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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 "chartcategoryaxisx_p.h"
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#include "qcategoryaxis.h"
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#include "qabstractaxis.h"
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#include "chartpresenter_p.h"
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#include <QGraphicsLayout>
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#include <QFontMetrics>
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#include <qmath.h>
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static int label_padding = 5;
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ChartCategoryAxisX::ChartCategoryAxisX(QAbstractAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter)
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{
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}
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ChartCategoryAxisX::~ChartCategoryAxisX()
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{
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}
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QVector<qreal> ChartCategoryAxisX::calculateLayout() const
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{
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QCategoryAxis *axis = qobject_cast<QCategoryAxis *>(m_chartAxis);
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int tickCount = axis->categoriesLabels().count() + 1;
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QVector<qreal> points;
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if (tickCount < 2)
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return points;
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qreal range = axis->max() - axis->min();
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if (range > 0) {
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points.resize(tickCount);
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qreal scale = m_rect.width() / range;
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for (int i = 0; i < tickCount; ++i)
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if (i < tickCount - 1) {
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int x = (axis->startValue(axis->categoriesLabels().at(i)) - axis->min()) * scale + m_rect.left();
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points[i] = x;
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} else {
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int x = (axis->endValue(axis->categoriesLabels().at(i - 1)) - axis->min()) * scale + m_rect.left();
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points[i] = x;
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}
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}
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return points;
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}
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void ChartCategoryAxisX::updateGeometry()
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{
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const QVector<qreal>& layout = ChartAxis::layout();
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m_minWidth = 0;
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m_minHeight = 0;
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if(layout.isEmpty()) return;
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QCategoryAxis *categoryAxis = qobject_cast<QCategoryAxis *>(m_chartAxis);
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QStringList ticksList = categoryAxis->categoriesLabels();
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QList<QGraphicsItem *> lines = m_grid->childItems();
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QList<QGraphicsItem *> labels = m_labels->childItems();
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QList<QGraphicsItem *> shades = m_shades->childItems();
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QList<QGraphicsItem *> axis = m_arrow->childItems();
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for (int i = 0; i < labels.count(); i++) {
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labels.at(i)->setVisible(false);
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}
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// axis base line
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0));
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lineItem->setLine(m_rect.left(), m_rect.bottom(), m_rect.right(), m_rect.bottom());
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for (int i = 0; i < layout.size(); ++i) {
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// label items
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QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i));
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if (i < ticksList.count()) {
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labelItem->setText(ticksList.at(i));
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}
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const QRectF& rect = labelItem->boundingRect();
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QPointF center = rect.center();
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labelItem->setTransformOriginPoint(center.x(), center.y());
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if (i < layout.size() - 1) {
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labelItem->setPos(layout[i] + (layout[i + 1] - layout[i]) / 2 - center.x(), m_rect.bottom() + label_padding);
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} else {
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labelItem->setPos(layout[i] - center.x(), m_rect.bottom() + label_padding);
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}
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// check if the label should be shown
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if (labelItem->pos().x() + center.x() < m_rect.left() || labelItem->pos().x() + center.x() > m_rect.right())
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labelItem->setVisible(false);
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else
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labelItem->setVisible(true);
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m_minWidth += rect.width();
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m_minHeight = qMax(rect.height()+ label_padding, m_minHeight);
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if ((i + 1) % 2 && i > 1) {
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QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i / 2 - 1));
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rectItem->setRect(layout[i - 1],m_rect.top(),layout[i]-layout[i - 1],m_rect.height());
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}
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// grid lines and axis line ticks
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i));
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lineItem->setPos(layout[i], m_rect.top());
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lineItem->setLine(0, 0, 0, m_rect.height());
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QGraphicsLineItem *tickLineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1));
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tickLineItem->setPos(layout[i], m_rect.bottom());
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tickLineItem->setLine(0, 0, 0, 5);
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// check if the grid line and the axis tick should be shown
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if (lineItem->pos().x() < m_rect.left() || lineItem->pos().x() > m_rect.right()) {
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lineItem->setVisible(false);
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tickLineItem->setVisible(false);
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} else {
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lineItem->setVisible(true);
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tickLineItem->setVisible(true);
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}
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}
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}
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void ChartCategoryAxisX::handleAxisUpdated()
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{
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updateGeometry();
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ChartAxis::handleAxisUpdated();
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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