Overlay QML Type

A window overlay for popups. 更多...

import 语句：	import QtQuick.Controls 2.2
Since:	Qt 5.10
继承：	Item

所有成员列表，包括继承成员

附加特性

modal : Component
modeless : Component
overlay : Overlay

附加信号

pressed ()
released ()

详细描述

Overlay provides a layer for popups, ensuring that popups are displayed above other content and that the background is dimmed when a modal or dimmed popup is visible.

The overlay is an ordinary Item that covers the entire window. It can be used as a visual parent to position a popup in scene coordinates.

The following example uses the attached Overlay.overlay property to position a popup in the center of the window, despite the position of the button that opens the popup:

Button {
    onClicked: popup.open()
    Popup {
        id: popup
        parent: Overlay.overlay
        x: Math.round((parent.width - width) / 2)
        y: Math.round((parent.height - height) / 2)
        width: 100
        height: 100
    }
}

另请参阅 ApplicationWindow .

附加特性文档编制

This attached property holds a component to use as a visual item that implements background dimming for modal popups. It is created for and stacked below visible modal popups.

The property can be attached to any popup.

For example, to change the color of the background dimming for a modal popup, the following code can be used:

Popup {
    id: popup
    width: 400
    height: 400
    modal: true
    visible: true
    Overlay.modal: Rectangle {
        color: "#aacfdbe7"
    }
}

另请参阅 Popup::modal .

Overlay.modeless : Component

This attached property holds a component to use as a visual item that implements background dimming for modeless popups. It is created for and stacked below visible dimming popups.

The property can be attached to any popup.

For example, to change the color of the background dimming for a modeless popup, the following code can be used:

Popup {
    id: popup
    width: 400
    height: 400
    dim: true
    visible: true
    Overlay.modeless: Rectangle {
        color: "#aacfdbe7"
    }
}

另请参阅 Popup::dim .

[read-only] Overlay.overlay : Overlay

This attached property holds the window overlay item.

The property can be attached to any item, popup, or window. When attached to an item or a popup, the value is null if the item or popup is not in a window.

附加信号文档编制

pressed ()

This attached signal is emitted when the overlay is pressed by the user while a popup is visible.

The signal can be attached to any item, popup, or window. When attached to an item or a popup, the signal is only emitted if the item or popup is in a window.

注意： 相应处理程序是 onPressed .

released ()

This attached signal is emitted when the overlay is released by the user while a popup is visible.

The signal can be attached to any item, popup, or window. When attached to an item or a popup, the signal is only emitted if the item or popup is in a window.

注意： 相应处理程序是 onReleased .