1.使用鼠標控制位置：在任意位置點擊左鍵拖動 2.使用鼠標控制大小：在控件右下角待變為‘調整光標’是可以調整大小 3.使用鍵盤控制位置：alt + 方向鍵 4.使用鍵盤控制大小：ctrl + 方向鍵 using System.ComponentModel; using System.Drawing; using System.Windows.Forms; namespace AppGenCode.Printer { public enum EnumAdjust { Nothing =0, Size = 1, Postion = 2 } public partial class AdjustTextBox : TextBox { public AdjustTextBox() { InitializeComponent(); InitCtrl(); } public AdjustTextBox(IContainer container) { container.Add(this); InitializeComponent(); InitCtrl(); } private bool m_isMoving = false; private Point m_offset = new Point(0,0); private Size m_intSize = new Size(0, 0); private EnumAdjust m_adjust = EnumAdjust.Nothing; private int m_x, m_y, m_w, m_h = 0; private Rectangle RecAdjustSize { get { return new Rectangle(this.Width-15,this.Height-15,15,15);} } private Rectangle RecAdjustPostion { get { return new Rectangle(0, 0, this.Width, this.Height); } } private void InitCtrl() { this.Text = "asdf1234"; this.Multiline = true; this.BorderStyle = BorderStyle.FixedSingle; this.ReadOnly = true; } #region 鼠標事件 protected override void OnMouseDown(MouseEventArgs e) { m_isMoving = true; m_offset = new Point(e.X, e.Y); m_intSize.Width = this.Width; m_intSize.Height = this.Height; if (RecAdjustSize.Contains(e.X, e.Y)) //調整大小 { this.Cursor = Cursors.SizeNWSE; m_adjust = EnumAdjust.Size; } else if (RecAdjustPostion.Contains(e.X, e.Y)) //調整位置 { this.Cursor = Cursors.SizeAll; m_adjust = EnumAdjust.Postion; } else { m_adjust = EnumAdjust.Nothing; } base.OnMouseDown(e); } protected override void OnMouseUp(MouseEventArgs mevent) { Cursor = Cursors.Default; m_isMoving = false; base.OnMouseUp(mevent); } protected override void OnMouseMove(MouseEventArgs e) { CursorCtrl(e.X, e.Y); m_x = this.Left; m_y = this.Top; m_w = this.Width; m_h = this.Height; if (m_isMoving) { switch (m_adjust) { case EnumAdjust.Size: m_w = m_intSize.Width + (e.X - m_offset.X); m_h = m_intSize.Height + (e.Y - m_offset.Y); break; case EnumAdjust.Postion: m_x = Location.X + (e.X - m_offset.X); m_y = Location.Y + (e.Y - m_offset.Y); break; } BackColor = Color.Red; this.SetBounds(m_x, m_y, m_w, m_h); } base.OnMouseMove(e); } #endregion #region 鍵盤事件 protected override void OnPreviewKeyDown(PreviewKeyDownEventArgs e) { base.OnPreviewKeyDown(e); if (e.Alt) //調整大小 { switch (e.KeyCode) { case Keys.Left: this.Width -= 5; break; case Keys.Right: this.Width += 5; break; case Keys.Down: this.Height += 5; break; case Keys.Up: this.Height -= 5; break; } return; } if (e.Control) { switch (e.KeyCode) //調整位置 { case Keys.Left: this.Left -= 5; break; case Keys.Right: this.Left += 5; break; case Keys.Up: this.Top -= 5; break; case Keys.Down: this.Top += 5; break; } } } #endregion private void CursorCtrl(int x,int y) { if (!m_isMoving && RecAdjustSize.Contains(x,y)) { this.Cursor = Cursors.SizeNWSE; return; } this.Cursor = Cursors.Default; } } }
