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+/* _______ __ __ __ ______ __ __ _______ __ __
+ * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
+ * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
+ * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * 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.
+ */
+
+/*
+ * For comments regarding functions please see the header file.
+ */
+
+#include "guichan/focushandler.hpp"
+
+#include "guichan/focuslistener.hpp"
+#include "guichan/exception.hpp"
+#include "guichan/widget.hpp"
+
+namespace gcn
+{
+ FocusHandler::FocusHandler()
+ :mFocusedWidget(NULL),
+ mModalFocusedWidget(NULL),
+ mModalMouseInputFocusedWidget(NULL),
+ mDraggedWidget(NULL),
+ mLastWidgetWithMouse(NULL),
+ mLastWidgetWithModalFocus(NULL),
+ mLastWidgetWithModalMouseInputFocus(NULL),
+ mLastWidgetPressed(NULL)
+ {
+
+ }
+
+ void FocusHandler::requestFocus(Widget* widget)
+ {
+ if (widget == NULL
+ || widget == mFocusedWidget)
+ {
+ return;
+ }
+
+ unsigned int i = 0;
+ int toBeFocusedIndex = -1;
+ for (i = 0; i < mWidgets.size(); ++i)
+ {
+ if (mWidgets[i] == widget)
+ {
+ toBeFocusedIndex = i;
+ break;
+ }
+ }
+
+ if (toBeFocusedIndex < 0)
+ {
+ throw GCN_EXCEPTION("Trying to focus a none existing widget.");
+ }
+
+ Widget *oldFocused = mFocusedWidget;
+
+ if (oldFocused != widget)
+ {
+ mFocusedWidget = mWidgets.at(toBeFocusedIndex);
+
+ if (oldFocused != NULL)
+ {
+ Event focusEvent(oldFocused);
+ distributeFocusLostEvent(focusEvent);
+ }
+
+ Event focusEvent(mWidgets.at(toBeFocusedIndex));
+ distributeFocusGainedEvent(focusEvent);
+ }
+ }
+
+ void FocusHandler::requestModalFocus(Widget* widget)
+ {
+ if (mModalFocusedWidget != NULL && mModalFocusedWidget != widget)
+ {
+ throw GCN_EXCEPTION("Another widget already has modal focus.");
+ }
+
+ mModalFocusedWidget = widget;
+
+ if (mFocusedWidget != NULL
+ && !mFocusedWidget->isModalFocused())
+ {
+ focusNone();
+ }
+ }
+
+ void FocusHandler::requestModalMouseInputFocus(Widget* widget)
+ {
+ if (mModalMouseInputFocusedWidget != NULL
+ && mModalMouseInputFocusedWidget != widget)
+ {
+ throw GCN_EXCEPTION("Another widget already has modal input focus.");
+ }
+
+ mModalMouseInputFocusedWidget = widget;
+ }
+
+ void FocusHandler::releaseModalFocus(Widget* widget)
+ {
+ if (mModalFocusedWidget == widget)
+ {
+ mModalFocusedWidget = NULL;
+ }
+ }
+
+ void FocusHandler::releaseModalMouseInputFocus(Widget* widget)
+ {
+ if (mModalMouseInputFocusedWidget == widget)
+ {
+ mModalMouseInputFocusedWidget = NULL;
+ }
+ }
+
+ Widget* FocusHandler::getFocused() const
+ {
+ return mFocusedWidget;
+ }
+
+ Widget* FocusHandler::getModalFocused() const
+ {
+ return mModalFocusedWidget;
+ }
+
+ Widget* FocusHandler::getModalMouseInputFocused() const
+ {
+ return mModalMouseInputFocusedWidget;
+ }
+
+ void FocusHandler::focusNext()
+ {
+ int i;
+ int focusedWidget = -1;
+ for (i = 0; i < (int)mWidgets.size(); ++i)
+ {
+ if (mWidgets[i] == mFocusedWidget)
+ {
+ focusedWidget = i;
+ }
+ }
+ int focused = focusedWidget;
+
+ // i is a counter that ensures that the following loop
+ // won't get stuck in an infinite loop
+ i = (int)mWidgets.size();
+ do
+ {
+ ++focusedWidget;
+
+ if (i==0)
+ {
+ focusedWidget = -1;
+ break;
+ }
+
+ --i;
+
+ if (focusedWidget >= (int)mWidgets.size())
+ {
+ focusedWidget = 0;
+ }
+
+ if (focusedWidget == focused)
+ {
+ return;
+ }
+ }
+ while (!mWidgets.at(focusedWidget)->isFocusable());
+
+ if (focusedWidget >= 0)
+ {
+ mFocusedWidget = mWidgets.at(focusedWidget);
+
+ Event focusEvent(mFocusedWidget);
+ distributeFocusGainedEvent(focusEvent);
+ }
+
+ if (focused >= 0)
+ {
+ Event focusEvent(mWidgets.at(focused));
+ distributeFocusLostEvent(focusEvent);
+ }
+ }
+
+ void FocusHandler::focusPrevious()
+ {
+ if (mWidgets.size() == 0)
+ {
+ mFocusedWidget = NULL;
+ return;
+ }
+
+ int i;
+ int focusedWidget = -1;
+ for (i = 0; i < (int)mWidgets.size(); ++i)
+ {
+ if (mWidgets[i] == mFocusedWidget)
+ {
+ focusedWidget = i;
+ }
+ }
+ int focused = focusedWidget;
+
+ // i is a counter that ensures that the following loop
+ // won't get stuck in an infinite loop
+ i = (int)mWidgets.size();
+ do
+ {
+ --focusedWidget;
+
+ if (i==0)
+ {
+ focusedWidget = -1;
+ break;
+ }
+
+ --i;
+
+ if (focusedWidget <= 0)
+ {
+ focusedWidget = mWidgets.size() - 1;
+ }
+
+ if (focusedWidget == focused)
+ {
+ return;
+ }
+ }
+ while (!mWidgets.at(focusedWidget)->isFocusable());
+
+ if (focusedWidget >= 0)
+ {
+ mFocusedWidget = mWidgets.at(focusedWidget);
+ Event focusEvent(mFocusedWidget);
+ distributeFocusGainedEvent(focusEvent);
+ }
+
+ if (focused >= 0)
+ {
+ Event focusEvent(mWidgets.at(focused));
+ distributeFocusLostEvent(focusEvent);
+ }
+ }
+
+ bool FocusHandler::isFocused(const Widget* widget) const
+ {
+ return mFocusedWidget == widget;
+ }
+
+ void FocusHandler::add(Widget* widget)
+ {
+ mWidgets.push_back(widget);
+ }
+
+ void FocusHandler::remove(Widget* widget)
+ {
+ if (isFocused(widget))
+ {
+ mFocusedWidget = NULL;
+ }
+
+ WidgetIterator iter;
+
+ for (iter = mWidgets.begin(); iter != mWidgets.end(); ++iter)
+ {
+ if ((*iter) == widget)
+ {
+ mWidgets.erase(iter);
+ break;
+ }
+ }
+
+ if (mDraggedWidget == widget)
+ {
+ mDraggedWidget = NULL;
+ return;
+ }
+
+ if (mLastWidgetWithMouse == widget)
+ {
+ mLastWidgetWithMouse = NULL;
+ return;
+ }
+
+ if (mLastWidgetWithModalFocus == widget)
+ {
+ mLastWidgetWithModalFocus = NULL;
+ return;
+ }
+
+ if (mLastWidgetWithModalMouseInputFocus == widget)
+ {
+ mLastWidgetWithModalMouseInputFocus = NULL;
+ return;
+ }
+
+ if (mLastWidgetPressed == widget)
+ {
+ mLastWidgetPressed = NULL;
+ return;
+ }
+ }
+
+ void FocusHandler::focusNone()
+ {
+ if (mFocusedWidget != NULL)
+ {
+ Widget* focused = mFocusedWidget;
+ mFocusedWidget = NULL;
+
+ Event focusEvent(focused);
+ distributeFocusLostEvent(focusEvent);
+ }
+ }
+
+ void FocusHandler::tabNext()
+ {
+ if (mFocusedWidget != NULL)
+ {
+ if (!mFocusedWidget->isTabOutEnabled())
+ {
+ return;
+ }
+ }
+
+ if (mWidgets.size() == 0)
+ {
+ mFocusedWidget = NULL;
+ return;
+ }
+
+ int i;
+ int focusedWidget = -1;
+ for (i = 0; i < (int)mWidgets.size(); ++i)
+ {
+ if (mWidgets[i] == mFocusedWidget)
+ {
+ focusedWidget = i;
+ }
+ }
+ int focused = focusedWidget;
+ bool done = false;
+
+ // i is a counter that ensures that the following loop
+ // won't get stuck in an infinite loop
+ i = (int)mWidgets.size();
+ do
+ {
+ ++focusedWidget;
+
+ if (i==0)
+ {
+ focusedWidget = -1;
+ break;
+ }
+
+ --i;
+
+ if (focusedWidget >= (int)mWidgets.size())
+ {
+ focusedWidget = 0;
+ }
+
+ if (focusedWidget == focused)
+ {
+ return;
+ }
+
+ if (mWidgets.at(focusedWidget)->isFocusable() &&
+ mWidgets.at(focusedWidget)->isTabInEnabled() &&
+ (mModalFocusedWidget == NULL ||
+ mWidgets.at(focusedWidget)->isModalFocused()))
+ {
+ done = true;
+ }
+ }
+ while (!done);
+
+ if (focusedWidget >= 0)
+ {
+ mFocusedWidget = mWidgets.at(focusedWidget);
+ Event focusEvent(mFocusedWidget);
+ distributeFocusGainedEvent(focusEvent);
+ }
+
+ if (focused >= 0)
+ {
+ Event focusEvent(mWidgets.at(focused));
+ distributeFocusLostEvent(focusEvent);
+ }
+ }
+
+ void FocusHandler::tabPrevious()
+ {
+ if (mFocusedWidget != NULL)
+ {
+ if (!mFocusedWidget->isTabOutEnabled())
+ {
+ return;
+ }
+ }
+
+ if (mWidgets.size() == 0)
+ {
+ mFocusedWidget = NULL;
+ return;
+ }
+
+ int i;
+ int focusedWidget = -1;
+ for (i = 0; i < (int)mWidgets.size(); ++i)
+ {
+ if (mWidgets[i] == mFocusedWidget)
+ {
+ focusedWidget = i;
+ }
+ }
+ int focused = focusedWidget;
+ bool done = false;
+
+ // i is a counter that ensures that the following loop
+ // won't get stuck in an infinite loop
+ i = (int)mWidgets.size();
+ do
+ {
+ --focusedWidget;
+
+ if (i==0)
+ {
+ focusedWidget = -1;
+ break;
+ }
+
+ --i;
+
+ if (focusedWidget <= 0)
+ {
+ focusedWidget = mWidgets.size() - 1;
+ }
+
+ if (focusedWidget == focused)
+ {
+ return;
+ }
+
+ if (mWidgets.at(focusedWidget)->isFocusable() &&
+ mWidgets.at(focusedWidget)->isTabInEnabled() &&
+ (mModalFocusedWidget == NULL ||
+ mWidgets.at(focusedWidget)->isModalFocused()))
+ {
+ done = true;
+ }
+ }
+ while (!done);
+
+ if (focusedWidget >= 0)
+ {
+ mFocusedWidget = mWidgets.at(focusedWidget);
+ Event focusEvent(mFocusedWidget);
+ distributeFocusGainedEvent(focusEvent);
+ }
+
+ if (focused >= 0)
+ {
+ Event focusEvent(mWidgets.at(focused));
+ distributeFocusLostEvent(focusEvent);
+ }
+ }
+
+ void FocusHandler::distributeFocusLostEvent(const Event& focusEvent)
+ {
+ Widget* sourceWidget = focusEvent.getSource();
+
+ std::list<FocusListener*> focusListeners = sourceWidget->_getFocusListeners();
+
+ // Send the event to all focus listeners of the widget.
+ for (std::list<FocusListener*>::iterator it = focusListeners.begin();
+ it != focusListeners.end();
+ ++it)
+ {
+ (*it)->focusLost(focusEvent);
+ }
+ }
+
+ void FocusHandler::distributeFocusGainedEvent(const Event& focusEvent)
+ {
+ Widget* sourceWidget = focusEvent.getSource();
+
+ std::list<FocusListener*> focusListeners = sourceWidget->_getFocusListeners();
+
+ // Send the event to all focus listeners of the widget.
+ for (std::list<FocusListener*>::iterator it = focusListeners.begin();
+ it != focusListeners.end();
+ ++it)
+ {
+ (*it)->focusGained(focusEvent);
+ }
+ }
+
+ Widget* FocusHandler::getDraggedWidget()
+ {
+ return mDraggedWidget;
+ }
+
+ void FocusHandler::setDraggedWidget(Widget* draggedWidget)
+ {
+ mDraggedWidget = draggedWidget;
+ }
+
+ Widget* FocusHandler::getLastWidgetWithMouse()
+ {
+ return mLastWidgetWithMouse;
+ }
+
+ void FocusHandler::setLastWidgetWithMouse(Widget* lastWidgetWithMouse)
+ {
+ mLastWidgetWithMouse = lastWidgetWithMouse;
+ }
+
+ Widget* FocusHandler::getLastWidgetWithModalFocus()
+ {
+ return mLastWidgetWithModalFocus;
+ }
+
+ void FocusHandler::setLastWidgetWithModalFocus(Widget* lastWidgetWithModalFocus)
+ {
+ mLastWidgetWithModalFocus = lastWidgetWithModalFocus;
+ }
+
+ Widget* FocusHandler::getLastWidgetWithModalMouseInputFocus()
+ {
+ return mLastWidgetWithModalMouseInputFocus;
+ }
+
+ void FocusHandler::setLastWidgetWithModalMouseInputFocus(Widget* lastWidgetWithModalMouseInputFocus)
+ {
+ mLastWidgetWithModalMouseInputFocus = lastWidgetWithModalMouseInputFocus;
+ }
+
+ Widget* FocusHandler::getLastWidgetPressed()
+ {
+ return mLastWidgetPressed;
+ }
+
+ void FocusHandler::setLastWidgetPressed(Widget* lastWidgetPressed)
+ {
+ mLastWidgetPressed = lastWidgetPressed;
+ }
+}
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