using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
class ImageDrop : Form {
bool bIsTarget;
Image image;
public static void Main() {
Application.Run(new ImageDrop());
}
public ImageDrop() {
AllowDrop = true;
}
protected override void OnDragOver(DragEventArgs dea) {
if (dea.Data.GetDataPresent(DataFormats.FileDrop) || dea.Data.GetDataPresent(typeof(Metafile)) || dea.Data.GetDataPresent(typeof(Bitmap))) {
if ((dea.AllowedEffect & DragDropEffects.Move) != 0)
dea.Effect = DragDropEffects.Move;
if (((dea.AllowedEffect & DragDropEffects.Copy) != 0) && ((dea.KeyState & 0x08) != 0)) // Ctrl key
dea.Effect = DragDropEffects.Copy;
}
}
protected override void OnDragDrop(DragEventArgs dea) {
if (dea.Data.GetDataPresent(DataFormats.FileDrop)) {
string[] astr = (string[])dea.Data.GetData(DataFormats.FileDrop);
image = Image.FromFile(astr[0]);
Invalidate();
} else {
if (dea.Data.GetDataPresent(typeof(Metafile)))
image = (Image)dea.Data.GetData(typeof(Metafile));
else if (dea.Data.GetDataPresent(typeof(Bitmap)))
image = (Image)dea.Data.GetData(typeof(Bitmap));
bIsTarget = true;
Invalidate();
}
}
protected override void OnMouseDown(MouseEventArgs mea) {
if (image != null) {
bIsTarget = false;
DragDropEffects dde = DoDragDrop(image,DragDropEffects.Copy | DragDropEffects.Move);
if (dde == DragDropEffects.Move && !bIsTarget)
image = null;
}
}
}
GUI Windows Form
Control Docking
/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa
Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Docking
{
/// <summary>
/// Summary description for FormDocking.
/// </summary>
public class FormDocking : System.Windows.Forms.Form
{
private System.Windows.Forms.StatusBar statusBar1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public FormDocking()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.statusBar1 = new System.Windows.Forms.StatusBar();
this.textBox1 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// statusBar1
//
this.statusBar1.Location = new System.Drawing.Point(0, 253);
this.statusBar1.Name = "statusBar1";
this.statusBar1.Size = new System.Drawing.Size(292, 20);
this.statusBar1.TabIndex = 9;
this.statusBar1.Text = "statusBar1";
//
// textBox1
//
this.textBox1.Dock = System.Windows.Forms.DockStyle.Fill;
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(292, 273);
this.textBox1.TabIndex = 2;
this.textBox1.Text = "Top Bottom Left Right";
//
// label1
//
this.label1.Dock = System.Windows.Forms.DockStyle.Top;
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(292, 16);
this.label1.TabIndex = 10;
this.label1.Text = "Docking Sample";
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// FormDocking
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1,
this.statusBar1,
this.textBox1});
this.Name = "FormDocking";
this.Text = "FormDocking";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new FormDocking());
}
}
}
Docking Demo
/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Docking
{
/// <summary>
/// Summary description for Docking.
/// </summary>
public class Docking : System.Windows.Forms.Form
{
internal System.Windows.Forms.GroupBox GroupBox1;
internal System.Windows.Forms.Button cmdUpdate;
internal System.Windows.Forms.NumericUpDown udDockPaddingForm;
internal System.Windows.Forms.NumericUpDown udDockPaddingPanel;
internal System.Windows.Forms.ComboBox lstDockPanel;
internal System.Windows.Forms.Label Label3;
internal System.Windows.Forms.Label Label4;
internal System.Windows.Forms.ComboBox lstDockTextBox;
internal System.Windows.Forms.Label Label2;
internal System.Windows.Forms.Label Label1;
internal System.Windows.Forms.Panel pnlDock;
internal System.Windows.Forms.TextBox txtDock;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Docking()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.GroupBox1 = new System.Windows.Forms.GroupBox();
this.cmdUpdate = new System.Windows.Forms.Button();
this.udDockPaddingForm = new System.Windows.Forms.NumericUpDown();
this.udDockPaddingPanel = new System.Windows.Forms.NumericUpDown();
this.lstDockPanel = new System.Windows.Forms.ComboBox();
this.Label3 = new System.Windows.Forms.Label();
this.Label4 = new System.Windows.Forms.Label();
this.lstDockTextBox = new System.Windows.Forms.ComboBox();
this.Label2 = new System.Windows.Forms.Label();
this.Label1 = new System.Windows.Forms.Label();
this.pnlDock = new System.Windows.Forms.Panel();
this.txtDock = new System.Windows.Forms.TextBox();
this.GroupBox1.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.udDockPaddingForm)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.udDockPaddingPanel)).BeginInit();
this.pnlDock.SuspendLayout();
this.SuspendLayout();
//
// GroupBox1
//
this.GroupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
this.cmdUpdate,
this.udDockPaddingForm,
this.udDockPaddingPanel,
this.lstDockPanel,
this.Label3,
this.Label4,
this.lstDockTextBox,
this.Label2,
this.Label1});
this.GroupBox1.Location = new System.Drawing.Point(192, 20);
this.GroupBox1.Name = "GroupBox1";
this.GroupBox1.Size = new System.Drawing.Size(284, 224);
this.GroupBox1.TabIndex = 12;
this.GroupBox1.TabStop = false;
this.GroupBox1.Text = "Configure";
//
// cmdUpdate
//
this.cmdUpdate.Location = new System.Drawing.Point(160, 180);
this.cmdUpdate.Name = "cmdUpdate";
this.cmdUpdate.Size = new System.Drawing.Size(84, 24);
this.cmdUpdate.TabIndex = 10;
this.cmdUpdate.Text = "Update";
this.cmdUpdate.Click += new System.EventHandler(this.cmdUpdate_Click);
//
// udDockPaddingForm
//
this.udDockPaddingForm.Increment = new System.Decimal(new int[] {
5,
0,
0,
0});
this.udDockPaddingForm.Location = new System.Drawing.Point(160, 32);
this.udDockPaddingForm.Name = "udDockPaddingForm";
this.udDockPaddingForm.Size = new System.Drawing.Size(52, 21);
this.udDockPaddingForm.TabIndex = 4;
//
// udDockPaddingPanel
//
this.udDockPaddingPanel.Increment = new System.Decimal(new int[] {
5,
0,
0,
0});
this.udDockPaddingPanel.Location = new System.Drawing.Point(160, 56);
this.udDockPaddingPanel.Name = "udDockPaddingPanel";
this.udDockPaddingPanel.Size = new System.Drawing.Size(52, 21);
this.udDockPaddingPanel.TabIndex = 5;
this.udDockPaddingPanel.Value = new System.Decimal(new int[] {
20,
0,
0,
0});
//
// lstDockPanel
//
this.lstDockPanel.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.lstDockPanel.Location = new System.Drawing.Point(156, 100);
this.lstDockPanel.Name = "lstDockPanel";
this.lstDockPanel.Size = new System.Drawing.Size(92, 21);
this.lstDockPanel.TabIndex = 8;
//
// Label3
//
this.Label3.Location = new System.Drawing.Point(16, 104);
this.Label3.Name = "Label3";
this.Label3.Size = new System.Drawing.Size(136, 20);
this.Label3.TabIndex = 6;
this.Label3.Text = "Dock Panel To:";
//
// Label4
//
this.Label4.Location = new System.Drawing.Point(16, 128);
this.Label4.Name = "Label4";
this.Label4.Size = new System.Drawing.Size(136, 20);
this.Label4.TabIndex = 7;
this.Label4.Text = "Dock TextBox To:";
//
// lstDockTextBox
//
this.lstDockTextBox.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.lstDockTextBox.Location = new System.Drawing.Point(156, 124);
this.lstDockTextBox.Name = "lstDockTextBox";
this.lstDockTextBox.Size = new System.Drawing.Size(92, 21);
this.lstDockTextBox.TabIndex = 9;
//
// Label2
//
this.Label2.Location = new System.Drawing.Point(16, 60);
this.Label2.Name = "Label2";
this.Label2.Size = new System.Drawing.Size(136, 20);
this.Label2.TabIndex = 3;
this.Label2.Text = "Set Panel's DockPadding:";
//
// Label1
//
this.Label1.Location = new System.Drawing.Point(16, 36);
this.Label1.Name = "Label1";
this.Label1.Size = new System.Drawing.Size(136, 20);
this.Label1.TabIndex = 2;
this.Label1.Text = "Set Form's DockPadding:";
//
// pnlDock
//
this.pnlDock.Controls.AddRange(new System.Windows.Forms.Control[] {
this.txtDock});
this.pnlDock.Dock = System.Windows.Forms.DockStyle.Left;
this.pnlDock.DockPadding.All = 20;
this.pnlDock.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.pnlDock.Name = "pnlDock";
this.pnlDock.Size = new System.Drawing.Size(224, 314);
this.pnlDock.TabIndex = 11;
//
// txtDock
//
this.txtDock.Dock = System.Windows.Forms.DockStyle.Left;
this.txtDock.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.txtDock.Location = new System.Drawing.Point(20, 20);
this.txtDock.Multiline = true;
this.txtDock.Name = "txtDock";
this.txtDock.Size = new System.Drawing.Size(108, 274);
this.txtDock.TabIndex = 0;
this.txtDock.Text = "I'm docked to the edge of this Panel.
The Panel is docked to the edge of the f" +
"orm.
The Panel's DockPadding gives the necessary room to breathe.";
//
// Docking
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
this.ClientSize = new System.Drawing.Size(496, 314);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.GroupBox1,
this.pnlDock});
this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.Name = "Docking";
this.Text = "Docking At Work";
this.Load += new System.EventHandler(this.Docking_Load);
this.GroupBox1.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.udDockPaddingForm)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.udDockPaddingPanel)).EndInit();
this.pnlDock.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Docking());
}
private void Docking_Load(object sender, System.EventArgs e)
{
lstDockPanel.Items.AddRange(Enum.GetNames(Dock.GetType()));
lstDockTextBox.Items.AddRange(Enum.GetNames(Dock.GetType()));
}
private void cmdUpdate_Click(object sender, System.EventArgs e)
{
this.DockPadding.All = (int)udDockPaddingForm.Value;
pnlDock.DockPadding.All = (int)udDockPaddingPanel.Value;
// Now we use some rather unusual code to translate the string
// in the listbox into an enumeration object that can be used
// to set the Dock property.
// This looks quite strange, but is actually just one more
// part of the shared class library.
// First we get the converter that can do the job.
TypeConverter converter;
converter = TypeDescriptor.GetConverter(Dock.GetType());
// Then we use it to convert the string.
pnlDock.Dock = (DockStyle)converter.ConvertFromString(lstDockPanel.Text);
txtDock.Dock = (DockStyle)converter.ConvertFromString(lstDockTextBox.Text);
}
}
}
Dock Style: Top
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class AnchorForm : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
public AnchorForm()
{
InitializeComponent();
CenterToScreen();
}
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.button1});
this.Text = "Anchoring (and Docking) Controls";
// dock Top
button1.Dock = DockStyle.Top;
button1.Text = "Anchor: " + button1.Anchor.ToString() +
"
Dock: " + button1.Dock.ToString();
}
static void Main()
{
Application.Run(new AnchorForm());
}
}
Dock Style: Bottom
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class AnchorForm : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
public AnchorForm()
{
InitializeComponent();
CenterToScreen();
}
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.button1});
this.Text = "Anchoring (and Docking) Controls";
//dock Bottom
button1.Dock = DockStyle.Bottom;
button1.Text = "Anchor: " + button1.Anchor.ToString() +
"
Dock: " + button1.Dock.ToString();
}
static void Main()
{
Application.Run(new AnchorForm());
}
}
Dock Style: Left
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class AnchorForm : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
public AnchorForm()
{
InitializeComponent();
CenterToScreen();
}
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.button1});
this.Text = "Anchoring (and Docking) Controls";
// dock Left
button1.Dock = DockStyle.Left;
button1.Text = "Anchor: " + button1.Anchor.ToString() +
"
Dock: " + button1.Dock.ToString();
}
static void Main()
{
Application.Run(new AnchorForm());
}
}
Dock Style: Right
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class AnchorForm : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
public AnchorForm()
{
InitializeComponent();
CenterToScreen();
}
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.button1});
this.Text = "Anchoring (and Docking) Controls";
//dock Right
button1.Dock = DockStyle.Right;
button1.Text = "Anchor: " + button1.Anchor.ToString() +
"
Dock: " + button1.Dock.ToString();
}
static void Main()
{
Application.Run(new AnchorForm());
}
}