PureBasic Forums - English

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;Coloured header control.
;By srod.
;Purebasic 4.
;Windows.


#LVM_GETHEADER = #LVM_FIRST + 31 

; Globals 
Global oldListIconCallback, hHeader, redbrush, bluebrush 
redbrush=CreateSolidBrush_(#Red)
bluebrush=CreateSolidBrush_(#Blue)


; Proc for subclassed ListIconGadget 
Procedure SubclassedListIcon(hwnd, msg, wparam, lparam) 
  Protected hdi.hd_item
  result = CallWindowProc_(oldListIconCallback, hwnd, msg, wparam, lparam) 
  Select msg 
    Case #WM_NOTIFY 
      *pnmh.NMHDR = lparam 
      ;--> Get handle to ListIcon header control 
      If *pnmh\code = #NM_CUSTOMDRAW
        *pnmcd.NMCUSTOMDRAW = lparam 
        ;--> Determine drawing stage 
        Select *pnmcd\dwDrawStage 
          Case #CDDS_PREPAINT 
            result = #CDRF_NOTIFYITEMDRAW 
          Case #CDDS_ITEMPREPAINT 
;Get header text.
            text$=Space(100)
            hdi\mask = #HDI_TEXT
            hdi\psztext = @text$
            hdi\cchtextmax = Len(text$)
            SendMessage_(hHeader, #HDM_GETITEM,*pnmcd\dwItemSpec,hdi)
;Check button state.
            If *pnmcd\uItemState & #CDIS_SELECTED
              DrawFrameControl_(*pnmcd\hdc, *pnmcd\rc, #DFC_BUTTON, #DFCS_BUTTONPUSH|#DFCS_PUSHED)
;Offset text because of the selected button.
              InflateRect_(*pnmcd\rc,-1,-1)
            Else
              DrawFrameControl_(*pnmcd\hdc, *pnmcd\rc, #DFC_BUTTON, #DFCS_BUTTONPUSH)
            EndIf
;Draw background.
;Here we alternate red text on blue background.
            InflateRect_(*pnmcd\rc,-1,-1)
            SetBkMode_(*pnmcd\hdc,#TRANSPARENT) 
            If *pnmcd\dwItemSpec&1
              FillRect_(*pnmcd\hdc, *pnmcd\rc, redbrush)
              SetTextColor_(*pnmcd\hdc, #Blue) 
            Else
              FillRect_(*pnmcd\hdc, *pnmcd\rc, bluebrush)
              SetTextColor_(*pnmcd\hdc, #Red) 
            EndIf
            DrawText_(*pnmcd\hdc, @text$, Len(text$), *pnmcd\rc, #DT_CENTER|#DT_VCENTER|#DT_END_ELLIPSIS)
            result = #CDRF_SKIPDEFAULT
        EndSelect 
      EndIf 
  EndSelect 
  ProcedureReturn result 
EndProcedure 


; ************************************************ 
; Main Window 
; ************************************************ 
If OpenWindow(0, 100, 100, 415, 300, "", #PB_Window_SystemMenu | #PB_Window_ScreenCentered) And CreateGadgetList(WindowID(0)) 
  ListIconGadget(0, 5, 5, 405, 200, "col 0", 50, #PB_ListIcon_FullRowSelect | #PB_ListIcon_AlwaysShowSelection) 
  hHeader = SendMessage_(GadgetID(0), #LVM_GETHEADER, 0, 0) 
;Subclass ListIcon so we can customdraw the header text 
  oldListIconCallback = SetWindowLong_(GadgetID(0), #GWL_WNDPROC, @SubclassedListIcon()) 

;Add 10 more columns.
  For i = 1 To 10
    AddGadgetColumn(0, i, "col "+Str(i), 50) 
  Next  
;Add some data
  For b=0 To 99; Add 100 rows.
    AddGadgetItem(0,-1,"")
  Next
  For i = 0 To 99
    For j = 0 To 50
      SetGadgetItemText(0,i,Str(i+j),j)
    Next j
  Next i            

  Repeat 
    EventID = WaitWindowEvent() 
  Until EventID = #PB_Event_CloseWindow 

  DeleteObject_(redbrush)
  DeleteObject_(bluebrush)
  
EndIf 
End 

Code: Select all

Procedure SubclassedListIcon(hwnd, msg, wparam, lparam)
  Protected hdi.hd_item
  result = CallWindowProc_(form\oldListIconCallback, hwnd, msg, wparam, lparam)
  Select msg
    Case #WM_NOTIFY
      *pnmh.NMHDR = lparam    ;--> Get handle to ListIcon header control
      If *pnmh\code = #NM_CUSTOMDRAW
        *pnmcd.NMCUSTOMDRAW = lparam ;--> Determine drawing stage
        Select *pnmcd\dwDrawStage
          Case #CDDS_PREPAINT
            result = #CDRF_NOTIFYITEMDRAW
          Case #CDDS_ITEMPREPAINT ; Get header text.
            text$ = Space(100)
            hdi\mask = #HDI_TEXT
            hdi\psztext = @text$
            hdi\cchtextmax = Len(text$)
            SendMessage_(hHeader, #HDM_GETITEM, *pnmcd\dwItemSpec, hdi) ; Check button state.
            If *pnmcd\uItemState & #CDIS_SELECTED
              DrawFrameControl_(*pnmcd\hdc, *pnmcd\rc, #DFC_BUTTON, #DFCS_BUTTONPUSH | #DFCS_PUSHED)  ; Offset text because of the selected button.
              InflateRect_(*pnmcd\rc, -1, -1)
            Else
              DrawFrameControl_(*pnmcd\hdc, *pnmcd\rc, #DFC_BUTTON, #DFCS_BUTTONPUSH)
            EndIf ; Draw background. ; Here we alternate red text on blue background.
            InflateRect_(*pnmcd\rc, -1, -1)
            SetBkMode_(*pnmcd\hdc, #TRANSPARENT)
            ;If *pnmcd\dwItemSpec & 1
              FillRect_(*pnmcd\hdc, *pnmcd\rc, Colour)  ; Colour (Global Colour = CreateSolidBrush_(16629401))
              SetTextColor_(*pnmcd\hdc, $000000)
            ;Else
            ;  FillRect_(*pnmcd\hdc, *pnmcd\rc, Colour)
            ;  SetTextColor_(*pnmcd\hdc, $000000)
            ;EndIf
            DrawText_(*pnmcd\hdc, @text$, Len(text$), *pnmcd\rc, #DT_CENTER | #DT_VCENTER | #DT_END_ELLIPSIS)
            result = #CDRF_SKIPDEFAULT
        EndSelect
      EndIf
  EndSelect
  ProcedureReturn result
EndProcedure

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SendMessage_(hHeader, #HDM_GETITEM, *pnmcd\dwItemSpec, hdi) ; Check button state. 

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SendMessage_(*pnmcd\hdr\hwndFrom, #HDM_GETITEM,*pnmcd\dwItemSpec,hdi)