// we need to refresh our size in order to have enough space for the
// newly added items
if ( !IsFrozen() )
- UpdateVisibleHeight();
+ MSWUpdateDropDownHeight();
InvalidateBestSize();
SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
if ( !IsFrozen() )
- UpdateVisibleHeight();
+ MSWUpdateDropDownHeight();
InvalidateBestSize();
}
SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
if ( !IsFrozen() )
- UpdateVisibleHeight();
+ MSWUpdateDropDownHeight();
InvalidateBestSize();
}
}
// ----------------------------------------------------------------------------
-// wxMSW specific helpers
+// wxMSW-specific geometry management
// ----------------------------------------------------------------------------
-void wxChoice::UpdateVisibleHeight()
+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 - COMBO_HEIGHT_ADJ);
+ }
+}
+
+#if wxUSE_DEFERRED_SIZING
+void wxChoice::MSWEndDeferWindowPos()
+{
+ // we can only set the height of the choice itself now as it is reset to
+ // default every time the control is resized
+ MSWUpdateVisibleHeight();
+
+ wxChoiceBase::MSWEndDeferWindowPos();
+}
+#endif // wxUSE_DEFERRED_SIZING
+
+void wxChoice::MSWUpdateDropDownHeight()
{
// be careful to not change the width here
- DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, wxSIZE_USE_EXISTING);
+ DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y,
+ wxSIZE_USE_EXISTING);
}
void wxChoice::DoMoveWindow(int x, int y, int width, int height)
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)
{
- 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 )
{
- // don't make the drop down list too tall, arbitrarily limit it to 40
- // items max and also don't leave it empty
- size_t nItems = GetCount();
- if ( !nItems )
- nItems = 9;
- else if ( nItems > 24 )
- nItems = 24;
-
- // add space for the drop down list
- const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
- height += hItem*(nItems + 1);
+ // 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)
+ m_heightOwn = height;
+
+ 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
+ else // height not specified
{
- // 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;
- }
+ DoGetSize(NULL, &height);
}
- wxControl::DoSetSize(x, y, width, height, sizeFlags);
-
- // If we're storing a pending size, make sure we store
- // the original size for reporting back to the app.
- if (m_pendingSize != wxDefaultSize)
- m_pendingSize = wxSize(width, heightOrig);
-
- // This solution works on XP, but causes choice/combobox lists to be
- // too short on W2K and earlier.
-#if 0
- int widthCurrent, heightCurrent;
- DoGetSize(&widthCurrent, &heightCurrent);
// 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 && height != heightCurrent )
+ // 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 ( !nItems )
+ nItems = 9;
+ else if ( nItems > 30 )
+ nItems = 30;
+
+ const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
+ const int heightWithItems = height + hItem*nItems;
+
+
+ // do resize the native control
+ wxControl::DoSetSize(x, y, width, heightWithItems, 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
+ // the height is reset to default during the control layout) and that it's
+ // useless to to do it when using the deferred sizing -- in this case it
+ // will be done from MSWEndDeferWindowPos()
+#if wxUSE_DEFERRED_SIZING
+ if ( m_pendingSize == wxDefaultSize )
{
- // don't make the drop down list too tall, arbitrarily limit it to 40
- // items max and also don't leave it empty
- unsigned int nItems = GetCount();
- if ( !nItems )
- nItems = 9;
- else if ( nItems > 24 )
- nItems = 24;
-
- // add space for the drop down list
- const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
- height += hItem*(nItems + 1);
+ // not using deferred sizing, update it immediately
+ MSWUpdateVisibleHeight();
}
- else // keep the same height as now
+ else // in the middle of deferred sizing
{
- // normally wxWindow::DoSetSize() checks if we set the same size as the
- // window already has and does nothing in this case, but for us the
- // check fails as the size we pass to it includes the dropdown while
- // the size returned by our GetSize() does not, so test if the size
- // didn't really change ourselves here
- if ( width == wxDefaultCoord || width == widthCurrent )
- {
- // size doesn't change, what about position?
- int xCurrent, yCurrent;
- DoGetPosition(&xCurrent, &yCurrent);
- const bool defMeansUnchanged = !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE);
- if ( ((x == wxDefaultCoord && defMeansUnchanged) || x == xCurrent)
- &&
- ((y == wxDefaultCoord && defMeansUnchanged) || y == yCurrent) )
- {
- // nothing changes, nothing to do
- return;
- }
- }
-
- // 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.
- //
- // Also notice that sometimes CB_GETDROPPEDCONTROLRECT seems to return
- // wildly incorrect values (~32000) which looks like a bug in it, just
- // ignore them in this case
- RECT r;
- if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r)
- && r.bottom < 30000 )
- {
- height = heightCurrent + r.bottom - r.top;
- }
+ // 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, height);
}
-
- wxControl::DoSetSize(x, y, width, height, sizeFlags);
-#endif
+#else // !wxUSE_DEFERRED_SIZING
+ // always update the visible height immediately
+ MSWUpdateVisibleHeight();
+#endif // wxUSE_DEFERRED_SIZING
}
wxSize wxChoice::DoGetBestSize() const
return best;
}
+// ----------------------------------------------------------------------------
+// MSW message handlers
+// ----------------------------------------------------------------------------
+
WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
switch ( nMsg )
// need to reset the selection back to it if it's eventually
// cancelled by user
m_lastAcceptedSelection = GetCurrentSelection();
- if ( m_lastAcceptedSelection == -1 )
- {
- // no current selection so no need to restore it later (this
- // happens when opening a combobox containing text not from its
- // list of items and we shouldn't erase this text)
- m_lastAcceptedSelection = wxID_NONE;
- }
break;
case CBN_CLOSEUP:
projects / wxWidgets.git / blobdiff