listbox.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/listbox.cpp
// Purpose:     wxListBox
// Author:      Julian Smart
// Modified by: Vadim Zeitlin (owner drawn stuff)
// Created:
// RCS-ID:      $Id: listbox.cpp,v 1.123.2.1 2005/10/18 14:33:35 MW Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "listbox.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_LISTBOX

#ifndef WX_PRECOMP
#include "wx/listbox.h"
#include "wx/settings.h"
#include "wx/brush.h"
#include "wx/font.h"
#include "wx/dc.h"
#include "wx/utils.h"
#endif

#include "wx/window.h"
#include "wx/msw/private.h"

#include <windowsx.h>

#include "wx/dynarray.h"
#include "wx/log.h"

#if wxUSE_OWNER_DRAWN
    #include  "wx/ownerdrw.h"
#endif

#if wxUSE_EXTENDED_RTTI
WX_DEFINE_FLAGS( wxListBoxStyle )

wxBEGIN_FLAGS( wxListBoxStyle )
    // new style border flags, we put them first to
    // use them for streaming out
    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
    wxFLAGS_MEMBER(wxBORDER_RAISED)
    wxFLAGS_MEMBER(wxBORDER_STATIC)
    wxFLAGS_MEMBER(wxBORDER_NONE)

    // old style border flags
    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
    wxFLAGS_MEMBER(wxRAISED_BORDER)
    wxFLAGS_MEMBER(wxSTATIC_BORDER)
    wxFLAGS_MEMBER(wxBORDER)

    // standard window styles
    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
    wxFLAGS_MEMBER(wxWANTS_CHARS)
    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
    wxFLAGS_MEMBER(wxVSCROLL)
    wxFLAGS_MEMBER(wxHSCROLL)

    wxFLAGS_MEMBER(wxLB_SINGLE)
    wxFLAGS_MEMBER(wxLB_MULTIPLE)
    wxFLAGS_MEMBER(wxLB_EXTENDED)
    wxFLAGS_MEMBER(wxLB_HSCROLL)
    wxFLAGS_MEMBER(wxLB_ALWAYS_SB)
    wxFLAGS_MEMBER(wxLB_NEEDED_SB)
    wxFLAGS_MEMBER(wxLB_SORT)

wxEND_FLAGS( wxListBoxStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxListBox, wxControl,"wx/listbox.h")

wxBEGIN_PROPERTIES_TABLE(wxListBox)
    wxEVENT_PROPERTY( Select , wxEVT_COMMAND_LISTBOX_SELECTED , wxCommandEvent )
    wxEVENT_PROPERTY( DoubleClick , wxEVT_COMMAND_LISTBOX_DOUBLECLICKED , wxCommandEvent )

    wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
    wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
    wxPROPERTY_FLAGS( WindowStyle , wxListBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxListBox)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_4( wxListBox , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
#else
IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
#endif

/*
TODO PROPERTIES
    selection
    content
        item
*/

// ============================================================================
// list box item declaration and implementation
// ============================================================================

#if wxUSE_OWNER_DRAWN

class wxListBoxItem : public wxOwnerDrawn
{
public:
    wxListBoxItem(const wxString& str = wxEmptyString);
};

wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, false)
{
    // no bitmaps/checkmarks
    SetMarginWidth(0);
}

wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n))
{
    return new wxListBoxItem();
}

#endif  //USE_OWNER_DRAWN

// ============================================================================
// list box control implementation
// ============================================================================

// ----------------------------------------------------------------------------
// creation
// ----------------------------------------------------------------------------

// Listbox item
wxListBox::wxListBox()
{
    m_noItems = 0;
    m_selected = 0;
}

bool wxListBox::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,
                       const wxSize& size,
                       int n, const wxString choices[],
                       long style,
                       const wxValidator& validator,
                       const wxString& name)
{
    m_noItems = 0;
    m_selected = 0;

    // initialize base class fields
    if ( !CreateControl(parent, id, pos, size, style, validator, name) )
        return false;

    // create the native control
    if ( !MSWCreateControl(_T("LISTBOX"), wxEmptyString, pos, size) )
    {
        // control creation failed
        return false;
    }

    // initialize the contents
    for ( int i = 0; i < n; i++ )
    {
        Append(choices[i]);
    }

    // now we can compute our best size correctly, so do it if necessary
    SetBestSize(size);

    return true;
}

bool wxListBox::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,
                       const wxSize& size,
                       const wxArrayString& choices,
                       long style,
                       const wxValidator& validator,
                       const wxString& name)
{
    wxCArrayString chs(choices);
    return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
                  style, validator, name);
}

wxListBox::~wxListBox()
{
    Free();
}

WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
{
    WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);

    // always show the vertical scrollbar if necessary -- otherwise it is
    // impossible to use the control with the mouse
    msStyle |= WS_VSCROLL;

    // we always want to get the notifications
    msStyle |= LBS_NOTIFY;

    // without this style, you get unexpected heights, so e.g. constraint
    // layout doesn't work properly
    msStyle |= LBS_NOINTEGRALHEIGHT;

    wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED),
                  _T("only one of listbox selection modes can be specified") );

    if ( style & wxLB_MULTIPLE )
        msStyle |= LBS_MULTIPLESEL;
    else if ( style & wxLB_EXTENDED )
        msStyle |= LBS_EXTENDEDSEL;

    if ( m_windowStyle & wxLB_ALWAYS_SB )
        msStyle |= LBS_DISABLENOSCROLL;
    if ( m_windowStyle & wxLB_HSCROLL )
        msStyle |= WS_HSCROLL;
    if ( m_windowStyle & wxLB_SORT )
        msStyle |= LBS_SORT;

#if wxUSE_OWNER_DRAWN && !defined(__WXWINCE__)
    if ( m_windowStyle & wxLB_OWNERDRAW )
    {
        // we don't support LBS_OWNERDRAWVARIABLE yet and we also always put
        // the strings in the listbox for simplicity even though we could have
        // avoided it in this case
        msStyle |= LBS_OWNERDRAWFIXED | LBS_HASSTRINGS;
    }
#endif // wxUSE_OWNER_DRAWN

    return msStyle;
}

// ----------------------------------------------------------------------------
// implementation of wxListBoxBase methods
// ----------------------------------------------------------------------------

void wxListBox::DoSetFirstItem(int N)
{
    wxCHECK_RET( N >= 0 && N < m_noItems,
                 wxT("invalid index in wxListBox::SetFirstItem") );

    SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
}

void wxListBox::Delete(int N)
{
    wxCHECK_RET( N >= 0 && N < m_noItems,
                 wxT("invalid index in wxListBox::Delete") );

    // for owner drawn objects, the data is used for storing wxOwnerDrawn
    // pointers and we shouldn't touch it
#if !wxUSE_OWNER_DRAWN
    if ( !(m_windowStyle & wxLB_OWNERDRAW) )
#endif // !wxUSE_OWNER_DRAWN
        if ( HasClientObjectData() )
        {
            delete GetClientObject(N);
        }

    SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
    m_noItems--;

    SetHorizontalExtent(wxEmptyString);

    InvalidateBestSize();
}

int wxListBox::DoAppend(const wxString& item)
{
    int index = ListBox_AddString(GetHwnd(), item);
    m_noItems++;

#if wxUSE_OWNER_DRAWN
    if ( m_windowStyle & wxLB_OWNERDRAW ) {
        wxOwnerDrawn *pNewItem = CreateLboxItem(index); // dummy argument
        pNewItem->SetName(item);
        m_aItems.Insert(pNewItem, index);
        ListBox_SetItemData(GetHwnd(), index, pNewItem);
        pNewItem->SetFont(GetFont());
    }
#endif // wxUSE_OWNER_DRAWN

    SetHorizontalExtent(item);

    InvalidateBestSize();
    return index;
}

void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
{
    // avoid flicker - but don't need to do this for a hidden listbox
    bool hideAndShow = IsShown();
    if ( hideAndShow )
    {
        ShowWindow(GetHwnd(), SW_HIDE);
    }

    ListBox_ResetContent(GetHwnd());

    m_noItems = choices.GetCount();
    int i;
    for (i = 0; i < m_noItems; i++)
    {
        ListBox_AddString(GetHwnd(), choices[i]);
        if ( clientData )
        {
            SetClientData(i, clientData[i]);
        }
    }

#if wxUSE_OWNER_DRAWN
    if ( m_windowStyle & wxLB_OWNERDRAW ) {
        // first delete old items
        WX_CLEAR_ARRAY(m_aItems);

        // then create new ones
        for ( size_t ui = 0; ui < (size_t)m_noItems; ui++ ) {
            wxOwnerDrawn *pNewItem = CreateLboxItem(ui);
            pNewItem->SetName(choices[ui]);
            m_aItems.Add(pNewItem);
            ListBox_SetItemData(GetHwnd(), ui, pNewItem);
        }
    }
#endif // wxUSE_OWNER_DRAWN

    SetHorizontalExtent();

    if ( hideAndShow )
    {
        // show the listbox back if we hid it
        ShowWindow(GetHwnd(), SW_SHOW);
    }

    InvalidateBestSize();
}

int wxListBox::FindString(const wxString& s) const
{
    int pos = ListBox_FindStringExact(GetHwnd(), -1, s);
    if (pos == LB_ERR)
        return wxNOT_FOUND;
    else
        return pos;
}

void wxListBox::Clear()
{
    Free();

    ListBox_ResetContent(GetHwnd());

    m_noItems = 0;
    SetHorizontalExtent();

    InvalidateBestSize();
}

void wxListBox::Free()
{
#if wxUSE_OWNER_DRAWN
    if ( m_windowStyle & wxLB_OWNERDRAW )
    {
        WX_CLEAR_ARRAY(m_aItems);
    }
    else
#endif // wxUSE_OWNER_DRAWN
    if ( HasClientObjectData() )
    {
        for ( size_t n = 0; n < (size_t)m_noItems; n++ )
        {
            delete GetClientObject(n);
        }
    }
}

void wxListBox::DoSetSelection(int N, bool select)
{
    wxCHECK_RET( N == wxNOT_FOUND ||
                    (N >= 0 && N < m_noItems),
                 wxT("invalid index in wxListBox::SetSelection") );

    if ( HasMultipleSelection() )
    {
        SendMessage(GetHwnd(), LB_SETSEL, select, N);
    }
    else
    {
        SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
    }
}

bool wxListBox::IsSelected(int N) const
{
    wxCHECK_MSG( N >= 0 && N < m_noItems, false,
                 wxT("invalid index in wxListBox::Selected") );