Drag and Drop in Tables

Application Scenarios

The following application cases of drag and drop can be used with Tables:

1. Drag and drop between rows and the end of the table

You can drop selected rows of a Table between existing Table rows or add them to a Table. Aggregations DRAG_SOURCE_INFO and DROP_TARGET_INFO, and event onDrop are provided for this.

2. Drag and drop on rows

You can specify that users can drop objects onto a row. Aggregation dropOnRowTargetInfo, property dropOnRowName, and property DropTargetInfo.name are provided for this.

3. Drop into cells

To drop an element with DragSourceInfo into table cells, use DropTargetCellEditor as the cell editot in CTable.

Enabling Drop on Rows

1. Aggregate DropTargetInfos to the table aggregation DROP_ROW_TRG_INFS.

2. Assign various values as the DropTargetInfos.name. If you want to reuse DropTargetInfo in the Table aggregation DROP_TARGET_INFO, enter a name there.

3. Set the property Table.dropOnRowName.

   The value must either be set to initial or it must be the name of one of the DropTargetInfos that belongs to the Table aggregations DROP_TARGET_INFO or DROP_ROW_TRG_INFS.

4. Using context binding you can assign a different value to each Table row, and thereby influence drop-on-row behavior.

Drag and Drop in Hierarchical Tables

There are two scenarios for hierarchical Tables with row arrangements TreeByKeyTableColumn or TreeByNestingTableColumn.

• If the following conditions are fulfilled, you can drop objects between table rows, and the DropTargetInfo of the Table specifies globally how this is to be done (it specifies the tags:

  • Aggregation Table.dropOnRowTargetInfo is empty

  • Property Table.dropOnRowName is initial

  • Property DropTargetInfo.name of the aggregated element in Table.dropTargetInfo is initial

• As soon as one of the above properties or aggregations is filled with values, the following applies to drag and drop: The DropTargetInfo in aggregation Table.dropTargetInfo controls the insertion of rows using drag and drop only on the root node, that is, at the highest hierarchy level. As described in the previous section, the Table.dropOnRowName property together with DropTargetInfos, which is aggregated to Table, specifies if and how UI elements can be dropped onto a Table row. In addition property Table.dropOnRowName and the DropTargetInfo specified by this specifies whether and how elements can be inserted between child elements.