/////////////////////////////////////////////////////////////////////////////
-// Name: choice.cpp
+// Name: src/msw/choice.cpp
// Purpose: wxChoice
// Author: Julian Smart
-// Modified by:
+// 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
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "choice.h"
-#endif
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
-#ifndef WX_PRECOMP
+#if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
+
#include "wx/choice.h"
-#include "wx/utils.h"
-#include "wx/log.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/utils.h"
+ #include "wx/app.h"
+ #include "wx/log.h"
+ #include "wx/brush.h"
+ #include "wx/settings.h"
#endif
+#include "wx/dynlib.h"
+
#include "wx/msw/private.h"
-#if !USE_SHARED_LIBRARY
-IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
-#endif
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// creation
+// ----------------------------------------------------------------------------
+
+bool wxChoice::Create(wxWindow *parent,
+ wxWindowID id,
+ const wxPoint& pos,
+ const wxSize& size,
+ int n, const wxString choices[],
+ long style,
+ const wxValidator& validator,
+ const wxString& name)
+{
+ // 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 ")
+ wxT("probably want to use a wxComboBox") );
+
+ return CreateAndInit(parent, id, pos, size, n, choices, style,
+ validator, name);
+}
-bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
+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)
{
- if (param == CBN_SELCHANGE)
- {
- wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
- event.SetInt(GetSelection());
- event.SetEventObject(this);
- event.SetString(GetStringSelection());
- ProcessCommand(event);
-
- return TRUE;
- }
- else
- return FALSE;
-}
-
-bool wxChoice::Create(wxWindow *parent, wxWindowID id,
- const wxPoint& pos,
- const wxSize& size,
- int n, const wxString choices[],
- long style,
- const wxValidator& validator,
- const wxString& name)
-{
- SetName(name);
- SetValidator(validator);
- if (parent) parent->AddChild(this);
- SetBackgroundColour(parent->GetBackgroundColour()) ;
- SetForegroundColour(parent->GetForegroundColour()) ;
- m_noStrings = 0;
-
- m_windowStyle = style;
-
- if ( id == -1 )
- m_windowId = (int)NewControlId();
- else
- m_windowId = id;
-
- int x = pos.x;
- int y = pos.y;
- int width = size.x;
- int height = size.y;
-
- long msStyle = WS_CHILD | CBS_DROPDOWNLIST | WS_HSCROLL | WS_VSCROLL
- | WS_TABSTOP | WS_VISIBLE;
- if (m_windowStyle & wxCB_SORT)
- msStyle |= CBS_SORT;
-
- bool want3D;
- WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
-
- // Even with extended styles, need to combine with WS_BORDER
- // for them to look right.
- if ( want3D || wxStyleHasBorder(m_windowStyle) )
- msStyle |= WS_BORDER;
-
- m_hWnd = (WXHWND)::CreateWindowEx(exStyle, _T("COMBOBOX"), NULL,
- msStyle,
- 0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
- wxGetInstance(), NULL);
-
- wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create combobox") );
-
-/*
-#if wxUSE_CTL3D
- if (want3D)
- {
- m_useCtl3D = TRUE;
- Ctl3dSubclassCtl(wx_combo); // Does CTL3D affect the combobox? I think not.
- }
+ // initialize wxControl
+ if ( !CreateControl(parent, id, pos, size, style, validator, name) )
+ return false;
+
+ // now create the real HWND
+ if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
+ return false;
+
+
+ // initialize the controls contents
+ Append(n, choices);
+
+ // 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);
+}
+
+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;
+}
+
+#ifndef EP_EDITTEXT
+ #define EP_EDITTEXT 1
+ #define ETS_NORMAL 1
#endif
-*/
- // Subclass again for purposes of dialog editing mode
- SubclassWin(m_hWnd);
+wxVisualAttributes
+wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
+{
+ // it is important to return valid values for all attributes from here,
+ // GetXXX() below rely on this
+ wxVisualAttributes attrs;
+
+ // FIXME: Use better dummy window?
+ wxWindow* wnd = wxTheApp->GetTopWindow();
+ if (!wnd)
+ return attrs;
- SetFont(parent->GetFont());
+ attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
- int i;
- for (i = 0; i < n; i++)
- {
- Append(choices[i]);
- }
- SetSelection(n);
+ // there doesn't seem to be any way to get the text colour using themes
+ // API: TMT_TEXTCOLOR doesn't work neither for EDIT nor COMBOBOX
+ attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
- SetSize(x, y, width, height);
+ // NB: use EDIT, not COMBOBOX (the latter works in XP but not Vista)
+ attrs.colBg = wnd->MSWGetThemeColour(L"EDIT",
+ EP_EDITTEXT,
+ ETS_NORMAL,
+ ThemeColourBackground,
+ wxSYS_COLOUR_WINDOW);
- return TRUE;
+ return attrs;
}
-void wxChoice::Append(const wxString& item)
+wxChoice::~wxChoice()
{
- SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LONG)(const wxChar *)item);
+ Clear();
+}
+
+bool wxChoice::MSWGetComboBoxInfo(tagCOMBOBOXINFO* info) const
+{
+ // TODO-Win9x: Get rid of this once we officially drop support for Win9x
+ // and just call the function directly.
+#if wxUSE_DYNLIB_CLASS
+ typedef BOOL (WINAPI *GetComboBoxInfo_t)(HWND, tagCOMBOBOXINFO*);
+ static GetComboBoxInfo_t s_pfnGetComboBoxInfo = NULL;
+ static bool s_triedToLoad = false;
+ if ( !s_triedToLoad )
+ {
+ s_triedToLoad = true;
+ wxLoadedDLL dllUser32("user32.dll");
+ wxDL_INIT_FUNC(s_pfn, GetComboBoxInfo, dllUser32);
+ }
+
+ if ( s_pfnGetComboBoxInfo )
+ return (*s_pfnGetComboBoxInfo)(GetHwnd(), info) != 0;
+#endif // wxUSE_DYNLIB_CLASS
+
+ return false;
+}
+
+// ----------------------------------------------------------------------------
+// adding/deleting items to/from the list
+// ----------------------------------------------------------------------------
+
+int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items,
+ unsigned int pos,
+ void **clientData, wxClientDataType type)
+{
+ 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 )
+ {
+ 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();
- m_noStrings ++;
+ InvalidateBestSize();
+
+ return n;
}
-void wxChoice::Delete(int n)
+void wxChoice::DoDeleteOneItem(unsigned int n)
{
- m_noStrings = (int)SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+ wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
+
+ SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+
+ if ( !IsFrozen() )
+ MSWUpdateDropDownHeight();
+
+ InvalidateBestSize();
}
-void wxChoice::Clear(void)
+void wxChoice::DoClear()
{
- SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+ SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+
+ if ( !IsFrozen() )
+ MSWUpdateDropDownHeight();
- m_noStrings = 0;
+ InvalidateBestSize();
}
+// ----------------------------------------------------------------------------
+// selection
+// ----------------------------------------------------------------------------
-int wxChoice::GetSelection(void) const
+int wxChoice::GetSelection() const
{
- return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
+ // 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);
}
void wxChoice::SetSelection(int n)
{
- SendMessage(GetHwnd(), CB_SETCURSEL, n, 0);
+ SendMessage(GetHwnd(), CB_SETCURSEL, n, 0);
+}
+
+// ----------------------------------------------------------------------------
+// string list functions
+// ----------------------------------------------------------------------------
+
+unsigned int wxChoice::GetCount() const
+{
+ 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.
- // Do it the long way instead.
- char buf[512];
- for (int i = 0; i < Number(); i++)
- {
- int len = (int)SendMessage(GetHwnd(), CB_GETLBTEXT, i, (LPARAM)(LPSTR)buf);
- buf[len] = 0;
- if (strcmp(buf, (const char *)s) == 0)
- return i;
- }
- return -1;
-#else
- int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT, (WPARAM)-1, (LPARAM)(LPSTR)(const wxChar *)s);
- if (pos == LB_ERR)
- return -1;
- else
- return pos;
-#endif
+ // For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message.
+ // wxChoice::Do it the long way instead.
+ 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, bCase))
+ return i;
+ }
+
+ return wxNOT_FOUND;
+#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.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, wxMSW_CONV_LPARAM(s));
+
+ return pos == LB_ERR ? wxNOT_FOUND : pos;
+ }
+#endif // Watcom/!Watcom
}
-wxString wxChoice::GetString(int n) const
+void wxChoice::SetString(unsigned int n, const wxString& s)
{
- size_t len = (size_t)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
+ 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
+
+ // 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);
+
+ // and also the selection if we're going to delete the item that was
+ // selected
+ const bool wasSelected = static_cast<int>(n) == GetSelection();
+
+ ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+ ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, wxMSW_CONV_LPARAM(s) );
+
+ // restore the client data
+ if ( oldData )
+ SetClientData(n, oldData);
+ else if ( oldObjData )
+ SetClientObject(n, oldObjData);
+
+ // and the selection
+ if ( wasSelected )
+ SetSelection(n);
+
+ // the width could have changed so the best size needs to be recomputed
+ InvalidateBestSize();
+}
+
+wxString wxChoice::GetString(unsigned int n) const
+{
+ int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
+
wxString str;
- if ( ::SendMessage(GetHwnd(), CB_GETLBTEXT, n,
- (LPARAM)str.GetWriteBuf(len)) == CB_ERR )
+ if ( len != CB_ERR && len > 0 )
{
- wxLogLastError("SendMessage(CB_GETLBTEXT)");
+ 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(unsigned int n, void* clientData)
+{
+ if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
+ n, (LPARAM)clientData) == CB_ERR )
+ {
+ wxLogLastError(wxT("CB_SETITEMDATA"));
+ }
+}
+
+void* wxChoice::DoGetItemClientData(unsigned int n) const
+{
+ LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
+ if ( rc == CB_ERR && GetLastError() != ERROR_SUCCESS )
+ {
+ wxLogLastError(wxT("CB_GETITEMDATA"));
+
+ // unfortunately, there is no way to return an error code to the user
+ rc = (LPARAM) NULL;
+ }
+
+ return (void *)rc;
+}
+
+// ----------------------------------------------------------------------------
+// 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 - 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);
+}
+
+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);
-}
+ const int heightBest = GetBestSize().y;
-wxSize wxChoice::DoGetBestSize()
-{
- // find the widest string
- int wLine;
- int wChoice = 0;
- for ( int i = 0; i < m_noStrings; i++ )
+ // we need the real height below so get the current one if it's not given
+ if ( height == wxDefaultCoord )
{
- wxString str(GetString(i));
- GetTextExtent(str, &wLine, NULL);
- if ( wLine > wChoice )
- wChoice = wLine;
+ // height not specified, use the same as before
+ DoGetSize(NULL, &height);
+ }
+ else if ( height == heightBest )
+ {
+ // we don't need to manually manage our height, let the system use the
+ // default one
+ m_heightOwn = wxDefaultCoord;
+ }
+ else // non-default height specified
+ {
+ // 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;
}
- // give it some reasonable default value if there are no strings in the
- // list
- if ( wChoice == 0 )
- wChoice = 100;
- // the combobox should be larger than the widest string
- int cx, cy;
- wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
+ // 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))
+ // The extra item (" + 1") is required to prevent a vertical
+ // scrollbar from appearing with comctl32.dll versions earlier
+ // than 6.0 (such as found in Win2k).
+ heightWithItems = height + hItem*(nItems + 1);
+ else
+ heightWithItems = SetHeightSimpleComboBox(nItems);
+
- wChoice += 5*cx;
+ // do resize the native control
+ wxControl::DoSetSize(x, y, width, heightWithItems, sizeFlags);
- // Choice drop-down list depends on number of items (limited to 10)
- size_t nStrings = m_noStrings == 0 ? 10 : wxMin(10, m_noStrings) + 1;
- int hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*nStrings;
- return wxSize(wChoice, hChoice);
+ // 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 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() const
+{
+ // The base version returns the size of the largest string
+ return GetSizeFromTextSize(wxChoiceBase::DoGetBestSize().x);
}
-WXHBRUSH wxChoice::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
- WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
+int wxChoice::SetHeightSimpleComboBox(int nItems) const
{
- return 0;
+ 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)
+wxSize wxChoice::DoGetSizeFromTextSize(int xlen, int ylen) const
{
- switch (nMsg)
+ int cHeight = GetCharHeight();
+
+ // We are interested in the difference of sizes between the whole control
+ // and its child part. I.e. arrow, separators, etc.
+ wxSize tsize(xlen, 0);
+
+ // FIXME-VC6: Only VC6 needs this guard, see WINVER definition in
+ // include/wx/msw/wrapwin.h
+#if defined(WINVER) && WINVER >= 0x0500
+ WinStruct<COMBOBOXINFO> info;
+ if ( MSWGetComboBoxInfo(&info) )
{
-/*
- case WM_GETDLGCODE:
- {
- if (GetWindowStyleFlag() & wxPROCESS_ENTER)
- return DLGC_WANTALLKEYS;
- break;
- }
-*/
-/*
- case WM_CHAR: // Always an ASCII character
- {
- if (wParam == VK_RETURN)
- {
- wxCommandEvent event(wxEVENT_TYPE_TEXT_ENTER_COMMAND);
- event.commandString = ((wxTextCtrl *)item)->GetValue();
- event.eventObject = item;
- item->ProcessCommand(event);
- return FALSE;
- }
- break;
- }
-*/
- 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.
- if (x == 65535 && y == 65535)
- return 0;
- break;
- }
+ tsize.x += info.rcItem.left + info.rcButton.right - info.rcItem.right
+ + info.rcItem.left + 3; // right and extra margins
}
+ else // Just use some rough approximation.
+#endif // WINVER >= 0x0500
+ {
+ tsize.x += 4*cHeight;
+ }
+
+ // set height on our own
+ if( HasFlag( wxCB_SIMPLE ) )
+ tsize.y = SetHeightSimpleComboBox(GetCount());
+ else
+ tsize.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cHeight);
- return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
+ // Perhaps the user wants something different from CharHeight
+ if ( ylen > 0 )
+ tsize.IncBy(0, ylen - cHeight);
+
+ return tsize;
+}
+
+// ----------------------------------------------------------------------------
+// Popup operations
+// ----------------------------------------------------------------------------
+
+void wxChoice::MSWDoPopupOrDismiss(bool show)
+{
+ wxASSERT_MSG( !HasFlag(wxCB_SIMPLE),
+ wxT("can't popup/dismiss the list for simple combo box") );
+
+ // we *must* set focus to the combobox before showing or hiding the drop
+ // down as without this we get WM_LBUTTONDOWN messages with invalid HWND
+ // when hiding it (whether programmatically or manually) resulting in a
+ // crash when we pass them to IsDialogMessage()
+ //
+ // this can be seen in the combo page of the widgets sample under Windows 7
+ SetFocus();
+
+ ::SendMessage(GetHwnd(), CB_SHOWDROPDOWN, show, 0);
}
-wxString wxChoice::GetStringSelection (void) const
+bool wxChoice::Show(bool show)
{
- int sel = GetSelection ();
- if (sel > -1)
- return wxString(this->GetString (sel));
- else
- return wxString(_T(""));
+ if ( !wxChoiceBase::Show(show) )
+ return false;
+
+ // When hiding the combobox, we also need to hide its popup part as it
+ // doesn't happen automatically.
+ if ( !show && ::SendMessage(GetHwnd(), CB_GETDROPPEDSTATE, 0, 0) )
+ MSWDoPopupOrDismiss(false);
+
+ return true;
}
-bool wxChoice::SetStringSelection (const wxString& s)
+// ----------------------------------------------------------------------------
+// MSW message handlers
+// ----------------------------------------------------------------------------
+
+WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
- int sel = FindString (s);
- if (sel > -1)
+ switch ( nMsg )
{
- SetSelection (sel);
- return TRUE;
+ 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
+ }
}
- else
- return FALSE;
+
+ return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
}
-void wxChoice::Command(wxCommandEvent & event)
+bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
- SetSelection (event.GetInt());
- ProcessCommand (event);
+ /*
+ 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). Here are the different cases:
+
+ 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.
+
+ Additionally, notice that CBN_SELENDCANCEL doesn't seem to actually
+ cancel anything, if we get CBN_SELCHANGE before it, as it happens in
+ the case (B), the selection is still accepted. This doesn't make much
+ sense and directly contradicts MSDN documentation but is how the native
+ comboboxes behave and so we do the same thing.
+ */
+ switch ( param )
+ {
+ 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 ( m_pendingSelection != wxID_NONE )
+ {
+ // This can only happen in the case (B), so set the item
+ // selected in the drop down as our real selection.
+ SendSelectionChangedEvent(wxEVT_CHOICE);
+ m_pendingSelection = wxID_NONE;
+ }
+ break;
+
+ case CBN_SELENDOK:
+ // Reset the variables to prevent CBN_CLOSEUP from doing anything,
+ // it's not needed if we do get CBN_SELENDOK.
+ m_lastAcceptedSelection =
+ m_pendingSelection = wxID_NONE;
+
+ SendSelectionChangedEvent(wxEVT_CHOICE);
+ break;
+
+ case CBN_SELCHANGE:
+ // If we get this event after CBN_SELENDOK, i.e. cases (A) or (C)
+ // above, we don't have anything to do. But in the case (B) we need
+ // to remember that the selection should really change once the
+ // drop down is closed.
+ if ( m_lastAcceptedSelection != wxID_NONE )
+ m_pendingSelection = GetCurrentSelection();
+ break;
+
+ case CBN_SELENDCANCEL:
+ // Do not reset m_pendingSelection here -- it would make sense but,
+ // as described above, native controls keep the selection even when
+ // closing the drop down by pressing Escape or TAB, so conform to
+ // their behaviour.
+ m_lastAcceptedSelection = wxID_NONE;
+ break;
+
+ default:
+ return false;
+ }
+
+ return true;
}
+WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
+{
+ if ( !IsThisEnabled() )
+ return MSWControlColorDisabled(hDC);
+ return wxChoiceBase::MSWControlColor(hDC, hWnd);
+}
+#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)
projects / wxWidgets.git / blobdiff