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legend documentation fix. detaching and attaching the legend
legend documentation fix. detaching and attaching the legend

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r728:7d3fdc2fff63
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barchartitem.cpp
217 lines | 6.2 KiB | text/x-c | CppLexer
#include "barchartitem_p.h"
#include "bar_p.h"
#include "barvalue_p.h"
#include "qbarset.h"
#include "qbarseries.h"
#include "qchart.h"
#include "qchartaxis.h"
#include "qchartaxiscategories.h"
#include "chartpresenter_p.h"
#include "chartanimator_p.h"
#include "chartdataset_p.h"
#include <QDebug>
#include <QToolTip>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
BarChartItem::BarChartItem(QBarSeries *series, ChartPresenter *presenter) :
ChartItem(presenter),
mLayoutSet(false),
mSeries(series)
{
connect(series,SIGNAL(showToolTip(QPoint,QString)),this,SLOT(showToolTip(QPoint,QString)));
connect(series, SIGNAL(updatedBars()), this, SLOT(handleLayoutChanged()));
//TODO: connect(series,SIGNAL("position or size has changed"), this, SLOT(handleLayoutChanged()));
connect(series, SIGNAL(restructuredBar(int)), this, SLOT(handleModelChanged(int)));
setZValue(ChartPresenter::BarSeriesZValue);
dataChanged();
}
BarChartItem::~BarChartItem()
{
disconnect(this,SLOT(showToolTip(QPoint,QString)));
}
void BarChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
if (!mLayoutSet) {
qDebug() << "BarChartItem::paint called without layout set. Aborting.";
return;
}
foreach(QGraphicsItem* i, childItems()) {
i->paint(painter,option,widget);
}
}
QRectF BarChartItem::boundingRect() const
{
return m_rect;
}
void BarChartItem::dataChanged()
{
// TODO: performance optimizations. Do we really need to delete and create items every time data is changed or can we reuse them?
// Delete old bars
foreach (QGraphicsItem* item, childItems()) {
delete item;
}
mBars.clear();
mFloatingValues.clear();
mLayout.clear();
// Create new graphic items for bars
for (int c=0; c<mSeries->categoryCount(); c++) {
QString category = mSeries->categoryName(c);
for (int s=0; s<mSeries->barsetCount(); s++) {
QBarSet *set = mSeries->barsetAt(s);
Bar *bar = new Bar(category,this);
childItems().append(bar);
mBars.append(bar);
connect(bar,SIGNAL(clicked(QString)),set,SIGNAL(clicked(QString)));
connect(bar,SIGNAL(rightClicked(QString)),set,SIGNAL(rightClicked(QString)));
connect(bar,SIGNAL(hoverEntered(QPoint)),set,SLOT(barHoverEnterEvent(QPoint)));
connect(bar,SIGNAL(hoverLeaved()),set,SLOT(barHoverLeaveEvent()));
mLayout.append(QRectF(0,0,0,0));
}
}
// Create floating values
for (int category=0; category<mSeries->categoryCount(); category++) {
for (int s=0; s<mSeries->barsetCount(); s++) {
QBarSet *set = mSeries->barsetAt(s);
BarValue *value = new BarValue(*set, this);
childItems().append(value);
mFloatingValues.append(value);
connect(set,SIGNAL(toggleFloatingValues()),value,SLOT(toggleVisible()));
}
}
}
QVector<QRectF> BarChartItem::calculateLayout()
{
QVector<QRectF> layout;
// Use temporary qreals for accurancy (we might get some compiler warnings... :)
qreal categoryCount = mSeries->categoryCount();
qreal setCount = mSeries->barsetCount();
qreal width = geometry().width();
qreal height = geometry().height();
qreal max = mSeries->max();
// Domain:
if (mDomainMaxY > max) {
max = mDomainMaxY;
}
qreal scale = (height/max);
qreal categoryWidth = width/categoryCount;
qreal barWidth = categoryWidth / (setCount+1);
int itemIndex(0);
for (int category=0; category < categoryCount; category++) {
qreal xPos = categoryWidth * category + barWidth/2;
qreal yPos = height;
for (int set = 0; set < setCount; set++) {
qreal barHeight = mSeries->valueAt(set,category) * scale;
Bar* bar = mBars.at(itemIndex);
QRectF rect(xPos,yPos-barHeight,barWidth,barHeight);
layout.append(rect);
bar->setPen(mSeries->barsetAt(set)->pen());
bar->setBrush(mSeries->barsetAt(set)->brush());
itemIndex++;
xPos += barWidth;
}
}
// Position floating values
itemIndex = 0;
for (int category=0; category < mSeries->categoryCount(); category++) {
qreal xPos = categoryWidth * category + barWidth;
qreal yPos = height;
for (int set=0; set < mSeries->barsetCount(); set++) {
qreal barHeight = mSeries->valueAt(set,category) * scale;
BarValue* value = mFloatingValues.at(itemIndex);
QBarSet* barSet = mSeries->barsetAt(set);
value->resize(100,50); // TODO: proper layout for this.
value->setPos(xPos, yPos-barHeight/2);
value->setPen(barSet->floatingValuePen());
if (mSeries->valueAt(set,category) != 0) {
value->setValueString(QString::number(mSeries->valueAt(set,category)));
} else {
value->setValueString(QString(""));
}
itemIndex++;
xPos += barWidth;
}
}
return layout;
}
void BarChartItem::applyLayout(const QVector<QRectF> &layout)
{
if (animator())
animator()->updateLayout(this, mLayout, layout);
else
setLayout(layout);
}
void BarChartItem::setLayout(const QVector<QRectF> &layout)
{
mLayout = layout;
for (int i=0; i<mBars.count(); i++) {
mBars.at(i)->setRect(layout.at(i));
}
update();
}
//handlers
void BarChartItem::handleModelChanged(int index)
{
Q_UNUSED(index)
dataChanged();
}
void BarChartItem::handleDomainChanged(qreal minX, qreal maxX, qreal minY, qreal maxY)
{
mDomainMinX = minX;
mDomainMaxX = maxX;
mDomainMinY = minY;
mDomainMaxY = maxY;
handleLayoutChanged();
}
void BarChartItem::handleGeometryChanged(const QRectF& rect)
{
m_rect=rect;
handleLayoutChanged();
mLayoutSet = true;
setPos(rect.topLeft());
}
void BarChartItem::handleLayoutChanged()
{
QVector<QRectF> layout = calculateLayout();
applyLayout(layout);
update();
}
void BarChartItem::showToolTip(QPoint pos, QString tip)
{
// TODO: cool tooltip instead of default
QToolTip::showText(pos,tip);
}
#include "moc_barchartitem_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE