simplify code to return from the end of the function

[wxWidgets.git] / src / msw / choice.cpp

diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index 6910839ffb573a048f973c3f680f6d1ea9b7f361..e7c17023c1c48bf52a43ffbc02ca669de32bebd3 100644 (file)
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -30,70 +30,15 @@
 
 #ifndef WX_PRECOMP
     #include "wx/utils.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/log.h"
     #include "wx/brush.h"
     #include "wx/settings.h"
 #endif
 

-#include "wx/msw/private.h"
+#include "wx/dynlib.h"

 
 

-#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
-*/
+#include "wx/msw/private.h"

 
 // ============================================================================
 // implementation
 
 // ============================================================================
 // implementation


@@ -142,15 +87,8 @@ bool wxChoice::CreateAndInit(wxWindow *parent,
         return false;
 
 
         return false;
 
 

-    // 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
     // initialize the controls contents

-    for ( int i = 0; i < n; i++ )
-    {
-        Append(choices[i]);
-    }
+    Append(n, choices);

 
     // and now we may finally size the control properly (if needed)
     SetInitialSize(size);
 
     // and now we may finally size the control properly (if needed)
     SetInitialSize(size);


@@ -224,11 +162,66 @@ WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
     return msStyle;
 }
 
     return msStyle;
 }
 

+#ifndef EP_EDITTEXT
+    #define EP_EDITTEXT         1
+    #define ETS_NORMAL          1
+#endif
+
+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;
+
+    attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+
+    // 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);
+
+    // 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 attrs;
+}
+

 wxChoice::~wxChoice()
 {
     Clear();
 }
 
 wxChoice::~wxChoice()
 {
     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
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // adding/deleting items to/from the list
 // ----------------------------------------------------------------------------


@@ -364,7 +357,7 @@ int wxChoice::FindString(const wxString& s, bool bCase) const
    else
    {
        int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
    else
    {
        int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,

-                                  (WPARAM)-1, (LPARAM)s.wx_str());
+                                  (WPARAM)-1, wxMSW_CONV_LPARAM(s));

 
        return pos == LB_ERR ? wxNOT_FOUND : pos;
    }
 
        return pos == LB_ERR ? wxNOT_FOUND : pos;
    }


@@ -386,8 +379,12 @@ void wxChoice::SetString(unsigned int n, const wxString& s)
     else if ( HasClientObjectData() )
         oldObjData = GetClientObject(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_DELETESTRING, n, 0);

-    ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.wx_str() );
+    ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, wxMSW_CONV_LPARAM(s) );

 
     // restore the client data
     if ( oldData )
 
     // restore the client data
     if ( oldData )


@@ -395,6 +392,11 @@ void wxChoice::SetString(unsigned int n, const wxString& s)
     else if ( oldObjData )
         SetClientObject(n, oldObjData);
 
     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();
 }
 
     InvalidateBestSize();
 }
 


@@ -436,7 +438,7 @@ void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)
 void* wxChoice::DoGetItemClientData(unsigned int n) const
 {
     LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
 void* wxChoice::DoGetItemClientData(unsigned int n) const
 {
     LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);

-    if ( rc == CB_ERR )
+    if ( rc == CB_ERR && GetLastError() != ERROR_SUCCESS )

     {
         wxLogLastError(wxT("CB_GETITEMDATA"));
 
     {
         wxLogLastError(wxT("CB_GETITEMDATA"));
 


@@ -523,8 +525,21 @@ void wxChoice::DoSetSize(int x, int y,
                          int width, int height,
                          int sizeFlags)
 {
                          int width, int height,
                          int sizeFlags)
 {

+    const int heightBest = GetBestSize().y;
+

     // we need the real height below so get the current one if it's not given
     // we need the real height below so get the current one if it's not given

-    if ( height != wxDefaultCoord && height != GetBestSize().y )
+    if ( height == wxDefaultCoord )
+    {
+        // 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
     {
         // 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


@@ -538,10 +553,6 @@ void wxChoice::DoSetSize(int x, int y,
         else if ( m_heightOwn < COMBO_HEIGHT_ADJ )
             m_heightOwn = COMBO_HEIGHT_ADJ;
     }
         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 height which we must pass to Windows should be the total height of


@@ -563,7 +574,10 @@ void wxChoice::DoSetSize(int x, int y,
     const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
     int heightWithItems = 0;
     if (!HasFlag(wxCB_SIMPLE))
     const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
     int heightWithItems = 0;
     if (!HasFlag(wxCB_SIMPLE))

-        heightWithItems = height + hItem*nItems;
+        // 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);
 
     else
         heightWithItems = SetHeightSimpleComboBox(nItems);
 


@@ -575,7 +589,7 @@ void wxChoice::DoSetSize(int x, int y,
     // 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
     // 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
+    // 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 )
     // will be done from MSWEndDeferWindowPos()
 #if wxUSE_DEFERRED_SIZING
     if ( m_pendingSize == wxDefaultSize )


@@ -597,43 +611,85 @@ void wxChoice::DoSetSize(int x, int y,
 
 wxSize wxChoice::DoGetBestSize() const
 {
 
 wxSize wxChoice::DoGetBestSize() const
 {

-    // find the widest string
-    int wChoice = 0;
-    int hChoice;
-    const unsigned int nItems = GetCount();
-    for ( unsigned int i = 0; i < nItems; i++ )
-    {
-        int wLine;
-        GetTextExtent(GetString(i), &wLine, NULL);
-        if ( wLine > wChoice )
-            wChoice = wLine;
-    }
+    // The base version returns the size of the largest string
+    return GetSizeFromTextSize(wxChoiceBase::DoGetBestSize().x);
+}

 
 

-    // give it some reasonable default value if there are no strings in the
-    // list
-    if ( wChoice == 0 )
-        wChoice = 100;
+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;
+}

 
 

-    // the combobox should be slightly larger than the widest string
-    wChoice += 5*GetCharWidth();
-    if( HasFlag( wxCB_SIMPLE ) )
+wxSize wxChoice::DoGetSizeFromTextSize(int xlen, int ylen) const
+{
+    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) )
+    {
+        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

     {
     {

-        hChoice = SetHeightSimpleComboBox( nItems );
+        tsize.x += 4*cHeight;

     }
     }

+
+    // set height on our own
+    if( HasFlag( wxCB_SIMPLE ) )
+        tsize.y = SetHeightSimpleComboBox(GetCount());

     else
     else

-        hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight());
+        tsize.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cHeight);
+
+    // Perhaps the user wants something different from CharHeight
+    if ( ylen > 0 )
+        tsize.IncBy(0, ylen - cHeight);

 
 

-    wxSize best(wChoice, hChoice);
-    CacheBestSize(best);
-    return best;
+    return tsize;

 }
 
 }
 

-int wxChoice::SetHeightSimpleComboBox(int nItems) const
+// ----------------------------------------------------------------------------
+// Popup operations
+// ----------------------------------------------------------------------------
+
+void wxChoice::MSWDoPopupOrDismiss(bool show)

 {
 {

-    int cx, cy;
-    wxGetCharSize( GetHWND(), &cx, &cy, GetFont() );
-    int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, -1, 0);
-    return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1;
+    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);
+}
+
+bool wxChoice::Show(bool show)
+{
+    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;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -768,7 +824,7 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 
 WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
 {
 
 WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
 {

-    if ( !IsEnabled() )
+    if ( !IsThisEnabled() )

         return MSWControlColorDisabled(hDC);
 
     return wxChoiceBase::MSWControlColor(hDC, hWnd);
         return MSWControlColorDisabled(hDC);
 
     return wxChoiceBase::MSWControlColor(hDC, hWnd);