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#include "informationbox.h"
#include "statscolors.h"
#include "zvalues.h"
#include <QChart>
#include <QFontMetrics>
static const QColor informationBorderColor(Qt::black);
static const QColor informationColor(0xff, 0xff, 0x00, 192); // Note: fourth argument is opacity
static const int informationBorder = 2;
static const double informationBorderRadius = 4.0; // Radius of rounded corners
static const int distanceFromPointer = 10; // Distance to place box from mouse pointer or scatter item
InformationBox::InformationBox(QtCharts::QChart *chart) : RoundRectItem(informationBorderRadius, chart), chart(chart)
{
setPen(QPen(informationBorderColor, informationBorder));
setBrush(informationColor);
setZValue(ZValues::informationBox);
}
void InformationBox::setText(const std::vector<QString> &text, QPointF pos)
{
width = height = 0.0;
textItems.clear();
for (const QString &s: text) {
if (!s.isEmpty())
addLine(s);
}
width += 4.0 * informationBorder;
height += 4.0 * informationBorder;
// Setting the position will also set the proper size
setPos(pos);
}
void InformationBox::setPos(QPointF pos)
{
QRectF plotArea = chart->plotArea();
double x = pos.x() + distanceFromPointer;
if (x + width >= plotArea.right() && pos.x() - width >= plotArea.x())
x = pos.x() - width;
double y = pos.y() + distanceFromPointer;
if (y + height >= plotArea.bottom() && pos.y() - height >= plotArea.y())
y = pos.y() - height;
setRect(x, y, width, height);
double actY = y + 2.0 * informationBorder;
for (auto &item: textItems) {
item->setPos(QPointF(x + 2.0 * informationBorder, actY));
actY += item->boundingRect().height();
}
}
void InformationBox::addLine(const QString &s)
{
textItems.emplace_back(new QGraphicsSimpleTextItem(s, this));
QGraphicsSimpleTextItem &item = *textItems.back();
item.setBrush(QBrush(darkLabelColor));
item.setPos(QPointF(0.0, height));
item.setFont(font);
item.setZValue(ZValues::informationBox);
QRectF rect = item.boundingRect();
width = std::max(width, rect.width());
height += rect.height();
}
// Try to stay within three-thirds of the chart height
int InformationBox::recommendedMaxLines() const
{
QFontMetrics fm(font);
int maxHeight = static_cast<int>(chart->plotArea().height());
return maxHeight * 2 / fm.height() / 3;
}
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