使用C#怎么實(shí)現(xiàn)一個(gè)鼠標(biāo)裁剪圖像功能?針對(duì)這個(gè)問(wèn)題,這篇文章詳細(xì)介紹了相對(duì)應(yīng)的分析和解答,希望可以幫助更多想解決這個(gè)問(wèn)題的小伙伴找到更簡(jiǎn)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(gè)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(yīng)用程序的主入口點(diǎn)。 /// </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(biāo)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(shí)現(xiàn)一個(gè)鼠標(biāo)裁剪圖像功能問(wèn)題的解答就分享到這里了,希望以上內(nèi)容可以對(duì)大家有一定的幫助,如果你還有很多疑惑沒(méi)有解開(kāi),可以關(guān)注創(chuàng)新互聯(lián)成都網(wǎng)站設(shè)計(jì)公司行業(yè)資訊頻道了解更多相關(guān)知識(shí)。
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(wú)理由+7*72小時(shí)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(guó)服務(wù)器、虛擬主機(jī)、免備案服務(wù)器”等云主機(jī)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(jiǎn)單易用、服務(wù)可用性高、性價(jià)比高”等特點(diǎn)與優(yōu)勢(shì),專為企業(yè)上云打造定制,能夠滿足用戶豐富、多元化的應(yīng)用場(chǎng)景需求。
本文題目:使用C#怎么實(shí)現(xiàn)一個(gè)鼠標(biāo)裁剪圖像功能-創(chuàng)新互聯(lián)
網(wǎng)頁(yè)路徑:http://aaarwkj.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(jī)網(wǎng)站建設(shè)、動(dòng)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(qǐng)盡快告知,我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如需處理請(qǐng)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(shí)需注明來(lái)源: 創(chuàng)新互聯(lián)
猜你還喜歡下面的內(nèi)容