QPx_GetAreaScrollOffset

QPx_GetAreaScrollOffset(areaRef; hScroll; vScroll; hMaxScroll; vMaxScroll):error
areaRef Longint QPix area reference
hScroll Longint Horizontal scroll offset (pixels)
vScroll Longint Vertical scroll offset (pixels)
hMaxScroll Longint Max horz scroll offset (pixels)
vMaxScroll Longint Max vert scroll offset (pixels)
error Longint Error result

Returns the scroll offsets of a scrollable QPix plug-in area.

The QPix plug-in area is specified by areaRef. If areaRef is not a valid QPix plug-in area reference, qpx_paramErr is returned.

Parameters hScroll and vScroll receive the horizontal and vertical scroll offsets respectively.

Parameters hMaxScroll and vMaxScroll receive the maximum possible offsets for the horizontal and vertical scrollbars.

Example

  `Center image horizontally and vertically
 
C_LONGINT($error)
C_LONGINT($hScroll;$vScroll;$hMaxScroll;$vMaxScroll)
 
$error:=QPx_GetAreaScrollOffset (gQPixArea;$hScroll;$vScroll;$hMaxScroll;$vMaxScroll)
 
If ($error=qpx_noErr)
 
  $hScroll:=$hMaxScroll/2
  $vScroll:=$vMaxScroll/2
 
  $error:=QPx_SetAreaScrollOffset (gQPixArea;$hScroll;$vScroll)
 
End if
 

Related commands

QPx_SetAreaScrollOffset Changes the scroll offsets of a scrollable QPix plug-in area

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