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/****************************************************************************
**
** 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 "verticalaxis_p.h"
#include "qabstractaxis.h"
#include <QFontMetrics>
#include <QDebug>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
VerticalAxis::VerticalAxis(QAbstractAxis *axis, QGraphicsItem* item, bool intervalAxis)
: ChartAxis(axis, item, intervalAxis)
{
}
VerticalAxis::~VerticalAxis()
{
}
void VerticalAxis::updateGeometry()
{
const QVector<qreal> &layout = ChartAxis::layout();
if (layout.isEmpty())
return;
QStringList labelList = labels();
QList<QGraphicsItem *> lines = lineItems();
QList<QGraphicsItem *> labels = labelItems();
QList<QGraphicsItem *> shades = shadeItems();
QList<QGraphicsItem *> axis = arrowItems();
QGraphicsSimpleTextItem* 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*>(axis.at(0));
//arrow position
if (alignment()==Qt::AlignLeft)
arrowItem->setLine( axisRect.right() , gridRect.top(), axisRect.right(), gridRect.bottom());
else if(alignment()==Qt::AlignRight)
arrowItem->setLine( axisRect.left() , gridRect.top(), axisRect.left(), gridRect.bottom());
QFontMetrics fn(font());
//title
int titlePad = 0;
QRectF titleBoundingRect;
if (!titleText().isEmpty() && titleItem()->isVisible()) {
QFontMetrics fn(title->font());
int size(0);
size = gridRect.height();
QString titleText = this->titleText();
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 (alignment() == Qt::AlignLeft) {
title->setPos(axisRect.left() - titleBoundingRect.width() / 2 + titleBoundingRect.height() / 2 + titlePad, center.y());
}
else if (alignment() == Qt::AlignRight) {
title->setPos(axisRect.right() - titleBoundingRect.width() / 2 - titleBoundingRect.height() / 2 - titlePad, center.y());
}
title->setTransformOriginPoint(titleBoundingRect.center());
title->setRotation(270);
}
for (int i = 0; i < layout.size(); ++i) {
//items
QGraphicsLineItem *gridItem = static_cast<QGraphicsLineItem *>(lines.at(i));
QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem *>(axis.at(i + 1));
QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem *>(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 = labelBoundingRect(fn, text);
qreal size = axisRect.right() - axisRect.left() - labelPadding() - titleBoundingRect.height() - (titlePad * 2);
if (boundingRect.width() > size) {
QString label = text + "...";
while (boundingRect.width() > 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 widthDiff = rect.width() - boundingRect.width();
//ticks and label position
if (alignment() == Qt::AlignLeft) {
labelItem->setPos(axisRect.right() - rect.width() + (widthDiff / 2) - labelPadding(), layout[i] - center.y());
tickItem->setLine(axisRect.right() - labelPadding(), layout[i], axisRect.right(), layout[i]);
} else if (alignment() == Qt::AlignRight) {
labelItem->setPos(axisRect.left() + labelPadding() - (widthDiff / 2), 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())) {
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() + (boundingRect.height() / 2.0) - 1.0) > axisRect.bottom() ||
labelItem->pos().y() + (boundingRect.height() / 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);
QFontMetrics fn(titleFont());
QSizeF sh(0,0);
if (titleText().isEmpty() || !titleItem()->isVisible())
return sh;
switch (which) {
case Qt::MinimumSize:
sh = QSizeF(fn.height() + (titlePadding() * 2), fn.boundingRect("...").width());
break;
case Qt::MaximumSize:
case Qt::PreferredSize:
sh = QSizeF(fn.height() + (titlePadding() * 2), fn.boundingRect(axis()->titleText()).width());
break;
default:
break;
}
return sh;
}
QTCOMMERCIALCHART_END_NAMESPACE
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