影像地图般的黑莓控制 - CLDC应用 [英] Image Map-like Blackberry Control - CLDC Application

问题描述

有谁知道一个图像像地图，黑莓控制，我可以在我的CLDC应用程序中使用的？如果没有一个，有没有办法让点击x，y坐标上MainScreen或BitmapField衍生控制？

Does anyone know of an Image Map-like Blackberry Control that I can use in my CLDC application? If there isn't one, is there a way to get click x,y coordinates on a MainScreen or BitmapField derived control?

谢谢，

推荐答案

我假设你在想这个控制风暴的 - 需要点击屏幕上的任意点有意义的唯一设备

I assume you're thinking of this control for the Storm - the only device for which clicking on an arbitrary point on screen makes sense.

在这种情况下，最简单的方法可能是继承BitmapField要成为焦点，并响应点击 - 是这样的：

In that case, the easiest way is probably to subclass BitmapField to be focusable and respond to clicks - something like this:

public class ClickableBitmapField extends BitmapField {
// Make the control focusable    
public boolean isFocusable() {
       return true; 
}

protected boolean touchEvent(TouchEvent message) {
    if (message.getEventCode == TouchEvent.CLICK) {
        int x = message.getX();
        int y = message.getY();
        // do something with x and y here
    }
}
}

当然，这会是一个复杂得多实现了轨迹球设备图像映射类型的功能 - 你必须让用户知道他们去哪里点击保持光标或东西。

Of course it'd be a lot more complicated to implement image map type functionality for a trackball device - you'd have to maintain a cursor or something so the user knows where they're clicking.

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