How to set initial selection for ListIconGadget

Neil · **Posted:** Tue Mar 13, 2012 2:38 am

Hi,

I want to set an intial selection for a ListIconGadget (based on data read from a user's config file).

I can do this very simply for a ListViewGadget using SetGadgetText (which works really well).

Is there an equivalent function for a ListIconGadget ??

The Help file appears to imply there isn't !!

It only mentions ListViewGadget:

ListViewGadget(): selects the item that exactly matches the given text

Is there a way to do this for a ListIconGadget ??

Thanks,

Neil

USCode · **Posted:** Tue Mar 13, 2012 3:06 am

Hi Neil,
SetGadgetState() will select an item for you in ListIconGadget. You just provide as arguments the gadget and item (line number) you want selected.

Neil · **Posted:** Tue Mar 13, 2012 3:18 am

Hi USCode,

Ahh that's the problem - I don't know the line number.

SetGadgetText will find the line number and make it the current selection.

Code:

SetGadgetText(#Gadget_Main_lServers, "find this value")

Neil

Derren · **Joined:** Sat Jul 23, 2011 1:13 am **Posts:** 61

It's always best to store the gadged-data in variables, lists or arrays.
Working off the gadget with GetGadgetState() etc is not the best method.

Better work with an array and update the gadget accordingly.

Code:

Dim Array.s(4)
Array(0) = "Bla"
Array(1) = "Blubb"
Array(2) = "Bli Bla Bleh"
Array(3) = "Shoop di Whoop"

OpenWindow(0, 0, 0, 400, 300, "ListIcon", #PB_Window_ScreenCentered|#PB_Window_SystemMenu)
ListIconGadget(0, 0, 0, 400, 300, "Data", 390,  #PB_ListIcon_FullRowSelect)
;ListViewGadget(0, 0, 0, 400, 300)

For a = 0 To 3
   AddGadgetItem(0, a, Array(a))
Next

For a = 0 To 3
   If Array(a) = "Bli Bla Bleh"
      SetGadgetState(0,a)
   EndIf 
Next 

Repeat    
Until WaitWindowEvent()=#PB_Event_CloseWindow 

I don't know why but nothing is selected with a ListIconGadget. It works fine with the ListView.

SetGadgetItemState(0, a, #PB_ListIcon_Selected) doesn't seem to work either

USCode · **Posted:** Tue Mar 13, 2012 4:43 am

Neil wrote:

Ahh that's the problem - I don't know the line number.

SetGadgetText will find the line number and make it the current selection.

Just loop through the list column you want to search and when you find the desired text (using GetGadgetItemText(), call SetGadgetState().

Neil · **Posted:** Tue Mar 13, 2012 5:36 am

ok - I worked out how to do this using:

Code:

CountGadgetItems(#Gadget_Main_lProjects)

and then looping through the values.

It would be a lot easier if there was a single function as per ListViewGadget !!

Anyway, my question now is:

How do I make the selection centred vertically in the List gadget on the form?

My list is a lot longer than the space on the form.

Thanks,

Neil

IdeasVacuum · **Posted:** Tue Mar 13, 2012 7:33 am

If your app is Windows only, take a look at Gnozal's PureLVSORT library, which does a lot more than sort.

http://gnozal.ucoz.com/

Neil · **Posted:** Tue Mar 13, 2012 8:06 am

Hey that's got it.

Code:

PureLVSORT_ScrollToRow(#Gadget_Main_lProjects, i)

Good old gnozal to the rescue again !!

Thanks,

Neil

Fangbeast · **Joined:** Fri Apr 25, 2003 3:08 pm **Posts:** 3011

Windows only, no lib needed.

; Make sure the line (i) is visible

Code:

SendMessage_(GadgetID(#Gadget_Main_lProjects), #LVM_ENSUREVISIBLE, i, 0)

Shardik · **Posted:** Tue Mar 13, 2012 8:56 am

Fangbeast's API call doesn't necessarily center the chosen row. It only
takes care that this row is visible (in most cases as the second row
from the top or bottom). Those who need a cross-platform solution
may take a look into an example for Windows, Linux and MacOS X
which I already posted in the German forum. The Windows code uses
Fangbeast's API call but the Linux and MacOS API calls do indeed center
the row vertically:
http://www.purebasic.fr/german/viewtopi ... 80&start=6

Fangbeast · **Joined:** Fri Apr 25, 2003 3:08 pm **Posts:** 3011

Shardik wrote:

Fangbeast's API call doesn't necessarily center the chosen row.

Whoopsies!

I know I saw something on the forum that could do this but stuffed if I can remember the post now. I'll look later tonight.

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How to set initial selection for ListIconGadget

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