内容

特性
附加特性
信号
方法
详细描述

Window QML 类型

创建新的顶层窗口更多...

import 语句：	import QtQuick.Window 2.2
实例化：	QQuickWindow
继承者：	ApplicationWindow

所有成员列表，包括继承成员

特性

active : bool
activeFocusItem : Item
color : color
contentItem : Item
contentOrientation : Qt::ScreenOrientation
data : list<Object>
flags : Qt::WindowFlags
height : int
maximumHeight : int
maximumWidth : int
minimumHeight : int
minimumWidth : int
modality : Qt::WindowModality
opacity : real
screen : variant
title : string
visibility : QWindow::Visibility
visible : bool
width : int
x : int
y : int

附加特性

active : bool
activeFocusItem : Item
contentItem : Item
height : int
visibility : QWindow::Visibility
width : int
window : Window

信号

void closing (CloseEvent close )

方法

alert (int msec )
close ()
hide ()
lower ()
raise ()
requestActivate ()
show ()
showFullScreen ()
showMaximized ()
showMinimized ()
showNormal ()

详细描述

The Window object creates a new top-level window for a Qt Quick scene. It automatically sets up the window for use with QtQuick 2.x graphical types.

To use this type, you will need to import the module with the following line:

import QtQuick.Window 2.2

Omitting this import will allow you to have a QML environment without access to window system features.

A Window can be declared inside an Item or inside another Window; in that case the inner Window will automatically become "transient for" the outer Window: that is, most platforms will show it centered upon the outer window by default, and there may be other platform-dependent behaviors, depending also on the flags . If the nested window is intended to be a dialog in your application, you should also set flags to Qt.Dialog, because some window managers will not provide the centering behavior without that flag. You can also declare multiple windows inside a top-level QtObject , in which case the windows will have no transient relationship.

Alternatively you can set or bind x and y to position the Window explicitly on the screen.

When the user attempts to close a window, the closing signal will be emitted. You can force the window to stay open (for example to prompt the user to save changes) by writing an onClosing handler and setting close.accepted = false .

特性文档编制

active : bool

The active status of the window.

该 QML 特性在 Qt 5.1 引入。

另请参阅 requestActivate() .

activeFocusItem : Item

The item which currently has active focus or null 若没有项具有活动聚焦。

该 QML 特性在 Qt 5.1 引入。

color : color

The background color for the window.

Setting this property is more efficient than using a separate Rectangle.

[read-only] contentItem : Item

The invisible root item of the scene.

contentOrientation : Qt::ScreenOrientation

这是窗口管理器的提示，若它需要显示相关窗口的额外内容 (像：弹出窗口、对话框、状态栏或类似的)。

推荐取向为 Screen.orientation , but an application doesn't have to support all possible orientations, and thus can opt to ignore the current screen orientation.

窗口和内容取向之间的差异，确定内容的旋转量。

默认值为 Qt::PrimaryOrientation .

该 QML 特性在 Qt 5.1 引入。

另请参阅 Screen .

[default] data : list < 对象 >

The data property allows you to freely mix visual children, resources and other Windows in a Window.

If you assign another Window to the data list, the nested window will become "transient for" the outer Window.

If you assign an Item to the data list, it becomes a child of the Window's contentItem , so that it appears inside the window. The item's parent will be the window's contentItem , which is the root of the Item ownership tree within that Window.

If you assign any other object type, it is added as a resource.

It should not generally be necessary to refer to the data property, as it is the default property for Window and thus all child items are automatically assigned to this property.

另请参阅 QWindow::transientParent() .

flags : Qt::WindowFlags

The window flags of the window.

The window flags control the window's appearance in the windowing system, whether it's a dialog, popup, or a regular window, and whether it should have a title bar, etc.

The flags which you read from this property might differ from the ones that you set if the requested flags could not be fulfilled.

另请参阅 Qt::WindowFlags .

height : int

Defines the window's position and size.

(x, y) 位置相对于 Screen if there is only one, or to the virtual desktop (arrangement of multiple screens).

Window { x: 100; y: 100; width: 100; height: 100 }

maximumHeight : int

Defines the window's maximum size.

This is a hint to the window manager to prevent resizing above the specified width and height.

该 QML 特性在 Qt 5.1 引入。

maximumWidth : int

Defines the window's maximum size.

This is a hint to the window manager to prevent resizing above the specified width and height.

该 QML 特性在 Qt 5.1 引入。

minimumHeight : int

Defines the window's minimum size.

This is a hint to the window manager to prevent resizing below the specified width and height.

该 QML 特性在 Qt 5.1 引入。

minimumWidth : int

Defines the window's minimum size.

This is a hint to the window manager to prevent resizing below the specified width and height.

该 QML 特性在 Qt 5.1 引入。

modality : Qt::WindowModality

The modality of the window.

A modal window prevents other windows from receiving input events. Possible values are Qt.NonModal (the default), Qt.WindowModal, and Qt.ApplicationModal.

opacity : real

The opacity of the window.

If the windowing system supports window opacity, this can be used to fade the window in and out, or to make it semitransparent.

A value of 1.0 or above is treated as fully opaque, whereas a value of 0.0 or below is treated as fully transparent. Values inbetween represent varying levels of translucency between the two extremes.

默认值为 1.0。

该 QML 特性在 Qt 5.1 引入。

screen : variant

The screen with which the window is associated.

If specified before showing a window, will result in the window being shown on that screen, unless an explicit window position has been set. The value must be an element from the Qt.application.screens array.

注意： To ensure that the window is associated with the desired screen when the underlying native window is created, make sure this property is set as early as possible and that the setting of its value is not deferred. This can be particularly important on embedded platforms without a windowing system, where only one window per screen is allowed at a time. Setting the screen after a window has been created does not move the window if the new screen is part of the same virtual desktop as the old screen.

This QML property was introduced in Qt 5.9.

另请参阅 QWindow::setScreen() , QWindow::screen() , QScreen ，和 Qt.application .

title : string

The window's title in the windowing system.

The window title might appear in the title area of the window decorations, depending on the windowing system and the window flags. It might also be used by the windowing system to identify the window in other contexts, such as in the task switcher.

visibility : QWindow::Visibility

The screen-occupation state of the window.

Visibility is whether the window should appear in the windowing system as normal, minimized, maximized, fullscreen or hidden.

To set the visibility to AutomaticVisibility means to give the window a default visible state, which might be FullScreen or Windowed depending on the platform. However when reading the visibility property you will always get the actual state, never AutomaticVisibility .

When a window is not visible its visibility is Hidden, and setting visibility to Hidden is the same as setting visible to false .

该 QML 特性在 Qt 5.1 引入。

另请参阅 visible .

visible : bool

Whether the window is visible on the screen.

Setting visible to false is the same as setting visibility to Hidden .

另请参阅 visibility .

width : int

Defines the window's position and size.

(x, y) 位置相对于 Screen if there is only one, or to the virtual desktop (arrangement of multiple screens).

Window { x: 100; y: 100; width: 100; height: 100 }

x : int

Defines the window's position and size.

(x, y) 位置相对于 Screen if there is only one, or to the virtual desktop (arrangement of multiple screens).

Window { x: 100; y: 100; width: 100; height: 100 }

y : int

Defines the window's position and size.

(x, y) 位置相对于 Screen if there is only one, or to the virtual desktop (arrangement of multiple screens).

Window { x: 100; y: 100; width: 100; height: 100 }

附加特性文档编制

Window.active : bool

This attached property tells whether the window is active. The Window attached property can be attached to any Item.

Here is an example which changes a label to show the active state of the window in which it is shown:

import QtQuick 2.4
import QtQuick.Window 2.2
Text {
    text: Window.active ? "active" : "inactive"
}

This QML property was introduced in Qt 5.4.

Window.activeFocusItem : Item

This attached property holds the item which currently has active focus or null if there is no item with active focus. The Window attached property can be attached to any Item.

This QML property was introduced in Qt 5.4.

Window.contentItem : Item

This attached property holds the invisible root item of the scene or null if the item is not in a window. The Window attached property can be attached to any Item.

This QML property was introduced in Qt 5.4.

Window.height : int

These attached properties hold the size of the item's window. The Window attached property can be attached to any Item.

This QML property was introduced in Qt 5.5.

Window.visibility : QWindow::Visibility

This attached property holds whether the window is currently shown in the windowing system as normal, minimized, maximized, fullscreen or hidden. The Window attached property can be attached to any Item. If the item is not shown in any window, the value will be Hidden .

This QML property was introduced in Qt 5.4.

另请参阅 visible and visibility.

Window.width : int

These attached properties hold the size of the item's window. The Window attached property can be attached to any Item.

This QML property was introduced in Qt 5.5.

Window.window : Window

This attached property holds the item's window. The Window attached property can be attached to any Item.

This QML property was introduced in Qt 5.7.

信号文档编制

void closing ( CloseEvent close )

This signal is emitted when the user tries to close the window.

This signal includes a close parameter. The close.accepted property is true by default so that the window is allowed to close; but you can implement an onClosing handler and set close.accepted = false if you need to do something else before the window can be closed.

相应处理程序是 onClosing .

This QML signal was introduced in Qt 5.1.

方法文档编制

alert ( int msec )

导致展示警报 msec 毫秒。若 msec is 0 (the default), then the alert is shown indefinitely until the window becomes active again.

在警报状态下，窗口指示 "要求关注"，例如：通过刷新 (或弹跳) 任务栏条目。

This QML method was introduced in Qt 5.1.

close ()

Closes the window.

When this method is called, or when the user tries to close the window by its title bar button, the closing signal will be emitted. If there is no handler, or the handler does not revoke permission to close, the window will subsequently close. If the QGuiApplication::quitOnLastWindowClosed 特性为 true , and there are no other windows open, the application will quit.

hide ()

隐藏窗口。

相当于设置 visible to false or visibility to Hidden .

另请参阅 show() .

lower ()

Lowers the window in the windowing system.

请求降低窗口将出现在其它窗口下方。

raise ()

Raises the window in the windowing system.

请求提升窗口将出现在其它窗口上方。

requestActivate ()

请求激活窗口 (即：接收键盘聚焦)。

This QML method was introduced in Qt 5.1.

show ()

展示窗口。

这相当于调用 showFullScreen() , showMaximized() ，或 showNormal() , depending on the platform's default behavior for the window type and flags.

另请参阅 showFullScreen() , showMaximized() , showNormal() , hide() ，和 QQuickItem::flags() .

showFullScreen ()

以全屏方式展示窗口。

相当于设置 visibility to FullScreen .

showMaximized ()

按最大化方式展示窗口。

相当于设置 visibility to Maximized .

showMinimized ()

按最小化方式展示窗口。

相当于设置 visibility to Minimized .

showNormal ()

按正常方式 (即：最大化、最小化、或全屏) 展示窗口。

相当于设置 visibility to Windowed .