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// SPDX-License-Identifier: GPL-2.0
#include "barseries.h"
#include "informationbox.h"
#include "statscolors.h"
#include "statshelper.h"
#include "statstranslations.h"
#include "statsview.h"
#include "zvalues.h"
#include <math.h> // for lrint()
#include <QLocale>
// Constants that control the bar layout
static const double barWidth = 0.8; // 1.0 = full width of category
static const double subBarWidth = 0.9; // For grouped bar charts
static const double barBorderWidth = 1.0;
// Default constructor: invalid index.
BarSeries::Index::Index() : bar(-1), subitem(-1)
{
}
BarSeries::Index::Index(int bar, int subitem) : bar(bar), subitem(subitem)
{
}
bool BarSeries::Index::operator==(const Index &i2) const
{
return std::tie(bar, subitem) == std::tie(i2.bar, i2.subitem);
}
BarSeries::BarSeries(StatsView &view, StatsAxis *xAxis, StatsAxis *yAxis,
bool horizontal, bool stacked, const QString &categoryName,
const StatsVariable *valueVariable, std::vector<QString> valueBinNames) :
StatsSeries(view, xAxis, yAxis),
horizontal(horizontal), stacked(stacked), categoryName(categoryName),
valueVariable(valueVariable), valueBinNames(std::move(valueBinNames))
{
}
BarSeries::BarSeries(StatsView &view, StatsAxis *xAxis, StatsAxis *yAxis,
bool horizontal, const QString &categoryName,
const std::vector<CountItem> &items) :
BarSeries(view, xAxis, yAxis, horizontal, false, categoryName, nullptr, std::vector<QString>())
{
for (const CountItem &item: items) {
StatsOperationResults res;
res.count = item.count;
double value = item.count;
add_item(item.lowerBound, item.upperBound, makeSubItems(value, item.label),
item.binName, res, item.total, horizontal, stacked);
}
}
BarSeries::BarSeries(StatsView &view, StatsAxis *xAxis, StatsAxis *yAxis,
bool horizontal, const QString &categoryName, const StatsVariable *valueVariable,
const std::vector<ValueItem> &items) :
BarSeries(view, xAxis, yAxis, horizontal, false, categoryName, valueVariable, std::vector<QString>())
{
for (const ValueItem &item: items) {
add_item(item.lowerBound, item.upperBound, makeSubItems(item.value, item.label),
item.binName, item.res, -1, horizontal, stacked);
}
}
BarSeries::BarSeries(StatsView &view, StatsAxis *xAxis, StatsAxis *yAxis,
bool horizontal, bool stacked, const QString &categoryName, const StatsVariable *valueVariable,
std::vector<QString> valueBinNames,
const std::vector<MultiItem> &items) :
BarSeries(view, xAxis, yAxis, horizontal, stacked, categoryName, valueVariable, std::move(valueBinNames))
{
for (const MultiItem &item: items) {
StatsOperationResults res;
std::vector<std::pair<double, std::vector<QString>>> valuesLabels;
valuesLabels.reserve(item.countLabels.size());
int total = 0;
for (auto &[count, label]: item.countLabels) {
valuesLabels.push_back({ static_cast<double>(count), std::move(label) });
total += count;
}
add_item(item.lowerBound, item.upperBound, makeSubItems(valuesLabels),
item.binName, res, total, horizontal, stacked);
}
}
BarSeries::~BarSeries()
{
}
BarSeries::BarLabel::BarLabel(StatsView &view, const std::vector<QString> &labels, int bin_nr, int binCount) :
isOutside(false)
{
QFont f; // make configurable
item = view.createChartItem<ChartTextItem>(ChartZValue::SeriesLabels, f, labels, true);
//highlight(false, bin_nr, binCount);
}
void BarSeries::BarLabel::setVisible(bool visible)
{
item->setVisible(visible);
}
void BarSeries::BarLabel::highlight(bool highlight, int bin_nr, int binCount, const QColor &background)
{
// For labels that are on top of a bar, use the corresponding bar color
// as background. Rendering on a transparent background gives ugly artifacts.
item->setColor(highlight || isOutside ? darkLabelColor : labelColor(bin_nr, binCount),
isOutside ? Qt::transparent : background);
}
void BarSeries::BarLabel::updatePosition(bool horizontal, bool center, const QRectF &rect,
int bin_nr, int binCount, const QColor &background)
{
QSizeF itemSize = item->getRect().size();
if (!horizontal) {
if (itemSize.width() > rect.width()) {
setVisible(false);
return;
}
QPointF pos = rect.center();
pos.rx() -= itemSize.width() / 2.0;
// Heuristics: if the label fits nicely into the bar (bar height is at least twice the label height),
// then put the label in the middle of the bar. Otherwise, put it at the top of the bar.
isOutside = !center && rect.height() < 2.0 * itemSize.height();
if (isOutside) {
pos.ry() = rect.top() - (itemSize.height() + 2.0); // Leave two pixels(?) space
} else {
if (itemSize.height() > rect.height()) {
setVisible(false);
return;
}
pos.ry() -= itemSize.height() / 2.0;
}
item->setPos(roundPos(pos)); // Round to integer to avoid ugly artifacts.
} else {
if (itemSize.height() > rect.height()) {
setVisible(false);
return;
}
QPointF pos = rect.center();
pos.ry() -= itemSize.height() / 2.0;
// Heuristics: if the label fits nicely into the bar (bar width is at least twice the label height),
// then put the label in the middle of the bar. Otherwise, put it to the right of the bar.
isOutside = !center && rect.width() < 2.0 * itemSize.width();
if (isOutside) {
pos.rx() = rect.right() + 2.0; // Leave two pixels(?) space
} else {
if (itemSize.width() > rect.width()) {
setVisible(false);
return;
}
pos.rx() -= itemSize.width() / 2.0;
}
item->setPos(roundPos(pos)); // Round to integer to avoid ugly artifacts.
}
setVisible(true);
// If label changed from inside to outside, or vice-versa, the color might change.
highlight(false, bin_nr, binCount, background);
}
BarSeries::Item::Item(BarSeries *series, double lowerBound, double upperBound,
std::vector<SubItem> subitemsIn,
const QString &binName, const StatsOperationResults &res, int total,
bool horizontal, bool stacked, int binCount) :
lowerBound(lowerBound),
upperBound(upperBound),
subitems(std::move(subitemsIn)),
binName(binName),
res(res),
total(total)
{
for (SubItem &item: subitems)
item.highlight(false, binCount);
updatePosition(series, horizontal, stacked, binCount);
}
void BarSeries::Item::highlight(int subitem, bool highlight, int binCount)
{
if (subitem < 0 || subitem >= (int)subitems.size())
return;
subitems[subitem].highlight(highlight, binCount);
}
void BarSeries::SubItem::highlight(bool highlight, int binCount)
{
fill = highlight ? highlightedColor : binColor(bin_nr, binCount);
QColor border = highlight ? highlightedBorderColor : ::borderColor;
item->setColor(fill, border);
if (label)
label->highlight(highlight, bin_nr, binCount, fill);
}
void BarSeries::Item::updatePosition(BarSeries *series, bool horizontal, bool stacked, int binCount)
{
if (subitems.empty())
return;
int num = stacked ? 1 : binCount;
// barWidth gives the total width of the rod or group of rods.
// subBarWidth gives the the width of each bar in the case of grouped bar charts.
// calculated the group width such that after applying the latter, the former is obtained.
double groupWidth = (upperBound - lowerBound) * barWidth * num / (num - 1 + subBarWidth);
double from = (lowerBound + upperBound - groupWidth) / 2.0;
double to = (lowerBound + upperBound + groupWidth) / 2.0;
double fullSubWidth = (to - from) / num; // width including gap
double subWidth = fullSubWidth * subBarWidth; // width without gap
for (SubItem &item: subitems) {
int idx = stacked ? 0 : item.bin_nr;
double center = (idx + 0.5) * fullSubWidth + from;
item.updatePosition(series, horizontal, stacked, center - subWidth / 2.0, center + subWidth / 2.0, binCount);
}
rect = subitems[0].item->getRect();
for (auto it = std::next(subitems.begin()); it != subitems.end(); ++it)
rect = rect.united(it->item->getRect());
}
void BarSeries::SubItem::updatePosition(BarSeries *series, bool horizontal, bool stacked,
double from, double to, int binCount)
{
QPointF topLeft, bottomRight;
if (horizontal) {
topLeft = series->toScreen(QPointF(value_from, to));
bottomRight = series->toScreen(QPointF(value_to, from));
} else {
topLeft = series->toScreen(QPointF(from, value_to));
bottomRight = series->toScreen(QPointF(to, value_from));
}
QRectF rect(topLeft, bottomRight);
item->setRect(rect);
if (label)
label->updatePosition(horizontal, stacked, rect, bin_nr, binCount, fill);
}
std::vector<BarSeries::SubItem> BarSeries::makeSubItems(const std::vector<std::pair<double, std::vector<QString>>> &values) const
{
std::vector<SubItem> res;
res.reserve(values.size());
double from = 0.0;
int bin_nr = 0;
for (auto &[v, label]: values) {
if (v > 0.0) {
res.push_back({ view.createChartItem<ChartBarItem>(ChartZValue::Series, barBorderWidth, horizontal),
{}, from, from + v, bin_nr });
if (!label.empty())
res.back().label = std::make_unique<BarLabel>(view, label, bin_nr, binCount());
}
if (stacked)
from += v;
++bin_nr;
}
return res;
}
std::vector<BarSeries::SubItem> BarSeries::makeSubItems(double value, const std::vector<QString> &label) const
{
return makeSubItems(std::vector<std::pair<double, std::vector<QString>>>{ { value, label } });
}
int BarSeries::binCount() const
{
return std::max(1, (int)valueBinNames.size());
}
void BarSeries::add_item(double lowerBound, double upperBound, std::vector<SubItem> subitems,
const QString &binName, const StatsOperationResults &res, int total, bool horizontal,
bool stacked)
{
// Don't add empty items, as that messes with the "find item under mouse" routine.
if (subitems.empty())
return;
items.emplace_back(this, lowerBound, upperBound, std::move(subitems), binName, res,
total, horizontal, stacked, binCount());
}
void BarSeries::updatePositions()
{
for (Item &item: items)
item.updatePosition(this, horizontal, stacked, binCount());
}
// Attention: this supposes that items are sorted by position and no bar is inside another bar!
BarSeries::Index BarSeries::getItemUnderMouse(const QPointF &point) const
{
// Search the first item whose "end" position is greater than the cursor position.
auto it = horizontal ? std::lower_bound(items.begin(), items.end(), point.y(),
[] (const Item &item, double y) { return item.rect.top() > y; })
: std::lower_bound(items.begin(), items.end(), point.x(),
[] (const Item &item, double x) { return item.rect.right() < x; });
if (it == items.end() || !it->rect.contains(point))
return Index();
int subitem = it->getSubItemUnderMouse(point, horizontal, stacked);
return subitem >= 0 ? Index{(int)(it - items.begin()), subitem} : Index();
}
// Attention: this supposes that sub items are sorted by position and no subitem is inside another bar!
int BarSeries::Item::getSubItemUnderMouse(const QPointF &point, bool horizontal, bool stacked) const
{
// Search the first item whose "end" position is greater than the cursor position.
bool search_x = horizontal == stacked;
auto it = search_x ? std::lower_bound(subitems.begin(), subitems.end(), point.x(),
[] (const SubItem &item, double x) { return item.item->getRect().right() < x; })
: std::lower_bound(subitems.begin(), subitems.end(), point.y(),
[] (const SubItem &item, double y) { return item.item->getRect().top() > y; });
return it != subitems.end() && it->item->getRect().contains(point) ? it - subitems.begin() : -1;
}
// Format information in a count-based bar chart.
// Essentially, the name of the bin and the number and percentages of dives.
static std::vector<QString> makeCountInfo(const QString &binName, const QString &axisName,
const QString &valueBinName, const QString &valueAxisName,
int count, int total)
{
double percentage = count * 100.0 / total;
QString countString = QString("%L1").arg(count);
QString percentageString = QString("%L1%").arg(percentage, 0, 'f', 1);
QString totalString = QString("%L1").arg(total);
std::vector<QString> res;
res.reserve(3);
res.push_back(QStringLiteral("%1: %2").arg(axisName, binName));
if (!valueAxisName.isEmpty())
res.push_back(QStringLiteral("%1: %2").arg(valueAxisName, valueBinName));
res.push_back(StatsTranslations::tr("%1 (%2 of %3) dives").arg(countString, percentageString, totalString));
return res;
}
// Format information in a value bar chart: the name of the bin and the value with unit.
static std::vector<QString> makeValueInfo(const QString &binName, const QString &axisName,
const StatsVariable &valueVariable, const StatsOperationResults &values)
{
QLocale loc;
int decimals = valueVariable.decimals();
QString unit = valueVariable.unitSymbol();
std::vector<StatsOperation> operations = valueVariable.supportedOperations();
std::vector<QString> res;
res.reserve(operations.size() + 3);
res.push_back(QStringLiteral("%1: %2").arg(axisName, binName));
res.push_back(QStringLiteral("%1: %2").arg(StatsTranslations::tr("Count"), loc.toString(values.count)));
res.push_back(QStringLiteral("%1: ").arg(valueVariable.name()));
for (StatsOperation op: operations) {
QString valueFormatted = loc.toString(values.get(op), 'f', decimals);
res.push_back(QString(" %1: %2 %3").arg(StatsVariable::operationName(op), valueFormatted, unit));
}
return res;
}
std::vector<QString> BarSeries::makeInfo(const Item &item, int subitem_idx) const
{
if (!valueBinNames.empty() && valueVariable) {
if (subitem_idx < 0 || subitem_idx >= (int)item.subitems.size())
return {};
const SubItem &subitem = item.subitems[subitem_idx];
if (subitem.bin_nr < 0 || subitem.bin_nr >= (int)valueBinNames.size())
return {};
int count = (int)lrint(subitem.value_to - subitem.value_from);
return makeCountInfo(item.binName, categoryName, valueBinNames[subitem.bin_nr],
valueVariable->name(), count, item.total);
} else if (valueVariable) {
return makeValueInfo(item.binName, categoryName, *valueVariable, item.res);
} else {
return makeCountInfo(item.binName, categoryName, QString(), QString(), item.res.count, item.total);
}
}
// Highlight item when hovering over item
bool BarSeries::hover(QPointF pos)
{
Index index = getItemUnderMouse(pos);
if (index == highlighted) {
if (information)
information->setPos(pos);
return index.bar >= 0;
}
unhighlight();
highlighted = index;
// Highlight new item (if any)
if (highlighted.bar >= 0 && highlighted.bar < (int)items.size()) {
Item &item = items[highlighted.bar];
item.highlight(index.subitem, true, binCount());
if (!information)
information = view.createChartItem<InformationBox>();
information->setText(makeInfo(item, highlighted.subitem), pos);
information->setVisible(true);
} else {
information->setVisible(false);
}
return highlighted.bar >= 0;
}
void BarSeries::unhighlight()
{
if (highlighted.bar >= 0 && highlighted.bar < (int)items.size())
items[highlighted.bar].highlight(highlighted.subitem, false, binCount());
highlighted = Index();
}
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