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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 "chartbarcategoryaxisy_p.h"
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#include "chartpresenter_p.h"
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#include "qbarcategoryaxis_p.h"
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#include <qmath.h>
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#include <QFontMetrics>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ChartBarCategoryAxisY::ChartBarCategoryAxisY(QBarCategoryAxis *axis, ChartPresenter *presenter)
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: VerticalAxis(axis, presenter, true),
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m_categoriesAxis(axis)
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{
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}
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ChartBarCategoryAxisY::~ChartBarCategoryAxisY()
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{
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}
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QVector<qreal> ChartBarCategoryAxisY::calculateLayout() const
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{
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int count = m_categoriesAxis->d_ptr->count();
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Q_ASSERT(count >= 1);
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QVector<qreal> points;
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points.resize(count + 2);
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const QRectF &gridRect = gridGeometry();
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const qreal delta = gridRect.height() / (count);
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qreal offset = - min() - 0.5;
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if (delta < 1)
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return points;
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if (offset < 0)
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offset = int(offset * gridRect.height() / (max() - min())) % int(delta) + delta;
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else
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offset = int(offset * gridRect.height() / (max() - min())) % int(delta);
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for (int i = -1; i < count + 1; ++i) {
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int y = gridRect.bottom() - i * delta - offset;
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points[i + 1] = y;
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}
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return points;
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}
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QStringList ChartBarCategoryAxisY::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.height();
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for (int i = 0; i < layout.count() - 1; ++i) {
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qreal x = qFloor(((gridRect.height() - (layout[i + 1] + layout[i]) / 2 + gridRect.top()) * 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 ChartBarCategoryAxisY::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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VerticalAxis::updateGeometry();
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}
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void ChartBarCategoryAxisY::handleAxisUpdated()
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{
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if (m_categoriesAxis->categories() != m_categories) {
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m_categories = m_categoriesAxis->categories();
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if (ChartAxis::layout().count() == m_categoriesAxis->d_ptr->count() + 2)
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updateGeometry();
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}
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ChartAxis::handleAxisUpdated();
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}
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QSizeF ChartBarCategoryAxisY::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 = ChartAxis::sizeHint(which, constraint);
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QStringList ticksList = createCategoryLabels(ChartAxis::layout());
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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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width = fn.boundingRect("...").width() + labelPadding();
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height = fn.height();
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width += base.width();
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height = qMax(height, base.height());
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sh = QSizeF(width, height);
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break;
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case Qt::PreferredSize: {
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for (int i = 0; i < ticksList.size(); ++i) {
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QRectF rect = fn.boundingRect(ticksList.at(i));
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height += rect.height();
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width = qMax(rect.width() + labelPadding(), width);
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}
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height = qMax(height, base.height());
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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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QTCOMMERCIALCHART_END_NAMESPACE
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