wxDeleteStockLists() used (instead of duplicating part of it's code)

[wxWidgets.git] / src / msw / listctrl.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        listctrl.cpp
// Purpose:     wxListCtrl
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:   	wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "listctrl.h"
#endif

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx.h"
#endif

#if defined(__WIN95__)

#include "wx/listctrl.h"

#include "wx/msw/private.h"

#ifndef __GNUWIN32__
#include <commctrl.h>
#endif

#ifdef __GNUWIN32__
#include "wx/msw/gnuwin32/extra.h"
#endif

static void wxConvertToMSWListItem(const wxListCtrl *ctrl, wxListItem& info, LV_ITEM& tvItem);
static void wxConvertFromMSWListItem(const wxListCtrl *ctrl, wxListItem& info, LV_ITEM& tvItem, HWND getFullInfo = 0);

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxListCtrl, wxControl)
IMPLEMENT_DYNAMIC_CLASS(wxListItem, wxObject)

#endif

wxListCtrl::wxListCtrl(void)
{
	m_imageListNormal = NULL;
	m_imageListSmall = NULL;
	m_imageListState = NULL;
	m_baseStyle = 0;
    m_colCount = 0;
    m_textCtrl = NULL;
}

bool wxListCtrl::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size,
            long style, const wxValidator& validator, const wxString& name)
{
  m_imageListNormal = NULL;
  m_imageListSmall = NULL;
  m_imageListState = NULL;
  m_textCtrl = NULL;
  m_colCount = 0;

  wxSystemSettings settings;
  SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
  SetForegroundColour(parent->GetDefaultForegroundColour());

  SetValidator(validator);
  SetName(name);

  int x = pos.x;
  int y = pos.y;
  int width = size.x;
  int height = size.y;

  m_windowStyle = style;

  SetParent(parent);

  if (width <= 0)
    width = 100;
  if (height <= 0)
    height = 30;
  if (x < 0)
    x = 0;
  if (y < 0)
    y = 0;

  m_windowId = (id == -1) ? NewControlId() : id;

  DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP;
  
  bool want3D;
  WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;

  // Even with extended styles, need to combine with WS_BORDER
  // for them to look right.
  if (want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER) ||
       (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
    wstyle |= WS_BORDER;

  wstyle |= LVS_SHAREIMAGELISTS;
  m_baseStyle = wstyle;

  long oldStyle = 0; // Dummy
  wstyle |= ConvertToMSWStyle(oldStyle, m_windowStyle);

  // Create the ListView control.
  HWND hWndListControl = CreateWindowEx(exStyle,
    WC_LISTVIEW,
    "",
    wstyle,
    x, y, width, height,
    (HWND) parent->GetHWND(),
    (HMENU)m_windowId,
    wxGetInstance(),
    NULL );

  m_hWnd = (WXHWND) hWndListControl;
  if (parent) parent->AddChild(this);
  
  SubclassWin((WXHWND) m_hWnd);

  return TRUE;
}

wxListCtrl::~wxListCtrl(void)
{
    if (m_textCtrl)
    {
      m_textCtrl->UnsubclassWin();
      m_textCtrl->SetHWND(0);
      delete m_textCtrl;
      m_textCtrl = NULL;
    }
}

// Add or remove a single window style
void wxListCtrl::SetSingleStyle(long style, bool add)
{
	long flag = GetWindowStyleFlag();

	// Get rid of conflicting styles
	if ( add )
	{
		if ( style & wxLC_MASK_TYPE)
			flag = flag & ~wxLC_MASK_TYPE ;
		if ( style & wxLC_MASK_ALIGN )
			flag = flag & ~wxLC_MASK_ALIGN ;
		if ( style & wxLC_MASK_SORT )
			flag = flag & ~wxLC_MASK_SORT ;
    }

	if ( flag & style )
	{
		if ( !add )
			flag -= style;
	}
	else
	{
		if ( add )
		{
			flag |= style;
		}
	}

	m_windowStyle = flag;

	RecreateWindow();
}

// Set the whole window style
void wxListCtrl::SetWindowStyleFlag(long flag)
{
	m_windowStyle = flag;

	RecreateWindow();
}

void wxListCtrl::RecreateWindow(void)
{
	if ( GetHWND() )
	{
	  long oldStyle = 0;
      long style = ConvertToMSWStyle(oldStyle, m_windowStyle);
	  style |= m_baseStyle;
//      ::SetWindowLong((HWND) GetHWND(), GWL_STYLE, style);

      // The following recreation of the window appears to be necessary
	  // because SetWindowLong doesn't seem to do it.

      int x, y, width, height;
      GetPosition(&x, &y);
      GetSize(&width, &height);

      UnsubclassWin();
      ::DestroyWindow((HWND) GetHWND());

      // Experimental
      // Recreate the ListView control: unfortunately I can't
	  // make it work by using SetWindowLong.
      bool want3D;
      WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
      HWND hWndListControl = CreateWindowEx(exStyle,
        WC_LISTVIEW,
        "",
        style,
        x, y, width, height,
        (HWND) GetParent()->GetHWND(),
        (HMENU)m_windowId,
        wxGetInstance(),
        NULL );

      m_hWnd = (WXHWND) hWndListControl;
      SubclassWin((WXHWND) m_hWnd);

      if ( m_imageListNormal )
	    SetImageList(m_imageListNormal, wxIMAGE_LIST_NORMAL);
      if ( m_imageListSmall )
	    SetImageList(m_imageListSmall, wxIMAGE_LIST_SMALL);
      if ( m_imageListState )
	    SetImageList(m_imageListState, wxIMAGE_LIST_STATE);
	}
}

// Can be just a single style, or a bitlist
long wxListCtrl::ConvertToMSWStyle(long& oldStyle, long style) const
{
  long wstyle = 0;
  if ( style & wxLC_ICON )
  {
	if ( (oldStyle & LVS_TYPEMASK) == LVS_SMALLICON )
		oldStyle -= LVS_SMALLICON;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_REPORT )
		oldStyle -= LVS_REPORT;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_LIST )
		oldStyle -= LVS_LIST;
	wstyle |= LVS_ICON;
  }

  if ( style & wxLC_SMALL_ICON )
  {
	if ( (oldStyle & LVS_TYPEMASK) == LVS_ICON )
		oldStyle -= LVS_ICON;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_REPORT )
		oldStyle -= LVS_REPORT;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_LIST )
		oldStyle -= LVS_LIST;
	wstyle |= LVS_SMALLICON;
  }

  if ( style & wxLC_LIST )
  {
	if ( (oldStyle & LVS_TYPEMASK) == LVS_ICON )
		oldStyle -= LVS_ICON;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_REPORT )
		oldStyle -= LVS_REPORT;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_SMALLICON )
		oldStyle -= LVS_SMALLICON;
	wstyle |= LVS_LIST;
  }

  if ( style & wxLC_REPORT )
  {
	if ( (oldStyle & LVS_TYPEMASK) == LVS_ICON )
		oldStyle -= LVS_ICON;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_LIST )
		oldStyle -= LVS_LIST;
	if ( (oldStyle & LVS_TYPEMASK) == LVS_SMALLICON )
		oldStyle -= LVS_SMALLICON;
	wstyle |= LVS_REPORT;
  }

  if ( style & wxLC_ALIGN_LEFT )
  {
	if ( oldStyle & LVS_ALIGNTOP )
		oldStyle -= LVS_ALIGNTOP;
	wstyle |= LVS_ALIGNLEFT;
  }

  if ( style & wxLC_ALIGN_TOP )
  {
	if ( oldStyle & LVS_ALIGNLEFT )
		oldStyle -= LVS_ALIGNLEFT;
	wstyle |= LVS_ALIGNTOP;
  }

  if ( style & wxLC_AUTOARRANGE )
	wstyle |= LVS_AUTOARRANGE;

  // Apparently, no such style (documentation wrong?)
/*
  if ( style & wxLC_BUTTON )
	wstyle |= LVS_BUTTON;
*/

  if ( style & wxLC_NO_SORT_HEADER )
	wstyle |= LVS_NOSORTHEADER;

  if ( style & wxLC_NO_HEADER )
	wstyle |= LVS_NOCOLUMNHEADER;

  if ( style & wxLC_EDIT_LABELS )
	wstyle |= LVS_EDITLABELS;

  if ( style & wxLC_SINGLE_SEL )
	wstyle |= LVS_SINGLESEL;

  if ( style & wxLC_SORT_ASCENDING )
  {
	if ( oldStyle & LVS_SORTDESCENDING )
		oldStyle -= LVS_SORTDESCENDING;
	wstyle |= LVS_SORTASCENDING;
  }

  if ( style & wxLC_SORT_DESCENDING )
  {
	if ( oldStyle & LVS_SORTASCENDING )
		oldStyle -= LVS_SORTASCENDING;
	wstyle |= LVS_SORTDESCENDING;
  }

  return wstyle;
}

// Sets the background colour (GetBackgroundColour already implicit in
// wxWindow class)
void wxListCtrl::SetBackgroundColour(const wxColour& col)
{
	wxWindow::SetBackgroundColour(col);

	ListView_SetBkColor((HWND) GetHWND(), PALETTERGB(col.Red(), col.Green(), col.Blue()));
}

// Gets information about this column
bool wxListCtrl::GetColumn(int col, wxListItem& item) const
{
	LV_COLUMN lvCol;
	lvCol.mask = 0;
	lvCol.fmt = 0;
	lvCol.pszText = NULL;

   	if ( item.m_mask & wxLIST_MASK_TEXT )
	{
		lvCol.mask |= LVCF_TEXT;
		lvCol.pszText = new char[513];
		lvCol.cchTextMax = 512;
	}

	bool success = (ListView_GetColumn((HWND) GetHWND(), col, & lvCol) != 0);

//	item.m_subItem = lvCol.iSubItem;
	item.m_width = lvCol.cx;

   	if ( (item.m_mask & wxLIST_MASK_TEXT) && lvCol.pszText )
	{
		item.m_text = lvCol.pszText;
		delete[] lvCol.pszText;
	}

	if ( item.m_mask & wxLIST_MASK_FORMAT )
	{
		if (lvCol.fmt == LVCFMT_LEFT)
			item.m_format = wxLIST_FORMAT_LEFT;
		else if (lvCol.fmt == LVCFMT_RIGHT)
			item.m_format = wxLIST_FORMAT_RIGHT;
		else if (lvCol.fmt == LVCFMT_CENTER)
			item.m_format = wxLIST_FORMAT_CENTRE;
    }

	return success;
}

// Sets information about this column
bool wxListCtrl::SetColumn(int col, wxListItem& item)
{
	LV_COLUMN lvCol;
	lvCol.mask = 0;
	lvCol.fmt = 0;
	lvCol.pszText = NULL;

   	if ( item.m_mask & wxLIST_MASK_TEXT )
	{
		lvCol.mask |= LVCF_TEXT;
		lvCol.pszText = WXSTRINGCAST item.m_text;
		lvCol.cchTextMax = 0; // Ignored
	}
	if ( item.m_mask & wxLIST_MASK_FORMAT )
	{
		lvCol.mask |= LVCF_FMT;

		if ( item.m_format == wxLIST_FORMAT_LEFT )
			lvCol.fmt = LVCFMT_LEFT;
		if ( item.m_format == wxLIST_FORMAT_RIGHT )
			lvCol.fmt = LVCFMT_RIGHT;
		if ( item.m_format == wxLIST_FORMAT_CENTRE )
			lvCol.fmt = LVCFMT_CENTER;
    }

   	if ( item.m_mask & wxLIST_MASK_WIDTH )
	{
		lvCol.mask |= LVCF_WIDTH;
		lvCol.cx = item.m_width;

		if ( lvCol.cx == wxLIST_AUTOSIZE)
			lvCol.cx = LVSCW_AUTOSIZE;
		else if ( lvCol.cx == wxLIST_AUTOSIZE_USEHEADER)
			lvCol.cx = LVSCW_AUTOSIZE_USEHEADER;
	}
	lvCol.mask |= LVCF_SUBITEM;
	lvCol.iSubItem = col;
	return (ListView_SetColumn((HWND) GetHWND(), col, & lvCol) != 0);
}

// Gets the column width
int wxListCtrl::GetColumnWidth(int col) const
{
	return ListView_GetColumnWidth((HWND) GetHWND(), col);
}

// Sets the column width
bool wxListCtrl::SetColumnWidth(int col, int width)
{
	int col2 = col;
	if ( m_windowStyle & wxLC_LIST )
		col2 = -1;

	int width2 = width;
	if ( width2 == wxLIST_AUTOSIZE)
		width2 = LVSCW_AUTOSIZE;
	else if ( width2 == wxLIST_AUTOSIZE_USEHEADER)
		width2 = LVSCW_AUTOSIZE_USEHEADER;

	return (ListView_SetColumnWidth((HWND) GetHWND(), col2, width2) != 0);
}

// Gets the number of items that can fit vertically in the
// visible area of the list control (list or report view)
// or the total number of items in the list control (icon
// or small icon view)
int wxListCtrl::GetCountPerPage(void) const
{
	return ListView_GetCountPerPage((HWND) GetHWND());
}

// Gets the edit control for editing labels.
wxTextCtrl* wxListCtrl::GetEditControl(void) const
{
    return m_textCtrl;
}

// Gets information about the item
bool wxListCtrl::GetItem(wxListItem& info) const
{
	LV_ITEM lvItem;
	lvItem.pszText = NULL;
	if ( info.m_mask & wxLIST_MASK_TEXT )
	{
		lvItem.pszText = new char[513];
		lvItem.cchTextMax = 512;
	}
	bool success = (::SendMessage((HWND) GetHWND(), LVM_GETITEM, 0, (LPARAM)& lvItem) != 0);

	if ( !success )
	{
        if (lvItem.pszText)
			delete[] lvItem.pszText;

		return FALSE;
	}

    wxConvertFromMSWListItem(this, info, lvItem);

    if (lvItem.pszText)
		delete[] lvItem.pszText;

	return success;
}

// Sets information about the item
bool wxListCtrl::SetItem(wxListItem& info)
{
	LV_ITEM item;
    wxConvertToMSWListItem(this, info, item);
	item.cchTextMax = 0;
	return (ListView_SetItem((HWND) GetHWND(), &item) != 0);
}

long wxListCtrl::SetItem(long index, int col, const wxString& label, int imageId)
{
	wxListItem info;
	info.m_text = label;
	info.m_mask = wxLIST_MASK_TEXT;
	info.m_itemId = index;
	info.m_col = col;
	if ( imageId > -1 )
	{
		info.m_image = imageId;
		info.m_mask |= wxLIST_MASK_IMAGE;
	}
	return SetItem(info);
}


// Gets the item state
int wxListCtrl::GetItemState(long item, long stateMask) const
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_STATE ;
	info.m_stateMask = stateMask;
	info.m_itemId = item;

	if (!GetItem(info))
		return 0;

	return info.m_state;
}

// Sets the item state
bool wxListCtrl::SetItemState(long item, long state, long stateMask)
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_STATE ;
	info.m_state = state;
	info.m_stateMask = stateMask;
	info.m_itemId = item;

	return SetItem(info);
}

// Sets the item image
bool wxListCtrl::SetItemImage(long item, int image, int selImage)
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_IMAGE ;
	info.m_image = image;
	info.m_itemId = item;

	return SetItem(info);
}

// Gets the item text
wxString wxListCtrl::GetItemText(long item) const
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_TEXT ;
	info.m_itemId = item;

	if (!GetItem(info))
		return wxString("");
	return info.m_text;
}

// Sets the item text
void wxListCtrl::SetItemText(long item, const wxString& str)
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_TEXT ;
	info.m_itemId = item;
	info.m_text = str;

	SetItem(info);
}

// Gets the item data
long wxListCtrl::GetItemData(long item) const
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_DATA ;
	info.m_itemId = item;

	if (!GetItem(info))
		return 0;
	return info.m_data;
}

// Sets the item data
bool wxListCtrl::SetItemData(long item, long data)
{
	wxListItem info;

	info.m_mask = wxLIST_MASK_DATA ;
	info.m_itemId = item;
	info.m_data = data;

	return SetItem(info);
}

// Gets the item rectangle
bool wxListCtrl::GetItemRect(long item, wxRectangle& rect, int code) const
{
	RECT rect2;

	int code2 = LVIR_BOUNDS;
	if ( code == wxLIST_RECT_BOUNDS )
		code2 = LVIR_BOUNDS;
	else if ( code == wxLIST_RECT_ICON )
		code2 = LVIR_ICON;
	else if ( code == wxLIST_RECT_LABEL )
		code2 = LVIR_LABEL;

	bool success = (ListView_GetItemRect((HWND) GetHWND(), (int) item, &rect2, code2) != 0);

	rect.x = rect2.left;
	rect.y = rect2.top;
	rect.width = rect2.right - rect2.left;
	rect.height = rect2.bottom - rect2.left;
	return success;
}

// Gets the item position
bool wxListCtrl::GetItemPosition(long item, wxPoint& pos) const
{
	POINT pt;

	bool success = (ListView_GetItemPosition((HWND) GetHWND(), (int) item, &pt) != 0);

	pos.x = pt.x; pos.y = pt.y;
	return success;
}

// Sets the item position.
bool wxListCtrl::SetItemPosition(long item, const wxPoint& pos)
{
	return (ListView_SetItemPosition((HWND) GetHWND(), (int) item, pos.x, pos.y) != 0);
}

// Gets the number of items in the list control
int wxListCtrl::GetItemCount(void) const
{
	return ListView_GetItemCount((HWND) GetHWND());
}

// Retrieves the spacing between icons in pixels.
// If small is TRUE, gets the spacing for the small icon
// view, otherwise the large icon view.
int wxListCtrl::GetItemSpacing(bool isSmall) const
{
	return ListView_GetItemSpacing((HWND) GetHWND(), (BOOL) isSmall);
}

// Gets the number of selected items in the list control
int wxListCtrl::GetSelectedItemCount(void) const
{
	return ListView_GetSelectedCount((HWND) GetHWND());
}

// Gets the text colour of the listview
wxColour wxListCtrl::GetTextColour(void) const
{
	COLORREF ref = ListView_GetTextColor((HWND) GetHWND());
	wxColour col(GetRValue(ref), GetGValue(ref), GetBValue(ref));
	return col;
}

// Sets the text colour of the listview
void wxListCtrl::SetTextColour(const wxColour& col)
{
	ListView_SetTextColor((HWND) GetHWND(), PALETTERGB(col.Red(), col.Blue(), col.Green()));
}

// Gets the index of the topmost visible item when in
// list or report view
long wxListCtrl::GetTopItem(void) const
{
	return (long) ListView_GetTopIndex((HWND) GetHWND());
}

// Searches for an item, starting from 'item'.
// 'geometry' is one of
// wxLIST_NEXT_ABOVE/ALL/BELOW/LEFT/RIGHT.
// 'state' is a state bit flag, one or more of
// wxLIST_STATE_DROPHILITED/FOCUSED/SELECTED/CUT.
// item can be -1 to find the first item that matches the
// specified flags.
// Returns the item or -1 if unsuccessful.
long wxListCtrl::GetNextItem(long item, int geom, int state) const
{
	long flags = 0;

	if ( geom == wxLIST_NEXT_ABOVE )
		flags |= LVNI_ABOVE;
	if ( geom == wxLIST_NEXT_ALL )
		flags |= LVNI_ALL;
	if ( geom == wxLIST_NEXT_BELOW )
		flags |= LVNI_BELOW;
	if ( geom == wxLIST_NEXT_LEFT )
		flags |= LVNI_TOLEFT;
	if ( geom == wxLIST_NEXT_RIGHT )
		flags |= LVNI_TORIGHT;

	if ( state & wxLIST_STATE_CUT )
		flags |= LVNI_CUT;
	if ( state & wxLIST_STATE_DROPHILITED )
		flags |= LVNI_DROPHILITED;
	if ( state & wxLIST_STATE_FOCUSED )
		flags |= LVNI_FOCUSED;
	if ( state & wxLIST_STATE_SELECTED )
		flags |= LVNI_SELECTED;

	return (long) ListView_GetNextItem((HWND) GetHWND(), item, flags);
}


wxImageList *wxListCtrl::GetImageList(int which) const
{
	if ( which == wxIMAGE_LIST_NORMAL )
    {
		return m_imageListNormal;
	}
	else if ( which == wxIMAGE_LIST_SMALL )
    {
		return m_imageListSmall;
	}
	else if ( which == wxIMAGE_LIST_STATE )
    {
		return m_imageListState;
	}
	return NULL;
}

void wxListCtrl::SetImageList(wxImageList *imageList, int which)
{
	int flags = 0;
	if ( which == wxIMAGE_LIST_NORMAL )
    {
		flags = LVSIL_NORMAL;
		m_imageListNormal = imageList;
	}
	else if ( which == wxIMAGE_LIST_SMALL )
    {
		flags = LVSIL_SMALL;
		m_imageListSmall = imageList;
	}
	else if ( which == wxIMAGE_LIST_STATE )
    {
		flags = LVSIL_STATE;
		m_imageListState = imageList;
	}
	ListView_SetImageList((HWND) GetHWND(), (HIMAGELIST) imageList ? imageList->GetHIMAGELIST() : 0, flags);
}

// Operations
////////////////////////////////////////////////////////////////////////////

// Arranges the items
bool wxListCtrl::Arrange(int flag)
{
	UINT code = 0;
	if ( flag == wxLIST_ALIGN_LEFT )
		code = LVA_ALIGNLEFT;
	else if ( flag == wxLIST_ALIGN_TOP )
		code = LVA_ALIGNTOP;
	else if ( flag == wxLIST_ALIGN_DEFAULT )
		code = LVA_DEFAULT;
	else if ( flag == wxLIST_ALIGN_SNAP_TO_GRID )
		code = LVA_SNAPTOGRID;

	return (ListView_Arrange((HWND) GetHWND(), code) != 0);
}

// Deletes an item
bool wxListCtrl::DeleteItem(long item)
{
	return (ListView_DeleteItem((HWND) GetHWND(), (int) item) != 0);
}

// Deletes all items
bool wxListCtrl::DeleteAllItems(void)
{
	return (ListView_DeleteAllItems((HWND) GetHWND()) != 0);
}

// Deletes all items
bool wxListCtrl::DeleteAllColumns(void)
{
	int i;
    for ( i = 0; i < m_colCount; i++)
    {
	  if (ListView_DeleteColumn((HWND) GetHWND(), 0) != 0)
        m_colCount --;
    }
    return (m_colCount == 0);
}

// Deletes a column
bool wxListCtrl::DeleteColumn(int col)
{
	bool success = (ListView_DeleteColumn((HWND) GetHWND(), col) != 0);

    if ( success && (m_colCount > 0) )
        m_colCount --;
    return success;
}

// Clears items, and columns if there are any.
void wxListCtrl::ClearAll(void)
{
    DeleteAllItems();
    if ( m_colCount > 0 )
        DeleteAllColumns();
}

wxTextCtrl* wxListCtrl::EditLabel(long item, wxClassInfo* textControlClass)
{
    wxASSERT( (textControlClass->IsKindOf(CLASSINFO(wxTextCtrl))) );

    HWND hWnd = (HWND) ListView_EditLabel((HWND) GetHWND(), item);

    if (m_textCtrl)
    {
      m_textCtrl->UnsubclassWin();
      m_textCtrl->SetHWND(0);
      delete m_textCtrl;
      m_textCtrl = NULL;
    }

    m_textCtrl = (wxTextCtrl*) textControlClass->CreateObject();
    m_textCtrl->SetHWND((WXHWND) hWnd);
    m_textCtrl->SubclassWin((WXHWND) hWnd);

    return m_textCtrl;
}

// End label editing, optionally cancelling the edit
bool wxListCtrl::EndEditLabel(bool cancel)
{
    wxASSERT( FALSE);

/* I don't know how to implement this: there's no such macro as ListView_EndEditLabelNow.
 * ???
    bool success = (ListView_EndEditLabelNow((HWND) GetHWND(), cancel) != 0);

    if (m_textCtrl)
    {
      m_textCtrl->UnsubclassWin();
      m_textCtrl->SetHWND(0);
      delete m_textCtrl;
      m_textCtrl = NULL;
    }
    return success;
*/
  return FALSE;
}


// Ensures this item is visible
bool wxListCtrl::EnsureVisible(long item)
{
	return (ListView_EnsureVisible((HWND) GetHWND(), (int) item, FALSE) != 0);
}

// Find an item whose label matches this string, starting from the item after 'start'
// or the beginning if 'start' is -1.
long wxListCtrl::FindItem(long start, const wxString& str, bool partial)
{
	LV_FINDINFO findInfo;

	findInfo.flags = LVFI_STRING;
	if ( partial )
		findInfo.flags |= LVFI_STRING;
	findInfo.psz = WXSTRINGCAST str;

	return ListView_FindItem((HWND) GetHWND(), (int) start, & findInfo);
}

// Find an item whose data matches this data, starting from the item after 'start'
// or the beginning if 'start' is -1.
long wxListCtrl::FindItem(long start, long data)
{
	LV_FINDINFO findInfo;

	findInfo.flags = LVFI_PARAM;
	findInfo.lParam = data;

	return ListView_FindItem((HWND) GetHWND(), (int) start, & findInfo);
}

// Find an item nearest this position in the specified direction, starting from
// the item after 'start' or the beginning if 'start' is -1.
long wxListCtrl::FindItem(long start, const wxPoint& pt, int direction)
{
	LV_FINDINFO findInfo;

	findInfo.flags = LVFI_NEARESTXY;
	findInfo.pt.x = pt.x;
	findInfo.pt.y = pt.y;
	findInfo.vkDirection = VK_RIGHT;

	if ( direction == wxLIST_FIND_UP )
		findInfo.vkDirection = VK_UP;
	else if ( direction == wxLIST_FIND_DOWN )
		findInfo.vkDirection = VK_DOWN;
	else if ( direction == wxLIST_FIND_LEFT )
		findInfo.vkDirection = VK_LEFT;
	else if ( direction == wxLIST_FIND_RIGHT )
		findInfo.vkDirection = VK_RIGHT;

	return ListView_FindItem((HWND) GetHWND(), (int) start, & findInfo);
}

// Determines which item (if any) is at the specified point,
// giving details in 'flags' (see wxLIST_HITTEST_... flags above)
long wxListCtrl::HitTest(const wxPoint& point, int& flags)
{
    LV_HITTESTINFO hitTestInfo;
	hitTestInfo.pt.x = (int) point.x;
	hitTestInfo.pt.y = (int) point.y;

    ListView_HitTest((HWND) GetHWND(), & hitTestInfo);

	flags = 0;
	if ( hitTestInfo.flags & LVHT_ABOVE )
		flags |= wxLIST_HITTEST_ABOVE;
	if ( hitTestInfo.flags & LVHT_BELOW )
		flags |= wxLIST_HITTEST_BELOW;
	if ( hitTestInfo.flags & LVHT_NOWHERE )
		flags |= wxLIST_HITTEST_NOWHERE;
	if ( hitTestInfo.flags & LVHT_ONITEMICON )
		flags |= wxLIST_HITTEST_ONITEMICON;
	if ( hitTestInfo.flags & LVHT_ONITEMLABEL )
		flags |= wxLIST_HITTEST_ONITEMLABEL;
	if ( hitTestInfo.flags & LVHT_ONITEMSTATEICON )
		flags |= wxLIST_HITTEST_ONITEMSTATEICON;
	if ( hitTestInfo.flags & LVHT_TOLEFT )
		flags |= wxLIST_HITTEST_TOLEFT;
	if ( hitTestInfo.flags & LVHT_TORIGHT )
		flags |= wxLIST_HITTEST_TORIGHT;

	return (long) hitTestInfo.iItem ;
}

// Inserts an item, returning the index of the new item if successful,
// -1 otherwise.
long wxListCtrl::InsertItem(wxListItem& info)
{
	LV_ITEM item;
	wxConvertToMSWListItem(this, info, item);

	return (long) ListView_InsertItem((HWND) GetHWND(), & item);
}

long wxListCtrl::InsertItem(long index, const wxString& label)
{
	wxListItem info;
	info.m_text = label;
	info.m_mask = wxLIST_MASK_TEXT;
	info.m_itemId = index;
	return InsertItem(info);
}

// Inserts an image item
long wxListCtrl::InsertItem(long index, int imageIndex)
{
	wxListItem info;
	info.m_image = imageIndex;
	info.m_mask = wxLIST_MASK_IMAGE;
	info.m_itemId = index;
	return InsertItem(info);
}

// Inserts an image/string item
long wxListCtrl::InsertItem(long index, const wxString& label, int imageIndex)
{
	wxListItem info;
	info.m_image = imageIndex;
	info.m_text = label;
	info.m_mask = wxLIST_MASK_IMAGE | wxLIST_MASK_TEXT;
	info.m_itemId = index;
	return InsertItem(info);
}

// For list view mode (only), inserts a column.
long wxListCtrl::InsertColumn(long col, wxListItem& item)
{
	LV_COLUMN lvCol;
	lvCol.mask = 0;
	lvCol.fmt = 0;
	lvCol.pszText = NULL;

   	if ( item.m_mask & wxLIST_MASK_TEXT )
	{
		lvCol.mask |= LVCF_TEXT;
		lvCol.pszText = WXSTRINGCAST item.m_text;
		lvCol.cchTextMax = 0; // Ignored
	}
	if ( item.m_mask & wxLIST_MASK_FORMAT )
	{
		lvCol.mask |= LVCF_FMT;

		if ( item.m_format == wxLIST_FORMAT_LEFT )
			lvCol.fmt = LVCFMT_LEFT;
		if ( item.m_format == wxLIST_FORMAT_RIGHT )
			lvCol.fmt = LVCFMT_RIGHT;
		if ( item.m_format == wxLIST_FORMAT_CENTRE )
			lvCol.fmt = LVCFMT_CENTER;
    }

   	if ( item.m_mask & wxLIST_MASK_WIDTH )
	{
		lvCol.mask |= LVCF_WIDTH;
		lvCol.cx = item.m_width;

		if ( lvCol.cx == wxLIST_AUTOSIZE)
			lvCol.cx = LVSCW_AUTOSIZE;
		else if ( lvCol.cx == wxLIST_AUTOSIZE_USEHEADER)
			lvCol.cx = LVSCW_AUTOSIZE_USEHEADER;
	}
	lvCol.mask |= LVCF_SUBITEM;
	lvCol.iSubItem = col;

	bool success = (ListView_InsertColumn((HWND) GetHWND(), col, & lvCol) != 0);
    if ( success )
        m_colCount ++;
    return success;
}

long wxListCtrl::InsertColumn(long col, const wxString& heading, int format,
    int width)
{
	wxListItem item;
	item.m_mask = wxLIST_MASK_TEXT | wxLIST_MASK_FORMAT;
	item.m_text = heading;
	if ( width > -1 )
	{
		item.m_mask |= wxLIST_MASK_WIDTH;
		item.m_width = width;
	}
	item.m_format = format;

	return InsertColumn(col, item);
}

// Scrolls the list control. If in icon, small icon or report view mode,
// x specifies the number of pixels to scroll. If in list view mode, x
// specifies the number of columns to scroll.
// If in icon, small icon or list view mode, y specifies the number of pixels
// to scroll. If in report view mode, y specifies the number of lines to scroll.
bool wxListCtrl::ScrollList(int dx, int dy)
{
	return (ListView_Scroll((HWND) GetHWND(), dx, dy) != 0);
}

// Sort items.

// fn is a function which takes 3 long arguments: item1, item2, data.
// item1 is the long data associated with a first item (NOT the index).
// item2 is the long data associated with a second item (NOT the index).
// data is the same value as passed to SortItems.
// The return value is a negative number if the first item should precede the second
// item, a positive number of the second item should precede the first,
// or zero if the two items are equivalent.

// data is arbitrary data to be passed to the sort function.
bool wxListCtrl::SortItems(wxListCtrlCompare fn, long data)
{
	return (ListView_SortItems((HWND) GetHWND(), (PFNLVCOMPARE) fn, data) != 0);
}

bool wxListCtrl::MSWCommand(WXUINT cmd, WXWORD id)
{
  if (cmd == EN_UPDATE)
  {
    wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
    event.SetEventObject( this );
    ProcessCommand(event);
    return TRUE;
  }
  else if (cmd == EN_KILLFOCUS)
  {
    wxCommandEvent event(wxEVT_KILL_FOCUS, id);
    event.SetEventObject( this );
    ProcessCommand(event);
    return TRUE;
  }
  else return FALSE;
}

bool wxListCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
{
	wxListEvent event(wxEVT_NULL, m_windowId);
	wxEventType eventType = wxEVT_NULL;
	NMHDR *hdr1 = (NMHDR *) lParam;
	switch ( hdr1->code )
	{
		case LVN_BEGINDRAG:
		{
			eventType = wxEVT_COMMAND_LIST_BEGIN_DRAG;
			NM_LISTVIEW *hdr = (NM_LISTVIEW *)lParam;
			event.m_itemIndex = hdr->iItem;
			event.m_pointDrag.x = hdr->ptAction.x;
			event.m_pointDrag.y = hdr->ptAction.y;
			break;
		}
		case LVN_BEGINLABELEDIT:
		{
			eventType = wxEVT_COMMAND_LIST_BEGIN_LABEL_EDIT;
			LV_DISPINFO *info = (LV_DISPINFO *)lParam;
			wxConvertFromMSWListItem(this, event.m_item, info->item, (HWND) GetHWND());
			break;
		}
		case LVN_BEGINRDRAG:
		{
			eventType = wxEVT_COMMAND_LIST_BEGIN_RDRAG;
			NM_LISTVIEW* hdr = (NM_LISTVIEW*)lParam;
			event.m_itemIndex = hdr->iItem;
			event.m_pointDrag.x = hdr->ptAction.x;
			event.m_pointDrag.y = hdr->ptAction.y;
			break;
		}
		case LVN_COLUMNCLICK:
		{
			eventType = wxEVT_COMMAND_LIST_COL_CLICK;
			NM_LISTVIEW* hdr = (NM_LISTVIEW*)lParam;
			event.m_itemIndex = -1;
			event.m_col = hdr->iSubItem;
			break;
		}
		case LVN_DELETEALLITEMS:
		{
			eventType = wxEVT_COMMAND_LIST_DELETE_ALL_ITEMS;
//			NM_LISTVIEW* hdr = (NM_LISTVIEW*)lParam;
			event.m_itemIndex = -1;
			break;
		}
		case LVN_DELETEITEM:
		{
			eventType = wxEVT_COMMAND_LIST_DELETE_ITEM;
			NM_LISTVIEW* hdr = (NM_LISTVIEW*)lParam;
			event.m_itemIndex = hdr->iItem;
			break;
		}
		case LVN_ENDLABELEDIT:
		{
			eventType = wxEVT_COMMAND_LIST_END_LABEL_EDIT;
			LV_DISPINFO *info = (LV_DISPINFO *)lParam;
			wxConvertFromMSWListItem(this, event.m_item, info->item, (HWND) GetHWND());
			if ( info->item.pszText == NULL || info->item.iItem == -1 )
				event.m_cancelled = TRUE;
			break;
		}
		case LVN_GETDISPINFO:
		{
//			return FALSE;
			// TODO: some text buffering here, I think
			// TODO: API for getting Windows to retrieve values
			// on demand.
			eventType = wxEVT_COMMAND_LIST_GET_INFO;
			LV_DISPINFO *info = (LV_DISPINFO *)lParam;
			wxConvertFromMSWListItem(this, event.m_item, info->item, (HWND) GetHWND());
			break;
		}
		case LVN_INSERTITEM:
		{
			eventType = wxEVT_COMMAND_LIST_INSERT_ITEM;
			NM_LISTVIEW* hdr = (NM_LISTVIEW*)lParam;
			event.m_itemIndex = hdr->iItem;
			break;
		}
		case LVN_ITEMCHANGED:
		{
			// This needs to be sent to wxListCtrl as a rather more
			// concrete event. For now, just detect a selection
			// or deselection.
			NM_LISTVIEW* hdr = (NM_LISTVIEW*)lParam;
			if ( (hdr->uNewState & LVIS_SELECTED) && !(hdr->uOldState & LVIS_SELECTED) )
			{
			  eventType = wxEVT_COMMAND_LIST_ITEM_SELECTED;
			  event.m_itemIndex = hdr->iItem;
			}
			else if ( !(hdr->uNewState & LVIS_SELECTED) && (hdr->uOldState & LVIS_SELECTED) )
			{
			  eventType = wxEVT_COMMAND_LIST_ITEM_DESELECTED;
			  event.m_itemIndex = hdr->iItem;
			}
			else
				return FALSE;
			break;
		}
		case LVN_KEYDOWN:
		{
			eventType = wxEVT_COMMAND_LIST_KEY_DOWN;
			LV_KEYDOWN *info = (LV_KEYDOWN *)lParam;
			event.m_code = wxCharCodeMSWToWX(info->wVKey);
			break;
		}
		case LVN_SETDISPINFO:
		{
			eventType = wxEVT_COMMAND_LIST_SET_INFO;
			LV_DISPINFO *info = (LV_DISPINFO *)lParam;
			wxConvertFromMSWListItem(this, event.m_item, info->item, (HWND) GetHWND());
			break;
		}

		default :
			return wxControl::MSWNotify(wParam, lParam);
			break;
	}

	event.SetEventObject( this );
	event.SetEventType(eventType);

	if ( !GetEventHandler()->ProcessEvent(event) )
		return FALSE;

	if (hdr1->code == LVN_GETDISPINFO)
	{
		LV_DISPINFO *info = (LV_DISPINFO *)lParam;
		if ( info->item.mask & LVIF_TEXT )
		{
			if ( !event.m_item.m_text.IsNull() )
			{
			  info->item.pszText = AddPool(event.m_item.m_text);
			  info->item.cchTextMax = strlen(info->item.pszText) + 1;
			}
		}
//		wxConvertToMSWListItem(this, event.m_item, info->item);
	}

  	return TRUE;
}

char *wxListCtrl::AddPool(const wxString& str)
{
	// Remove the first element if 3 strings exist
	if ( m_stringPool.Number() == 3 )
	{
		wxNode *node = m_stringPool.First();
		delete[] (char *)node->Data();
		delete node;
	}
	wxNode *node = m_stringPool.Add((char *) (const char *)str);
	return (char *)node->Data();
}

// List item structure
wxListItem::wxListItem(void)
{
    m_mask = 0;
    m_itemId = 0;
    m_col = 0;
    m_state = 0;
    m_stateMask = 0;
    m_image = 0;
	m_data = 0;

	m_format = wxLIST_FORMAT_CENTRE;
	m_width = 0;
}

static void wxConvertFromMSWListItem(const wxListCtrl *ctrl, wxListItem& info, LV_ITEM& lvItem, HWND getFullInfo)
{
	info.m_data = lvItem.lParam;
	info.m_mask = 0;
	info.m_state = 0;
	info.m_stateMask = 0;
	info.m_itemId = lvItem.iItem;

	long oldMask = lvItem.mask;

	bool needText = FALSE;
	if (getFullInfo != 0)
	{
		if ( lvItem.mask & LVIF_TEXT )
			needText = FALSE;
		else
			needText = TRUE;

		if ( needText )
		{
			lvItem.pszText = new char[513];
			lvItem.cchTextMax = 512;
		}
//		lvItem.mask |= TVIF_HANDLE | TVIF_STATE | TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_CHILDREN | TVIF_PARAM ;
		lvItem.mask |= LVIF_TEXT | LVIF_IMAGE | LVIF_PARAM ;
		::SendMessage(getFullInfo, LVM_GETITEM, 0, (LPARAM)& lvItem) ;
	}

	if ( lvItem.mask & LVIF_STATE )
	{
		info.m_mask |= wxLIST_MASK_STATE;

    	if ( lvItem.stateMask & LVIS_CUT)
		{
			info.m_stateMask |= wxLIST_STATE_CUT ;
			if ( lvItem.state & LVIS_CUT )
				info.m_state |= wxLIST_STATE_CUT ;
		}
    	if ( lvItem.stateMask & LVIS_DROPHILITED)
		{
			info.m_stateMask |= wxLIST_STATE_DROPHILITED ;
			if ( lvItem.state & LVIS_DROPHILITED )
				info.m_state |= wxLIST_STATE_DROPHILITED ;
		}
    	if ( lvItem.stateMask & LVIS_FOCUSED)
		{
			info.m_stateMask |= wxLIST_STATE_FOCUSED ;
			if ( lvItem.state & LVIS_FOCUSED )
				info.m_state |= wxLIST_STATE_FOCUSED ;
		}
    	if ( lvItem.stateMask & LVIS_SELECTED)
		{
			info.m_stateMask |= wxLIST_STATE_SELECTED ;
			if ( lvItem.state & LVIS_SELECTED )
				info.m_state |= wxLIST_STATE_SELECTED ;
		}
	}

	if ( lvItem.mask & LVIF_TEXT )
	{
		info.m_mask |= wxLIST_MASK_TEXT;
		info.m_text = lvItem.pszText;
	}
	if ( lvItem.mask & LVIF_IMAGE )
	{
		info.m_mask |= wxLIST_MASK_IMAGE;
		info.m_image = lvItem.iImage;
	}
	if ( lvItem.mask & LVIF_PARAM )
		info.m_mask |= wxLIST_MASK_DATA;
	if ( lvItem.mask & LVIF_DI_SETITEM )
		info.m_mask |= wxLIST_SET_ITEM;
	info.m_col = lvItem.iSubItem;

	if (needText)
	{
       	if (lvItem.pszText)
			delete[] lvItem.pszText;
	}
	lvItem.mask = oldMask ;
}

static void wxConvertToMSWListItem(const wxListCtrl *ctrl, wxListItem& info, LV_ITEM& lvItem)
{
	lvItem.iItem = (int) info.m_itemId ;

	lvItem.iImage = info.m_image ;
	lvItem.lParam = info.m_data;
	lvItem.stateMask = 0;
	lvItem.state = 0;
	lvItem.mask = 0;
	lvItem.iSubItem = info.m_col;

	if (info.m_mask & wxLIST_MASK_STATE)
	{
		lvItem.mask |= LVIF_STATE ;
		if (info.m_stateMask & wxLIST_STATE_CUT)
		{
    		lvItem.stateMask |= LVIS_CUT ;
			if (info.m_state & wxLIST_STATE_CUT)
				lvItem.state |= LVIS_CUT;
		}
		if (info.m_stateMask & wxLIST_STATE_DROPHILITED)
		{
    		lvItem.stateMask |= LVIS_DROPHILITED;
			if (info.m_state & wxLIST_STATE_DROPHILITED)
    			lvItem.state |= LVIS_DROPHILITED;
		}
		if (info.m_stateMask & wxLIST_STATE_FOCUSED)
		{
    		lvItem.stateMask |= LVIS_FOCUSED;
			if (info.m_state & wxLIST_STATE_FOCUSED)
    			lvItem.state |= LVIS_FOCUSED;
		}
		if (info.m_stateMask & wxLIST_STATE_SELECTED)
		{
    		lvItem.stateMask |= LVIS_SELECTED;
			if (info.m_state & wxLIST_STATE_SELECTED)
    			lvItem.state |= LVIS_SELECTED;
		}
	}

	if (info.m_mask & wxLIST_MASK_TEXT)
	{
		lvItem.mask |= LVIF_TEXT ;
		if ( ctrl->GetWindowStyleFlag() & wxLC_USER_TEXT )
		{
			lvItem.pszText = LPSTR_TEXTCALLBACK;
		}
		else
		{
			lvItem.pszText = (char *) (const char *)info.m_text ;
			if ( lvItem.pszText )
				lvItem.cchTextMax = info.m_text.Length();
			else
				lvItem.cchTextMax = 0;
		}
	}
	if (info.m_mask & wxLIST_MASK_IMAGE)
		lvItem.mask |= LVIF_IMAGE ;
	if (info.m_mask & wxLIST_MASK_DATA)
		lvItem.mask |= LVIF_PARAM ;
}

// List event
IMPLEMENT_DYNAMIC_CLASS(wxListEvent, wxCommandEvent)

wxListEvent::wxListEvent(wxEventType commandType, int id):
  wxCommandEvent(commandType, id)
{
	m_code = 0;
	m_itemIndex = 0;
	m_col = 0;
	m_cancelled = FALSE;
}

#endif