--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/accessibilityslidersnippet.cpp Thu Apr 08 14:19:33 2010 +0300
@@ -0,0 +1,262 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+//! [0]
+QAccessibleSlider::QAccessibleSlider(QWidget *w)
+: QAccessibleAbstractSlider(w)
+{
+ Q_ASSERT(slider());
+ addControllingSignal(QLatin1String("valueChanged(int)"));
+}
+//! [0]
+
+QSlider *QAccessibleSlider::slider() const
+{
+ return qobject_cast<QSlider*>(object());
+}
+
+//! [1]
+QRect QAccessibleSlider::rect(int child) const
+{
+//! [1]
+ QRect rect;
+ if (!slider()->isVisible())
+ return rect;
+ const QStyleOptionSlider option = qt_qsliderStyleOption(slider());
+ QRect srect = slider()->style()->subControlRect(QStyle::CC_Slider, &option,
+ QStyle::SC_SliderHandle, slider());
+
+//! [2]
+ switch (child) {
+ case PageLeft:
+ if (slider()->orientation() == Qt::Vertical)
+ rect = QRect(0, 0, slider()->width(), srect.y());
+ else
+ rect = QRect(0, 0, srect.x(), slider()->height());
+ break;
+ case Position:
+ rect = srect;
+ break;
+ case PageRight:
+ if (slider()->orientation() == Qt::Vertical)
+ rect = QRect(0, srect.y() + srect.height(), slider()->width(), slider()->height()- srect.y() - srect.height());
+ else
+ rect = QRect(srect.x() + srect.width(), 0, slider()->width() - srect.x() - srect.width(), slider()->height());
+ break;
+ default:
+ return QAccessibleAbstractSlider::rect(child);
+ }
+//! [2] //! [3]
+
+ QPoint tp = slider()->mapToGlobal(QPoint(0,0));
+ return QRect(tp.x() + rect.x(), tp.y() + rect.y(), rect.width(), rect.height());
+}
+//! [3]
+
+int QAccessibleSlider::childCount() const
+{
+ if (!slider()->isVisible())
+ return 0;
+ return PageRight;
+}
+
+//! [4]
+QString QAccessibleSlider::text(Text t, int child) const
+{
+ if (!slider()->isVisible())
+ return QString();
+ switch (t) {
+ case Value:
+ if (!child || child == 2)
+ return QString::number(slider()->value());
+ return QString();
+ case Name:
+ switch (child) {
+ case PageLeft:
+ return slider()->orientation() == Qt::Horizontal ?
+ QSlider::tr("Page left") : QSlider::tr("Page up");
+ case Position:
+ return QSlider::tr("Position");
+ case PageRight:
+ return slider()->orientation() == Qt::Horizontal ?
+ QSlider::tr("Page right") : QSlider::tr("Page down");
+ }
+ break;
+ default:
+ break;
+ }
+ return QAccessibleAbstractSlider::text(t, child);
+}
+//! [4]
+
+//! [5]
+QAccessible::Role QAccessibleSlider::role(int child) const
+{
+ switch (child) {
+ case PageLeft:
+ case PageRight:
+ return PushButton;
+ case Position:
+ return Indicator;
+ default:
+ return Slider;
+ }
+}
+//! [5]
+
+//! [6]
+QAccessible::State QAccessibleSlider::state(int child) const
+{
+ const State parentState = QAccessibleAbstractSlider::state(0);
+//! [6]
+
+ if (child == 0)
+ return parentState;
+
+ // Inherit the Invisible state from parent.
+ State state = parentState & QAccessible::Invisible;
+
+ // Disable left/right if we are at the minimum/maximum.
+ const QSlider * const slider = QAccessibleSlider::slider();
+//! [7]
+ switch (child) {
+ case PageLeft:
+ if (slider->value() <= slider->minimum())
+ state |= Unavailable;
+ break;
+ case PageRight:
+ if (slider->value() >= slider->maximum())
+ state |= Unavailable;
+ break;
+ case Position:
+ default:
+ break;
+ }
+
+ return state;
+}
+//! [7]
+
+int QAccessibleSlider::defaultAction(int child) const
+{
+ switch (child) {
+ case SliderSelf:
+ return SetFocus;
+ case PageLeft:
+ return Press;
+ case PageRight:
+ return Press;
+ }
+
+ return 0;
+}
+
+// Name, Description, Value, Help, Accelerator
+static const char * const actionTexts[][5] =
+{
+ {"Press", "Decreases the value of the slider", "", "", "Ctrl+L"},
+ {"Press", "Increaces the value of the slider", "", "", "Ctrl+R"}
+};
+
+QString QAccessibleSlider::actionText(int action, Text text, int child) const
+{
+ if (action != Press || child < 1 || child > 2)
+ return QAccessibleAbstractSlider::actionText(action, text, child);
+
+ return actionTexts[child - 1][t];
+}
+
+bool QAccessibleSlider::doAction(int action, int child)
+{
+ if (action != Press || child < 1 || child > 2)
+ return false;
+
+ if (child == PageLeft)
+ slider()->setValue(slider()->value() - slider()->pageStep());
+ else
+ slider()->setValue(slider()->value() + slider()->pageStep());
+}
+
+QAccessibleAbstractSlider::QAccessibleAbstractSlider(QWidget *w, Role r)
+ : QAccessibleWidgetEx(w, r)
+{
+ Q_ASSERT(qobject_cast<QAbstractSlider *>(w));
+}
+
+QVariant QAccessibleAbstractSlider::invokeMethodEx(Method method, int child, const QVariantList ¶ms)
+{
+ switch (method) {
+ case ListSupportedMethods: {
+ QSet<QAccessible::Method> set;
+ set << ListSupportedMethods;
+ return qVariantFromValue(set | qvariant_cast<QSet<QAccessible::Method> >(
+ QAccessibleWidgetEx::invokeMethodEx(method, child, params)));
+ }
+ default:
+ return QAccessibleWidgetEx::invokeMethodEx(method, child, params);
+ }
+}
+
+QVariant QAccessibleAbstractSlider::currentValue()
+{
+ return abstractSlider()->value();
+}
+
+void QAccessibleAbstractSlider::setCurrentValue(const QVariant &value)
+{
+ abstractSlider()->setValue(value.toInt());
+}
+
+QVariant QAccessibleAbstractSlider::maximumValue()
+{
+ return abstractSlider()->maximum();
+}
+
+QVariant QAccessibleAbstractSlider::minimumValue()
+{
+ return abstractSlider()->minimum();
+}
+
+QAbstractSlider *QAccessibleAbstractSlider::abstractSlider() const
+{
+ return static_cast<QAbstractSlider *>(object());
+}