public override void PrepareGroupStyles(PlotGroupStyleCollection externalGroups, IPlotArea layer)
{
Processed2DPlotData pdata = GetRangesAndPoints(layer);
if (null == _localGroups)
{
_localGroups = new PlotGroupStyleCollection()
{
ParentObject = this
}
}
;
using (var suspendToken = _localGroups.SuspendGetToken())
{
_localGroups.Clear();
// first add missing local group styles
_plotStyles.CollectLocalGroupStyles(externalGroups, _localGroups);
// for the newly created group styles BeginPrepare must be called
_localGroups.BeginPrepare();
// now prepare the groups
_plotStyles.PrepareGroupStyles(externalGroups, _localGroups, layer, pdata);
// for the group styles in the local group, PrepareStep and EndPrepare must be called,
_localGroups.PrepareStep();
_localGroups.EndPrepare();
suspendToken.ResumeSilently(); // we are not interested in changes in the _localGroup
}
}
public override void ApplyGroupStyles(PlotGroupStyleCollection externalGroups)
{
using (var suspendToken = _localGroups.SuspendGetToken())
{
// for externalGroups, BeginApply was called already in the PlotItemCollection, for localGroups it has to be called here
_localGroups.BeginApply();
_plotStyles.ApplyGroupStyles(externalGroups, _localGroups);
// for externalGroups, EndApply is called later in the PlotItemCollection, for localGroups it has to be called here
_localGroups.EndApply();
suspendToken.ResumeSilently(); // we are not interested in changes in the _localGroup
}
}