C# 仿qq截图功能 例子完整源码下载

仿qq截图功能，如下图

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Imaging;using System.Drawing.Drawing2D;using System.Threading;namespace CSharpWin_JD.CaptureImage{ public partial class CaptureImageTool : Form { /// <summary> /// 遮罩层颜色 /// </summary> private static SolidBrush mask = new SolidBrush(Color.FromArgb(100, 0, 0, 0)); /// <summary> /// 原始屏幕图 /// </summary> private Image ScreenImage; #region Fields private Image _image; private CaptureImageToolColorTable _colorTable; private Cursor _selectCursor = Cursors.Default; private Cursor _drawCursor = Cursors.Cross; private Point _mouseDownPoint; private Point _endPoint; private bool _mouseDown; private Rectangle _selectImageRect; private Rectangle _selectImageBounds; private bool _selectedImage; private SizeGrip _sizeGrip; private Dictionary<SizeGrip,Rectangle> _sizeGripRectList; private OperateManager _operateManager; private List<Point> _linePointList; private static readonly Font TextFont = new Font("Times New Roman", 12F, FontStyle.Bold, GraphicsUnit.Point, 0); private static readonly string ToolTipStartCapture = "按住左键不放选择截图区域"; #endregion #region Constructors public CaptureImageTool() { InitializeComponent(); Init(); } #endregion #region Properties [Browsable(false)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] public CaptureImageToolColorTable ColorTable { get { if (_colorTable == null) { _colorTable = new CaptureImageToolColorTable(); } return _colorTable; } set { _colorTable = value; base.Invalidate(); SetControlColorTable(); } } private void SetControlColorTable() { CaptureImageToolColorTable colorTable = ColorTable; ToolStripRendererEx renderer = new ToolStripRendererEx(colorTable); contextMenuStrip.Renderer = renderer; drawToolsControl.ColorTable = colorTable; colorSelector.ColorTable = colorTable; } public Image Image { get { return _image; } } public Cursor SelectCursor { get { return _selectCursor; } set { _selectCursor = value; } } public Cursor DrawCursor { get { return _drawCursor; } set { _drawCursor = value; } } internal bool SelectedImage { get { return _selectedImage; } set { _selectedImage = value; } } internal Rectangle SelectImageRect { get { return _selectImageRect; } set { _selectImageRect = value; if (!_selectImageRect.IsEmpty) { CalCulateSizeGripRect(); base.Invalidate(); } } } internal SizeGrip SizeGrip { get { return _sizeGrip; } set { _sizeGrip = value; } } internal Dictionary<SizeGrip, Rectangle> SizeGripRectList { get { if (_sizeGripRectList == null) { _sizeGripRectList = new Dictionary<SizeGrip,Rectangle>(); } return _sizeGripRectList; } } internal OperateManager OperateManager { get { if (_operateManager == null) { _operateManager = new OperateManager(); } return _operateManager; } } private DrawStyle DrawStyle { get { return drawToolsControl.DrawStyle; } } private Color SelectedColor { get { return colorSelector.SelectedColor; } } private int FontSize { get { return colorSelector.FontSize; } } private List<Point> LinePointList { get { if (_linePointList == null) { _linePointList = new List<Point>(100); } return _linePointList; } } #endregion #region Override Methods protected override void OnLoad(EventArgs e) { base.OnLoad(e); toolTip.SetToolTip(this, ToolTipStartCapture); } protected override void OnMouseEnter(EventArgs e) { base.OnMouseEnter(e); Cursor = SelectCursor; if (!SelectedImage) { this.Invalidate(true); this.Update(); } } protected override void OnMouseDown(MouseEventArgs e) { base.OnMouseDown(e); if (textBox.Visible) { if (SelectImageRect.Contains(e.Location) || e.Button == MouseButtons.Left) { string text = textBox.Text; Font font = textBox.Font; Color color = textBox.ForeColor; HideTextBox(); if (OperateManager.OperateCount > 0) { OperateObject obj = OperateManager.OperateList[OperateManager.OperateCount - 1]; if (obj.OperateType == OperateType.DrawText) { DrawTextData textData = obj.Data as DrawTextData; if (!textData.Completed) { if (string.IsNullOrEmpty(text)) { OperateManager.RedoOperate(); } else { obj.Color = color; textData.Font = font; textData.Text = text; textData.Completed = true; } } } } } base.Invalidate(); return; } if (e.Button == MouseButtons.Left) { if (SelectedImage) { if (SizeGrip != SizeGrip.None) { _mouseDown = true; _mouseDownPoint = e.Location; HideDrawToolsControl(); base.Invalidate(); } if (DrawStyle != DrawStyle.None) { if (SelectImageRect.Contains(e.Location)) { _mouseDown = true; _mouseDownPoint = e.Location; if (DrawStyle == DrawStyle.Line) { LinePointList.Add(_mouseDownPoint); } ClipCursor(false); } } } else { _mouseDown = true; _mouseDownPoint = e.Location; } } } protected override void OnMouseMove(MouseEventArgs e) { base.OnMouseMove(e); if (_mouseDown) { if (!SelectedImage) { SelectImageRect = GetSelectImageRect(e.Location); } else { if (DrawStyle != DrawStyle.None) { _endPoint = e.Location; if (DrawStyle == DrawStyle.Line) { LinePointList.Add(_endPoint); } base.Invalidate(); } else if (SizeGrip != SizeGrip.None) { ChangeSelctImageRect(e.Location); } } } else { if (!SelectedImage) { toolTip.SetToolTip(this, ToolTipStartCapture); } else { if (DrawStyle == DrawStyle.None) { if (OperateManager.OperateCount == 0) { SetSizeGrip(e.Location); } } else { if(SelectImageRect.Contains(e.Location)) { Cursor = DrawCursor; } else { Cursor = SelectCursor; } } } } } protected override void OnMouseUp(MouseEventArgs e) { base.OnMouseUp(e); if (e.Button == MouseButtons.Left) { if (!SelectedImage) { SelectImageRect = GetSelectImageRect(e.Location); if (!SelectImageRect.IsEmpty) { SelectedImage = true; ShowDrawToolsControl(); } } else { _endPoint = e.Location; base.Invalidate(); if (DrawStyle != DrawStyle.None) { ClipCursor(true); AddOperate(e.Location); } else if (SizeGrip != SizeGrip.None) { _selectImageBounds = SelectImageRect; ShowDrawToolsControl(); SizeGrip = SizeGrip.None; } } _mouseDown = false; _mouseDownPoint = Point.Empty; } else if (e.Button == MouseButtons.Right) { if (SelectedImage) { if (SelectImageRect.Contains(e.Location)) { contextMenuStrip.Show(this, e.Location); contextMenuStripVisible = true; } else { ResetSelectImage(); } } else { DialogResult = DialogResult.Cancel; } } } protected override void OnMouseDoubleClick(MouseEventArgs e) { base.OnMouseDoubleClick(e); bool contains = SelectImageRect.Contains(e.Location); if (e.Button == MouseButtons.Left) { if (contains) { DrawLastImage(); DialogResult = DialogResult.OK; } } else if (e.Button == MouseButtons.Right) { if (!contains) { DialogResult = DialogResult.Cancel; } } } protected override void OnPaint(PaintEventArgs e) { //if (SelectImageRect.IsEmpty) //{ // base.OnPaint(e); // return; //} base.OnPaint(e); //将所选择区域原色显示 //画突出显示的部分 Graphics oldg = e.Graphics; oldg.DrawImage(this.ScreenImage, SelectImageRect, SelectImageRect, GraphicsUnit.Pixel); Graphics g = e.Graphics; g.SmoothingMode = SmoothingMode.AntiAlias; if (SelectImageRect.Width != 0 && SelectImageRect.Height != 0 ) { Rectangle rect = SelectImageRect; CaptureImageToolColorTable colorTable = ColorTable; if (_mouseDown) { if (!SelectedImage || SizeGrip != SizeGrip.None) { using (SolidBrush brush = new SolidBrush( Color.FromArgb(0, colorTable.BackColorNormal))) { g.FillRectangle(brush, rect); } DrawImageSizeInfo(g, rect); } } using (Pen pen = new Pen(colorTable.BorderColor)) { g.DrawRectangle(pen, rect); using (SolidBrush brush = new SolidBrush(colorTable.BackColorPressed)) { foreach (Rectangle sizeGripRect in SizeGripRectList.Values) { g.FillRectangle( brush, sizeGripRect); } } } DrawOperate(g); if (DrawStyle != DrawStyle.None) { DrawTools(g, _endPoint); } } } protected override void OnClosing(CancelEventArgs e) { base.OnClosing(e); if (_sizeGripRectList != null) { _sizeGripRectList.Clear(); _sizeGripRectList = null; } if (_operateManager != null) { _operateManager.Dispose(); _operateManager = null; } if (_linePointList != null) { _linePointList.Clear(); _linePointList = null; } _selectCursor = null; _drawCursor = null; } #endregion #region Draw Methods private void DrawImageSizeInfo(Graphics g, Rectangle rect) { string text = string.Format( "{0}x{1}", rect.Width, rect.Height); Size textSize = TextRenderer.MeasureText(text, TextFont); Rectangle screenBounds = Screen.GetBounds(this); int x = 0; int y = 0; if (rect.X textSize.Width > screenBounds.Right - 3) { x = screenBounds.Right - textSize.Width - 3; } else { x = rect.X 2; } if (rect.Y - textSize.Width < screenBounds.Y 3) { y = rect.Y 2; } else { y = rect.Y - textSize.Height - 2; } Rectangle textRect = new Rectangle( x, y, textSize.Width, textSize.Height); g.FillRectangle(Brushes.Black, textRect); TextRenderer.DrawText( g, text, TextFont, textRect, Color.White); } private void DrawTools(Graphics g, Point point) { if (!SelectImageRect.Contains(_mouseDownPoint)) { return; } Color color = SelectedColor; switch (DrawStyle) { case DrawStyle.Rectangle: using (Pen pen = new Pen(color)) { g.DrawRectangle( pen, ImageBoundsToRect(Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, point.X, point.Y))); } break; case DrawStyle.Ellipse: using (Pen pen = new Pen(color)) { g.DrawEllipse( pen, ImageBoundsToRect(Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, point.X, point.Y))); } break; case DrawStyle.Arrow: using (Pen pen = new Pen(color)) { pen.EndCap = LineCap.ArrowAnchor; pen.EndCap = LineCap.Custom; pen.CustomEndCap = new AdjustableArrowCap(4, 4, true); g.DrawLine(pen, _mouseDownPoint, point); } break; case DrawStyle.Text: using (Pen pen = new Pen(color)) { pen.DashStyle = DashStyle.DashDot; pen.DashCap = DashCap.Round; pen.DashPattern = new float[] { 9f, 3f, 3f, 3f }; g.DrawRectangle( pen, ImageBoundsToRect(Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, point.X, point.Y))); } break; case DrawStyle.Line: if (LinePointList.Count < 2) { return; } Point[] points = LinePointList.ToArray(); using (Pen pen = new Pen(color)) { g.DrawLines( pen, points); } break; } } private void DrawOperate(Graphics g) { foreach (OperateObject obj in OperateManager.OperateList) { switch (obj.OperateType) { case OperateType.DrawRectangle: using (Pen pen = new Pen(obj.Color)) { g.DrawRectangle( pen, (Rectangle)obj.Data); } break; case OperateType.DrawEllipse: using (Pen pen = new Pen(obj.Color)) { g.DrawEllipse( pen, (Rectangle)obj.Data); } break; case OperateType.DrawArrow: Point[] points = obj.Data as Point[]; using (Pen pen = new Pen(obj.Color)) { pen.EndCap = LineCap.Custom; pen.CustomEndCap = new AdjustableArrowCap(4, 4, true); g.DrawLine(pen, points[0], points[1]); } break; case OperateType.DrawText: DrawTextData textdata = obj.Data as DrawTextData; if (string.IsNullOrEmpty(textdata.Text)) { using (Pen pen = new Pen(obj.Color)) { pen.DashStyle = DashStyle.DashDot; pen.DashCap = DashCap.Round; pen.DashPattern = new float[] { 9f, 3f, 3f, 3f }; g.DrawRectangle( pen, textdata.TextRect); } } else { using (SolidBrush brush = new SolidBrush(obj.Color)) { g.DrawString( textdata.Text, textdata.Font, brush, textdata.TextRect); } } break; case OperateType.DrawLine: using (Pen pen = new Pen(obj.Color)) { g.DrawLines(pen, obj.Data as Point[]); } break; } } } private void DrawLastImage() { using (Bitmap allBmp = new Bitmap( Width, Height, PixelFormat.Format32bppArgb)) { using (Graphics allGraphics = Graphics.FromImage(allBmp)) { allGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic; allGraphics.SmoothingMode = SmoothingMode.AntiAlias; //使用原始图片获取截图（涂剑凯修改） allGraphics.DrawImage(ScreenImage, Point.Empty); //使用窗体背景图片截图（原版） //allGraphics.DrawImage(BackgroundImage,Point.Empty); DrawOperate(allGraphics); allGraphics.Flush(); Bitmap bmp = new Bitmap( SelectImageRect.Width, SelectImageRect.Height, PixelFormat.Format32bppArgb); Graphics g = Graphics.FromImage(bmp); g.DrawImage( allBmp, 0, 0, SelectImageRect, GraphicsUnit.Pixel); g.Flush(); g.Dispose(); _image = bmp; } } //将图片放到剪贴板（涂剑凯添加） Clipboard.SetDataObject(this.Image,true); } #endregion #region Events Methods private void ColorSelectorColorChanged(object sender, EventArgs e) { if (DrawStyle == DrawStyle.Text && textBox.Visible) { textBox.ForeColor = SelectedColor; } } private void DrawToolsControlButtonDrawStyleClick(object sender, EventArgs e) { switch (DrawStyle) { case DrawStyle.Rectangle: case DrawStyle.Ellipse: case DrawStyle.Arrow: case DrawStyle.Line: colorSelector.Reset(); ShowColorSelector(); if (SizeGrip != SizeGrip.None) { SizeGrip = SizeGrip.None; } break; case DrawStyle.Text: colorSelector.ChangeToFontStyle(); ShowColorSelector(); if (SizeGrip != SizeGrip.None) { SizeGrip = SizeGrip.None; } break; case DrawStyle.None: HideColorSelector(); break; } } private void DrawToolsControlButtonRedoClick(object sender, EventArgs e) { if (OperateManager.OperateCount > 0) { OperateManager.RedoOperate(); base.Invalidate(); } else { if (SelectedImage) { ResetSelectImage(); base.Invalidate(); } } } private void DrawToolsControlButtonSaveClick(object sender, EventArgs e) { if (SelectedImage) { //默认文件名 //saveFileDialog.FileName = "JD" DateTime.Now.ToString("yyyyMMddHHmmss") "_" new Random().Next(1000000, 9999999) "." saveFileDialog.DefaultExt; saveFileDialog.FileName = "JD" DateTime.Now.ToString("yyyyMMddHHmmss") "." saveFileDialog.DefaultExt; if (saveFileDialog.ShowDialog() == DialogResult.OK) { DrawLastImage(); string fileName = saveFileDialog.FileName; int index = fileName.LastIndexOf('.'); string extion = fileName.Substring( index 1, fileName.Length - index - 1); extion = extion.ToLower(); ImageFormat imageFormat = ImageFormat.Bmp; switch (extion) { case "jpg": case "jpeg": imageFormat = ImageFormat.Jpeg; break; case "png": imageFormat = ImageFormat.Png; break; case "gif": imageFormat = ImageFormat.Gif; break; } Image.Save(saveFileDialog.FileName, imageFormat); DialogResult = DialogResult.Cancel; this.Close(); } } else { MessageBox.Show("请先选择图像。", "截图", MessageBoxButtons.OK); } } private void DrawToolsControlButtonAcceptClick(object sender, EventArgs e) { if (SelectedImage) { DrawLastImage(); DialogResult = DialogResult.OK; } else { DialogResult = DialogResult.Cancel; } } private void DrawToolsControlButtonExitClick(object sender, EventArgs e) { DialogResult = DialogResult.Cancel; } private void MenuItemReselectClick(object sender, EventArgs e) { if (SelectedImage) { ResetSelectImage(); } } private void TextBoxExLostFocus(object sender, EventArgs e) { if (textBox.Visible) { string text = textBox.Text; Font font = textBox.Font; Color color = textBox.ForeColor; HideTextBox(); if (OperateManager.OperateCount > 0) { OperateObject obj = OperateManager.OperateList[OperateManager.OperateCount - 1]; if (obj.OperateType == OperateType.DrawText) { DrawTextData textData = obj.Data as DrawTextData; if (!textData.Completed) { if (string.IsNullOrEmpty(text)) { OperateManager.RedoOperate(); } else { obj.Color = color; textData.Font = font; textData.Text = text; textData.Completed = true; } } } } base.Invalidate(); } } #endregion #region Private Methods private void Init() { SetStyle( ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer, true); //双缓冲绘制，避免闪烁 //this.SetStyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true); drawToolsControl.Visible = false; colorSelector.Visible = false; textBox.Visible = false; this.TopMost = true; this.ShowInTaskbar = false; this.FormBorderStyle = FormBorderStyle.None; //Bounds = Screen.GetBounds(this); this.Bounds = System.Windows.Forms.Screen.PrimaryScreen.Bounds; //保留当前屏 ScreenImage = GetDestopImage(); //复制当前屏 Image BackScreen = new Bitmap(ScreenImage); Graphics g = Graphics.FromImage(BackScreen); //画遮罩 g.FillRectangle(mask, 0, 0, BackScreen.Width, BackScreen.Height); g.Dispose(); //将有遮罩的图像作为背景 this.BackgroundImage = BackScreen; //BackgroundImage = GetDestopImage(); try { _selectCursor = new Cursor(Properties.Resources.Arrow_M.Handle); } catch{} Cursor = SelectCursor; contextMenuStrip.Renderer = new ToolStripRendererEx(); textBox.LostFocus = new EventHandler(TextBoxExLostFocus); colorSelector.ColorChanged = new EventHandler( ColorSelectorColorChanged); drawToolsControl.ButtonExitClick = new EventHandler( DrawToolsControlButtonExitClick); drawToolsControl.ButtonAcceptClick = new EventHandler( DrawToolsControlButtonAcceptClick); drawToolsControl.ButtonSaveClick = new EventHandler( DrawToolsControlButtonSaveClick); drawToolsControl.ButtonRedoClick = new EventHandler( DrawToolsControlButtonRedoClick); drawToolsControl.ButtonDrawStyleClick = new EventHandler( DrawToolsControlButtonDrawStyleClick); menuItemExit.Click = new EventHandler( DrawToolsControlButtonExitClick); menuItemAccept.Click = new EventHandler( DrawToolsControlButtonAcceptClick); menuItemSave.Click = new EventHandler( DrawToolsControlButtonSaveClick); menuItemRedo.Click = new EventHandler( DrawToolsControlButtonRedoClick); menuItemReselect.Click = new EventHandler( MenuItemReselectClick); } /// <summary> /// 截取完整屏幕图片 /// </summary> /// <returns></returns> private Image GetDestopImage() { Rectangle rect = Screen.GetBounds(this); Bitmap bmp = new Bitmap( rect.Width, rect.Height, PixelFormat.Format32bppArgb); Graphics g = Graphics.FromImage(bmp); IntPtr gHdc = g.GetHdc(); IntPtr deskHandle = NativeMethods.GetDesktopWindow(); IntPtr dHdc = NativeMethods.GetDC(deskHandle); NativeMethods.BitBlt( gHdc, 0, 0, Width, Height, dHdc, 0, 0, NativeMethods.TernaryRasterOperations.SRCCOPY); NativeMethods.ReleaseDC(deskHandle, dHdc); g.ReleaseHdc(gHdc); return bmp; } private Rectangle GetSelectImageRect(Point endPoint) { _selectImageBounds = Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, endPoint.X, endPoint.Y); return ImageBoundsToRect(_selectImageBounds); } private void CalCulateSizeGripRect() { Rectangle rect = SelectImageRect; int x = rect.X; int y = rect.Y; int centerX = x rect.Width / 2; int centerY = y rect.Height / 2; Dictionary<SizeGrip,Rectangle> list = SizeGripRectList; list.Clear(); list.Add( SizeGrip.TopLeft, new Rectangle(x - 2, y - 2, 5, 5)); list.Add( SizeGrip.TopRight, new Rectangle(rect.Right - 2, y - 2, 5, 5)); list.Add( SizeGrip.BottomLeft, new Rectangle(x - 2, rect.Bottom - 2, 5, 5)); list.Add( SizeGrip.BottomRight, new Rectangle(rect.Right - 2, rect.Bottom - 2, 5, 5)); list.Add( SizeGrip.Top, new Rectangle(centerX - 2, y - 2, 5, 5)); list.Add( SizeGrip.Bottom, new Rectangle(centerX - 2, rect.Bottom - 2, 5, 5)); list.Add( SizeGrip.Left, new Rectangle(x - 2, centerY - 2, 5, 5)); list.Add( SizeGrip.Right, new Rectangle(rect.Right - 2, centerY - 2, 5, 5)); } private void SetSizeGrip(Point point) { SizeGrip = SizeGrip.None; foreach (SizeGrip sizeGrip in SizeGripRectList.Keys) { if (SizeGripRectList[sizeGrip].Contains(point)) { SizeGrip = sizeGrip; break; } } if (SizeGrip == SizeGrip.None) { if (SelectImageRect.Contains(point)) { SizeGrip = SizeGrip.All; } } switch (SizeGrip) { case SizeGrip.TopLeft: case SizeGrip.BottomRight: Cursor = Cursors.SizeNWSE; break; case SizeGrip.TopRight: case SizeGrip.BottomLeft: Cursor = Cursors.SizeNESW; break; case SizeGrip.Top: case SizeGrip.Bottom: Cursor = Cursors.SizeNS; break; case SizeGrip.Left: case SizeGrip.Right: Cursor = Cursors.SizeWE; break; case SizeGrip.All: Cursor = Cursors.SizeAll; break; default: Cursor = SelectCursor; break; } } private void ChangeSelctImageRect(Point point) { Rectangle rect = _selectImageBounds; int left = rect.Left; int top = rect.Top; int right = rect.Right; int bottom = rect.Bottom; bool sizeGripAll = false; switch (SizeGrip) { case SizeGrip.All: rect.Offset( point.X - _mouseDownPoint.X, point.Y - _mouseDownPoint.Y); sizeGripAll = true; break; case SizeGrip.TopLeft: left = point.X; top = point.Y; break; case SizeGrip.TopRight: right = point.X; top = point.Y; break; case SizeGrip.BottomLeft: left = point.X; bottom = point.Y; break; case SizeGrip.BottomRight: right = point.X; bottom = point.Y; break; case SizeGrip.Top: top = point.Y; break; case SizeGrip.Bottom: bottom = point.Y; break; case SizeGrip.Left: left = point.X; break; case SizeGrip.Right: right = point.X; break; } //_selectImageBounds = rect; if (!sizeGripAll) { rect.X = left; rect.Y = top; rect.Width = right - left; rect.Height = bottom - top; } _mouseDownPoint = point; _selectImageBounds = rect; SelectImageRect = ImageBoundsToRect(rect); ; } private Rectangle ImageBoundsToRect(Rectangle bounds) { Rectangle rect = bounds; int x = 0; int y = 0; x = Math.Min(rect.X, rect.Right); y = Math.Min(rect.Y, rect.Bottom); rect.X = x; rect.Y = y; rect.Width = Math.Max(1, Math.Abs(rect.Width)); rect.Height = Math.Max(1, Math.Abs(rect.Height)); return rect; } private void ResetSelectImage() { SelectedImage = false; _selectImageBounds = Rectangle.Empty; SelectImageRect = Rectangle.Empty; SizeGrip = SizeGrip.None; HideDrawToolsControl(); if (textBox.Visible) { HideTextBox(); } OperateManager.Clear(); base.Invalidate(); } private void ShowDrawToolsControl() { Rectangle rect = SelectImageRect; Rectangle screenBounds = Screen.GetBounds(this); int x = rect.Right - drawToolsControl.Width - 2; int y = 0; DrawToolsDockStyle dockStyle = DrawToolsDockStyle.None; if (rect.Bottom drawToolsControl.Height 2 <= screenBounds.Bottom) { y = rect.Bottom 2; dockStyle = DrawToolsDockStyle.Bottom; } else if (rect.Y - drawToolsControl.Height - 2 >= screenBounds.Top) { y = rect.Y - drawToolsControl.Height - 2; dockStyle = DrawToolsDockStyle.Top; } else { y = rect.Bottom - drawToolsControl.Height - 2; dockStyle = DrawToolsDockStyle.BottomUp; } drawToolsControl.DrawToolsDockStyle = dockStyle; drawToolsControl.Location = new Point(x, y); drawToolsControl.Visible = true; } private void HideDrawToolsControl() { drawToolsControl.Visible = false; drawToolsControl.ResetDrawStyle(); HideColorSelector(); } private void ShowColorSelector() { int x = 0; int y = 0; Rectangle rect = drawToolsControl.Bounds; Rectangle screenBounds = Screen.GetBounds(this); switch (drawToolsControl.DrawToolsDockStyle) { case DrawToolsDockStyle.Top: case DrawToolsDockStyle.BottomUp: x = rect.X; y = rect.Y - colorSelector.Height - 2; break; case DrawToolsDockStyle.Bottom: x = rect.X; y = rect.Bottom 2; break; } colorSelector.Location = new Point(x, y); colorSelector.Visible = true; } private void HideColorSelector() { if (colorSelector.Visible) { colorSelector.Visible = false; colorSelector.Reset(); } } /// <summary> /// 显示添加文字的输入框 /// </summary> private void ShowTextBox() { if (SelectImageRect.Contains(_mouseDownPoint)) { Rectangle bounds = ImageBoundsToRect( Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, _endPoint.X, _endPoint.Y)); bounds.Inflate(-1, -1); textBox.Bounds = bounds; textBox.Text = ""; textBox.ForeColor = SelectedColor; textBox.Font = new Font( textBox.Font.FontFamily, (float)FontSize); textBox.Visible = true; textBox.Focus(); } } /// <summary> /// 隐藏添加文字的输入框 /// </summary> private void HideTextBox() { textBox.Visible = false; textBox.Text = string.Empty; } private void AddOperate(Point point) { if (!SelectImageRect.Contains(_mouseDownPoint)) { return; } Color color = SelectedColor; switch (DrawStyle) { case DrawStyle.Rectangle: OperateManager.AddOperate( OperateType.DrawRectangle, color, ImageBoundsToRect(Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, point.X, point.Y))); break; case DrawStyle.Ellipse: OperateManager.AddOperate( OperateType.DrawEllipse, color, ImageBoundsToRect(Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, point.X, point.Y))); break; case DrawStyle.Arrow: Point[] points = new Point[] { _mouseDownPoint, point }; OperateManager.AddOperate( OperateType.DrawArrow, color, points); break; case DrawStyle.Text: ShowTextBox(); Rectangle textRect = ImageBoundsToRect(Rectangle.FromLTRB( _mouseDownPoint.X, _mouseDownPoint.Y, point.X, point.Y)); DrawTextData textData = new DrawTextData( string.Empty, base.Font, textRect); OperateManager.AddOperate( OperateType.DrawText, color, textData); break; case DrawStyle.Line: if (LinePointList.Count < 2) { return; } OperateManager.AddOperate( OperateType.DrawLine, color, LinePointList.ToArray()); LinePointList.Clear(); break; } } private void ClipCursor(bool reset) { Rectangle rect; if (reset) { rect = Screen.GetBounds(this); } else { rect = SelectImageRect; } NativeMethods.RECT nativeRect = new NativeMethods.RECT(rect); NativeMethods.ClipCursor(ref nativeRect); } #endregion /// <summary> /// 键盘事件响应 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void CaptureImageTool_KeyUp(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Escape) { //按下ESC，首先退出右键菜单，再退出截图 if (contextMenuStripVisible) { contextMenuStrip.Hide(); contextMenuStripVisible = false; } else { DialogResult = DialogResult.Cancel; this.Close(); } } } /// <summary> /// 右键菜单是否显示状态 /// </summary> private bool contextMenuStripVisible = false; }}