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Diffstat (limited to 'src/screen_switcher.h')
| -rw-r--r-- | src/screen_switcher.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/screen_switcher.h b/src/screen_switcher.h new file mode 100644 index 00000000..6e7c5e89 --- /dev/null +++ b/src/screen_switcher.h @@ -0,0 +1,60 @@ +/*************************************************************************** + * Copyright (C) 2008-2012 by Andrzej Rybczak * + * electricityispower@gmail.com * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * + ***************************************************************************/ + +#ifndef _SCREEN_SWITCHER_H +#define _SCREEN_SWITCHER_H + +#include "global.h" + +class SwitchTo +{ + template <bool ToBeExecuted, typename ScreenT> struct TabbableAction_ { + static void execute(ScreenT *) { } + }; + template <typename ScreenT> struct TabbableAction_<true, ScreenT> { + static void execute(ScreenT *screen) { + using Global::myScreen; + // it has to work only if both current and previous screens are Tabbable + if (dynamic_cast<Tabbable *>(myScreen)) + screen->setPreviousScreen(myScreen); + } + }; + +public: + template <typename ScreenT> + static void execute(ScreenT *screen) + { + using Global::myScreen; + using Global::myLockedScreen; + + const bool isScreenMergable = screen->isMergable() && myLockedScreen; + const bool isScreenTabbable = std::is_base_of<Tabbable, ScreenT>::value; + + assert(myScreen != screen); + if (isScreenMergable) + updateInactiveScreen(screen); + if (screen->hasToBeResized || isScreenMergable) + screen->resize(); + TabbableAction_<isScreenTabbable, ScreenT>::execute(screen); + myScreen = screen; + } +}; + +#endif // _SCREEN_SWITCHER_H |