using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
public class MainForm : Form {
private PictureBox happyBox = new PictureBox();
private int oldX, oldY;
private bool isDragging;
private Rectangle dropRect = new Rectangle(100, 100, 140, 170);
public MainForm() {
happyBox.SizeMode = PictureBoxSizeMode.StretchImage;
happyBox.Location = new System.Drawing.Point(64, 32);
happyBox.Size = new System.Drawing.Size(50, 50);
happyBox.Cursor = Cursors.Hand;
happyBox.Image = new Bitmap("happyDude.bmp");
happyBox.MouseDown += new MouseEventHandler(happyBox_MouseDown);
happyBox.MouseUp += new MouseEventHandler(happyBox_MouseUp);
happyBox.MouseMove += new MouseEventHandler(happyBox_MouseMove);
Controls.Add(happyBox);
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(292, 361);
this.Text = "Dragging Images";
this.Paint += new System.Windows.Forms.PaintEventHandler(this.MainForm_Paint);
}
void happyBox_MouseMove(object sender, MouseEventArgs e) {
if (isDragging) {
happyBox.Top = happyBox.Top + (e.Y - oldY);
happyBox.Left = happyBox.Left + (e.X - oldX);
}
}
void happyBox_MouseUp(object sender, MouseEventArgs e) {
isDragging = false;
if (dropRect.Contains(happyBox.Bounds))
MessageBox.Show("You win!", "What an amazing test of skill...");
}
void happyBox_MouseDown(object sender, MouseEventArgs e) {
isDragging = true;
oldX = e.X;
oldY = e.Y;
}
private void MainForm_Paint(object sender, PaintEventArgs e) {
Graphics g = e.Graphics;
g.FillRectangle(Brushes.BlueViolet, dropRect);
g.DrawString("Drag the happy guy in here...",new Font("Times New Roman", 25), Brushes.WhiteSmoke, dropRect);
}
[STAThread]
static void Main() {
Application.EnableVisualStyles();
Application.Run(new MainForm());
}
}
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