FocusHandler Class Reference

#include <focushandler.h>

Public Member Functions
	FocusHandler ()
void	requestFocus (const Widget *const widget)
void	requestModalFocus (Widget *const widget)
void	requestModalMouseInputFocus (Widget *const widget)
void	releaseModalFocus (Widget *const widget)
void	releaseModalMouseInputFocus (const Widget *const widget)
bool	isFocused (const Widget *const widget) const
Widget *	getFocused () const
Widget *	getModalFocused () const
Widget *	getModalMouseInputFocused () const
void	focusNext ()
void	focusPrevious ()
void	add (Widget *const widget)
void	remove (Widget *const widget)
void	focusNone ()
void	tabNext ()
void	tabPrevious ()
Widget *	getDraggedWidget () const
void	setDraggedWidget (Widget *const draggedWidget)
Widget *	getLastWidgetWithMouse () const
void	setLastWidgetWithMouse (Widget *const lastWidgetWithMouse)
Widget *	getLastWidgetWithModalFocus () const
void	setLastWidgetWithModalFocus (Widget *const widget)
Widget *	getLastWidgetWithModalMouseInputFocus () const
void	setLastWidgetWithModalMouseInputFocus (Widget *const widget)
Widget *	getLastWidgetPressed () const
void	setLastWidgetPressed (Widget *const lastWidgetPressed)

Private Types
typedef std::vector< Widget * >	WidgetVector
typedef WidgetVector::iterator	WidgetIterator

Private Member Functions
void	checkForWindow () const

Static Private Member Functions
static void	distributeFocusLostEvent (const Event &focusEvent)
static void	distributeFocusGainedEvent (const Event &focusEvent)

Private Attributes
WidgetVector	mWidgets
Widget *	mFocusedWidget
Widget *	mModalFocusedWidget
Widget *	mModalMouseInputFocusedWidget
Widget *	mDraggedWidget
Widget *	mLastWidgetWithMouse
Widget *	mLastWidgetWithModalFocus
Widget *	mLastWidgetWithModalMouseInputFocus
Widget *	mLastWidgetPressed
std::list< Widget * >	mModalStack

Detailed Description

The focus handler. This focus handler does exactly the same as the Guichan focus handler, but keeps a stack of modal widgets to be able to handle multiple modal focus requests.

Definition at line 83 of file focushandler.h.

Member Typedef Documentation

WidgetIterator

typedef WidgetVector::iterator FocusHandler::WidgetIterator

private

Typedef.

Definition at line 353 of file focushandler.h.

WidgetVector

typedef std::vector<Widget*> FocusHandler::WidgetVector

private

Typedef.

Definition at line 348 of file focushandler.h.

Constructor & Destructor Documentation

FocusHandler()

FocusHandler::FocusHandler

(

)

Definition at line 78 of file focushandler.cpp.

 :
 mWidgets(),
 mFocusedWidget(nullptr),
 mModalFocusedWidget(nullptr),
 mModalMouseInputFocusedWidget(nullptr),
 mDraggedWidget(nullptr),
 mLastWidgetWithMouse(nullptr),
 mLastWidgetWithModalFocus(nullptr),
 mLastWidgetWithModalMouseInputFocus(nullptr),
 mLastWidgetPressed(nullptr),
 mModalStack()
{
}

Member Function Documentation

add()

void FocusHandler::add

(

Widget *const

widget

)

Adds a widget to by handles by the focus handler.

Parameters

widget

The widget to add.

See also

remove

Definition at line 537 of file focushandler.cpp.

References mWidgets.

Referenced by Widget::setFocusHandler().

{
 mWidgets.push_back(widget);
}

checkForWindow()

void FocusHandler::checkForWindow ( ) const

private

Checks to see if the widget tabbed to is in a window, and if it is, it requests the window be moved to the top.

Definition at line 316 of file focushandler.cpp.

References Widget::getParent(), mFocusedWidget, and Widget::requestMoveToTop().

Referenced by tabNext(), and tabPrevious().

{
 if (mFocusedWidget != nullptr)
 {
 Widget *widget = mFocusedWidget->getParent();

 while (widget != nullptr)
 {
 Window *const window = dynamic_cast<Window*>(widget);

 if (window != nullptr)
 {
 window->requestMoveToTop();
 break;
 }

 widget = widget->getParent();
 }
 }
}

distributeFocusGainedEvent()

void FocusHandler::distributeFocusGainedEvent ( const Event &  focusEvent )

staticprivate

Distributes a focus gained event.

Parameters

focusEvent

the event to distribute.

Definition at line 337 of file focushandler.cpp.

References Gui::distributeGlobalFocusGainedEvent(), Widget::getFocusListeners(), Event::getSource(), and gui.

Referenced by focusNext(), focusPrevious(), requestFocus(), tabNext(), and tabPrevious().

{
 if (gui != nullptr)
 gui->distributeGlobalFocusGainedEvent(focusEvent);

 const Widget *const sourceWidget = focusEvent.getSource();

 if (sourceWidget == nullptr)
 return;
 std::list<FocusListener*> focusListeners
 = sourceWidget->getFocusListeners();

 // Send the event to all focus listeners of the widget.
 for (std::list<FocusListener*>::const_iterator
 it = focusListeners.begin();
 it != focusListeners.end();
 ++ it)
 {
 (*it)->focusGained(focusEvent);
 }
}

distributeFocusLostEvent()

void FocusHandler::distributeFocusLostEvent ( const Event &  focusEvent )

staticprivate

Distributes a focus lost event.

Parameters

focusEvent

the event to distribute.

Definition at line 554 of file focushandler.cpp.

References Widget::getFocusListeners(), and Event::getSource().

Referenced by focusNext(), focusNone(), focusPrevious(), requestFocus(), tabNext(), and tabPrevious().

{
 const Widget *const sourceWidget = focusEvent.getSource();
 if (sourceWidget == nullptr)
 return;

 std::list<FocusListener*> focusListeners
 = sourceWidget->getFocusListeners();

 // Send the event to all focus listeners of the widget.
 for (std::list<FocusListener*>::const_iterator
 it = focusListeners.begin();
 it != focusListeners.end();
 ++ it)
 {
 (*it)->focusLost(focusEvent);
 }
}

focusNext()

void FocusHandler::focusNext

(

)

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 also

focusPrevious

Definition at line 427 of file focushandler.cpp.

References CAST_S32, distributeFocusGainedEvent(), distributeFocusLostEvent(), mFocusedWidget, and mWidgets.

{
 int i;
 int focusedWidget = -1;
 const int sz = CAST_S32(mWidgets.size());
 for (i = 0; i < sz; ++i)
 {
 if (mWidgets[i] == mFocusedWidget)
 focusedWidget = i;
 }
 const int focused = focusedWidget;

 // i is a counter that ensures that the following loop
 // won't get stuck in an infinite loop
 i = sz;
 do
 {
 ++ focusedWidget;

 if (i == 0)
 {
 focusedWidget = -1;
 break;
 }

 -- i;

 if (focusedWidget >= sz)
 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);
 }
}

focusNone()

void FocusHandler::focusNone

(

)

Focuses nothing. A focus event will also be sent to the focused widget's focus listeners if a widget has focus.

Definition at line 542 of file focushandler.cpp.

References distributeFocusLostEvent(), and mFocusedWidget.

Referenced by ChatWindow::action(), Gui::handleKeyInput(), requestModalFocus(), Widget::setFocusable(), Widget::setVisible(), and Window::widgetHidden().

{
 if (mFocusedWidget != nullptr)
 {
 Widget *const focused = mFocusedWidget;
 mFocusedWidget = nullptr;

 Event focusEvent(focused);
 distributeFocusLostEvent(focusEvent);
 }
}

focusPrevious()

void FocusHandler::focusPrevious

(

)

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 also

focusNext

Definition at line 477 of file focushandler.cpp.

References CAST_S32, distributeFocusGainedEvent(), distributeFocusLostEvent(), mFocusedWidget, and mWidgets.

{
 if (mWidgets.empty())
 {
 mFocusedWidget = nullptr;
 return;
 }

 int i;
 int focusedWidget = -1;
 const int sz = CAST_S32(mWidgets.size());
 for (i = 0; i < sz; ++ i)
 {
 if (mWidgets[i] == mFocusedWidget)
 focusedWidget = i;
 }
 const int focused = focusedWidget;

 // i is a counter that ensures that the following loop
 // won't get stuck in an infinite loop
 i = sz;
 do
 {
 -- focusedWidget;

 if (i == 0)
 {
 focusedWidget = -1;
 break;
 }

 -- i;

 if (focusedWidget <= 0)
 focusedWidget = sz - 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);
 }
}

getDraggedWidget()

Widget * FocusHandler::getDraggedWidget

(

)

const

Gets the widget being dragged. Used by the Gui class to keep track of the dragged widget.

Returns

the widget being dragged.

See also

setDraggedWidget

Definition at line 573 of file focushandler.cpp.

References mDraggedWidget.

Referenced by Gui::handleMouseMoved(), Gui::handleMousePressed(), Gui::handleMouseReleased(), Gui::handleMouseWheelMovedDown(), Gui::handleMouseWheelMovedUp(), and Gui::removeDragged().

{
 return mDraggedWidget;
}

getFocused()

Widget * FocusHandler::getFocused

(

)

const

Gets the widget with focus.

Returns

The widget with focus. NULL if no widget has focus.

Definition at line 412 of file focushandler.cpp.

References mFocusedWidget.

Referenced by Gui::getKeyEventSource(), and Gui::handleKeyInput().

{
 return mFocusedWidget;
}

getLastWidgetPressed()

Widget * FocusHandler::getLastWidgetPressed

(

)

const

Gets the last widget pressed. Used by the Gui class to keep track of pressed widgets.

Returns

The last widget pressed.

See also

setLastWidgetPressed

Definition at line 613 of file focushandler.cpp.

References mLastWidgetPressed.

Referenced by Gui::handleMouseReleased().

{
 return mLastWidgetPressed;
}

getLastWidgetWithModalFocus()

Widget * FocusHandler::getLastWidgetWithModalFocus

(

)

const

Gets the last widget with modal focus.

Returns

The last widget with modal focus.

See also

setLastWidgetWithModalFocus

Definition at line 593 of file focushandler.cpp.

References mLastWidgetWithModalFocus.

Referenced by Gui::handleModalFocus().

{
 return mLastWidgetWithModalFocus;
}

getLastWidgetWithModalMouseInputFocus()

Widget * FocusHandler::getLastWidgetWithModalMouseInputFocus

(

)

const

Gets the last widget with modal mouse input focus.

Returns

The last widget with modal mouse input focus.

See also

setLastWidgetWithModalMouseInputFocus

Definition at line 603 of file focushandler.cpp.

References mLastWidgetWithModalMouseInputFocus.

Referenced by Gui::handleModalMouseInputFocus().

{
 return mLastWidgetWithModalMouseInputFocus;
}

getLastWidgetWithMouse()

Widget * FocusHandler::getLastWidgetWithMouse

(

)

const

Gets the last widget with the mouse. Used by the Gui class to keep track the last widget with the mouse.

Returns

The last widget with the mouse.

See also

setLastWidgetWithMouse

Definition at line 583 of file focushandler.cpp.

References mLastWidgetWithMouse.

{
 return mLastWidgetWithMouse;
}

getModalFocused()

Widget * FocusHandler::getModalFocused

(

)

const

Gets the widget with modal focus.

Returns

The widget with modal focus. NULL if no widget has modal focus.

Definition at line 417 of file focushandler.cpp.

References mModalFocusedWidget.

Referenced by Gui::distributeKeyEvent(), Gui::distributeMouseEvent(), Gui::handleModalFocus(), Gui::handleMousePressed(), Widget::isModalFocused(), and InputManager::updateConditionMask().

{
 return mModalFocusedWidget;
}

getModalMouseInputFocused()

Widget * FocusHandler::getModalMouseInputFocused

(

)

const

Gets the widget with modal mouse input focus.

Returns

The widget with modal mouse input focus. NULL if no widget has modal mouse input focus.

Definition at line 422 of file focushandler.cpp.

References mModalMouseInputFocusedWidget.

Referenced by Gui::distributeKeyEvent(), Gui::distributeMouseEvent(), Gui::getMouseEventSource(), Gui::handleModalFocusGained(), Gui::handleModalMouseInputFocus(), Gui::handleMouseMoved(), and Widget::isModalMouseInputFocused().

{
 return mModalMouseInputFocusedWidget;
}

isFocused()

bool FocusHandler::isFocused

(

const Widget *const

widget

)

const

Checks if a widget is focused.

Parameters

widget

The widget to check.

Returns

True if the widget is focused, false otherwise.

See also

Widget::isFocused

Definition at line 532 of file focushandler.cpp.

References mFocusedWidget.

Referenced by Widget::isFocused(), remove(), and Window::widgetHidden().

{
 return mFocusedWidget == widget;
}

releaseModalFocus()

void FocusHandler::releaseModalFocus

(

Widget *const

widget

)

Releases modal focus if the widget has modal focus. If the widget doesn't have modal focus no relase will occur.

Parameters

widget

The widget to release modal focus for.

See also

reuqestModalFocus, Widget::releaseModalFocus

Definition at line 108 of file focushandler.cpp.

References mModalFocusedWidget, mModalStack, and requestModalFocus().

Referenced by Widget::releaseModalFocus(), and remove().

{
 mModalStack.remove(widget);

 if (mModalFocusedWidget == widget)
 {
 mModalFocusedWidget = nullptr;

 /* Check if there were any previously modal widgets that'd still like
 * to regain their modal focus.
 */
 if (!mModalStack.empty())
 {
 requestModalFocus(mModalStack.front());
 mModalStack.pop_front();
 }
 }
}

releaseModalMouseInputFocus()

void FocusHandler::releaseModalMouseInputFocus

(

const Widget *const

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.

Parameters

widget

the widget to release modal mouse input focus for.

See also

requestModalMouseInputFocus, Widget::releaseModalMouseInputFocus

Definition at line 406 of file focushandler.cpp.

References mModalMouseInputFocusedWidget.

Referenced by Widget::releaseModalMouseInputFocus().

{
 if (mModalMouseInputFocusedWidget == widget)
 mModalMouseInputFocusedWidget = nullptr;
}

remove()

void FocusHandler::remove

(

Widget *const

widget

)

Removes a widget from the focus handler.

Parameters

widget

The widget to remove.

See also

add

Definition at line 127 of file focushandler.cpp.

References FOR_EACH, isFocused(), mDraggedWidget, mFocusedWidget, mLastWidgetPressed, mLastWidgetWithModalFocus, mLastWidgetWithModalMouseInputFocus, mLastWidgetWithMouse, mWidgets, and releaseModalFocus().

Referenced by Widget::setFocusHandler().

{
 releaseModalFocus(widget);

 if (isFocused(widget))
 mFocusedWidget = nullptr;

 FOR_EACH (WidgetIterator, iter, mWidgets)
 {
 if ((*iter) == widget)
 {
 mWidgets.erase(iter);
 break;
 }
 }

 if (mDraggedWidget == widget)
 {
 mDraggedWidget = nullptr;
 return;
 }

 if (mLastWidgetWithMouse == widget)
 {
 mLastWidgetWithMouse = nullptr;
 return;
 }

 if (mLastWidgetWithModalFocus == widget)
 {
 mLastWidgetWithModalFocus = nullptr;
 return;
 }

 if (mLastWidgetWithModalMouseInputFocus == widget)
 {
 mLastWidgetWithModalMouseInputFocus = nullptr;
 return;
 }

 if (mLastWidgetPressed == widget)
 {
 mLastWidgetPressed = nullptr;
 return;
 }
}

requestFocus()

void FocusHandler::requestFocus

(

const Widget *const

widget

)

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.

Parameters

widget

The widget to request focus for.

See also

isFocused, Widget::requestFocus

Definition at line 359 of file focushandler.cpp.

References CAST_U32, distributeFocusGainedEvent(), distributeFocusLostEvent(), mFocusedWidget, and mWidgets.

Referenced by ListBox::refocus(), and Widget::requestFocus().

{
 if ((widget == nullptr) || widget == mFocusedWidget)
 return;

 int toBeFocusedIndex = -1;
 for (unsigned int i = 0, fsz = CAST_U32(
 mWidgets.size()); i < fsz; ++i)
 {
 if (mWidgets[i] == widget)
 {
 toBeFocusedIndex = i;
 break;
 }
 }

 if (toBeFocusedIndex < 0)
 return;

 Widget *const oldFocused = mFocusedWidget;

 if (oldFocused != widget)
 {
 mFocusedWidget = mWidgets.at(toBeFocusedIndex);

 Event focusEvent(mFocusedWidget);
 distributeFocusGainedEvent(focusEvent);

 if (oldFocused != nullptr)
 {
 Event oldFocusEvent(oldFocused);
 distributeFocusLostEvent(oldFocusEvent);
 }
 }
}

requestModalFocus()

void FocusHandler::requestModalFocus

(

Widget *const

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.

Parameters

widget

The widget to request modal focus for.

Exceptions

Exception

when another widget already has modal focus.

See also

releaseModalFocus, Widget::requestModalFocus

Definition at line 92 of file focushandler.cpp.

References focusNone(), Widget::isModalFocused(), mFocusedWidget, mModalFocusedWidget, and mModalStack.

Referenced by releaseModalFocus(), and Widget::requestModalFocus().

{
 /* If there is another widget with modal focus, remove its modal focus
 * and put it on the modal widget stack.
 */
 if ((mModalFocusedWidget != nullptr) && mModalFocusedWidget != widget)
 {
 mModalStack.push_front(mModalFocusedWidget);
 mModalFocusedWidget = nullptr;
 }

 mModalFocusedWidget = widget;
 if ((mFocusedWidget != nullptr) && !mFocusedWidget->isModalFocused())
 focusNone();
}

requestModalMouseInputFocus()

void FocusHandler::requestModalMouseInputFocus

(

Widget *const

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.

Parameters

widget

The widget to focus for modal mouse input focus.

Exceptions

Exception

when another widget already has modal mouse input focus.

See also

releaseModalMouseInputFocus, Widget::requestModalMouseInputFocus

Definition at line 395 of file focushandler.cpp.

References mModalMouseInputFocusedWidget.

Referenced by Widget::requestModalMouseInputFocus().

{
 if ((mModalMouseInputFocusedWidget != nullptr)
 && mModalMouseInputFocusedWidget != widget)
 {
 return;
 }

 mModalMouseInputFocusedWidget = widget;
}

setDraggedWidget()

void FocusHandler::setDraggedWidget

(

Widget *const

draggedWidget

)

Sets the widget being dragged. Used by the Gui class to keep track of the dragged widget.

Parameters

draggedWidget

The widget being dragged.

See also

getDraggedWidget

Definition at line 578 of file focushandler.cpp.

References mDraggedWidget.

Referenced by Gui::handleMousePressed(), Gui::handleMouseReleased(), and Gui::removeDragged().

{
 mDraggedWidget = draggedWidget;
}

setLastWidgetPressed()

void FocusHandler::setLastWidgetPressed

(

Widget *const

lastWidgetPressed

)

Sets the last widget pressed. Used by the Gui class to keep track of pressed widgets.

Parameters

lastWidgetPressed

The last widget pressed.

See also

getLastWidgetPressed

Definition at line 618 of file focushandler.cpp.

References mLastWidgetPressed.

Referenced by Gui::handleMousePressed(), and Gui::handleMouseReleased().

{
 mLastWidgetPressed = lastWidgetPressed;
}

setLastWidgetWithModalFocus()

void FocusHandler::setLastWidgetWithModalFocus

(

Widget *const

widget

)

Sets the last widget with modal focus.

Parameters

widget

The last widget with modal focus.

See also

getLastWidgetWithModalFocus

Definition at line 598 of file focushandler.cpp.

References mLastWidgetWithModalFocus.

Referenced by Gui::handleModalFocus().

{
 mLastWidgetWithModalFocus = widget;
}

setLastWidgetWithModalMouseInputFocus()

void FocusHandler::setLastWidgetWithModalMouseInputFocus

(

Widget *const

widget

)

Sets the last widget with modal mouse input focus.

Parameters

widget

The last widget with modal mouse input focus.

See also

getLastWidgetWithModalMouseInputFocus

Definition at line 608 of file focushandler.cpp.

References mLastWidgetWithModalMouseInputFocus.

Referenced by Gui::handleModalFocusGained(), and Gui::handleModalMouseInputFocus().

{
 mLastWidgetWithModalMouseInputFocus = widget;
}

setLastWidgetWithMouse()

void FocusHandler::setLastWidgetWithMouse

(

Widget *const

lastWidgetWithMouse

)

Sets the last widget with the mouse. Used by the Gui class to keep track the last widget with the mouse.

Parameters

lastWidgetWithMouse

The last widget with the mouse.

See also

getLastWidgetWithMouse

Definition at line 588 of file focushandler.cpp.

References mLastWidgetWithMouse.

{
 mLastWidgetWithMouse = lastWidgetWithMouse;
}

tabNext()

void FocusHandler::tabNext

(

)

Focuses the next widget which allows tabbing in unless the current focused Widget disallows tabbing out.

See also

tabPrevious

Definition at line 174 of file focushandler.cpp.

References CAST_S32, checkForWindow(), distributeFocusGainedEvent(), distributeFocusLostEvent(), Widget::isFocusable(), Widget::isModalFocused(), Widget::isTabInEnabled(), Widget::isTabOutEnabled(), mFocusedWidget, mModalFocusedWidget, and mWidgets.

Referenced by Gui::handleKeyInput().

{
 if (mFocusedWidget != nullptr)
 {
 if (!mFocusedWidget->isTabOutEnabled())
 return;
 }

 if (mWidgets.empty())
 {
 mFocusedWidget = nullptr;
 return;
 }

 int i;
 int focusedWidget = -1;
 const int sz = CAST_S32(mWidgets.size());
 for (i = 0; i < sz; ++ i)
 {
 if (mWidgets[i] == mFocusedWidget)
 focusedWidget = i;
 }
 const 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 = sz;
 do
 {
 ++ focusedWidget;

 if (i == 0)
 {
 focusedWidget = -1;
 break;
 }

 -- i;

 if (focusedWidget >= sz)
 focusedWidget = 0;

 if (focusedWidget == focused)
 return;

 const Widget *const widget = mWidgets.at(focusedWidget);
 if (widget->isFocusable() && widget->isTabInEnabled() &&
 ((mModalFocusedWidget == nullptr) || widget->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);
 }

 checkForWindow();
}

tabPrevious()

void FocusHandler::tabPrevious

(

)

Focuses the previous widget which allows tabbing in unless current focused widget disallows tabbing out.

See also

tabNext

Definition at line 245 of file focushandler.cpp.

References CAST_S32, checkForWindow(), distributeFocusGainedEvent(), distributeFocusLostEvent(), Widget::isFocusable(), Widget::isModalFocused(), Widget::isTabInEnabled(), Widget::isTabOutEnabled(), mFocusedWidget, mModalFocusedWidget, and mWidgets.

Referenced by Gui::handleKeyInput().

{
 if (mFocusedWidget != nullptr)
 {
 if (!mFocusedWidget->isTabOutEnabled())
 return;
 }

 if (mWidgets.empty())
 {
 mFocusedWidget = nullptr;
 return;
 }

 int i;
 int focusedWidget = -1;
 const int sz = CAST_S32(mWidgets.size());
 for (i = 0; i < sz; ++ i)
 {
 if (mWidgets[i] == mFocusedWidget)
 focusedWidget = i;
 }
 const 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 = sz;
 do
 {
 -- focusedWidget;

 if (i == 0)
 {
 focusedWidget = -1;
 break;
 }

 -- i;

 if (focusedWidget <= 0)
 focusedWidget = sz - 1;

 if (focusedWidget == focused)
 return;

 const Widget *const widget = mWidgets.at(focusedWidget);
 if (widget->isFocusable() && widget->isTabInEnabled() &&
 ((mModalFocusedWidget == nullptr) || widget->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);
 }

 checkForWindow();
}

Field Documentation

mDraggedWidget

Widget* FocusHandler::mDraggedWidget

private

Holds the dragged widget. NULL if no widget is being dragged.

Definition at line 382 of file focushandler.h.

Referenced by getDraggedWidget(), remove(), and setDraggedWidget().

mFocusedWidget

Widget* FocusHandler::mFocusedWidget

private

Holds the focused widget. NULL if no widget has focus.

Definition at line 364 of file focushandler.h.

Referenced by checkForWindow(), focusNext(), focusNone(), focusPrevious(), getFocused(), isFocused(), remove(), requestFocus(), requestModalFocus(), tabNext(), and tabPrevious().

mLastWidgetPressed

Widget* FocusHandler::mLastWidgetPressed

private

Holds the last widget pressed.

Definition at line 402 of file focushandler.h.

Referenced by getLastWidgetPressed(), remove(), and setLastWidgetPressed().

mLastWidgetWithModalFocus

Widget* FocusHandler::mLastWidgetWithModalFocus

private

Holds the last widget with modal focus.

Definition at line 392 of file focushandler.h.

Referenced by getLastWidgetWithModalFocus(), remove(), and setLastWidgetWithModalFocus().

mLastWidgetWithModalMouseInputFocus

Widget* FocusHandler::mLastWidgetWithModalMouseInputFocus

private

Holds the last widget with modal mouse input focus.

Definition at line 397 of file focushandler.h.

Referenced by getLastWidgetWithModalMouseInputFocus(), remove(), and setLastWidgetWithModalMouseInputFocus().

mLastWidgetWithMouse

Widget* FocusHandler::mLastWidgetWithMouse

private

Holds the last widget with the mouse.

Definition at line 387 of file focushandler.h.

Referenced by getLastWidgetWithMouse(), remove(), and setLastWidgetWithMouse().

mModalFocusedWidget

Widget* FocusHandler::mModalFocusedWidget

private

Holds the modal focused widget. NULL if no widget has modal focused.

Definition at line 370 of file focushandler.h.

Referenced by getModalFocused(), releaseModalFocus(), requestModalFocus(), tabNext(), and tabPrevious().

mModalMouseInputFocusedWidget

Widget* FocusHandler::mModalMouseInputFocusedWidget

private

Holds the modal mouse input focused widget. NULL if no widget is being dragged.

Definition at line 376 of file focushandler.h.

Referenced by getModalMouseInputFocused(), releaseModalMouseInputFocus(), and requestModalMouseInputFocus().

mModalStack

std::list<Widget*> FocusHandler::mModalStack

private

Stack of widgets that have requested modal forcus.

Definition at line 407 of file focushandler.h.

Referenced by releaseModalFocus(), and requestModalFocus().

mWidgets

WidgetVector FocusHandler::mWidgets

private

Holds the widgets currently being handled by the focus handler.

Definition at line 359 of file focushandler.h.

Referenced by add(), focusNext(), focusPrevious(), remove(), requestFocus(), tabNext(), and tabPrevious().

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The documentation for this class was generated from the following files:

• src/gui/focushandler.h (fa4a324)
• src/gui/focushandler.cpp (fa4a324)