突然想把手机九宫格解锁用 c# 移植到winform中。说干就干，花费一点时间简单的实现了一下九宫格解锁功能；示例程序基于Graphics gdi绘图实现。也挺简单，示例程序是基于winform实现九宫格解锁功能，wpf可以直接调用winform控件，所以问题不大。下面贴上控件下载地址，需要的朋友自行下载
下载地址：https://github.com/zonevg/ScreenLock
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Text;
using System.Windows.Forms;
namespace LockControl
{
public partial class ScreenLock : UserControl
{
public ScreenLock()
{
InitializeComponent();
}
/// <summary>
/// 返回解锁结果事件
/// </summary>
public event Action<UnlockEventArgs> OnUlocked;
/// <summary>
/// 解锁密码
/// </summary>
public string Password { get; set; } = "12345678";
//九宫格的九个点
private List<Point> InitialPoints = new List<Point>();
//解锁点列表
private List<Point> UnLockPoints = new List<Point>();
//绘制九宫格圆心点的画笔
private Pen DrawPen = new Pen(Color.FromArgb(200, Color.Green), 5);
//是否开始绘制解锁（鼠标左键按下时开始）
private bool _isDraw = false;
//是否选中九宫格中的其中一个点
private bool _isSelected = false;
//临时存储密码字符串
public string PasswordStr = string.Empty;
#region 控件事件
/// <summary>
/// 鼠标点击左键且移动时开始绘制解锁
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DrawMouseMove(object sender, MouseEventArgs e)
{
if (_isDraw)
{
//如果还未确定九宫格的点则实时改变最后一个点的坐标
if (!_isSelected)
{
UnLockPoints[UnLockPoints.Count - 1] = e.Location;
}
else//如果确定了则再添加一个改变点
{
UnLockPoints.Add(e.Location);
_isSelected = false;
}
AddPoint(e.Location);
}
ShowAreaAndLine();
//GC.Collect();
}
/// <summary>
/// 鼠标左键弹起时结束绘制九宫格
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DrawMouseUp(object sender, MouseEventArgs e)
{
if (_isDraw)
{
//停止绘制标示
_isDraw = false;
//清除绘制的九宫格点
UnLockPoints.Clear();
//显示密码（可用来判断九宫格密码）
if (PasswordStr.Length < 4)
{
OnUlocked?.Invoke(new UnlockEventArgs() { IsSuc = false, Message = "九宫格密码不能小于4个点", Password = PasswordStr });
}
else
{
if (PasswordStr == Password.Replace(" ", ""))
{
OnUlocked?.Invoke(new UnlockEventArgs() { IsSuc = true, Message = "解锁成功", Password = PasswordStr });
}
else
{
OnUlocked?.Invoke(new UnlockEventArgs() { IsSuc = false, Message = "解锁密码错误", Password = PasswordStr });
}
}
PasswordStr = "";
//绘制九宫格（此处相当于初始化九宫格）
ShowAreaAndLine();
}
}
/// <summary>
/// 鼠标左键点击时触发开始绘制九宫格
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DrawMouseDown(object sender, MouseEventArgs e)
{
//开始绘制标记
_isDraw = true;
//添加第一个点击的点
UnLockPoints.Add(e.Location);
//显示九宫格解锁图案
ShowAreaAndLine();
}
private void ScreenLock_Load(object sender, EventArgs e)
{
CreadtPoint();
CreateCanvas();
}
#endregion
#region 公共方法
/// <summary>
/// 初始化九宫格的九个点
/// </summary>
private void CreadtPoint()
{
InitialPoints.Clear();
int width = pnl_bg.Width / 3;
int height = pnl_bg.Height / 3;
for (int x = 0; x < 3; x++)
{
for (int y = 0; y < 3; y++)
{
InitialPoints.Add(new Point(width * y + width / 2, height * x + height / 2));
}
}
}
private void CreateCanvas()
{
//添加一块画布
Bitmap backBit = new Bitmap(pnl_bg.Width, pnl_bg.Height);
Graphics g = Graphics.FromImage(backBit);
g.SmoothingMode = SmoothingMode.HighQuality;
//清除Graphics
g.Clear(pnl_bg.BackColor);
//绘制画布
g.DrawImage(backBit, new Rectangle(0, 0, pnl_bg.Width, pnl_bg.Height),
new Rectangle(0, 0, pnl_bg.Width, pnl_bg.Height), GraphicsUnit.Pixel);
//绘制九宫格的点
for (int i = 0; i < InitialPoints.Count; i++)
{
g.DrawImage(LockControl.Resource.Shape, new Point(InitialPoints[i].X - 20, InitialPoints[i].Y - 20));
}
pnl_bg.BackgroundImage = backBit;
}
/// <summary>
/// 判断传入的点是否九宫格中的点
/// </summary>
/// <param name="p">点</param>
private void AddPoint(Point p)
{
for (int i = 0; i < InitialPoints.Count; i++)
{
//遍历九宫格的点，鼠标经过的点是否在其中一个九宫格的点的范围内
if ((p.X > InitialPoints[i].X - 20 && p.X < InitialPoints[i].X + 20) && (p.Y > InitialPoints[i].Y - 20 && p.Y < InitialPoints[i].Y + 20))
{
//判断九宫格的点是否已经选择过，若选择过则不处理
if (!(PasswordStr.IndexOf((i + 1).ToString()) > -1))
{
//若尚未选择过该点则添加
UnLockPoints[UnLockPoints.Count - 1] = (InitialPoints[i]);
//追加密码字符串
PasswordStr = PasswordStr + (i + 1);
_isSelected = true;
return;
}
}
}
}
/// <summary>
/// 绘制九宫格解锁图案
/// </summary>
private void ShowAreaAndLine()
{
try
{
//添加一块画布
Bitmap backBit = new Bitmap(pnl_bg.Width, pnl_bg.Height);
Graphics g = Graphics.FromImage(backBit);
g.SmoothingMode = SmoothingMode.HighQuality;
//清除Graphics
g.Clear(pnl_bg.BackColor);
//绘制画布
g.DrawImage(backBit, new Rectangle(0, 0, pnl_bg.Width, pnl_bg.Height),
new Rectangle(0, 0, pnl_bg.Width, pnl_bg.Height), GraphicsUnit.Pixel);
//绘制九宫格的点
for (int i = 0; i < InitialPoints.Count; i++)
{
g.DrawImage(LockControl.Resource.Shape, new Point(InitialPoints[i].X - 20, InitialPoints[i].Y - 20));
}
//绘制选中的解锁点
int pointIndex = 1;
Point pointEnd;
Point pointStart = new Point(0, 0);
for (int i = 0; i < UnLockPoints.Count; i++)
{
//绘制选中点背景
if (i < UnLockPoints.Count - 1 || _isSelected)
{
//高亮绘制选中点
g.DrawImage(LockControl.Resource.Shape, new Point(UnLockPoints[i].X - 20, UnLockPoints[i].Y - 20));
}
pointEnd = UnLockPoints[i];
//绘制两点连接的直线
if (pointIndex > 1)
{
g.DrawLine(DrawPen, pointStart, pointEnd);
}
//绘制小圆，覆盖两条线段的连接处
if (i < UnLockPoints.Count - 1 || _isSelected)
{
//绘制区域（）
Rectangle rg = new Rectangle(UnLockPoints[i].X - 6, UnLockPoints[i].Y - 6, 11, 11);
g.DrawEllipse(DrawPen, rg);
//画空心圆
Brush bru = new SolidBrush(Color.FromArgb(255, Color.Green));
g.FillEllipse(bru, rg);
//填充空心圆，实心圆
}
pointStart = UnLockPoints[i];
pointIndex++;
}
g.Dispose();
pnl_bg.CreateGraphics().DrawImage(backBit, 0, 0);
backBit.Dispose();
}
catch (Exception ex)
{
Debug.Write(ex.Message);
}
}
#endregion
}
/// <summary>
/// 解锁结果信息
/// </summary>
public class UnlockEventArgs : EventArgs
{
//是否解锁成功
public bool IsSuc { get; set; }
//消息
public string Message { get; set; }
//解锁密码
public string Password { get; set; }
}
}
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