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9beec46e22
Dirk says rounded corners look better. This now looks a bit extreme to me and probably the border size should be increased. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include "informationbox.h"
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#include "statscolors.h"
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#include "zvalues.h"
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#include <QChart>
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#include <QFontMetrics>
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static const QColor informationBorderColor(Qt::black);
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static const QColor informationColor(0xff, 0xff, 0x00, 192); // Note: fourth argument is opacity
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static const int informationBorder = 2;
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static const double informationBorderRadius = 4.0; // Radius of rounded corners
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static const int distanceFromPointer = 10; // Distance to place box from mouse pointer or scatter item
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InformationBox::InformationBox(QtCharts::QChart *chart) : RoundRectItem(informationBorderRadius, chart), chart(chart)
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{
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setPen(QPen(informationBorderColor, informationBorder));
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setBrush(informationColor);
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setZValue(ZValues::informationBox);
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}
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void InformationBox::setText(const std::vector<QString> &text, QPointF pos)
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{
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width = height = 0.0;
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textItems.clear();
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for (const QString &s: text) {
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if (!s.isEmpty())
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addLine(s);
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}
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width += 4.0 * informationBorder;
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height += 4.0 * informationBorder;
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// Setting the position will also set the proper size
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setPos(pos);
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}
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void InformationBox::setPos(QPointF pos)
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{
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QRectF plotArea = chart->plotArea();
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double x = pos.x() + distanceFromPointer;
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if (x + width >= plotArea.right() && pos.x() - width >= plotArea.x())
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x = pos.x() - width;
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double y = pos.y() + distanceFromPointer;
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if (y + height >= plotArea.bottom() && pos.y() - height >= plotArea.y())
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y = pos.y() - height;
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setRect(x, y, width, height);
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double actY = y + 2.0 * informationBorder;
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for (auto &item: textItems) {
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item->setPos(QPointF(x + 2.0 * informationBorder, actY));
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actY += item->boundingRect().height();
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}
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}
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void InformationBox::addLine(const QString &s)
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{
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textItems.emplace_back(new QGraphicsSimpleTextItem(s, this));
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QGraphicsSimpleTextItem &item = *textItems.back();
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item.setBrush(QBrush(darkLabelColor));
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item.setPos(QPointF(0.0, height));
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item.setFont(font);
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item.setZValue(ZValues::informationBox);
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QRectF rect = item.boundingRect();
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width = std::max(width, rect.width());
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height += rect.height();
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}
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// Try to stay within three-thirds of the chart height
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int InformationBox::recommendedMaxLines() const
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{
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QFontMetrics fm(font);
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int maxHeight = static_cast<int>(chart->plotArea().height());
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return maxHeight * 2 / fm.height() / 3;
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}
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