Print Page - Working with ListView Control - How to capture item on LV click?

Title: Working with ListView Control - How to capture item on LV click?
Post by: Noble D. Bell on December 02, 2007, 09:45:18 AM

Hello,

I am working with the ListView control. I have a form setup that has a LV control and a textbox control. I have several items in the LV and I want the user to be able to click on one of the items in the LV control and have the text display in the textbox control. This is the code that I am using:

Code Select


Function FRMCREATE_LVCREATEDFIELDS_LVN_ITEMCHANGED ( _
                                                   ControlIndex  As Long,            _  ' index in Control Array
                                                   hWndForm      As Dword,           _  ' handle of Form
                                                   hWndControl   As Dword,           _  ' handle of Control
                                                   ByVal lpNMV   As NM_LISTVIEW Ptr  _  ' pointer to NM_LISTVIEW
                                                   ) As Long  
                                                   
	Local sl As String   
	Local lIndex As Long
	
	lIndex = FF_ListView_GetSelectedItem(HWND_FRMCREATE_LVCREATEDFIELDS)
	FF_ListView_SetSelectedItem (HWND_FRMCREATE_LVCREATEDFIELDS,lIndex) 
	
	
	sl = FF_ListView_GetItemText (HWND_FRMCREATE_LVCREATEDFIELDS, lIndex  , 0)
	FF_TextBox_SetText HWND_FRMCREATE_TXTCREATEFIELD, sl
End Function

It does not appear to work properly. Can someone suggest a good way to achieve what I am after?

Thanks,
Noble

Title: Re: Working with ListView Control - How to capture item on LV click?
Post by: TechSupport on December 02, 2007, 03:00:43 PM

You need to access the members of the incoming NM_LISTVIEW to get the current ListView position during the LV_ITEMCHANGED message.

Try changing your code to the following:

Code Select


Function FRMCREATE_LVCREATEDFIELDS_LVN_ITEMCHANGED ( _
                                                   ControlIndex  As Long,            _  ' index in Control Array
                                                   hWndForm      As Dword,           _  ' handle of Form
                                                   hWndControl   As Dword,           _  ' handle of Control
                                                   ByVal lpNMV   As NM_LISTVIEW Ptr  _  ' pointer to NM_LISTVIEW
                                                   ) As Long  
                                                   
	Local sl As String   
	Local lIndex As Long
	
	lIndex = @lpNMV.iItem
	
	sl = FF_ListView_GetItemText (HWND_FRMCREATE_LVCREATEDFIELDS, lIndex  , 0)
	FF_TextBox_SetText HWND_FRMCREATE_TXTCREATEFIELD, sl
End Function

Title: Re: Working with ListView Control - How to capture item on LV click?
Post by: Noble D. Bell on December 02, 2007, 07:14:10 PM

Yep. That did the trick. Just curious, where can I find doc's on that? In a Windows API file?
nb

Title: Re: Working with ListView Control - How to capture item on LV click?
Post by: TechSupport on December 02, 2007, 07:43:04 PM

Yes, browse through the old Win32 api help file. It has sections on all the basics. It is not a hard read. PowerBASIC still has a copy of the help file: http://www.powerbasic.com/support/downloads/files/Win32API.zip

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Support Forums => Other Software and Code => Topic started by: Noble D. Bell on December 02, 2007, 09:45:18 AM