/// <summary>
/// Common logic for leaving the chart.
/// SHOULD be strict dual of ComponentEnter sequence.
/// </summary>
/// <param name="icelc">The context.</param>
/// <param name="cc">The component leaving chart.</param>
protected void ComponentLeave(IChartEnterLeaveContext icelc, ChartComponent cc)
{
foreach (var px in AllPhases)
{
px.Leave(cc);
}
if (cc is IProvideDataSourceRenderer ipdsr)
{
Unregister(ipdsr.Renderer);
}
else if (cc is IDataSourceRenderer idsr)
{
Unregister(idsr);
}
if (cc is IChartAxis ica)
{
Axes.Remove(ica);
}
if (cc is IProvideLegendDynamic ipld)
{
// detach the event
ipld.LegendChanged -= Ipld_LegendChanged;
}
if (cc is IProvideLegend ipl)
{
foreach (var li in ipl.LegendItems)
{
LegendItems.Remove(li);
}
}
if (cc is IRequireEnterLeave irel)
{
irel.Leave(icelc);
}
if (cc is IRequireChartTheme irct)
{
irct.Theme = null;
}
}
/// <summary>
/// Initialize after entering VT.
/// </summary>
/// <param name="icelc"></param>
public void Enter(IChartEnterLeaveContext icelc)
{
EnsureAxes(icelc as IChartComponentContext);
Layer = icelc.CreateLayer();
_trace.Verbose($"enter v:{ValueAxisName}:{ValueAxis} c:{CategoryAxisName}:{CategoryAxis} d:{DataSourceName}");
AssignFromRef(icelc as IChartErrorInfo, NameOrType(), nameof(PathStyle), nameof(Theme.PathMarkerSeries),
PathStyle == null, Theme != null, Theme.PathMarkerSeries != null,
() => PathStyle = Theme.PathMarkerSeries
);
AssignFromRef(icelc as IChartErrorInfo, NameOrType(), nameof(ReversePathStyle), nameof(PathStyle),
ReversePathStyle == null, true, PathStyle != null,
() => ReversePathStyle = PathStyle
);
BindPaths = new Evaluators(CategoryPath, OpenValuePath, HighValuePath, LowValuePath, CloseValuePath, ValueLabelPath);
if (!BindPaths.IsValid)
{
if (icelc is IChartErrorInfo icei)
{
var props = new List <String>();
if (String.IsNullOrEmpty(OpenValuePath))
{
props.Add(nameof(OpenValuePath));
}
if (String.IsNullOrEmpty(HighValuePath))
{
props.Add(nameof(HighValuePath));
}
if (String.IsNullOrEmpty(LowValuePath))
{
props.Add(nameof(LowValuePath));
}
if (String.IsNullOrEmpty(CloseValuePath))
{
props.Add(nameof(CloseValuePath));
}
icei.Report(new ChartValidationResult(NameOrType(), $"{String.Join(",", props)}: must be specified", props));
}
}
}
/// <summary>
/// Reverse effect of Enter.
/// </summary>
/// <param name="icelc">The context.</param>
void IRequireEnterLeave.Leave(IChartEnterLeaveContext icelc)
{
icelc.DeleteLayer(Layer);
Layer = null;
}
/// <summary>
/// Undo effects of Enter().
/// </summary>
/// <param name="icelc"></param>
void IRequireEnterLeave.Leave(IChartEnterLeaveContext icelc)
{
_trace.Verbose($"leave");
icelc.DeleteLayer(Layer);
Layer = null;
}
void DoBindings(IChartEnterLeaveContext icelc)
{
BindTo(this, nameof(PathStyle), Axis, FrameworkElement.StyleProperty);
}
void IRequireEnterLeave.Enter(IChartEnterLeaveContext icelc)
{
EnsureAxes(icelc as IChartComponentContext);
Layer = icelc.CreateLayer();
DoBindings(icelc);
}
/// <summary>
/// Component is entering the chart.
/// </summary>
/// <param name="icelc">Context.</param>
void IRequireEnterLeave.Enter(IChartEnterLeaveContext icelc)
{
Layer = icelc.CreateLayer(Path);
DoBindings(icelc);
}
