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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Enterprise Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/
#include <private/abstractchartlayout_p.h>
#include <private/chartpresenter_p.h>
#include <private/qlegend_p.h>
#include <private/chartaxiselement_p.h>
#include <private/charttitle_p.h>
#include <private/chartbackground_p.h>
#include <QtCore/QDebug>
QT_CHARTS_BEGIN_NAMESPACE
static const qreal golden_ratio = 0.4;
AbstractChartLayout::AbstractChartLayout(ChartPresenter *presenter)
: m_presenter(presenter),
m_margins(20, 20, 20, 20),
m_minChartRect(0, 0, 200, 200)
{
}
AbstractChartLayout::~AbstractChartLayout()
{
}
void AbstractChartLayout::setGeometry(const QRectF &rect)
{
if (!rect.isValid())
return;
if (m_presenter->chart()->isVisible()) {
QList<ChartAxisElement *> axes = m_presenter->axisItems();
ChartTitle *title = m_presenter->titleElement();
QLegend *legend = m_presenter->legend();
ChartBackground *background = m_presenter->backgroundElement();
QRectF contentGeometry = calculateBackgroundGeometry(rect, background);
contentGeometry = calculateContentGeometry(contentGeometry);
if (title && title->isVisible())
contentGeometry = calculateTitleGeometry(contentGeometry, title);
if (legend->isAttachedToChart() && legend->isVisible())
contentGeometry = calculateLegendGeometry(contentGeometry, legend);
contentGeometry = calculateAxisGeometry(contentGeometry, axes);
m_presenter->setGeometry(contentGeometry);
if (m_presenter->chart()->chartType() == QChart::ChartTypeCartesian)
static_cast<QGraphicsRectItem *>(m_presenter->plotAreaElement())->setRect(contentGeometry);
else
static_cast<QGraphicsEllipseItem *>(m_presenter->plotAreaElement())->setRect(contentGeometry);
}
QGraphicsLayout::setGeometry(rect);
}
QRectF AbstractChartLayout::calculateContentGeometry(const QRectF &geometry) const
{
return geometry.adjusted(m_margins.left(), m_margins.top(), -m_margins.right(), -m_margins.bottom());
}
QRectF AbstractChartLayout::calculateContentMinimum(const QRectF &minimum) const
{
return minimum.adjusted(0, 0, m_margins.left() + m_margins.right(), m_margins.top() + m_margins.bottom());
}
QRectF AbstractChartLayout::calculateBackgroundGeometry(const QRectF &geometry, ChartBackground *background) const
{
qreal left;
qreal top;
qreal right;
qreal bottom;
getContentsMargins(&left, &top, &right, &bottom);
QRectF backgroundGeometry = geometry.adjusted(left, top, -right, -bottom);
if (background)
background->setRect(backgroundGeometry);
return backgroundGeometry;
}
QRectF AbstractChartLayout::calculateBackgroundMinimum(const QRectF &minimum) const
{
qreal left;
qreal top;
qreal right;
qreal bottom;
getContentsMargins(&left, &top, &right, &bottom);
return minimum.adjusted(0, 0, left + right, top + bottom);
}
QRectF AbstractChartLayout::calculateLegendGeometry(const QRectF &geometry, QLegend *legend) const
{
QSizeF size = legend->effectiveSizeHint(Qt::PreferredSize, QSizeF(-1, -1));
QRectF legendRect;
QRectF result;
switch (legend->alignment()) {
case Qt::AlignTop: {
legendRect = QRectF(geometry.topLeft(), QSizeF(geometry.width(), size.height()));
result = geometry.adjusted(0, legendRect.height(), 0, 0);
break;
}
case Qt::AlignBottom: {
legendRect = QRectF(QPointF(geometry.left(), geometry.bottom() - size.height()), QSizeF(geometry.width(), size.height()));
result = geometry.adjusted(0, 0, 0, -legendRect.height());
break;
}
case Qt::AlignLeft: {
qreal width = qMin(size.width(), geometry.width() * golden_ratio);
legendRect = QRectF(geometry.topLeft(), QSizeF(width, geometry.height()));
result = geometry.adjusted(width, 0, 0, 0);
break;
}
case Qt::AlignRight: {
qreal width = qMin(size.width(), geometry.width() * golden_ratio);
legendRect = QRectF(QPointF(geometry.right() - width, geometry.top()), QSizeF(width, geometry.height()));
result = geometry.adjusted(0, 0, -width, 0);
break;
}
default: {
legendRect = QRectF(0, 0, 0, 0);
result = geometry;
break;
}
}
legend->setGeometry(legendRect);
return result;
}
QRectF AbstractChartLayout::calculateLegendMinimum(const QRectF &geometry, QLegend *legend) const
{
QSizeF minSize = legend->effectiveSizeHint(Qt::MinimumSize, QSizeF(-1, -1));
return geometry.adjusted(0, 0, minSize.width(), minSize.height());
}
QRectF AbstractChartLayout::calculateTitleGeometry(const QRectF &geometry, ChartTitle *title) const
{
title->setGeometry(geometry);
QPointF center = geometry.center() - title->boundingRect().center();
title->setPos(center.x(), title->pos().y());
return geometry.adjusted(0, title->boundingRect().height()+1, 0, 0);
}
QRectF AbstractChartLayout::calculateTitleMinimum(const QRectF &minimum, ChartTitle *title) const
{
QSizeF min = title->sizeHint(Qt::MinimumSize);
return minimum.adjusted(0, 0, min.width(), min.height());
}
QSizeF AbstractChartLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint);
if (which == Qt::MinimumSize) {
QList<ChartAxisElement *> axes = m_presenter->axisItems();
ChartTitle *title = m_presenter->titleElement();
QLegend *legend = m_presenter->legend();
QRectF minimumRect(0, 0, 0, 0);
minimumRect = calculateBackgroundMinimum(minimumRect);
minimumRect = calculateContentMinimum(minimumRect);
minimumRect = calculateTitleMinimum(minimumRect, title);
minimumRect = calculateLegendMinimum(minimumRect, legend);
minimumRect = calculateAxisMinimum(minimumRect, axes);
return minimumRect.united(m_minChartRect).size().toSize();
}
return QSize(-1, -1);
}
void AbstractChartLayout::setMargins(const QMargins &margins)
{
if (m_margins != margins) {
m_margins = margins;
updateGeometry();
}
}
QMargins AbstractChartLayout::margins() const
{
return m_margins;
}
QT_CHARTS_END_NAMESPACE
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