;
; ------------------------------------------------------------
;
;   PureBasic - Drag & Drop
;
;    (c) 2007 - Fantaisie Software
;
; ------------------------------------------------------------
;

#Window = 0

Enumeration    ; Images
  #ImageSource
  #ImageTarget
EndEnumeration

Enumeration    ; Gadgets
  #SourceText
  #SourceImage
  #SourceFiles
  #SourcePrivate
  #TargetText
  #TargetImage
  #TargetFiles
  #TargetPrivate1
  #TargetPrivate2
EndEnumeration



If OpenWindow(#Window, 0, 0, 760, 310, "Drag & Drop", #PB_Window_SystemMenu|#PB_Window_ScreenCentered)
  
  ; Create some images for the image demonstration
  ; 
  CreateImage(#ImageSource, 136, 136)
  If StartDrawing(ImageOutput(#ImageSource))
    Box(0, 0, 136, 136, $FFFFFF)
    DrawText(5, 5, "Drag this image", $000000, $FFFFFF)        
    For i = 45 To 1 Step -1
      Circle(70, 80, i, Random($FFFFFF))
    Next i        
    
    StopDrawing()
  EndIf  
  
  CreateImage(#ImageTarget, 136, 136)
  If StartDrawing(ImageOutput(#ImageTarget))
    Box(0, 0, 136, 136, $FFFFFF)
    DrawText(5, 5, "Drop images here", $000000, $FFFFFF)
    StopDrawing()
  EndIf  
  
  
  ; Create and fill the source gadgets
  ;
  ListIconGadget(#SourceText,       10, 10, 140, 140, "Drag Text here", 130)   
  ImageGadget(#SourceImage,        160, 10, 140, 140, ImageID(#ImageSource), #PB_Image_Border) 
  ExplorerListGadget(#SourceFiles, 310, 10, 290, 140, GetHomeDirectory(), #PB_Explorer_MultiSelect)
  ListIconGadget(#SourcePrivate,   610, 10, 140, 140, "Drag private stuff here", 260)
     
  AddGadgetItem(#SourceText, -1, "hello world")
  AddGadgetItem(#SourceText, -1, "The quick brown fox jumped over the lazy dog")
  AddGadgetItem(#SourceText, -1, "abcdefg")
  AddGadgetItem(#SourceText, -1, "123456789")
  
  AddGadgetItem(#SourcePrivate, -1, "Private type 1")
  AddGadgetItem(#SourcePrivate, -1, "Private type 2")
  

  ; Create the target gadgets
  ;
  ListIconGadget(#TargetText,  10, 160, 140, 140, "Drop Text here", 130)
  ImageGadget(#TargetImage,    160, 160, 140, 140, ImageID(#ImageTarget), #PB_Image_Border) 
  ListIconGadget(#TargetFiles, 310, 160, 140, 140, "Drop Files here", 130)
  ListIconGadget(#TargetPrivate1, 460, 160, 140, 140, "Drop Private Type 1 here", 130)
  ListIconGadget(#TargetPrivate2, 610, 160, 140, 140, "Drop Private Type 2 here", 130)

  
  ; Now enable the dropping on the target gadgets
  ;
  EnableGadgetDrop(#TargetText,     #PB_Drop_Text,    #PB_Drag_Copy)
  EnableGadgetDrop(#TargetImage,    #PB_Drop_Image,   #PB_Drag_Copy)
  EnableGadgetDrop(#TargetFiles,    #PB_Drop_Files,   #PB_Drag_Copy)
  EnableGadgetDrop(#TargetPrivate1, #PB_Drop_Private, #PB_Drag_Copy, 1)
  EnableGadgetDrop(#TargetPrivate2, #PB_Drop_Private, #PB_Drag_Copy, 2)

  Repeat
    Event = WaitWindowEvent()
    
    ; DragStart event on the source gadgets, initiate a drag & drop
    ;
    If Event = #PB_Event_Gadget And EventType() = #PB_EventType_DragStart
      Select EventGadget()
      
        Case #SourceText
          Text$ = GetGadgetItemText(#SourceText, GetGadgetState(#SourceText))
          DragText(Text$)
        
        Case #SourceImage
          DragImage(ImageID(#ImageSource))
        
        Case #SourceFiles
          Files$ = ""       
          For i = 0 To CountGadgetItems(#SourceFiles)-1
            If GetGadgetItemState(#SourceFiles, i) & #PB_Explorer_Selected
              Files$ + GetGadgetText(#SourceFiles) + GetGadgetItemText(#SourceFiles, i) + Chr(10)
            EndIf
          Next i 
          If Files$ <> ""
            DragFiles(Files$)
          EndIf
        
        ; "Private" Drags only work within the program, everything else
        ; also works with other applications (Explorer, Word, etc)
        ;
        Case #SourcePrivate
          If GetGadgetState(#SourcePrivate) = 0
            DragPrivate(1)
          Else
            DragPrivate(2)
          EndIf
              
      EndSelect
    
    ; Drop event on the target gadgets, receive the dropped data
    ;
    ElseIf Event = #PB_Event_GadgetDrop
      Select EventGadget()
      
        Case #TargetText
          AddGadgetItem(#TargetText, -1, EventDropText())
        
        Case #TargetImage
          If EventDropImage(#ImageTarget)
            SetGadgetState(#TargetImage, ImageID(#ImageTarget))
          EndIf
        
        Case #TargetFiles
          Files$ = EventDropFiles()
          Count  = CountString(Files$, Chr(10)) + 1
          For i = 1 To Count
            AddGadgetItem(#TargetFiles, -1, StringField(Files$, i, Chr(10)))
          Next i
        
        Case #TargetPrivate1
          AddGadgetItem(#TargetPrivate1, -1, "Private type 1 dropped")
                
        Case #TargetPrivate2
          AddGadgetItem(#TargetPrivate2, -1, "Private type 2 dropped")
        
      EndSelect
    
    EndIf
    
  Until Event = #PB_Event_CloseWindow
EndIf

End