Rewind the input stream after failing to load image from it.

[wxWidgets.git] / src / common / framecmn.cpp

diff --git a/src/common/framecmn.cpp b/src/common/framecmn.cpp
index f8d43448d541058489a7f1931afd71fbe377e169..e888407f92000cefd925cc1efc788ef339dce82a 100644 (file)
--- a/src/common/framecmn.cpp
+++ b/src/common/framecmn.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        common/framecmn.cpp
+// Name:        src/common/framecmn.cpp

 // Purpose:     common (for all platforms) wxFrame functions
 // Author:      Julian Smart, Vadim Zeitlin
 // Created:     01/02/97
 // Purpose:     common (for all platforms) wxFrame functions
 // Author:      Julian Smart, Vadim Zeitlin
 // Created:     01/02/97


@@ -23,19 +23,15 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

+#include "wx/frame.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-    #include "wx/frame.h"

     #include "wx/menu.h"
     #include "wx/menuitem.h"
     #include "wx/dcclient.h"
     #include "wx/menu.h"
     #include "wx/menuitem.h"
     #include "wx/dcclient.h"

-#endif // WX_PRECOMP
-
-#if wxUSE_TOOLBAR

     #include "wx/toolbar.h"
     #include "wx/toolbar.h"

-#endif
-#if wxUSE_STATUSBAR

     #include "wx/statusbr.h"
     #include "wx/statusbr.h"

-#endif
+#endif // WX_PRECOMP

 
 // ----------------------------------------------------------------------------
 // event table
 
 // ----------------------------------------------------------------------------
 // event table


@@ -96,27 +92,15 @@ wxFrame *wxFrameBase::New(wxWindow *parent,
 void wxFrameBase::DeleteAllBars()
 {
 #if wxUSE_MENUS
 void wxFrameBase::DeleteAllBars()
 {
 #if wxUSE_MENUS

-    if ( m_frameMenuBar )
-    {
-        delete m_frameMenuBar;
-        m_frameMenuBar = (wxMenuBar *) NULL;
-    }
+    wxDELETE(m_frameMenuBar);

 #endif // wxUSE_MENUS
 
 #if wxUSE_STATUSBAR
 #endif // wxUSE_MENUS
 
 #if wxUSE_STATUSBAR

-    if ( m_frameStatusBar )
-    {
-        delete m_frameStatusBar;
-        m_frameStatusBar = (wxStatusBar *) NULL;
-    }
+    wxDELETE(m_frameStatusBar);

 #endif // wxUSE_STATUSBAR
 
 #if wxUSE_TOOLBAR
 #endif // wxUSE_STATUSBAR
 
 #if wxUSE_TOOLBAR

-    if ( m_frameToolBar )
-    {
-        delete m_frameToolBar;
-        m_frameToolBar = (wxToolBar *) NULL;
-    }
+    wxDELETE(m_frameToolBar);

 #endif // wxUSE_TOOLBAR
 }
 
 #endif // wxUSE_TOOLBAR
 }
 


@@ -137,6 +121,8 @@ bool wxFrameBase::IsOneOfBars(const wxWindow *win) const
         return true;
 #endif // wxUSE_TOOLBAR
 
         return true;
 #endif // wxUSE_TOOLBAR
 

+    wxUnusedVar(win);
+

     return false;
 }
 
     return false;
 }
 


@@ -172,54 +158,49 @@ wxPoint wxFrameBase::GetClientAreaOrigin() const
     return pt;
 }
 
     return pt;
 }
 

-
-void wxFrameBase::SendSizeEvent()
-{
-    wxSizeEvent event( GetSize(), GetId() );
-    event.SetEventObject( this );
-    GetEventHandler()->AddPendingEvent( event );
-}
-
-

 // ----------------------------------------------------------------------------
 // misc
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // misc
 // ----------------------------------------------------------------------------
 

+#if wxUSE_MENUS
+

 bool wxFrameBase::ProcessCommand(int id)
 {
 bool wxFrameBase::ProcessCommand(int id)
 {

-#if wxUSE_MENUS

     wxMenuBar *bar = GetMenuBar();
     if ( !bar )
         return false;
 
     wxMenuBar *bar = GetMenuBar();
     if ( !bar )
         return false;
 

-    wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, id);
+    wxMenuItem *item = bar->FindItem(id);
+    if ( !item )
+        return false;
+
+    return ProcessCommand(item);
+}
+
+bool wxFrameBase::ProcessCommand(wxMenuItem *item)
+{
+    wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, item->GetId());

     commandEvent.SetEventObject(this);
 
     commandEvent.SetEventObject(this);
 

-    wxMenuItem *item = bar->FindItem(id);
-    if (item)
-    {
-        if (!item->IsEnabled())
-            return true;
+    if (!item->IsEnabled())
+        return true;

 
 

-        if ((item->GetKind() == wxITEM_RADIO) && item->IsChecked() )
-            return true;
+    if ((item->GetKind() == wxITEM_RADIO) && item->IsChecked() )
+        return true;

 
 

-        if (item->IsCheckable())
-        {
-            item->Toggle();
+    if (item->IsCheckable())
+    {
+        item->Toggle();

 
 

-            // use the new value
-            commandEvent.SetInt(item->IsChecked());
-        }
+        // use the new value
+        commandEvent.SetInt(item->IsChecked());

     }
 
     }
 

-    GetEventHandler()->ProcessEvent(commandEvent);
-    return true;
-#else // !wxUSE_MENUS
-    return false;
-#endif // wxUSE_MENUS/!wxUSE_MENUS
+    return HandleWindowEvent(commandEvent);

 }
 
 }
 

+#endif // wxUSE_MENUS
+

 // Do the UI update processing for this window. This is
 // provided for the application to call if it wants to
 // force a UI update, particularly for the menus and toolbar.
 // Do the UI update processing for this window. This is
 // provided for the application to call if it wants to
 // force a UI update, particularly for the menus and toolbar.


@@ -235,14 +216,12 @@ void wxFrameBase::UpdateWindowUI(long flags)
 #if wxUSE_MENUS
     if (GetMenuBar())
     {
 #if wxUSE_MENUS
     if (GetMenuBar())
     {

-        if ((flags & wxUPDATE_UI_FROMIDLE) && !wxUSE_IDLEMENUUPDATES)
-        {
-            // If coming from an idle event, we only
-            // want to update the menus if we're
-            // in the wxUSE_IDLEMENUUPDATES configuration:
-            // so if we're not, do nothing
-        }
-        else
+        // If coming from an idle event, we only want to update the menus if
+        // we're in the wxUSE_IDLEMENUUPDATES configuration, otherwise they
+        // will be update when the menu is opened later
+#if !wxUSE_IDLEMENUUPDATES
+        if ( !(flags & wxUPDATE_UI_FROMIDLE) )
+#endif // wxUSE_IDLEMENUUPDATES

             DoMenuUpdates();
     }
 #endif // wxUSE_MENUS
             DoMenuUpdates();
     }
 #endif // wxUSE_MENUS


@@ -257,35 +236,23 @@ void wxFrameBase::UpdateWindowUI(long flags)
 void wxFrameBase::OnMenuHighlight(wxMenuEvent& event)
 {
 #if wxUSE_STATUSBAR
 void wxFrameBase::OnMenuHighlight(wxMenuEvent& event)
 {
 #if wxUSE_STATUSBAR

-    (void)ShowMenuHelp(GetStatusBar(), event.GetMenuId());
+    (void)ShowMenuHelp(event.GetMenuId());

 #endif // wxUSE_STATUSBAR
 }
 
 #endif // wxUSE_STATUSBAR
 }
 

-#if !wxUSE_IDLEMENUUPDATES

 void wxFrameBase::OnMenuOpen(wxMenuEvent& event)
 void wxFrameBase::OnMenuOpen(wxMenuEvent& event)

-#else
-void wxFrameBase::OnMenuOpen(wxMenuEvent& WXUNUSED(event))
-#endif

 {
 {

-#if !wxUSE_IDLEMENUUPDATES
+#if wxUSE_IDLEMENUUPDATES
+    wxUnusedVar(event);
+#else // !wxUSE_IDLEMENUUPDATES
+    // as we didn't update the menus from idle time, do it now

     DoMenuUpdates(event.GetMenu());
     DoMenuUpdates(event.GetMenu());

-#endif // !wxUSE_IDLEMENUUPDATES
+#endif // wxUSE_IDLEMENUUPDATES/!wxUSE_IDLEMENUUPDATES

 }
 
 void wxFrameBase::OnMenuClose(wxMenuEvent& WXUNUSED(event))
 {
 }
 
 void wxFrameBase::OnMenuClose(wxMenuEvent& WXUNUSED(event))
 {

-    // do we have real status text to restore?
-    if ( !m_oldStatusText.empty() )
-    {
-        if ( m_statusBarPane >= 0 )
-        {
-            wxStatusBar *statbar = GetStatusBar();
-            if ( statbar )
-                statbar->SetStatusText(m_oldStatusText, m_statusBarPane);
-        }
-
-        m_oldStatusText.clear();
-    }
+    DoGiveHelp(wxEmptyString, false);

 }
 
 #endif // wxUSE_MENUS && wxUSE_STATUSBAR
 }
 
 #endif // wxUSE_MENUS && wxUSE_STATUSBAR


@@ -314,7 +281,7 @@ wxStatusBar* wxFrameBase::CreateStatusBar(int number,
 {
     // the main status bar can only be created once (or else it should be
     // deleted before calling CreateStatusBar() again)
 {
     // the main status bar can only be created once (or else it should be
     // deleted before calling CreateStatusBar() again)

-    wxCHECK_MSG( !m_frameStatusBar, (wxStatusBar *)NULL,
+    wxCHECK_MSG( !m_frameStatusBar, NULL,

                  wxT("recreating status bar in wxFrame") );
 
     SetStatusBar(OnCreateStatusBar(number, style, id, name));
                  wxT("recreating status bar in wxFrame") );
 
     SetStatusBar(OnCreateStatusBar(number, style, id, name));


@@ -364,27 +331,24 @@ void wxFrameBase::PopStatusText(int number)
     m_frameStatusBar->PopStatusText(number);
 }
 
     m_frameStatusBar->PopStatusText(number);
 }
 

-bool wxFrameBase::ShowMenuHelp(wxStatusBar *WXUNUSED(statbar), int menuId)
+bool wxFrameBase::ShowMenuHelp(int menuId)

 {
 #if wxUSE_MENUS
     // if no help string found, we will clear the status bar text
 {
 #if wxUSE_MENUS
     // if no help string found, we will clear the status bar text

+    //
+    // NB: wxID_NONE is used for (sub)menus themselves by wxMSW

     wxString helpString;
     wxString helpString;

-    bool show = menuId != wxID_SEPARATOR && menuId != -2 /* wxID_TITLE */;
-
-    if ( show )
+    if ( menuId != wxID_SEPARATOR && menuId != wxID_NONE )

     {
     {

-        wxMenuBar *menuBar = GetMenuBar();
-        if ( menuBar )
-        {
-            // it's ok if we don't find the item because it might belong
-            // to the popup menu
-            wxMenuItem *item = menuBar->FindItem(menuId);
-            if ( item )
-                helpString = item->GetHelp();
-        }
+        const wxMenuItem * const item = FindItemInMenuBar(menuId);
+        if ( item && !item->IsSeparator() )
+            helpString = item->GetHelp();
+
+        // notice that it's ok if we don't find the item because it might
+        // belong to the popup menu, so don't assert here

     }
 
     }
 

-    DoGiveHelp(helpString, show);
+    DoGiveHelp(helpString, true);

 
     return !helpString.empty();
 #else // !wxUSE_MENUS
 
     return !helpString.empty();
 #else // !wxUSE_MENUS


@@ -407,7 +371,8 @@ void wxFrameBase::SetStatusBar(wxStatusBar *statBar)
 
 #endif // wxUSE_STATUSBAR
 
 
 #endif // wxUSE_STATUSBAR
 

-void wxFrameBase::DoGiveHelp(const wxString& text, bool show)
+#if wxUSE_MENUS || wxUSE_TOOLBAR
+void wxFrameBase::DoGiveHelp(const wxString& help, bool show)

 {
 #if wxUSE_STATUSBAR
     if ( m_statusBarPane < 0 )
 {
 #if wxUSE_STATUSBAR
     if ( m_statusBarPane < 0 )


@@ -420,36 +385,60 @@ void wxFrameBase::DoGiveHelp(const wxString& text, bool show)
     if ( !statbar )
         return;
 
     if ( !statbar )
         return;
 

-    wxString help;
+    wxString text;

     if ( show )
     if ( show )

-        help = text;
-
-    // remember the old status bar text if this is the first time we're called
-    // since the menu has been opened as we're going to overwrite it in our
-    // DoGiveHelp() and we want to restore it when the menu is closed
-    //
-    // note that it would be logical to do this in OnMenuOpen() but under MSW
-    // we get an EVT_MENU_HIGHLIGHT before EVT_MENU_OPEN, strangely enough, and
-    // so this doesn't work and instead we use the ugly trick with using
-    // special m_oldStatusText value as "menu opened" (but it is arguably
-    // better than adding yet another member variable to wxFrame on all
-    // platforms)
-    if ( m_oldStatusText.empty() )

     {
     {

-        m_oldStatusText = statbar->GetStatusText(m_statusBarPane);
+        // remember the old status bar text if this is the first time we're
+        // called since the menu has been opened as we're going to overwrite it
+        // in our DoGiveHelp() and we want to restore it when the menu is
+        // closed
+        //
+        // note that it would be logical to do this in OnMenuOpen() but under
+        // MSW we get an EVT_MENU_HIGHLIGHT before EVT_MENU_OPEN, strangely
+        // enough, and so this doesn't work and instead we use the ugly trick
+        // with using special m_oldStatusText value as "menu opened" (but it is
+        // arguably better than adding yet another member variable to wxFrame
+        // on all platforms)

         if ( m_oldStatusText.empty() )
         {
         if ( m_oldStatusText.empty() )
         {

-            // use special value to prevent us from doing this the next time
-            m_oldStatusText += _T('\0');
+            m_oldStatusText = statbar->GetStatusText(m_statusBarPane);
+            if ( m_oldStatusText.empty() )
+            {
+                // use special value to prevent us from doing this the next time
+                m_oldStatusText += wxT('\0');
+            }
+        }
+
+        m_lastHelpShown =
+        text = help;
+    }
+    else // hide help, restore the original text
+    {
+        // clear the last shown help string but remember its value
+        wxString lastHelpShown;
+        lastHelpShown.swap(m_lastHelpShown);
+
+        // also clear the old status text but remember it too to restore it
+        // below
+        text.swap(m_oldStatusText);
+
+        if ( statbar->GetStatusText(m_statusBarPane) != lastHelpShown )
+        {
+            // if the text was changed with an explicit SetStatusText() call
+            // from the user code in the meanwhile, do not overwrite it with
+            // the old status bar contents -- this is almost certainly not what
+            // the user expects and would be very hard to avoid from user code
+            return;

         }
     }
 
         }
     }
 

-    statbar->SetStatusText(help, m_statusBarPane);
+    statbar->SetStatusText(text, m_statusBarPane);

 #else
 #else

-    wxUnusedVar(text);
+    wxUnusedVar(help);

     wxUnusedVar(show);
 #endif // wxUSE_STATUSBAR
 }
     wxUnusedVar(show);
 #endif // wxUSE_STATUSBAR
 }

+#endif // wxUSE_MENUS || wxUSE_TOOLBAR

 
 
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------


@@ -462,9 +451,9 @@ wxToolBar* wxFrameBase::CreateToolBar(long style,
                                       wxWindowID id,
                                       const wxString& name)
 {
                                       wxWindowID id,
                                       const wxString& name)
 {

-    // the main toolbar can't be recreated (unless it was explicitly deeleted
+    // the main toolbar can't be recreated (unless it was explicitly deleted

     // before)
     // before)

-    wxCHECK_MSG( !m_frameToolBar, (wxToolBar *)NULL,
+    wxCHECK_MSG( !m_frameToolBar, NULL,

                  wxT("recreating toolbar in wxFrame") );
 
     if ( style == -1 )
                  wxT("recreating toolbar in wxFrame") );
 
     if ( style == -1 )


@@ -501,15 +490,40 @@ wxToolBar* wxFrameBase::OnCreateToolBar(long style,
 
 void wxFrameBase::SetToolBar(wxToolBar *toolbar)
 {
 
 void wxFrameBase::SetToolBar(wxToolBar *toolbar)
 {

-    bool hadBar = m_frameToolBar != NULL;
-    m_frameToolBar = toolbar;
-
-    if ( (m_frameToolBar != NULL) != hadBar )
+    if ( (toolbar != NULL) != (m_frameToolBar != NULL) )

     {
     {

-        PositionToolBar();
+        // the toolbar visibility must have changed so we need to both position
+        // the toolbar itself (if it appeared) and to relayout the frame
+        // contents in any case
+
+        if ( toolbar )
+        {
+            // we need to assign it to m_frameToolBar for PositionToolBar() to
+            // do anything
+            m_frameToolBar = toolbar;
+            PositionToolBar();
+        }
+        //else: tricky: do not reset m_frameToolBar yet as otherwise DoLayout()
+        //      wouldn't recognize the (still existing) toolbar as one of our
+        //      bars and wouldn't layout the single child of the frame correctly
+
+
+        // and this is even more tricky: we want DoLayout() to recognize the
+        // old toolbar for the purpose of not counting it among our non-bar
+        // children but we don't want to reserve any more space for it so we
+        // temporarily hide it
+        if ( m_frameToolBar )
+            m_frameToolBar->Hide();

 
         DoLayout();
 
         DoLayout();

+
+        if ( m_frameToolBar )
+            m_frameToolBar->Show();

     }
     }

+
+    // this might have been already done above but it's simpler to just always
+    // do it unconditionally instead of testing for whether we already did it
+    m_frameToolBar = toolbar;

 }
 
 #endif // wxUSE_TOOLBAR
 }
 
 #endif // wxUSE_TOOLBAR


@@ -523,16 +537,16 @@ void wxFrameBase::SetToolBar(wxToolBar *toolbar)
 // update all menus
 void wxFrameBase::DoMenuUpdates(wxMenu* menu)
 {
 // update all menus
 void wxFrameBase::DoMenuUpdates(wxMenu* menu)
 {

-    wxEvtHandler* source = GetEventHandler();
-    wxMenuBar* bar = GetMenuBar();
-

     if (menu)
     if (menu)

+    {
+        wxEvtHandler* source = GetEventHandler();

         menu->UpdateUI(source);
         menu->UpdateUI(source);

-    else if ( bar != NULL )
+    }
+    else

     {
     {

-        int nCount = bar->GetMenuCount();
-        for (int n = 0; n < nCount; n++)
-            bar->GetMenu(n)->UpdateUI(source);
+        wxMenuBar* bar = GetMenuBar();
+        if (bar != NULL)
+            bar->UpdateMenus();

     }
 }
 
     }
 }
 


@@ -567,13 +581,11 @@ void wxFrameBase::SetMenuBar(wxMenuBar *menubar)
     this->AttachMenuBar(menubar);
 }
 
     this->AttachMenuBar(menubar);
 }
 

-#endif // wxUSE_MENUS
-
-#if WXWIN_COMPATIBILITY_2_2
-
-bool wxFrameBase::Command(int winid)
+wxMenuItem *wxFrameBase::FindItemInMenuBar(int menuId) const

 {
 {

-    return ProcessCommand(winid);
+    const wxMenuBar * const menuBar = GetMenuBar();
+
+    return menuBar ? menuBar->FindItem(menuId) : NULL;

 }
 
 }
 

-#endif // WXWIN_COMPATIBILITY_2_2
+#endif // wxUSE_MENUS