Grid3 and Grid4 Equivalents

• Aug 02, 2022
• 34 minutes to read

This topic provides a conversion guide for ExpressQuantumGrid4 equivalents to the following ExpressQuantumGrid3 elements:

Grid control	Summary items
TdxDBGrid Properties Methods Events	TdxDBGridSummaryGroups Properties Methods
	TdxDBGridSummaryGroup Properties Methods Events
Bands
TdxTreeListBand Properties Methods	TdxDBGridSummaryItems Properties Methods
TdxTreeListBands Properties Methods	TdxDBGridSummaryItem Properties Methods Events
Columns	Filter
TdxDBGridColumn Properties Methods Events	TdxDBGridFilter Properties Methods
Nodes/Records
TdxDBGridNode Properties Methods

Grid control

The main difference between versions 3 and 4 of the ExpressQuantumGrid is that the latter is capable of displaying data within multiple Views. ExpressQuantumGrid4 provides different Views (Table, Banded Table and Card Views) for displaying data while ExpressQuantumGrid3 provides just one basic Table View (which can be displayed with or without bands). Most of the TdxDBGrid functionality is now implemented by View objects. Views present data from data fields by means of “items”. An Item represents a column in Table Views and a row in Card Views. Refer to the Views and Items sections for more details.

A data controller represented by the View’s DataController property implements data-aware operations such as loading data, filtering, grouping and calculating summaries. Customizing colors and fonts has been delegated to Style objects and so is implemented now by assigning styles to grid elements.

These changes mean that the multitude of top level properties in the grid have been replaced by a small collection of objects. While these changes provide for a more efficient and extensible product, we recognize that users of ExpressQuantumGrid3 will have initial difficulty in finding the properties required while converting event handlers for ExpressQuantumGrid4 and hence the reason for this topic.

Note

the two technologies are very different so there isn’t always a simple replacement available. While we have tried to cover as many options as possible, the following lists can never be totally complete (you may be using our product in ways we haven’t considered!). If you still have difficulty in replacing your ExpressQuantumGrid3 code because your needs are not covered here, please write to [e-mail] and we will help you.

ExpressQuantumGrid3 members	ExpressQuantumGrid4 equivalents

TdxDBGrid Object

Properties
In TCustomdxDBGrid
DataSetChangedBusy	The View’s DataController.Provider.IsDataSetBusy property.
DefaultFields	Fields in ExpressQuantumGrid4 are not automatically retrieved from a data source. You can use the Retrieve Fields button in the Columns panel of the Component Editor or call the View’s DataController.CreateAllItems method.
Filter	The View’s DataController.Filter and Filtering properties.
GroupColumnCount	The View’s GroupedItemCount property
GroupColumns	The View’s GroupedItems property.
GroupPanelColor	The View’s Styles.GroupByBox property.
GroupPanelFontColor	The View’s Styles.GroupByBox property.
GroupPanelHeight	–;
LockRefresh	The View’s DataController.BeginLocate and EndLocate methods allow you to prevent a grid control from excessive reloading of data when navigating through dataset records. If you need to call the TDataSet.Locate method, enclose this part of the code with BeginLocate and EndLocate. Calling the BeginLocate and EndLocate methods is equivalent to setting the LockRefresh property to True and False respectively.
OptionsBehavior TdxDBGridOptionBehavior = (edgoAnsiSort, edgoAutoCopySelectedToClipboard, edgoAutoSearch, edgoAutoSort, edgoBandButtonClicking, edgoCaseInsensitive, edgoCellMultiSelect, edgoCollapsedReload, edgoDblClick, edgoDragCollapse, edgoDragExpand, edgoDragScroll, edgoEditing, edgoEnterShowEditor, edgoEnterThrough, edgoExtMultiSelect, edgoHeaderButtonClicking, edgoHorzThrough, edgoImmediateEditor, edgoMouseScroll, edgoMultiSelect, edgoMultiSort, edgoSeekDetail, edgoShowHourGlass, edgoStoreToIniFile, edgoStoreToRegistry, edgoTabs, edgoTabThrough, edgoVertThrough);	Equivalents for the various options are described below.
edgoAnsiSort	The dcoAnsiSort option of the View’s DataController.Options property
edgoAutoCopySelectedToClipboard	–;
edgoAutoSearch	The View’s OptionsBehavior.IncSearch and item’s Options.IncSearch properties
edgoAutoSort	The View’s OptionsCustomize.ItemSorting (ColumnSorting in a grid Table View) and item’s Options.Sorting property.
edgoBandButtonClicking	–;
edgoCaseInsensitive	The dcoCaseInsensitive option of the View’s DataController.Options property
edgoCellMultiSelect	–;
edgoCollapsedReload	–;
edgoDblClick	–;
edgoDragCollapse	–;
edgoDragExpand	The View’s OptionsBehavior.DragOpening property.
edgoDragScroll	See the View’s OptionsBehavior.DragFocusing and OptionsBehavior.DragScrolling properties.
edgoEditing	The View’s OptionsData.Editing and item’s Options.Editing properties
edgoEnterShowEditor	–; If end-users are allowed to edit cell values, they can initiate editing of the focused cell by pressing the Enter or Space key, or by typing a new cell value directly.
edgoEnterThrough	The View’s OptionsBehavior.GoToNextCellOnEnter property
edgoExtMultiSelect	End-users are allowed to select multiple records from different groups provided that the OptionsSelection.MultiSelect property is set to True. Setting this property to True is equivalent to enabling both the edgoMultiSelect and edgoExtMultiSelect options in Grid 3.
edgoHeaderButtonClicking	–;
edgoHorzThrough	The View’s OptionsBehavior.FocusCellOnCycle property
edgoImmediateEditor	The View’s OptionsBehavior.ImmediateEditor property.
edgoMouseScroll	–;
edgoMultiSelect	The View’s OptionsSelection.MultiSelect property. Setting this property to True is equivalent to enabling both the edgoMultiSelect and edgoExtMultiSelect options in Grid 3.
edgoMultiSort	–; End-users are allowed to sort the View data by values of multiple columns if the View’s OptionsCustomize.ColumnSorting property is set to True. Setting this property to True is equivalent to enabling both the edgoMultiSort And edgoAutoSort options in Grid 3).
edgoSeekDetail	–;
edgoShowHourGlass	–;
edgoStoreToIniFile	–; See the View’s StoreToIniFile method.
edgoStoreToRegistry	–; See the View’s StoreToRegistry method.
edgoTabs	The View’s OptionsBehavior.FocusCellOnTab property
edgoTabThrough	The View’s OptionsBehavior.FocusCellOnCycle and OptionsBehavior.FocusCellOnTab properties
edgoVertThrough	–;
OptionsCustomize TdxDBGridOptionCustomize = (edgoBandMoving, edgoBandPanelSizing, edgoBandSizing, edgoColumnMoving, edgoColumnSizing, edgoExtCustomizing, edgoFullSizing, edgoHeaderPanelSizing, edgoKeepColumnWidth, edgoNotHideColumn, edgoRowSizing);	Equivalents for the various options are described below.
edgoBandMoving	The Banded Table View’s OptionsCustomize.BandMoving and band’s Options.Moving properties.
edgoBandPanelSizing	–;
edgoBandSizing	The Banded Table View’s OptionsCustomize.BandSizing and the band’s Options.Sizing properties.
edgoColumnMoving	The View’s OptionsCustomize.ItemMoving (OptionsCustomize.ColumnMoving in a grid Table View) and item’s Options.Moving properties.
edgoColumnSizing	The View’s OptionsCustomize.ColumnHorzSizing and column’s Options.HorzSizing properties. See also the OptionsCustomize.ColumnVertSizing and Options.VertSizing properties which are available in Banded Table Views.
edgoExtCustomizing	The (Banded) Table View’s OptionsCustomize.ColumnHiding property.
edgoFullSizing	–;
edgoHeaderPanelSizing	–;
edgoKeepColumnWidth	–;
edgoNotHideColumn	See the View’s OptionsCustomize.ColumnHidingOnGrouping property.
edgoRowSizing	In a Banded Table View, the row height can be adjusted by changing the height of column headers displayed within the bands. To enable this, set the OptionsCustomize.ColumnVertSizing property of a Banded Table View to True.
OptionsDB TdxDBGridOptionDB = (edgoCanAppend, edgoCancelOnExit, edgoCanDelete, edgoCanInsert, edgoCanNavigation, edgoConfirmDelete, edgoLoadAllRecords, edgoPartialLoad, edgoResetColumnFocus, edgoSmartRefresh, edgoSmartReload, edgoSyncSelection, edgoUseBookmarks, edgoUseLocate);	Equivalents for the various options are described below.
edgoCanAppend	The View’s OptionsData.Appending property
edgoCancelOnExit	The View’s OptionsData.CancelOnExit property
edgoCanDelete	The View’s OptionsData.Deleting property
edgoCanInsert	The View’s OptionsData.Inserting property
edgoCanNavigation	The View’s DataController.DataModeController.SyncMode property.
edgoConfirmDelete	The View’s OptionsData.DeletingConfirmation property
edgoLoadAllRecords	By default, ExpressQuantumGrid4 loads all records into memory. To limit the number of records loaded at a time, see the View’s DataController.DataModeController.GridMode property
edgoPartialLoad	You can use the grid mode to limit the number of records loaded into memory at a time. See the View’s DataController.DataModeController.GridMode property
edgoResetColumnFocus	The View’s OptionsBehavior.FocusFirstCellOnNewRecord property
edgoSmartRefresh	The View’s DataController.DataModeController.SmartRefresh property
edgoSmartReload	–;
edgoSyncSelection	The View’s DataController.DataModeController.SyncMode property
edgoUseBookmarks	–;
edgoUseLocate	–; The Locate method is always used if key field names are specified via the View’s DataController.KeyFieldNames property.
OptionsView TdxDBGridOptionView = (edgoAutoCalcPreviewLines, edgoAutoHeaderPanelHeight, edgoAutoWidth, edgoBandHeaderWidth, edgoDrawEndEllipsis, edgoHideFocusRect, edgoHotTrack, edgoIndicator, edgoInvertSelect, edgoPreview, edgoRowAutoHeight, edgoRowSelect, edgoShowButtonAlways, edgoUseBitmap);	Equivalents for the various options are described below.
edgoAutoCalcPreviewLines	The (Banded) Table View’s Preview.AutoHeight property.
edgoAutoHeaderPanelHeight	–;
edgoAutoWidth	The (Banded) Table View’s OptionsView.ColumnAutoWidth property.
edgoBandHeaderWidth	–;
edgoDrawEndEllipsis	The following properties affect ellipsis displaying when clipping occurs: OptionsView.BandHeaderEndEllipsis OptionsView.HeaderEndEllipsis OptionsView.RowCaptionEndEllipsis OptionsView.CellEndEllipsis
edgoHideFocusRect	–;
edgoHotTrack	–;
edgoIndicator	The View’s OptionsView.Indicator property
edgoInvertSelect	The View’s OptionsSelection.InvertSelect property
edgoPreview	The View’s Preview.Visible property
edgoRowAutoHeight	The View’s OptionsView.CellAutoHeight property
edgoRowSelect	The View’s OptionsSelection.CellSelect property
edgoShowButtonAlways	The View’s OptionsView.ShowEditButtons property
edgoUseBitmap	–;
PartialLoad	ExpressQuantumGrid4 does not provide PartialLoad mode. You can use the grid mode to limit the number of records loaded into memory at a time. See the View’s DataController.DataModeController.GridMode property.
PartialLoadBufferCount	ExpressQuantumGrid4 does not provide PartialLoad mode. ExpressQuantumGrid4 provides the grid mode for limiting the number of records loaded into memory at a time. Use the DataController.DataModeController.GridModeBufferCount to specify the buffer size.
ShowGroupPanel	The View’s OptionsView.GroupByBox property
ShowSummaryFooter	The View’s OptionsView.Footer property.
SummaryGroups	All summaries are set via the View’s DataController.Summary property. Summary groups are provided by the Summary.SummaryGroups collection. To create default summary groups, use the Summary.DefaultGroupSummaryItems property.
SummarySeparator	The TcxDataGroupSummaryItems.Separator property.
UseBookmarks	When in grid mode, bookmarks are stored automatically for the selected records and can be accessed via the View’s DataController.GetSelectedBookmark function. When not in grid mode, bookmarks are not stored.
Derived from TCustomdxDBTreeListControl
Columns	The Items property declared in a base View class. Specific View classes provide the Columns (in a Table and Banded Table Views) and Rows properties (in a Card View) as equivalents (the Items collection).
DataLink	–;
DataSource	The View’s DataController.DataSource property in data-aware Views and DataController.CustomDataSource in non data-aware Views.
FocusedField	You can access a focused item (column in a grid Table View or row in a Card View) using the View’s Controller.FocusedItem property. To access the field linked to the item, see the item’s DataBinding.Field property.
GrIndicatorWidth	The View’s OptionsView.IndicatorWidth property.
KeyField	The View’s DataController.KeyFieldNames property.
PreviewFieldName	The View’s Preview.Column property.
PreviewMaxLength	–;
SelectedRows	The View’s DataController.GetSelectedBookmark function (in grid mode only).
SortedColumn	The first element of the SortedItems collection.
SortedColumns	The (Banded) Table View’s SortedItems property.
VisibleColumns	The View’s VisibleItems property. Views publish the VisibleColumns (in Table and Banded Table Views) and VisibleRows (in a Card View) properties and these provide access to the same items as VisibleItems.
Derived from TCustomdxTreeListControl
BandMaxRowCount	–;
BandRowCount	The BandHeaderLineCount property (Banded Table Views only).
Bands	The Bands property (Banded Table Views only).
ColumnCount	The View’s ItemCount property.
DefaultLayout	–;
HeaderMinRowCount	–; See the View’s HeaderHeight property.
HeaderPanelMaxRowCount	–;
HeaderPanelRowCount	To determine the View’s band nesting level, use the View’s Bands.VisibleRowCount property (Banded Table Views only). To create a nested band layout, use a band’s Position.BandIndex property in code or nest bands as necessary, using drag and drop at design or runtime. To collapse nested bands to a single row and prohibit end-users from nesting bands, set the Position.BandIndex property to -1 for all bands, and disable the View’s OptionsCustomize.NestedBands property.
IniFileName	–;
IniSectionName	–;
RegistryPath	–;
SortedColumnCount	The View’s SortedItemCount property.
VisibleColumnCount	The VisibleItemCount property in a base View class. In a grid (Banded) Table View and Card View, you can use the VisibleColumnCount and VisibleRowCount properties respectively.
Derived from TCustomdxTreeList	Note Grid3 provided a treelist control also and the grid itself was based on nodes. Grid4 does not use nodes and the ExpressQuantumTreeList is now a separate product (under development –; Sept 2002).
ArrowsColor	–;
AutoExpandOnSearch	Group rows are always expanded on finding a record during an incremental search.
AutoSearchColor	The View’s Styles.IncSearch property.
BandButtonPushed	–;
BandColor	The Styles.BandHeader property (Banded Table Views only) and the band’s Styles.Header property.
BandFont	The Styles.BandHeader property (Banded Table Views only) and the band’s Styles.Header property.
BandPanelHeight	–;
BorderStyle	–;
Count	–; See the View’s ViewData.Records property to get the collection of all records currently displayed. To know whether a particular record is at the root nesting level, see its Level property.
CustomizingBandListBox	–;
CustomizingForm	The View’s Controller.CustomizationForm property.
CustomizingHeaderListBox	–;
CustomizingPos	The View’s Controller.CustomizationFormBounds property. You can also use the Left, Top, Width and Height properties of the object obtained via the Controller.CustomizationForm property.
CustomizingRowCount	–;
DblClkExpanding	Double-clicking group rows always expands/collapse the corresponding group. The View’s TcxGridTableOptionsBehavior.ExpandMasterRowOnDblClick property allows you to prevent expanding/collapsing of master rows on a double-click event.
DefaultRowHeight	The View’s OptionsView.DataRowHeight property.
DescTextHeight	–;
DownBandIndex	–;
DownBandPushed	–;
DownColumnIndex	–;
DownColumnPushed	–;
DragAbsoluteBandIndex	–;
DragAbsoluteHeaderIndex	–;
DragNode	–;
EditingText	Use the View’s Controller.EditingItem property to access the item (column in a Table View or card in a Card View) being edited. The EditValue property of the item specifies its value. Alternatively you can use the View’s Controller.FocusedRecord.DisplayTexts property to get the text representation of an individual item’s value within the currently focused record.
FixedBandLineColor	The View’s OptionsView.FixedBandSeparatorColor property.
FixedBandLineWidth	The View’s OptionsView.FixedBandSeparatorWidth property.
FocusedAbsoluteIndex	The View’s Controller.FocusedItemIndex property.
FocusedColumn	The View’s Controller.FocusedItem property.
FocusedNode	The View’s Controller.FocusedRecord property.
FocusedNumber	The View’s Controller.FocusedRecord.Index property.
FooterPanelHeight	–;
FooterRowHeight	–;
FooterRowNodeHeight	–;
GridLineColor	The View’s OptionsView.GridLineColor property.
GroupNodeColor	The View’s Styles.Group property.
GroupNodeTextColor	The View’s Styles.Group property.
HeaderButtonPushed	–;
HeaderColor	The View’s Styles.Header and the column’s Styles.Header properties
HeaderFont	The View’s Styles.Header and the column’s Styles.Header properties
HeaderHeight	The View’s HeaderHeight property.
HeaderPanelHeight	The View’s HeaderHeight property.
HeaderRowHeight	–;
HideFocusRect	The View’s OptionsSelection.HideFocusRect property.
HideSelection	The View’s OptionsSelection.HideSelection property.
HideSelectionColor	The View’s Styles.Inactive property.
HideSelectionTextColor	The View’s Styles.Inactive property.
HighlightColor	The View’s Styles.Selection property.
HighlightTextColor	The View’s Styles.Selection property.
IndentDesc	The Preview.LeftIndent and Preview.RightIndent properties provide the two indents.
InplaceColumnIndex	The View’s Controller.EditingItem.Index property. Check the Controller.IsEditing property to see whether a cell is currently being edited.
InplaceEditor	The View’s Controller.EditingController.Edit property. The View’s Controller.EditingItem.GetProperties method provides access to the properties of the editor (and these vary depending on the editor’s type).
IsCustomizing	The View’s Controller.Customization property.
Items	The View’s ViewData.Records property.
LastNode	Use the View’s ViewData.Records property to access any record within a View.
LeftCoord	The View’s Controller.LeftPos property.
LookAndFeel	The LookAndFeel property.
MaxRowLineCount	The View’s OptionsView.CellTextMaxLineCount property.
NewItemRowHeight	–;
PreviewFont	The View’s Styles.Preview property.
PreviewLines	The (Banded) Table View’s Preview.MaxLineCount property.
RowFooterColor	The Styles.Footer property specifies the style for both the footer and group footer panels. You can specify different styles for these panels by handling the Styles.OnGetFooterStyle event.
RowFooterTextColor	The Styles.Footer property specifies the style for both footer and group footer panels. You can specify different styles for these panels by handling the Styles.OnGetFooterStyle event.
RowHeight	Use the View’s ViewInfo.RecordsViewInfo[ARowIndex].Height property. ARowIndex specifies the position of the required record among all visible records within a View
RowSeparatorLineWidth	The View’s OptionsView.RowSeparatorWidth property.
ScrollBars	The View’s OptionsView.ScrollBars property.
SelectedCount	The View’s Controller.SelectedRecordCount property.
SelectedNodes	The View’s Controller.SelectedRecords property.
ShowBands	The OptionsView.BandHeaders property of a Banded Table View.
ShowGrid	The View’s OptionsView.GridLines property allows you to specify which grid lines to display.
ShowHeader	The View’s OptionsView.Header property.
ShowHiddenInCustomizeBox	–;
ShowNewItemRow	The View’s OptionsView.NewItemRow property.
ShowPreviewGrid	The View’s OptionsView.GridLines property allows you to specify which grid lines to display.
ShowRowFooter	The View’s OptionsView.GroupFooters property.
SimpleCustomizeBox	–;
State	–;
TopIndex	The View’s Controller.TopRecordIndex property.
TopNode	The View’s ViewData.Records[0] value.
TopVisibleNode	The View’s ViewData.Records[GridView1.Controller.TopRecordIndex] value.
WaitForExpandNodeTime	The grid’s DragOpeningWaitTime property.

Methods
In TdxDBGrid
SaveToHTML	The global ExportGridToHTML procedure.
SaveToText	The global ExportGridToText procedure.
SaveToXLS	The global ExportGridToExcel procedure.
SaveToXML	The global ExportGridToXML procedure.
Derived from TCustomdxDBGrid
AddGroupColumn	Set the GroupIndex property of the desired column to a value greater than or equal to the GroupedColumnCount property value.
BeginGrouping	The View’s BeginUpdate method.
CanAddGroupColumn	–;
DeleteGroupColumn	–; Set the column’s GroupIndex property to –;1 for that purpose.
EndGrouping	The View’s EndUpdate method.
FindNodeByKeyValue	The View’s DataController.FindRecordIndexByKey function.
GetGroupColumnAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. The following code shows how you can determine whether a given point belongs to the header of a column. If so, AColumn is assigned to this column. var AHitTest: TcxCustomGridHitTest; AColumn: TcxGridColumn;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridColumnHeaderHitTest then AColumn := TcxGridColumnHeaderHitTest(AHitTest).Column; See the column’s GroupIndex property value to see whether data is grouped by this column.
GetNodeFooterColumnAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. The following code determines the column referenced within the group footer. var AHitTest: TcxCustomGridHitTest; AColumn: TcxGridColumn;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridGroupFooterCellHitTest then AColumn := TcxGridGroupFooterCellHitTest(AHitTest).Column;
GetSummaryGroupByName	–;
GetSummaryItemAt	–;
InsertGroupColumn	Set the column’s GroupIndex property to a value between 0 and GroupedColumnCount ** –; 1**.
IsGridMode	The View’s DataController.IsGridMode function.
IsPartialLoad	ExpressQuantumGrid4 does not provide the PartialLoad mode. Use grid mode to limit the number of records loaded into memory at once.
PointInFooterPanel	See the View’s ViewInfo.GetHitTest.HitTestCode function. If the specified point belongs to the footer panel, it returns htFooter.
PointInGroupPanel	See the View’s ViewInfo.GetHitTest.HitTestCode function. If the specified point belongs to the group panel, it returns htGroupByBox.
RebuildGroupIndexes	–;
RefreshGroupColumns	The View’s DataController.Summary.Calculate method.
Derived from TCustomdxDBTreeListControl
ClearGroupColumns	The View’s DataController.Groups.ClearGrouping method.
ColumnByFieldName	In (Banded) Table Views, see the GetColumnByFieldName method. In Card Views, the equivalent is GetRowByFieldName. Note that these methods do not throw an exception if no items found linked to the specified field.
ColumnByName	The View’s FindItemByName method.
CreateColumnEx	–; Use the View’s CreateItem (CreateColumn in a grid (Banded) Table View, CreateRow in a Card View) method to add a new column. To specify an editor for the item, see the PropertiesClass and RepositoryItem properties.
CreateColumn	–; See the View’s CreateItem method to add a new item. In Table and Card Views, you use the CreateColumn and CreateRow methods respectively. These implement the same functionality, but differ from CreateItem by the class of the returned object.
FindColumnByFieldName	In (Banded) Table Views, see the GetColumnByFieldName method. In Card Views, the equivalent is GetRowByFieldName.
FullRefresh	Call the View’s DataController.UpdateItems method with False as a parameter.
GetColumnAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element with the coordinates specified. For instance, the following code determines the item (column) at point (X,Y) if the point relates to a record or to the column header panel. var AHitTest: TcxCustomGridHitTest; AItem: TcxCustomGridTableItem;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridRecordCellHitTest then AItem := TcxGridRecordCellHitTest(AHitTest).Itemelse if AHitTest is TcxGridColumnHeaderHitTest then AItem := TcxGridColumnHeaderHitTest(AHitTest).Column;
GetDefaultColumnClass	When the item’s ValueTypeClass property is set, this value determines the default editor assigned to the item. An example of registering a default editor follows: GetDefaultEditDataRepositoryItems.RegisterItem(TcxBooleanValueType, cxEditRegisteredItemsStandardVersion, GetDefaultEditRepository.CreateItem(TcxEditRepositoryCheckBoxItem)); Here, a check box is registered as the editor for items with the value type of TcxBooleanValueType. To redefine the default editor for this value type, call the RegisterItem procedure passing it the required repository item instead of TcxEditRepositoryCheckBoxItem. The second parameter of the procedure specifies the priority of the registered editor. To redefine the existing editor, you must set the parameter to a value greater than the cxEditRegisteredItemsStandardVersion. If an item is assigned to a value type not registered by RegisterItem, its editor is determined by the RegisterDefaultItem method: GetDefaultEditDataRepositoryItems.RegisterDefaultItem(cxEditRegisteredItemsStandardVersion, GetDefaultEditRepository.CreateItem(TcxEditRepositoryTextItem)); If you need to use a different editor, call RegisterDefaultItem passing it another repository item instead of TcxEditRepositoryTextItem. Like the RegisterItem method, set the first parameter to a value greater than the cxEditRegisteredItemsStandardVersion constant.
GetDefaultFieldColumnClass	In data-aware Views, items (columns in a (Banded) Table View and cards in a Card View) are assigned default editors based on the field type. An example of registering a default editor follows: GetDefaultEditDBRepositoryItems.RegisterItem(ftCurrency, cxEditRegisteredItemsStandardVersion, GetDefaultEditRepository.CreateItem(TcxEditRepositoryCurrencyItem)); Here, a currency editor represented by the TcxEditRepositoryCurrencyItem class is registered as an editor for currency fields. The first parameter specifies a value of the TFieldType enumerator. The second parameter specifies the priority of the registered editor. To redefine the existing editor, you must set the parameter to a value greater than the cxEditRegisteredItemsStandardVersion. If an item is assigned to a field not registered by the RegisterItem method, its editor is determined by the RegisterDefaultItem method: GetDefaultEditDBRepositoryItems.RegisterDefaultItem(cxEditRegisteredItemsStandardVersion, GetDefaultEditRepository.CreateItem(TcxEditRepositoryMaskItem)); If you need to use a different editor, call RegisterDefaultItem passing it another repository item instead of TcxEditRepositoryMaskItem. Like the RegisterItem method, set the first parameter to a value greater than the cxEditRegisteredItemsStandardVersion constant.
GetFooterColumnAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. The following code determines a particular column within the footer panel. var AHitTest: TcxCustomGridHitTest; AColumn: TcxGridColumn;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridFooterCellHitTest then AColumn := TcxGridFooterCellHitTest(AHitTest).Column;
GetHeaderColumnAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. The following code shows how you can determine whether a given point is within a column header. If so, AColumn is assigned to this column: var AHitTest: TcxCustomGridHitTest; AColumn: TcxGridColumn;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridColumnHeaderHitTest then AColumn := TcxGridColumnHeaderHitTest(AHitTest).Column;
RefreshBookmarks	–;
Derived from TCustomdxTreeListControl
ApplyBestFit	The item’s ApplyBestFit method. To adjust the width of all View columns, call the View’s ApplyBestFit method.
AssignColumns	The View’s Assign method.
BeginSorting	The View’s BeginUpdate method.
DestroyColumns	The View’s ClearItems method.
EndSorting	The View’s EndUpdate method.
GetAbsoluteColumnIndex	The Index property of the desired item. To access an item by its position among the visible items, use the View’s VisibleItems property.
GetBandAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. The following code gets the band at a specific point provided that it is within the band header panel: var AHitTest: TcxCustomGridHitTest; ABand: TcxGridBand;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridBandHeaderHitTest then ABand := TcxGridBandHeaderHitTest(AHitTest).Band;
GetColumnAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. For instance, the following code determines the item (column) at point (X,Y) if the point is within a record or the column header panel. var AHitTest: TcxCustomGridHitTest; AItem: TcxCustomGridTableItem;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridRecordCellHitTest then AItem := TcxGridRecordCellHitTest(AHitTest).Itemelse if AHitTest is TcxGridColumnHeaderHitTest then AItem := TcxGridColumnHeaderHitTest(AHitTest).Column;
GetDisplayValue	The TcxCustomGridRecord.DisplayTexts property provides the text representation of a value stored in a particular record field.
GetVisibleColumnIndex	The VisibleIndex property of the desired item. To access an individual item by its absolute index, see the View’s Items property (Columns in a (Banded) Table View or Rows in a Card View).
LoadFromIniFile	The View’s RestoreFromIniFile method.
LoadFromRegistry	The View’s RestoreFromRegistry method.
RefreshDefaultColumnsWidths	–; The RestoreDefaults method, declared in View and item classes, allows you to restore the default column widths.
RefreshSorting	–;
RestoreColumnsDefaults	–; The RestoreDefaults method declared in the View and item classes allows you to restore the default column widths and captions.
SaveToIniFile	The View’s StoreToIniFile method.
SaveToRegistry	The View’s StoreToRegistry method.
Derived from TCustomdxTreeList
Add	The View’s DataController.AppendRecord method.
AddFirst	–;
AdjustColumnsWidth	–; The View’s OptionsView.ColumnAutoWidth property
BeginSelection	–;
BeginUpdate	The BeginUpdate method declared in the TcxCustomGrid, TcxCustomGridView, TcxCustomDataController, TcxDataSummary and TcxFilterCriteria classes.
CalcDrawInfo	–;
CancelEditor	Call the View’s Controller.EditingController.HideEdit method passing False as the Accept parameter.
CellRect	Use code like this to access a particular cell region within a record: (cxGrid1TableView1.ViewInfo.RecordsViewInfo[AIndex] as TcxGridDataRowViewInfo).GetBoundsForItem(AItem); AIndex specifies the TcxCustomGridRecord.Index property value. AItem is an item (column in a (Banded) Table View and row in a Card View) to which the required cell belongs.
ClearColumnsSorted	The View’s DataController.ClearSorting method.
ClearNodes	In unbound mode, set the View’s DataController.RecordCount property to 0.
CloseEditor	Call the View’s Controller.EditingController.HideEdit method passing True as the Accept parameter.
ColumnCalcLineCount	–;
ColumnsCustomizing	The View’s Controller.Customization property.
CopyAllToClipboard	Call the View’s CopyToClipboard method passing True as the ACopyAll parameter.
CopySelectedToClipboard	Call the View’s CopyToClipboard method passing False as the ACopyAll parameter.
EndColumnsCustomizing	The View’s Controller.Customization property.
EndSearch	The View’s Controller.CancelIncSearching method.
EndSelection	–;
EndUpdate	The EndUpdate method declared in the TcxCustomGrid, TcxCustomGridView, TcxCustomDataController, TcxDataSummary and TcxFilterCriteria classes.
FreeDrawInfo	–;
FullCollapse	The View’s ViewData.Collapse method lets you collapse group and master rows within a View. The View’s DataController.Groups.FullCollapse method collapses group rows.
FullExpand	The View’s ViewData.Expand method lets you expand group and master rows within a View. The View’s DataController.Groups.FullExpand method expands group rows.
GetEditRect	Use the code as follows (cxGrid1TableView1.ViewInfo.RecordsViewInfo[AIndex] as TcxGridDataRowViewInfo).GetCellViewInfoByItem(AItem).ContentBounds; AIndex specifies the record index defined by the TcxCustomGridRecord.Index property. AItem refers to the item (column in a (Banded) Table View and row in a Card View).
GetFocusedAbsoluteIndex	Use the View’s Controller.FocusedItem.Index property.
GetFocusedVisibleIndex	Use the View’s Controller.FocusedItemIndex or Controller.FocusedItem.VisibleIndex property.
GetHitInfo	See the View’s ViewInfo.GetHitTest method. This returns an object with information on a grid element (a TcxCustomGridHitTest class descendant) at specific coordinates. You can determine the type of the element via the HitTestCode function of the object obtained.
GetHitTestInfoAt	See the View’s ViewInfo.GetHitTest method. This returns an object with information on a grid element (a TcxCustomGridHitTest class descendant) at specific coordinates. You can determine the type of the element via the HitTestCode function of the object returned.
GetNextVisible	–; The View’s ViewData.Records property provides access to all records currently displayed within a View. A record can be obtained from this collection by its Index property as it identifies the visual position of the record within a View. For instance, you can use the code below to access the record following the ACurrentRecord: ANextRecord := view1.ViewData.Records[ACurrentRecord.Index + 1];
GetNodeAt	Use the ViewInfo.GetHitTest method. This returns an object with information on the grid element containing the specified coordinates. The following code determines the record at the (X,Y) point if it falls within the content area: var AHitTest: TcxCustomGridHitTest; ARecord: TcxCustomGridRecord;//…AHitTest := cxGrid1.ViewInfo.GetHitTest(X, Y);if AHitTest is TcxGridRecordHitTest then ARecord := TcxGridRecordHitTest(AHitTest).GridRecord;
GotoFirst	The View’s Controller.GoToFirst method.
GotoLast	The View’s Controller.GoToLast method.
GotoNext	The View’s Controller.GoToNext method.
GotoPrev	The View’s Controller.GoToPrev method.
HeaderPanelBestFit	–;
HideEditor	–; Call the View’s Controller.EditingController.HideEdit method passing True as the Accept parameter.
IndexOf	–; Use the Index property of a TcxCustomGridRecord object to get the position of the record.
Insert	In unbound mode, use the View’s DataController.InsertRecord method to insert a new record above the record specified as the method’s parameter. In bound mode, you should use the methods of the dataset object to which the View is connected by means of a TDataSource object (for instance, the Insert method of a TDataSet descendant).
IsInvertSelect	The View’s OptionsSelection.InvertSelect property.
IsNodeVisible	The Visible property of a TcxCustomGridRecord object.
MakeBandVisible	–;
MakeColumnVisible	The View’s Controller.MakeItemVisible method.
MakeNodeVisible	The View’s Controller.MakeRecordVisible method. The MakeVisible method of a TcxCustomGridRecord object. You can also make a master row owning a specific detail View visible via the MakeMasterGridRecordVisible method.
PointInCustomizingForm	See the View’s ViewInfo.GetHitTest.HitTestCode function. If the specified point belongs to the customization form, it returns the htCustomizationForm constant value.
SaveAllToStrings	–;
SaveAllToTextFile	–;
SaveSelectedToStrings	–;
SaveSelectedToTextFile	See the ExportGridToText procedure.
ShowButtonEditorMouse	See the View’s Controller.EditingController.ShowEdit method.
ShowEditorChar	See the View’s Controller.EditingController.ShowEdit method.
ShowEditor	See the View’s Controller.EditingController.ShowEdit method. Alternatively, you can set the View’s Controller.EditingItem property to open the editor for a specific item within the currently focused record.
ShowEditorMouse	See the View’s Controller.EditingController.ShowEdit method.
StartSearch	To start an incremental search, assign a string to the View’s Controller.IncSearchingText property.
Derived from TCustomdxContainer
HideDrawFocusRect	The View’s OptionsSelection.HideFocusRect property.
IsShowButtonAlways	The View’s OptionsView.ShowEditButtons property.

Events
Derived from TCustomdxDBGrid
OnAddGroupColumn	ExpressQuantumGrid4 does not provide an event to allow you to control column grouping. You can prevent grouping by a particular column though by using the column’s Options.Grouping property.
OnBackgroundDrawEvent	See the View’s OnCustomDrawPartBackground event.
OnClearNodeData	–;
OnColumnClick	The column’s OnHeaderClick event.
OnColumnSorting	ExpressQuantumGrid4 does not provide an event to allow you to control column sorting. The column’s Options.Sorting property can be used to prevent a user from sorting by the column.
OnCustomDraw	The OnCustomDrawCell event provided by View and item objects.
OnEndDragGroupColumn	ExpressQuantumGrid4 does not provide an event to allow you to control column grouping. Use the column’s Options.Grouping property to prevent the grouping by that column.
OnFilterChanged	The View’s DataController.Filter.OnBeforeChange event.
OnEnumFilterValues	The column’s OnGetFilterValues or View’s DataController.Filter.OnGetValueList event.
OnGetCustomSummaryText	–;
OnHideColumn	The View’s OnColumnPosChanged event.
OnReloadGroupList	The View’s DataController.OnGroupingChanged event.
OnShowColumn	The View’s OnColumnPosChanged event.
OnSummaryNode	The TcxDataSummaryItems.OnSummary event provided by the FooterSummaryItems, DefaultGroupSummaryItems properties and by every summary group in the SummaryGroups collection.
Derived from TCustomdxDBTreeListControl
OnBeforeCalcSummary	–;
OnCalcSummary	The View’s DataController.Summary.OnAfterSummary event.
OnChangeNodeEx	–; The View’s OnFocusedRecordChanged event.
OnGetEditColor	See the Styles.OnGetContentStyle event provided by View and item objects.
OnGetPreviewText	The OnGetDisplayText event of the column assigned to the (Banded) Table View’s Preview.Column property.
OnRefreshNodeData	–;
Derived from TCustomdxTreeListControl
OnBandButtonClick	–;
OnBandClick	The TcxGridBand.OnHeaderClick event.
OnCalcRowLineHeight	–;
OnCanBandDragging	ExpressQuantumGrid4 does not provide an event allowing you to control band dragging. You can prevent a user from a dragging a band by setting the View’s OptionsCustomize.BandMoving or the band’s Options.Moving property to False.
OnCanHeaderDragging	ExpressQuantumGrid4 does not provide an event allowing you to control column dragging. The View’s OptionsCustomize.ColumnMoving and the item’s Options.Moving properties can be set to False to prevent the dragging of column(s).
OnChangedColumnsWidth	The View’s OnColumnSizeChanged event.
OnColumnClick	The column’s OnHeaderClick event.
OnColumnMoved	The column’s OnColumnPosChanged event.
OnCustomDraw	The OnCustomDrawCell event provided by View and item objects.
OnCustomDrawBand	The View’s OnCustomDrawBandHeader event.
OnCustomDrawCell	The OnCustomDrawCell event provided by View and item objects.
OnCustomDrawColumnHeader	The View’s OnCustomDrawColumnHeader event.
OnCustomDrawFooter	The View’s OnCustomDrawFooterCell event.
OnCustomDrawFooterNode	The View’s OnCustomDrawFooterCell event.
OnCustomDrawPreview	The OnCustomDrawCell event provided by View and item objects.
OnCustomDrawPreviewCell	The OnCustomDrawCell event provided by View and item objects.
OnDragEndBand	–; Handle the View’s OnBandPosChanged event for writing code after a band’s position has changed.
OnDragEndHeader	–; Handle the View’s OnColumnPosChanged event for writing code after a column’s position has changed
OnDragOverBand	–;
OnDragOverHeader	–;
OnEndDragColumn	–;
OnGetLevelColor	The View’s Styles.OnGetGroupStyle event.
OnGetNodeDragText	–; In v5 or later, the View’s OnGetDragDropText event.
OnHeaderButtonClick	–;
OnHeaderMoved	The View’s OnColumnPosChanged event.
OnHideBand	–; The OnBandPosChanged event declared in a Banded Table View.
OnHideHeader	–; The View’s OnColumnPosChanged event.
OnIsExistFooterCell	–;
OnShowBand	–; The OnBandPosChanged event declared in a Banded Table View.
OnShowHeader	–; The View’s OnColumnPosChanged event.
OnStartBandDragging	–;
OnStartHeaderDragging	–;
Derived from TCustomdxTreeList
OnBeginDragNode	–;
OnCanNodeSelected	The View’s OnCanSelectRecord event.
OnChangeColumn	The View’s OnFocusedItemChanged event.
OnChangeLeftCoord	The View’s OnLeftPosChanged event.
OnChangeNode	The View’s OnFocusedRecordChanged event.
OnChangeTopVisibleNode	The View’s OnTopRecordIndexChanged event.
OnCollapsed	–;
OnCollapsing	–;
OnCompare	The View’s DataController.OnCompare event.
OnDeletion	–;
OnEditChange	The View’s OnEditChanged event.
OnEdited	–;
OnEditing	The View’s OnEditing event.
OnEditValidate	Handle the OnValidate event of the editor assigned to an item.
OnEndColumnsCustomizing	–;
OnExpanded	–;
OnExpanding	–;
OnHotTrackNode	–;
OnSelectedCountChange	The View’s OnSelectionChanged event.

Bands

Unlike the previous version of the grid control, ExpressQuantumGrid4 does not contain bands by default. Instead, it provides Banded Table Views (TcxGridBandedTableView and TcxGridDBBandedTableView). A Banded Table View contains the Bands property providing a collection of TcxGridBand objects.

ExpressQuantumGrid3 members	ExpressQuantumGrid4 equivalents

TdxTreeListBand Object

Properties
In TdxTreeListBand
Alignment	The TcxGridBand.Alignment property.
Caption	The TcxGridBand.Caption property.
DisableCustomizing	The TcxGridBand.VisibleForCustomization property.
DisableDragging	The band’s Options.Moving property.
Fixed	The TcxGridBand.FixedKind property.
HeaderColCount	The Count property of a band row within a Banded Table View. To access a particular band’s row, use code as follows bandedTableView1.Bands[ABandIndex].Rows[RowIndex]
HeaderColumn	The Items property of a band row within a Banded Table View. To access a particular band’s row, use code as follows: bandedTableView1.Bands[ABandIndex].Rows[RowIndex]
HeaderRowCount	The band’s Rows.Count property.
MinWidth	To specify the minimum width of a band, set the minimum width (the MinWidth property) of the columns displayed within the band.
OnlyOwnColumns	–;
Sizing	The band’s Options.Sizing property.
Visible	The Visible property of a band within a Banded Table View. Individual bands can be accessed via the Banded Table View’s Bands property.
VisibleIndex	The VisibleIndex property of a band within a Banded Table View. Individual bands can be accessed via the Banded Table View’s Bands property.
Width	The Width property of a band within a Banded Table View. Individual bands can be accessed via the Banded Table View’s Bands property.
Methods
In TdxTreeListBand
RestoreDefaults	–;

TdxTreeListBands Object

Properties
In TdxTreeListBands
Items	The TcxGridBands.Items property.
TreeList	Bands belong to a View specified by the TcxGridBands.GridView property.
VisibleCount	The TcxGridBands.VisibleCount property.
VisibleItems	The TcxGridBands.VisibleItems property.
Methods
In TdxTreeListBands
Add	The TcxGridBands.Add method.
GetAbsoluteIndex	–;
GetVisibleIndex	–;
RestoreDefaults	–;

Columns

Every View provided by ExpressQuantumGrid4 contains a collection of View-specific items (columns in a (Banded) Table View and rows in a Card View) displaying data from particular fields. Unlike the previous version of the grid control, ExpressQuantumGrid4 does not provide different column types. Instead, you should use the item’s properties (RepositoryItem or PropertiesClass) to specify the editor type used to edit the item’s data. You can refer to the Data Editing Using Inplace Editors section for more information.

ExpressQuantumGrid4 provides different repository items corresponding to the ExpressQuantumGrid3 columns. These repository items can be used to specify the in-place editor type:

ExpressQuantumGrid3 members	ExpressQuantumGrid4 equivalents

ExpressQuantumGrid3 columns	Repository items
TdxDBGridColumn	TcxEditRepositoryTextItem
TdxDBGridBlobColumn	TcxEditRepositoryBlobItem
TdxDBGridButtonColumn	TcxEditRepositoryButtonItem
TdxDBGridCalcColumn	TcxEditRepositoryCalcItem
TdxDBGridCheckColumn	TcxEditRepositoryCheckBoxItem
TdxDBGridCurrencyColumn	TcxEditRepositoryCurrencyItem
TdxDBGridDateColumn	TcxEditRepositoryDateItem
TdxDBGridDropDownColumn	–;
TdxDBGridExtLookupColumn	TcxEditRepositoryExtLookupComboBoxItem
TdxDBGridGraphicColumn	TcxEditRepositoryImageItem
TdxDBGridHyperLinkColumn	TcxEditRepositoryHyperLinkItem
TdxDBGridImageColumn	TcxEditRepositoryImageComboBoxItem
TdxDBGridLookupColumn	TcxEditRepositoryLookupComboBoxItem
TdxDBGridMaskColumn	TcxEditRepositoryMaskItem
TdxDBGridMemoColumn	TcxEditRepositoryMemoItem
TdxDBGridMRUColumn	TcxEditRepositoryMRUItem
TdxDBGridPickColumn	TcxEditRepositoryComboBoxItem
TdxDBGridPopupColumn	TcxEditRepositoryPopupItem
TdxDBGridSpinColumn	TcxEditRepositorySpinItem
TdxDBGridTimeColumn	TcxEditRepositoryTimeItem
TdxDBGridWrapperColumn	–; Use any repository item listed above and handle the OnGetProperties event to specify the type of editor used to edit values of individual item cells.

Footer summary properties were removed from the columns and moved into the TcxDataSummary class. This class maintains the calculation of all summaries (footer, group summaries and summary groups).

The next table lists members of the TdxDBGridColumn class and the ExpressQuantumGrid4 equivalents:

TdxDBGridColumn Object

Properties
Derived from TdxDBTreeListColumn
ATreeList	Items belong to a View specified by the GridView property.
DisableGrouping	The column’s Options.Grouping property.
Field	The item’s DataBinding.Field property.
FieldName	The item’s DataBinding.FieldName property.
GroupIndex	The column’s GroupIndex property.
SortBySummary	–;
SummaryField	–; The ItemLink (Column in Table Views) and/or FieldName properties of a summary item. To calculate summaries when data is grouped by the current column, create a summary group via the View’s DataController.Summary.SummaryGroups object, add summary item(s) using the TcxDataSummaryGroup.SummaryItems.Add method and specify their ItemLink or FieldName property. Use the Position property to specify whether the summary values will be displayed in the group footers or in group rows. add a new element to the TcxDataSummaryGroup.Links collection and set its ItemLink (Column in Table Views) property to the current column.
SummaryFooterField	–; The ItemLink and/or FieldName properties of a summary item within the View’s DataController.Summary.FooterSummaryItems collection.
SummaryFooterFormat	–; The Format property of a summary item within the View’s DataController.Summary.FooterSummaryItems collection.
SummaryFooterText	–; Use the FooterSummaryTexts property of the View’s DataController.Summary object.
SummaryFooterType	–; The Kind property of a summary item within the View’s DataController.Summary.FooterSummaryItems collection.
SummaryFooterValue	–; To get the footer summary results, use the FooterSummaryValues property of the View’s DataController.Summary object.
SummaryFormat	–; The Format property of a summary item.
SummaryGroup	–;
SummaryGroupName	–; To calculate a set of summaries when data is grouped by the current column: create a summary group via the View’s DataController.Summary.SummaryGroups object. add summary items (the TcxDataSummaryGroup.SummaryItems.Add method) corresponding to the summaries you want to display. add a new element to the TcxDataSummaryGroup.Links collection and set its ItemLink property to the current column.
SummaryType	–; The Kind property of a summary item. See the SummaryField entry for details.
VariantType	The item’s DataBinding.ValueTypeClass.GetVarType method.
Derived from TdxTreeListColumn
Alignment	The Alignment attribute of the in-place editor properties. To access the column editor properties, use the RepositoryItem.Properties, Properties objects or the GetProperties method.
AssignedValues	–;
BandIndex	The banded column’s Position.BandIndex property.
Caption	The item’s Caption property.
CharCase	The CharCase attribute of the in-place editor properties. To access the column editor properties, use the RepositoryItem.Properties, Properties objects or the GetProperties method.
ColIndex	The banded column’s Position.ColIndex property.
Color	The item’s Styles.Content property.
DisableCaption	–;
DisableCustomizing	The column’s VisibleForCustomization property.
DisableDragging	The column’s Options.Moving property.
DisableEditor	The item’s Options.Editing property.
DisableFilter	The item’s Options.Filtering property.
Font	The item’s Styles.Content property.
HeaderAlignment	The HeaderAlignmentHorz and HeaderAlignmentVert properties of columns; the CaptionAlignmentHorz and CaptionAlignmentVert properties of Card View rows.
HeaderGlyph	–; The View’s BackgroundBitmaps.Header property allows you to specify the bitmap used to render all column headers.
HeaderMaxLineCount	The banded column’s Position.LineCount property.
Index	The item’s Index property.
MaxLength	The MaxLength attribute of the in-place editor properties. To access the column editor properties, use the RepositoryItem.Properties, Properties objects or the GetProperties method.
MinWidth	The column’s MinWidth property.
PasswordChar	–; You can use the EchoMode attribute of the in-place editor properties to specify how characters are displayed. To access the column editor properties, use the RepositoryItem.Properties, Properties objects or the GetProperties method.
ReadOnly	The ReadOnly attribute of the in-place editor properties. To access the column editor properties, use the RepositoryItem.Properties, Properties objects or the GetProperties method.
RowIndex	The banded column’s Position.RowIndex property.
Sizing	The column’s Options.HorzSizing property.
Sorted	The column’s SortOrder property.
TabStop	–;
VertAlignment	The Alignment attribute of the in-place editor properties. To access the column editor properties, use the RepositoryItem.Properties, Properties objects or the GetProperties method.
Visible	The item’s Visible property.
Width	The item’s Width property.
Methods
Derived from TdxTreeListColumn
Assign	The item’s Assign method.
DefaultAlignment	The item’s DefaultValuesProvider.DefaultAlignment method.
DefaultCaption	The item’s DataBinding.DefaultCaption method.
DefaultColor	–;
DefaultFont	–;
DefaultReadOnly	The item’s DefaultValuesProvider.DefaultReadOnly method.
DefaultWidth	The item’s DataBinding.DefaultWidth method.
GetBestFit	–;
RestoreDefaults	The item’s RestoreDefaults method.
RestoreDefaultWidth	–;
Events
Derived from TdxDBTreeListColumn
OnCustomDraw	The item’s OnCustomDrawCell event.
OnCustomDrawHeader	The item’s OnCustomDrawHeader event.
OnDrawSummaryFooter	The column’s OnCustomDrawFooterCell event.
OnGetText	The item’s OnGetDisplayText event.
OnSummary	The OnSummary event of the View’s DataController.Summary.DefaultGroupSummaryItems and DataController.DataSummary.SummaryGroups[ASummaryGroupIndex].SummaryItems objects.
OnSummaryFooter	The OnSummary event of the View’s DataController.Summary.FooterSummaryItems object.
Derived from TdxTreeListColumn
OnChange	–; See the View’s OnEditChanged event.
OnCustomDrawCell	The item’s OnCustomDrawCell event.
OnCustomDrawColumnHeader	The item’s OnCustomDrawHeader event.
OnValidate	–; Specify an editor for an item via the PropertiesClass or RepositoryItem property and handle the Properties.OnValidate or RepositoryItem.Properties.OnValidate event respectively.

Nodes/Records

Records provided by an ExpressQuantumGrid4 View can be accessed via the ViewData property (e.g. TcxGridTableView.ViewData). TcxCustomGridRecord is the base class for items available via the ViewData object and these items consist of group rows, master and data rows, the new item row and cards. ViewData contains only those records which are currently visible or potentially visible by scrolling. It does not contain records hidden under collapsed group rows.

TdxDBGridNode Object

ExpressQuantumGrid3 members	ExpressQuantumGrid4 equivalents

Properties
In TdxDBGridNode
GroupId	The TcxGridGroupRow.Value property.
RecNo	The TcxCustomGridRecord.RecordIndex property.
SummaryValue	–; SummaryValue represents a value of a group summary set via the column’s SummaryType and SummaryField properties. There are no equivalents to these three properties. In ExpressQuantumGrid4, you use summary groups to calculate summaries when grouping by particular column(s). Summary groups are supported by the View’s DataController.Summary.SummaryGroups property. To get a group summary value for a particular data group, use the DataController.Summary.GroupSummaryValues property.
SummaryValues	–; Use the View’s DataController.Summary.GroupSummaryValues property to get a summary value for a particular data group.
Derived from TdxDBTreeListControlNode
Description	–;
Id	–; See TcxCustomGridRecord.RecordIndex property.
VariantData	–;
VariantValues	The View’s DataController.Values property and the TcxCustomGridRecord.Values property.
Derived from TdxTreeListNode
AbsoluteIndex	The TcxCustomGridRecord.Index property.
Count	–;
CountValues	The TcxCustomGridRecord.ValueCount property.
Data	–;
Deleting	–;
Expanded	The TcxCustomGridRecord.Expanded property.
Focused	The TcxCustomGridRecord.Focused property.
HasChildren	–; You can determine whether the current row is a group row by analyzing the row class. A group row contains an object of the TcxGridGroupRow class.
ImageIndex	–;
Index	–;
IsLast	–;
IsVisible	The TcxCustomGridRecord.Visible property.
Items	–; TcxGridGroupRow does not maintain a collection of child rows. Instead, you can use the View’s ViewData property to access the list of all records currently displayed within the View.
Level	The TcxCustomGridRecord.Level property.
Owner	Use the TcxCustomGridRecord.ViewData property to access the object owning the current record.
Parent	–;
Selected	The TcxCustomGridRecord.Selected property.
SelectedIndex	–;
StateIndex	–;
Strings	The TcxCustomGridRecord.DisplayTexts property. For group rows, use the TcxGridGroupRow.DisplayText property.
Values	The TcxCustomGridRecord.Values property.
Methods
Derived from TdxDBTreeListControlNode
Delete	–; In unbound mode, use the View’s DataController.DeleteRecord method passing it the record’s RecordIndex property value as a parameter. To delete records from Views connected to datasets, use the View’s DataController.DeleteFocused or DeleteSelection methods.
Derived from TdxTreeListNode
AddChild	–;
AddChildFirst	–;
AddNodesToList	–;
Collapse	The TcxCustomGridRecord.Collapse method.
DeleteChildren	–;
Expand	The TcxCustomGridRecord.Expand method.
GetNext	–;
GetNextNode	–;
GetNextSibling	–;
GetPrev	–;
GetPrevSibling	–;
GetPriorNode	–;
GetPriorParentNode	–;
HasAsParent	–;
IndexOf	–;
InsertChild	–;
MakeVisible	The TcxCustomGridRecord.MakeVisible method.
MoveTo	–;

Summary items

ExpressQuantumGrid provides summary groups (as in the previous version), thus enabling you to calculate summaries when grouping by particular columns. Default summary groups are now available via the View’s DataController.Summary.DefaultGroupSummaryItems property.

ExpressQuantumGrid3 members	ExpressQuantumGrid4 equivalents

TdxDBGridSummaryGroups Object

Properties
In TdxDBGridSummaryGroups
DBGrid	The collection of summary groups belongs to a TcxDataSummary object that can be obtained via the TcxDataSummaryGroups.Summary property.
Items	The TcxDataSummaryGroups.Items property.
Methods
In TdxDBGridSummaryGroups
Add	The TcxDataSummaryGroups.Add method.
GetDefaultGroup	–; Default groups are provided by the View’s DataController.Summary.DefaultGroupSummaryItems property.

TdxDBGridSummaryGroup Object

Properties
In TdxDBGridSummaryGroup
BeginSummaryText	The TcxDataGroupSummaryItems.BeginText property.
DefaultGroup	ExpressQuantumGrid4 provides a collection of default summary items supported by the View’s DataController.Summary.DefaultGroupSummaryItems property. Default summary items specify summaries to calculate when data is grouped by any grid column except for those columns associated with summary groups in the DataController.Summary.SummaryGroups property.
EndSummaryText	The TcxDataGroupSummaryItems.EndText property.
Name	–;
SummaryItems	The TcxDataSummaryGroup.SummaryItems property.
Methods
In TdxDBGridSummaryGroup
GetSummaryGroups	See the TcxDataSummaryGroup.SummaryGroups property.
Events
In TdxDBGridSummaryGroup
OnChangeName	–;

TdxDBGridSummaryItems Object

Properties
In TdxDBGridSummaryItems
Items	The Items property of the TcxDataSummaryGroup.SummaryItems object. You can access a particular summary group via the View’s DataController.Summary.SummaryGroups property.
SummaryGroup	–;
Methods
In TdxDBGridSummaryItems
Add	The TcxDataSummaryItems.Add method.

TdxDBGridSummaryItem Object

Properties
In TdxDBGridSummaryItem
ColumnName	The ItemLink property of a summary item contained in the TcxDataSummaryGroup.SummaryItems collection. Table Views and Banded Table Views provide summary items. These declare the Column property (TcxGridTableSummaryItem.Column, for instance) which can be used instead of ItemLink.
SummaryField	The FieldName property of a summary item contained in the TcxDataSummaryGroup.SummaryItems collection.
SummaryFormat	The Format property of a summary item contained in the TcxDataSummaryGroup.SummaryItems collection.
SummaryType	The Kind property of a summary item contained in the TcxDataSummaryGroup.SummaryItems collection.
Methods
In TdxDBGridSummaryItem
GetSummaryItems	–; See the TcxDataSummaryItem.SummaryItems property.
Events
In TdxDBGridSummaryItem
OnSummary	See the TcxDataSummaryItems.OnSummary event.

Filter

Filtering data in ExpressQuantumGrid4 is implemented by the TcxDataFilterCriteria class. It allows you to create complex filter conditions, enable/disable filter criteria and customize the filter drop-down list.

ExpressQuantumGrid3 members	ExpressQuantumGrid4 equivalents

TdxDBGridFilter Object

Properties
In TdxDBGridFilter
Active	The View’s OptionsCustomize.ColumnFiltering property.
AutoDataSetFilter	The View’s DataController.Filter.AutoDataSetFilter property.
CaseInsensitive	The fcoCaseInsensitive option in the View’s DataController.Filter.AutoDataSetFilter property.
DropDownCount	The View’s Filtering.MaxDropDownCount property.
FilterCaption	The View’s DataController.Filter.FilterCaption property.
FilterStatus	The View’s Filtering.Visible property.
FilterText	The View’s DataController.Filter.FilterText property.
MaxDropDownCount	The View’s DataController.Filter.MaxValueListCount property.
Methods
In TdxDBGridFilter
Add	The item’s DataBinding.AddToFilter method. The View’s DataController.AddItemToFilter method. The View’s DataController.Filter.AddItem method. The View’s DataController.Filter.Root.AddItem method
AddNull	When creating a filter condition using the TcxFilterCriteriaItemList.AddItem method, you can specify NULL as a value for the AValue parameter.
Clear	The View’s DataController.Filter.Clear method. You can temporarily disable filtering via the DataController.Filter.Active property.
Remove	The View’s DataController.Filter.RemoveItemByItemLink method. Pass the column object as the AItemLink parameter.
ShowCustomDialog	The View’s Filtering.RunCustomizeDialog method.