C++ GetActiveChild函数代码示例

//---------------------------------------------------------
void CSAGA_Frame::On_Frame_Close_All(wxCommandEvent &WXUNUSED(event))
{
	while( GetActiveChild() != NULL )
	{
		delete(GetActiveChild());
	}
}

//---------------------------------------------------------
void CSAGA_Frame::On_Frame_Close(wxCommandEvent &WXUNUSED(event))
{
	if( GetActiveChild() != NULL )
	{
		GetActiveChild()->Close();
	}
}

// Make sure the correct toolbars are showing for the active view
void csFrame::OnIdle(wxIdleEvent& event)
{
    wxSashLayoutWindow* paletteWin = wxGetApp().GetDiagramPaletteSashWindow();
    wxSashLayoutWindow* diagramToolBarWin = wxGetApp().GetDiagramToolBarSashWindow();
    if (!paletteWin || !diagramToolBarWin)
        return;
    bool doLayout = false;
    if (GetActiveChild())
    {
        if (!paletteWin->IsShown() || !diagramToolBarWin->IsShown())
        {
            paletteWin->Show(true);
            diagramToolBarWin->Show(true);

            doLayout = true;
        }
    }
    else
    {
        if (paletteWin->IsShown() || diagramToolBarWin->IsShown())
        {
            paletteWin->Show(false);
            diagramToolBarWin->Show(false);
            doLayout = true;
        }
    }
    if (doLayout)
    {
        wxLayoutAlgorithm layout;
        layout.LayoutMDIFrame(this);

#if defined(__WXMSW__)
        // Need to do something else to get it to refresh properly
        // when a client frame is first displayed; moving the client
        // window doesn't cause the proper refresh. Just refreshing the
        // client doesn't work (presumably because it's clipping the
        // children).
        // FIXED in wxWidgets, by intercepting wxMDIClientWindow::DoSetSize
        // and checking if the position has changed, before redrawing the
        // child windows.
#if 0
        wxMDIChildFrame* childFrame = GetActiveChild();
        if (childFrame)
        {
            HWND hWnd = (HWND) childFrame->GetHWND();
            ::RedrawWindow(hWnd, NULL, NULL, RDW_FRAME|RDW_ALLCHILDREN|RDW_INVALIDATE );

        }
#endif
#endif // __WXMSW__
    }
    event.Skip();
}

wxMenuItem *wxMDIParentFrame::FindItemInMenuBar(int menuId) const
{
    wxMenuItem *item = wxFrame::FindItemInMenuBar(menuId);
    if ( !item && GetActiveChild() )
    {
        item = GetActiveChild()->FindItemInMenuBar(menuId);
    }

    if ( !item && m_windowMenu )
        item = m_windowMenu->FindItem(menuId);

    return item;
}

void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
{
    wxMDIChildFrame *child = GetActiveChild();
    if ( child )
    {
        wxEvtHandler* source = child->GetEventHandler();
        wxMenuBar* bar = child->GetMenuBar();

        if (menu)
        {
            menu->UpdateUI(source);
        }
        else
        {
            if ( bar != NULL )
            {
                int nCount = bar->GetMenuCount();
                for (int n = 0; n < nCount; n++)
                    bar->GetMenu(n)->UpdateUI(source);
            }
        }
    }
    else
    {
        wxFrameBase::DoMenuUpdates(menu);
    }
}

wxMenuItem *wxMDIParentFrame::FindItemInMenuBar(int menuId) const
{
    // We must look in the child menu first: if it has an item with the same ID
    // as in our own menu bar, the child item should be used to determine
    // whether it's currently enabled.
    wxMenuItem *item = GetActiveChild()
                            ? GetActiveChild()->FindItemInMenuBar(menuId)
                            : NULL;
    if ( !item )
        item = wxFrame::FindItemInMenuBar(menuId);

    if ( !item && m_windowMenu )
        item = m_windowMenu->FindItem(menuId);

    return item;
}

void CSAGA_Frame::On_Command_Child_UI(wxUpdateUIEvent &event)
{
	CVIEW_Base	*pChild;

	if( (pChild = wxDynamicCast(GetActiveChild(), CVIEW_Base)) != NULL )
	{
		pChild->On_Command_UI(event);
	}
}

//---------------------------------------------------------
void CSAGA_Frame::On_Command_Child(wxCommandEvent &event)
{
	wxMDIChildFrame	*pChild;

	if( (pChild = GetActiveChild()) != NULL )
	{
		pChild->GetEventHandler()->AddPendingEvent(event);
	}
}

// Default menu selection behaviour - display a help string
void wxMDIParentFrame::OnMenuHighlight(wxMenuEvent& event)
{
    if (GetStatusBar())
    {
        if (event.GetMenuId() == -1)
            SetStatusText("");
        else
        {
            wxMenuBar *menuBar = (wxMenuBar*) NULL;
            if (GetActiveChild())
                menuBar = GetActiveChild()->GetMenuBar();
            else
                menuBar = GetMenuBar();
            if (menuBar)
            {
                wxString helpString(menuBar->GetHelpString(event.GetMenuId()));
                if (helpString != "")
                    SetStatusText(helpString);
            }
        }
    }
}

void wxMDIParentFrame::InternalSetMenuBar()
{
    if ( GetActiveChild() )
    {
        AddWindowMenu();
    }
    else // we don't have any MDI children yet
    {
        // wait until we do to add the window menu but do set the main menu for
        // now (this is done by AddWindowMenu() as a side effect)
        MDISetMenu(GetClientWindow(), (HMENU)m_hMenu, NULL);
    }
}

bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
{
    bool processed = false;

    if ( wxWindow::HandleActivate(state, minimized, activate) )
    {
        // already processed
        processed = true;
    }

    // If this window is an MDI parent, we must also send an OnActivate message
    // to the current child.
    if ( GetActiveChild() &&
         ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
    {
        wxActivateEvent event(wxEVT_ACTIVATE, true, GetActiveChild()->GetId());
        event.SetEventObject( GetActiveChild() );
        if ( GetActiveChild()->HandleWindowEvent(event) )
            processed = true;
    }

    return processed;
}

void wxMDIParentFrame::GtkOnSize( int x, int y, int width, int height )
{
    wxFrame::GtkOnSize( x, y, width, height );

    wxMDIChildFrame *child_frame = GetActiveChild();
    if (!child_frame) return;

    wxMenuBar *menu_bar = child_frame->m_menuBar;
    if (!menu_bar) return;
    if (!menu_bar->m_widget) return;

    menu_bar->m_x = 0;
    menu_bar->m_y = 0;
    menu_bar->m_width = m_width;
    menu_bar->m_height = wxMENU_HEIGHT;
    gtk_pizza_set_size( GTK_PIZZA(m_mainWidget),
                          menu_bar->m_widget,
                          0, 0, m_width, wxMENU_HEIGHT );
}

void wxMDIParentFrame::DoGetClientSize(int* width, int* height) const
{
    wxFrame::DoGetClientSize(width, height);

    if (height)
    {
        wxMDIChildFrame* active_child_frame = GetActiveChild();
        if (active_child_frame)
        {
            wxMenuBar* menubar = active_child_frame->m_menuBar;
            if (menubar && menubar->IsShown())
            {
                GtkRequisition req;
                gtk_widget_size_request(menubar->m_widget, &req);
                *height -= req.height;
                if (*height < 0) *height = 0;
            }
        }
    }
}

void MyFrame::FileSavePicture (wxCommandEvent & WXUNUSED(event) )
{
#if wxUSE_FILEDLG
    MyChild * pChild = (MyChild *)GetActiveChild();
    if (pChild == NULL)
    {
        return;
    }

    wxFileDialog dialog(this, wxT("Save Picture as"), wxEmptyString, pChild->GetTitle(),
        wxT("SVG vector picture files (*.svg)|*.svg"),
        wxFD_SAVE|wxFD_OVERWRITE_PROMPT);

    if (dialog.ShowModal() == wxID_OK)
    {
        if (!pChild->OnSave ( dialog.GetPath() ))
        {
            return;
        }
    }
    return;
#endif // wxUSE_FILEDLG
}

void CSAGA_Frame::On_Frame_Previous_UI(wxUpdateUIEvent &event)
{
	event.Enable(GetActiveChild() != NULL);
}