590 lines
14 KiB
C++
590 lines
14 KiB
C++
/* _______ __ __ __ ______ __ __ _______ __ __
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* / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
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* / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
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* / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
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* / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
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* /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
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* \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
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*
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* Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
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*
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* Js_./
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* Per Larsson a.k.a finalman _RqZ{a<^_aa
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* Olof Naessén a.k.a jansem/yakslem _asww7!uY`> )\a//
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* _Qhm`] _f "'c 1!5m
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* Visit: http://guichan.darkbits.org )Qk<P ` _: :+' .' "{[
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* .)j(] .d_/ '-( P . S
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* License: (BSD) <Td/Z <fP"5(\"??"\a. .L
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* Redistribution and use in source and _dV>ws?a-?' ._/L #'
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* binary forms, with or without )4d[#7r, . ' )d`)[
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* modification, are permitted provided _Q-5'5W..j/?' -?!\)cam'
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* that the following conditions are met: j<<WP+k/);. _W=j f
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* 1. Redistributions of source code must .$%w\/]Q . ."' . mj$
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* retain the above copyright notice, ]E.pYY(Q]>. a J@\
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* this list of conditions and the j(]1u<sE"L,. . ./^ ]{a
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* following disclaimer. 4'_uomm\. )L);-4 (3=
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* 2. Redistributions in binary form must )_]X{Z('a_"a7'<a"a, ]"[
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* reproduce the above copyright notice, #}<]m7`Za??4,P-"'7. ).m
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* this list of conditions and the ]d2e)Q(<Q( ?94 b- LQ/
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* following disclaimer in the <B!</]C)d_, '(<' .f. =C+m
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* documentation and/or other materials .Z!=J ]e []('-4f _ ) -.)m]'
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* provided with the distribution. .w[5]' _[ /.)_-"+? _/ <W"
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* 3. Neither the name of Guichan nor the :$we` _! + _/ . j?
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* names of its contributors may be used =3)= _f (_yQmWW$#( "
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* to endorse or promote products derived - W, sQQQQmZQ#Wwa]..
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* from this software without specific (js, \[QQW$QWW#?!V"".
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* prior written permission. ]y:.<\.. .
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* -]n w/ ' [.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT )/ )/ !
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* HOLDERS AND CONTRIBUTORS "AS IS" AND ANY < (; sac , '
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, ]^ .- %
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF c < r
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR aga< <La
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 5% )P'-3L
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR _bQf` y`..)a
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ,J?4P'.P"_(\?d'.,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES _Pa,)!f/<[]/ ?"
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT _2-..:. .r+_,.. .
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ?a.<%"' " -'.a_ _,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ^
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* For comments regarding functions please see the header file.
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*/
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#include "guisan/focushandler.hpp"
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#include "guisan/focuslistener.hpp"
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#include "guisan/exception.hpp"
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#include "guisan/widget.hpp"
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namespace gcn
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{
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FocusHandler::FocusHandler()
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: mFocusedWidget(nullptr),
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mModalFocusedWidget(nullptr),
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mModalMouseInputFocusedWidget(nullptr),
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mDraggedWidget(nullptr),
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mLastWidgetWithMouse(nullptr),
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mLastWidgetWithModalFocus(nullptr),
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mLastWidgetWithModalMouseInputFocus(nullptr),
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mLastWidgetPressed(nullptr)
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{
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}
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void FocusHandler::requestFocus(Widget* widget)
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{
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if (widget == nullptr
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|| widget == mFocusedWidget)
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{
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return;
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}
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auto toBeFocusedIndex = -1;
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for (unsigned int i = 0; i < mWidgets.size(); ++i)
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{
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if (mWidgets[i] == widget)
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{
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toBeFocusedIndex = i;
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break;
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}
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}
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if (toBeFocusedIndex < 0)
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{
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throw GCN_EXCEPTION("Trying to focus a non-existing widget.");
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}
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auto* oldFocused = mFocusedWidget;
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if (oldFocused != widget)
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{
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mFocusedWidget = mWidgets.at(toBeFocusedIndex);
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if (oldFocused != nullptr)
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{
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const Event focusEvent(oldFocused);
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distributeFocusLostEvent(focusEvent);
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}
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const Event focusEvent(mWidgets.at(toBeFocusedIndex));
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distributeFocusGainedEvent(focusEvent);
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}
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}
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void FocusHandler::requestModalFocus(Widget* widget)
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{
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if (mModalFocusedWidget != nullptr && mModalFocusedWidget != widget)
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{
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throw GCN_EXCEPTION("Another widget already has modal focus.");
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}
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mModalFocusedWidget = widget;
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if (mFocusedWidget != nullptr && !mFocusedWidget->hasModalFocus())
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{
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focusNone();
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}
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}
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void FocusHandler::requestModalMouseInputFocus(Widget* widget)
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{
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if (mModalMouseInputFocusedWidget != nullptr
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&& mModalMouseInputFocusedWidget != widget)
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{
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throw GCN_EXCEPTION("Another widget already has modal input focus.");
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}
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mModalMouseInputFocusedWidget = widget;
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}
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void FocusHandler::releaseModalFocus(Widget* widget)
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{
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if (mModalFocusedWidget == widget)
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{
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mModalFocusedWidget = nullptr;
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}
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}
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void FocusHandler::releaseModalMouseInputFocus(Widget* widget)
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{
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if (mModalMouseInputFocusedWidget == widget)
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{
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mModalMouseInputFocusedWidget = nullptr;
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}
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}
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Widget* FocusHandler::getFocused() const
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{
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return mFocusedWidget;
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}
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Widget* FocusHandler::getModalFocused() const
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{
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return mModalFocusedWidget;
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}
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Widget* FocusHandler::getModalMouseInputFocused() const
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{
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return mModalMouseInputFocusedWidget;
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}
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void FocusHandler::focusNext()
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{
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int i;
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auto focusedWidget = -1;
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for (i = 0; i < static_cast<int>(mWidgets.size()); ++i)
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{
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if (mWidgets[i] == mFocusedWidget)
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{
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focusedWidget = i;
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}
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}
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const auto focused = focusedWidget;
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// i is a counter that ensures that the following loop
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// won't get stuck in an infinite loop
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i = static_cast<int>(mWidgets.size());
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do
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{
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++focusedWidget;
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if (i == 0)
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{
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focusedWidget = -1;
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break;
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}
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--i;
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if (focusedWidget >= static_cast<int>(mWidgets.size()))
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{
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focusedWidget = 0;
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}
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if (focusedWidget == focused)
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{
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return;
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}
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}
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while (!mWidgets.at(focusedWidget)->isFocusable());
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if (focusedWidget >= 0)
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{
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mFocusedWidget = mWidgets.at(focusedWidget);
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const Event focusEvent(mFocusedWidget);
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distributeFocusGainedEvent(focusEvent);
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}
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if (focused >= 0)
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{
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const Event focusEvent(mWidgets.at(focused));
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distributeFocusLostEvent(focusEvent);
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}
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}
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void FocusHandler::focusPrevious()
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{
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if (mWidgets.empty())
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{
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mFocusedWidget = nullptr;
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return;
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}
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int i;
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auto focusedWidget = -1;
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for (i = 0; i < static_cast<int>(mWidgets.size()); ++i)
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{
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if (mWidgets[i] == mFocusedWidget)
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{
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focusedWidget = i;
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}
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}
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const auto focused = focusedWidget;
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// i is a counter that ensures that the following loop
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// won't get stuck in an infinite loop
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i = static_cast<int>(mWidgets.size());
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do
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{
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--focusedWidget;
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if (i == 0)
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{
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focusedWidget = -1;
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break;
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}
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--i;
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if (focusedWidget <= 0)
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{
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focusedWidget = mWidgets.size() - 1;
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}
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if (focusedWidget == focused)
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{
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return;
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}
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}
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while (!mWidgets.at(focusedWidget)->isFocusable());
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if (focusedWidget >= 0)
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{
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mFocusedWidget = mWidgets.at(focusedWidget);
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const Event focusEvent(mFocusedWidget);
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distributeFocusGainedEvent(focusEvent);
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}
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if (focused >= 0)
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{
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const Event focusEvent(mWidgets.at(focused));
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distributeFocusLostEvent(focusEvent);
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}
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}
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bool FocusHandler::isFocused(const Widget* widget) const
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{
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return mFocusedWidget == widget;
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}
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void FocusHandler::add(Widget* widget)
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{
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mWidgets.push_back(widget);
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}
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void FocusHandler::remove(Widget* widget)
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{
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if (isFocused(widget))
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{
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mFocusedWidget = nullptr;
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}
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for (auto iter = mWidgets.begin(); iter != mWidgets.end(); ++iter)
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{
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if (*iter == widget)
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{
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mWidgets.erase(iter);
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break;
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}
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}
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if (mDraggedWidget == widget)
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{
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mDraggedWidget = nullptr;
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return;
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}
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if (mLastWidgetWithMouse == widget)
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{
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mLastWidgetWithMouse = nullptr;
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return;
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}
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if (mLastWidgetWithModalFocus == widget)
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{
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mLastWidgetWithModalFocus = nullptr;
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return;
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}
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if (mLastWidgetWithModalMouseInputFocus == widget)
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{
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mLastWidgetWithModalMouseInputFocus = nullptr;
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return;
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}
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if (mLastWidgetPressed == widget)
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{
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mLastWidgetPressed = nullptr;
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}
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}
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void FocusHandler::focusNone()
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{
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if (mFocusedWidget != nullptr)
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{
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auto* const focused = mFocusedWidget;
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mFocusedWidget = nullptr;
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const Event focusEvent(focused);
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distributeFocusLostEvent(focusEvent);
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}
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}
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void FocusHandler::tabNext()
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{
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if (mFocusedWidget != nullptr)
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{
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if (!mFocusedWidget->isTabOutEnabled())
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{
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return;
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}
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}
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if (mWidgets.empty())
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{
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mFocusedWidget = nullptr;
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return;
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}
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int i;
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auto focusedWidget = -1;
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for (i = 0; i < static_cast<int>(mWidgets.size()); ++i)
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{
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if (mWidgets[i] == mFocusedWidget)
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{
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focusedWidget = i;
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}
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}
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const auto focused = focusedWidget;
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auto done = false;
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// i is a counter that ensures that the following loop
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// won't get stuck in an infinite loop
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i = static_cast<int>(mWidgets.size());
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do
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{
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++focusedWidget;
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if (i == 0)
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{
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focusedWidget = -1;
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break;
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}
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--i;
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if (focusedWidget >= static_cast<int>(mWidgets.size()))
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{
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focusedWidget = 0;
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}
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if (focusedWidget == focused)
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{
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return;
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}
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if (mWidgets.at(focusedWidget)->isFocusable() &&
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mWidgets.at(focusedWidget)->isTabInEnabled() &&
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(mModalFocusedWidget == nullptr ||
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mWidgets.at(focusedWidget)->hasModalFocus()))
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{
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done = true;
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}
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}
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while (!done);
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if (focusedWidget >= 0)
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{
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mFocusedWidget = mWidgets.at(focusedWidget);
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const Event focusEvent(mFocusedWidget);
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distributeFocusGainedEvent(focusEvent);
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}
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if (focused >= 0)
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{
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const Event focusEvent(mWidgets.at(focused));
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distributeFocusLostEvent(focusEvent);
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}
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}
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void FocusHandler::tabPrevious()
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{
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if (mFocusedWidget != nullptr)
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{
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if (!mFocusedWidget->isTabOutEnabled())
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{
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return;
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}
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}
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if (mWidgets.empty())
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{
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mFocusedWidget = nullptr;
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return;
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}
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int i;
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auto focusedWidget = -1;
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for (i = 0; i < static_cast<int>(mWidgets.size()); ++i)
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{
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if (mWidgets[i] == mFocusedWidget)
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{
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focusedWidget = i;
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}
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}
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const auto focused = focusedWidget;
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auto done = false;
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// i is a counter that ensures that the following loop
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// won't get stuck in an infinite loop
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i = static_cast<int>(mWidgets.size());
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do
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{
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--focusedWidget;
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if (i == 0)
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{
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focusedWidget = -1;
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break;
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}
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--i;
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if (focusedWidget <= 0)
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{
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focusedWidget = mWidgets.size() - 1;
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}
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if (focusedWidget == focused)
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{
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return;
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}
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if (mWidgets.at(focusedWidget)->isFocusable() &&
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mWidgets.at(focusedWidget)->isTabInEnabled() &&
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(mModalFocusedWidget == nullptr ||
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mWidgets.at(focusedWidget)->hasModalFocus()))
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{
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done = true;
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}
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}
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while (!done);
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if (focusedWidget >= 0)
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{
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mFocusedWidget = mWidgets.at(focusedWidget);
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const Event focusEvent(mFocusedWidget);
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distributeFocusGainedEvent(focusEvent);
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}
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if (focused >= 0)
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{
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const Event focusEvent(mWidgets.at(focused));
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distributeFocusLostEvent(focusEvent);
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}
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}
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void FocusHandler::distributeFocusLostEvent(const Event& focusEvent)
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{
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auto* sourceWidget = focusEvent.getSource();
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auto focusListeners = sourceWidget->_getFocusListeners();
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// Send the event to all focus listeners of the widget.
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for (auto& focusListener : focusListeners)
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{
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focusListener->focusLost(focusEvent);
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}
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}
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void FocusHandler::distributeFocusGainedEvent(const Event& focusEvent)
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{
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auto* sourceWidget = focusEvent.getSource();
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auto focusListeners = sourceWidget->_getFocusListeners();
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// Send the event to all focus listeners of the widget.
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for (auto& focusListener : focusListeners)
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{
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focusListener->focusGained(focusEvent);
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}
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}
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Widget* FocusHandler::getDraggedWidget()
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{
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return mDraggedWidget;
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}
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void FocusHandler::setDraggedWidget(Widget* draggedWidget)
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{
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mDraggedWidget = draggedWidget;
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}
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Widget* FocusHandler::getLastWidgetWithMouse()
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{
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return mLastWidgetWithMouse;
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}
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void FocusHandler::setLastWidgetWithMouse(Widget* lastWidgetWithMouse)
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{
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mLastWidgetWithMouse = lastWidgetWithMouse;
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}
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Widget* FocusHandler::getLastWidgetWithModalFocus()
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{
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return mLastWidgetWithModalFocus;
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}
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void FocusHandler::setLastWidgetWithModalFocus(Widget* lastWidgetWithModalFocus)
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{
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mLastWidgetWithModalFocus = lastWidgetWithModalFocus;
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}
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Widget* FocusHandler::getLastWidgetWithModalMouseInputFocus()
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{
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return mLastWidgetWithModalMouseInputFocus;
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}
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void FocusHandler::setLastWidgetWithModalMouseInputFocus(Widget* lastWidgetWithModalMouseInputFocus)
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{
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mLastWidgetWithModalMouseInputFocus = lastWidgetWithModalMouseInputFocus;
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}
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Widget* FocusHandler::getLastWidgetPressed()
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{
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return mLastWidgetPressed;
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}
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void FocusHandler::setLastWidgetPressed(Widget* lastWidgetPressed)
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{
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mLastWidgetPressed = lastWidgetPressed;
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}
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}
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