cyf
443 lines
14 KiB
C#
443 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Linq;
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using System.Text;
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using System.Windows.Forms;
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namespace Lskj.PubPdfSign.Controls
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{
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public partial class ResizeControl : UserControl
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{
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public ResizeControl(System.Windows.Forms.Control control)
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{
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//InitializeComponent();
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this.control = control;
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#region 绑定事件
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//鼠标按下时
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MouseDown += (sender, e) =>
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{
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//记录鼠标位置
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lastPoint = Cursor.Position;
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//改变鼠标状态
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SetCursor(e.X, e.Y);
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};
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//鼠标移动时，即在调整控件大小
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MouseMove += (sender, e) =>
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{
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//鼠标左键
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if (e.Button == MouseButtons.Left)
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{
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//移动时刷新实线
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DrawSolids();
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//调整控件大小
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ReCtrlSize();
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}
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//不是鼠标左键，则表示只是在控件上移动
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else
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{
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//改变鼠标状态
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SetCursor(e.X, e.Y);
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}
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};
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//鼠标键释放时
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MouseUp += (sender, e) =>
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{
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control.Refresh();
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//显示虚线
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SetControlRegion();
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System.Windows.Forms.Control pictureBox = (System.Windows.Forms.Control)sender;
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if (pictureBox.Tag != null && pictureBox.Tag is SignBox)
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{
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(pictureBox.Tag as SignBox).UpdateLocation();
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}
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};
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////鼠标离开控件隐藏边框
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//MouseLeave += (sender, e) =>
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//{
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// this.Visible = false;
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//};
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//大小改变时
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SizeChanged += (sender, e) =>
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{
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isSizeChanged = true;
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};
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#endregion
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}
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/// <summary>
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/// 是否已经改变大小，默认大小（150,150）不运行OnPaint方法，避免出现异常绘制
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/// </summary>
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bool isSizeChanged = false;
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/// <summary>
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/// 设置控件支持透明
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/// </summary>
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protected override CreateParams CreateParams
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{
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get
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{
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CreateParams cp = base.CreateParams;
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cp.ExStyle |= 0x20;
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return cp;
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}
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}
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/// <summary>
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/// 绘制虚线：4条虚线和8个小矩形
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/// </summary>
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protected override void OnPaint(PaintEventArgs e)
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{
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//默认大小，去除绘制，避免出现异常绘制
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if (isSizeChanged == false) return;
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DrawDottedLines(e.Graphics);
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}
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/// <summary>
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/// 当前控件
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/// </summary>
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System.Windows.Forms.Control control;
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/// <summary>
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/// 上一个鼠标坐标
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/// </summary>
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Point lastPoint = new Point();
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/// <summary>
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/// 包括边框的局域
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/// </summary>
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Rectangle controlRect;
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/// <summary>
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/// 4条底边的集合
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/// </summary>
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Rectangle[] borderRects = new Rectangle[4];
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/// <summary>
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/// 组成4条虚线的点
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/// </summary>
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Point[] linePoints = new Point[5];
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/// <summary>
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/// 8个小矩形大小
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/// </summary>
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const int size = 6;
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/// <summary>
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/// 8个小矩形的大小
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/// </summary>
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Size smallRectSize = new Size(size, size);
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/// <summary>
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/// 8个小矩形
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/// </summary>
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Rectangle[] smallRects = new Rectangle[8];
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#region 设置控件区域，绘制虚线，绘制实线
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/// <summary>
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/// 设置控件区域：4条底边，点击控件后显示
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/// </summary>
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public void SetControlRegion()
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{
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//显示边框并置顶
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Visible = true;
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BringToFront();
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#region 设置控件区域
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int x = control.Bounds.X - smallRectSize.Width;
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int y = control.Bounds.Y - smallRectSize.Height;
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int width = control.Bounds.Width + (smallRectSize.Width * 2);
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int height = control.Bounds.Height + (smallRectSize.Height * 2);
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Bounds = new Rectangle(x, y, width, height);
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//包括边框的局域
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controlRect = new Rectangle(new Point(0, 0), Bounds.Size);
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#endregion
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#region 4条底边
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GraphicsPath path = new GraphicsPath();
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//上底边
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borderRects[0] = new Rectangle(0, 0, Width + size * 2, smallRectSize.Height + 1);
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//左底边
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borderRects[1] = new Rectangle(0, size + 1, smallRectSize.Width + 1, Height - size * 2 - 2);
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//下底边
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borderRects[2] = new Rectangle(0, Height - size - 1, Width + size * 2, smallRectSize.Height + 1);
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//右底边
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borderRects[3] = new Rectangle(Width - size - 1, size + 1, smallRectSize.Width + 1, Height - size * 2 - 2);
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path.AddRectangle(borderRects[0]);
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path.AddRectangle(borderRects[1]);
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path.AddRectangle(borderRects[2]);
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path.AddRectangle(borderRects[3]);
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Region = new Region(path);
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#endregion
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}
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/// <summary>
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/// 绘制虚线：4条虚线和8个小矩形
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/// </summary>
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public void DrawDottedLines(Graphics g)
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{
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#region 4条虚线
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//左上
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linePoints[0] = new Point(3, 3);
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//右上
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linePoints[1] = new Point(Width - 3 - 1, 3);
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//右下
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linePoints[2] = new Point(Width - 3 - 1, Height - 3 - 1);
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//左下
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linePoints[3] = new Point(3, Height - 3 - 1);
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//左上
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linePoints[4] = new Point(3, 3);
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Pen pen = new Pen(Color.Black, 1) { DashStyle = DashStyle.Dot };
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g.DrawLines(pen, linePoints);
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#endregion
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#region 8个小矩形
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//左上
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smallRects[0] = new Rectangle(new Point(0, 0), smallRectSize);
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//右上
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smallRects[1] = new Rectangle(new Point(Width - size - 1, 0), smallRectSize);
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//左下
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smallRects[2] = new Rectangle(new Point(0, Height - size - 1), smallRectSize);
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//右下
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smallRects[3] = new Rectangle(new Point(Width - size - 1, Height - size - 1), smallRectSize);
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//上中
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smallRects[4] = new Rectangle(new Point(Width / 2 - 1, 0), smallRectSize);
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//下中
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smallRects[5] = new Rectangle(new Point(Width / 2 - 1, Height - size - 1), smallRectSize);
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//左中
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smallRects[6] = new Rectangle(new Point(0, Height / 2 - size / 2), smallRectSize);
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//右中
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smallRects[7] = new Rectangle(new Point(Width - size - 1, Height / 2 - size / 2), smallRectSize);
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//填充矩形内部为白色
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g.FillRectangles(Brushes.White, smallRects);
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//绘制矩形
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g.DrawRectangles(Pens.Black, smallRects);
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#endregion
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}
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/// <summary>
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/// 绘制实线：4条实线，移动控件和调整控件大小时显示
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/// </summary>
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public void DrawSolids()
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{
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//隐藏边框
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Visible = false;
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Graphics g = control.CreateGraphics();
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int width = control.Width;
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int height = control.Height;
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Point[] points = new Point[5] { new Point(0,0),new Point(width - 1,0),
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new Point(width - 1,height-1),new Point(0,height-1),new Point(0,0)};
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g.DrawLines(new Pen(Color.Gray, 3), points);
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}
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#endregion
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#region 调整控件大小
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/// <summary>
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/// 鼠标在控件中的位置
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/// </summary>
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enum MousePos
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{
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None,
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Top,
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Right,
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Bottom,
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Left,
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LeftTop,
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LeftBottom,
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RightTop,
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RightBottom
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}
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/// <summary>
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/// 鼠标在控件中的位置
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/// </summary>
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MousePos mousePos;
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/// <summary>
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/// 改变鼠标状态，鼠标在控件上，下，左，右，左上，右上，左下，右下，向上不同的光标
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/// </summary>
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private void SetCursor(int x, int y)
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{
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Point point = new Point(x, y);
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if (!controlRect.Contains(point))//不在边框局域内直接退出
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{
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Cursor.Current = Cursors.Arrow;
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return;
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}
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else if (smallRects[0].Contains(point))//左上
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{
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Cursor.Current = Cursors.SizeNWSE;
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mousePos = MousePos.LeftTop;
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}
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else if (smallRects[1].Contains(point))//右上
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{
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Cursor.Current = Cursors.SizeNESW;
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mousePos = MousePos.RightTop;
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}
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else if (smallRects[2].Contains(point))//左下
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{
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Cursor.Current = Cursors.SizeNESW;
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mousePos = MousePos.LeftBottom;
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}
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else if (smallRects[3].Contains(point))//右下
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{
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Cursor.Current = Cursors.SizeNWSE;
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mousePos = MousePos.RightBottom;
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}
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else if (borderRects[0].Contains(point))//上
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{
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Cursor.Current = Cursors.SizeNS;
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mousePos = MousePos.Top;
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}
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else if (borderRects[1].Contains(point))//左
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{
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Cursor.Current = Cursors.SizeWE;
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mousePos = MousePos.Left;
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}
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else if (borderRects[2].Contains(point))//下
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{
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Cursor.Current = Cursors.SizeNS;
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mousePos = MousePos.Bottom;
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}
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else if (borderRects[3].Contains(point))//右
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{
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Cursor.Current = Cursors.SizeWE;
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mousePos = MousePos.Right;
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}
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else
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{
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Cursor.Current = Cursors.Arrow;
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}
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}
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/// <summary>
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/// 控件的最小高度
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/// </summary>
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const int MinHeight = 10;
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/// <summary>
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/// 控件的最小宽度
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/// </summary>
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const int MinWeight = 10;
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/// <summary>
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/// 调整控件大小：鼠标在控件中的不同位置，调整控件大小
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/// </summary>
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private void ReCtrlSize()
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{
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//获取当前鼠标位置
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Point currentPoint = Cursor.Position;
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int x = currentPoint.X - lastPoint.X;
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int y = currentPoint.Y - lastPoint.Y;
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switch (mousePos)
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{
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case MousePos.None:
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break;
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case MousePos.Top://上，调整
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if (control.Height - y > MinHeight)
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{
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control.Top += y;
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control.Height -= y;
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}
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break;
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case MousePos.Right:
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if (control.Width + x > MinWeight)
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{
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control.Width += x;
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}
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break;
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case MousePos.Bottom:
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if (control.Height + y > MinHeight)
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{
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control.Height += y;
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}
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break;
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case MousePos.Left:
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if (control.Width - x > MinWeight)
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{
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control.Left += x;
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control.Width -= x;
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}
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break;
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case MousePos.LeftTop://左上
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if (control.Width - x > MinWeight)
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{
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control.Left += x;
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control.Width -= x;
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}
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if (control.Height - y > MinHeight)
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{
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control.Top += y;
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control.Height -= y;
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}
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break;
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case MousePos.LeftBottom:
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if (control.Width - x > MinWeight)
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{
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control.Left += x;
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control.Width -= x;
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}
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if (control.Height + y > MinHeight)
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{
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control.Height += y;
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}
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break;
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case MousePos.RightTop:
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if (control.Width + x > MinWeight)
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{
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control.Width += x;
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}
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if (control.Height - y > MinHeight)
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{
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control.Top += y;
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control.Height -= y;
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}
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break;
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case MousePos.RightBottom:
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if (control.Width + x > MinWeight)
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{
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control.Width += x;
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}
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if (control.Height + y > MinHeight)
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{
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control.Height += y;
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}
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break;
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default:
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break;
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}
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lastPoint = Cursor.Position;
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}
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#endregion
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}
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}
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