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60 lines
2.5 KiB
60 lines
2.5 KiB
/*************************************************************************** |
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* Copyright (C) 2008-2016 by Andrzej Rybczak * |
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* electricityispower@gmail.com * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the * |
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* Free Software Foundation, Inc., * |
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * |
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***************************************************************************/ |
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#ifndef NCMPCPP_SCREEN_SWITCHER_H |
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#define NCMPCPP_SCREEN_SWITCHER_H |
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#include "global.h" |
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class SwitchTo |
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{ |
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template <bool ToBeExecuted, typename ScreenT> struct TabbableAction_ { |
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static void execute(ScreenT *) { } |
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}; |
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template <typename ScreenT> struct TabbableAction_<true, ScreenT> { |
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static void execute(ScreenT *screen) { |
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using Global::myScreen; |
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// it has to work only if both current and previous screens are Tabbable |
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if (dynamic_cast<Tabbable *>(myScreen)) |
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screen->setPreviousScreen(myScreen); |
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} |
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}; |
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public: |
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template <typename ScreenT> |
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static void execute(ScreenT *screen) |
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{ |
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using Global::myScreen; |
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using Global::myLockedScreen; |
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const bool isScreenMergable = screen->isMergable() && myLockedScreen; |
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const bool isScreenTabbable = std::is_base_of<Tabbable, ScreenT>::value; |
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assert(myScreen != screen); |
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if (isScreenMergable) |
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updateInactiveScreen(screen); |
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if (screen->hasToBeResized || isScreenMergable) |
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screen->resize(); |
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TabbableAction_<isScreenTabbable, ScreenT>::execute(screen); |
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myScreen = screen; |
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} |
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}; |
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#endif // NCMPCPP_SCREEN_SWITCHER_H
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