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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the 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 The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <private/cartesianchartlayout_p.h>
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#include <private/chartpresenter_p.h>
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#include <private/chartaxiselement_p.h>
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#include <QtCore/QDebug>
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QT_CHARTS_BEGIN_NAMESPACE
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static const qreal maxAxisPortion = 0.4;
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CartesianChartLayout::CartesianChartLayout(ChartPresenter *presenter)
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: AbstractChartLayout(presenter)
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{
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}
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CartesianChartLayout::~CartesianChartLayout()
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{
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}
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QRectF CartesianChartLayout::calculateAxisGeometry(const QRectF &geometry, const QList<ChartAxisElement *> &axes) const
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{
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QSizeF left(0,0);
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QSizeF minLeft(0,0);
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QSizeF right(0,0);
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QSizeF minRight(0,0);
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QSizeF bottom(0,0);
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QSizeF minBottom(0,0);
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QSizeF top(0,0);
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QSizeF minTop(0,0);
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QSizeF labelExtents(0,0);
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int leftCount = 0;
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int rightCount = 0;
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int topCount = 0;
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int bottomCount = 0;
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foreach (ChartAxisElement *axis , axes) {
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if (!axis->isVisible())
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continue;
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QSizeF size = axis->effectiveSizeHint(Qt::PreferredSize);
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//this is used to get single thick font size
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QSizeF minSize = axis->effectiveSizeHint(Qt::MinimumSize);
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switch (axis->axis()->alignment()) {
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case Qt::AlignLeft:
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left.setWidth(left.width()+size.width());
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left.setHeight(qMax(left.height(),size.height()));
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minLeft.setWidth(minLeft.width()+minSize.width());
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minLeft.setHeight(qMax(minLeft.height(),minSize.height()));
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labelExtents.setHeight(qMax(size.height(), labelExtents.height()));
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leftCount++;
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break;
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case Qt::AlignRight:
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right.setWidth(right.width()+size.width());
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right.setHeight(qMax(right.height(),size.height()));
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minRight.setWidth(minRight.width()+minSize.width());
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minRight.setHeight(qMax(minRight.height(),minSize.height()));
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labelExtents.setHeight(qMax(size.height(), labelExtents.height()));
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rightCount++;
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break;
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case Qt::AlignTop:
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top.setWidth(qMax(top.width(),size.width()));
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top.setHeight(top.height()+size.height());
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minTop.setWidth(qMax(minTop.width(),minSize.width()));
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minTop.setHeight(minTop.height()+minSize.height());
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labelExtents.setWidth(qMax(size.width(), labelExtents.width()));
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topCount++;
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break;
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case Qt::AlignBottom:
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bottom.setWidth(qMax(bottom.width(), size.width()));
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bottom.setHeight(bottom.height() + size.height());
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minBottom.setWidth(qMax(minBottom.width(),minSize.width()));
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minBottom.setHeight(minBottom.height() + minSize.height());
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labelExtents.setWidth(qMax(size.width(), labelExtents.width()));
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bottomCount++;
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break;
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default:
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qWarning()<<"Axis is without alignment !";
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break;
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}
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}
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qreal totalVerticalAxes = leftCount + rightCount;
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qreal leftSqueezeRatio = 1.0;
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qreal rightSqueezeRatio = 1.0;
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qreal vratio = 0;
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if (totalVerticalAxes > 0)
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vratio = (maxAxisPortion * geometry.width()) / totalVerticalAxes;
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if (leftCount > 0) {
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int maxWidth = vratio * leftCount;
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if (left.width() > maxWidth) {
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leftSqueezeRatio = maxWidth / left.width();
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left.setWidth(maxWidth);
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}
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}
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if (rightCount > 0) {
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int maxWidth = vratio * rightCount;
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if (right.width() > maxWidth) {
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rightSqueezeRatio = maxWidth / right.width();
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right.setWidth(maxWidth);
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}
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}
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qreal totalHorizontalAxes = topCount + bottomCount;
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qreal topSqueezeRatio = 1.0;
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qreal bottomSqueezeRatio = 1.0;
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qreal hratio = 0;
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if (totalHorizontalAxes > 0)
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hratio = (maxAxisPortion * geometry.height()) / totalHorizontalAxes;
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if (topCount > 0) {
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int maxHeight = hratio * topCount;
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if (top.height() > maxHeight) {
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topSqueezeRatio = maxHeight / top.height();
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top.setHeight(maxHeight);
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}
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}
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if (bottomCount > 0) {
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int maxHeight = hratio * bottomCount;
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if (bottom.height() > maxHeight) {
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bottomSqueezeRatio = maxHeight / bottom.height();
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bottom.setHeight(maxHeight);
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}
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}
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qreal minHeight = qMax(minLeft.height(),minRight.height()) + 1;
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qreal minWidth = qMax(minTop.width(),minBottom.width()) + 1;
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// Ensure that there is enough space for first and last tick labels.
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left.setWidth(qMax(labelExtents.width(), left.width()));
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right.setWidth(qMax(labelExtents.width(), right.width()));
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top.setHeight(qMax(labelExtents.height(), top.height()));
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bottom.setHeight(qMax(labelExtents.height(), bottom.height()));
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QRectF chartRect = geometry.adjusted(qMax(left.width(),minWidth/2), qMax(top.height(), minHeight/2),-qMax(right.width(),minWidth/2),-qMax(bottom.height(),minHeight/2));
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qreal leftOffset = 0;
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qreal rightOffset = 0;
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qreal topOffset = 0;
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qreal bottomOffset = 0;
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foreach (ChartAxisElement *axis , axes) {
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if (!axis->isVisible())
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continue;
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QSizeF size = axis->effectiveSizeHint(Qt::PreferredSize);
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switch (axis->axis()->alignment()){
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case Qt::AlignLeft:{
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qreal width = size.width();
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if (leftSqueezeRatio < 1.0)
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width *= leftSqueezeRatio;
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leftOffset+=width;
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axis->setGeometry(QRect(chartRect.left()-leftOffset, geometry.top(),width, geometry.bottom()),chartRect);
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break;
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}
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case Qt::AlignRight:{
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qreal width = size.width();
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if (rightSqueezeRatio < 1.0)
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width *= rightSqueezeRatio;
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axis->setGeometry(QRect(chartRect.right()+rightOffset,geometry.top(),width,geometry.bottom()),chartRect);
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rightOffset+=width;
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break;
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}
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case Qt::AlignTop: {
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qreal height = size.height();
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if (topSqueezeRatio < 1.0)
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height *= topSqueezeRatio;
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axis->setGeometry(QRect(geometry.left(), chartRect.top() - topOffset - height, geometry.width(), height), chartRect);
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topOffset += height;
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break;
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}
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case Qt::AlignBottom:
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qreal height = size.height();
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if (bottomSqueezeRatio < 1.0)
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height *= bottomSqueezeRatio;
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axis->setGeometry(QRect(geometry.left(), chartRect.bottom() + bottomOffset, geometry.width(), height), chartRect);
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bottomOffset += height;
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break;
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}
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}
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return chartRect;
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}
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QRectF CartesianChartLayout::calculateAxisMinimum(const QRectF &minimum, const QList<ChartAxisElement *> &axes) const
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{
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QSizeF left;
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QSizeF right;
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QSizeF bottom;
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QSizeF top;
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foreach (ChartAxisElement *axis, axes) {
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QSizeF size = axis->effectiveSizeHint(Qt::MinimumSize);
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if (!axis->isVisible())
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continue;
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switch (axis->axis()->alignment()) {
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case Qt::AlignLeft:
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left.setWidth(left.width() + size.width());
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left.setHeight(qMax(left.height() * 2, size.height()));
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break;
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case Qt::AlignRight:
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right.setWidth(right.width() + size.width());
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right.setHeight(qMax(right.height() * 2, size.height()));
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break;
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case Qt::AlignTop:
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top.setWidth(qMax(top.width(), size.width()));
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top.setHeight(top.height() + size.height());
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break;
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case Qt::AlignBottom:
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bottom.setWidth(qMax(bottom.width(), size.width()));
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bottom.setHeight(bottom.height() + size.height());
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break;
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}
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}
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return minimum.adjusted(0, 0, left.width() + right.width() + qMax(top.width(), bottom.width()), top.height() + bottom.height() + qMax(left.height(), right.height()));
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}
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QT_CHARTS_END_NAMESPACE
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