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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 "legendlayout_p.h"
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#include "chartpresenter_p.h"
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#include "legendmarker_p.h"
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#include "qlegend_p.h"
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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LegendLayout::LegendLayout(QLegend* legend):
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m_legend(legend)
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{
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}
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LegendLayout::~LegendLayout()
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{
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}
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void LegendLayout::setOffset(qreal x, qreal y)
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{
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bool scrollHorizontal = true;
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switch(m_legend->alignment()) {
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case Qt::AlignTop:
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case Qt::AlignBottom: {
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scrollHorizontal = true;
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break;
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}
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case Qt::AlignLeft:
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case Qt::AlignRight: {
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scrollHorizontal = false;
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break;
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}
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}
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// If detached, the scrolling direction is vertical instead of horizontal and vice versa.
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if (!m_legend->isAttachedToChart()) {
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scrollHorizontal = !scrollHorizontal;
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}
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QRectF boundingRect = geometry();
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// Limit offset between m_minOffset and m_maxOffset
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if (scrollHorizontal) {
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if(m_width<=boundingRect.width()) return;
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if (x != m_offsetX) {
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m_offsetX = qBound(m_minOffsetX, x, m_maxOffsetX);
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m_legend->d_ptr->items()->setPos(-m_offsetX,boundingRect.top());
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}
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}
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else {
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if(m_height<=boundingRect.height()) return;
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if (y != m_offsetY) {
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m_offsetY = qBound(m_minOffsetY, y, m_maxOffsetY);
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m_legend->d_ptr->items()->setPos(boundingRect.left(),-m_offsetY);
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}
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}
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}
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QPointF LegendLayout::offset() const
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{
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return QPointF(m_offsetX,m_offsetY);
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}
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void LegendLayout::setGeometry(const QRectF& rect)
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{
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QGraphicsLayout::setGeometry(rect);
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if(m_legend->isAttachedToChart()) {
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setAttachedGeometry(rect);
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}
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else {
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setDettachedGeometry(rect);
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}
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}
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void LegendLayout::setAttachedGeometry(const QRectF& rect)
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{
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if (!rect.isValid()) return;
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m_offsetX=0;
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m_offsetY=0;
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QSizeF size(0,0);
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if( m_legend->d_ptr->markers().isEmpty()) return;
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m_width=0;
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m_height=0;
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switch(m_legend->alignment()) {
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case Qt::AlignTop:
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case Qt::AlignBottom: {
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QPointF point(0,0);
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foreach (LegendMarker* marker, m_legend->d_ptr->markers()) {
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if (marker->isVisible()) {
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marker->setGeometry(QRectF(QPoint(0,0),marker->effectiveSizeHint(Qt::PreferredSize)));
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marker->setPos(point.x(),rect.height()/2 - marker->boundingRect().height()/2);
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const QRectF& rect = marker->boundingRect();
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size = size.expandedTo(rect.size());
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qreal w = rect.width();
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m_width+=w;
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point.setX(point.x() + w);
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}
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}
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if(m_width<rect.width()) {
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m_legend->d_ptr->items()->setPos(rect.width()/2-m_width/2,rect.top());
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}
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else {
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m_legend->d_ptr->items()->setPos(rect.topLeft());
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}
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m_height=size.height();
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}
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break;
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case Qt::AlignLeft:
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case Qt::AlignRight: {
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QPointF point(0,0);
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foreach (LegendMarker* marker, m_legend->d_ptr->markers()) {
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if (marker->isVisible()) {
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marker->setGeometry(QRectF(QPoint(0,0),marker->effectiveSizeHint(Qt::PreferredSize)));
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marker->setPos(point);
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const QRectF& rect = marker->boundingRect();
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qreal h = rect.height();
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size = size.expandedTo(rect.size());
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m_height+=h;
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point.setY(point.y() + h);
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}
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}
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if(m_height<rect.height()) {
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m_legend->d_ptr->items()->setPos(rect.left(),rect.height()/2-m_height/2);
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}
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else {
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m_legend->d_ptr->items()->setPos(rect.topLeft());
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}
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m_width=size.width();
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}
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break;
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}
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m_minOffsetX = 0;
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m_minOffsetY = 0;
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m_maxOffsetX = m_width - rect.width();
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m_maxOffsetY = m_height - rect.height();
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}
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void LegendLayout::setDettachedGeometry(const QRectF& rect)
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{
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if (!rect.isValid()) return;
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// Detached layout is different.
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// In detached mode legend may have multiple rows and columns, so layout calculations
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// differ a log from attached mode.
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// Also the scrolling logic is bit different.
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m_offsetX=0;
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m_offsetY=0;
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QSizeF size(0,0);
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QList<LegendMarker *> markers = m_legend->d_ptr->markers();
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if(markers.isEmpty()) return;
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switch (m_legend->alignment()) {
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case Qt::AlignTop: {
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QPointF point = rect.topLeft();
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m_width = 0;
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m_height = 0;
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for (int i=0; i<markers.count(); i++) {
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LegendMarker *marker = markers.at(i);
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if (marker->isVisible()) {
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marker->setGeometry(QRectF(QPoint(0,0),marker->effectiveSizeHint(Qt::PreferredSize)));
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marker->setPos(point.x(),point.y());
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const QRectF& boundingRect = marker->boundingRect();
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qreal w = boundingRect.width();
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qreal h = boundingRect.height();
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m_width = qMax(m_width,w);
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m_height = qMax(m_height,h);
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point.setX(point.x() + w);
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if (point.x() + w > rect.topLeft().x() + rect.width()) {
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// Next item would go off rect.
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point.setX(rect.topLeft().x());
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point.setY(point.y() + h);
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if (i+1 < markers.count()) {
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m_height += h;
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}
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}
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}
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}
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m_legend->d_ptr->items()->setPos(rect.topLeft());
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m_minOffsetX = 0;
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m_minOffsetY = 0;
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m_maxOffsetX = m_width - rect.width();
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m_maxOffsetY = m_height - rect.height();
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}
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break;
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case Qt::AlignBottom: {
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QPointF point = rect.bottomLeft();
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m_width = 0;
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m_height = 0;
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for (int i=0; i<markers.count(); i++) {
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LegendMarker *marker = markers.at(i);
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if (marker->isVisible()) {
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marker->setGeometry(QRectF(QPoint(0,0),marker->effectiveSizeHint(Qt::PreferredSize)));
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const QRectF& boundingRect = marker->boundingRect();
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qreal w = boundingRect.width();
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qreal h = boundingRect.height();
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m_width = qMax(m_width,w);
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m_height = qMax(m_height,h);
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marker->setPos(point.x(),point.y() - h);
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point.setX(point.x() + w);
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if (point.x() + w > rect.bottomLeft().x() + rect.width()) {
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// Next item would go off rect.
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point.setX(rect.bottomLeft().x());
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point.setY(point.y() - h);
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if (i+1 < markers.count()) {
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m_height += h;
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}
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}
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}
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}
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m_legend->d_ptr->items()->setPos(rect.topLeft());
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m_minOffsetX = 0;
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m_minOffsetY = qMin(rect.topLeft().y(), rect.topLeft().y() - m_height + rect.height());
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m_maxOffsetX = m_width - rect.width();
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m_maxOffsetY = 0;
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}
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break;
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case Qt::AlignLeft: {
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QPointF point = rect.topLeft();
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m_width = 0;
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m_height = 0;
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qreal maxWidth = 0;
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for (int i=0; i<markers.count(); i++) {
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LegendMarker *marker = markers.at(i);
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if (marker->isVisible()) {
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marker->setGeometry(QRectF(QPoint(0,0),marker->effectiveSizeHint(Qt::PreferredSize)));
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const QRectF& boundingRect = marker->boundingRect();
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qreal w = boundingRect.width();
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qreal h = boundingRect.height();
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m_height = qMax(m_height,h);
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maxWidth = qMax(maxWidth,w);
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marker->setPos(point.x(),point.y());
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point.setY(point.y() + h);
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if (point.y() + h > rect.topLeft().y() + rect.height()) {
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// Next item would go off rect.
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point.setX(point.x() + maxWidth);
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point.setY(rect.topLeft().y());
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if (i+1 < markers.count()) {
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m_width += maxWidth;
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maxWidth = 0;
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}
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}
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}
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}
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m_width += maxWidth;
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m_legend->d_ptr->items()->setPos(rect.topLeft());
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m_minOffsetX = 0;
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m_minOffsetY = 0;
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m_maxOffsetX = m_width - rect.width();
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m_maxOffsetY = m_height - rect.height();
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}
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break;
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case Qt::AlignRight: {
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QPointF point = rect.topRight();
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m_width = 0;
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m_height = 0;
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qreal maxWidth = 0;
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for (int i=0; i<markers.count(); i++) {
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LegendMarker *marker = markers.at(i);
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if (marker->isVisible()) {
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marker->setGeometry(QRectF(QPoint(0,0),marker->effectiveSizeHint(Qt::PreferredSize)));
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const QRectF& boundingRect = marker->boundingRect();
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qreal w = boundingRect.width();
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qreal h = boundingRect.height();
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m_height = qMax(m_height,h);
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maxWidth = qMax(maxWidth,w);
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marker->setPos(point.x() - w,point.y());
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point.setY(point.y() + h);
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if (point.y() + h > rect.topLeft().y() + rect.height()) {
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// Next item would go off rect.
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point.setX(point.x() - maxWidth);
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point.setY(rect.topLeft().y());
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if (i+1 < markers.count()) {
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m_width += maxWidth;
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maxWidth = 0;
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}
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}
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}
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}
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m_width += maxWidth;
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m_legend->d_ptr->items()->setPos(rect.topLeft());
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m_minOffsetX = qMin(rect.topLeft().x(), rect.topLeft().x() - m_width + rect.width());
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m_minOffsetY = 0;
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m_maxOffsetX = 0;
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m_maxOffsetY = m_height - rect.height();
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}
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break;
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default:
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break;
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}
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}
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QSizeF LegendLayout::sizeHint ( Qt::SizeHint which, const QSizeF & constraint) const
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{
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QSizeF size(0, 0);
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qreal left, top, right, bottom;
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getContentsMargins(&left, &top, &right, &bottom);
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if(which!=Qt::PreferredSize) return QSizeF(-1,-1);
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if(constraint.isValid()) {
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foreach(LegendMarker* marker, m_legend->d_ptr->markers()) {
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size = size.expandedTo(marker->effectiveSizeHint(which));
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}
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size = size.boundedTo(constraint);
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}
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else if (constraint.width() >= 0) {
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qreal width = 0;
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qreal height = 0;
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foreach(LegendMarker* marker, m_legend->d_ptr->markers()) {
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width+=marker->effectiveSizeHint(which).width();
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height=qMax(height,marker->effectiveSizeHint(which).height());
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}
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size = QSizeF(qMin(constraint.width(),width), height);
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}
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else if (constraint.height() >= 0) {
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qreal width = 0;
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qreal height = 0;
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foreach(LegendMarker* marker, m_legend->d_ptr->markers()) {
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width=qMax(width,marker->effectiveSizeHint(which).width());
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height+=height,marker->effectiveSizeHint(which).height();
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}
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size = QSizeF(width,qMin(constraint.height(),height));
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}
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else {
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foreach(LegendMarker* marker, m_legend->d_ptr->markers()) {
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size = size.expandedTo(marker->effectiveSizeHint(which));
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}
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}
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size += QSize(left + right, top + bottom);
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return size;
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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