DndSource (Property)

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WINDEV, WEBDEV Y WINDEV MOBILE

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Drag-and-drop operations managed automatically or set programmatically
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WINDEV

WEBDEV

WINDEV Mobile

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DndSource (Property)

For certain field types, WINDEV and WEBDEV offer a manage drag-and-drop operations automatically: simply check the corresponding option in the "Detail" tab of the field description. A control can be defined as source or target of a drag-and-drop operation.

Automatic Drag and Drop is available:

for Edit, List Box, ListView and TreeView controls.
The automatic Drag and Drop mode is also available for tokens in a "Text token" Edit control.
for Upload, Static, Button, Link, Image, formatted text, List Box and Combo Box controls.

In a drag-and-drop operations set programmatically, the DndSource and DndTarget properties are used to define the Drag and Drop source and target controls.

The DndSource property determines how a control behaves in a drag-and-drop operation (Edit control, List Box, ListView, Looper, TreeView, etc.). This control will be set as the source object of the drag-and-drop operation.

Ejemplo

// -- Initialization of LIST_Source
// LIST_Source is not a target
LIST_Source.DndSource = dndInactive

// -- Initialization of LIST_Target
LIST_Target.DndTarget = dndProgram
DnDEvent("Drop", "LIST_Target", dndDrop)
DnDEvent("DragOver", "LIST_Target", dndDragOver)

Sintaxis

Finding out the behavior of a source control for Drag and Drop Ocultar los detalles

<Drag and Drop> = <Control used>.DndSource

<Drag and Drop>: Constant

Identifies the behavior of the source control for Drag and Drop:
dndAuto Drag-and-drop operations are handled automatically
dndInactive Drag and Drop is disabled for this control
dndProgram The developer sets the drag-and-drop operation programmatically

<Control used>: Control name

Name of the control to be used.

Modifying the behavior of a source control for Drag and Drop Ocultar los detalles

<Control used>.DndSource = <Drag and Drop>

<Control used>: Control name

Name of the control to be used.

<Drag and Drop>: Constant

Identifies the behavior of the source control for Drag and Drop.
dndAuto Drag-and-drop operations are handled automatically
dndInactive Drag and Drop is disabled for this control
dndProgram The developer sets the drag-and-drop operation programmatically

Observaciones

Drag-and-drop operations managed automatically or set programmatically

Automatic drag-and-drop operations are available for Edit, List Box, ListView, TreeView and Table controls.
The automatic Drag and Drop mode is also available for tokens in a "Text token" Edit control.

Drag-and-drop operations can be set programmatically for the following controls: