wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
!(style & wxCB_READONLY) &&
!(style & wxCB_SIMPLE),
- _T("this style flag is ignored by wxChoice, you ")
- _T("probably want to use a wxComboBox") );
+ wxT("this style flag is ignored by wxChoice, you ")
+ wxT("probably want to use a wxComboBox") );
return CreateAndInit(parent, id, pos, size, n, choices, style,
validator, name);
// wxMSW-specific geometry management
// ----------------------------------------------------------------------------
+namespace
+{
+
+// there is a difference between the height passed to CB_SETITEMHEIGHT and the
+// real height of the combobox; it is probably not constant for all Windows
+// versions/settings but right now I don't know how to find what it is so it is
+// temporarily hardcoded to its value under XP systems with normal fonts sizes
+const int COMBO_HEIGHT_ADJ = 6;
+
+} // anonymous namespace
+
void wxChoice::MSWUpdateVisibleHeight()
{
if ( m_heightOwn != wxDefaultCoord )
- ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT, (WPARAM)-1, m_heightOwn);
+ {
+ ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT,
+ (WPARAM)-1, m_heightOwn - COMBO_HEIGHT_ADJ);
+ }
}
#if wxUSE_DEFERRED_SIZING
void wxChoice::DoGetSize(int *w, int *h) const
{
+ wxControl::DoGetSize(w, h);
+
// this is weird: sometimes, the height returned by Windows is clearly the
// total height of the control including the drop down list -- but only
- // sometimes, and normally it isn't... I have no idea about what to do with
- // this
- wxControl::DoGetSize(w, h);
+ // sometimes, and sometimes it isn't so work around this here by using our
+ // own stored value if we have it
+ if ( h && m_heightOwn != wxDefaultCoord )
+ *h = m_heightOwn;
}
void wxChoice::DoSetSize(int x, int y,
int width, int height,
int sizeFlags)
{
- const int heightOrig = height;
-
- // the height which we must pass to Windows should be the total height of
- // the control including the drop down list while the height given to us
- // is, of course, just the height of the permanently visible part of it
- if ( height != wxDefaultCoord )
+ // we need the real height below so get the current one if it's not given
+ if ( height != wxDefaultCoord && height != GetBestSize().y )
{
// set our new own height but be careful not to make it too big: the
// native control apparently stores it as a single byte and so setting
// own height to 256 pixels results in default height being used (255
// is still ok)
- if ( height > UCHAR_MAX )
- height = UCHAR_MAX;
m_heightOwn = height;
- // don't make the drop down list too tall, arbitrarily limit it to 30
- // items max and also don't make it too small if it's currently empty
- size_t nItems = GetCount();
+ if ( m_heightOwn > UCHAR_MAX )
+ m_heightOwn = UCHAR_MAX;
+ // nor too small: see MSWUpdateVisibleHeight()
+ else if ( m_heightOwn < COMBO_HEIGHT_ADJ )
+ m_heightOwn = COMBO_HEIGHT_ADJ;
+ }
+ else // height not specified
+ {
+ DoGetSize(NULL, &height);
+ }
+
+
+ // the height which we must pass to Windows should be the total height of
+ // the control including the drop down list while the height given to us
+ // is, of course, just the height of the permanently visible part of it so
+ // add the drop down height to it
+
+ // don't make the drop down list too tall, arbitrarily limit it to 30
+ // items max and also don't make it too small if it's currently empty
+ size_t nItems = GetCount();
+ if (!HasFlag(wxCB_SIMPLE))
+ {
if ( !nItems )
nItems = 9;
else if ( nItems > 30 )
nItems = 30;
-
- // add space for the drop down list
- const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
- height += hItem*(nItems + 1);
}
+
+ const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
+ int heightWithItems = 0;
+ if (!HasFlag(wxCB_SIMPLE))
+ heightWithItems = height + hItem*nItems;
else
- {
- // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
- // wxGetWindowRect() to determine the current height of the combobox,
- // and then again sets the combobox's height to that value. Unfortunately,
- // wxGetWindowRect doesn't include the dropdown list's height (at least
- // on Win2K), so this would result in a combobox with dropdown height of
- // 1 pixel. We have to determine the default height ourselves and call
- // wxControl with that value instead.
- int w, h;
- RECT r;
- DoGetSize(&w, &h);
- if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0)
- {
- height = h + r.bottom - r.top;
- }
- }
+ heightWithItems = SetHeightSimpleComboBox(nItems);
+
+
+ // do resize the native control
+ wxControl::DoSetSize(x, y, width, heightWithItems, sizeFlags);
- wxControl::DoSetSize(x, y, width, height, sizeFlags);
// make the control itself of the requested height: notice that this
// must be done after changing its size or it has no effect (apparently
{
// we need to report the size of the visible part of the control back
// in GetSize() and not height stored by DoSetSize() in m_pendingSize
- m_pendingSize = wxSize(width, heightOrig);
+ m_pendingSize = wxSize(width, height);
}
#else // !wxUSE_DEFERRED_SIZING
// always update the visible height immediately
{
// find the widest string
int wChoice = 0;
+ int hChoice;
const unsigned int nItems = GetCount();
for ( unsigned int i = 0; i < nItems; i++ )
{
// the combobox should be slightly larger than the widest string
wChoice += 5*GetCharWidth();
+ if( HasFlag( wxCB_SIMPLE ) )
+ {
+ hChoice = SetHeightSimpleComboBox( nItems );
+ }
+ else
+ hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight());
- wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+ wxSize best(wChoice, hChoice);
CacheBestSize(best);
return best;
}
+int wxChoice::SetHeightSimpleComboBox(int nItems) const
+{
+ int cx, cy;
+ wxGetCharSize( GetHWND(), &cx, &cy, GetFont() );
+ int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
+ return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1;
+}
+
// ----------------------------------------------------------------------------
// MSW message handlers
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff