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Reference for unit 'Controls' (#lcl)

TDragMessage

DragManager message types.

Declaration

Source position: controls.pp line 340

`type TDragMessage = (`
`dmDragEnter,`
`dmDragLeave,`
`dmDragMove,`
`dmDragDrop,`
`dmDragCancel,`
`dmFindTarget`
`);`

Description

All messages are sent to the target control, except dmDragDrop and dmDragCancel is sent to the source control.

dmDragEnter: mouse enters control
dmDragLeave: mouse leaves control
dmDragMove: mouse moves over control (after dmDragEnter)
dmDragDrop: control dropped
dmDragCancel: dragging aborted
dmFindTarget: find child control under the mouse

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