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Added initial implementation of painting of stack chart.

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23rd 2023-08-28 02:40:59 +03:00 • committed by John Preston
parent 2ddc1ee2e1
commit 20c2250abb
1 changed files with 61 additions and 0 deletions
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61
Telegram/SourceFiles/statistics/view/stack_chart_view.cpp
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@ -25,6 +25,67 @@ void StackChartView::paint(
const Limits &heightLimits, const Limits &heightLimits,
const QRect &rect, const QRect &rect,
bool footer) { bool footer) {
const auto localStart = std::max(0, int(xIndices.min) - 2);
const auto localEnd = std::min(
int(chartData.xPercentage.size() - 1),
int(xIndices.max) + 2);
const auto fullWidth = rect.width() / (xPercentageLimits.max - xPercentageLimits.min);
const auto offset = fullWidth * xPercentageLimits.min;
const auto pp = (chartData.xPercentage.size() < 2)
? 1.
: chartData.xPercentage[1] * fullWidth;
const auto w = chartData.xPercentage[1] * (fullWidth - pp);
// const auto w = rect.width() / float64(localEnd - localStart);
const auto r = w / 2.;
const auto leftStart = chartData.xPercentage[localStart] * (fullWidth - pp) - offset + rect.x();
auto paths = std::vector<QPainterPath>();
paths.resize(chartData.lines.size());
for (auto i = localStart; i <= localEnd; i++) {
auto chartPoints = QPolygonF();
const auto xPoint = rect.width()
* ((chartData.xPercentage[i] - xPercentageLimits.min)
/ (xPercentageLimits.max - xPercentageLimits.min));
auto bottom = float64(-rect.y());
const auto left = leftStart + (i - localStart) * w;
for (auto j = 0; j < chartData.lines.size(); j++) {
const auto &line = chartData.lines[j];
if (line.y[i] <= 0) {
continue;
}
const auto yPercentage = (line.y[i] - heightLimits.min)
/ float64(heightLimits.max - heightLimits.min);
const auto yPoint = yPercentage * rect.height() * alpha(line.id);
// const auto column = QRectF(
// xPoint - r,
// rect.height() - bottom - yPoint,
// w,
// yPoint);
const auto column = QRectF(
left,
rect.height() - bottom - yPoint,
w,
yPoint);
paths[j].addRect(column);
// p.setPen(Qt::NoPen);
// p.setBrush(line.color);
// p.setOpacity(0.3);
// // p.setOpacity(1.);
// p.drawRect(column);
// p.setOpacity(1.);
bottom += yPoint;
}
}
p.setPen(Qt::NoPen);
for (auto i = 0; i < paths.size(); i++) {
p.fillPath(paths[i], chartData.lines[i].color);
}
} }
void StackChartView::paintSelectedXIndex( void StackChartView::paintSelectedXIndex(