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Diffstat (limited to 'src/charts/layout/abstractchartlayout.cpp')
| -rw-r--r-- | src/charts/layout/abstractchartlayout.cpp | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/charts/layout/abstractchartlayout.cpp b/src/charts/layout/abstractchartlayout.cpp new file mode 100644 index 00000000..b0d3d067 --- /dev/null +++ b/src/charts/layout/abstractchartlayout.cpp @@ -0,0 +1,203 @@ +/**************************************************************************** +** +** 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 "abstractchartlayout_p.h" +#include "chartpresenter_p.h" +#include "qlegend_p.h" +#include "chartaxiselement_p.h" +#include "charttitle_p.h" +#include "chartbackground_p.h" +#include <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 |