/////////////////////////////////////////////////////////////////////////////
-// Name: choice.cpp
+// Name: src/msw/choice.cpp
// Purpose: wxChoice
// Author: Julian Smart
// Modified by: Vadim Zeitlin to derive from wxChoiceBase
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation "choice.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
+#if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
+
+#include "wx/choice.h"
+
#ifndef WX_PRECOMP
- #include "wx/choice.h"
#include "wx/utils.h"
#include "wx/log.h"
+ #include "wx/brush.h"
#include "wx/settings.h"
#endif
#include "wx/msw/private.h"
- IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
+#if wxUSE_EXTENDED_RTTI
+WX_DEFINE_FLAGS( wxChoiceStyle )
+
+wxBEGIN_FLAGS( wxChoiceStyle )
+ // new style border flags, we put them first to
+ // use them for streaming out
+ wxFLAGS_MEMBER(wxBORDER_SIMPLE)
+ wxFLAGS_MEMBER(wxBORDER_SUNKEN)
+ wxFLAGS_MEMBER(wxBORDER_DOUBLE)
+ wxFLAGS_MEMBER(wxBORDER_RAISED)
+ wxFLAGS_MEMBER(wxBORDER_STATIC)
+ wxFLAGS_MEMBER(wxBORDER_NONE)
+
+ // old style border flags
+ wxFLAGS_MEMBER(wxSIMPLE_BORDER)
+ wxFLAGS_MEMBER(wxSUNKEN_BORDER)
+ wxFLAGS_MEMBER(wxDOUBLE_BORDER)
+ wxFLAGS_MEMBER(wxRAISED_BORDER)
+ wxFLAGS_MEMBER(wxSTATIC_BORDER)
+ wxFLAGS_MEMBER(wxBORDER)
+
+ // standard window styles
+ wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
+ wxFLAGS_MEMBER(wxCLIP_CHILDREN)
+ wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
+ wxFLAGS_MEMBER(wxWANTS_CHARS)
+ wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
+ wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
+ wxFLAGS_MEMBER(wxVSCROLL)
+ wxFLAGS_MEMBER(wxHSCROLL)
+
+wxEND_FLAGS( wxChoiceStyle )
+
+IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControlWithItems,"wx/choice.h")
+
+wxBEGIN_PROPERTIES_TABLE(wxChoice)
+ wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent )
+
+ wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
+ wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
+ wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
+ wxPROPERTY_FLAGS( WindowStyle , wxChoiceStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
+wxEND_PROPERTIES_TABLE()
+
+wxBEGIN_HANDLERS_TABLE(wxChoice)
+wxEND_HANDLERS_TABLE()
+
+wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
+#else
+IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems)
+#endif
+/*
+ TODO PROPERTIES
+ selection (long)
+ content (list)
+ item
+*/
// ============================================================================
// implementation
const wxValidator& validator,
const wxString& name)
{
- if ( !CreateControl(parent, id, pos, size, style, validator, name) )
- return FALSE;
-
- long msStyle = WS_CHILD | CBS_DROPDOWNLIST | WS_TABSTOP | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL;
- if ( style & wxCB_SORT )
- msStyle |= CBS_SORT;
-
- // the experience shows that wxChoice vs. wxComboBox distinction confuses
+ // Experience shows that wxChoice vs. wxComboBox distinction confuses
// quite a few people - try to help them
wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
!(style & wxCB_READONLY) &&
!(style & wxCB_SIMPLE),
- wxT("this style flag is ignored by wxChoice, you "
- "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);
+}
+
+bool wxChoice::CreateAndInit(wxWindow *parent,
+ wxWindowID id,
+ const wxPoint& pos,
+ const wxSize& size,
+ int n, const wxString choices[],
+ long style,
+ const wxValidator& validator,
+ const wxString& name)
+{
+ // initialize wxControl
+ if ( !CreateControl(parent, id, pos, size, style, validator, name) )
+ return false;
- if ( !MSWCreateControl(wxT("COMBOBOX"), msStyle) )
- return FALSE;
+ // now create the real HWND
+ if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
+ return false;
- // A choice/combobox normally has a white background (or other, depending
- // on global settings) rather than inheriting the parent's background colour.
- SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
+ // choice/combobox normally has "white" (depends on colour scheme, of
+ // course) background rather than inheriting the parent's background
+ SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
+
+ // initialize the controls contents
for ( int i = 0; i < n; i++ )
{
Append(choices[i]);
}
- SetSize(pos.x, pos.y, size.x, size.y);
+ // and now we may finally size the control properly (if needed)
+ SetInitialSize(size);
+
+ return true;
+}
+
+void wxChoice::SetLabel(const wxString& label)
+{
+ if ( FindString(label) == wxNOT_FOUND )
+ {
+ // unless we explicitly do this here, CB_GETCURSEL will continue to
+ // return the index of the previously selected item which will result
+ // in wrongly replacing the value being set now with the previously
+ // value if the user simply opens and closes (without selecting
+ // anything) the combobox popup
+ SetSelection(-1);
+ }
+
+ wxChoiceBase::SetLabel(label);
+}
- return TRUE;
+bool wxChoice::Create(wxWindow *parent,
+ wxWindowID id,
+ const wxPoint& pos,
+ const wxSize& size,
+ const wxArrayString& choices,
+ long style,
+ const wxValidator& validator,
+ const wxString& name)
+{
+ wxCArrayString chs(choices);
+ return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
+ style, validator, name);
+}
+
+bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg)
+{
+ MSG *msg = (MSG *) pMsg;
+
+ // if the dropdown list is visible, don't preprocess certain keys
+ if ( msg->message == WM_KEYDOWN
+ && (msg->wParam == VK_ESCAPE || msg->wParam == VK_RETURN) )
+ {
+ if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0))
+ {
+ return false;
+ }
+ }
+
+ return wxControl::MSWShouldPreProcessMessage(pMsg);
+}
+
+WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
+{
+ // we never have an external border
+ WXDWORD msStyle = wxControl::MSWGetStyle
+ (
+ (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
+ );
+
+ // WS_CLIPSIBLINGS is useful with wxChoice and doesn't seem to result in
+ // any problems
+ msStyle |= WS_CLIPSIBLINGS;
+
+ // wxChoice-specific styles
+ msStyle |= CBS_DROPDOWNLIST | WS_HSCROLL | WS_VSCROLL;
+ if ( style & wxCB_SORT )
+ msStyle |= CBS_SORT;
+
+ return msStyle;
}
wxChoice::~wxChoice()
{
- Free();
+ Clear();
}
// ----------------------------------------------------------------------------
// adding/deleting items to/from the list
// ----------------------------------------------------------------------------
-int wxChoice::DoAppend(const wxString& item)
+int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items,
+ unsigned int pos,
+ void **clientData, wxClientDataType type)
{
- int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LONG)item.c_str());
- if ( n == CB_ERR )
+ MSWAllocStorage(items, CB_INITSTORAGE);
+
+ const bool append = pos == GetCount();
+
+ // use CB_ADDSTRING when appending at the end to make sure the control is
+ // resorted if it has wxCB_SORT style
+ const unsigned msg = append ? CB_ADDSTRING : CB_INSERTSTRING;
+
+ if ( append )
+ pos = 0;
+
+ int n = wxNOT_FOUND;
+ const unsigned numItems = items.GetCount();
+ for ( unsigned i = 0; i < numItems; ++i )
{
- wxLogLastError("SendMessage(CB_ADDSTRING)");
+ n = MSWInsertOrAppendItem(pos, items[i], msg);
+ if ( n == wxNOT_FOUND )
+ return n;
+
+ if ( !append )
+ pos++;
+
+ AssignNewItemClientData(n, clientData, i, type);
}
+ // we need to refresh our size in order to have enough space for the
+ // newly added items
+ if ( !IsFrozen() )
+ MSWUpdateDropDownHeight();
+
+ InvalidateBestSize();
+
return n;
}
-void wxChoice::Delete(int n)
+void wxChoice::DoDeleteOneItem(unsigned int n)
{
- wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") );
-
- if ( HasClientObjectData() )
- {
- delete GetClientObject(n);
- }
+ wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
-}
-void wxChoice::Clear()
-{
- Free();
+ if ( !IsFrozen() )
+ MSWUpdateDropDownHeight();
- SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+ InvalidateBestSize();
}
-void wxChoice::Free()
+void wxChoice::DoClear()
{
- if ( HasClientObjectData() )
- {
- size_t count = GetCount();
- for ( size_t n = 0; n < count; n++ )
- {
- delete GetClientObject(n);
- }
- }
+ SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+
+ if ( !IsFrozen() )
+ MSWUpdateDropDownHeight();
+
+ InvalidateBestSize();
}
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
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
+unsigned int wxChoice::GetCount() const
{
- return (int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
+ return (unsigned int)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++ )
+ unsigned int count = GetCount();
+ for ( unsigned int 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;
}
return wxNOT_FOUND;
#else // !Watcom
- int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
- (WPARAM)-1, (LPARAM)s.c_str());
-
- return pos == LB_ERR ? wxNOT_FOUND : pos;
+ //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.empty() )
+ {
+ unsigned int count = GetCount();
+ for ( unsigned int i = 0; i < count; i++ )
+ {
+ if (GetString(i).empty())
+ return i;
+ }
+
+ return wxNOT_FOUND;
+ }
+ else if (bCase)
+ {
+ // 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.wx_str());
+
+ return pos == LB_ERR ? wxNOT_FOUND : pos;
+ }
#endif // Watcom/!Watcom
}
-void wxChoice::SetString(int n, const wxString& s)
+void wxChoice::SetString(unsigned int n, const wxString& s)
{
- wxFAIL_MSG(wxT("not implemented"));
+ wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") );
-#if 0 // should do this, but no Insert() so far
- Delete(n);
- Insert(n + 1, s);
-#endif
+ // we have to delete and add back the string as there is no way to change a
+ // string in place
+
+ // we need to preserve the client data manually
+ void *oldData = NULL;
+ wxClientData *oldObjData = NULL;
+ if ( HasClientUntypedData() )
+ oldData = GetClientData(n);
+ else if ( HasClientObjectData() )
+ oldObjData = GetClientObject(n);
+
+ ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+ ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.wx_str() );
+
+ // restore the client data
+ if ( oldData )
+ SetClientData(n, oldData);
+ else if ( oldObjData )
+ SetClientObject(n, oldObjData);
+
+ InvalidateBestSize();
}
-wxString wxChoice::GetString(int n) const
+wxString wxChoice::GetString(unsigned int n) const
{
- size_t len = (size_t)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
+ int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
+
wxString str;
- if (len) {
- if ( ::SendMessage(GetHwnd(), CB_GETLBTEXT, n,
- (LPARAM)str.GetWriteBuf(len)) == CB_ERR ) {
- wxLogLastError("SendMessage(CB_GETLBTEXT)");
+ if ( len != CB_ERR && len > 0 )
+ {
+ if ( ::SendMessage
+ (
+ GetHwnd(),
+ CB_GETLBTEXT,
+ n,
+ (LPARAM)(wxChar *)wxStringBuffer(str, len)
+ ) == CB_ERR )
+ {
+ wxLogLastError(wxT("SendMessage(CB_GETLBTEXT)"));
}
- str.UngetWriteBuf();
}
return str;
// client data
// ----------------------------------------------------------------------------
-void wxChoice::DoSetItemClientData( int n, void* clientData )
+void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)
{
- if ( SendMessage(GetHwnd(), CB_SETITEMDATA, n, (LPARAM)clientData) == CB_ERR )
+ if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
+ n, (LPARAM)clientData) == CB_ERR )
{
wxLogLastError(wxT("CB_SETITEMDATA"));
}
}
-void* wxChoice::DoGetItemClientData( int n ) const
+void* wxChoice::DoGetItemClientData(unsigned int n) const
{
LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
if ( rc == CB_ERR )
return (void *)rc;
}
-void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
+// ----------------------------------------------------------------------------
+// wxMSW-specific geometry management
+// ----------------------------------------------------------------------------
+
+namespace
{
- DoSetItemClientData(n, clientData);
+
+// 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);
+ }
}
-wxClientData* wxChoice::DoGetItemClientObject( int n ) const
+#if wxUSE_DEFERRED_SIZING
+void wxChoice::MSWEndDeferWindowPos()
{
- return (wxClientData *)DoGetItemClientData(n);
+ // 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
-// ----------------------------------------------------------------------------
-// wxMSW specific helpers
-// ----------------------------------------------------------------------------
+void wxChoice::MSWUpdateDropDownHeight()
+{
+ // be careful to not change the width here
+ DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y,
+ wxSIZE_USE_EXISTING);
+}
+
+void wxChoice::DoMoveWindow(int x, int y, int width, int height)
+{
+ // here is why this is necessary: if the width is negative, the combobox
+ // window proc makes the window of the size width*height instead of
+ // interpreting height in the usual manner (meaning the height of the drop
+ // down list - usually the height specified in the call to MoveWindow()
+ // will not change the height of combo box per se)
+ //
+ // this behaviour is not documented anywhere, but this is just how it is
+ // here (NT 4.4) and, anyhow, the check shouldn't hurt - however without
+ // the check, constraints/sizers using combos may break the height
+ // constraint will have not at all the same value as expected
+ if ( width < 0 )
+ return;
+
+ wxControl::DoMoveWindow(x, y, width, 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 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)
{
- // Ignore height parameter because height doesn't mean 'initially
- // displayed' height, it refers to the drop-down menu as well. The
- // wxWindows interpretation is different; also, getting the size returns
- // the _displayed_ size (NOT the drop down menu size) so
- // setting-getting-setting size would not work.
- wxControl::DoSetSize(x, y, width, -1, sizeFlags);
+ // 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)
+ 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 // 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;
+ }
+
+ const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
+ int heightWithItems = 0;
+ if (!HasFlag(wxCB_SIMPLE))
+ heightWithItems = height + hItem*nItems;
+ else
+ heightWithItems = SetHeightSimpleComboBox(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 )
+ {
+ // not using deferred sizing, update it immediately
+ MSWUpdateVisibleHeight();
+ }
+ else // in the middle of deferred sizing
+ {
+ // 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);
+ }
+#else // !wxUSE_DEFERRED_SIZING
+ // always update the visible height immediately
+ MSWUpdateVisibleHeight();
+#endif // wxUSE_DEFERRED_SIZING
}
-wxSize wxChoice::DoGetBestSize()
+wxSize wxChoice::DoGetBestSize() const
{
// find the widest string
- int wLine;
int wChoice = 0;
- int nItems = GetCount();
- for ( int i = 0; i < nItems; i++ )
+ int hChoice;
+ const unsigned int nItems = GetCount();
+ for ( unsigned int i = 0; i < nItems; i++ )
{
- wxString str(GetString(i));
- GetTextExtent(str, &wLine, NULL);
+ int wLine;
+ GetTextExtent(GetString(i), &wLine, NULL);
if ( wLine > wChoice )
wChoice = wLine;
}
if ( wChoice == 0 )
wChoice = 100;
- // the combobox should be larger than the widest string
- int cx, cy;
- wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
-
- wChoice += 5*cx;
+ // 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());
- // Choice drop-down list depends on number of items (limited to 10)
- size_t nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
- int hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*nStrings;
+ wxSize best(wChoice, hChoice);
+ CacheBestSize(best);
+ return best;
+}
- return wxSize(wChoice, hChoice);
+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;
}
-long wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+// ----------------------------------------------------------------------------
+// MSW message handlers
+// ----------------------------------------------------------------------------
+
+WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
- if ( nMsg == WM_LBUTTONUP )
+ switch ( nMsg )
{
- int x = (int)LOWORD(lParam);
- int y = (int)HIWORD(lParam);
-
- // Ok, this is truly weird, but if a panel with a wxChoice loses the
- // focus, then you get a *fake* WM_LBUTTONUP message with x = 65535 and
- // y = 65535. Filter out this nonsense.
- //
- // VZ: I'd like to know how to reproduce this please...
- if ( x == 65535 && y == 65535 )
- return 0;
+ case WM_LBUTTONUP:
+ {
+ int x = (int)LOWORD(lParam);
+ int y = (int)HIWORD(lParam);
+
+ // Ok, this is truly weird, but if a panel with a wxChoice
+ // loses the focus, then you get a *fake* WM_LBUTTONUP message
+ // with x = 65535 and y = 65535. Filter out this nonsense.
+ //
+ // VZ: I'd like to know how to reproduce this please...
+ if ( x == 65535 && y == 65535 )
+ return 0;
+ }
+ break;
+
+ // we have to handle both: one for the normal case and the other
+ // for readonly
+ case WM_CTLCOLOREDIT:
+ case WM_CTLCOLORLISTBOX:
+ case WM_CTLCOLORSTATIC:
+ {
+ WXHDC hdc;
+ WXHWND hwnd;
+ UnpackCtlColor(wParam, lParam, &hdc, &hwnd);
+
+ WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd);
+ if ( hbr )
+ return (WXLRESULT)hbr;
+ //else: fall through to default window proc
+ }
}
return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
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;
+
+ 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());
+ InitCommandEventWithItems(event, 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;
}
- 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);
- }
+ return true;
+}
+
+WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
+{
+ if ( !IsEnabled() )
+ return MSWControlColorDisabled(hDC);
- return TRUE;
+ return wxChoiceBase::MSWControlColor(hDC, hWnd);
}
+#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)
projects / wxWidgets.git / blobdiff