void wxHeaderCtrl::DoUpdate(unsigned int idx)
{
// the native control does provide Header_SetItem() but it's inconvenient
// to use it because it sends HDN_ITEMCHANGING messages and we'd have to
// arrange not to block setting the width from there and the logic would be
// more complicated as we'd have to reset the old values as well as setting
// the new ones -- so instead just recreate the column
const wxHeaderColumn& col = GetColumn(idx);
if ( col.IsHidden() )
{
// column is hidden now
if ( !m_isHidden[idx] )
{
// but it wasn't hidden before, so remove it
if ( !Header_DeleteItem(GetHwnd(), MSWToNativeIdx(idx)) )
wxLogLastError(wxS("Header_DeleteItem()"));
m_isHidden[idx] = true;
}
//else: nothing to do, updating hidden column doesn't have any effect
}
else // column is shown now
{
if ( m_isHidden[idx] )
{
m_isHidden[idx] = false;
}
else // and it was shown before as well
{
// we need to remove the old column
if ( !Header_DeleteItem(GetHwnd(), MSWToNativeIdx(idx)) )
wxLogLastError(wxS("Header_DeleteItem()"));
}
DoInsertItem(col, idx);
}
}
void wxHeaderCtrl::DoSetColumnsOrder(const wxArrayInt& order)
{
wxArrayInt orderShown;
orderShown.reserve(m_numColumns);
for ( unsigned n = 0; n < m_numColumns; n++ )
{
const int idx = order[n];
if ( GetColumn(idx).IsShown() )
orderShown.push_back(MSWToNativeIdx(idx));
}
if ( !Header_SetOrderArray(GetHwnd(), orderShown.size(), &orderShown[0]) )
{
wxLogLastError(wxT("Header_GetOrderArray"));
}
m_colIndices = order;
}
int wxHeaderCtrl::MSWFromNativeIdx(int item)
{
wxASSERT_MSG( item >= 0 && item < GetShownColumnsCount(),
"column index out of range" );
// reverse the above function
unsigned idx = item;
for ( unsigned n = 0; n < m_numColumns; n++ )
{
if ( n > idx )
break;
if ( GetColumn(n).IsHidden() )
idx++;
}
wxASSERT_MSG( MSWToNativeIdx(idx) == item, "logic error" );
return idx;
}
void wxHeaderCtrl::DoInsertItem(const wxHeaderColumn& col, unsigned int idx)
{
wxASSERT_MSG( !col.IsHidden(), "should only be called for shown columns" );
wxHDITEM hdi;
// notice that we need to store the string we use the pointer to until we
// pass it to the control
hdi.mask |= HDI_TEXT;
wxWxCharBuffer buf = col.GetTitle().t_str();
hdi.pszText = buf.data();
hdi.cchTextMax = wxStrlen(buf);
const wxBitmap bmp = col.GetBitmap();
if ( bmp.IsOk() )
{
hdi.mask |= HDI_IMAGE;
if ( bmp.IsOk() )
{
const int bmpWidth = bmp.GetWidth(),
bmpHeight = bmp.GetHeight();
if ( !m_imageList )
{
m_imageList = new wxImageList(bmpWidth, bmpHeight);
(void) // suppress mingw32 warning about unused computed value
Header_SetImageList(GetHwnd(), GetHimagelistOf(m_imageList));
}
else // already have an image list
{
// check that all bitmaps we use have the same size
int imageWidth,
imageHeight;
m_imageList->GetSize(0, imageWidth, imageHeight);
wxASSERT_MSG( imageWidth == bmpWidth && imageHeight == bmpHeight,
"all column bitmaps must have the same size" );
}
m_imageList->Add(bmp);
hdi.iImage = m_imageList->GetImageCount() - 1;
}
else // no bitmap but we still need to update the item
{
hdi.iImage = I_IMAGENONE;
}
}
if ( col.GetAlignment() != wxALIGN_NOT )
{
hdi.mask |= HDI_FORMAT | HDF_LEFT;
switch ( col.GetAlignment() )
{
case wxALIGN_LEFT:
hdi.fmt |= HDF_LEFT;
break;
case wxALIGN_CENTER:
case wxALIGN_CENTER_HORIZONTAL:
hdi.fmt |= HDF_CENTER;
break;
case wxALIGN_RIGHT:
hdi.fmt |= HDF_RIGHT;
break;
default:
wxFAIL_MSG( "invalid column header alignment" );
}
}
if ( col.IsSortKey() )
{
hdi.mask |= HDI_FORMAT;
hdi.fmt |= col.IsSortOrderAscending() ? HDF_SORTUP : HDF_SORTDOWN;
}
if ( col.GetWidth() != wxCOL_WIDTH_DEFAULT )
{
hdi.mask |= HDI_WIDTH;
hdi.cxy = col.GetWidth();
}
hdi.mask |= HDI_ORDER;
hdi.iOrder = MSWToNativeOrder(m_colIndices.Index(idx));
if ( ::SendMessage(GetHwnd(), HDM_INSERTITEM,
MSWToNativeIdx(idx), (LPARAM)&hdi) == -1 )
{
wxLogLastError(wxT("Header_InsertItem()"));
}
}
