1 files changed, 155 insertions, 0 deletions
diff --git a/src/charts/TimeChart.cpp b/src/charts/TimeChart.cpp
new file mode 100644
index 0000000..c6a60b9
--- /dev/null
+++ b/src/charts/TimeChart.cpp
@@ -0,0 +1,155 @@
+#include "TimeChart.h"
+#include "ChartScene.h"
+#include "DataPoint.h"
+
+const QList<int> TimeChart::TimeUnits = QList<int>() <<
+    1 << 7 << 30 << 92 << 183;
+
+TimeChart::TimeChart()
+{
+}
+
+void TimeChart::setDates(const QList<QDateTime>& dates, int period,
+    int dataDirection)
+{
+    this->dates = dates;
+    scene->setDataDirection(dataDirection);
+    TimeUnit timeUnit = findTimeUnit(period);
+    QDate thisIntervalStart = getIntervalStart(QDate::currentDate(), timeUnit);
+    QList<DataPoint> dataSet;
+    int pointsNum = getDataPointsNum(period, timeUnit);
+    for(int i = 0; i < pointsNum; i++)
+        dataSet.append(createDataPoint(thisIntervalStart, timeUnit, i));
+    scene->setDataSet(dataSet, getTicksInterval(pointsNum));
+}
+
+int TimeChart::getDataPointsNum(int period, TimeUnit timeUnit)
+{
+    return period / TimeUnits.at(timeUnit);
+}
+
+int TimeChart::getTicksInterval(int pointsNum)
+{
+    int ticksInterval = 1;
+    while(pointsNum / ticksInterval > MaxXTicks)
+        ticksInterval *= 2;
+    return ticksInterval;
+}
+
+TimeChart::TimeUnit TimeChart::findTimeUnit(int period)
+{
+    for(int unit = Day; unit < (int)TimeUnitsNum; unit++)
+        if(getDataPointsNum(period, (TimeUnit)unit) <= MaxDataPoints)
+            return (TimeUnit)unit;
+    return HalfYear;
+}
+
+QDate TimeChart::getIntervalStart(const QDate& date, TimeUnit timeUnit)
+{
+    switch(timeUnit)
+    {
+    case Day:
+        return date;
+    case Week:
+        return date.addDays(-date.dayOfWeek() + 1);
+    case Month:
+        return QDate(date.year(), date.month(), 1);
+    case Quarter:
+        return getQuarterStart(date);
+    case HalfYear:
+        return getHalfYearStart(date);
+    default:
+        return date;
+    }
+}
+
+QDate TimeChart::getQuarterStart(const QDate& date)
+{
+    const int quarterLen = 3;
+    int quarter = (date.month() - 1) / quarterLen;
+    int startMonth = quarter * quarterLen + 1;
+    return QDate(date.year(), startMonth, 1);
+}
+
+QDate TimeChart::getHalfYearStart(const QDate& date)
+{
+    const int secondHalfStart = 7;
+    int startMonth = date.month() < secondHalfStart ? 1 : secondHalfStart;
+    return QDate(date.year(), startMonth, 1);
+}
+
+QDate TimeChart::getInterval(const QDate& start, TimeUnit timeUnit,
+    int num)
+{
+    switch(timeUnit)
+    {
+    case Day:
+        return start.addDays(num);
+    case Week:
+        return start.addDays(7 * num);
+    case Month:
+        return start.addMonths(num);
+    case Quarter:
+        return start.addMonths(3 * num);
+    case HalfYear:
+        return start.addMonths(6 * num);
+    default:
+        return start;
+    }
+}
+
+QDate TimeChart::getIntervalEnd(const QDate& start, TimeUnit timeUnit)
+{
+    return getInterval(start, timeUnit, 1).addDays(-1);
+}
+
+DataPoint TimeChart::createDataPoint(const QDate& thisIntervalStart, TimeUnit timeUnit,
+    int intervalIndex)
+{
+    QDate startDate = getInterval(thisIntervalStart, timeUnit,
+        scene->getDataDirection() * intervalIndex);
+    QDate endDate = getIntervalEnd(startDate, timeUnit);
+    QString xLabel = getDateLabel(startDate, timeUnit);
+    int value = getCardsNumForDate(startDate, endDate);
+    QString toolTipLabel = getIntervalLabel(startDate, endDate, timeUnit);
+    return DataPoint(xLabel, value, toolTipLabel);
+}
+
+QString TimeChart::getDateLabel(const QDate& date, TimeUnit timeUnit)
+{
+    return date.toString(getIntervalFormat(timeUnit));
+}
+
+QString TimeChart::getIntervalFormat(TimeUnit timeUnit)
+{
+    switch(timeUnit)
+    {
+    case Day:
+    case Week:
+        return "dd.MM";
+    case Month:
+    case Quarter:
+    case HalfYear:
+        return "MM/yy";
+    default:
+        return "dd.MM";
+    }
+}
+
+QString TimeChart::getIntervalLabel(const QDate& startDate,
+    const QDate& endDate, TimeUnit timeUnit)
+{
+    QString startLabel = getDateLabel(startDate, timeUnit);
+    if(timeUnit == Day || timeUnit == Month)
+        return startLabel;
+    return startLabel + " - " + getDateLabel(endDate, timeUnit);
+}
+
+int TimeChart::getCardsNumForDate(const QDate& startDate, const QDate& endDate)
+{
+    int cardsNum = 0;
+    foreach(QDateTime date, dates)
+        if(date.date() >= startDate && date.date() <= endDate)
+            cardsNum++;
+    return cardsNum;
+}