Syntax
1: For Listboxes
Description
Occurs when an item is selected in the control.
Event ID
|
Event ID |
Objects |
|---|---|
|
pbm_cbnselchange |
DropDownListBox, |
|
pbm_lbnselchange |
ListBox, PictureListBox |
Arguments
|
Argument |
Description |
|---|---|
|
index |
Integer by value (the index of the item that has |
Return Values
Long.
Return code choices (specify in a RETURN statement):
0 — Continue processing
Usage
For DropDownListBoxes, the SelectionChanged event applies to
selections in the drop-down portion of the control, not the edit
box.
The SelectionChanged event occurs when the user clicks on any item
in the list, even if it is the currently selected item. When the user
makes a selection using the mouse, the Clicked (and if applicable the
DoubleClicked event) occurs after the SelectionChanged event.
Examples
This example is for the lb_value ListBox in the window
w_graph_sheet_with_list in the PowerBuilder Examples application. When
the user chooses values, they are graphed as series in the graph gr_1.
The MultiSelect property for the ListBox is set to true, so index has no
effect. The script checks all the items to see if they are
selected:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
integer itemcount,i,r string ls_colname gr_1.SetRedraw(FALSE) // Clear out categories, series and data from graph gr_1.Reset(All!) // Loop through all selected values and // create as many series as the user specified FOR i = 1 to lb_value.TotalItems() IF lb_value.State(i) = 1 THEN ls_colname = lb_value.Text(i) // Call window function to set up the graph wf_set_a_series(ls_colname, ls_colname, & lb_category.text(1)) END IF NEXT gr_1.SetRedraw(TRUE) |
See also