Building a simple Flex component.

构建一个简单的Flex组件。

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Each Flex component could theoretically have its own controller.

理论上每个Flex组件都可以拥有自己的控制器。

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The top left corner in myLabel's coordinate system is at (0,0)—which is always true for any Flex component.

myLabel 的坐标系的左上角为 (0,0) —— Flex 组件都是这样。

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