Each Listbox item with a different colour

[Milleniux]

I would like to add an item to a listbox and give it a different colour to another item in the same listbox. I shall accept all help graciously.

Thanx

[johnpc]

It can't be done. The ListBox Foreground Property sets the color of the Text for the
complete ListBox.

If you wanted just one line of data to have
a different color you could make three ListBoxes with the top and bottom red and the middle blue. Then you would show the line that you wanted to highlight in the middle box, however this takes quite a bit of coding

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[Milleniux]

Surely there has to be a way to do it.
There is so many other spectacular things than can be achieved using VB, yet you cant have a list of items of different colours.

M.

[Aaron Young]

Sure it can be done, just not easily, here's the code I created and posted a while back, it adds the Items to the Listbox with Different Colored Backgrounds, but can be easily modified to have different colored ForeColors instead:

Add a Listbox to a Form with the Style set to 1 - Checkbox

In a Module..

Option Explicit

Public Type RECT
        Left As Long
        Top As Long
        Right As Long
        Bottom As Long
End Type

Public Type DRAWITEMSTRUCT
        CtlType As Long
        CtlID As Long
        itemID As Long
        itemAction As Long
        itemState As Long
        hwndItem As Long
        hdc As Long
        rcItem As RECT
        itemData As Long
End Type

Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)

Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Public Declare Function CreateSolidBrush Lib "gdi32" (ByVal crColor As Long) As Long
Public Declare Function FillRect Lib "user32" (ByVal hdc As Long, lpRect As RECT, ByVal hBrush As Long) As Long
Public Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Public Declare Function SetBkColor Lib "gdi32" (ByVal hdc As Long, ByVal crColor As Long) As Long
Public Declare Function SetTextColor Lib "gdi32" (ByVal hdc As Long, ByVal crColor As Long) As Long
Public Declare Function TextOut Lib "gdi32" Alias "TextOutA" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal lpString As String, ByVal nCount As Long) As Long
Public Declare Function DrawFocusRect Lib "user32" (ByVal hdc As Long, lpRect As RECT) As Long
Public Declare Function GetSysColor Lib "user32" (ByVal nIndex As Long) As Long

Public Const COLOR_HIGHLIGHT = 13
Public Const COLOR_HIGHLIGHTTEXT = 14
Public Const COLOR_WINDOW = 5
Public Const COLOR_WINDOWTEXT = 8
Public Const LB_GETTEXT = &H189
Public Const WM_DRAWITEM = &H2B
Public Const GWL_WNDPROC = (-4)
Public Const ODS_FOCUS = &H10
Public Const ODT_LISTBOX = 2

Public lPrevWndProc As Long

Public Function SubClassedList(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    Dim tItem As DRAWITEMSTRUCT
    Dim sBuff As String * 255
    Dim sItem As String
    Dim lBack As Long
    
    If Msg = WM_DRAWITEM Then
        'Redraw the listbox
        'This function only passes the Address of the DrawItem Structure, so we need to
        'use the CopyMemory API to Get a Copy into the Variable we setup:
        Call CopyMemory(tItem, ByVal lParam, Len(tItem))
        'Make sure we're dealing with a Listbox
        If tItem.CtlType = ODT_LISTBOX Then
            'Get the Item Text
            Call SendMessage(tItem.hwndItem, LB_GETTEXT, tItem.itemID, ByVal sBuff)
            sItem = Left(sBuff, InStr(sBuff, Chr(0)) - 1)
            If (tItem.itemState And ODS_FOCUS) Then
                'Item has Focus, Highlight it, I'm using the Default Focus
                'Colors for this example.
                lBack = CreateSolidBrush(GetSysColor(COLOR_HIGHLIGHT))
                Call FillRect(tItem.hdc, tItem.rcItem, lBack)
                Call SetBkColor(tItem.hdc, GetSysColor(COLOR_HIGHLIGHT))
                Call SetTextColor(tItem.hdc, GetSysColor(COLOR_HIGHLIGHTTEXT))
                TextOut tItem.hdc, tItem.rcItem.Left, tItem.rcItem.Top, ByVal sItem, Len(sItem)
                DrawFocusRect tItem.hdc, tItem.rcItem
            Else
                'Item Doesn't Have Focus, Draw it's Colored Background
                'Create a Brush using the Color we stored in ItemData
                lBack = CreateSolidBrush(tItem.itemData)
                'Paint the Item Area
                Call FillRect(tItem.hdc, tItem.rcItem, lBack)
                'Set the Text Colors
                Call SetBkColor(tItem.hdc, tItem.itemData)
                Call SetTextColor(tItem.hdc, IIf(tItem.itemData = vbBlack, vbWhite, vbBlack))
                'Display the Item Text
                TextOut tItem.hdc, tItem.rcItem.Left, tItem.rcItem.Top, ByVal sItem, Len(sItem)
            End If
            Call DeleteObject(lBack)
            'Don't Need to Pass a Value on as we've just handled the Message ourselves
            SubClassedList = 0
            Exit Function
                    
        End If
            
    End If
    SubClassedList = CallWindowProc(lPrevWndProc, hwnd, Msg, wParam, lParam)
End Function

In the Form..

Private Sub Form_Load()
    Dim I As Integer
    For I = 0 To 15
        'Load a List of 0 to 15 with the Item Data
        'Set to the QBColors 0 - 15
        List1.AddItem "Color " & I
        List1.itemData(List1.NewIndex) = QBColor(I)
    Next
    'Subclass the "Form", to Capture the Listbox Notification Messages
    lPrevWndProc = SetWindowLong(hwnd, GWL_WNDPROC, AddressOf SubClassedList)
End Sub

Private Sub Form_Unload(Cancel As Integer)
    'Release the SubClassing, Very Import to Prevent Crashing!
    Call SetWindowLong(hwnd, GWL_WNDPROC, lPrevWndProc)
End Sub

------------------
Aaron Young
Analyst Programmer
[email protected]
[email protected]

[Milleniux]

Cheers Aaron ... Works great!

[Cimperiali]

Hi, man!
Happy to read from you again!

Cesare Imperiali
(ex Codeguru Rater)

[vishalpatel]

dear friends,


actully i want toset diffrent back color of each items of a listbox.

i have tried "Aaron Young "'s code , its working but the style property which we set to "Checkbox" at design time ,though the checkboxes were not displyed when we run this code.


so can u suggest me to wht should i do if iwant to set diff back /fore color of each item and also want to checkboxes of each item?


vishal patel

[toughcoder]

3 cheers for Aaron. Gr8 code buddy

[crptcblade]

Originally posted by vishalpatel
dear friends,


actully i want toset diffrent back color of each items of a listbox.

i have tried "Aaron Young "'s code , its working but the style property which we set to "Checkbox" at design time ,though the checkboxes were not displyed when we run this code.


so can u suggest me to wht should i do if iwant to set diff back /fore color of each item and also want to checkboxes of each item?


vishal patel

The listbox is set to owner drawn when it displays checkboxes. You are overriding the default code that draws each listitem, so you'll have to draw the checkboxes yourself as well.

[vishalpatel]

tell me first how can i draw checkbox manually?

do u meto say using putting checkboxcontrol over listbox?

plz explain me again.

or giv me code of doing so


vishal

[toughcoder]

Hello vishal,
u shud draw the checkbox using the API calls like Line, Rectangle. I mean draw the basic checkbox look like a windows control. Search around on www.planet-source-code.com for some examples.

[crptcblade]

The DrawFrameControl will do it as well.

http://msdn.microsoft.com/library/de...tdraw_4b3g.asp

[Bombdrop]

You could also have a look at the following FREE activeX control MBListEX Control Yhis allows tou to have different fonts for each list item change back colour for each item and also to add pic to each iteam pluse helps with search of the Listbox all in in a great control

Hope this helps

[vishalpatel]

thanx Bombdrop,


but as i have mention previously. irequired the listbox with checkbox and the diffrent back color for each item.


as u have told the control "MBListEX Control " do the diffrent back color for each item but not have any property to diplay item with checkbox .



so do u have any other suggetion.

if , then plz help me.

waiting for ur reply and agin thax.


vishal

[MKaufman]

I have implemented the code to set the listbox items to different colors and it works great. My issue is that I want the user to be able to multi-select in the listbox and they can not do that if the style is set to have checkboxes. Is there any way I can work around this?

[jmsrickland]

Don't add to an old thread 10 years old. Instead, start a new thread and put a link to this one if you want to add a reference to it.

[DataMiser]

Even older than that. Apparently someone revived it about 10 years ago but the thread was started in 1999 !

[georgekar]

Maybe MKaufman you need a glist control...
Look here http://www.vbforums.com/showthread.p...rius-Selectors

The glist4 control have events for item drawing (if you want it). There are some selectors and one is for color picking. That selector displays 16Milion items with the right background...exposing the rectangle for drawing and using a "bypass" way to setup a fake list (the list of 16Milions...exist only for the user, not internally).
The code of Aaron Young is very good..but uses the same old listbox. The new listbox has no dependencies for common controls, also the scroll bar is internally drawing..using three shapes. Is unicode capable (need unicode font), and can hold a very big number of item...internally or can be driven external (as you can see the Fileselector and TextViewer use own data structures, but displayed through the listbox).

[Nightwalker83]

I think MartinLiss created a demo in the VB6 and Earlier codebank which showed how to do this.