グループ化

CollectionView クラスは、.NET と類似の ICollectionView インタフェースを介してグループ化をサポートしています。グループ化を有効にするには、1 つ以上の GroupDescription オブジェクトを CollectionView.GroupDescription プロパティに追加します。GroupDescription オブジェクトは柔軟であり、値またはグループ化関数に基づいてデータをグループ化できます。次のコードは GroupChanged イベントと SortChanged イベントを使用して、Sunburst チャートでグループ化操作を実行します。

次の図は、Sunburst チャートコントロールでグループ化を設定する方法を示します。

次のコード例は、C# と XAML を使用してこれらのプロパティを設定する方法を示します。この例では、「クイックスタート」セクションで作成したデータを使用します。

CS	コードのコピー
public partial class ViewController : UIViewController { private C1CollectionView<Item> cv; public ViewController(IntPtr handle) : base(handle) { } public override void ViewDidLoad() { base.ViewDidLoad(); sunburst = new C1Sunburst(); sunburst.Binding = "Value"; sunburst.BindingName = "Year,Quarter,Month"; sunburst.ToolTipContent = "{}{name}\n{y}"; sunburst.DataLabel.Position = PieLabelPosition.Center; sunburst.DataLabel.Content = "{}{name}"; cv = DataService.CreateGroupCVData(); this.Add(sunburst); cv.GroupChanged += View_GroupChanged; cv.SortChanged += Cv_SortChanged; SortDescription yearSortDescription = new SortDescription("Year", SortDirection.Ascending); SortDescription quarterSortDescription = new SortDescription("Quarter", SortDirection.Ascending); SortDescription monthSortDescription = new SortDescription("MonthValue", SortDirection.Ascending); SortDescription[] sortDescriptions = new SortDescription[] { yearSortDescription, quarterSortDescription, monthSortDescription }; cv.SortAsync(sortDescriptions); } private void Cv_SortChanged(object sender, System.EventArgs e) { GroupDescription yearGroupDescription = new GroupDescription("Year"); GroupDescription quarterGroupDescription = new GroupDescription("Quarter"); GroupDescription monthGroupDescription = new GroupDescription("MonthName"); GroupDescription[] groupDescriptions = new GroupDescription[] { yearGroupDescription, quarterGroupDescription, monthGroupDescription }; cv.GroupAsync(groupDescriptions); } private void View_GroupChanged(object sender, System.EventArgs e) { this.sunburst.ItemsSource = cv; CGRect rect = new CGRect(this.View.Frame.X, this.View.Frame.Y + 80, this.View.Frame.Width, this.View.Frame.Height - 80); sunburst.Frame = new CGRect(rect.X, rect.Y, rect.Width, rect.Height - 10); } public override void ViewDidLayoutSubviews() { base.ViewDidLayoutSubviews(); sunburst.Frame = new CGRect(this.View.Frame.X, this.View.Frame.Y, this.View.Frame.Width, this.View.Frame.Height); }

コードのコピー

public partial class ViewController : UIViewController
    {
        private C1CollectionView<Item> cv;
        public ViewController(IntPtr handle) : base(handle)
        {
        }
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            sunburst = new C1Sunburst();
            sunburst.Binding = "Value";
            sunburst.BindingName = "Year,Quarter,Month";
            sunburst.ToolTipContent = "{}{name}\n{y}";
            sunburst.DataLabel.Position = PieLabelPosition.Center;
            sunburst.DataLabel.Content = "{}{name}";
            cv = DataService.CreateGroupCVData();
            this.Add(sunburst);

            cv.GroupChanged += View_GroupChanged;
            cv.SortChanged += Cv_SortChanged;

            SortDescription yearSortDescription = new SortDescription("Year", SortDirection.Ascending);
            SortDescription quarterSortDescription = new SortDescription("Quarter", SortDirection.Ascending);
            SortDescription monthSortDescription = new SortDescription("MonthValue", SortDirection.Ascending);
            SortDescription[] sortDescriptions = new SortDescription[] { yearSortDescription, quarterSortDescription, monthSortDescription };
            cv.SortAsync(sortDescriptions);
        }
        private void Cv_SortChanged(object sender, System.EventArgs e)
        {
            GroupDescription yearGroupDescription = new GroupDescription("Year");
            GroupDescription quarterGroupDescription = new GroupDescription("Quarter");
            GroupDescription monthGroupDescription = new GroupDescription("MonthName");
            GroupDescription[] groupDescriptions = new GroupDescription[] { yearGroupDescription, quarterGroupDescription, monthGroupDescription };
            cv.GroupAsync(groupDescriptions);
        }

        private void View_GroupChanged(object sender, System.EventArgs e)
        {
            this.sunburst.ItemsSource = cv;
            CGRect rect = new CGRect(this.View.Frame.X, this.View.Frame.Y + 80,
                                     this.View.Frame.Width, this.View.Frame.Height - 80);

            sunburst.Frame = new CGRect(rect.X, rect.Y, rect.Width, rect.Height - 10);
        }
        public override void ViewDidLayoutSubviews()
        {
            base.ViewDidLayoutSubviews();

            sunburst.Frame = new CGRect(this.View.Frame.X, this.View.Frame.Y,
                                     this.View.Frame.Width, this.View.Frame.Height);
        }