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Code Issues Releases Wiki Activity

Added initial support of static zoom for chart widget.

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This commit is contained in:
23rd
2023-05-26 16:04:33 +03:00
committed by John Preston
parent 26b17325aa
commit e8aa55d4d8
6 changed files with 75 additions and 11 deletions
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51
Telegram/SourceFiles/statistics/chart_widget.cpp
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@@ -73,10 +73,14 @@ class ChartWidget::Footer final : public Ui::AbstractButton {
public:
Footer(not_null<Ui::RpWidget*> parent);
[[nodiscard]] rpl::producer<Limits> xPercentageLimitsChange() const;
private:
not_null<Ui::AbstractButton*> _left;
not_null<Ui::AbstractButton*> _right;
rpl::event_stream<Limits> _xPercentageLimitsChange;
struct {
int x = 0;
int leftLimit = 0;
@@ -135,6 +139,10 @@ ChartWidget::Footer::Footer(not_null<Ui::RpWidget*> parent)
_start.rightLimit = rightLimit();
} break;
case QEvent::MouseButtonRelease: {
_xPercentageLimitsChange.fire({
.min = _left->x() / float64(width()),
.max = rect::right(_right) / float64(width()),
});
_start = {};
} break;
}
@@ -150,6 +158,10 @@ ChartWidget::Footer::Footer(not_null<Ui::RpWidget*> parent)
[=] { return width() - _right->width(); });
}
rpl::producer<Limits> ChartWidget::Footer::xPercentageLimitsChange() const {
return _xPercentageLimitsChange.events();
}
ChartWidget::ChartWidget(not_null<Ui::RpWidget*> parent)
: Ui::RpWidget(parent)
, _footer(std::make_unique<Footer>(this)) {
@@ -162,16 +174,40 @@ ChartWidget::ChartWidget(not_null<Ui::RpWidget*> parent)
st::countryRowHeight);
}, _footer->lifetime());
_footer->paintRequest(
) | rpl::start_with_next([=] {
) | rpl::start_with_next([=, limits = Limits{ 0., 1. }] {
auto p = QPainter(_footer.get());
if (_chartData) {
Statistic::PaintLinearChartView(
p,
_chartData,
limits,
_footer->rect());
}
}, _footer->lifetime());
_footer->xPercentageLimitsChange(
) | rpl::start_with_next([=](Limits xPercentageLimits) {
_xPercentageLimits = {
.min = *ranges::lower_bound(
_chartData.xPercentage,
xPercentageLimits.min),
.max = *ranges::lower_bound(
_chartData.xPercentage,
xPercentageLimits.max),
};
const auto startXIndex = _chartData.findStartIndex(
_xPercentageLimits.min);
const auto endXIndex = _chartData.findEndIndex(
startXIndex,
_xPercentageLimits.max);
setHeightLimits(
{
float64(FindMinValue(_chartData, startXIndex, endXIndex)),
float64(FindMaxValue(_chartData, startXIndex, endXIndex)),
},
false);
update();
}, _footer->lifetime());
resize(width(), st::confirmMaxHeight + st::countryRowHeight * 2);
}
@@ -179,17 +215,21 @@ void ChartWidget::setChartData(Data::StatisticalChart chartData) {
_chartData = chartData;
{
_xPercentageLimits = {
.min = _chartData.xPercentage.front(),
.max = _chartData.xPercentage.back(),
};
const auto startXIndex = _chartData.findStartIndex(
_chartData.xPercentage.front());
_xPercentageLimits.min);
const auto endXIndex = _chartData.findEndIndex(
startXIndex,
_chartData.xPercentage.back());
_xPercentageLimits.max);
setHeightLimits(
{
float64(FindMinValue(_chartData, startXIndex, endXIndex)),
float64(FindMaxValue(_chartData, startXIndex, endXIndex)),
},
true);
false);
update();
}
}
@@ -205,6 +245,8 @@ void ChartWidget::paintEvent(QPaintEvent *e) {
const auto chartRect = r
- QMargins{ 0, st::boxTextFont->height, 0, chartRectBottom };
p.fillRect(r, st::boxBg);
for (const auto &horizontalLine : _horizontalLines) {
PaintHorizontalLines(p, horizontalLine, chartRect);
}
@@ -213,6 +255,7 @@ void ChartWidget::paintEvent(QPaintEvent *e) {
Statistic::PaintLinearChartView(
p,
_chartData,
_xPercentageLimits,
chartRect);
}