如何一次有条件地设置属性组的不同属性?
示例:假设有一个上下文属性 _context.condition
可用 . 鉴于该值,我想为qml项设置不同的锚点 .
// Some item...
Rectangle {
id: square
width: 50
height: 50
// For simple properties this should work:
color: { if (_context.condition) "blue"; else "red" }
// But how to do it for complex properties like 'anchors'?
// Note that I set different properties for different values of the condition.
// Here is how I would do it, but this does not work:
anchors: {
if (_context.condition) {
// Anchors set 1:
horizontalCenter: parent.horizontalCenter
bottom: parent.bottom
bottomMargin: 20
} else {
// Anchors set 2:
verticalCenter: parent.verticalCenter
right: parent.right
rightMargin: 20
}
}
}
我在Qt 5.3中使用QtQuick 2.0 . 谢谢!
1 回答
你可以尝试这个(未测试):
Resetting properties values
另外,根据this空花括号可用于重置属性值: