PureLVSORT library : sorting ListIconGadgets (and more)

QuimV · **Posted:** Thu Apr 22, 2010 7:04 pm

Hi,
I'm testing the Filter Callback Function (in windows 7 and PB 4.41) using this code:

Code:

Procedure MyFilterCallback(GadgetNumber.l, FilterString.s, ListIconColumn.l, EventCode.l) ; simple search example
  Protected itemNumber.l, I.l
  
  Debug FilterString 
  
  If FilterString 
    itemNumber = -1
    If IsGadget(GadgetNumber)
      ; Search for string
      For I = 0 To CountGadgetItems(GadgetNumber) - 1 
        If FilterString = GetGadgetItemText(GadgetNumber, I, ListIconColumn) 
          itemNumber = I
          Break
        EndIf 
      Next 
      ;
      If itemNumber <> -1 ; if string found, scroll to row
        PureLVSORT_ScrollToRow(GadgetNumber, itemNumber)
        SetGadgetItemState(GadgetNumber, itemNumber, GetGadgetItemState(GadgetNumber, itemNumber) | #PB_ListIcon_Selected)
      EndIf
    EndIf
  EndIf
EndProcedure
;
#Window_0 = 0 
#ListIcon_0 = 0 
;
Procedure Open_Window_0() 
  If OpenWindow(#Window_0, 216, 0, 602, 302, "PureLVSORT Test",  #PB_Window_SystemMenu | #PB_Window_TitleBar | #PB_Window_ScreenCentered) 
      ListIconGadget(#ListIcon_0, 5, 5, 590, 285, "String", 110) 
      AddGadgetColumn(#ListIcon_0, 1, "Numeric", 110) 
      AddGadgetColumn(#ListIcon_0, 2, "Float", 110) 
      AddGadgetColumn(#ListIcon_0, 3, "DateDDMMYYYY", 120) 
      AddGadgetColumn(#ListIcon_0, 4, "DateMMDDYYYY", 120) 
      AddGadgetItem(#ListIcon_0, -1, "ABCDE" + Chr(10) + "514" + Chr(10) + "0.9" + Chr(10) + "31/12/2004" + Chr(10) + "12/31/2004") 
      AddGadgetItem(#ListIcon_0, -1, "ACDEF" + Chr(10) + "118" + Chr(10) + "1.9" + Chr(10) + "11/12/2004" + Chr(10) + "12/11/2004") 
      AddGadgetItem(#ListIcon_0, -1, "ZABCD" + Chr(10) + "-414" + Chr(10) + "7.0" + Chr(10) + "21/01/2003" + Chr(10) + "01/21/2003") 
      AddGadgetItem(#ListIcon_0, -1, "DEFGH" + Chr(10) + "524" + Chr(10) + "900" + Chr(10) + "10/06/2001" + Chr(10) + "06/10/2001") 
  EndIf 
EndProcedure 
;
Open_Window_0() 
;
If PureLVSORT_SelectGadgetToSort(#ListIcon_0, #PureLVSORT_ShowClickedHeader_IconLeft) = #PureLVSORT_Ok 
  PureLVSORT_SetColumnType(#ListIcon_0, 0, #PureLVSORT_String) ; default, not necessary 
  PureLVSORT_SetColumnType(#ListIcon_0, 1, #PureLVSORT_Numeric) 
  PureLVSORT_SetColumnType(#ListIcon_0, 2, #PureLVSORT_Float) 
  PureLVSORT_SetColumnType(#ListIcon_0, 3, #PureLVSORT_DateDDMMYYYY) 
  PureLVSORT_SetColumnType(#ListIcon_0, 4, #PureLVSORT_DateMMDDYYYY) 
  PureLVSORT_SortListIconNow(#ListIcon_0, 3, 1)
  PureLVSORT_DefineFilterCallback(@MyFilterCallback())
  PureLVSORT_SetFilterTimeOut(100)
  PureLVSORT_SetFilter(#ListIcon_0)
EndIf 
; 
Repeat 
  Event = WaitWindowEvent() 
Until Event = #PB_Event_CloseWindow 
End

and I have found that when I erase a previous FilterString entered by keyboard, the callback function receive a FilterString strange (look at "Debug FilterString "), that is not "" (empty).

Thats only occurs in W7! in WXPSP3 all runs fine.

Thanks for your help

gnozal · **Posted:** Fri Apr 23, 2010 11:33 am

QuimV wrote:

:) Hi,
I'm testing the Filter Callback Function (in windows 7 and PB 4.41) ... and I have found that when I erase a previous FilterString entered by keyboard, the callback function receive a FilterString strange (look at "Debug FilterString "), that is not "" (empty).
Thats only occurs in W7! in WXPSP3 all runs fine.

I don't have Se7en, so I can only imagine what's going wrong.
Anyway, I made a little change.
Could you test http://freenet-homepage.de/gnozal/PureLVSORT_TEST.zip (PB4.50 ANSI library version, copy to \PureBasic450\PureLibraries\UserLibraries\) ?

QuimV · **Posted:** Fri Apr 23, 2010 12:21 pm

Hi gnozal,

The behaviour continue being wrong. I mean that when I erase the string entered by the keyboard, the gadget callback function receive a string different from "" (void string), in fact the string received by the callback function is garbage.

Thanks

gnozal · **Posted:** Fri Apr 23, 2010 12:55 pm

QuimV wrote:

:( Hi gnozal,

The behaviour continue being wrong. I mean that when I erase the string entered by the keyboard, the gadget callback function receive a string different from "" (void string), in fact the string received by the callback function is garbage.

Ok another try : I have updated http://freenet-homepage.de/gnozal/PureLVSORT_TEST.zip (PB4.50 ANSI library version, copy to \PureBasic450\PureLibraries\UserLibraries\).

QuimV · **Posted:** Fri Apr 23, 2010 1:21 pm

Nothing good. The same behaviour.
Thanks

gnozal · **Posted:** Fri Apr 23, 2010 1:33 pm

QuimV wrote:

:( Nothing good. The same behaviour.
Thanks

ye old code looks like this (ANSI PB4.xx version)

Code:

...
        ElseIf *pNMHdr\hdr\code = #HDN_FILTERCHANGE Or *pNMHdr\hdr\code = #HDN_FILTERBTNCLICK ; filter string changed
          ; hHDItem.HDITEM, TFilter.HDTEXTFILTER
          TmpHeaderText = Space(#MAX_pszText + 1)
          TFilter\pszText = @TmpHeaderText
          TFilter\cchTextMax = #MAX_pszText
          hHDItem\mask = #HDI_FILTER 
          hHDItem\type = #HDFT_ISSTRING 
          hHDItem\pvFilter = @TFilter 
          hHeader = SendMessage_(WindowId, #LVM_GETHEADER, 0, 0) ; <--- get header handle
          If hHeader
            SendMessage_(hHeader,#HDM_GETITEM,*pNMHdr\iItem,@hHDItem) ; <--- get filter text
            If PureLVSORT_FilterCallBack
              CallFunctionFast(PureLVSORT_FilterCallBack, GetDlgCtrlID_(WindowId), TFilter\pszText, *pNMHdr\iItem, *pNMHdr\hdr\code) ; passes info to the user callback
...

I don't know where the problem might be...

QuimV · **Posted:** Fri Apr 23, 2010 7:28 pm

Hi,

Would it be possible that you send a number to the callback filter function (TFilter\pszText) while the function should receive a string?

Code:

Procedure MyFilterCallback(GadgetNumber.l, FilterString.s, ListIconColumn.l, EventCode.l)

   TFilter\pszText = @TmpHeaderText

CallFunctionFast(PureLVSORT_FilterCallBack, GetDlgCtrlID_(WindowId), TFilter\pszText, *pNMHdr\iItem, *pNMHdr\hdr\code) ; passes info to the user callback

The problem always appears when the string is zero lenght an only in this case,

I'm sorry, I don't know enough programming to be more efective helping you.

Thanks

gnozal · **Posted:** Sat Apr 24, 2010 9:32 am

QuimV wrote:

Would it be possible that you send a number to the callback filter function (TFilter\pszText) while the function should receive a string?

It is correct imho, it's a pointer to a zero terminated string.
But maybe it's an issue with CallFunctionFast() and Se7en.
I used a prototype instead in this new test lib : http://freenet-homepage.de/gnozal/PureLVSORT_TEST.zip (PB4.50 ANSI library version, copy to \PureBasic450\PureLibraries\UserLibraries\). Please test.

QuimV · **Posted:** Sat Apr 24, 2010 2:27 pm

Same behaviour. Garbage instead nullstring.

QuimV · **Posted:** Sat Apr 24, 2010 3:30 pm

gnozal,
Would it be possible to insert a debug message showing the text filter, at the place marked witn an *** in order to control the text filter that your library has received?

ElseIf *pNMHdr\hdr\code = #HDN_FILTERCHANGE Or *pNMHdr\hdr\code = #HDN_FILTERBTNCLICK ; filter string changed
; hHDItem.HDITEM, TFilter.HDTEXTFILTER
TmpHeaderText = Space(#MAX_pszText + 1)
TFilter\pszText = @TmpHeaderText
TFilter\cchTextMax = #MAX_pszText
hHDItem\mask = #HDI_FILTER
hHDItem\type = #HDFT_ISSTRING
hHDItem\pvFilter = @TFilter
hHeader = SendMessage_(WindowId, #LVM_GETHEADER, 0, 0) ; <--- get header handle
If hHeader
SendMessage_(hHeader,#HDM_GETITEM,*pNMHdr\iItem,@hHDItem) ; <--- get filter text

***
If PureLVSORT_FilterCallBack
CallFunctionFast(PureLVSORT_FilterCallBack, GetDlgCtrlID_(WindowId), TFilter\pszText, *pNMHdr\iItem, *pNMHdr\hdr\code) ; passes info to the user callback

Thank You

QuimV · **Posted:** Sat Apr 24, 2010 5:41 pm

Hi gnozal,

Testing EditCallback function (with W7_32 and PB4.50) I get the next error messages:

- Constant not Found: Case #PureLVSORT_EditStart
- Constant not Found: Case #PureLVSORT_EditText
- Constant not Found: Case #PureLVSORT_EditEnd
- Constant not Found: Case #PureLVSORT_EditEscape

Could you fix it?

Thanks in advanced

gnozal · **Posted:** Mon Apr 26, 2010 10:55 am

Hi QuimV,
I have updated http://freenet-homepage.de/gnozal/PureLVSORT_TEST.zip.
It includes a fixed resident (for the missing constants) and a new library version, which shows the text filter that the library has received as a warning.

Code:

Import "Debugger.lib" 
  DebugWarning(szError.s) As "_PB_DEBUGGER_SendWarning@4" 
EndImport 
...
            SendMessage_(hHeader,#HDM_GETITEM,*pNMHdr\iItem,@hHDItem)
            FilterText = PeekS(TFilter\pszText)
            ;
            DebugWarning("TFilter\pszText = '" + FilterText + "'")
            ;
            If PureLVSORT_FilterCallBack
              PureLVSORT_FilterCallBack(GetDlgCtrlID_(WindowId), FilterText, *pNMHdr\iItem, *pNMHdr\hdr\code)
...

You have to use this library only with debugger enabled and with warning level = 'Display warnings'.

QuimV · **Posted:** Mon Apr 26, 2010 12:22 pm

Hi @gnozal,

This is the debug output that I have received when I enter the string "DEFGH" and erase it letter by letter:

D
DE
DEF
DEFG
DEFGH
DEFG
DEF
DE
D
?/?/adgetStack_4194304

gnozal · **Posted:** Mon Apr 26, 2010 4:37 pm

QuimV wrote:

...
?/?/adgetStack_4194304

Seems the memory is corrupted somehow, but I have no clue why.... the Purifier doesn't catch any problem.
Only with an empty string, and only with Se7en !?
Another try (I have updated http://freenet-homepage.de/gnozal/PureLVSORT_TEST.zip) : I check the TFilter\pszText pointer with IsBadStringPtr_().

QuimV · **Posted:** Tue Apr 27, 2010 8:38 am

This is the result in debug screen, with the word "test".

t
te
tes
test
tes
te
t
C

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PureLVSORT library : sorting ListIconGadgets (and more)

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