MPAndroidChart-在MarkerView中单击按钮

问题描述

当前，我在布局中有一个Button，但是分配的OnClickListener从不回调onClick方法.

Currently I have a Button in a layout, however an assigned OnClickListener never calls back to the onClick method.

是否可以在分配给MarkerView的布局中拦截按钮的单击?

Is it possible to intercept the click of a Button in a layout assigned to a MarkerView?

推荐答案

我已经完成了带有可点击标记视图的应用程序.我的解决方案是，我们将创建LineChart(或其他图表)的子类，然后重写onTouchEvent并检测触摸位置.

I have finished my app with clickable marker view. My solution is that we'll create a subclass of LineChart (or other chart), then let override onTouchEvent and detect the touch location.

public class MyChart extends LineChart {

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        boolean handled = true;
        // if there is no marker view or drawing marker is disabled
        if (isShowingMarker() && this.getMarker() instanceof ChartInfoMarkerView){
            ChartInfoMarkerView markerView = (ChartInfoMarkerView) this.getMarker();
            Rect rect = new Rect((int)markerView.drawingPosX,(int)markerView.drawingPosY,(int)markerView.drawingPosX + markerView.getWidth(), (int)markerView.drawingPosY + markerView.getHeight());
            if (rect.contains((int) event.getX(),(int) event.getY())) {
                // touch on marker -> dispatch touch event in to marker
                markerView.dispatchTouchEvent(event);
            }else{
                handled = super.onTouchEvent(event);
            }
        }else{
            handled = super.onTouchEvent(event);
        }
        return handled;
    }

    private boolean isShowingMarker(){
        return mMarker != null && isDrawMarkersEnabled() && valuesToHighlight();
    }
}

public class ChartInfoMarkerView extends MarkerView {
    @BindView(R.id.markerContainerView)
    LinearLayout markerContainerView;

    protected float drawingPosX;
    protected float drawingPosY;
    private static final int MAX_CLICK_DURATION = 500;
    private long startClickTime;

    /**
     * The constructor
     *
     * @param context
     * @param layoutResource
     */
    public ChartInfoMarkerView(Context context, int layoutResource) {
        super(context, layoutResource);
        ButterKnife.bind(this);
        markerContainerView.setClickable(true);
        markerContainerView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("MARKER","click");
            }
        });
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN: {
                startClickTime = Calendar.getInstance().getTimeInMillis();
                break;
            }
            case MotionEvent.ACTION_UP: {
                long clickDuration = Calendar.getInstance().getTimeInMillis() - startClickTime;
                if(clickDuration < MAX_CLICK_DURATION) {
                    markerContainerView.performClick();
                }
            }
        }
        return super.onTouchEvent(event);
    }

    @Override
    public void draw(Canvas canvas, float posX, float posY) {
        super.draw(canvas, posX, posY);
        MPPointF offset = getOffsetForDrawingAtPoint(posX, posY);
        this.drawingPosX = posX + offset.x;
        this.drawingPosY = posY + offset.y;
    }
}

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