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| 导入语句： | import QtQuick.Controls 2.2 |
| Since: | Qt 5.7 |
| 继承： |
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.
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:
另请参阅 TextField , 定制 TextArea ，和 输入控件 .
|
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 .
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 .
This property determines whether the text area accepts hover events. The default value is
true
.
This QML property was introduced in QtQuick.Controls 2.1 (Qt 5.8).
另请参阅 hovered .
This property holds whether the text area is hovered.
This QML property was introduced in QtQuick.Controls 2.1 (Qt 5.8).
另请参阅 hoverEnabled .
This property holds the short hint that is displayed in the text area before the user enters a value.
|
TextArea.flickable : TextArea |
This property attaches a text area to a Flickable .
另请参阅 ScrollBar , ScrollIndicator ，和 可卷动 TextArea .
|
void 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 position of the press, and which button is pressed.
|
void 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 position of the press, and which button is pressed.
This QML signal was introduced in QtQuick.Controls 2.1 (Qt 5.8).
另请参阅 released and pressAndHold .
|
void 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 position of the press, and which button is pressed.
This QML signal was introduced in QtQuick.Controls 2.1 (Qt 5.8).
另请参阅 pressed and pressAndHold .