|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2013 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 Commercial Charts Add-on.
|
|
|
**
|
|
|
** $QT_BEGIN_LICENSE$
|
|
|
** Licensees holding valid Qt Commercial licenses may use this file in
|
|
|
** accordance with the Qt Commercial 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 "horizontalaxis_p.h"
|
|
|
#include "qabstractaxis_p.h"
|
|
|
#include <QFontMetrics>
|
|
|
#include <qmath.h>
|
|
|
#include <QDebug>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
HorizontalAxis::HorizontalAxis(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis)
|
|
|
: CartesianChartAxis(axis, item, intervalAxis)
|
|
|
{
|
|
|
}
|
|
|
|
|
|
HorizontalAxis::~HorizontalAxis()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
void HorizontalAxis::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();
|
|
|
QGraphicsSimpleTextItem *title = titleItem();
|
|
|
|
|
|
Q_ASSERT(labels.size() == labelList.size());
|
|
|
Q_ASSERT(layout.size() == labelList.size());
|
|
|
|
|
|
const QRectF &axisRect = axisGeometry();
|
|
|
const QRectF &gridRect = gridGeometry();
|
|
|
|
|
|
//arrow
|
|
|
QGraphicsLineItem *arrowItem = static_cast<QGraphicsLineItem *>(arrow.at(0));
|
|
|
|
|
|
if (axis()->alignment() == Qt::AlignTop)
|
|
|
arrowItem->setLine(gridRect.left(), axisRect.bottom(), gridRect.right(), axisRect.bottom());
|
|
|
else if (axis()->alignment() == Qt::AlignBottom)
|
|
|
arrowItem->setLine(gridRect.left(), axisRect.top(), gridRect.right(), axisRect.top());
|
|
|
|
|
|
qreal width = 0;
|
|
|
QFontMetrics fn(axis()->labelsFont());
|
|
|
|
|
|
//title
|
|
|
int titlePad = 0;
|
|
|
QRectF titleBoundingRect;
|
|
|
QString titleText = axis()->titleText();
|
|
|
if (!titleText.isEmpty() && titleItem()->isVisible()) {
|
|
|
QFontMetrics fn(title->font());
|
|
|
int size(0);
|
|
|
size = gridRect.width();
|
|
|
|
|
|
if (fn.boundingRect(titleText).width() > size) {
|
|
|
QString string = titleText + "...";
|
|
|
while (fn.boundingRect(string).width() > size && string.length() > 3)
|
|
|
string.remove(string.length() - 4, 1);
|
|
|
title->setText(string);
|
|
|
} else {
|
|
|
title->setText(titleText);
|
|
|
}
|
|
|
|
|
|
titlePad = titlePadding();
|
|
|
titleBoundingRect = title->boundingRect();
|
|
|
|
|
|
QPointF center = gridRect.center() - titleBoundingRect.center();
|
|
|
if (axis()->alignment() == Qt::AlignTop) {
|
|
|
title->setPos(center.x(), axisRect.top() + titlePad);
|
|
|
} else if (axis()->alignment() == Qt::AlignBottom) {
|
|
|
title->setPos(center.x(), axisRect.bottom() - titleBoundingRect.height() - titlePad);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
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));
|
|
|
QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem *>(labels.at(i));
|
|
|
|
|
|
//grid line
|
|
|
gridItem->setLine(layout[i], gridRect.top(), layout[i], gridRect.bottom());
|
|
|
|
|
|
//label text wrapping
|
|
|
QString text = labelList.at(i);
|
|
|
QRectF boundingRect = labelBoundingRect(fn, text);
|
|
|
qreal size = axisRect.bottom() - axisRect.top() - labelPadding() - titleBoundingRect.height() - (titlePad * 2);
|
|
|
if (boundingRect.height() > size) {
|
|
|
QString label = text + "...";
|
|
|
while (boundingRect.height() >= size && label.length() > 3) {
|
|
|
label.remove(label.length() - 4, 1);
|
|
|
boundingRect = labelBoundingRect(fn, label);
|
|
|
}
|
|
|
labelItem->setText(label);
|
|
|
} else {
|
|
|
labelItem->setText(text);
|
|
|
}
|
|
|
|
|
|
//label transformation origin point
|
|
|
const QRectF& rect = labelItem->boundingRect();
|
|
|
QPointF center = rect.center();
|
|
|
labelItem->setTransformOriginPoint(center.x(), center.y());
|
|
|
int heightDiff = rect.height() - boundingRect.height();
|
|
|
|
|
|
//ticks and label position
|
|
|
if (axis()->alignment() == Qt::AlignTop) {
|
|
|
labelItem->setPos(layout[i] - center.x(), axisRect.bottom() - rect.height() + (heightDiff / 2) - labelPadding());
|
|
|
tickItem->setLine(layout[i], axisRect.bottom(), layout[i], axisRect.bottom() - labelPadding());
|
|
|
} else if (axis()->alignment() == Qt::AlignBottom) {
|
|
|
labelItem->setPos(layout[i] - center.x(), axisRect.top() - (heightDiff / 2) + labelPadding());
|
|
|
tickItem->setLine(layout[i], axisRect.top(), layout[i], axisRect.top() + labelPadding());
|
|
|
}
|
|
|
|
|
|
//label in between
|
|
|
bool forceHide = false;
|
|
|
if (intervalAxis() && (i + 1) != layout.size()) {
|
|
|
qreal leftBound = qMax(layout[i], gridRect.left());
|
|
|
qreal rightBound = qMin(layout[i + 1], gridRect.right());
|
|
|
const qreal delta = rightBound - leftBound;
|
|
|
// Hide label in case visible part of the category at the grid edge is too narrow
|
|
|
if (delta < boundingRect.width()
|
|
|
&& (leftBound == gridRect.left() || rightBound == gridRect.right())) {
|
|
|
forceHide = true;
|
|
|
} else {
|
|
|
labelItem->setPos(leftBound + (delta / 2.0) - center.x(), labelItem->pos().y());
|
|
|
}
|
|
|
}
|
|
|
|
|
|
//label overlap detection - compensate one pixel for rounding errors
|
|
|
if (labelItem->pos().x() < width || forceHide ||
|
|
|
labelItem->pos().x() < (axisRect.left() - 1.0) ||
|
|
|
(labelItem->pos().x() + boundingRect.width() - 1.0) > axisRect.right()){
|
|
|
labelItem->setVisible(false);
|
|
|
} else {
|
|
|
labelItem->setVisible(true);
|
|
|
width = boundingRect.width() + labelItem->pos().x();
|
|
|
}
|
|
|
|
|
|
//shades
|
|
|
if ((i + 1) % 2 && i > 1) {
|
|
|
QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem *>(shades.at(i / 2 - 1));
|
|
|
qreal leftBound = qMax(layout[i - 1], gridRect.left());
|
|
|
qreal rightBound = qMin(layout[i], gridRect.right());
|
|
|
rectItem->setRect(leftBound, gridRect.top(), rightBound - leftBound, gridRect.height());
|
|
|
if (rectItem->rect().width() <= 0.0)
|
|
|
rectItem->setVisible(false);
|
|
|
else
|
|
|
rectItem->setVisible(true);
|
|
|
}
|
|
|
|
|
|
// check if the grid line and the axis tick should be shown
|
|
|
qreal x = gridItem->line().p1().x();
|
|
|
if (x < gridRect.left() || x > gridRect.right()) {
|
|
|
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.right(), gridRect.top(), gridRect.right(), gridRect.bottom());
|
|
|
gridLine->setVisible(true);
|
|
|
gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size()+1));
|
|
|
gridLine->setLine(gridRect.left(), gridRect.top(), gridRect.left(), gridRect.bottom());
|
|
|
gridLine->setVisible(true);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
QSizeF HorizontalAxis::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(constraint);
|
|
|
QFontMetrics fn(axis()->titleFont());
|
|
|
QSizeF sh(0,0);
|
|
|
|
|
|
if (axis()->titleText().isEmpty() || !titleItem()->isVisible())
|
|
|
return sh;
|
|
|
|
|
|
switch (which) {
|
|
|
case Qt::MinimumSize:
|
|
|
sh = QSizeF(fn.boundingRect("...").width(), fn.height() + (titlePadding() * 2));
|
|
|
break;
|
|
|
case Qt::MaximumSize:
|
|
|
case Qt::PreferredSize:
|
|
|
sh = QSizeF(fn.boundingRect(axis()->titleText()).width(), fn.height() + (titlePadding() * 2));
|
|
|
break;
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
return sh;
|
|
|
}
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
