/* C#: Simple Runtime Control Sizing and Dragging Class
首先声明如下代码改自 CodeProject 同名文章(鸣谢原作者 Jim Korovessis: ~!@#$%^&*): http://www.codeproject.com/cs/miscctrl/CSPickBoxSample1.asp
我做了如下改造:
1.增加一个 ArrayList 存储 WiredControls 2.增加 UnWireAllWiredControls() 方法,用于切换到控件"非设计"状态 3.增加 WireControls() 方法,用于到控件"设计"状态 4.增加支持键盘移动或改大小
我会把我更改的代码高亮显示! */
//You Can Save below code to one File named Noname1.cs //execute "csc noname1.cs" Directly!
//PickBox using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data;
//namespace PickBoxTest //{ /// <summary> /// This class implements sizing and moving functions for /// runtime editing of graphic controls /// </summary> public class PickBox { ////////////////////////////////////////////////////////////////// // PRIVATE CONSTANTS AND VARIABLES //////////////////////////////////////////////////////////////////
private const int BOX_SIZE = 8; private Color BOX_COLOR = Color.White; // private ContainerControl m_container; private Control m_control; private Label[] lbl = new Label[8]; private int startl; private int startt; private int startw; private int starth; private int startx; private int starty; private bool dragging; private Cursor[] arrArrow = new Cursor[] { Cursors.SizeNWSE ,Cursors.SizeNS ,Cursors.SizeNESW ,Cursors.SizeWE ,Cursors.SizeNWSE ,Cursors.SizeNS ,Cursors.SizeNESW ,Cursors.SizeWE }; private Cursor oldCursor;
private const int MIN_SIZE = 20;
private Form ParentForm;
// // Constructor creates 8 sizing handles & wires mouse events // to each that implement sizing functions // public PickBox() { for (int i = 0; i < 8; i++) { lbl[i] = new Label(); lbl[i].TabIndex = i; lbl[i].FlatStyle = 0 ; lbl[i].BorderStyle = BorderStyle.FixedSingle; lbl[i].BackColor = BOX_COLOR; lbl[i].Cursor = arrArrow[i]; lbl[i].Text = ""; lbl[i].BringToFront(); lbl[i].MouseDown += new MouseEventHandler(this.lbl_MouseDown); lbl[i].MouseMove += new MouseEventHandler(this.lbl_MouseMove); lbl[i].MouseUp += new MouseEventHandler(this.lbl_MouseUp); } }
////////////////////////////////////////////////////////////////// // PUBLIC METHODS //////////////////////////////////////////////////////////////////
// // Wires a Click event handler to the passed Control // that attaches a pick box to the control when it is clicked //
//add by [email protected] // Store Controls for Design (resize or move) private ArrayList WiredControls = new ArrayList();
public void WireControl(Control ctl) { //add by [email protected] //Store Wired Controls WiredControls.Add(ctl);
if (ParentForm != ctl.FindForm()) { ParentForm = ctl.FindForm(); //ParentForm.KeyPreview = true; }
ctl.Click += new EventHandler(this.SelectControl);
//add by [email protected] //support resizing or moving control by Keyboard ctl.KeyDown += new KeyEventHandler(ctl_KeyDown); }
//add by [email protected] //for Wire Controls that in WiredControls ArrayList public void WireControls() { if (WiredControls.Count > 0) { System.Collections.IEnumerator ie = WiredControls.GetEnumerator(); while ( ie.MoveNext() ) { this.WireControl((Control) ie.Current); } } } //add by [email protected] //for UnWire Controls that in WiredControls ArrayList public void UnWireAllWiredControls() {
System.Collections.IEnumerator ie = WiredControls.GetEnumerator(); Control c; while ( ie.MoveNext() ) { c = (Control) ie.Current; c.Click -= new EventHandler(this.SelectControl); c.KeyDown -= new KeyEventHandler(ctl_KeyDown);
if (m_control is Control) { m_control.Cursor = oldCursor; //Remove event any pre-existing event handlers appended by this class m_control.MouseDown -= new MouseEventHandler(this.ctl_MouseDown); m_control.MouseMove -= new MouseEventHandler(this.ctl_MouseMove); m_control.MouseUp -= new MouseEventHandler(this.ctl_MouseUp);
m_control.KeyDown -= new KeyEventHandler(ctl_KeyDown);
m_control = null; } } this.HideHandles(); }
///////////////////////////////////////////////////////////////// // PRIVATE METHODS /////////////////////////////////////////////////////////////////
// // Attaches a pick box to the sender Control // private void SelectControl(object sender, EventArgs e) {
if (m_control is Control) { m_control.Cursor = oldCursor;
//Remove event any pre-existing event handlers appended by this class m_control.MouseDown -= new MouseEventHandler(this.ctl_MouseDown); m_control.MouseMove -= new MouseEventHandler(this.ctl_MouseMove); m_control.MouseUp -= new MouseEventHandler(this.ctl_MouseUp);
m_control = null; }
m_control = (Control) sender;
//Add event handlers for moving the selected control around m_control.MouseDown += new MouseEventHandler(this.ctl_MouseDown); m_control.MouseMove += new MouseEventHandler(this.ctl_MouseMove); m_control.MouseUp += new MouseEventHandler(this.ctl_MouseUp);
//Add sizing handles to Control's container (Form or PictureBox) for (int i = 0; i < 8; i++) { m_control.Parent.Controls.Add(lbl[i]); lbl[i].BringToFront(); }
//Position sizing handles around Control MoveHandles();
//Display sizing handles ShowHandles();
oldCursor = m_control.Cursor; m_control.Cursor = Cursors.SizeAll; }
public void Remove() { HideHandles(); m_control.Cursor = oldCursor; }
private void ShowHandles() { if (m_control !=null) { for (int i = 0; i < 8; i++) { lbl[i].Visible = true; } } }
private void HideHandles() { for (int i = 0; i < 8; i++) { lbl[i].Visible = false; } }
private void MoveHandles() { int sX = m_control.Left - BOX_SIZE; int sY = m_control.Top - BOX_SIZE; int sW = m_control.Width + BOX_SIZE; int sH = m_control.Height + BOX_SIZE; int hB = BOX_SIZE / 2;
int[] arrPosX = new int[] { sX+hB, sX + sW / 2 ,sX + sW-hB ,sX + sW-hB ,sX + sW-hB ,sX + sW / 2 ,sX+hB, sX+hB }; int[] arrPosY = new int[] { sY+hB ,sY+hB ,sY+hB ,sY + sH / 2 , sY + sH-hB ,sY + sH-hB ,sY + sH-hB ,sY + sH / 2 }; for (int i = 0; i < 8; i++) lbl[i].SetBounds(arrPosX[i], arrPosY[i], BOX_SIZE, BOX_SIZE); }
///////////////////////////////////////////////////////////////// // MOUSE EVENTS THAT IMPLEMENT SIZING OF THE PICKED CONTROL /////////////////////////////////////////////////////////////////
// // Store control position and size when mouse button pushed over // any sizing handle // private void lbl_MouseDown(object sender, MouseEventArgs e) { dragging = true; startl = m_control.Left; startt = m_control.Top; startw = m_control.Width; starth = m_control.Height; HideHandles(); }
// // Size the picked control in accordance with sizing handle being dragged // 0 1 2 // 7 3 // 6 5 4 // private void lbl_MouseMove(object sender, MouseEventArgs e) { int l = m_control.Left; int w = m_control.Width; int t = m_control.Top; int h = m_control.Height; if (dragging) { switch (((Label)sender).TabIndex) { case 0 : // Dragging top-left sizing box l = startl + e.X < startl + startw - MIN_SIZE ? startl + e.X : startl + startw - MIN_SIZE; t = startt + e.Y < startt + starth - MIN_SIZE ? startt + e.Y : startt + starth - MIN_SIZE; w = startl + startw - m_control.Left; h = startt + starth - m_control.Top; break; case 1 : // Dragging top-center sizing box t = startt + e.Y < startt + starth - MIN_SIZE ? startt + e.Y : startt + starth - MIN_SIZE; h = startt + starth - m_control.Top; break; case 2 : // Dragging top-right sizing box w = startw + e.X > MIN_SIZE ? startw + e.X : MIN_SIZE; t = startt + e.Y < startt + starth - MIN_SIZE ? startt + e.Y : startt + starth - MIN_SIZE; h = startt + starth - m_control.Top; break; case 3 : // Dragging right-middle sizing box w = startw + e.X > MIN_SIZE ? startw + e.X : MIN_SIZE; break; case 4 : // Dragging right-bottom sizing box w = startw + e.X > MIN_SIZE ? startw + e.X : MIN_SIZE; h = starth + e.Y > MIN_SIZE ? starth + e.Y : MIN_SIZE; break; case 5 : // Dragging center-bottom sizing box h = starth + e.Y > MIN_SIZE ? starth + e.Y : MIN_SIZE; break; case 6 : // Dragging left-bottom sizing box l = startl + e.X < startl + startw - MIN_SIZE ? startl + e.X : startl + startw - MIN_SIZE; w = startl + startw - m_control.Left; h = starth + e.Y > MIN_SIZE ? starth + e.Y : MIN_SIZE; break; case 7 : // Dragging left-middle sizing box l = startl + e.X < startl + startw - MIN_SIZE ? startl + e.X : startl + startw - MIN_SIZE; w = startl + startw - m_control.Left; break; } l = (l < 0)? 0 : l; t = (t < 0)? 0 : t; m_control.SetBounds(l,t,w,h); } }
// // Display sizing handles around picked control once sizing has completed // private void lbl_MouseUp(object sender, MouseEventArgs e) { dragging = false; MoveHandles(); ShowHandles(); }
///////////////////////////////////////////////////////////////// // MOUSE EVENTS THAT MOVE THE PICKED CONTROL AROUND THE FORM /////////////////////////////////////////////////////////////////
// // Get mouse pointer starting position on mouse down and hide sizing handles // private void ctl_MouseDown(object sender, MouseEventArgs e) { dragging = true; startx = e.X; starty = e.Y; HideHandles(); }
// // Reposition the dragged control // private void ctl_MouseMove(object sender, MouseEventArgs e) { if (dragging) { int l = m_control.Left + e.X - startx; int t = m_control.Top + e.Y - starty; int w = m_control.Width; int h = m_control.Height;
l = (l < 0)? 0 : ((l + w > m_control.Parent.ClientRectangle.Width)? m_control.Parent.ClientRectangle.Width - w : l); t = (t < 0)? 0 : ((t + h > m_control.Parent.ClientRectangle.Height)? m_control.Parent.ClientRectangle.Height - h : t); m_control.Left = l; m_control.Top = t; } }
// // Display sizing handles around picked control once dragging has completed // private void ctl_MouseUp(object sender, MouseEventArgs e) { dragging = false; MoveHandles(); ShowHandles(); }
private void ctl_KeyDown(object sender, KeyEventArgs e) { if (e.Modifiers == Keys.Control) { switch (e.KeyCode) { case Keys.Right : m_control.Left += 10; break; case Keys.Left : m_control.Left -= 10; break; case Keys.Up : m_control.Top -= 10; break; case Keys.Down : m_control.Top += 10; break; } MoveHandles(); } else if (e.Modifiers == Keys.Shift) { switch (e.KeyCode) { case Keys.Right : m_control.Width += 10; break; case Keys.Left : m_control.Width -= 10; break; case Keys.Up : m_control.Height -= 10; break; case Keys.Down : m_control.Height += 10; break; } MoveHandles(); } //((Control)sender).Select(); } } //}
//==================================================
//WinForm Test //Form1 //using System; //using System.Drawing; //using System.Collections; //using System.ComponentModel; //using System.Windows.Forms; //using System.Data;
//namespace WindowsApplication1 //{ /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.DataGrid dataGrid1; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; private System.Windows.Forms.DataGrid dataGrid2; private System.Windows.Forms.Button button2;
//add by [email protected] private PickBox pb = new PickBox(); public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent();
// // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // }
/// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (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 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.textBox1 = new System.Windows.Forms.TextBox(); this.dataGrid1 = new System.Windows.Forms.DataGrid(); this.dataGrid2 = new System.Windows.Forms.DataGrid(); this.button2 = new System.Windows.Forms.Button(); ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.dataGrid2)).BeginInit(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(24, 16); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(104, 40); this.button1.TabIndex = 0; this.button1.Text = "切换"; this.button1.Click += new System.EventHandler(this.button1_Click); // // textBox1 // this.textBox1.Location = new System.Drawing.Point(144, 32); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(128, 21); this.textBox1.TabIndex = 1; this.textBox1.Text = "textBox1"; // // dataGrid1 // this.dataGrid1.DataMember = ""; this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dataGrid1.Location = new System.Drawing.Point(32, 80); this.dataGrid1.Name = "dataGrid1"; this.dataGrid1.Size = new System.Drawing.Size(160, 72); this.dataGrid1.TabIndex = 2; // // dataGrid2 // this.dataGrid2.DataMember = ""; this.dataGrid2.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dataGrid2.Location = new System.Drawing.Point(64, 208); this.dataGrid2.Name = "dataGrid2"; this.dataGrid2.Size = new System.Drawing.Size(168, 64); this.dataGrid2.TabIndex = 3; // // button2 // this.button2.Location = new System.Drawing.Point(280, 144); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(152, 56); this.button2.TabIndex = 4; this.button2.Text = "button2"; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(608, 381); this.Controls.Add(this.button2); this.Controls.Add(this.dataGrid2); this.Controls.Add(this.dataGrid1); this.Controls.Add(this.textBox1); this.Controls.Add(this.button1); this.Name = "Form1"; this.Text = "Form1"; this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown); this.Load += new System.EventHandler(this.Form1_Load); ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.dataGrid2)).EndInit(); this.ResumeLayout(false);
} #endregion
/// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); }
private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) {
}
bool b = false; private void button1_Click(object sender, System.EventArgs e) { if (!b) { this.Text = "Design Time";
pb.WireControl(dataGrid1); pb.WireControl(textBox1); pb.WireControl(button2); pb.WireControl(dataGrid2);
} else { this.Text = "Run Time"; pb.UnWireAllWiredControls(); } b = !b; }
private void Form1_Load(object sender, System.EventArgs e) {
} } //}

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