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https://github.com/fralx/LimeReport.git
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107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
#include "lrgridlineschart.h"
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namespace LimeReport {
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void GridLinesChart::paintChart(QPainter* painter, QRectF chartRect)
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{
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updateMinAndMaxValues();
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const qreal hPadding = this->hPadding(chartRect);
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const qreal vPadding = this->vPadding(chartRect);
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const qreal valuesVMargin = this->valuesVMargin(painter);
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QRectF gridRect
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= chartRect.adjusted(hPadding, vPadding + valuesVMargin * 2, -hPadding * 3, -vPadding * 3);
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if (!m_chartItem->horizontalAxisOnTop()) {
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// If horizontal axis is on the bottom, move grid a little up
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gridRect.adjust(0, -valuesVMargin, 0, -valuesVMargin);
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}
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// Adapt font for horizontal axis
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painter->setFont(adaptFont((gridRect.width() - this->valuesHMargin(painter))
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/ xAxisData().segmentCount() * 0.8,
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painter->font(), xAxisData()));
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const qreal valuesHMargin = this->valuesHMargin(painter);
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// Adjust vertical axis labels padding
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gridRect.adjust(valuesHMargin * 0.2, 0, 0, 0);
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paintGrid(painter, gridRect);
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paintSerialLines(painter, gridRect.adjusted(hPadding + valuesHMargin, 0, 0, 0));
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}
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void GridLinesChart::paintSerialLines(QPainter* painter, QRectF barsRect)
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{
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if (valuesCount() == 0)
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return;
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painter->save();
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painter->setRenderHint(QPainter::Antialiasing, true);
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const AxisData& yAxisData = this->yAxisData();
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const qreal delta = yAxisData.delta();
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if (m_chartItem->itemMode() == DesignMode) {
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const qreal hStep = barsRect.width() / valuesCount();
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const qreal vStep = barsRect.height() / delta;
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const qreal topShift = (delta - (maxValue() - minValue())) * vStep + barsRect.top();
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drawDesignMode(painter, hStep, vStep, topShift, barsRect);
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painter->restore();
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return;
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}
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const AxisData& xAxisData = this->xAxisData();
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const qreal hStep = barsRect.width() / (xAxisData.rangeMax() - xAxisData.rangeMin());
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qreal leftMargin = 0;
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const qreal topMargin = barsRect.top();
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for (SeriesItem* series : m_chartItem->series()) {
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QPen pen(series->color());
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pen.setWidth(m_chartItem->seriesLineWidth());
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painter->setPen(pen);
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const QList<qreal>& xAxisValues = series->data()->xAxisValues();
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const QList<qreal>& values = series->data()->values();
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const int xAxisValuesSize = xAxisValues.size();
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qreal lastXPos = 0;
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qreal lastYPos = 0;
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if (!values.isEmpty()) {
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// Calculate first point position on plot before loop
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lastYPos = calculatePos(yAxisData, values.first(), barsRect.height());
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}
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if (xAxisValues.isEmpty()) {
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leftMargin = barsRect.left();
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} else {
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leftMargin = barsRect.left();
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lastXPos = calculatePos(xAxisData, xAxisValues.first(), barsRect.width());
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}
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for (int i = 0; i < values.count() - 1; ++i) {
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const qreal startY = lastYPos;
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const qreal endY = calculatePos(yAxisData, values.at(i + 1), barsRect.height());
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// Record last used Y position to only calculate new one
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lastYPos = endY;
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qreal startX = lastXPos;
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qreal endX = 0;
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if (i + 1 < xAxisValuesSize) {
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endX = calculatePos(xAxisData, xAxisValues.at(i + 1), barsRect.width());
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} else {
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endX = startX + hStep;
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}
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// Record last used X position to only calculate new one
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lastXPos = endX;
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QPoint startPoint = QPoint(startX + leftMargin, startY + topMargin);
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QPoint endPoint = QPoint(endX + leftMargin, endY + topMargin);
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drawSegment(painter, startPoint, endPoint, series->color());
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}
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}
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painter->restore();
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}
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} // namespace LimeReport
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