PageUp
PowerScript event
Description
Occurs when the user clicks in the open space above the scroll box
(also called the thumb).
Event ID
|
Event ID |
Objects |
|---|---|
|
pbm_sbnpageup |
VScrollBar, VTrackBar |
Arguments
None
Return Values
Long.
Return code choices (specify in a RETURN statement):
0 — Continue processing
Usage
When the user clicks in a vertical scroll bar, nothing happens
unless you have scripts that change the scroll bar’s Position
property:
-
For the scroll bar arrows, use the LineUp and LineDown
events. -
For clicks in the scroll bar background above and below the
thumb, use the PageUp and PageDown events. -
For dragging the thumb itself, use the Moved event.
Examples
Example 1
This code in the PageUp event causes the thumb to move up when the
user clicks on the up arrow of the vertical scroll bar (the page size is
stored in the instance variable ii_pagesize):
|
1 2 3 4 5 6 |
IF This.Position < & This.MinPosition + ii_pagesize THEN This.Position = MinPosition ELSE This.Position = This.Position - ii_pagesize END IF |
Example 2
This example changes the position of the scroll box by a
predetermined page size stored in the instance variable ii_pagesize and
scrolls backwards through a DataWindow control 10 rows for each
page:
|
1 2 3 4 5 6 |
long ll_currow, ll_prevrow This.Position = This.Position - ii_pagesize ll_currow = dw_1.GetRow( ) ll_prevrow = ll_currow - 10 dw_1.ScrollToRow(ll_prevrow) dw_1.SetRow(ll_prevrow) |
See also