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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This class is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.

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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