[求助]QML FocusScope 的 activeFocus 条件没有生效

bphanzhu · **发表于 :** 2012-08-31 19:11

使用 QML 写的一个 TextEntry，希望在获得焦点时，边框的宽度和颜色发生变化，但是在测试的时候发现TextEntry获取到焦点之后，边框和背景均没有发生变化，请问是否 QML 写的有误？或者系统、QT的什么配置可能导致这个问题-.-

代码:

    import QtQuick 1.1
    FocusScope {
        id: focusScope
        width: 200;
        height: 36
        property alias text: textInput.text
        property alias echoMode: textInput.echoMode
        property alias validator: textInput.validator
        Rectangle {
            id: container
            width: parent.width
            height: parent.height
            anchors.fill: parent
            color: parent.activeFocus ? "#ffffff" : "#e6e1e1"
            border.width: parent.activeFocus ? 2 : 1
            border.color: parent.activeFocus ? "blue": "gray"
            radius: 6
        }
        TextInput {
            id: textInput
            font.pointSize: 12
            anchors.rightMargin: 10
            anchors.leftMargin: 10
            anchors.bottomMargin: parent.height / 6
            anchors.topMargin: parent.height / 6
            anchors.fill: parent
            focus: true
            selectByMouse: true
            smooth: true
        }
        MouseArea {
            id: mouseArea
            anchors.fill: parent
            hoverEnabled: true
            onClicked: parent.focus = true
        }
    }

我的环境是 Fedora 17, QT 4.8

lexdene · **发表于 :** 2012-09-07 15:43

这个不大懂，
摘抄官方文档上的一段话过来。
地址：http://qt-project.org/doc/qt-4.8/qdeclarativeintroduction.html#attached-properties

引用:

Attached Properties

Some objects attach properties to another object. Attached Properties are of the form Type.property where Type is the type of the element that attaches property.

For example, the ListView element attaches the ListView.isCurrentItem property to each delegate it creates:

Component {
id: myDelegate
Text {
text: "Hello"
color: ListView.isCurrentItem ? "red" : "blue"
}
}

ListView {
delegate: myDelegate
}

Another example of attached properties is the Keys element which attaches properties for handling key presses to any visual Item, for example:

Item {
focus: true
Keys.onSelectPressed: console.log("Selected")
}

bphanzhu · **发表于 :** 2012-09-09 14:47

lexdene 写道:

这个不大懂，
摘抄官方文档上的一段话过来。
地址：http://qt-project.org/doc/qt-4.8/qdeclarativeintroduction.html#attached-properties

引用:

Attached Properties

Some objects attach properties to another object. Attached Properties are of the form Type.property where Type is the type of the element that attaches property.

For example, the ListView element attaches the ListView.isCurrentItem property to each delegate it creates:

Component {
id: myDelegate
Text {
text: "Hello"
color: ListView.isCurrentItem ? "red" : "blue"
}
}

ListView {
delegate: myDelegate
}

Another example of attached properties is the Keys element which attaches properties for handling key presses to any visual Item, for example:

Item {
focus: true
Keys.onSelectPressed: console.log("Selected")
}

多谢关注，我想这个问题应该是一些bug所致，同样的代码在windows下是完全正常的。

[求助]QML FocusScope 的 activeFocus 条件没有生效

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