Multiselect
Multiselect
TDBGridEh
allows to select records, columns and rectangle areas for following operations above the selected area. To customize multiselecting you can use next properties:
dgMultiSelect in Options property
- Specifies whether the multiselect is allowed.
dghClearSelection in OptionsEh property
- Specifies whether the selection will be cleared after user move to the next cell.
EditActions property
- Specifies actions which user can execute above the selection (Copy
,Cut
,Delete
,Paste
,SelectAll
).
AllowedSelections property
- Specifies the types of selections that is allowed to do (Rows
, Columns
, Rectangle area
, All
).
Selection property
specifies a current multiselection state, selected records, columns or rectangle area and it has properties and functions to access them.
If user change the selected area, the OnSelectionChange
event occurs.
To access the selected area, use the following properties of the grid:
SelectedRows: TBookmarkListEh
Selection: TDBGridEhSelection
It contains information on the selected area and the list of selected items.
Selection.SelectionType
gstRecordBookmarks
– Records are Selected. Use the property SelectedRows
or Selection.Rows
access to selected records.
gstRectangle
– Rectangular area is selected. Use Selection.Rect
property to get the border of the selected area.
gstColumns
– Columns are selected. Use Selection.Columns
property to access the list of selected columns
gstAll
– all grid is selected.
gstNon
– the grid has no multiple selection.
property Selection.Rows
Count: Integer
The number of entries in the list of bookmarks
Items[Index: Integer]: TUniBookmarkEh
The property to access elements of an array of selected bookmarks.
CurrentRowSelected Boolean
The property returns and sets, if the current selected entry in the list of selected records.
Selection.Rect
BottomRow: TUniBookmarkEh
Pointer to the lower border area. Index specifies the location as a bookmark for a record in DataSet.
LeftCol: Longint
The column number of the left border of the selected area.
TopRow: TUniBookmarkEh
A pointer to the upper boundary of the field.
RightCol: Longint
Column number right border of the selected area.
Method
function DataCellSelected(DataCol: Longint; DataRow: TUniBookmarkEh): Boolean;
Returns information whether said cell within the selected area.
Selection.Columns
The Selection.Columns
property is of TDBGridEhSelectionCols
type. The property contains a list of selected columns. TDBGridEhSelectionCols
type have the following properties and methods:
Count: Integer
The number of selected columns.
Items[Index: Integer]: TColumnsEh
The property sets the access to the elements of the selected columns.