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ChrisW

Scrolling in list boxes created with _GuiCtrlListBox_Create

4 posts in this topic

I need to use the advanced function _GuiCtrlListBox_Create to create a list box which allows multiple selection. However, the control created in this way seems to lack a vertical scrollbar despite the fact that there are too many items to display. I'm creating the list empty, and then adding items with _GUICtrlListBox_AddString - maybe this doesn't trigger a check for whether a scrollbar is necessary after the latest addition? Is there a way to force this - I tried using the $LBS_DISABLENOSCROLL style but makes no difference?

$hgui = GUICreate("Title", 310, 425)
$list = _GuiCtrlListBox_Create($hgui, "", 5, 5, 300, 400, $LBS_EXTENDEDSEL)
$ok = GUICtrlCreateButton("Start",80, 393, 70, 25, $BS_DEFPUSHBUTTON)
$cancel = GUICtrlCreateButton("Cancel",155,393, 70, 25)
GUISetState()

;Read list into GUI
_GUICtrlListBox_BeginUpdate($list)
While 1
    $line = FileReadLine($conffile)
    ;Stop at end of file
    If @error = -1 Then ExitLoop
    _GUICtrlListBox_AddString($list, $line)
WEnd
FileClose($conffile)
_GUICtrlListBox_EndUpdate($list)

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#2 ·  Posted (edited)

ChrisW,

A well-known trap for the unwary! As soon as you define a style for any control, you overwrite the default styles and have to add them back in if you still require them.

So as the default styles for _GUICtrlListBox_Create are: $LBS_SORT, $WS_HSCROLL, $WS_VSCROLL, $WS_BORDER, you will have to add any of those you want to your additional style using BitOR. It is important to use BitOR; simple addition works sometimes, but can lead to a lot of headscratching when it does not - and I speak from bitter experience!

So if you change your ListBox creation line to read:

$list = _GuiCtrlListBox_Create($hgui, "", 5, 5, 300, 400, BitOr($WS_VSCROLL, $LBS_EXTENDEDSEL))

you should find your scroll bar back again (I did when I tried it). >_<

M23

P.S. Welcome the Autoit forums, by the way!

Edited by Melba23

Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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I need to use the advanced function _GuiCtrlListBox_Create to create a list box which allows multiple selection. However, the control created in this way seems to lack a vertical scrollbar despite the fact that there are too many items to display. I'm creating the list empty, and then adding items with _GUICtrlListBox_AddString - maybe this doesn't trigger a check for whether a scrollbar is necessary after the latest addition? Is there a way to force this - I tried using the $LBS_DISABLENOSCROLL style but makes no difference?

$hgui = GUICreate("Title", 310, 425)
$list = _GuiCtrlListBox_Create($hgui, "", 5, 5, 300, 400, $LBS_EXTENDEDSEL)
$ok = GUICtrlCreateButton("Start",80, 393, 70, 25, $BS_DEFPUSHBUTTON)
$cancel = GUICtrlCreateButton("Cancel",155,393, 70, 25)
GUISetState()

;Read list into GUI
_GUICtrlListBox_BeginUpdate($list)
While 1
    $line = FileReadLine($conffile)
    ;Stop at end of file
    If @error = -1 Then ExitLoop
    _GUICtrlListBox_AddString($list, $line)
WEnd
FileClose($conffile)
_GUICtrlListBox_EndUpdate($list)

Preferred to use GUICtrlCreateListView().

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Thanks M23 that's just what I was after.

Yashied thanks for the suggestion but I think a ListView is overkill here.

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