内容

• 特性
• 详细描述

AnchorChanges QML 类型

指定如何按状态改变项锚点。 更多...

导入语句：

import QtQuick 2.15

• 所有成员列表，包括继承成员

特性

• anchors
  • anchors.baseline : AnchorLine
  • anchors.bottom : AnchorLine
  • anchors.horizontalCenter : AnchorLine
  • anchors.left : AnchorLine
  • anchors.right : AnchorLine
  • anchors.top : AnchorLine
  • anchors.verticalCenter : AnchorLine
• target : Item

详细描述

The AnchorChanges type is used to modify the anchors of an item in a State .

AnchorChanges cannot be used to modify the margins on an item. For this, use PropertyChanges intead.

In the following example we change the top and bottom anchors of an item using AnchorChanges, and the top and bottom anchor margins using PropertyChanges :

import QtQuick 2.0
Rectangle {
    id: window
    width: 120; height: 120
    color: "black"
    Rectangle { id: myRect; width: 50; height: 50; color: "red" }
    states: State {
        name: "reanchored"
        AnchorChanges {
            target: myRect
            anchors.top: window.top
            anchors.bottom: window.bottom
        }
        PropertyChanges {
            target: myRect
            anchors.topMargin: 10
            anchors.bottomMargin: 10
        }
    }
    MouseArea { anchors.fill: parent; onClicked: window.state = "reanchored" }
}
					

AnchorChanges can be animated using AnchorAnimation .

//animate our anchor changes
Transition {
    AnchorAnimation {}
}
					

Changes to anchor margins can be animated using NumberAnimation .

有关锚点的更多信息，见 锚点布局 .

特性文档编制

anchors group
anchors.baseline : AnchorLine
anchors.bottom : AnchorLine
anchors.horizontalCenter : AnchorLine
anchors.left : AnchorLine
anchors.right : AnchorLine
anchors.top : AnchorLine
anchors.verticalCenter : AnchorLine

These properties change the respective anchors of the item.

To reset an anchor you can assign undefined :

AnchorChanges {
    target: myItem
    anchors.left: undefined          //remove myItem's left anchor
    anchors.right: otherItem.right
}
					

target : Item

此特性保持 Item for which the anchor changes will be applied.