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Diffstat (limited to 'src/gui/base/focushandler.hpp')
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diff --git a/src/gui/base/focushandler.hpp b/src/gui/base/focushandler.hpp new file mode 100644 index 000000000..aab3f2464 --- /dev/null +++ b/src/gui/base/focushandler.hpp @@ -0,0 +1,417 @@ +/* + * The ManaPlus Client + * Copyright (C) 2011-2014 The ManaPlus Developers + * + * This file is part of The ManaPlus Client. + * + * 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 + * 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, see <http://www.gnu.org/licenses/>. + */ + +/* _______ __ __ __ ______ __ __ _______ __ __ + * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\ + * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / / + * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / / + * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / / + * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ / + * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/ + * + * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson + * + * + * Per Larsson a.k.a finalman + * Olof Naessén a.k.a jansem/yakslem + * + * Visit: http://guichan.sourceforge.net + * + * License: (BSD) + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name of Guichan nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef GCN_FOCUSHANDLER_HPP +#define GCN_FOCUSHANDLER_HPP + +#include <vector> + +#include "gui/base/event.hpp" + +namespace gcn +{ + class Widget; + + /** + * Handles focus for widgets in a Gui. Each Gui has at least one + * focus handler. + * You will probably not use the focus handler directly as Widget + * has functions that automatically uses the active focus handler. + * + * @see Widget::isFocus, Widget::isModalFocused, + * Widget::isModalMouseInputFocused, Widget::requestFocus, + * Widget::requestModalFocus, Widget::requestModalMouseInputFocus, + * Widget::releaseModalFocus, Widget::relaseModalMouseInputFocus, + * Widget::setFocusable, Widget::isFocusable, FocusListener + * + * @since 0.1.0 + */ + class FocusHandler + { + public: + /** + * Constructor. + */ + FocusHandler(); + + A_DELETE_COPY(FocusHandler) + + /** + * Destructor. + */ + virtual ~FocusHandler() + { } + + /** + * Requests focus for a widget. Focus will only be granted to a widget + * if it's focusable and if no other widget has modal focus. + * If a widget receives focus a focus event will be sent to the + * focus listeners of the widget. + * + * @param widget The widget to request focus for. + * @see isFocused, Widget::requestFocus + */ + virtual void requestFocus(Widget* widget); + + /** + * Requests modal focus for a widget. Focus will only be granted + * to a widget if it's focusable and if no other widget has modal + * focus. + * + * @param widget The widget to request modal focus for. + * @throws Exception when another widget already has modal focus. + * @see releaseModalFocus, Widget::requestModalFocus + */ + virtual void requestModalFocus(Widget* widget); + + /** + * Requests modal mouse input focus for a widget. Focus will only + * be granted to a widget if it's focusable and if no other widget + * has modal mouse input focus. + * + * Modal mouse input focus means no other widget then the widget with + * modal mouse input focus will receive mouse input. The widget with + * modal mouse input focus will also receive mouse input no matter what + * the mouse input is or where the mouse input occurs. + * + * @param widget The widget to focus for modal mouse input focus. + * @throws Exception when another widget already has modal mouse input + * focus. + * @see releaseModalMouseInputFocus, Widget::requestModalMouseInputFocus + */ + virtual void requestModalMouseInputFocus(Widget* widget); + + /** + * Releases modal focus if the widget has modal focus. + * If the widget doesn't have modal focus no relase will occur. + * + * @param widget The widget to release modal focus for. + * @see reuqestModalFocus, Widget::releaseModalFocus + */ + virtual void releaseModalFocus(Widget* widget); + + /** + * Releases modal mouse input focus if the widget has modal mouse input + * focus. If the widget doesn't have modal mouse input focus no relase + * will occur. + * + * @param widget the widget to release modal mouse input focus for. + * @see requestModalMouseInputFocus, Widget::releaseModalMouseInputFocus + */ + virtual void releaseModalMouseInputFocus(Widget* widget); + + /** + * Checks if a widget is focused. + * + * @param widget The widget to check. + * @return True if the widget is focused, false otherwise. + * @see Widget::isFocused + */ + virtual bool isFocused(const Widget* widget) const; + + /** + * Gets the widget with focus. + * + * @return The widget with focus. NULL if no widget has focus. + */ + virtual Widget* getFocused() const A_WARN_UNUSED; + + /** + * Gets the widget with modal focus. + * + * @return The widget with modal focus. NULL if no widget has + * modal focus. + */ + virtual Widget* getModalFocused() const A_WARN_UNUSED; + + /** + * Gets the widget with modal mouse input focus. + * + * @return The widget with modal mouse input focus. NULL if + * no widget has modal mouse input focus. + */ + virtual Widget* getModalMouseInputFocused() const A_WARN_UNUSED; + + /** + * Focuses the next widget added to a conainer. + * If no widget has focus the first widget gets focus. The order + * in which the widgets are focused is determined by the order + * they were added to a container. + * + * @see focusPrevious + */ + virtual void focusNext(); + + /** + * Focuses the previous widget added to a contaienr. + * If no widget has focus the first widget gets focus. The order + * in which the widgets are focused is determined by the order + * they were added to a container. + * + * @see focusNext + */ + virtual void focusPrevious(); + + /** + * Adds a widget to by handles by the focus handler. + * + * @param widget The widget to add. + * @see remove + */ + virtual void add(Widget* widget); + + /** + * Removes a widget from the focus handler. + * + * @param widget The widget to remove. + * @see add + */ + virtual void remove(Widget* widget); + + /** + * Focuses nothing. A focus event will also be sent to the + * focused widget's focus listeners if a widget has focus. + */ + virtual void focusNone(); + + /** + * Focuses the next widget which allows tabbing in unless + * the current focused Widget disallows tabbing out. + * + * @see tabPrevious + */ + virtual void tabNext(); + + /** + * Focuses the previous widget which allows tabbing in unless + * current focused widget disallows tabbing out. + * + * @see tabNext + */ + virtual void tabPrevious(); + + /** + * Gets the widget being dragged. Used by the Gui class to + * keep track of the dragged widget. + * + * @return the widget being dragged. + * @see setDraggedWidget + */ + virtual Widget* getDraggedWidget() A_WARN_UNUSED; + + /** + * Sets the widget being dragged. Used by the Gui class to + * keep track of the dragged widget. + * + * @param draggedWidget The widget being dragged. + * @see getDraggedWidget + */ + virtual void setDraggedWidget(Widget* draggedWidget); + + /** + * Gets the last widget with the mouse. Used by the Gui class + * to keep track the last widget with the mouse. + * + * @return The last widget with the mouse. + * @see setLastWidgetWithMouse + */ + virtual Widget* getLastWidgetWithMouse() A_WARN_UNUSED; + + /** + * Sets the last widget with the mouse. Used by the Gui class + * to keep track the last widget with the mouse. + * + * @param lastWidgetWithMouse The last widget with the mouse. + * @see getLastWidgetWithMouse + */ + virtual void setLastWidgetWithMouse(Widget* lastWidgetWithMouse); + + /** + * Gets the last widget with modal focus. + * + * @return The last widget with modal focus. + * @see setLastWidgetWithModalFocus + */ + virtual Widget* getLastWidgetWithModalFocus() A_WARN_UNUSED; + + /** + * Sets the last widget with modal focus. + * + * @param widget The last widget with modal focus. + * @see getLastWidgetWithModalFocus + */ + virtual void setLastWidgetWithModalFocus(Widget* widget); + + /** + * Gets the last widget with modal mouse input focus. + * + * @return The last widget with modal mouse input focus. + * @see setLastWidgetWithModalMouseInputFocus + */ + virtual Widget* getLastWidgetWithModalMouseInputFocus() A_WARN_UNUSED; + + /** + * Sets the last widget with modal mouse input focus. + * + * @param widget The last widget with modal mouse input focus. + * @see getLastWidgetWithModalMouseInputFocus + */ + virtual void setLastWidgetWithModalMouseInputFocus(Widget* widget); + + /** + * Gets the last widget pressed. Used by the Gui class to keep track + * of pressed widgets. + * + * @return The last widget pressed. + * @see setLastWidgetPressed + */ + virtual Widget* getLastWidgetPressed() A_WARN_UNUSED; + + /** + * Sets the last widget pressed. Used by the Gui class to keep track + * of pressed widgets. + * + * @param lastWidgetPressed The last widget pressed. + * @see getLastWidgetPressed + */ + virtual void setLastWidgetPressed(Widget* lastWidgetPressed); + + protected: + /** + * Distributes a focus lost event. + * + * @param focusEvent the event to distribute. + * @since 0.7.0 + */ + virtual void distributeFocusLostEvent(const Event& focusEvent); + + /** + * Distributes a focus gained event. + * + * @param focusEvent the event to distribute. + * @since 0.7.0 + */ + virtual void distributeFocusGainedEvent(const Event& focusEvent); + + /** + * Typedef. + */ + typedef std::vector<Widget*> WidgetVector; + + /** + * Typedef. + */ + typedef WidgetVector::iterator WidgetIterator; + + /** + * Holds the widgets currently being handled by the + * focus handler. + */ + WidgetVector mWidgets; + + /** + * Holds the focused widget. NULL if no widget has focus. + */ + Widget* mFocusedWidget; + + /** + * Holds the modal focused widget. NULL if no widget has + * modal focused. + */ + Widget* mModalFocusedWidget; + + /** + * Holds the modal mouse input focused widget. NULL if no widget + * is being dragged. + */ + Widget* mModalMouseInputFocusedWidget; + + /** + * Holds the dragged widget. NULL if no widget is + * being dragged. + */ + Widget* mDraggedWidget; + + /** + * Holds the last widget with the mouse. + */ + Widget* mLastWidgetWithMouse; + + /** + * Holds the last widget with modal focus. + */ + Widget* mLastWidgetWithModalFocus; + + /** + * Holds the last widget with modal mouse input focus. + */ + Widget* mLastWidgetWithModalMouseInputFocus; + + /** + * Holds the last widget pressed. + */ + Widget* mLastWidgetPressed; + }; +} // namespace gcn + +#endif // end GCN_FOCUSHANDLER_HPP |