QML2应用程序窗口密钥处理

Question

有什么方法可以处理QtQuick.Controls组件ApplicationWindow中的按键事件吗？Qt5.3的文档没有提供任何实现这一点的方法。并指出Keys只存在于Item-对象中。当我尝试处理按键事件时，它说"无法将Keys属性附加到：ApplicationWindow_QMLTYPE_16（0x31ab890）不是项目"：

import QtQuick 2.2
import QtQuick.Controls 1.2
import QtQuick.Controls.Styles 1.1
import QtQuick.Window 2.1

ApplicationWindow {
    id: mainWindow
    visible: true
    width: 720
    height: 405
    flags: Qt.FramelessWindowHint
    title: qsTr("test")
    x: (Screen.width - width) / 2
    y: (Screen.height - height) / 2
    TextField {
        id: textField
        x: 0
        y: 0
        width: 277
        height: 27
        placeholderText: qsTr("test...")
    }
    Keys.onEscapePressed: {
        mainWindow.close()
        event.accepted = true;
    }
}

Answer 1

ApplicationWindow {
id: mainWindow
  Item {
    focus: true
    Keys.onEscapePressed: {
      mainWindow.close()
      event.accepted = true;
    }
  TextField {}
  }
}

Answer 2

也许这会对一些人有所帮助。使用Shortcut不需要设置focus。

ApplicationWindow {
    id: mainWindow
    Shortcut {
        sequence: "Esc"
        onActivated: mainWindow.close()
        }
    }
}