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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "chartbarcategoryaxisx_p.h"
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#include "chartpresenter_p.h"
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#include "qbarcategoryaxis_p.h"
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#include "chartlayout_p.h"
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#include <QFontMetrics>
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#include <QDebug>
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#include <qmath.h>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ChartBarCategoryAxisX::ChartBarCategoryAxisX(QBarCategoryAxis *axis, QGraphicsItem* item)
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: HorizontalAxis(axis, item, true),
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m_categoriesAxis(axis)
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{
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QObject::connect(m_categoriesAxis,SIGNAL(categoriesChanged()),this, SLOT(handleCategoriesChanged()));
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handleCategoriesChanged();
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}
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ChartBarCategoryAxisX::~ChartBarCategoryAxisX()
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{
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}
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QVector<qreal> ChartBarCategoryAxisX::calculateLayout() const
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{
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QVector<qreal> points;
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const QRectF& gridRect = gridGeometry();
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qreal range = max() - min();
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const qreal delta = gridRect.width()/range;
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if(delta<2) return points;
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qreal offset =-min()-0.5;
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offset = int(offset * delta)%int(delta);
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int count = qFloor(range);
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if(count < 1 ) return points;
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points.resize(count+2);
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for (int i = 0; i < count+2; ++i) {
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points[i] = offset + i * delta + gridRect.left();
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}
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return points;
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}
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QStringList ChartBarCategoryAxisX::createCategoryLabels(const QVector<qreal>& layout) const
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{
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QStringList result ;
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const QRectF &gridRect = gridGeometry();
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qreal d = (max() - min()) / gridRect.width();
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for (int i = 0; i < layout.count() - 1; ++i) {
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qreal x = qFloor((((layout[i] + layout[i + 1]) / 2 - gridRect.left()) * d + min() + 0.5));
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if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) {
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result << m_categoriesAxis->categories().at(x);
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} else {
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// No label for x coordinate
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result << "";
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}
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}
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result << "";
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return result;
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}
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void ChartBarCategoryAxisX::updateGeometry()
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{
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const QVector<qreal>& layout = ChartAxis::layout();
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if (layout.isEmpty())
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return;
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setLabels(createCategoryLabels(layout));
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HorizontalAxis::updateGeometry();
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}
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void ChartBarCategoryAxisX::handleCategoriesChanged()
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{
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QGraphicsLayoutItem::updateGeometry();
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if(presenter()) presenter()->layout()->invalidate();
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}
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QSizeF ChartBarCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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Q_UNUSED(constraint)
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QFontMetrics fn(font());
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QSizeF sh;
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QSizeF base = HorizontalAxis::sizeHint(which, constraint);
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QStringList ticksList = m_categoriesAxis->categories();
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qreal width=0;
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qreal height=0;
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switch (which) {
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case Qt::MinimumSize: {
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QRectF boundingRect = labelBoundingRect(fn, "...");
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width = qMax(boundingRect.width(), base.width());
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height = boundingRect.height() + labelPadding();
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height += base.height();
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sh = QSizeF(width, height);
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break;
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}
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case Qt::PreferredSize:{
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int labelHeight = 0;
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foreach (const QString& s, ticksList) {
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QRect rect = labelBoundingRect(fn, s);
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labelHeight = qMax(rect.height(), labelHeight);
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width += rect.width();
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}
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height = labelHeight + labelPadding();
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height += base.height();
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width = qMax(width, base.width());
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sh = QSizeF(width, height);
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break;
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}
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default:
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break;
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}
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return sh;
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}
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#include "moc_chartbarcategoryaxisx_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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