/// <summary>
/// 返回所有的事件记录中含有比 rect 的日期还要早的记录。
/// </summary>
/// <param name="entries">存储事件链的模型类</param>
/// <param name="rect">用于日期比较的目标方块</param>
/// <returns></returns>
private static List<StatistTotalByDateTime> EarlierThanEarliestRectangle(List<StatistTotalByDateTime> entries, Rectangle rect) {
List<StatistTotalByDateTime> earlierThanEarliestRectangleLik = new List<StatistTotalByDateTime>();
foreach (var item in entries) {
if (item.DateTime < DatetimeParser.ParseExpressToDateTime(rect.Name, DateMode.DateWithSlash)) {
earlierThanEarliestRectangleLik.Add(item);
}
}
return earlierThanEarliestRectangleLik;
}
/// <summary>
/// 筛选出没有在当前 RectanglesCanvas 面板中显示的、日期更久远的记录，
/// 然后根据这些记录在 StackCanvas 面板中生成新的方块面板，接着在这些
/// 新生成的面板中着色日期更久远的记录。
/// </summary>
private void ExtendStackCanvasByFilterOldRecorders(List<StatistTotalByDateTime> oldRecorders, Rectangle earliestRectangle, int canvasOrdinal = 1) {
Canvas oldRectanglesCanvas = new Canvas() {
Name = $"OldRectanglesCanvas_{canvasOrdinal}"
};
Rectangle oldRect = this.RectanglesLayout(oldRectanglesCanvas, DatetimeParser.ParseExpressToDateTime(earliestRectangle.Name, DateMode.DateWithSlash).AddDays(-1));
DateTag(oldRectanglesCanvas);
this.StackCanvas.Children.Insert(0, oldRectanglesCanvas);
List<StatistTotalByDateTime> newOldRecorders = EarlierThanEarliestRectangle(oldRecorders, oldRect);
if (newOldRecorders.Count > 0) {
ExtendStackCanvasByFilterOldRecorders(newOldRecorders, oldRect, canvasOrdinal + 1);
}
}
/// <summary>
/// 给相应的 Rectangle 标记上日期和星期数
/// </summary>
/// <param name="canvas"></param>
private static void DateTag(Canvas canvas) {
/*
* 下面的查询语句用来提取画布中最左侧的一列方块(res1)和最上侧的一行方块(res2)，
* 然后将这些方块标记上星期数和月份
*/
IEnumerable<IGrouping<double, UIElement>> leftGroup = from rect in canvas.Children
group rect by Canvas.GetLeft(rect);
IEnumerable<IGrouping<double, UIElement>> topGroup = from rect in canvas.Children
group rect by Canvas.GetTop(rect);
double minLeftGroupKey = leftGroup.Min(group => group.Key);
double minTopGroupKey = topGroup.Min(group => group.Key);
IGrouping<double, UIElement> res1 = (from g in leftGroup
where g.Key == minLeftGroupKey
select g).First();
IGrouping<double, UIElement> res2 = (from g in topGroup
where g.Key == minTopGroupKey
select g).First();
/*
* 给周一、周三、周五的方块打上标记 Mon、Wed、Fri
*/
foreach (Rectangle rect in res1) {
if (DatetimeParser.ParseExpressToDateTime((rect as Rectangle).Name, DateMode.DateWithSlash).DayOfWeek == DayOfWeek.Monday ||
DatetimeParser.ParseExpressToDateTime((rect as Rectangle).Name, DateMode.DateWithSlash).DayOfWeek == DayOfWeek.Wednesday ||
DatetimeParser.ParseExpressToDateTime((rect as Rectangle).Name, DateMode.DateWithSlash).DayOfWeek == DayOfWeek.Friday) {
var tbx = new TextBlock() {
Text = DatetimeParser.ParseExpressToDateTime((rect as Rectangle).Name, DateMode.DateWithSlash).DayOfWeek.ToString().Substring(0, 3),
FontSize = 10,
Foreground = new SolidColorBrush(Windows.UI.Colors.Gray)
};
Canvas.SetLeft(tbx, Canvas.GetLeft(rect) - 30);
Canvas.SetTop(tbx, Canvas.GetTop(rect));
canvas.Children.Add(tbx);
}
}
/*
* 给每个月份开头的方块打上标记，从 Jan 到 Dec
*/
Rectangle previous = null;
foreach (Rectangle rect in res2.Reverse()) {
void setTopTag(string text) {
var tbx = new TextBlock() {
Text = text,
FontSize = 10,
Foreground = new SolidColorBrush(Windows.UI.Colors.Gray)
};
Canvas.SetLeft(tbx, Canvas.GetLeft(rect));
Canvas.SetTop(tbx, Canvas.GetTop(rect) - 15);
canvas.Children.Add(tbx);
}
if (previous == null) {
setTopTag(DatetimeParser.NumberToMonth(DatetimeParser.ParseExpressToDateTime(rect.Name, DateMode.DateWithSlash).Month));
}
else {
int monthOfPreviousRectangle = DatetimeParser.ParseExpressToDateTime(previous.Name, DateMode.DateWithSlash).Month;
int monthOfCurrentRectangle = DatetimeParser.ParseExpressToDateTime(rect.Name, DateMode.DateWithSlash).Month;
if (monthOfCurrentRectangle != monthOfPreviousRectangle) {
setTopTag(DatetimeParser.NumberToMonth(DatetimeParser.ParseExpressToDateTime(rect.Name, DateMode.DateWithSlash).Month));
}
}
previous = rect;
}
}