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/****************************************************************************
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**
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** Copyright (C) 2013 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 "chartlayout_p.h"
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#include "chartpresenter_p.h"
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#include "qlegend_p.h"
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#include "chartaxis_p.h"
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#include "charttitle_p.h"
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#include "chartbackground_p.h"
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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static const qreal maxAxisPortion = 0.4;
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ChartLayout::ChartLayout(ChartPresenter *presenter)
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: m_presenter(presenter),
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m_margins(20, 20, 20, 20),
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m_minChartRect(0, 0, 200, 200)
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{
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}
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ChartLayout::~ChartLayout()
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{
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}
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void ChartLayout::setGeometry(const QRectF &rect)
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{
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if (!rect.isValid())
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return;
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QList<ChartAxis *> axes = m_presenter->axisItems();
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ChartTitle *title = m_presenter->titleElement();
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QLegend *legend = m_presenter->legend();
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ChartBackground *background = m_presenter->backgroundElement();
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QRectF contentGeometry = calculateBackgroundGeometry(rect, background);
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contentGeometry = calculateContentGeometry(contentGeometry);
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if (title && title->isVisible())
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contentGeometry = calculateTitleGeometry(contentGeometry, title);
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if (legend->isAttachedToChart() && legend->isVisible())
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contentGeometry = calculateLegendGeometry(contentGeometry, legend);
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contentGeometry = calculateAxisGeometry(contentGeometry, axes);
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m_presenter->setGeometry(contentGeometry);
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QGraphicsLayout::setGeometry(rect);
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}
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QRectF ChartLayout::calculateContentGeometry(const QRectF &geometry) const
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{
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return geometry.adjusted(m_margins.left(), m_margins.top(), -m_margins.right(), -m_margins.bottom());
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}
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QRectF ChartLayout::calculateContentMinimum(const QRectF &minimum) const
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{
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return minimum.adjusted(0, 0, m_margins.left() + m_margins.right(), m_margins.top() + m_margins.bottom());
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}
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QRectF ChartLayout::calculateBackgroundGeometry(const QRectF &geometry, ChartBackground *background) const
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{
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qreal left, top, right, bottom;
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getContentsMargins(&left, &top, &right, &bottom);
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QRectF backgroundGeometry = geometry.adjusted(left, top, -right, -bottom);
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if (background)
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background->setRect(backgroundGeometry);
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return backgroundGeometry;
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}
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QRectF ChartLayout::calculateBackgroundMinimum(const QRectF &minimum) const
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{
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qreal left, top, right, bottom;
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getContentsMargins(&left, &top, &right, &bottom);
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return minimum.adjusted(0, 0, left + right, top + bottom);
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}
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QRectF ChartLayout::calculateAxisGeometry(const QRectF &geometry, const QList<ChartAxis *>& 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 (ChartAxis *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->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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int 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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int 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(ChartElement *axisElement , axes) {
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ChartAxis* axis = qobject_cast<ChartAxis*>(axisElement);
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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->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 ChartLayout::calculateAxisMinimum(const QRectF &minimum, const QList<ChartAxis *>& 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 (ChartAxis *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->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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QRectF ChartLayout::calculateLegendGeometry(const QRectF &geometry, QLegend *legend) const
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{
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QSizeF size = legend->effectiveSizeHint(Qt::PreferredSize, QSizeF(-1, -1));
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QRectF legendRect;
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QRectF result;
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switch (legend->alignment()) {
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case Qt::AlignTop: {
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legendRect = QRectF(geometry.topLeft(), QSizeF(geometry.width(), size.height()));
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result = geometry.adjusted(0, legendRect.height(), 0, 0);
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break;
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}
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case Qt::AlignBottom: {
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legendRect = QRectF(QPointF(geometry.left(), geometry.bottom() - size.height()), QSizeF(geometry.width(), size.height()));
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result = geometry.adjusted(0, 0, 0, -legendRect.height());
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break;
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}
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case Qt::AlignLeft: {
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qreal width = qMin(size.width(), geometry.width() * maxAxisPortion);
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legendRect = QRectF(geometry.topLeft(), QSizeF(width, geometry.height()));
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result = geometry.adjusted(width, 0, 0, 0);
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break;
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}
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case Qt::AlignRight: {
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qreal width = qMin(size.width(), geometry.width() * maxAxisPortion);
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legendRect = QRectF(QPointF(geometry.right() - width, geometry.top()), QSizeF(width, geometry.height()));
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result = geometry.adjusted(0, 0, -width, 0);
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break;
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}
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default: {
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legendRect = QRectF(0, 0, 0, 0);
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result = geometry;
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break;
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}
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}
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legend->setGeometry(legendRect);
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return result;
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}
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QRectF ChartLayout::calculateLegendMinimum(const QRectF &geometry, QLegend *legend) const
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{
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QSizeF minSize = legend->effectiveSizeHint(Qt::MinimumSize, QSizeF(-1, -1));
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return geometry.adjusted(0, 0, minSize.width(), minSize.height());
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}
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QRectF ChartLayout::calculateTitleGeometry(const QRectF &geometry, ChartTitle *title) const
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{
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title->setGeometry(geometry);
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QPointF center = geometry.center() - title->boundingRect().center();
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title->setPos(center.x(),title->pos().y());
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return geometry.adjusted(0,title->boundingRect().height()+1,0,0);
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}
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QRectF ChartLayout::calculateTitleMinimum(const QRectF &minimum, ChartTitle *title) const
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{
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QSizeF min = title->sizeHint(Qt::MinimumSize);
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return minimum.adjusted(0, 0, min.width(), min.height());
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}
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QSizeF ChartLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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Q_UNUSED(constraint);
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if (which == Qt::MinimumSize) {
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QList<ChartAxis *> axes = m_presenter->axisItems();
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ChartTitle *title = m_presenter->titleElement();
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QLegend *legend = m_presenter->legend();
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QRectF minimumRect(0, 0, 0, 0);
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minimumRect = calculateBackgroundMinimum(minimumRect);
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minimumRect = calculateContentMinimum(minimumRect);
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minimumRect = calculateTitleMinimum(minimumRect, title);
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minimumRect = calculateLegendMinimum(minimumRect, legend);
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minimumRect = calculateAxisMinimum(minimumRect, axes);
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return minimumRect.united(m_minChartRect).size().toSize();
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}
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return QSize(-1, -1);
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}
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void ChartLayout::setMargins(const QMargins &margins)
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{
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if (m_margins != margins) {
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m_margins = margins;
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updateGeometry();
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}
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}
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QMargins ChartLayout::margins() const
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{
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return m_margins;
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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