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Navigation: Code Documentation > RSChartsDB > RSDBCharts > Classes

TRSChartDataLink Class

Provides a data-aware link for the TRSChart and its descendants. Since this data link is being used in multiple descendants, it does most of the work so that little extra code is written in each chart type. The events are for unexpected uses.

Note
DataFields holds the field names associated with each dimension in the TRSChartValue internal array PLUS one. The last index holds the Caption's FieldName

Notes to Callers
Data-aware charts use the TRSChartDataLink to provide a mapping of data field names to their Values dimension. They should expose properties that allow the user to input dataset field names for each dimension of their TRSChartValue.Values property. These field names would be placed in DataFields property.

Namespace: RSDBCharts

	Name	Description
	ChartFieldCount	Returns the number of chart fields (TFields associated with a chart dimension) plus 1 for Caption.
	ChartFields[Integer]	Returns the DataSet TField associated with the TRSChartValue.Values dimension (Index). The association of TField and Name is specified in the DataFields property.
	DataChanging	Represents property DataChanging.
	DataFields[Integer]	Defines the names of the TRSChartValue.Values dimension
	FieldCount	Returns the number of fields in the DataSet
	Fields[Integer]	Returns a TField for all the fields in the Dataset
	OnActiveChanged	Occurs when the Active property of the TRSChartDataLink changes. Write an OnActiveChange event handler to take specific action immediately after the dataset transitions into or out of an active state. OnActiveChange is particularly useful for updating objects to reflect changes that occurred while the dataset was not active, as the object can not respond to events while its TRSChartDataLink is not Active.
	OnDataSetChanged	Occurs when the dataset changed
	OnGetChartValue	Occurs when the data has changed and the dataset needs a chart value. Use this event to retrieve chart values that cannot be automatically handled by the TRSChartDataLink
	OnLayoutChanged	Occurs after the layout has changed in a way that affects the representation of the dataset.
	Parent	Returns the chart that owns the data link

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	Name	Description
	ActiveChanged	Represents method ActiveChanged.
	DataSetChanged	Represents method DataSetChanged.
	DataSetScrolled(Integer)	Represents method DataSetScrolled(Integer).
	DoActiveChanged	Represents method DoActiveChanged.
	DoDataChanged	Overloaded. Represents method DoDataChanged.
	DoDataChanged(TRSChartValueTypeArray)	Overloaded. Represents method DoDataChanged(TRSChartValueTypeArray).
	DoLayoutChanged	Represents method DoLayoutChanged.
	LayoutChanged	Represents method LayoutChanged.
	RecordChanged(TField)	Represents method RecordChanged(TField).

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	Name	Description
	OnDataSetScrolled	Occurs when the dataset has finished scrolling
	OnRecordChanged	Occurs on changes in the current record or field of the DataSource

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