/////////////////////////////////////////////////////////////////////////////
-// Name: choice.cpp
+// Name: src/msw/choice.cpp
// Purpose: wxChoice
// Author: Julian Smart
// Modified by: Vadim Zeitlin to derive from wxChoiceBase
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "choice.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
return false;
// now create the real HWND
- if ( !MSWCreateControl(wxT("COMBOBOX"), _T(""), pos, size) )
+ if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
return false;
UpdateVisibleHeight();
}
+ InvalidateBestSize();
return n;
}
int wxChoice::DoInsert(const wxString& item, int pos)
{
wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
- wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
+ wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LPARAM)item.c_str());
if ( n == CB_ERR )
UpdateVisibleHeight();
}
+ InvalidateBestSize();
return n;
}
void wxChoice::Delete(int n)
{
- wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") );
+ wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
if ( HasClientObjectData() )
{
if ( !IsFrozen() )
UpdateVisibleHeight();
+
+ InvalidateBestSize();
}
void wxChoice::Clear()
if ( !IsFrozen() )
UpdateVisibleHeight();
+
+ InvalidateBestSize();
}
void wxChoice::Free()
// ----------------------------------------------------------------------------
int wxChoice::GetSelection() const
+{
+ // if m_lastAcceptedSelection is set, it means that the dropdown is
+ // currently shown and that we want to use the last "permanent" selection
+ // instead of whatever is under the mouse pointer currently
+ //
+ // otherwise, get the selection from the control
+ return m_lastAcceptedSelection == wxID_NONE ? GetCurrentSelection()
+ : m_lastAcceptedSelection;
+}
+
+int wxChoice::GetCurrentSelection() const
{
return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
}
// string list functions
// ----------------------------------------------------------------------------
-int wxChoice::GetCount() const
+size_t wxChoice::GetCount() const
{
- return (int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
+ return (size_t)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
}
-int wxChoice::FindString(const wxString& s) const
+int wxChoice::FindString(const wxString& s, bool bCase) const
{
#if defined(__WATCOMC__) && defined(__WIN386__)
// For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message.
// wxChoice::Do it the long way instead.
- int count = GetCount();
- for ( int i = 0; i < count; i++ )
+ size_t count = GetCount();
+ for ( size_t i = 0; i < count; i++ )
{
// as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too
- if ( GetString(i).IsSameAs(s, false) )
+ if ( GetString(i).IsSameAs(s, bCase) )
return i;
}
#else // !Watcom
//TODO: Evidently some MSW versions (all?) don't like empty strings
//passed to SendMessage, so we have to do it ourselves in that case
- if ( s.size() == 0 )
+ if ( s.empty() )
+ {
+ size_t count = GetCount();
+ for ( size_t i = 0; i < count; i++ )
+ {
+ if ( GetString(i).empty() )
+ return i;
+ }
+
+ return wxNOT_FOUND;
+ }
+ else if (bCase)
{
- int count = GetCount();
- for ( int i = 0; i < count; i++ )
- {
- if ( GetString(i).size() == 0 )
- return i;
- }
-
- return wxNOT_FOUND;
+ // back to base class search for not native search type
+ return wxItemContainerImmutable::FindString( s, bCase );
}
else
{
- int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
- (WPARAM)-1, (LPARAM)s.c_str());
-
- return pos == LB_ERR ? wxNOT_FOUND : pos;
+ int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
+ (WPARAM)-1, (LPARAM)s.c_str());
+
+ return pos == LB_ERR ? wxNOT_FOUND : pos;
}
#endif // Watcom/!Watcom
}
void wxChoice::SetString(int n, const wxString& s)
{
- wxCHECK_RET( n >= 0 && n < GetCount(),
- wxT("invalid item index in wxChoice::SetString") );
+ wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") );
// we have to delete and add back the string as there is no way to change a
// string in place
DoSetItemClientData(n, data);
}
//else: it's already NULL by default
+
+ InvalidateBestSize();
}
wxString wxChoice::GetString(int n) const
{
int heightOrig = height;
+ 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 )
+ if ( height != wxDefaultCoord && height != heightCurrent )
{
// don't make the drop down list too tall, arbitrarily limit it to 40
// items max and also don't leave it empty
const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
height += hItem*(nItems + 1);
}
- else
+ else // keep the same height as now
{
+ // 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
+ // 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;
+ //
+ // 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;
- DoGetSize(&w, &h);
- if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0)
+ if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r)
+ && r.bottom < 30000 )
{
- height = h + r.bottom - r.top;
+ height = heightCurrent + r.bottom - r.top;
}
}
// the combobox should be slightly larger than the widest string
wChoice += 5*GetCharWidth();
- return wxSize(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+ wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+ CacheBestSize(best);
+ return best;
}
WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
WXHWND hwnd;
UnpackCtlColor(wParam, lParam, &hdc, &hwnd);
- WXHBRUSH hbr = MSWControlColor((WXHDC)hdc);
+ WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd);
if ( hbr )
return (WXLRESULT)hbr;
//else: fall through to default window proc
bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
- if ( param != CBN_SELCHANGE)
+ /*
+ The native control provides a great variety in the events it sends in
+ the different selection scenarios (undoubtedly for greater amusement of
+ the programmers using it). For the reference, here are the cases when
+ the final selection is accepted (things are quite interesting when it
+ is cancelled too):
+
+ A. Selecting with just the arrows without opening the dropdown:
+ 1. CBN_SELENDOK
+ 2. CBN_SELCHANGE
+
+ B. Opening dropdown with F4 and selecting with arrows:
+ 1. CBN_DROPDOWN
+ 2. many CBN_SELCHANGE while changing selection in the list
+ 3. CBN_SELENDOK
+ 4. CBN_CLOSEUP
+
+ C. Selecting with the mouse:
+ 1. CBN_DROPDOWN
+ -- no intermediate CBN_SELCHANGEs --
+ 2. CBN_SELENDOK
+ 3. CBN_CLOSEUP
+ 4. CBN_SELCHANGE
+
+ Admire the different order of messages in all of those cases, it must
+ surely have taken a lot of effort to Microsoft developers to achieve
+ such originality.
+ */
+ switch ( param )
{
- // "selection changed" is the only event we're after
- return false;
- }
+ case CBN_DROPDOWN:
+ // we use this value both because we don't want to track selection
+ // using CB_GETCURSEL while the dropdown is opened and because we
+ // need to reset the selection back to it if it's eventually
+ // cancelled by user
+ m_lastAcceptedSelection = GetCurrentSelection();
+ break;
- int n = GetSelection();
- if (n > -1)
- {
- wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
- event.SetInt(n);
- event.SetEventObject(this);
- event.SetString(GetStringSelection());
- if ( HasClientObjectData() )
- event.SetClientObject( GetClientObject(n) );
- else if ( HasClientUntypedData() )
- event.SetClientData( GetClientData(n) );
- ProcessCommand(event);
+ case CBN_CLOSEUP:
+ // if the selection was accepted by the user, it should have been
+ // reset to wxID_NONE by CBN_SELENDOK, otherwise the selection was
+ // cancelled and we must restore the old one
+ if ( m_lastAcceptedSelection != wxID_NONE )
+ {
+ SetSelection(m_lastAcceptedSelection);
+ m_lastAcceptedSelection = wxID_NONE;
+ }
+ break;
+
+ case CBN_SELENDOK:
+ // reset it to prevent CBN_CLOSEUP from undoing the selection (it's
+ // ok to reset it now as GetCurrentSelection() will now return the
+ // same thing anyhow)
+ m_lastAcceptedSelection = wxID_NONE;
+
+ {
+ const int n = GetSelection();
+
+ wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
+ event.SetInt(n);
+ event.SetEventObject(this);
+
+ if ( n > -1 )
+ {
+ event.SetString(GetStringSelection());
+ if ( HasClientObjectData() )
+ event.SetClientObject( GetClientObject(n) );
+ else if ( HasClientUntypedData() )
+ event.SetClientData( GetClientData(n) );
+ }
+
+ ProcessCommand(event);
+ }
+ break;
+
+ // don't handle CBN_SELENDCANCEL: just leave m_lastAcceptedSelection
+ // valid and the selection will be undone in CBN_CLOSEUP above
+
+ // don't handle CBN_SELCHANGE neither, we don't want to generate events
+ // while the dropdown is opened -- but do add it if we ever need this
+
+ default:
+ return false;
}
return true;
}
-WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC)
+WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
{
if ( !IsEnabled() )
return MSWControlColorDisabled(hDC);
- return wxChoiceBase::MSWControlColorSolid(hDC);
+ return wxChoiceBase::MSWControlColor(hDC, hWnd);
}
#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)
-
projects / wxWidgets.git / blobdiff