内容

• 特性
• 附加特性
• 信号
• 详细描述
• 可卷动 TextArea
• Tab 键聚焦

TextArea QML 类型

多行文本输入区域。 更多...

导入语句：	import QtQuick.Controls 2.15
Since:	Qt 5.7
继承：	TextEdit

• 所有成员列表，包括继承成员

特性

• background : Item
• bottomInset : real
• focusReason : enumeration
• hoverEnabled : bool
• hovered : bool
• implicitBackgroundHeight : real
• implicitBackgroundWidth : real
• leftInset : real
• palette : palette
• placeholderText : string
• placeholderTextColor : color
• rightInset : real
• topInset : real

附加特性

• flickable : TextArea

信号

• pressAndHold (MouseEvent event )
• pressed (MouseEvent event )
• released (MouseEvent event )

详细描述

TextArea is a multi-line text editor. TextArea extends TextEdit 采用 placeholder text functionality, and adds decoration.

TextArea {
    placeholderText: qsTr("Enter description")
}
					

TextArea is not scrollable by itself. Especially on screen-size constrained platforms, it is often preferable to make entire application pages scrollable. On such a scrollable page, a non-scrollable TextArea might behave better than nested scrollable controls. Notice, however, that in such a scenario, the background decoration of the TextArea scrolls together with the rest of the scrollable content.

可卷动 TextArea

If you want to make a TextArea scrollable, for example, when it covers an entire application page, it can be placed inside a ScrollView .

ScrollView {
    id: view
    anchors.fill: parent
    TextArea {
        text: "TextArea\n...\n...\n...\n...\n...\n...\n"
    }
}
					

A TextArea that is placed inside a ScrollView does the following:

• Sets the content size automatically
• Ensures that the background decoration stays in place
• Clips the content

Tab 键聚焦

By default, pressing the tab key while TextArea has active focus results in a tab character being input into the control itself. To make tab pass active focus onto another item, use the attached KeyNavigation properties:

TextField {
    id: textField
}
TextArea {
    KeyNavigation.priority: KeyNavigation.BeforeItem
    KeyNavigation.tab: textField
}
					

另请参阅 TextField , 定制 TextArea ，和 输入控件 .

特性文档编制

background : Item

此特性保持背景项。

注意： If the background item has no explicit size specified, it automatically follows the control's size. In most cases, there is no need to specify width or height for a background item.

注意： Most controls use the implicit size of the background item to calculate the implicit size of the control itself. If you replace the background item with a custom one, you should also consider providing a sensible implicit size for it (unless it is an item like 图像 which has its own implicit size).

另请参阅 定制 TextArea .

bottomInset : real

This property holds the bottom inset for the background.

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 Control Layout and topInset .

focusReason : enumeration

此特性保持最后聚焦更改的原因。

注意： This property does not indicate whether the control has active focus , but the reason why the control either gained or lost focus.

常量	描述
Qt.MouseFocusReason	发生鼠标动作。
Qt.TabFocusReason	按下 Tab 键。
Qt.BacktabFocusReason	发生 Backtab。输入可能包括 Shift 或 Control 键；如 Shift+Tab。
Qt.ActiveWindowFocusReason	窗口系统使此窗口活动或不活动。
Qt.PopupFocusReason	应用程序打开/关闭弹出窗口，抓取/释放键盘焦点。
Qt.ShortcutFocusReason	用户键入标签的好友快捷方式
Qt.MenuBarFocusReason	菜单栏获得聚焦。
Qt.OtherFocusReason	另一原因，通常特定于应用程序。

另请参阅 Item::activeFocus .

hoverEnabled : bool

This property determines whether the text area accepts hover events. The default value is true .

该特性在 QtQuick.Controls 2.1 (Qt 5.8) 引入。

另请参阅 hovered .

[read-only] hovered : bool

This property holds whether the text area is hovered.

该特性在 QtQuick.Controls 2.1 (Qt 5.8) 引入。

另请参阅 hoverEnabled .

[read-only] implicitBackgroundHeight : real

This property holds the implicit background height.

值等于 background ? background.implicitHeight : 0 .

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 implicitBackgroundWidth .

[read-only] implicitBackgroundWidth : real

This property holds the implicit background width.

值等于 background ? background.implicitWidth : 0 .

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 implicitBackgroundHeight .

leftInset : real

This property holds the left inset for the background.

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 Control Layout and rightInset .

palette : palette

This property holds the palette currently set for the text area.

该特性在 QtQuick.Controls 2.3 (Qt 5.10) 引入。

另请参阅 Control::palette .

placeholderText : string

This property holds the short hint that is displayed in the text area before the user enters a value.

placeholderTextColor : color

This property holds the color of placeholderText .

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 placeholderText .

rightInset : real

This property holds the right inset for the background.

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 Control Layout and leftInset .

topInset : real

This property holds the top inset for the background.

该特性在 QtQuick.Controls 2.5 (Qt 5.12) 引入。

另请参阅 Control Layout and bottomInset .

附加特性文档编制

TextArea.flickable : TextArea

This property attaches a text area to a Flickable .

另请参阅 ScrollBar , ScrollIndicator ，和 可卷动 TextArea .

信号文档编制

pressAndHold ( MouseEvent event )

This signal is emitted when there is a long press (the delay depends on the platform plugin). The event parameter provides information about the press, including the x and y coordinates of the press, and which button is pressed.

注意： 相应处理程序是 onPressAndHold .

另请参阅 pressed and released .

pressed ( MouseEvent event )

This signal is emitted when the text area is pressed by the user. The event parameter provides information about the press, including the x and y coordinates of the press, and which button is pressed.

注意： 相应处理程序是 onPressed .

该信号在 QtQuick.Controls 2.1 (Qt 5.8) 引入。

另请参阅 released and pressAndHold .

released ( MouseEvent event )

This signal is emitted when the text area is released by the user. The event parameter provides information about the release, including the x and y coordinates of the press, and which button is pressed.

注意： 相应处理程序是 onReleased .

该信号在 QtQuick.Controls 2.1 (Qt 5.8) 引入。

另请参阅 pressed and pressAndHold .