = shadeItems();
QList<QGraphicsItem *> minorLines = minorGridItems();
QList<QGraphicsItem *> minorArrows = minorArrowItems();
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
if (axis()->isReverse()) {
gridItem->setLine(gridRect.left(), gridRect.top() + gridRect.bottom() - layout[i],
gridRect.right(), gridRect.top() + gridRect.bottom() - layout[i]);
} else {
gridItem->setLine(gridRect.left(), layout[i], gridRect.right(), layout[i]);
}
//label text wrapping
QString text;
if (axis()->isReverse() && axis()->type() != QAbstractAxis::AxisTypeCategory)
text = labelList.at(labelList.count() - i - 1);
else
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
QPointF labelPos;
if (axis()->alignment() == Qt::AlignLeft) {
if (axis()->isReverse()) {
labelPos = QPointF(axisRect.right() - rect.width() + (widthDiff / 2.0)
- labelPadding(),
gridRect.top() + gridRect.bottom()
- layout[layout.size() - i - 1] - center.y());
tickItem->setLine(axisRect.right() - labelPadding(),
gridRect.top() + gridRect.bottom() - layout[i],
axisRect.right(),
gridRect.top() + gridRect.bottom() - layout[i]);
} else {
labelPos = QPointF(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) {
if (axis()->isReverse()) {
tickItem->setLine(axisRect.left(),
gridRect.top() + gridRect.bottom() - layout[i],
axisRect.left() + labelPadding(),
gridRect.top() + gridRect.bottom() - layout[i]);
labelPos = QPointF(axisRect.left() + labelPadding() - (widthDiff / 2.0),
gridRect.top() + gridRect.bottom()
- layout[layout.size() - i - 1] - center.y());
} else {
labelPos = QPointF(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;
bool labelOnValue = false;
if (intervalAxis() && (i + 1) != layout.size()) {
qreal lowerBound;
qreal upperBound;
if (axis()->isReverse()) {
lowerBound = qMax(gridRect.top() + gridRect.bottom() - layout[i + 1],
gridRect.top());
upperBound = qMin(gridRect.top() + gridRect.bottom() - layout[i],
gridRect.bottom());
} else {
lowerBound = qMin(layout[i], gridRect.bottom());
upperBound = qMax(layout[i + 1], gridRect.top());
}
const qreal delta = lowerBound - upperBound;
if (axis()->type() != QAbstractAxis::AxisTypeCategory) {
// 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())) {
forceHide = true;
} else {
labelPos.setY(lowerBound - (delta / 2.0) - center.y());
}
} else {
QCategoryAxis *categoryAxis = static_cast<QCategoryAxis *>(axis());
if (categoryAxis->labelsPosition() == QCategoryAxis::AxisLabelsPositionCenter) {
if (delta < boundingRect.height()
&& (lowerBound == gridRect.bottom() || upperBound == gridRect.top())) {
forceHide = true;
} else {
labelPos.setY(lowerBound - (delta / 2.0) - center.y());
}
} else if (categoryAxis->labelsPosition()
== QCategoryAxis::AxisLabelsPositionOnValue) {
labelOnValue = true;
if (axis()->isReverse()) {
labelPos.setY(gridRect.top() + gridRect.bottom()
- layout[i + 1] - center.y());
} else {
labelPos.setY(upperBound - center.y());
}
}
}
}
// Round to full pixel via QPoint to avoid one pixel clipping on the edge in some cases
labelItem->setPos(labelPos.toPoint());
//label overlap detection - compensate one pixel for rounding errors
if (axis()->isReverse()) {
if (forceHide)
labelItem->setVisible(false);
} else if (labelItem->pos().y() + boundingRect.height() > height || forceHide ||
((labelItem->pos().y() + (heightDiff / 2.0) - 1.0) > axisRect.bottom()
&& !labelOnValue) ||
(labelItem->pos().y() + (heightDiff / 2.0) < (axisRect.top() - 1.0) && !labelOnValue)) {
labelItem->setVisible(false);
}
else {
labelItem->setVisible(true);
height=labelItem->pos().y();
}
//shades
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) {
if (axis()->isReverse()) {
upperBound = gridRect.top();
lowerBound = gridRect.top() + gridRect.bottom() - layout[i];
} else {
lowerBound = gridRect.bottom();
upperBound = layout[0];
}
} else {
if (axis()->isReverse()) {
upperBound = gridRect.top() + gridRect.bottom() - layout[i];
if (i == layout.size() - 1) {
lowerBound = gridRect.bottom();
} else {
lowerBound = qMax(gridRect.top() + gridRect.bottom() - layout[i + 1],
gridRect.top());
}
} else {
lowerBound = layout[i];
if (i == layout.size() - 1)
upperBound = gridRect.top();
else
upperBound = qMax(layout[i + 1], gridRect.top());
}
}
if (lowerBound > gridRect.bottom())
lowerBound = gridRect.bottom();
if (upperBound < gridRect.top())
upperBound = gridRect.top();
shadeItem->setRect(gridRect.left(), upperBound, gridRect.width(),
lowerBound - upperBound);
if (shadeItem->rect().height() <= 0.0)
shadeItem->setVisible(false);
else
shadeItem->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);
}
// add minor ticks
QValueAxis *valueAxis = qobject_cast<QValueAxis *>(axis());
if ((i + 1) != layout.size() && valueAxis) {
int minorTickCount = valueAxis->minorTickCount();
if (minorTickCount != 0) {
qreal minorTickDistance = (layout[i] - layout[i + 1]) / qreal(minorTickCount + 1);
if (axis()->isReverse())
minorTickDistance = -minorTickDistance;
for (int j = 0; j < minorTickCount; j++) {
QGraphicsLineItem *minorGridItem =
static_cast<QGraphicsLineItem *>(minorLines.at(i * minorTickCount + j));
QGraphicsLineItem *minorArrowItem =
static_cast<QGraphicsLineItem *>(minorArrows.at(i * minorTickCount + j));
minorGridItem->setLine(gridRect.left(),
gridItem->line().p1().y()
- minorTickDistance * qreal(j + 1),
gridRect.right(),
gridItem->line().p1().y()
- minorTickDistance * qreal(j + 1));
if (axis()->alignment() == Qt::AlignLeft) {
minorArrowItem->setLine(gridRect.left() - labelPadding() / 2,
minorGridItem->line().p1().y(),
gridRect.left(),
minorGridItem->line().p1().y());
} else if (axis()->alignment() == Qt::AlignRight){
minorArrowItem->setLine(gridRect.right(),
minorGridItem->line().p1().y(),
gridRect.right() + labelPadding() / 2,
minorGridItem->line().p1().y());
}
// check if the minor grid line and the axis tick should be shown
qreal minorYPos = minorGridItem->line().p1().y();
if (minorYPos < gridRect.top() || minorYPos > gridRect.bottom()) {
minorGridItem->setVisible(false);
minorArrowItem->setVisible(false);
} else {
minorGridItem->setVisible(true);
minorArrowItem->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