DndSource (Property)

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Drag-and-drop operations managed automatically or set programmatically
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DndSource (Property)

In french: DndSource

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 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.

Example

// -- Initialisation du champ LISTE_Source
// LISTE_Source n'est pas cible
LISTE_Source.DndSource = dndInactive

// -- Initialisation du champ LISTE_Cible
LISTE_Cible.DndCible = dndProgram
DnDEvent("Lâcher", "LISTE_Cible", dndDrop)
DnDEvent("Survol", "LISTE_Cible", dndDragOver)

Syntax

Finding out the behavior of a source control for Drag and Drop Hide the details

<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 Hide the details

<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

Remarks

Drag-and-drop operations managed automatically or set programmatically

An automation "Drag and Drop" is available for the following fields:

Upload control,
Static Text control,
Button control,
Link control,
Image control,
Formatted display control,
Edit control,
List Box control,
Combo Box control.

You can also programmatically set drag-and-drop operations on cells, supercontrols and control templates.

Limitation

The DndSource property can only be used with the following controls:

Edit control,
Button control,
Static Text control,
Link control,
Image control,
Formatted display control,
List Box control,
Combo Box control,
Cell control,
Supercontrol,
Control template.
Rich Text Area control.