代码是酱紫!
是直接画在窗体上的
实现了鼠标Move过程中线一直存在!
但是!Clear命令导致之前画的所有线都没了!
我的想法是。。。能不能再MouseDown的时候,把之前画的存起来,画完再加载??求教啊~我是菜鸟!想用最简单的方法实现先。。。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace PAINTER
{
public partial class Form1 : Form
{
private Image MyImg;
int startX, startY;
Graphics g;
bool mouseDown = false;
public Form1()
{
InitializeComponent();
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
this.MouseDown += new MouseEventHandler(Form1_MouseDown);
this.MouseUp += new MouseEventHandler(Form1_MouseUp);
this.MouseMove += new MouseEventHandler(Form1_MouseMove);
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
mouseDown = true;
startX = e.X;
startY = e.Y;
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
mouseDown = false;
g = this.CreateGraphics();
Pen p = new Pen(Color.Cyan,3);
System.Drawing.Drawing2D.AdjustableArrowCap lineArrow =
new System.Drawing.Drawing2D.AdjustableArrowCap(4, 4, true);
p.CustomEndCap = lineArrow;