Question : Moving an image along side the Mouse Pointer moves

Hello Experts,

I am developing a windows application using C#.NET. I have 2 controls on one usercontrol (yes in windows application for loading it into the panel control of the MDIParent Form). One is PictureBox & second one is ListView control & latter is populated with some images in it.

Now what I want to achieve is that I want to drag & drop images from ListView to picture box control. And while dragging I want to move image itself along side the mouse pointer. How can I achieve this?

Any help would be appreciated. Thanks !!!

Answer : Moving an image along side the Mouse Pointer moves

I'm not sure what the difference is. I added a ListView, ImageList and PictureBox to a Form. Then I manually added a couple images to my ImageList. The sample code below loads up the Listview with the images I loaded up.

When I run it and drag one of the ListView items I see the actual image during the entire operation. I've added some code to make the image "persistent" in the PictureBox.

I wish I could show a video of what I see but unfortunately CamStudio doesn't capture the custom cursor as I see it. =\

Anyhoo, here is the code I'm testing with. In the screenshot below the PictureBox is the bottom box and I have dropped several of the ListViewItems on it already:

                       
         
           
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             using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms; 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    { 
        [System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
        private static extern bool DestroyIcon(IntPtr handle); 
        private ListViewItem lvi;
        private IntPtr hIcon = IntPtr.Zero; 
        private class ImageDrop
        {
            public Point Location;
            public int ImageIndex;
        } 
        private List Drops = new List(); 
        public Form1()
        {
            InitializeComponent();
        } 
        private void Form1_Load(object sender, EventArgs e)
        {
            for (int i = 0; i < imageList1.Images.Count; i++)
            {
                listView1.Items.Add("Item " + i.ToString(), i);
            } 
            listView1.AllowDrop = true;
            pictureBox1.AllowDrop = true;
        } 
        private void listView1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                lvi = listView1.GetItemAt(e.X, e.Y);
                if (lvi != null)
                {
                    listView1.DoDragDrop(lvi, DragDropEffects.All);
                }
            }
        } 
        private void listView1_GiveFeedback(object sender, GiveFeedbackEventArgs e)
        {
            e.UseDefaultCursors = false;
            if (!hIcon.Equals(IntPtr.Zero))
            {
                DestroyIcon(hIcon);
            } 
            Bitmap bmp = new Bitmap(imageList1.Images[lvi.ImageIndex]);
            hIcon = bmp.GetHicon();
            Cursor.Current = new Cursor(hIcon);
        } 
        private void pictureBox1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.All;
        } 
        private void pictureBox1_DragDrop(object sender, DragEventArgs e)
        {
            Point pt = pictureBox1.PointToClient(new Point(e.X, e.Y));
            ImageDrop id = new ImageDrop();
            id.Location = pt;
            id.ImageIndex = lvi.ImageIndex;
            Drops.Add(id);
            pictureBox1.Refresh();
        } 
        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            foreach (ImageDrop id in Drops)
            {
                e.Graphics.DrawImage(imageList1.Images[id.ImageIndex], id.Location);
            }
        } 
    }
}

           
         

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CustomDragCursor.jpg (56 KB) (File Type Details)

I see the custom cursor during the ENTIRE drag...