;-TOP 
; Comment : Linux Screen3DMousePatch
; Author  : mk-soft
; Version : v1.03.2
; Create  : 02.09.2022
; Update  : 10.09.2022
; Link    : https://www.purebasic.fr/english/viewtopic.php?t=79766

; Info:
;
; - Call InitWindowMouse after OpenScreen or OpenWindowedScreen
; - Call RestoreMouse at end of program to restore desktop mouse cursor (Needs only with OpenScreen)
; - Call FrameDelay for save cpu usage (Needs only with OpenWindowedScreen)

; - Enumeration of cursor type: 
;   * Link:  "https://docs.gtk.org/gdk3/enum.CursorType.html"
;   * Blank: -2
;
; - ScrollRange:
;   * Auto scrolling range for mouse delta

CompilerIf #PB_Compiler_OS = #PB_OS_Linux
  
  ImportC ""
    gtk_widget_get_window(widget)
    gdk_get_default_root_window()
    gdk_window_get_cursor(window)
  EndImport
  
  Structure udtMouseData
    IsWindow.i
    Window.i
    WindowID.i
    WindowGDK.i
    IsMenu.i
    CursorDefault.i
    CursorScreen.i
    CursorState.i
    x.l
    y.l
    lastX.l
    lastY.l
    deltaX.l
    deltaY.l
    menuHeight.l
    scrollRange.l
    screenWidth.l
    screenHeight.l
  EndStructure
  
  Global MyMouseData.udtMouseData
  
  Procedure InitWindowMouse(Window = 0, CursorDefault = 0, CursorScreen = 130, ScrollRange = 25)
    Protected PosX.l, PosY.l
    With MyMouseData
      ; Get Window Data
      If IsWindow(Window)
        \IsWindow = #True
        \Window = Window
        \WindowID = WindowID(Window)
        \WindowGDK = gtk_widget_get_window(\WindowID)
        If IsMenu(0)
          \IsMenu = #True
          \menuHeight = MenuHeight()
        EndIf
      Else
        \WindowGDK = gdk_get_default_root_window()
      EndIf
      ; Define Cursor Data
      If CursorDefault
        \CursorDefault = gdk_cursor_new_(CursorDefault)
      Else
        \CursorDefault = gdk_window_get_cursor(\WindowGDK)
      EndIf
      \CursorScreen = gdk_cursor_new_(CursorScreen); Blank = -2
      gdk_window_set_cursor_(\WindowGDK, \CursorScreen)
      ; Scroll Range
      \scrollRange = ScrollRange
      \screenWidth = ScreenWidth()
      \screenHeight = ScreenHeight()
      ; Get Positions
      If IsWindow(Window)
        gtk_widget_get_pointer_(\WindowID, @PosX, @PosY)
        \lastX = PosX
        \lastY = PosY
      Else
        \x = DesktopMouseX()
        \y = DesktopMouseY()
        \lastX = \x
        \lastY = \y
      EndIf
    EndWith
    ProcedureReturn #True
  EndProcedure
  
  Procedure RestoreMouse()
    Protected window, cursor
    If OpenWindow(0, 0, 0, 0, 0, "Restore Mouse Cursor", #PB_Window_Invisible)
      window = gdk_get_default_root_window()
      cursor = gdk_cursor_new_(68)
      If window
        gdk_window_set_cursor_(window, cursor)
      EndIf
    EndIf
  EndProcedure
  
  ; ----
  
  Procedure.f MyMouseX()
    ProcedureReturn MyMouseData\x
  EndProcedure
  
  Procedure.f MyMouseY()
    ProcedureReturn MyMouseData\y
  EndProcedure
  
  Procedure.f MyMouseDeltaX()
    ProcedureReturn MyMouseData\deltaX
  EndProcedure
  
  Procedure.f MyMouseDeltaY()
    ProcedureReturn MyMouseData\deltaY
  EndProcedure
  
  Procedure MyReleaseMouse(State)
    With MyMouseData
      \CursorState = State
      If \WindowGDK
        If State
          gdk_window_set_cursor_(\WindowGDK, \CursorDefault)
        Else
          gdk_window_set_cursor_(\WindowGDK, \CursorScreen)
        EndIf
      EndIf
    EndWith
  EndProcedure
  
  Procedure MyExamineMouse()
    Protected PosX.l, PosY.l
    
    With MyMouseData
      If \IsWindow
        gtk_widget_get_pointer_(\WindowID, @PosX, @PosY)
        If \IsMenu
          PosY - \menuHeight
        EndIf
        If PosX < 0
          PosX = 0
        ElseIf PosX >= \screenWidth
          PosX = \screenWidth - 1
        EndIf
        If PosY < 0
          PosY = 0
        ElseIf PosY >= \screenHeight
          PosY = \screenHeight - 1
        EndIf
      Else
        PosX = DesktopMouseX()
        PosY = DesktopMouseY()
      EndIf
      
      \x = PosX
      \y = PosY
      
      If \CursorState
        \deltaX = 0
        \deltaY = 0
      Else
        \deltaX = PosX - \lastX
        \deltaY = PosY - \lastY
      EndIf
      \lastX = PosX
      \lastY = PosY
      
      If PosX < \scrollRange
        \lastX = \scrollRange
        If \deltaX > \scrollRange
          \deltaX = \scrollRange
        EndIf
      ElseIf PosX > \screenWidth - \scrollRange
        \lastX = \screenWidth - \scrollRange
        If \deltaX < -\scrollRange
          \deltaX = -\scrollRange
        EndIf
      Else
        \lastX = PosX
      EndIf
      If PosY < \scrollRange
        \lastY = \scrollRange
        If \deltaY > \scrollRange
          \deltaY = \scrollRange
        EndIf
      ElseIf PosY > \screenHeight - \scrollRange
        \lastY = \screenHeight - \scrollRange
        If \deltaY < -\scrollRange
          \deltaY = -\scrollRange
        EndIf
      Else
        \lastY = PosY
      EndIf
    EndWith
    ProcedureReturn #True
    
  EndProcedure
  
  ;-- Macros
  Macro MouseX()
    MyMouseX()
  EndMacro
  
  Macro MouseY()
    MyMouseY()
  EndMacro
  
  Macro MouseDeltaX()
    MyMouseDeltaX()
  EndMacro
  
  Macro MouseDeltaY()
    MyMouseDeltaY()
  EndMacro
  
  Macro ReleaseMouse(State)
    MyReleaseMouse(State)
  EndMacro
  
  Macro ExamineMouse()
    MyExamineMouse()
  EndMacro
  
CompilerElse
  Procedure InitWindowMouse(Window = 0, CursorDefault = 0, CursorScreen = 130, ScrollRange = 25)
    ; do nothing
  EndProcedure
  
  Procedure RestoreMouse()
    ; do nothing
  EndProcedure
CompilerEndIf

Procedure FrameDelay(Frames = 30)
  Static time
  Protected diff_time, delay_time
  If time
    diff_time = ElapsedMilliseconds() - time
    delay_time = (1000 / Frames) - diff_time
    If delay_time > 0
      Delay(delay_time)
    EndIf
  EndIf
  time = ElapsedMilliseconds()
EndProcedure

;-- End
; IDE Options = PureBasic 6.00 LTS (Linux - x64)
; CursorPosition = 253
; FirstLine = 174
; Folding = ----
; EnableXP
; DPIAware