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/****************************************************************************
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**
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** Copyright (C) 2012 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 "legendmarker_p.h"
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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static const qreal golden_ratio = 0.25;
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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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}
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if (legend->isAttachedToChart() && legend->isVisible()) {
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contentGeometry = calculateLegendGeometry(contentGeometry,legend);
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}
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calculateChartGeometry(contentGeometry,axes);
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//TODO remove me
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#ifdef SHOW_LAYOUT
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LayoutDebuger* debuger = LayoutDebuger::instance();
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debuger->reset();
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debuger->setPen(QPen(Qt::red));
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debuger->add(backgroundGeometry,m_presenter->rootItem());
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debuger->add(titleGeometry,m_presenter->rootItem());
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debuger->add(legendGeometry ,m_presenter->rootItem());
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debuger->add(axisGeometry ,m_presenter->rootItem());
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debuger->add(geometry,m_presenter->rootItem());
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foreach(LegendMarker* marker,legend->d_ptr->markers()){
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debuger->add(marker->mapRectToScene(marker->boundingRect()),m_presenter->rootItem());
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}
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#endif
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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) 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::calculateChartGeometry(const QRectF& geometry, const QList<ChartAxis*>& axes) const
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{
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QSizeF vertical(0,0);
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QSizeF horizontal(0,0);
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// check axis size
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foreach(ChartAxis* axis , axes) {
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if(axis->orientation()==Qt::Vertical && axis->isVisible()) {
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vertical = vertical.expandedTo(axis->effectiveSizeHint(Qt::MinimumSize));
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}
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else if(axis->orientation()==Qt::Horizontal && axis->isVisible()) {
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horizontal = horizontal.expandedTo(axis->effectiveSizeHint(Qt::MinimumSize));
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}
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}
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qreal width = qMin(vertical.width(),geometry.width() * golden_ratio);
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QRectF rect = geometry.adjusted(width,vertical.height()/2,-horizontal.width()/2,-horizontal.height());
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m_presenter->setChartsGeometry(rect);
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foreach(ChartAxis* axis , axes) {
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axis->setGeometry(geometry);
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}
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return rect;
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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 vertical(0,0);
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QSizeF horizontal(0,0);
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// check axis size
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foreach(ChartAxis* axis , axes) {
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if(axis->orientation()==Qt::Vertical && axis->isVisible()){
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vertical = vertical.expandedTo(axis->effectiveSizeHint(Qt::MinimumSize));
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}else if(axis->orientation()==Qt::Horizontal && axis->isVisible()) {
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horizontal = horizontal.expandedTo(axis->effectiveSizeHint(Qt::MinimumSize));
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}
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}
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return minimum.adjusted(0,0,horizontal.width()+vertical.width(),horizontal.height() + vertical.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()*golden_ratio);
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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()*golden_ratio);
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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(),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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}else
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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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void ChartLayout::adjustChartGeometry()
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{
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setGeometry(geometry());
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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