// Name: 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
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
-#pragma implementation "choice.h"
+ #pragma implementation "choice.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
+#if wxUSE_CHOICE
+
#ifndef WX_PRECOMP
-#include "wx/choice.h"
-#include "wx/utils.h"
-#include "wx/log.h"
+ #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"
-#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
-#endif
-bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
+// ============================================================================
+// 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)
{
- if (param == CBN_SELCHANGE)
- {
- wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
- event.SetInt(GetSelection());
- event.SetEventObject(this);
- event.SetString(GetStringSelection());
- ProcessCommand(event);
+ if ( !CreateControl(parent, id, pos, size, style, validator, name) )
+ return FALSE;
- return TRUE;
- }
- else
- return FALSE;
-}
+ long msStyle = WS_CHILD | CBS_DROPDOWNLIST | WS_TABSTOP | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL /* | WS_CLIPSIBLINGS */;
+ if ( style & wxCB_SORT )
+ msStyle |= CBS_SORT;
+
+ if ( style & wxCLIP_SIBLINGS )
+ msStyle |= WS_CLIPSIBLINGS;
-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.
- }
-#endif
-*/
- // Subclass again for purposes of dialog editing mode
- SubclassWin(m_hWnd);
+ // 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),
+ _T("this style flag is ignored by wxChoice, you ")
+ _T("probably want to use a wxComboBox") );
- SetFont(parent->GetFont());
+ if ( !MSWCreateControl(wxT("COMBOBOX"), msStyle) )
+ return FALSE;
- int i;
- for (i = 0; i < n; i++)
- {
- Append(choices[i]);
- }
- SetSelection(n);
+ // A choice/combobox normally has a white background (or other, depending
+ // on global settings) rather than inheriting the parent's background colour.
+ SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
+
+ for ( int i = 0; i < n; i++ )
+ {
+ Append(choices[i]);
+ }
- SetSize(x, y, width, height);
+ SetSize(pos.x, pos.y, size.x, size.y);
- return TRUE;
+ return TRUE;
}
-void wxChoice::Append(const wxString& item)
+wxChoice::~wxChoice()
{
- SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LONG)(const wxChar *)item);
+ Free();
+}
+
+// ----------------------------------------------------------------------------
+// adding/deleting items to/from the list
+// ----------------------------------------------------------------------------
+
+int wxChoice::DoAppend(const wxString& item)
+{
+ int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LONG)item.c_str());
+ if ( n == CB_ERR )
+ {
+ wxLogLastError(wxT("SendMessage(CB_ADDSTRING)"));
+ }
- m_noStrings ++;
+ return n;
}
void wxChoice::Delete(int n)
{
- m_noStrings = (int)SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+ wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") );
+
+ if ( HasClientObjectData() )
+ {
+ delete GetClientObject(n);
+ }
+
+ SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
}
-void wxChoice::Clear(void)
+void wxChoice::Clear()
{
- SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+ Free();
+
+ SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+}
- m_noStrings = 0;
+void wxChoice::Free()
+{
+ if ( HasClientObjectData() )
+ {
+ size_t count = GetCount();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ delete GetClientObject(n);
+ }
+ }
}
+// ----------------------------------------------------------------------------
+// selection
+// ----------------------------------------------------------------------------
-int wxChoice::GetSelection(void) const
+int wxChoice::GetSelection() const
{
- return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
+ 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
+// ----------------------------------------------------------------------------
+
+int wxChoice::GetCount() const
+{
+ return (int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
}
int wxChoice::FindString(const wxString& s) 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.
+ int count = GetCount();
+ for ( int i = 0; i < count; i++ )
+ {
+ // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too
+ if ( GetString(i).IsSameAs(s, FALSE) )
+ 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;
+#endif // Watcom/!Watcom
+}
+
+void wxChoice::SetString(int n, const wxString& s)
+{
+ wxCHECK_RET( n >= 0 && n < GetCount(),
+ 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
+ void *data;
+ if ( m_clientDataItemsType != wxClientData_None )
+ {
+ data = DoGetItemClientData(n);
+ }
+ else // no client data
+ {
+ data = NULL;
+ }
+
+ ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+ ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.c_str() );
+
+ if ( data )
+ {
+ DoSetItemClientData(n, data);
+ }
+ //else: it's already NULL by default
}
wxString wxChoice::GetString(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 ( ::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();
+ str.UngetWriteBuf();
+ }
return str;
}
+// ----------------------------------------------------------------------------
+// client data
+// ----------------------------------------------------------------------------
+
+void wxChoice::DoSetItemClientData( int n, void* clientData )
+{
+ if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
+ n, (LPARAM)clientData) == CB_ERR )
+ {
+ wxLogLastError(wxT("CB_SETITEMDATA"));
+ }
+}
+
+void* wxChoice::DoGetItemClientData( int n ) const
+{
+ LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
+ if ( rc == CB_ERR )
+ {
+ wxLogLastError(wxT("CB_GETITEMDATA"));
+
+ // unfortunately, there is no way to return an error code to the user
+ rc = (LPARAM) NULL;
+ }
+
+ return (void *)rc;
+}
+
+void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
+{
+ DoSetItemClientData(n, clientData);
+}
+
+wxClientData* wxChoice::DoGetItemClientObject( int n ) const
+{
+ return (wxClientData *)DoGetItemClientData(n);
+}
+
+// ----------------------------------------------------------------------------
+// wxMSW specific helpers
+// ----------------------------------------------------------------------------
+
+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::DoSetSize(int x, int y,
- int width, int height,
+ int width, int WXUNUSED(height),
int sizeFlags)
{
// Ignore height parameter because height doesn't mean 'initially
// 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);
}
-wxSize wxChoice::DoGetBestSize()
+wxSize wxChoice::DoGetBestSize() const
{
// find the widest string
int wLine;
int wChoice = 0;
- for ( int i = 0; i < m_noStrings; i++ )
+ int nItems = GetCount();
+ for ( int i = 0; i < nItems; i++ )
{
wxString str(GetString(i));
GetTextExtent(str, &wLine, NULL);
wChoice += 5*cx;
// Choice drop-down list depends on number of items (limited to 10)
- size_t nStrings = m_noStrings == 0 ? 10 : wxMin(10, m_noStrings) + 1;
+ size_t nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
int hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*nStrings;
return wxSize(wChoice, hChoice);
}
-WXHBRUSH wxChoice::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
- WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
-{
- return 0;
-}
-
long wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
- switch (nMsg)
+ if ( nMsg == WM_LBUTTONUP )
{
-/*
- 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;
- }
+ // 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;
}
- return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
+ return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
}
-wxString wxChoice::GetStringSelection (void) const
+bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
- int sel = GetSelection ();
- if (sel > -1)
- return wxString(this->GetString (sel));
- else
- return wxString(_T(""));
-}
+ if ( param != CBN_SELCHANGE)
+ {
+ // "selection changed" is the only event we're after
+ return FALSE;
+ }
-bool wxChoice::SetStringSelection (const wxString& s)
-{
- int sel = FindString (s);
- if (sel > -1)
+ int n = GetSelection();
+ if (n > -1)
{
- SetSelection (sel);
- return TRUE;
+ 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);
}
- else
- return FALSE;
+
+ return TRUE;
}
-void wxChoice::Command(wxCommandEvent & event)
+WXHBRUSH wxChoice::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
+#if wxUSE_CTL3D
+ WXUINT message,
+ WXWPARAM wParam,
+ WXLPARAM lParam
+#else
+ WXUINT WXUNUSED(message),
+ WXWPARAM WXUNUSED(wParam),
+ WXLPARAM WXUNUSED(lParam)
+#endif
+ )
{
- SetSelection (event.GetInt());
- ProcessCommand (event);
-}
+#if wxUSE_CTL3D
+ if ( m_useCtl3D )
+ {
+ HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
+ return (WXHBRUSH) hbrush;
+ }
+#endif // wxUSE_CTL3D
+
+ HDC hdc = (HDC)pDC;
+ if (GetParent()->GetTransparentBackground())
+ SetBkMode(hdc, TRANSPARENT);
+ else
+ SetBkMode(hdc, OPAQUE);
+
+ wxColour colBack = GetBackgroundColour();
+ if (!IsEnabled())
+ colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
+ ::SetBkColor(hdc, wxColourToRGB(colBack));
+ ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
+
+ wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
+
+ return (WXHBRUSH)brush->GetResourceHandle();
+}
+#endif // wxUSE_CHOICE
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