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#include "axisitem_p.h"
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#include "qchartaxis.h"
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#include "chartpresenter_p.h"
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#include <QPainter>
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#include <QDebug>
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static int label_padding = 5;
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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AxisItem::AxisItem(AxisType type,QGraphicsItem* parent) :
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ChartItem(parent),
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m_type(type),
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m_labelsAngle(0),
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m_grid(parent),
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m_shades(parent),
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m_labels(parent),
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m_axis(parent)
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{
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//initial initialization
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m_axis.setZValue(ChartPresenter::AxisZValue);
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m_shades.setZValue(ChartPresenter::ShadesZValue);
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m_grid.setZValue(ChartPresenter::GridZValue);
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setFlags(QGraphicsItem::ItemHasNoContents);
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}
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AxisItem::~AxisItem()
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{
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}
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QRectF AxisItem::boundingRect() const
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{
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return QRectF();
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}
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void AxisItem::createItems(int count)
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{
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if(m_axis.children().size()==0)
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m_axis.addToGroup(new QGraphicsLineItem());
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for (int i = 0; i < count; ++i) {
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m_grid.addToGroup(new QGraphicsLineItem());
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m_labels.addToGroup(new QGraphicsSimpleTextItem());
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if(m_grid.childItems().size()%2) m_shades.addToGroup(new QGraphicsRectItem());
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m_axis.addToGroup(new QGraphicsLineItem());
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}
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}
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void AxisItem::clear(int count)
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{
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QList<QGraphicsItem *> lines = m_grid.childItems();
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QList<QGraphicsItem *> labels = m_labels.childItems();
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QList<QGraphicsItem *> shades = m_shades.childItems();
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QList<QGraphicsItem *> axis = m_axis.childItems();
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for (int i = 0; i < count; ++i) {
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delete(lines.takeLast());
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delete(labels.takeLast());
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if(lines.size()%2) delete(shades.takeLast());
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delete(axis.takeLast());
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}
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}
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void AxisItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(painter);
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Q_UNUSED(option);
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Q_UNUSED(widget);
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}
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void AxisItem::updateItems(QVector<qreal>& oldLayout,QVector<qreal>& newLayout)
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{
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if(newLayout.count()==0) return;
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applyLayout(newLayout);
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oldLayout=newLayout;
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}
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void AxisItem::handleAxisUpdate(QChartAxis* axis)
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{
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if(m_layoutVector.count()==0) return;
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if(axis->isAxisVisible()) {
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setAxisOpacity(100);
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}
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else {
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setAxisOpacity(0);
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}
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if(axis->isGridVisible()) {
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setGridOpacity(100);
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}
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else {
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setGridOpacity(0);
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}
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if(axis->labelsVisible())
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{
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setLabelsOpacity(100);
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}
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else {
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setLabelsOpacity(0);
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}
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if(axis->shadesVisible()) {
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setShadesOpacity(axis->shadesOpacity());
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}
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else {
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setShadesOpacity(0);
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}
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setLabelsAngle(axis->labelsAngle());
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setAxisPen(axis->axisPen());
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setLabelsPen(axis->labelsPen());
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setLabelsBrush(axis->labelsBrush());
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setLabelsFont(axis->labelsFont());
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setGridPen(axis->gridPen());
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setShadesPen(axis->shadesPen());
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setShadesBrush(axis->shadesBrush());
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}
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void AxisItem::handleRangeChanged(QChartAxis* axis,const QStringList& labels)
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{
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int diff = m_thicksList.size() - labels.size();
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if(diff>0){
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clear(diff);
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}else if(diff<0){
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createItems(-diff);
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}
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m_thicksList=labels;
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QVector<qreal> vector = calculateLayout();
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updateItems(m_layoutVector,vector);
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if(diff!=0) handleAxisUpdate(axis);
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}
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void AxisItem::handleGeometryChanged(const QRectF& rect)
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{
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m_rect = rect;
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if(m_thicksList.size()==0) return;
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QVector<qreal> vector = calculateLayout();
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updateItems(m_layoutVector,vector);
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}
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void AxisItem::setAxisOpacity(qreal opacity)
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{
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m_axis.setOpacity(opacity);
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}
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qreal AxisItem::axisOpacity() const
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{
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return m_axis.opacity();
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}
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void AxisItem::setGridOpacity(qreal opacity)
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{
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m_grid.setOpacity(opacity);
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}
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qreal AxisItem::gridOpacity() const
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{
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return m_grid.opacity();
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}
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void AxisItem::setLabelsOpacity(qreal opacity)
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{
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m_labels.setOpacity(opacity);
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}
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qreal AxisItem::labelsOpacity() const
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{
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return m_labels.opacity();
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}
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void AxisItem::setShadesOpacity(qreal opacity)
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{
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m_shades.setOpacity(opacity);
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}
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qreal AxisItem::shadesOpacity() const
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{
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return m_shades.opacity();
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}
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void AxisItem::setLabelsAngle(int angle)
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{
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foreach(QGraphicsItem* item , m_labels.childItems()) {
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QPointF center = item->boundingRect().center();
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item->setRotation(angle);
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}
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m_labelsAngle=angle;
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}
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void AxisItem::setLabelsPen(const QPen& pen)
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{
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foreach(QGraphicsItem* item , m_labels.childItems()) {
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static_cast<QGraphicsSimpleTextItem*>(item)->setPen(pen);
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}
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}
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void AxisItem::setLabelsBrush(const QBrush& brush)
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{
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foreach(QGraphicsItem* item , m_labels.childItems()) {
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static_cast<QGraphicsSimpleTextItem*>(item)->setBrush(brush);
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}
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}
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void AxisItem::setLabelsFont(const QFont& font)
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{
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foreach(QGraphicsItem* item , m_labels.childItems()) {
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static_cast<QGraphicsSimpleTextItem*>(item)->setFont(font);
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}
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}
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void AxisItem::setShadesBrush(const QBrush& brush)
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{
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foreach(QGraphicsItem* item , m_shades.childItems()) {
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static_cast<QGraphicsRectItem*>(item)->setBrush(brush);
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}
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}
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void AxisItem::setShadesPen(const QPen& pen)
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{
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foreach(QGraphicsItem* item , m_shades.childItems()) {
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static_cast<QGraphicsRectItem*>(item)->setPen(pen);
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}
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}
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void AxisItem::setAxisPen(const QPen& pen)
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{
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foreach(QGraphicsItem* item , m_axis.childItems()) {
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static_cast<QGraphicsLineItem*>(item)->setPen(pen);
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}
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}
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void AxisItem::setGridPen(const QPen& pen)
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{
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foreach(QGraphicsItem* item , m_grid.childItems()) {
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static_cast<QGraphicsLineItem*>(item)->setPen(pen);
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}
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}
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QVector<qreal> AxisItem::calculateLayout() const
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{
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QVector<qreal> points;
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points.resize(m_thicksList.size());
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switch (m_type)
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{
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case X_AXIS:
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{
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const qreal deltaX = m_rect.width()/(m_thicksList.size()-1);
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for (int i = 0; i < m_thicksList.size(); ++i) {
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int x = i * deltaX + m_rect.left();
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points[i] = x;
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}
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}
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break;
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case Y_AXIS:
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{
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const qreal deltaY = m_rect.height()/(m_thicksList.size()-1);
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for (int i = 0; i < m_thicksList.size(); ++i) {
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int y = i * -deltaY + m_rect.bottom();
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points[i] = y;
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}
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}
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break;
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}
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return points;
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}
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void AxisItem::applyLayout(const QVector<qreal>& points)
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{
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Q_ASSERT(points.size() == m_thicksList.size());
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QList<QGraphicsItem *> lines = m_grid.childItems();
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QList<QGraphicsItem *> labels = m_labels.childItems();
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QList<QGraphicsItem *> shades = m_shades.childItems();
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QList<QGraphicsItem *> axis = m_axis.childItems();
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Q_ASSERT(labels.size() == m_thicksList.size());
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switch (m_type)
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{
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case X_AXIS:
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{
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0));
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lineItem->setLine(m_rect.left(), m_rect.bottom(), m_rect.right(), m_rect.bottom());
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for (int i = 0; i < points.size(); ++i) {
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i));
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lineItem->setLine(points[i], m_rect.top(), points[i], m_rect.bottom());
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QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i));
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labelItem->setText(m_thicksList.at(i));
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QPointF center = labelItem->boundingRect().center();
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labelItem->setTransformOriginPoint(center.x(), center.y());
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labelItem->setPos(points[i] - center.x(), m_rect.bottom() + label_padding);
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if(i%2){
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QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2));
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rectItem->setRect(points[i],m_rect.top(),points[i+1]-points[i],m_rect.height());
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}
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lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1));
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lineItem->setLine(points[i],m_rect.bottom(),points[i],m_rect.bottom()+5);
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}
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}
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break;
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case Y_AXIS:
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{
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0));
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lineItem->setLine(m_rect.left() , m_rect.top(), m_rect.left(), m_rect.bottom());
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for (int i = 0; i < points.size(); ++i) {
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i));
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lineItem->setLine(m_rect.left() , points[i], m_rect.right(), points[i]);
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QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i));
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labelItem->setText(m_thicksList.at(i));
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QPointF center = labelItem->boundingRect().center();
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labelItem->setTransformOriginPoint(center.x(), center.y());
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labelItem->setPos(m_rect.left() - labelItem->boundingRect().width() - label_padding , points[i]-center.y());
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if(i%2){
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QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2));
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rectItem->setRect(m_rect.left(),points[i],m_rect.width(),points[i]-points[i+1]);
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}
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lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1));
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lineItem->setLine(m_rect.left()-5,points[i],m_rect.left(),points[i]);
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}
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}
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break;
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default:
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qDebug()<<"Unknown axis type";
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break;
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}
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}
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//TODO "nice numbers algorithm"
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#include "moc_axisitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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