创建新的顶层窗口。 更多...
| import 语句： | import QtQuick |
| 实例化： | QQuickWindow |
The Window object creates a new top-level window for a Qt Quick scene. It automatically sets up the window for use with
QtQuick
graphical types.
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 that sets
close.accepted = false
unless it's safe to close the window (for example, because there are no more unsaved changes).
onClosing: (close) => { if (document.changed) { close.accepted = false confirmExitPopup.open() } } // The confirmExitPopup allows user to save or discard the document, // or to cancel the closing.
|
[read-only] height : int |
|
[read-only] width : int |
|
[read-only] x : int |
|
[read-only] 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 }
|
[read-only] minimumHeight : int |
|
[read-only] 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.
|
[read-only] maximumHeight : int |
|
[read-only] 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.
|
[read-only] active : bool |
The active status of the window.
Window { visible: true // here we use the Window.active and Window.palette ordinary properties color: active ? palette.active.window : palette.inactive.window }
另请参阅 requestActivate ().
|
[read-only] activeFocusItem : Item |
The item which currently has active focus or
null
若没有项具有活动聚焦。
|
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.
|
[read-only] 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 .
另请参阅 Screen .
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 ().
|
[read-only] 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 that you read from this property might differ from the ones that you set if the requested flags could not be fulfilled.
import QtQuick Window { id: mainWindow title: "Main Window" color: "#456" property real defaultSpacing: 10 property Splash splash: Splash { onTimeout: mainWindow.show() } component Splash: Window { id: splash // a splash screen has no titlebar flags: Qt.SplashScreen // the transparent color lets background behind the image edges show through color: "transparent" modality: Qt.ApplicationModal // in case another application window is showing title: "Splash Window" // for the taskbar/dock, task switcher etc. visible: true // here we use the Screen attached property to center the splash window x: (Screen.width - splashImage.width) / 2 y: (Screen.height - splashImage.height) / 2 width: splashImage.width height: splashImage.height property int timeoutInterval: 2000 signal timeout Image { id: splashImage source: "images/qt-logo.png" } TapHandler { onTapped: splash.timeout() } Timer { interval: splash.timeoutInterval; running: true; repeat: false onTriggered: { splash.visible = false splash.timeout() } } } }
另请参阅 Qt::WindowFlags and Qt Quick 范例 - 窗口和屏幕 .
|
[read-only] 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.
|
[read-only] 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。
|
[since 6.0] palette : Palette |
This property holds the palette currently set for the window.
The default palette depends on the system environment. QGuiApplication maintains a system/theme palette which serves as a default for all application windows. You can also set the default palette for windows by passing a custom palette to QGuiApplication::setPalette (), before loading any QML.
Window propagates explicit palette properties to child items and controls, overriding any system defaults for that property.
import QtQuick import QtQuick.Controls Window { visible: true // here we use the Window.active and Window.palette ordinary properties color: active ? palette.active.window : palette.inactive.window // colors that are not customized here come from SystemPalette palette.active.window: "peachpuff" palette.windowText: "brown" Text { anchors.centerIn: parent // here we use the Window.active attached property and the Item.palette property color: Window.active ? palette.active.windowText : palette.inactive.windowText text: Window.active ? "active" : "inactive" } Button { text: "Button" anchors { bottom: parent.bottom bottomMargin: 6 horizontalCenter: parent.horizontalCenter } } }
This property was introduced in Qt 6.0.
另请参阅 Item::palette , Popup::palette , ColorGroup ，和 SystemPalette .
|
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.
另请参阅 QWindow::setScreen (), QWindow::screen (), QScreen ，和 Qt.application .
|
[read-only] 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.
|
transientParent : QWindow |
The window for which this window is a transient pop-up.
This is a hint to the window manager that this window is a dialog or pop-up on behalf of the transient parent. It usually means that the transient window will be centered over its transient parent when it is initially shown, that minimizing the parent window will also minimize the transient window, and so on; however results vary somewhat from platform to platform.
Normally if you declare a Window inside an Item or inside another Window, this relationship is deduced automatically. In that case, if you declare this window's
visible
property
true
, it will not actually be shown until the
transientParent
window is shown.
However if you set this property, then Qt Quick will no longer wait until the
transientParent
window is shown before showing this window. If you want to be able to show a transient window independently of the "parent" Item or Window within which it was declared, you can remove that relationship by setting
transientParent
to
null
:
Window { // visible is false by default Window { transientParent: null visible: true } }
In order to cause the window to be centered above its transient parent by default, depending on the window manager, it may also be necessary to set the
Window::flags
property with a suitable
Qt::WindowType
(譬如
Qt::Dialog
).
|
[read-only] 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
.
import QtQuick import QtQuick.Controls Window { id: win flags: Qt.Window | Qt.WindowFullscreenButtonHint visibility: fullscreenButton.checked ? Window.FullScreen : Window.Windowed Button { id: fullscreenButton anchors { right: parent.right top: parent.top margins: 6 } width: height checkable: true Binding on checked { value: win.visibility === Window.FullScreen } text: "⛶" ToolTip.visible: hovered ToolTip.delay: Qt.styleHints.mousePressAndHoldInterval ToolTip.text: win.visibility === Window.FullScreen ? qsTr("restore") : qsTr("fill screen") } }
另请参阅 visible and Qt Quick 范例 - 窗口和屏幕 .
|
[read-only] 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 .
|
[read-only] Window.height : int |
|
[read-only] Window.width : int |
These attached properties hold the size of the item's window. The Window attached property can be attached to any Item.
|
[read-only] 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 Text { text: Window.active ? "active" : "inactive" }
|
[read-only] 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.
|
[read-only] 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.
|
[read-only] 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
.
另请参阅 visible and visibility .
|
Window.window : Window |
This attached property holds the item's window. The Window attached property can be attached to any Item.
|
afterAnimating () |
此信号在 GUI 线程中发射，在请求渲染线程以履行场景图形的同步前。
You can implement onAfterAnimating to do additional processing after each animation step.
注意：
相应处理程序是
onAfterAnimating
.
|
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.
注意：
相应处理程序是
onClosing
.
|
frameSwapped () |
This signal is emitted when a frame has been queued for presenting. With vertical synchronization enabled the signal is emitted at most once per vsync interval in a continuously animating scene.
注意：
相应处理程序是
onFrameSwapped
.
|
sceneGraphError ( SceneGraphError error , QString message ) |
此信号被发射当 error 出现在场景图形初始化期间。
You can implement onSceneGraphError(error, message) to handle errors, such as graphics context creation failures, in a custom way. If no handler is connected to this signal, Quick will print the message , or show a message box, and terminate the application.
注意：
相应处理程序是
onSceneGraphError
.
|
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。
|
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)。
|
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 .
