SelectionChanged イベントが発生したときに実行するコマンドを指定できる必要があります。ICommandSource インターフェイスの実装方法は既に知っています。私が知る必要があるのは、SelectionChanged イベントを処理するコマンドを列シリーズに追加する方法です。
ColumnBarBaseSeries<...> 基本クラスから継承する場合、実装方法がわからない GetAxes() と UpdateDatePoint() をオーバーライドする必要があります。
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2922 次
3 に答える
2
アタッチされた動作を使用して、この問題を解決できます。
動作をアタッチする要素に selectionChanged イベントを関連付ける SelectionChangedBehaviour を作成すると、任意の ICommand をその動作にバインドできます。
添付された動作の詳細については -
それが役立つことを願っています
于 2009-07-06T14:28:13.293 に答える
1
SelectionChanged コマンドの ColumnSeries にアタッチされた動作を追加するコードを次に示します。
public static class ColumnSeriesBehavior
{
private static DelegateCommand<object> SelectionChangedCommand;
public static DelegateCommand<object> GetSelectionChangedCommand(ColumnSeries cs)
{
return cs.GetValue(SelectionChangedCommandProperty) as DelegateCommand<object>;
}
public static void SetSelectionChangedCommand(ColumnSeries cs, DelegateCommand<object> value)
{
cs.SetValue(SelectionChangedCommandProperty, value);
}
// Using a DependencyProperty as the backing store for SelectionChangedCommand. This enables animation, styling, binding, etc...
public static readonly DependencyProperty SelectionChangedCommandProperty =
DependencyProperty.RegisterAttached("SelectionChangedCommand", typeof(DelegateCommand<object>), typeof(ColumnSeriesBehavior), new UIPropertyMetadata(null, OnSelectionChangedCommandChanged));
private static void OnSelectionChangedCommandChanged(
DependencyObject depObj, DependencyPropertyChangedEventArgs e)
{
ColumnSeries item = depObj as ColumnSeries;
if (item == null)
{
return;
}
if (e.NewValue is DelegateCommand<object> == false)
{
return;
}
SelectionChangedCommand = e.NewValue as DelegateCommand<object>;
item.SelectionChanged += new System.Windows.Controls.SelectionChangedEventHandler(Column_SelectionChanged);
}
private static void Column_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
{
if (SelectionChangedCommand != null)
SelectionChangedCommand.Execute(sender);
}
}
XAML でプロパティをアタッチします。
<chartingToolkit:Chart.Series>
<chartingToolkit:ColumnSeries
IsSelectionEnabled="True"
ItemsSource="{Binding YourItemSource}"
IndependentValueBinding="{Binding YourIndValue, Path=YourIndValuePath}"
DependentValueBinding="{Binding YourDepValue, Path=YourDepValuePath}"
>
<chartingToolkit:ColumnSeries.Style>
<Style>
<!-- Attaching the SelectionChangedCommand behavior -->
<Setter Property="local:ColumnSeriesBehavior.SelectionChangedCommand"
Value="{Binding YourDelegateCommand}"/>
</Style>
</chartingToolkit:ColumnSeries.Style>
</chartingToolkit:ColumnSeries>
</chartingToolkit:Chart.Series>
于 2009-07-06T16:06:21.087 に答える
0
これが私があなた自身のCommandColumnSeriesを実装するために働くように見えるいくつかのコードです、私はColumnSeriesシールドクラスのソースからそれの多くを盗みました：
public class CommandColumnSeries : ColumnBarBaseSeries<ColumnDataPoint>
{
#region "ICommandSource"
[Localizability(LocalizationCategory.NeverLocalize), Category("Action"), Bindable(true)]
public ICommand Command
{
get
{
return (ICommand)base.GetValue(CommandProperty);
}
set
{
base.SetValue(CommandProperty, value);
}
}
[Bindable(true), Category("Action"), Localizability(LocalizationCategory.NeverLocalize)]
public object CommandParameter
{
get
{
return base.GetValue(CommandParameterProperty);
}
set
{
base.SetValue(CommandParameterProperty, value);
}
}
[Category("Action"), Bindable(true)]
public IInputElement CommandTarget
{
get
{
return (IInputElement)base.GetValue(CommandTargetProperty);
}
set
{
base.SetValue(CommandTargetProperty, value);
}
}
public static readonly DependencyProperty CommandParameterProperty = DependencyProperty.Register("CommandParameter", typeof(object), typeof(CommandColumnSeries), new FrameworkPropertyMetadata(null));
public static readonly DependencyProperty CommandProperty = DependencyProperty.Register("Command", typeof(ICommand), typeof(CommandColumnSeries), new FrameworkPropertyMetadata(null));
public static readonly DependencyProperty CommandTargetProperty = DependencyProperty.Register("CommandTarget", typeof(IInputElement), typeof(CommandColumnSeries), new FrameworkPropertyMetadata(null));
#endregion
#region public IRangeAxis DependentRangeAxis
/// <summary>
/// Gets or sets the dependent range axis.
/// </summary>
public IRangeAxis DependentRangeAxis
{
get { return GetValue(DependentRangeAxisProperty) as IRangeAxis; }
set { SetValue(DependentRangeAxisProperty, value); }
}
/// <summary>
/// Identifies the DependentRangeAxis dependency property.
/// </summary>
[SuppressMessage("Microsoft.Design", "CA1000:DoNotDeclareStaticMembersOnGenericTypes", Justification = "This member is necessary because the base classes need to share this dependency property.")]
public static readonly DependencyProperty DependentRangeAxisProperty =
DependencyProperty.Register(
"DependentRangeAxis",
typeof(IRangeAxis),
typeof(ColumnSeries),
new PropertyMetadata(null, OnDependentRangeAxisPropertyChanged));
/// <summary>
/// DependentRangeAxisProperty property changed handler.
/// </summary>
/// <param name="d">ColumnBarBaseSeries that changed its DependentRangeAxis.</param>
/// <param name="e">Event arguments.</param>
private static void OnDependentRangeAxisPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CommandColumnSeries source = (CommandColumnSeries)d;
IRangeAxis newValue = (IRangeAxis)e.NewValue;
source.OnDependentRangeAxisPropertyChanged(newValue);
}
/// <summary>
/// DependentRangeAxisProperty property changed handler.
/// </summary>
/// <param name="newValue">New value.</param>
private void OnDependentRangeAxisPropertyChanged(IRangeAxis newValue)
{
this.InternalDependentAxis = (IAxis)newValue;
}
#endregion public IRangeAxis DependentRangeAxis
#region public IAxis IndependentAxis
/// <summary>
/// Gets or sets the independent category axis.
/// </summary>
public IAxis IndependentAxis
{
get { return GetValue(IndependentAxisProperty) as IAxis; }
set { SetValue(IndependentAxisProperty, value); }
}
/// <summary>
/// Identifies the IndependentAxis dependency property.
/// </summary>
[SuppressMessage("Microsoft.Design", "CA1000:DoNotDeclareStaticMembersOnGenericTypes", Justification = "This member is necessary because the base classes need to share this dependency property.")]
public static readonly DependencyProperty IndependentAxisProperty =
DependencyProperty.Register(
"IndependentAxis",
typeof(IAxis),
typeof(ColumnSeries),
new PropertyMetadata(null, OnIndependentAxisPropertyChanged));
/// <summary>
/// IndependentAxisProperty property changed handler.
/// </summary>
/// <param name="d">ColumnBarBaseSeries that changed its IndependentAxis.</param>
/// <param name="e">Event arguments.</param>
private static void OnIndependentAxisPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CommandColumnSeries source = (CommandColumnSeries)d;
IAxis newValue = (IAxis)e.NewValue;
source.OnIndependentAxisPropertyChanged(newValue);
}
/// <summary>
/// IndependentAxisProperty property changed handler.
/// </summary>
/// <param name="newValue">New value.</param>
private void OnIndependentAxisPropertyChanged(IAxis newValue)
{
this.InternalIndependentAxis = (IAxis)newValue;
}
#endregion public IAxis IndependentAxis
public CommandColumnSeries()
{
this.SelectionChanged += new SelectionChangedEventHandler(CommandColumnSeries_SelectionChanged);
}
private void CommandColumnSeries_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
{
if (Command != null)
{
RoutedCommand routedCommand = Command as RoutedCommand;
CommandParameter = e.Source;
if (routedCommand != null)
{
routedCommand.Execute(CommandParameter, CommandTarget);
}
else
{
Command.Execute(CommandParameter);
}
}
}
protected override void GetAxes(DataPoint firstDataPoint)
{
// Taken from the source of the ColumnSeries sealed class.
GetAxes(
firstDataPoint,
(axis) => axis.Orientation == AxisOrientation.X,
() => new CategoryAxis { Orientation = AxisOrientation.X },
(axis) =>
{
IRangeAxis rangeAxis = axis as IRangeAxis;
return rangeAxis != null && rangeAxis.Origin != null && axis.Orientation == AxisOrientation.Y;
},
() =>
{
IRangeAxis rangeAxis = CreateRangeAxisFromData(firstDataPoint.DependentValue);
rangeAxis.Orientation = AxisOrientation.Y;
if (rangeAxis == null || rangeAxis.Origin == null)
{
throw new InvalidOperationException("No Suitable Axes found for plotting range axis.");
}
DisplayAxis axis = rangeAxis as DisplayAxis;
if (axis != null)
{
axis.ShowGridLines = true;
}
return rangeAxis;
});
}
protected override void UpdateDataPoint(DataPoint dataPoint)
{
// This code taken from the ColumnSeries sealed class.
if (SeriesHost == null )//|| PlotArea == null)
{
return;
}
object category = dataPoint.ActualIndependentValue ?? (IndexOf<DataPoint>(this.ActiveDataPoints, dataPoint) + 1);
Range<UnitValue> coordinateRange = GetCategoryRange(category);
if (!coordinateRange.HasData)
{
return;
}
else if (coordinateRange.Maximum.Unit != Unit.Pixels || coordinateRange.Minimum.Unit != Unit.Pixels)
{
throw new InvalidOperationException("This Series Does Not Support Radial Axes");
}
double minimum = (double)coordinateRange.Minimum.Value;
double maximum = (double)coordinateRange.Maximum.Value;
double plotAreaHeight = ActualDependentRangeAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Range.Maximum).Value.Value;
IEnumerable<CommandColumnSeries> columnSeries = SeriesHost.Series.OfType<CommandColumnSeries>().Where(series => series.ActualIndependentAxis == ActualIndependentAxis);
int numberOfSeries = columnSeries.Count();
double coordinateRangeWidth = (maximum - minimum);
double segmentWidth = coordinateRangeWidth * 0.8;
double columnWidth = segmentWidth / numberOfSeries;
int seriesIndex = IndexOf<CommandColumnSeries>(columnSeries, this);
double dataPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(ToDouble(dataPoint.ActualDependentValue)).Value.Value;
double zeroPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Origin).Value.Value;
double offset = seriesIndex * Math.Round(columnWidth) + coordinateRangeWidth * 0.1;
double dataPointX = minimum + offset;
if (GetIsDataPointGrouped(category))
{
// Multiple DataPoints share this category; offset and overlap them appropriately
IGrouping<object, DataPoint> categoryGrouping = GetDataPointGroup(category);
int index = GroupIndexOf(categoryGrouping, dataPoint);
dataPointX += (index * (columnWidth * 0.2)) / (categoryGrouping.Count() - 1);
columnWidth *= 0.8;
Canvas.SetZIndex(dataPoint, -index);
}
if (CanGraph(dataPointY) && CanGraph(dataPointX) && CanGraph(zeroPointY))
{
double left = Math.Round(dataPointX);
double width = Math.Round(columnWidth);
double top = Math.Round(plotAreaHeight - Math.Max(dataPointY, zeroPointY) + 0.5);
double bottom = Math.Round(plotAreaHeight - Math.Min(dataPointY, zeroPointY) + 0.5);
double height = bottom - top + 1;
Canvas.SetLeft(dataPoint, left);
Canvas.SetTop(dataPoint, top);
dataPoint.Width = width;
dataPoint.Height = height;
}
}
private static int IndexOf<T>(IEnumerable<T> collection, T target)
{
int i = 0;
foreach (var obj in collection)
{
if (obj.Equals(target))
return i;
i++;
}
return -1;
}
private static int GroupIndexOf(IGrouping<object, DataPoint> group, DataPoint point)
{
int i = 0;
foreach (var pt in group)
{
if (pt == point)
return i;
i++;
}
return -1;
}
/// <summary>
/// Returns a value indicating whether this value can be graphed on a
/// linear axis.
/// </summary>
/// <param name="value">The value to evaluate.</param>
/// <returns>A value indicating whether this value can be graphed on a
/// linear axis.</returns>
private static bool CanGraph(double value)
{
return !double.IsNaN(value) && !double.IsNegativeInfinity(value) && !double.IsPositiveInfinity(value) && !double.IsInfinity(value);
}
/// <summary>
/// Converts an object into a double.
/// </summary>
/// <param name="value">The value to convert to a double.</param>
/// <returns>The converted double value.</returns>
private static double ToDouble(object value)
{
return Convert.ToDouble(value, CultureInfo.InvariantCulture);
}
}
于 2009-07-06T15:10:15.707 に答える