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Diffstat (limited to 'src/widgets/accessible/qaccessibleobject.cpp')
| -rw-r--r-- | src/widgets/accessible/qaccessibleobject.cpp | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/src/widgets/accessible/qaccessibleobject.cpp b/src/widgets/accessible/qaccessibleobject.cpp new file mode 100644 index 0000000000..20f3a15bb4 --- /dev/null +++ b/src/widgets/accessible/qaccessibleobject.cpp @@ -0,0 +1,408 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qaccessibleobject.h" + +#ifndef QT_NO_ACCESSIBILITY + +#include "qapplication.h" +#include "qwidget.h" +#include "qpointer.h" +#include "qmetaobject.h" +#include "qvarlengtharray.h" + +QT_BEGIN_NAMESPACE + +class QAccessibleObjectPrivate +{ +public: + QPointer<QObject> object; + + QList<QByteArray> actionList() const; +}; + +QList<QByteArray> QAccessibleObjectPrivate::actionList() const +{ + QList<QByteArray> actionList; + + if (!object) + return actionList; + + const QMetaObject *mo = object->metaObject(); + Q_ASSERT(mo); + + QByteArray defaultAction = QMetaObject::normalizedSignature( + mo->classInfo(mo->indexOfClassInfo("DefaultSlot")).value()); + + for (int i = 0; i < mo->methodCount(); ++i) { + const QMetaMethod member = mo->method(i); + if (member.methodType() != QMetaMethod::Slot && member.access() != QMetaMethod::Public) + continue; + + if (!qstrcmp(member.tag(), "QACCESSIBLE_SLOT")) { + if (member.signature() == defaultAction) + actionList.prepend(defaultAction); + else + actionList << member.signature(); + } + } + + return actionList; +} + +/*! + \class QAccessibleObject + \brief The QAccessibleObject class implements parts of the + QAccessibleInterface for QObjects. + + \ingroup accessibility + + This class is mainly provided for convenience. All subclasses of + the QAccessibleInterface that provide implementations of non-widget objects + should use this class as their base class. + + \sa QAccessible, QAccessibleWidget +*/ + +/*! + Creates a QAccessibleObject for \a object. +*/ +QAccessibleObject::QAccessibleObject(QObject *object) +{ + d = new QAccessibleObjectPrivate; + d->object = object; +} + +/*! + Destroys the QAccessibleObject. + + This only happens when a call to release() decrements the internal + reference counter to zero. +*/ +QAccessibleObject::~QAccessibleObject() +{ + delete d; +} + +/*! + \reimp +*/ +QObject *QAccessibleObject::object() const +{ +#ifndef QT_NO_DEBUG + if (!d->object) + qWarning("QAccessibleInterface is invalid. Crash pending..."); +#endif + return d->object; +} + +/*! + \reimp +*/ +bool QAccessibleObject::isValid() const +{ + return !d->object.isNull(); +} + +/*! \reimp */ +QRect QAccessibleObject::rect(int) const +{ + return QRect(); +} + +/*! \reimp */ +void QAccessibleObject::setText(Text, int, const QString &) +{ +} + +/*! \reimp */ +int QAccessibleObject::userActionCount(int) const +{ + return 0; +} + +/*! \reimp */ +bool QAccessibleObject::doAction(int, int, const QVariantList &) +{ + return false; +} + +static const char * const action_text[][5] = +{ + // Name, Description, Value, Help, Accelerator + { "Press", "", "", "", "Space" }, + { "SetFocus", "Passes focus to this widget", "", "", "" }, + { "Increase", "", "", "", "" }, + { "Decrease", "", "", "", "" }, + { "Accept", "", "", "", "" }, + { "Cancel", "", "", "", "" }, + { "Select", "", "", "", "" }, + { "ClearSelection", "", "", "", "" }, + { "RemoveSelection", "", "", "", "" }, + { "ExtendSelection", "", "", "", "" }, + { "AddToSelection", "", "", "", "" } +}; + +/*! \reimp */ +QString QAccessibleObject::actionText(int action, Text t, int child) const +{ + if (child || action > FirstStandardAction || action < LastStandardAction || t > Accelerator) + return QString(); + + return QString::fromLatin1(action_text[-(action - FirstStandardAction)][t]); +} + + +/*! + \class QAccessibleApplication + \brief The QAccessibleApplication class implements the QAccessibleInterface for QApplication. + + \internal + + \ingroup accessibility +*/ + +/*! + Creates a QAccessibleApplication for the QApplication object referenced by qApp. +*/ +QAccessibleApplication::QAccessibleApplication() +: QAccessibleObject(qApp) +{ +} + +// all toplevel widgets except popups and the desktop +static QWidgetList topLevelWidgets() +{ + QWidgetList list; + const QWidgetList tlw(QApplication::topLevelWidgets()); + for (int i = 0; i < tlw.count(); ++i) { + QWidget *w = tlw.at(i); + if (!(w->windowType() == Qt::Popup) && !(w->windowType() == Qt::Desktop)) + list.append(w); + } + + return list; +} + +/*! \reimp */ +int QAccessibleApplication::childCount() const +{ + return topLevelWidgets().count(); +} + +/*! \reimp */ +int QAccessibleApplication::indexOfChild(const QAccessibleInterface *child) const +{ + if (!child->object()->isWidgetType()) + return -1; + + const QWidgetList tlw(topLevelWidgets()); + int index = tlw.indexOf(static_cast<QWidget*>(child->object())); + if (index != -1) + ++index; + return index; +} + +/*! \reimp */ +int QAccessibleApplication::childAt(int x, int y) const +{ + const QWidgetList tlw(topLevelWidgets()); + for (int i = 0; i < tlw.count(); ++i) { + QWidget *w = tlw.at(i); + if (w->frameGeometry().contains(x,y)) + return i+1; + } + return -1; +} + +/*! \reimp */ +QAccessible::Relation QAccessibleApplication::relationTo(int child, const + QAccessibleInterface *other, int otherChild) const +{ + QObject *o = other ? other->object() : 0; + if (!o) + return Unrelated; + + if(o == object()) { + if (child && !otherChild) + return Child; + if (!child && otherChild) + return Ancestor; + if (!child && !otherChild) + return Self; + } + + QWidgetList tlw(topLevelWidgets()); + if (tlw.contains(qobject_cast<QWidget*>(o))) + return Ancestor; + + for (int i = 0; i < tlw.count(); ++i) { + QWidget *w = tlw.at(i); + QObjectList cl = w->findChildren<QObject *>(QString()); + if (cl.contains(o)) + return Ancestor; + } + + return Unrelated; +} + +/*! \reimp */ +int QAccessibleApplication::navigate(RelationFlag relation, int entry, + QAccessibleInterface **target) const +{ + if (!target) + return -1; + + *target = 0; + QObject *targetObject = 0; + + switch (relation) { + case Self: + targetObject = object(); + break; + case Child: + if (entry > 0 && entry <= childCount()) { + const QWidgetList tlw(topLevelWidgets()); + if (tlw.count() >= entry) + targetObject = tlw.at(entry-1); + } else { + return -1; + } + break; + case FocusChild: + targetObject = QApplication::activeWindow(); + break; + default: + break; + } + *target = QAccessible::queryAccessibleInterface(targetObject); + return *target ? 0 : -1; +} + +/*! \reimp */ +QString QAccessibleApplication::text(Text t, int) const +{ + switch (t) { + case Name: + return QApplication::applicationName(); + case Description: + return QApplication::applicationFilePath(); + default: + break; + } + return QString(); +} + +/*! \reimp */ +QAccessible::Role QAccessibleApplication::role(int) const +{ + return Application; +} + +/*! \reimp */ +QAccessible::State QAccessibleApplication::state(int) const +{ + return QApplication::activeWindow() ? Focused : Normal; +} + +/*! \reimp */ +int QAccessibleApplication::userActionCount(int) const +{ + return 1; +} + +/*! \reimp */ +bool QAccessibleApplication::doAction(int action, int child, const QVariantList ¶m) +{ + if (action == 0 || action == 1) { + QWidget *w = 0; + w = QApplication::activeWindow(); + if (!w) + w = topLevelWidgets().at(0); + if (!w) + return false; + w->activateWindow(); + return true; + } + return QAccessibleObject::doAction(action, child, param); +} + +/*! \reimp */ +QString QAccessibleApplication::actionText(int action, Text text, int child) const +{ + QString str; + if ((action == 0 || action == 1) && !child) switch (text) { + case Name: + return QApplication::tr("Activate"); + case Description: + return QApplication::tr("Activates the program's main window"); + default: + break; + } + return QAccessibleObject::actionText(action, text, child); +} + +// ### Qt 5: remove me - binary compatibility hack +QAccessibleObjectEx::QAccessibleObjectEx(QObject *object) +{ + d = new QAccessibleObjectPrivate; + d->object = object; +} +bool QAccessibleObjectEx::isValid() const +{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::isValid(); } +QObject *QAccessibleObjectEx::object() const +{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::object(); } +QRect QAccessibleObjectEx::rect(int child) const +{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::rect(child); } +void QAccessibleObjectEx::setText(Text t, int child, const QString &text) +{ reinterpret_cast<QAccessibleObject *>(this)->QAccessibleObject::setText(t, child, text); } +int QAccessibleObjectEx::userActionCount(int child) const +{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::userActionCount(child); } +bool QAccessibleObjectEx::doAction(int action, int child, const QVariantList ¶ms) +{ return reinterpret_cast<QAccessibleObject *>(this)->QAccessibleObject::doAction(action, child, params); } +QString QAccessibleObjectEx::actionText(int action, Text t, int child) const +{ return reinterpret_cast<const QAccessibleObject *>(this)->QAccessibleObject::actionText(action, t, child); } +QAccessibleObjectEx::~QAccessibleObjectEx() +{ delete d; } + +QT_END_NAMESPACE + +#endif //QT_NO_ACCESSIBILITY |