88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "statistics/view/stack_chart_common.h"
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#include "data/data_statistics_chart.h"
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#include "statistics/statistics_common.h"
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#include "ui/effects/animation_value_f.h"
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namespace Statistic {
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LeftStartAndStep ComputeLeftStartAndStep(
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const Data::StatisticalChart &chartData,
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const Limits &xPercentageLimits,
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const QRect &rect,
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float64 xIndexStart) {
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const auto fullWidth = rect.width()
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/ (xPercentageLimits.max - xPercentageLimits.min);
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const auto offset = fullWidth * xPercentageLimits.min;
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const auto p = (chartData.xPercentage.size() < 2)
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? 1.
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: chartData.xPercentage[1] * fullWidth;
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const auto w = chartData.xPercentage[1] * (fullWidth - p);
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const auto leftStart = rect.x()
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+ chartData.xPercentage[xIndexStart] * (fullWidth - p)
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- offset;
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return { leftStart, w };
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}
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Limits FindStackXIndicesFromRawXPercentages(
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const Data::StatisticalChart &chartData,
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const Limits &rawXPercentageLimits,
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const Limits &zoomedInLimitXIndices) {
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const auto zoomLimit = Limits{
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chartData.xPercentage[zoomedInLimitXIndices.min],
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chartData.xPercentage[zoomedInLimitXIndices.max],
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};
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// Due to a specificity of the stack chart plotting,
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// the right edge has a special offset to the left.
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// This reduces the number of displayed points by 1,
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// but allows the last point to be displayed.
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const auto offset = (zoomLimit.max == 1.) ? 0 : -1;
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const auto rightShrink = (rawXPercentageLimits.max == 1.)
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? ((zoomLimit.max == 1.) ? 0 : 1)
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: 0;
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const auto n = chartData.xPercentage.size();
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auto minIt = -1;
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auto maxIt = n;
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const auto zoomedIn = Limits{
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anim::interpolateF(
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zoomLimit.min,
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zoomLimit.max,
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rawXPercentageLimits.min),
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anim::interpolateF(
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zoomLimit.min,
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zoomLimit.max,
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rawXPercentageLimits.max),
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};
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for (auto i = int(0); i < n; i++) {
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if (minIt < 0) {
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if (chartData.xPercentage[i] > zoomedIn.min) {
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minIt = i;
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}
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}
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if (maxIt >= n) {
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if (chartData.xPercentage[i] > zoomedIn.max) {
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maxIt = i;
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}
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}
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}
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return {
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.min = std::clamp(
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float64(minIt + offset),
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zoomedInLimitXIndices.min,
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zoomedInLimitXIndices.max - rightShrink),
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.max = std::clamp(
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float64(maxIt + offset),
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zoomedInLimitXIndices.min,
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zoomedInLimitXIndices.max - rightShrink),
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};
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}
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} // namespace Statistic
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