You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Win/Drag and Drop/Picture Drop
Class App Inherits Application
Const kEditClear = "&Löschen"
Const kFileQuit = "Beenden"
Const kFileQuitShortcut = ""
End Class
MenuBar MenuBar1
MenuItem FileMenu = "&Ablage"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Bearbeiten"
MenuItem EditUndo = "&Rückgängig"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "&Ausschneiden"
MenuItem EditCopy = "&Kopieren"
MenuItem EditPaste = "&Einfügen"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "&Alles auswählen"
End MenuBar
Class PictureDropTarget Inherits WindowsDropTargetMBS
EventHandler Function DragEnter(dataObject as WinDataObjectMBS, keystate as integer, x as integer, y as integer, byref effect as integer) As integer
// does the dataobject contain data we want?
allowed = dataObject.hasPicture
if allowed then
// allow it
effect = DROPEFFECT_COPY
else
// deny
effect = DROPEFFECT_NONE
end if
Return S_OK
End EventHandler
EventHandler Function DragLeave() As integer
return S_OK
End EventHandler
EventHandler Function DragOver(keystate as integer, x as integer, y as integer, byref effect as integer) As integer
if allowed then
// allow it
effect = DROPEFFECT_COPY
else
// deny
effect = DROPEFFECT_NONE
end if
Return S_OK
End EventHandler
EventHandler Function Drop(dataObject as WinDataObjectMBS, keystate as integer, x as integer, y as integer, byref effect as integer) As integer
System.DebugLog "Inside drop event "+str(allowed)
if allowed then
// allow it
effect = DROPEFFECT_COPY
PictureDropWindow.Canvas2.Backdrop = dataObject.GetPicture
else
// deny
effect = DROPEFFECT_NONE
end if
Return S_OK
End EventHandler
Property allowed As Boolean
End Class
Class PictureDropWindow Inherits Window
Control StaticText1 Inherits Label
ControlInstance StaticText1 Inherits Label
End Control
Control Canvas2 Inherits Canvas
ControlInstance Canvas2 Inherits Canvas
EventHandler Sub Open()
me.Backdrop = new Picture(100,100,32)
End EventHandler
End Control
EventHandler Sub Open()
w = new PictureDropTarget
dim e as integer = w.AttachToWindow(Self)
System.DebugLog "AttachToWindow: "+str(e)
End EventHandler
Property w As PictureDropTarget
End Class