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/*------------------------------------------------------------------------------
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-- This file is a part of the ColorMapChart API
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-- Copyright (C) 2016, Plasma Physics Laboratory - CNRS
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------*/
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/*-- Author : Hugo Winter
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-- Mail : hugo.winter@lpp.polytechnique.fr
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----------------------------------------------------------------------------*/
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#include "chartcolorbaraxisy_p.h"
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#include <QtCharts/QAbstractAxis>
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#include <private/chartpresenter_p.h>
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//#include <QtCharts/QColorBarAxis>
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#include "colorbaraxis/qcolorbaraxis.h"
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#include <private/abstractchartlayout_p.h>
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#include <QtWidgets/QGraphicsLayout>
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#include <QtCore/QtMath>
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#include <QtCore/QDebug>
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QT_CHARTS_BEGIN_NAMESPACE
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ChartColorBarAxisY::ChartColorBarAxisY(QColorBarAxis *axis, QPoint pos, qreal height, QLinearGradient gradient, QGraphicsItem *item)
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: VerticalAxis(axis, item),
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m_axis(axis),
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m_gradient(gradient),
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m_position(pos),
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m_height(height)
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{
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QObject::connect(m_axis, SIGNAL(tickCountChanged(int)), this, SLOT(handleTickCountChanged(int)));
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QObject::connect(m_axis, SIGNAL(minorTickCountChanged(int)),
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this, SLOT(handleMinorTickCountChanged(int)));
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QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
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createColorBar();
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}
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ChartColorBarAxisY::~ChartColorBarAxisY()
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{
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}
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QVector<qreal> ChartColorBarAxisY::calculateLayout() const
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{
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int tickCount = m_axis->tickCount();
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Q_ASSERT(tickCount >= 2);
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QVector<qreal> points;
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points.resize(tickCount);
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const QRectF &gridRect = gridGeometry();
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const qreal deltaY = gridRect.height() / (qreal(tickCount) - 1.0);
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for (int i = 0; i < tickCount; ++i)
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points[i] = qreal(i) * -deltaY + gridRect.bottom();
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return points;
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}
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void ChartColorBarAxisY::updateGeometry()
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{
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const QVector<qreal> &layout = ChartAxisElement::layout();
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if (layout.isEmpty())
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return;
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setLabels(createValueLabels(min(),max(),layout.size(),m_axis->labelFormat()));
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VerticalAxis::updateGeometry();
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}
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void ChartColorBarAxisY::handleTickCountChanged(int tick)
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{
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Q_UNUSED(tick);
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QGraphicsLayoutItem::updateGeometry();
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if (presenter()) presenter()->layout()->invalidate();
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}
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void ChartColorBarAxisY::handleMinorTickCountChanged(int tick)
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{
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Q_UNUSED(tick);
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QGraphicsLayoutItem::updateGeometry();
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if (presenter())
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presenter()->layout()->invalidate();
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}
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void ChartColorBarAxisY::handleLabelFormatChanged(const QString &format)
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{
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Q_UNUSED(format);
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QGraphicsLayoutItem::updateGeometry();
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if(presenter()) presenter()->layout()->invalidate();
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}
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QSizeF ChartColorBarAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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Q_UNUSED(constraint)
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QSizeF sh;
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QSizeF base = VerticalAxis::sizeHint(which, constraint);
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QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat());
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qreal width = 0;
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// Height of vertical axis sizeHint indicates the maximum distance labels can extend past
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// first and last ticks. Base height is irrelevant.
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qreal height = 0;
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switch (which)
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{
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case Qt::MinimumSize: {
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QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
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QStringLiteral("..."),
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axis()->labelsAngle());
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width = boundingRect.width() + labelPadding() + base.width() + 61.0; //TODO : hint changed 1.0 to 61.0
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height = boundingRect.height() / 2.0;
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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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qreal labelWidth = 0.0;
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qreal firstHeight = -1.0;
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foreach (const QString& s, ticksList) {
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QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
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labelWidth = qMax(rect.width(), labelWidth);
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height = rect.height();
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if (firstHeight < 0.0)
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firstHeight = height;
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}
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width = labelWidth + labelPadding() + base.width() + 62.0; //two pixels of tolerance //TODO : hint changed 2.0 to 62.0
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height = qMax(height, firstHeight) / 2.0;
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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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void ChartColorBarAxisY::createColorBar()
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{
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m_axis->setLabelsColor(QColor(0,0,255,0)); //make automatic labels disappear without changing layout (as it would be the case with setlabelVisible(false))
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//gradient
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QGradientStops stops = m_gradient.stops();
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QLinearGradient gradient(0,m_position.y(),1,m_height);
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foreach(QGradientStop stop, stops)
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{
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gradient.setColorAt(1-stop.first,stop.second);
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}
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//colorbar
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QRectF rect(m_position.x()+10,m_position.y(),m_height/20,m_height); //remove +10 if needed
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QGraphicsRectItem *colorbar = new QGraphicsRectItem(rect, this);
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colorbar->setZValue(ChartPresenter::AxisZValue);
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colorbar->setBrush(gradient);
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//colorbar labels
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for(int i=0;i<m_axis->tickCount();i++)
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{
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qreal value = m_axis->max() - (i * (m_axis->max() - m_axis->min()) / (m_axis->tickCount() - 1));
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QGraphicsTextItem *label = new QGraphicsTextItem(this);
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label->setPlainText(QString::number(value));
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label->setPos((m_position.x()+10+m_height/20+1),(m_position.y()*0.85+i*(m_height/(m_axis->tickCount()-1)))); //remove +10 if needed
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}
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}
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#include "moc_chartcolorbaraxisy_p.cpp"
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QT_CHARTS_END_NAMESPACE
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