03-图像操作/仿QQ截图/ScreenCutter/Form2.cs

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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 ScreenCutter
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        public Image ig;
        private Graphics MainPainter;
        private Pen pen;
        private bool isDowned;
        private Image baseImage;
        private Rectangle Rect;
        private bool RectReady;
        private Point downPoint;
        private bool change;
        Rectangle[] Rectpoints;
        int point;
        int tmpx;
        int tmpy;

        private void DrawRect(Graphics Painter, int Mouse_x, int Mouse_y)
        {
            int width = 0;
            int heigth = 0;
            if (Mouse_y < Rect.Y)
            {
                Rect.Y = Mouse_y;
                heigth = downPoint.Y - Mouse_y;
            }
            else
            {
                heigth = Mouse_y - downPoint.Y;
            }
            if (Mouse_x < Rect.X)
            {
                Rect.X = Mouse_x;
                width = downPoint.X - Mouse_x;
            }
            else
            {
                width = Mouse_x - downPoint.X;
            }
            Rect.Size = new Size(width, heigth);
            DrawRects(Painter);
        }
        private void DrawRects(Graphics Painter)
        {
            Painter.DrawRectangle(pen, Rect);
        }