防股票折線圖十字定位(achartengine)

   防股票折線圖十字定位(achartengine)

  * @param context

     * @param view4:曲線view

     * @param x:曲線x軸集合

     * @param marginLeft：移動x軸左邊距

     * @param marginBottom：移動x軸下邊距

     * @param marginLeftY：移動y軸左邊距

     * @param marginBottomY:移動y軸左邊距

     * @param mChart

     * @param tvXY:顯示textview

     * @param lineWidth:xy線寬

     * @param mPopupView：移動y軸視圖

     * @param mPopupView2：移動x軸視圖

     * @param type：二分查詢類型

public static void markXY(final Context context, final GraphicalView view4, final List<double[]> x, final int marginLeft, final int marginBottom, final int marginLeftY, final int marginBottomY, final XYChart mChart, final TextView tvXY, final int lineWidth, final View mPopupView, final View mPopupView2, final int type){

        OnTouchListener chartViewOnTouchListener = new OnTouchListener() {

            PopupWindow mPopupWindow=null;

            PopupWindow mPopupWindow2=null;

            public boolean onTouch(View v, MotionEvent event) {

                switch (event.getAction()) {

                case MotionEvent.ACTION_DOWN:

                    mPopupWindow = new PopupWindow(mPopupView,lineWidth, view4.getHeight());

                    mPopupWindow2 = new PopupWindow(mPopupView2,view4.getWidth(), lineWidth);

                    break;

                case MotionEvent.ACTION_MOVE:

//                    //自定義設定xy

                    //擷取點選位置螢幕xy

                    float screenX = event.getX();

                    float screenY = event.getY();

                    //裝換為圖示xy

                    double[] realPoint = mChart.toRealPoint(screenX, screenY);

                    XYMultipleSeriesDataset dataset = mChart.getDataset();

                    XYSeries seriesAt = dataset.getSeriesAt(0);

                    if(x!=null&&x.size()>0){

                    int index=binarySearch(x.get(0), realPoint[0],type);

                    if(index<x.get(0).length){

                    Log.i("TAG", "dataset:"+seriesAt.getX(index)+";"+seriesAt.getY(index));

                    double[] screenPoint2 = mChart.toScreenPoint(new double[]{seriesAt.getX(index),seriesAt.getY(index)});

                    double[] screenPoint = mChart.toScreenPoint(new double[]{0,0});

                    int toBottom=(int) (view4.getHeight()-screenPoint[1]);

                    int toLeft=(int)(view4.getWidth()-screenPoint[0]);

                    if(seriesAt.getY(index)==0.0){

                        tvXY.setText("");

                    }else{

                       tvXY.setText("x:"+seriesAt.getX(index)+" y:"+seriesAt.getY(index));

                    }

                    Log.i("TAG", "screenPoint2:"+screenPoint2.length+":"+screenPoint2[0]+";"+screenPoint2[1]);

                    if (mPopupWindow.isShowing()) {

                        mPopupWindow.update((int)screenPoint2[0]+dip2px(context, marginLeftY),dip2px(context, marginBottomY)+toBottom, lineWidth,view4.getHeight()-toBottom);

                        mPopupWindow2.update(dip2px(context, marginLeft),view4.getHeight()-(int)screenPoint2[1]+dip2px(context, marginBottom), view4.getWidth(),lineWidth);

                    } else {

                        mPopupWindow.showAtLocation(view4,Gravity.BOTTOM|Gravity.LEFT, (int)screenPoint2[0]+dip2px(context, marginLeftY)+toLeft,dip2px(context, marginBottomY));

                        mPopupWindow2.showAtLocation(view4,Gravity.BOTTOM|Gravity.LEFT, dip2px(context, marginLeft),view4.getHeight()-(int)screenPoint2[1]+dip2px(context, marginBottom));

                    }    

                    }

                    }

                    break;

                case MotionEvent.ACTION_UP:

                    //隐藏定位軸

                    if (mPopupWindow != null) {

                        if (mPopupWindow.isShowing()) {

                            mPopupWindow.dismiss();

                        }

                        mPopupWindow = null;

                    }

                    if (mPopupWindow2 != null) {

                        if (mPopupWindow2.isShowing()) {

                            mPopupWindow2.dismiss();

                        }

                        mPopupWindow2 = null;

                    }

                    break;    

                }

                return false;

            }

        };

        view4.setOnTouchListener(chartViewOnTouchListener);

        view4.setId(0);

    }