Issues with ListBox

[ksps1024]

Hi,

I'm having issues with the listbox control. I have created a custom page with a listbox, and am populating it with strings read from a file(>1000 lines). The problem I'm experiencing is that while the items are being inserted into the listbox, I do not see them there until the process completes. Now the interesting part is that I can see the vertical scrollbar shrink. Once the file read is complete, then it displays the items in the listbox.....

Below is excerpt for the insertion of the strings.

code:




${NSD_CreateListBox} 0 25 100% 80% " "

pop $listbox



SendMessage $listbox ${LB_INSERTSTRING} -1 "STRelete: $R0"

Any ideas how to get around this?

I'm trying to accomplish something similar to the install part where you can see the details of the installation.

Thanks in advance....

[T.Slappy]

I do not see them there until the process completes

This is OK, because painting of the control is locked and whole control is repainted at the end.
Try to send WM_REDRAW message after each LB_INSERTSTRING - but you will lose a lot of performance!

[ksps1024]

How is this done in the MUI_PAGE_INSTFILES where you can see the items being inserted in the details box (I assume WM_REDRAW is being sent??)

[Afrow UK]

That uses a list view control and inserts items from another thread separate to the UI thread.

Stu

[ksps1024]

Are there any examples out there that mimic the INSTFILES page? If not can you point me in the right direction with the listview?

Thanks

[Afrow UK]

Search Google for "nsis listview".

Stu

[vicokoby]

Please teachme how to get the selected strings in a ListBox with the style ${LBS_MULTIPLESEL}

${NSD_LB_GetSelection} return only a item, I want recover several items.

Please helpme!

[Afrow UK]

These are the messages you can send: http://msdn.microsoft.com/en-us/libr...=vs.85%29.aspx

Stu

[vicokoby]

Please helpme with this issue,

This is a try to get the selected items

!macro Show_Selected_Items ListBox_HWND

StrCpy $0 ${ListBox_HWND} ; $0 = ListBox handle

System::Alloc 1024
Pop $1
StrCpy $2 $1 ; $2 = buffer to store the selected items.

System::Call 'user32::SendMessage(i, i, i, i) i(r0, ${LB_GETSELITEMS}, 100, r2) .r3' ; $3 = Number of selected items; (Max capacity: 100)
StrCpy $4 0 ; $4 = Counter

Next:
IntCmp $4 $3 Done ShowItem Done

ShowItem:
; Here is my problem
; My problem is that not you how to pass the elements from the buffer to the message
; The enclosed Code line is incorrect please helps me to fix it
; That line returns any element of the listbox, not the selected items.

;-------------------------------------------------------------------------------
System::Call 'user32::SendMessage(i, i, i, t) i(r0, ${LB_GETTEXT}, r4, .s) .r6'
;-------------------------------------------------------------------------------

Pop $5 ; $5 = Selected Item (It is what wanted)
MessageBox MB_YESNO "Selected Item: $5 Size: $6$\n$\nDo you want to continue?" IDNO Done
IntOp $4 $4 + 1
Goto Next

Done:
System::Free $1

!macroend

Example complete: ListBoxMultipleSel.nsi


Please give me more help!

[Anders]

Your LB_GETTEXT code is ok, but you need to get the item index out of the array you filled with LB_GETSELITEMS

!macro Show_Selected_Items ListBox_HWND

StrCpy $0 ${ListBox_HWND} ; $0 = ListBox handle

System::Alloc 1024 ; max items would be 1024/4, not 100...
Pop $2


System::Call 'user32::SendMessage(i, i, i, i) i(r0, ${LB_GETSELITEMS}, 100, r2) .r3'
StrCpy $4 0 ; $4 = Counter

Next:
IntCmp $4 $3 Done ShowItem Done

ShowItem:
IntOp $5 $4 * 4
IntOp $5 $5 + $2
System::Call '*$5(i.r5)'

System::Call 'user32::SendMessage(i, i, i, t) i(r0, ${LB_GETTEXT}, r5, .r5) .r6'
MessageBox MB_YESNO "Selected Item: $5 Size: $6$\n$\nDo you want to continue?" IDNO Done

IntOp $4 $4 + 1
Goto Next
Done:
System::Free $2
!macroend

[vicokoby]

Thank you very much!