控件布局 主要分为一个Panel + 一个PictureBox + 还有一个自定义半透明裁切平面ExtendedPanel；
Form1.Designer.cs代码如下：
namespace ImageEditer
{
partial class ImageEdit
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要修改
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.splitContainer = new System.Windows.Forms.SplitContainer();
this.imageList = new System.Windows.Forms.Panel();
this.imageContainer = new System.Windows.Forms.Panel();
this.optPanel = new System.Windows.Forms.Panel();
this.reset = new System.Windows.Forms.Button();
this.rota180 = new System.Windows.Forms.Button();
this.rotaLeft = new System.Windows.Forms.Button();
this.rota90 = new System.Windows.Forms.Button();
this.roatRight = new System.Windows.Forms.Button();
this.vertical = new System.Windows.Forms.Button();
this.clip = new System.Windows.Forms.Button();
this.mirror = new System.Windows.Forms.Button();
this.ImageBox = new System.Windows.Forms.Panel();
this.pictureBox = new System.Windows.Forms.PictureBox();
this.clipPanel = new ImageEditer.ExtendedPanel();
((System.ComponentModel.ISupportInitialize)(this.splitContainer)).BeginInit();
this.splitContainer.Panel1.SuspendLayout();
this.splitContainer.Panel2.SuspendLayout();
this.splitContainer.SuspendLayout();
this.imageContainer.SuspendLayout();
this.optPanel.SuspendLayout();
this.ImageBox.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.pictureBox)).BeginInit();
this.SuspendLayout();
//
// splitContainer
//
this.splitContainer.BackColor = System.Drawing.Color.Transparent;
this.splitContainer.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.splitContainer.Dock = System.Windows.Forms.DockStyle.Fill;
this.splitContainer.Location = new System.Drawing.Point(0, 0);
this.splitContainer.Margin = new System.Windows.Forms.Padding(0);
this.splitContainer.Name = "splitContainer";
//
// splitContainer.Panel1
//
this.splitContainer.Panel1.Controls.Add(this.imageList);
//
// splitContainer.Panel2
//
this.splitContainer.Panel2.Controls.Add(this.imageContainer);
this.splitContainer.Panel2MinSize = 100;
this.splitContainer.Size = new System.Drawing.Size(961, 480);
this.splitContainer.SplitterDistance = 236;
this.splitContainer.SplitterWidth = 6;
this.splitContainer.TabIndex = 0;
//
// imageList
//
this.imageList.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.imageList.Location = new System.Drawing.Point(0, 0);
this.imageList.Name = "imageList";
this.imageList.Size = new System.Drawing.Size(232, 476);
this.imageList.TabIndex = 1;
//
// imageContainer
//
this.imageContainer.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.imageContainer.AutoScroll = true;
this.imageContainer.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(128)))), ((int)(((byte)(255)))));
this.imageContainer.Controls.Add(this.optPanel);
this.imageContainer.Controls.Add(this.ImageBox);
this.imageContainer.ForeColor = System.Drawing.SystemColors.ControlText;
this.imageContainer.Location = new System.Drawing.Point(0, 0);
this.imageContainer.Name = "imageContainer";
this.imageContainer.Size = new System.Drawing.Size(713, 476);
this.imageContainer.TabIndex = 0;
//
// optPanel
//
this.optPanel.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.optPanel.BackColor = System.Drawing.Color.Gray;
this.optPanel.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.optPanel.Controls.Add(this.reset);
this.optPanel.Controls.Add(this.rota180);
this.optPanel.Controls.Add(this.rotaLeft);
this.optPanel.Controls.Add(this.rota90);
this.optPanel.Controls.Add(this.roatRight);
this.optPanel.Controls.Add(this.vertical);
this.optPanel.Controls.Add(this.clip);
this.optPanel.Controls.Add(this.mirror);
this.optPanel.Location = new System.Drawing.Point(0, 0);
this.optPanel.Name = "optPanel";
this.optPanel.Size = new System.Drawing.Size(713, 26);
this.optPanel.TabIndex = 2;
//
// reset
//
this.reset.Location = new System.Drawing.Point(1, 0);
this.reset.Name = "reset";
this.reset.Size = new System.Drawing.Size(60, 23);
this.reset.TabIndex = 3;
this.reset.Text = "复位";
this.reset.UseVisualStyleBackColor = true;
//
// rota180
//
this.rota180.Location = new System.Drawing.Point(412, 0);
this.rota180.Name = "rota180";
this.rota180.Size = new System.Drawing.Size(72, 23);
this.rota180.TabIndex = 9;
this.rota180.Text = "旋转180°";
this.rota180.UseVisualStyleBackColor = true;
//
// rotaLeft
//
this.rotaLeft.Location = new System.Drawing.Point(64, 0);
this.rotaLeft.Name = "rotaLeft";
this.rotaLeft.Size = new System.Drawing.Size(60, 23);
this.rotaLeft.TabIndex = 1;
this.rotaLeft.Text = "左旋";
this.rotaLeft.UseVisualStyleBackColor = true;
//
// rota90
//
this.rota90.Location = new System.Drawing.Point(346, 0);
this.rota90.Name = "rota90";
this.rota90.Size = new System.Drawing.Size(63, 23);
this.rota90.TabIndex = 8;
this.rota90.Text = "旋转90°";
this.rota90.UseVisualStyleBackColor = true;
//
// roatRight
//
this.roatRight.Location = new System.Drawing.Point(127, 0);
this.roatRight.Name = "roatRight";
this.roatRight.Size = new System.Drawing.Size(60, 23);
this.roatRight.TabIndex = 2;
this.roatRight.Text = "右旋";
this.roatRight.UseVisualStyleBackColor = true;
//
// vertical
//
this.vertical.Location = new System.Drawing.Point(268, 0);
this.vertical.Name = "vertical";
this.vertical.Size = new System.Drawing.Size(75, 23);
this.vertical.TabIndex = 7;
this.vertical.Text = "垂直翻转";
this.vertical.UseVisualStyleBackColor = true;
//
// clip
//
this.clip.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
this.clip.Location = new System.Drawing.Point(487, 0);
this.clip.Name = "clip";
this.clip.Size = new System.Drawing.Size(68, 23);
this.clip.TabIndex = 4;
this.clip.Text = "裁切图像";
this.clip.UseVisualStyleBackColor = true;
//
// mirror
//
this.mirror.Location = new System.Drawing.Point(190, 0);
this.mirror.Name = "mirror";
this.mirror.Size = new System.Drawing.Size(75, 23);
this.mirror.TabIndex = 6;
this.mirror.Text = "水平翻转";
this.mirror.UseVisualStyleBackColor = true;
//
// ImageBox
//
this.ImageBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.ImageBox.AutoScroll = true;
this.ImageBox.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
this.ImageBox.Controls.Add(this.clipPanel);
this.ImageBox.Controls.Add(this.pictureBox);
this.ImageBox.Location = new System.Drawing.Point(0, 23);
this.ImageBox.Name = "ImageBox";
this.ImageBox.Size = new System.Drawing.Size(713, 455);
this.ImageBox.TabIndex = 5;
//
// pictureBox
//
this.pictureBox.BackColor = System.Drawing.Color.Transparent;
this.pictureBox.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.pictureBox.Location = new System.Drawing.Point(3, 6);
this.pictureBox.Margin = new System.Windows.Forms.Padding(0);
this.pictureBox.Name = "pictureBox";
this.pictureBox.Size = new System.Drawing.Size(59, 49);
this.pictureBox.TabIndex = 0;
this.pictureBox.TabStop = false;
//
// clipPanel
//
this.clipPanel.BackColor = System.Drawing.Color.Transparent;
this.clipPanel.Cursor = System.Windows.Forms.Cursors.Default;
this.clipPanel.Location = new System.Drawing.Point(80, 9);
this.clipPanel.Name = "clipPanel";
this.clipPanel.Size = new System.Drawing.Size(45, 41);
this.clipPanel.TabIndex = 1;
//
// ImageEdit
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(961, 480);
this.Controls.Add(this.splitContainer);
this.Name = "ImageEdit";
this.Text = "图像";
this.SizeChanged += new System.EventHandler(this.ImageEdit_ResizeBegin);
this.splitContainer.Panel1.ResumeLayout(false);
this.splitContainer.Panel2.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.splitContainer)).EndInit();
this.splitContainer.ResumeLayout(false);
this.imageContainer.ResumeLayout(false);
this.optPanel.ResumeLayout(false);
this.ImageBox.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.pictureBox)).EndInit();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.SplitContainer splitContainer;
private System.Windows.Forms.Panel imageContainer;
private System.Windows.Forms.Button rotaLeft;
private System.Windows.Forms.Button roatRight;
private System.Windows.Forms.Button reset;
private System.Windows.Forms.Button clip;
private System.Windows.Forms.Panel ImageBox;
private System.Windows.Forms.Panel imageList;
private System.Windows.Forms.PictureBox pictureBox;
private ExtendedPanel clipPanel;
private System.Windows.Forms.Button vertical;
private System.Windows.Forms.Button mirror;
private System.Windows.Forms.Button rota90;
private System.Windows.Forms.Button rota180;
private System.Windows.Forms.Panel optPanel;
}
}
自定义半透明裁切平面ExtendedPanel代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace ImageEditer
{
internal class ExtendedPanel : Panel
{
private const int WS_EX_TRANSPARENT = 0x20;
public ExtendedPanel()
{
SetStyle(ControlStyles.Opaque, true);
}
private int opacity = 50;
[DefaultValue(50)]
public int Opacity
{
get
{
return this.opacity;
}
set
{
if (value < 0 || value > 100)
throw new ArgumentException("value must be between 0 and 100");
this.opacity = value;
}
}
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle = cp.ExStyle | WS_EX_TRANSPARENT;
return cp;
}
}
protected override void OnPaint(PaintEventArgs e)
{
using (var brush = new SolidBrush(Color.FromArgb(this.opacity * 255 / 100, this.BackColor)))
{
e.Graphics.FillRectangle(brush, this.ClientRectangle);
e.Graphics.DrawRectangle(new Pen(Color.Red, 2), this.ClientRectangle);
}
base.OnPaint(e);
}
}
}
图片的缩放、平移操作PictureBox,图片的旋转，镜像主要操作 PictureBox里的Image，图片的裁切主要通过操作自定义的ExtendedPanel大小来计算裁切后的尺寸及位置，通过转换计算PictureBox里的Image真实裁切尺寸。
主代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Security.Policy;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.Window;
namespace ImageEditer
{
public partial class ImageEdit : Form
{
private static int rotaNum = 0; // 旋转角度
private static float zoomNum = 1.0f; // 缩放比例 未使用
private static int pointRadis = 12; // 裁切点大小
private static Boolean clipMode = false; // 是否开启裁切
private static Pen rotaPen = new Pen(Color.Blue, 10); // 旋转颜色 未使用
private static Pen clipPen = new Pen(Color.Red, 10); // 裁切颜色
private static string imagePath = null; // 图像路径
private static Image sourceImage = null; // 初始输入图像源
private static Image outputImage = null; // 初始输出图像源 未使用
private static PictureBox currentPictureBox = null; // 当前图像容器
private static Panel currentImageBox = null; // 当前图像panel
private static Panel currentClipPanel = null; // 裁切平面
private static Point one = new Point(0, 0); // 裁切调整坐标1
private static Point two = new Point(0, 0); // 裁切调整坐标2
private static Point three = new Point(0, 0); // 裁切调整坐标3
private static Point four = new Point(0, 0); // 裁切调整坐标4
private static PictureBox OneButton = new PictureBox(); // 裁切调整点1
private static PictureBox TwoButton = new PictureBox(); // 裁切调整点2
private static PictureBox ThreeButton = new PictureBox(); // 裁切调整点3
private static PictureBox FourButton = new PictureBox(); // 裁切调整点4
private static System.Drawing.Rectangle clipRect = new System.Drawing.Rectangle(0, 0, 0, 0); // 裁切矩形信息
public Point mouseDownPoint; // 记录鼠标点击坐标
public bool isSelected = false; // 是否点击图像
public bool isClicked = false; // 是否点击裁切矩形
public bool isClickedOne = false; // 是否点解裁切矩形调整点1
public bool isClickedTwo = false; // 是否点解裁切矩形调整点2
public bool isClickedThree = false; // 是否点解裁切矩形调整点3
public bool isClickedFour = false; // 是否点解裁切矩形调整点4
public ImageEdit(){
InitializeComponent();
imagePath = @"D:\1.jpg";
this.init(this.ImageBox, this.pictureBox, imagePath);
}
/**
* 初始化组件及事件
*/
public void init(Panel currentImage, PictureBox pictureBox, string path) {
imagePath = path.Trim();
sourceImage = Image.FromFile(path);
currentImageBox = currentImage;
/************************按钮事件**************************/
this.reset.Click += new System.EventHandler(this.reset_Click);
this.rotaLeft.Click += new System.EventHandler(this.roatleft_Click);
this.roatRight.Click += new System.EventHandler(this.roatRight_Click);
this.rota90.Click += new System.EventHandler(this.roat90_Click);
this.rota180.Click += new System.EventHandler(this.roat180_Click);
this.mirror.Click += new System.EventHandler(this.mirror_Click);
this.vertical.Click += new System.EventHandler(this.vertical_Click);
this.clip.Click += new System.EventHandler(this.clip_Click);
currentPictureBox = pictureBox;
currentPictureBox.Location = new Point(0, 0);
currentPictureBox.Width = 0;
currentPictureBox.Height = 0;
currentPictureBox.Image = sourceImage;
currentPictureBox.Width = sourceImage.Width;
currentPictureBox.Height = sourceImage.Height;
currentPictureBox.SizeMode = PictureBoxSizeMode.Zoom;
this.SizeChanged += new EventHandler(this.ImageEdit_ResizeBegin);
currentPictureBox.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.pictureBox_MouseWheel);
currentPictureBox.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pictureBox_MouseDown);
currentPictureBox.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pictureBox_MouseMove);
currentPictureBox.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pictureBox_MouseUp);
/************************裁切框组件**************************/
OneButton.Size = new Size(pointRadis, pointRadis);
TwoButton.Size = new Size(pointRadis, pointRadis);
ThreeButton.Size = new Size(pointRadis, pointRadis);
FourButton.Size = new Size(pointRadis, pointRadis);
OneButton.BackColor = Color.Red;
TwoButton.BackColor = Color.Red;
ThreeButton.BackColor = Color.Red;
FourButton.BackColor = Color.Red;
OneButton.Visible = clipMode;
TwoButton.Visible = clipMode;
ThreeButton.Visible = clipMode;
FourButton.Visible = clipMode;
FourButton.TabIndex = 10000;
currentImageBox.Controls.Add(OneButton);
currentImageBox.Controls.Add(TwoButton);
currentImageBox.Controls.Add(ThreeButton);
currentImageBox.Controls.Add(FourButton);
currentImageBox.Controls.Add(pictureBox);
currentClipPanel = this.clipPanel;
currentClipPanel.BackColor = Color.Transparent;
currentClipPanel.Visible = false;
currentClipPanel.Location = new Point(0, 0);
currentClipPanel.Width = 0;
currentClipPanel.Height = 0;
currentClipPanel.MouseDown += new System.Windows.Forms.MouseEventHandler(this.clip_MouseDown);
currentClipPanel.MouseMove += new System.Windows.Forms.MouseEventHandler(this.clip_MouseMove);
currentClipPanel.MouseUp += new System.Windows.Forms.MouseEventHandler(this.clip_MouseUp);
OneButton.MouseDown += new System.Windows.Forms.MouseEventHandler(this.One_MouseDown);
OneButton.MouseMove += new System.Windows.Forms.MouseEventHandler(this.One_MouseMove);
OneButton.MouseUp += new System.Windows.Forms.MouseEventHandler(this.One_MouseUp);
TwoButton.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Two_MouseDown);
TwoButton.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Two_MouseMove);
TwoButton.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Two_MouseUp);
ThreeButton.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Three_MouseDown);
ThreeButton.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Three_MouseMove);
ThreeButton.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Three_MouseUp);
FourButton.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Four_MouseDown);
FourButton.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Four_MouseMove);
FourButton.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Four_MouseUp);
clipRect.X = 0;
clipRect.Y = 0;
clipRect.Width = currentPictureBox.Image.Width;
clipRect.Height = currentPictureBox.Image.Height;
resetImageToPanel();
}
/************************窗口事件**************************/
/**
* 窗口变化时候
*/
private void ImageEdit_ResizeBegin(object sender, EventArgs e)
{
resetImageToPanel();
}
/************************居中显示**************************/
/**
* 缩放图片到panel 居中
*/
private static void resetImageToPanel()
{
int windowWidth = currentImageBox.Width;
int windowHeight = currentImageBox.Height;
int imageWidth = clipRect.Width;
int imageHeight = clipRect.Height;
if (imageWidth >= imageHeight)
{
if (imageWidth > windowWidth)
{
double scaleHeight = (double)windowWidth / imageWidth * imageHeight;
currentPictureBox.Width = windowWidth;
currentPictureBox.Height = (int)scaleHeight;
}
else {
currentPictureBox.Width = (int)windowWidth;
currentPictureBox.Height = (int)windowHeight;
}
}
else
{
if (imageHeight > windowHeight)
{
double scaleWidth = (double)windowHeight / imageHeight * imageWidth;
currentPictureBox.Height = windowHeight;
currentPictureBox.Width = (int)scaleWidth;
}
else {
currentPictureBox.Width = (int)windowWidth;
currentPictureBox.Height = (int)windowHeight;
}
}
int X = (windowWidth - currentPictureBox.Width) / 2;
int Y = (windowHeight - currentPictureBox.Height) / 2;
currentPictureBox.Location = new Point(X, Y);
}
/************************按钮事件**************************/
// 复位
private void reset_Click(object sender, EventArgs e)
{
rotaNum = 0;
resetImageToPanel();
}
// 左旋
private void roatleft_Click(object sender, EventArgs e)
{
currentPictureBox.Image = RotateImage(sourceImage, rotaNum -= 5);
}
// 右旋
private void roatRight_Click(object sender, EventArgs e)
{
currentPictureBox.Image = RotateImage(sourceImage, rotaNum += 5);
}
// 旋转90度
private void roat90_Click(object sender, EventArgs e)
{
currentPictureBox.Image = RotateImage(sourceImage, rotaNum -= 90);
}
// 旋转180度
private void roat180_Click(object sender, EventArgs e)
{
currentPictureBox.Image = RotateImage(sourceImage, rotaNum -= 180);
}
// 水平镜像
private void mirror_Click(object sender, EventArgs e)
{
//currentPictureBox.Image = RotateImage(sourceImage, rotaNum);
currentPictureBox.Image = turnOverImage(currentPictureBox.Image, "mirror");
}
// 垂直镜像
private void vertical_Click(object sender, EventArgs e)
{
//currentPictureBox.Image = RotateImage(sourceImage, rotaNum);
currentPictureBox.Image = turnOverImage(currentPictureBox.Image, "vertical");
}
// 裁切
private void clip_Click(object sender, EventArgs e)
{
clipMode = !clipMode;
if (clipMode)
{
this.clip.BackColor = Color.Blue;
this.clip.ForeColor = Color.White;
this.beginPainting();
}
else
{
this.clip.BackColor = Color.Transparent;
this.clip.ForeColor = Color.Black;
this.overPainting();
}
}
/************************图像鼠标事件**************************/
private void pictureBox_MouseWheel(object sender, MouseEventArgs e)
{
if (currentPictureBox.ClientRectangle.Contains(e.Location))
{
((HandledMouseEventArgs)e).Handled = true;
currentPictureBox.Focus();
float zoomChange = e.Delta > 0 ? 2f : 0.5f;
// Debug.WriteLine(e.Delta);
// 计算缩放后图片的大小
int newWidth = (int)(currentPictureBox.Width * zoomChange);
int newHeight = (int)(currentPictureBox.Height * zoomChange);
int newX = 0;
int newY = 0;
if (e.Delta > 0)
{
newX = (int)(currentPictureBox.Left - e.X);
newY = (int)(currentPictureBox.Top - e.Y);
}
else
{
newX = (int)(currentPictureBox.Left + e.X / 2);
newY = (int)(currentPictureBox.Top + e.Y / 2);
}
currentPictureBox.Size = new Size(newWidth, newHeight);
currentPictureBox.Location = new Point(newX, newY);
}
}
private void pictureBox_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
isSelected = true;
}
}
private void pictureBox_MouseMove(object sender, MouseEventArgs e)
{
if (isSelected)//确定已经激发MouseDown事件，和鼠标在picturebox的范围内
{
currentPictureBox.Left = currentPictureBox.Left + (Cursor.Position.X - mouseDownPoint.X);
currentPictureBox.Top = currentPictureBox.Top + (Cursor.Position.Y - mouseDownPoint.Y);
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
Cursor.Current = Cursors.SizeAll;
}
else
{
Cursor.Current = Cursors.Default;
}
}
private void pictureBox_MouseUp(object sender, MouseEventArgs e)
{
isSelected = false;
}
/*************************裁切平面鼠标事件*************************/
private void clip_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
isClicked = true;
}
}
private void clip_MouseMove(object sender, MouseEventArgs e)
{
if (isClicked)
{
int dotaX = mouseDownPoint.X - Cursor.Position.X;
int dotaY = mouseDownPoint.Y - Cursor.Position.Y;
currentClipPanel.Left = currentClipPanel.Left - dotaX;
currentClipPanel.Top = currentClipPanel.Top - dotaY;
// 刷新第一、二、三、四个点位置
int newOneX = currentClipPanel.Location.X + currentClipPanel.Width / 2 - pointRadis / 2;
int newTwoY = currentClipPanel.Location.Y + currentClipPanel.Height / 2 - pointRadis / 2;
OneButton.Location = new Point(newOneX, currentClipPanel.Location.Y - pointRadis / 2);
ThreeButton.Location = new Point(newOneX, currentClipPanel.Location.Y + currentClipPanel.Height - pointRadis / 2);
TwoButton.Location = new Point(currentClipPanel.Location.X + currentClipPanel.Width - pointRadis / 2, newTwoY);
FourButton.Location = new Point(currentClipPanel.Location.X - pointRadis / 2, newTwoY);
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
}
}
private void clip_MouseUp(object sender, MouseEventArgs e)
{
isClicked = false;
}
/*************************第一个点鼠标事件*************************/
private void One_MouseDown(object sender, MouseEventArgs e) {
Cursor.Current = Cursors.SizeNS;
if (e.Button == MouseButtons.Left)
{
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
isClickedOne = true;
}
}
private void One_MouseMove(object sender, MouseEventArgs e)
{
if (isClickedOne) {
Cursor.Current = Cursors.SizeNS;
int dotaY = mouseDownPoint.Y - Cursor.Position.Y;
if (ThreeButton.Location.Y - OneButton.Location.Y > 50 || dotaY > 0) {
// 计算高度和位置
currentClipPanel.Height = currentClipPanel.Height + dotaY;
int newY = currentClipPanel.Location.Y - dotaY;
currentClipPanel.Location = new Point(currentClipPanel.Location.X, newY);
int newPointY = OneButton.Location.Y - dotaY;
OneButton.Location = new Point(OneButton.Location.X, newPointY);
// 刷新第二、四个点位置
int newTwoY = currentClipPanel.Location.Y + currentClipPanel.Height / 2 - pointRadis / 2;
TwoButton.Location = new Point(TwoButton.Location.X, newTwoY);
FourButton.Location = new Point(FourButton.Location.X, newTwoY);
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
}
}
}
private void One_MouseUp(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.Default;
isClickedOne = false;
}
/*************************第二个点鼠标事件*************************/
private void Two_MouseDown(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.SizeWE;
if (e.Button == MouseButtons.Left)
{
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
isClickedTwo = true;
}
}
private void Two_MouseMove(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.SizeWE;
if (isClickedTwo)
{
int dotaX = mouseDownPoint.X - Cursor.Position.X;
if (TwoButton.Location.X - FourButton.Location.X > 50 || dotaX < 0) {
// 计算宽度和位置
currentClipPanel.Width -= dotaX;
int newPointX = TwoButton.Location.X - dotaX;
TwoButton.Location = new Point(newPointX, TwoButton.Location.Y);
// 刷新第一、三个点位置
int newOneX = currentClipPanel.Location.X + currentClipPanel.Width / 2 - pointRadis / 2;
OneButton.Location = new Point(newOneX, OneButton.Location.Y);
ThreeButton.Location = new Point(newOneX, ThreeButton.Location.Y);
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
}
}
}
private void Two_MouseUp(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.Default;
isClickedTwo = false;
}
/*************************第三个点鼠标事件*************************/
private void Three_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
isClickedThree = true;
}
}
private void Three_MouseMove(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.SizeNS;
if (isClickedThree)
{
int dotaY = mouseDownPoint.Y - Cursor.Position.Y;
if (ThreeButton.Location.Y - OneButton.Location.Y > 50 || dotaY < 0)
{
// 计算高度和位置
currentClipPanel.Height = currentClipPanel.Height - dotaY;
int newPointY = ThreeButton.Location.Y - dotaY;
ThreeButton.Location = new Point(ThreeButton.Location.X, newPointY);
// 刷新第二、四个点位置
int newTwoY = currentClipPanel.Location.Y + currentClipPanel.Height / 2 - pointRadis / 2;
TwoButton.Location = new Point(TwoButton.Location.X, newTwoY);
FourButton.Location = new Point(FourButton.Location.X, newTwoY);
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
}
}
}
private void Three_MouseUp(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.Default;
isClickedThree = false;
}
/*************************第四个点鼠标事件*************************/
private void Four_MouseDown(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.SizeWE;
if (e.Button == MouseButtons.Left)
{
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
isClickedFour = true;
}
}
private void Four_MouseMove(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.SizeWE;
if (isClickedFour)
{
// 计算宽度和位置
int dotaX = mouseDownPoint.X - Cursor.Position.X;
if (TwoButton.Location.X - FourButton.Location.X > 50 || dotaX > 0)
{
currentClipPanel.Width += dotaX;
int newX = currentClipPanel.Location.X - dotaX;
currentClipPanel.Location = new Point(newX, currentClipPanel.Location.Y);
int newPointX = FourButton.Location.X - dotaX;
FourButton.Location = new Point(newPointX, FourButton.Location.Y);
// 刷新第一、三个点位置
int newOneX = currentClipPanel.Location.X + currentClipPanel.Width / 2 - pointRadis / 2;
OneButton.Location = new Point(newOneX, OneButton.Location.Y);
ThreeButton.Location = new Point(newOneX, ThreeButton.Location.Y);
mouseDownPoint.X = Cursor.Position.X;
mouseDownPoint.Y = Cursor.Position.Y;
}
}
}
private void Four_MouseUp(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.Default;
isClickedFour = false;
}
/***************************功能方法***********************/
/**
* 绘制裁切框
*/
private void beginPainting()
{
Debug.WriteLine("====beginPainting====");
OneButton.Visible = clipMode;
TwoButton.Visible = clipMode;
ThreeButton.Visible = clipMode;
FourButton.Visible = clipMode;
currentPictureBox.Image = RotateImage(sourceImage, rotaNum);
currentPictureBox.Refresh();
// 初始化位置
setDefaultClipButtonPosition();
currentClipPanel.Visible = clipMode;
}
/**
* 结束绘制
*/
private void overPainting()
{
Debug.WriteLine("====overPainting====");
OneButton.Visible = clipMode;
TwoButton.Visible = clipMode;
ThreeButton.Visible = clipMode;
FourButton.Visible = clipMode;
currentPictureBox.Image = RotateImage(sourceImage, rotaNum);
currentImageBox.Refresh();
// 裁切
clipBitmap();
currentClipPanel.Visible = clipMode;
}
/**
* 初始化裁切框调整按钮到图像尺寸
*/
private static void setDefaultClipButtonPosition()
{
int halfButton = pointRadis / 2 ;
// 设置拖拉按钮
one.X = currentPictureBox.Location.X + currentPictureBox.Width / 2 - halfButton;
one.Y = currentPictureBox.Location.Y - halfButton;
OneButton.Location = one;
two.X = currentPictureBox.Location.X + currentPictureBox.Width - halfButton;
two.Y = currentPictureBox.Location.Y + currentPictureBox.Height / 2 - halfButton;
TwoButton.Location = two;
three.X = one.X;
three.Y = currentPictureBox.Location.Y + currentPictureBox.Height - halfButton;
ThreeButton.Location = three;
four.X = currentPictureBox.Location.X - halfButton;
four.Y = two.Y;
FourButton.Location = four;
currentClipPanel.Location = currentPictureBox.Location;
currentClipPanel.Width = currentPictureBox.Width;
currentClipPanel.Height = currentPictureBox.Height;
Graphics graphicsClip = OneButton.CreateGraphics();
graphicsClip.DrawRectangle(clipPen, clipRect);
graphicsClip.Dispose();
}
/**
* 裁切图片
*/
private static void clipBitmap() {
Image srcImage = currentPictureBox.Image;
int X = currentClipPanel.Location.X - currentPictureBox.Location.X;
int Y = currentClipPanel.Location.Y - currentPictureBox.Location.Y;
X = X < 0 ? 0 : X * srcImage.Width / currentPictureBox.Width;
Y = Y < 0 ? 0 : Y * srcImage.Height / currentPictureBox.Height;
int Width = currentClipPanel.Width * srcImage.Width / currentPictureBox.Width;
int Height = currentClipPanel.Height * srcImage.Height / currentPictureBox.Height;
// 创建新图位图
Bitmap bitmap = new Bitmap(Width, Height);
bitmap.SetResolution(srcImage.HorizontalResolution, srcImage.VerticalResolution);
// 创建作图区域
Graphics graphic = Graphics.FromImage(bitmap);
graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
graphic.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.Half;
// 截取原图相应区域写入作图区
Rectangle cRect = new Rectangle(X,Y, Width, Height);
graphic.DrawImage(srcImage, 0, 0, cRect, GraphicsUnit.Pixel);
graphic.Dispose();
Debug.WriteLine("SourceWidth===========>" + sourceImage.Width);
Debug.WriteLine("SourceHeight===========>" + sourceImage.Height);
Debug.WriteLine("Width===========>" + bitmap.Width);
Debug.WriteLine("Height===========>" + bitmap.Height);
//从作图区生成新图
// currentPictureBox.Image = Image.FromHbitmap( bitmap.GetHbitmap() );
/********刷新图像*********/
currentPictureBox.Image = bitmap;
sourceImage = bitmap;
rotaNum = 0;
currentImageBox.Refresh();
clipRect.X = 0;
clipRect.Y = 0;
clipRect.Width = Width;
clipRect.Height = Height;
/********刷新图像*********/
resetImageToPanel();
}
/**
* 旋转图像
*/
private static Bitmap RotateImage(Image image, float angle)
{
if (image == null)
{
throw new ArgumentNullException("image");
}
// 获取中心点
float halfWidth = image.Width / 2.0f;
float halfHeight = image.Height / 2.0f;
// 弧度转换
angle = angle % 360;
double radian = angle * Math.PI / 180.0;
double cos = Math.Cos(radian);
double sin = Math.Sin(radian);
int width = image.Width;
int height = image.Height;
// 计算旋转后的图像容器长宽
int resultWidth = (int)(Math.Max(Math.Abs(width * cos - height * sin), Math.Abs(width * cos + height * sin)));
int resultHeight = (int)(Math.Max(Math.Abs(width * sin - height * cos), Math.Abs(width * sin + height * cos)));
float centerX = resultWidth / 2;
float centerY = resultHeight / 2;
// 设置新的图像容器
Bitmap newImage = new Bitmap(resultWidth, resultHeight);
newImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
Graphics graphics = Graphics.FromImage(newImage);
// 平移图像到中心点
graphics.TranslateTransform(centerX, centerY);
// 旋转
graphics.RotateTransform(angle);
// 再次平移回来
graphics.TranslateTransform(-centerX, -centerY);
// 将图片绘制到中心点上
float resultX = centerX - halfWidth;
float resultY = centerY - halfHeight;
graphics.DrawImage(image, new PointF(resultX, resultY));
graphics.Dispose();
clipRect.X = 0;
clipRect.Y = 0;
clipRect.Width = resultWidth;
clipRect.Height = resultHeight;
resetImageToPanel();
// 如果是裁切将显示裁切框
/*if (clipMode)
{
Graphics graphicsClip = Graphics.FromImage(newImage);
graphicsClip.DrawRectangle(rotaPen, clipRect);
graphicsClip.Dispose();
}*/
/*Graphics graphicsClip = Graphics.FromImage(newImage);
graphicsClip.DrawRectangle(rotaPen, clipRect);
graphicsClip.Dispose();*/
return newImage;
}
/**
* 水平镜像
*/
private static Image turnOverImage(Image image, string mode) {
Graphics g = Graphics.FromImage(image);
Rectangle rect = new Rectangle(0, 0, currentPictureBox.Image.Width, currentPictureBox.Image.Height);
switch (mode) {
case "mirror":
image.RotateFlip(RotateFlipType.RotateNoneFlipX);
break;
case "vertical":
image.RotateFlip(RotateFlipType.RotateNoneFlipY);
break;
}
g.DrawImage(image, rect);
g.Dispose();
return image;
}
}
}
目前只实现了这些，效率和内存方面还没有进行测试，计划添加文字标注和图片导出功能。
代码地址：https://github.com/suojianwen95/ImageEditer.git
标签：currentPictureBox,裁切,C#,System,Forms,Windows,图像处理,Location,new From： https://www.cnblogs.com/suoyiling/p/18107875