Owner draw ComboBox

[AntoninoP]

Hi everyone, I would like to share a my little experiment with owner draw ComboBox:



Here my code:

Code: Select all  Expand view

#include <fivewin.ch>

function Main()
   local oWnd, oCombo, aItems, cCurr

    DEFINE WINDOW oWnd from 100,100 to 200,400  PIXEL
    aItems := GETFONTNAMES(oWnd:getDc())
    oWnd:ReleaseDC()
    //@ 10,10 COMBOBOX oCombo VAR cCurr ITEMS aItems SIZE 200,25 PIXEL STYLE CBS_DROPDOWNLIST+CBS_OWNERDRAWFIXED
    // precompile the code upper to get the code below
    oCombo := MyCombo():New( 10, 10, { | u | If( PCount()==0, cCurr, cCurr:= u ) }, aItems, ;
                200, 25,,,,,,, .T.,,, .F.,, .F.,{""},,CBS_DROPDOWNLIST+CBS_OWNERDRAWFIXED,,, "oCombo",,,,,,, )
    oCombo:lOwnerDraw := .T.
    ACTIVATE WINDOW oWnd
return 0

class MyCombo inherit TComboBox
    METHOD DrawItem( nIdCtl, nPStruct )
endclass

#define WHITE_BRUSH   0

METHOD DrawItem( nIdCtl, nPStruct ) CLASS MyCombo
    LOCAL aData := GetDrawItemStruct(nPStruct)
    LOCAL hDC := aData[7], aRect := {aData[8],aData[9],aData[10],aData[11]}
    LOCAL cFont, oFont
    if aData[3]>=0
        cFont := ::aItems[aData[3]+1]
    endif
    FillRect(hDC,aRect, GetStockObject( WHITE_BRUSH ) )
    if aData[5]=0
         // unselected item
        //MoveTo(hDC, aData[9], aData[8])
        //LineTo(hDC, aData[11], aData[10])
    else
        // Selected item
        MoveTo(hDC, aData[9], aData[10])
        LineTo(hDC, aData[11], aData[8])
    endif
    if !empty(cFont)
        DEFINE Font oFont NAME cFont
        oFont:Activate(hDC)
        DrawTextEx(hDC,cFont,aRect,1)
        oFont:End()
    endif
return 1

It would be great if FiveWin included a bDrawItem with hDC.

What do you think?

[cnavarro]

I think this is a good idea, when lOwnerDraw := .T.

[AntoninoP]

Another better sample, that uses windows style selected marker

Code: Select all  Expand view

#include <fivewin.ch>
#define CBS_OWNERDRAWVARIABLE 0x0020

function Main()
   local oWnd, oCombo, aItems, cCurr

    DEFINE WINDOW oWnd from 100,100 to 200,400  PIXEL
    aItems := GETFONTNAMES(oWnd:getDc())
    oWnd:ReleaseDC()
    oCombo := MyCombo():New( 10, 10, { | u | If( PCount()==0, cCurr, cCurr:= u ) }, aItems, ;
                200, 25,,,,,,, .T.,,, .F.,, .F.,{""},,CBS_DROPDOWNLIST+CBS_OWNERDRAWFIXED,,, "oCombo",,,,,,, )
    //@ 10,10 COMBOBOX oCombo VAR cCurr ITEMS aItems SIZE 200,25 PIXEL
    oCombo:lOwnerDraw := .T.
    //oCombo:WinStyle(CBS_OWNERDRAWFIXED,.T.)

    ACTIVATE WINDOW oWnd
return 0

//procedure InitDlg(oDlg)


class MyCombo inherit TComboBox
    METHOD DrawItem( nIdCtl, nPStruct )
endclass

#define WHITE_BRUSH   0
#define COLOR_HIGHLIGHT      13
#define COLOR_HIGHLIGHTTEXT  14
#define COLOR_WINDOW          5
#define COLOR_WINDOWTEXT      6

METHOD DrawItem( nIdCtl, nPStruct ) CLASS MyCombo
    LOCAL aData := GetDrawItemStruct(nPStruct)
    LOCAL hDC := aData[7], aRect := {aData[8],aData[9],aData[10],aData[11]}
    LOCAL cFont, oFont
    if aData[3]>=0
        cFont := ::aItems[aData[3]+1]
    endif
    FillRect(hDC,aRect, GetStockObject( WHITE_BRUSH ) )
    if hb_bitAnd(aData[5],1)>0
        SetTextColor(hDC, GetSysColor(COLOR_HIGHLIGHTTEXT))
        SetBkColor(hDC, GetSysColor(COLOR_HIGHLIGHT))
    else
        SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT))
        SetBkColor(hDC, GetSysColor(COLOR_WINDOW))
    endif
    if !empty(cFont)
        DEFINE Font oFont NAME cFont SIZE nil,aData[10]-aData[8]
        oFont:Activate(hDC)
        //DrawTextEx(hDC,cFont,aRect,1)
        //SetTextAlign(hDC, 6)
        //ExtTextOut(hDC, aData[8], (aData[9]+aData[11])/2, aRect, cFont, 6)
        ExtTextOut(hDC, aData[8], aData[9]+3, aRect, cFont,2)
        oFont:End()
    endif
    if hb_bitAnd(aData[5],1)>0
        DrawFocusRect(hDC,aData[8],aData[9],aData[10],aData[11])
        SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT))
        SetBkColor(hDC, GetSysColor(COLOR_WINDOW))
    endif
    //MsgInfo("Called")
return 1

[nageswaragunupudi]

Thanks for the suggestion.

There already exists bDrawItem. Now a new data bOwnerDraw is provided for this purpose in the new version.

This sample is an adaptation of the proposed code posted above.

Code: Select all  Expand view

#include "fivewin.ch"

#define WHITE_BRUSH           0
#define COLOR_HIGHLIGHT      13
#define COLOR_HIGHLIGHTTEXT  14
#define COLOR_WINDOW          5
#define COLOR_WINDOWTEXT      6

//----------------------------------------------------------------------------//

function Main()

   local oWnd, oCbx, aItems, cItem, oFont

   DEFINE FONT oFont NAME "TAHOMA" SIZE 0,-24
   DEFINE WINDOW oWnd
   oWnd:SetFont( oFont )

   aItems   := GetFontNames( oWnd:GetDC() )
   oWnd:ReleaseDC()
   cItem    := aItems[ 1 ]

   @ 40,40 COMBOBOX oCbx VAR cItem ITEMS aItems SIZE 300,400 PIXEL OF oWnd ;
      OWNERDRAW OwnerDrawItem( Self, nIdCtl, oItemStruct )

   ACTIVATE WINDOW oWnd CENTERED
   RELEASE FONT oFont

return nil

//----------------------------------------------------------------------------//

function OwnerDrawItem( Self, nIdCtl, oItem )

   local cFont, oFont
   local hDC      := oItem:hDC

    if oItem:itemID >= 0
        cFont := oItem:itemData
    endif

    FillRect( hDC, oItem:aRect, GetStockObject( WHITE_BRUSH ) )

    if lAnd( oItem:itemState, 1 )
        SetTextColor( hDC, GetSysColor( COLOR_HIGHLIGHTTEXT ) )
        SetBkColor(   hDC, GetSysColor( COLOR_HIGHLIGHT ) )
    else
        SetTextColor( hDC, GetSysColor( COLOR_WINDOWTEXT ) )
        SetBkColor(   hDC, GetSysColor( COLOR_WINDOW ) )
    endif

    if !Empty( cFont )
        DEFINE Font oFont NAME cFont SIZE nil, oItem:nHeight
        oFont:Activate( hDC )
        ExtTextOut( hDC, oItem:nTop, oItem:nLeft + 3, oItem:aRect, cFont, 2 )
        oFont:End()
    endif

    if lAnd( oItem:itemState, 1 )
        DrawFocusRect( hDC, oItem:nTop, oItem:nLeft, oItem:nBottom, oItem:nRight )
        SetTextColor(  hDC, GetSysColor( COLOR_WINDOWTEXT ) )
        SetBkColor(    hDC, GetSysColor( COLOR_WINDOW ) )
    endif

return 1

//----------------------------------------------------------------------------//
 

[AntoninoP]

I like it very much!