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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the documentation of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| |
| //! [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 QVariant::fromValue(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()); |
| } |