/**
 * author by lyu
 * date on 2021/5/26-19:55
 * description:九宫格数字软键盘
 */
public class ninenumerickeyboardview extends view {
    /**
     * 列
     */
    private static final int total_col = 3;
    /**
     * 行
     */
    private static final int total_row = 4;

    private paint huisebgpaint, linepaint;
    private paint mtextpaint;
    private int mviewwidth; // 键盘宽度
    private int mviewhight; // 键盘高度
    private float mcellwidth, mcellhight; // 单元格宽度、高度
    private row rows[] = new row[total_row];
    private bitmap bitmap; // 删除按钮图片
    private paint mcuttextpaint;


    //回调方法
    public interface callback {
        void clicknum(string num);// 回调点击的数字

        void deletenum();// 回调删除
    }

    private callback mcallback;// 回调

    public void setoncallback(callback callback) {
        mcallback = callback;
    }

    public ninenumerickeyboardview(context context, attributeset attrs, int defstyle) {
        super(context, attrs, defstyle);
        init(context);

    }

    public ninenumerickeyboardview(context context, attributeset attrs) {
        super(context, attrs);
        init(context);

    }

    public ninenumerickeyboardview(context context) {
        super(context);
        init(context);
    }

    @override
    protected void ondraw(canvas canvas) {
        super.ondraw(canvas);
        drawline(canvas);
        for (int i = 0; i < total_row; i++) {
            if (rows[i] != null)
                rows[i].drawcells(canvas);
        }
    }

    /**
     * 画6条直线
     *
     * @param canvas
     */
    private void drawline(canvas canvas) {
        canvas.drawline(0, 0, mviewwidth, 0, linepaint);
        canvas.drawline(0, mcellhight, mviewwidth, mcellhight, linepaint);
        canvas.drawline(0, mcellhight * 2, mviewwidth, mcellhight * 2, linepaint);
        canvas.drawline(0, mcellhight * 3, mviewwidth, mcellhight * 3, linepaint);
        canvas.drawline(mcellwidth, 0, mcellwidth, mviewhight, linepaint);
        canvas.drawline(mcellwidth * 2, 0, mcellwidth * 2, mviewhight, linepaint);


    }

    /**
     * 初始化画笔
     *
     * @param context
     */
    private void init(context context) {
        mtextpaint = new paint(paint.anti_alias_flag);
        mcuttextpaint = new paint(paint.anti_alias_flag);
        linepaint = new paint(paint.anti_alias_flag);
        linepaint.settextsize(1.0f);
        linepaint.setcolor(0x90000000);

        huisebgpaint = new paint(paint.anti_alias_flag);
        huisebgpaint.setstyle(paint.style.fill);
        huisebgpaint.setcolor(color.parsecolor("#e9e9e9"));

        initdate();
    }

    private void initdate() {
        filldate();
    }

    @override
    protected void onsizechanged(int w, int h, int oldw, int oldh) {
        super.onsizechanged(w, h, oldw, oldh);
        mviewwidth = w;
        mviewhight = h;
        mcellwidth = mviewwidth / total_col;
        mcellhight = mviewhight / total_row;
        mtextpaint.settextsize(mcellhight / 3);

    }

    private cell mclickcell = null;
    private float mdownx;
    private float mdowny;

    /*
     *
     * 触摸事件为了确定点击位置的数字
     */
    @override
    public boolean ontouchevent(motionevent event) {
        switch (event.getaction()) {
            case motionevent.action_down:
                mdownx = event.getx();
                mdowny = event.gety();
                int col = (int) (mdownx / mcellwidth);
                int row = (int) (mdowny / mcellhight);
                measureclickcell(col, row);
                break;
            case motionevent.action_up:
                if (mclickcell != null) {
                    // 在抬起后把状态置为默认
                    rows[mclickcell.i].cells[mclickcell.j].state = state.default_num;
                    mclickcell = null;
                    invalidate();
                }
                break;
        }
        return true;
    }

    /**
     * 测量点击单元格
     *
     * @param col 列
     * @param row 行
     */
    private void measureclickcell(int col, int row) {
        if (col >= total_col || row >= total_row)
            return;
        if (rows[row] != null) {
            mclickcell = new cell(rows[row].cells[col].num, rows[row].cells[col].state, rows[row].cells[col].i,
                    rows[row].cells[col].j);
            rows[row].cells[col].state = state.click_num;
            if ("-5".equals(rows[row].cells[col].num)) {
                mcallback.deletenum();
            } else {
                mcallback.clicknum(rows[row].cells[col].num);
            }
            invalidate();
        }
    }

    /**
     * 组 以一行为一组
     */
    private class row {
        public int j;

        row(int j) {
            this.j = j;
        }

        // 一行3个单元格
        public cell[] cells = new cell[total_col];

        public void drawcells(canvas canvas) {
            for (int i = 0; i < cells.length; i++) {
                if (cells[i] != null)
                    cells[i].drawself(canvas);
            }

        }
    }

    // 单元格
    private class cell {
        public string num;
        public state state;
        /**
         * i = 行 j = 列
         */
        public int i;
        public int j;

        public cell(string num, state state, int i, int j) {
            super();
            this.num = num;
            this.state = state;
            this.i = i;
            this.j = j;
        }

        // 绘制一个单元格 如果颜色需要自定义可以修改
        public void drawself(canvas canvas) {
            switch (state) {
                case click_num:
                    // 绘制点击效果灰色背景
                    canvas.drawrect((mcellwidth * j), (mcellhight * i),
                            (mcellwidth * (j + 1)), (mcellhight * (i + 1)), huisebgpaint);
                    break;
            }
            if ("-5".equals(num)) {
                // 绘制删除图片
                canvas.drawbitmap(bitmap, (float) (mcellwidth * 2.5 - bitmap.getwidth() / 2), (float) (mcellhight * 3.5 - bitmap.getheight() / 2), huisebgpaint);
            } else {
                // 绘制数字
                canvas.drawtext(num, (float) ((j + 0.5) * mcellwidth - mtextpaint.measuretext(num) / 2),
                        (float) ((i + 0.5) * mcellhight + mtextpaint.measuretext(num, 0, 1) / 2),
                        mtextpaint);
            }


        }
    }

    /**
     * cell的state
     */
    private enum state {
        default_num, click_num;
    }

    private list<string> numkeys = arrays.aslist("1", "2", "3", "4", "5", "6", "7", "8", "9", "0");

    /**
     * 填充数字
     */
    private void filldate() {
        int postion = 0;
        for (int i = 0; i < total_row; i++) {
            rows[i] = new row(i);
            for (int j = 0; j < total_col; j++) {
                if (i == 3 && j == 0) {
                    rows[i].cells[j] = new cell(".", state.default_num, i, j);
                    continue;
                } else if (i == 3 && j == 2) {
                    rows[i].cells[j] = new cell("-5", state.default_num, i, j);
                    continue;
                } else {
                    rows[i].cells[j] = new cell(numkeys.get(postion), state.default_num, i, j);
                    postion++;
                }
            }
        }
        //这里是插入一张删除数字的图 一般是 x
        bitmap = bitmapfactory.decoderesource(getresources(), r.mipmap.keyboard_delete);
    }

}

 //初始化键盘
    private void initkeyboardview() {
        // 设置不弹出系统键盘
        etinputpickupcode.setinputtype(inputtype.type_null);
        // 自己监听edittext的点击事件弹出我们自定义的键盘
        etinputpickupcode.setonclicklistener(view -> mpop.showatlocation(llkey, gravity.bottom, 0, 0));
        mpop = new popupwindow();
        mpopview = layoutinflater.from(getapplicationcontext()).inflate(r.layout.custom_keyboardview, null);
        mpop.setcontentview(mpopview);
        mpop.settouchable(true);
        mpop.setfocusable(true);
        mpop.setbackgrounddrawable(new colordrawable());
        mpop.setwidth(viewgroup.layoutparams.match_parent);
        mpop.setheight(viewgroup.layoutparams.wrap_content);
        mcustomkeyview = mpopview.findviewbyid(r.id.key_view);
        // 设置回调，并进行文本的插入与删除
        mcustomkeyview.setoncallback(this);
    }


 @override
    public void clicknum(string num) {
        if (etinputpickupcode.gettext().length() < 8) {
            etinputpickupcode.append(num);
        }
    }

    @override
    public void deletenum() {
        int last = etinputpickupcode.gettext().length();
        if (last > 0) {
            //删除最后一位
            etinputpickupcode.gettext().delete(last - 1, last);
        }
    }