使用C#怎么實現(xiàn)一個鼠標裁剪圖像功能?針對這個問題,這篇文章詳細介紹了相對應的分析和解答,希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。

具體內(nèi)容如下
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (Track_move)
endpoint = new Point(e.X, e.Y);
else
{
return;
}
rect1 = new Rectangle(stpoint.X, stpoint.Y, endpoint.X - stpoint.X, endpoint.Y - stpoint.Y);
Rectangle tempr = new Rectangle(rect1.X, rect1.Y, rect1.Width + 2, rect1.Height + 2);
this.Invalidate(tempr);
}選擇結(jié)束的處理代碼.
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && Track_move==true )
{
Track_move = false;
endpoint = new Point(e.X, e.Y);
rect1 = new Rectangle(stpoint.X, stpoint.Y, endpoint.X - stpoint.X, endpoint.Y - stpoint.Y);
Rectangle rectorg = new Rectangle(borg.X, borg.Y, image1.Width, image1.Height);
if (rect1.Width <= 0)
return;
if (rect1.Height <= 0)
return;
if (rectorg.Contains(rect1))
{
Rectangle rectadj = new Rectangle(rect1.X - borg.X, rect1.Y - borg.Y, rect1.Width, rect1.Height);
Bitmap cropimge = image1.Clone(rectadj, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
pictureBox2.Image = cropimge;
}
else
{
pictureBox2.Image = null;
}
this.Invalidate();
}
}程序的整個代碼
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;
using System.Runtime.InteropServices;
namespace imageForms
{
static class Program
{
/// <summary>
/// 應用程序的主入口點。
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
public partial class Form1 : Form
{
private System.Windows.Forms.PictureBox pictureBox2;
private System.Windows.Forms.Label label1;
public Form1()
{
InitializeComponent();
}
private void pictureBox1_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
showimg();
}
Bitmap image1;
private void showimg()
{
int wd = 400;
int hg = 200;
int len = wd * hg * 3;
byte[] pdata = new byte[len];
for (int i = 0; i < len; i++)
{
if (i > 3 * wd * (hg / 2))
{
pdata[i] = 255;
}
else
{
pdata[i] = 0;
}
}
try
{
image1 = new Bitmap(wd, hg, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
for (int y = 0; y < hg; y++)
{
for (int x = 0; x < wd; x++)
{
Color crr = Color.FromArgb(pdata[3 * wd * y + x], pdata[3 * wd * y + x], pdata[3 * wd * y + x]);
image1.SetPixel(x, y, crr);
}
}
// Set the PictureBox to display the image.
// pictureBox1.Image = image1;
}
catch (ArgumentException)
{
MessageBox.Show("There was an error check data.");
}
}
Point stpoint,endpoint;
Rectangle rect1;
Point borg = new Point(20, 20);
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.DrawImage(image1, borg);
if (rect1 != null )
{
e.Graphics.DrawRectangle(new Pen(Color.Red, 1), rect1);
}
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
stpoint = new Point(e.X, e.Y);
Track_move = true;
return;
}
Track_move = false;
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && Track_move==true )
{
Track_move = false;
endpoint = new Point(e.X, e.Y);
rect1 = new Rectangle(stpoint.X, stpoint.Y, endpoint.X - stpoint.X, endpoint.Y - stpoint.Y);
Rectangle rectorg = new Rectangle(borg.X, borg.Y, image1.Width, image1.Height);
if (rect1.Width <= 0)
return;
if (rect1.Height <= 0)
return;
if (rectorg.Contains(rect1))
{
Rectangle rectadj = new Rectangle(rect1.X - borg.X, rect1.Y - borg.Y, rect1.Width, rect1.Height);
Bitmap cropimge = image1.Clone(rectadj, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
pictureBox2.Image = cropimge;
}
else
{
pictureBox2.Image = null;
}
this.Invalidate();
}
}
bool Track_move=false ;
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (Track_move)
endpoint = new Point(e.X, e.Y);
else
{
return;
}
rect1 = new Rectangle(stpoint.X, stpoint.Y, endpoint.X - stpoint.X, endpoint.Y - stpoint.Y);
Rectangle tempr = new Rectangle(rect1.X, rect1.Y, rect1.Width + 2, rect1.Height + 2);
this.Invalidate(tempr);
}
private System.ComponentModel.IContainer components = null;
private void InitializeComponent()
{
this.pictureBox2 = new System.Windows.Forms.PictureBox();
this.label1 = new System.Windows.Forms.Label();
((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).BeginInit();
this.SuspendLayout();
//
// pictureBox2
//
this.pictureBox2.Location = new System.Drawing.Point(605, 103);
this.pictureBox2.Name = "pictureBox2";
this.pictureBox2.Size = new System.Drawing.Size(227, 173);
this.pictureBox2.TabIndex = 1;
this.pictureBox2.TabStop = false;
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(602, 58);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(127, 15);
this.label1.TabIndex = 2;
this.label1.Text = "鼠標左鍵選擇裁剪";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(844, 558);
this.Controls.Add(this.label1);
this.Controls.Add(this.pictureBox2);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseMove);
((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
}
}關(guān)于使用C#怎么實現(xiàn)一個鼠標裁剪圖像功能問題的解答就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,如果你還有很多疑惑沒有解開,可以關(guān)注創(chuàng)新互聯(lián)成都網(wǎng)站設(shè)計公司行業(yè)資訊頻道了解更多相關(guān)知識。
另外有需要云服務(wù)器可以了解下創(chuàng)新互聯(lián)scvps.cn,海內(nèi)外云服務(wù)器15元起步,三天無理由+7*72小時售后在線,公司持有idc許可證,提供“云服務(wù)器、裸金屬服務(wù)器、高防服務(wù)器、香港服務(wù)器、美國服務(wù)器、虛擬主機、免備案服務(wù)器”等云主機租用服務(wù)以及企業(yè)上云的綜合解決方案,具有“安全穩(wěn)定、簡單易用、服務(wù)可用性高、性價比高”等特點與優(yōu)勢,專為企業(yè)上云打造定制,能夠滿足用戶豐富、多元化的應用場景需求。
本文題目:使用C#怎么實現(xiàn)一個鼠標裁剪圖像功能-創(chuàng)新互聯(lián)
網(wǎng)頁路徑:http://www.yijiale78.com/article0/cdpsio.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供做網(wǎng)站、手機網(wǎng)站建設(shè)、動態(tài)網(wǎng)站、商城網(wǎng)站、電子商務(wù)、外貿(mào)網(wǎng)站建設(shè)
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請盡快告知,我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時需注明來源: 創(chuàng)新互聯(lián)
猜你還喜歡下面的內(nèi)容