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QWinTaskbarButton Class

The QWinTaskbarButton class represents the Windows taskbar button for a top-level window (Windows 7 and newer). More...

Header: #include <QWinTaskbarButton>
qmake: QT += winextras
Since: Qt 5.2
Inherits: QObject

This class was introduced in Qt 5.2.

Properties

Public Functions

QWinTaskbarButton(QObject *parent = nullptr)
virtual ~QWinTaskbarButton()
QString overlayAccessibleDescription() const
QIcon overlayIcon() const
QWinTaskbarProgress *progress() const
void setWindow(QWindow *window)
QWindow *window() const

Public Slots

void clearOverlayIcon()
void setOverlayAccessibleDescription(const QString &description)
void setOverlayIcon(const QIcon &icon)

Detailed Description

The QWinTaskbarButton class enables you to set overlay icons on a taskbar button, and provides access to its progress indicator.

An overlay icon indicates change in the state of an application, whereas a progress indicator shows how time-consuming tasks are progressing.

Taskbar Button

The following example code illustrates how to use the QWinTaskbarButton and QWinTaskbarProgress classes to adjust the look of the taskbar button:

    QWinTaskbarButton *button = new QWinTaskbarButton(widget);
    button->setWindow(widget->windowHandle());
    button->setOverlayIcon(QIcon(":/loading.png"));

    QWinTaskbarProgress *progress = button->progress();
    progress->setVisible(true);
    progress->setValue(50);

Note: QWidget::windowHandle() returns a valid instance of a QWindow only after the widget has been shown. It is therefore recommended to delay the initialization of the QWinTaskbarButton instances until QWidget::showEvent().

Note: The class wraps API only available since Windows 7. Instantiating it on Windows XP or Windows Vista causes a runtime warning.

See also QWinTaskbarProgress.

Property Documentation

overlayAccessibleDescription : QString

This property holds the description of the overlay for accessibility purposes

Access functions:

QString overlayAccessibleDescription() const
void setOverlayAccessibleDescription(const QString &description)

See also overlayIcon.

overlayIcon : QIcon

This property holds the overlay icon of the taskbar button

Access functions:

QIcon overlayIcon() const
void setOverlayIcon(const QIcon &icon)
void clearOverlayIcon()

progress : QWinTaskbarProgress* const

This property holds the progress indicator of the taskbar button

Note: The progress indicator is not visible by default.

Access functions:

QWinTaskbarProgress *progress() const

window : QWindow*

This property holds the window whose taskbar button is manipulated

Access functions:

QWindow *window() const
void setWindow(QWindow *window)

Member Function Documentation

QWinTaskbarButton::QWinTaskbarButton(QObject *parent = nullptr)

Constructs a QWinTaskbarButton with the specified parent.

If parent is an instance of QWindow, it is automatically assigned as the taskbar button's window.

[virtual] QWinTaskbarButton::~QWinTaskbarButton()

Destroys the QWinTaskbarButton.

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