Move bar drawing on gridview

[Lek]

from
Demo Application - RadControls for WinForms.
Gridview -> Custom Painting.

I want to move the drawing image in grid view.
- change cursor on mouse over
- drag and drop drawing
- show image moving 

please help me...

[George]

Hello Lek,

Thank you for contacting us.

There is a lot of information in internet about how to drag-drop a drawn shapes. Please, refer to some of the articles I found:

1. http://stackoverflow.com/questions/2442105/drag-and-drop-rectangle-in-c-sharp
2. http://stackoverflow.com/questions/5307938/drag-and-drop-function-with-drawing-rectangle-c-sharp-net-forms
3. http://social.msdn.microsoft.com/forums/wpapps/en-us/26c21f6d-ef4f-4e66-817e-7145d8f57e66/adding-dragdropresizable-selection-rectangle-to-image-editor

You can also try the code below, which enables you to create rectangles on the form and drag-drop them. I used a plain Form for simplicity. The case with RadGridView will be no different.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        this.DoubleBuffered = true;
    }

    Rectangle rec = new Rectangle(0, 0, 0, 0);
    List<Figure> figures = new List<Figure>();
    bool moveFigure;
    Figure currentFigure;
    Figure tempFigure;

    protected override void OnPaint(PaintEventArgs e)
    {
        foreach (Figure figure in figures)
        {
            figure.Draw(e.Graphics);
        }

        if (this.tempFigure != null)
        {
            this.tempFigure.Draw(e.Graphics);
        }
    }

    protected override void OnMouseDown(MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            rec = new Rectangle(e.X, e.Y, 0, 0);
            foreach (var figure in this.figures)
            {
                if (figure.Bounds.Contains(rec))
                {
                    currentFigure = figure;
                    moveFigure = true;
                    break;
                }
            }

            Invalidate();
        }
    }

    protected override void OnMouseMove(MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            if (this.moveFigure)
            {
                this.currentFigure.Bounds = new Rectangle(e.Location.X, e.Location.Y
                    , this.currentFigure.Bounds.Width, this.currentFigure.Bounds.Height);
            }
            else
            {
                rec.Width = e.X - rec.X;
                rec.Height = e.Y - rec.Y;
            }

            this.tempFigure = new Figure
            {
                Bounds = rec,
            };

            Invalidate();
        }

        if (this.moveFigure)
        {
            this.Cursor = Cursors.Hand;
        }
        else
        {
            this.Cursor = Cursors.Default;
        }

    }

    protected override void OnMouseUp(MouseEventArgs e)
    {
        base.OnMouseUp(e);

        this.moveFigure = false;
        this.currentFigure = null;

        figures.Add(this.tempFigure);
    }
}

public class Figure
{
    private Rectangle bounds;
    private Color fill = Color.Blue;

    public Rectangle Bounds
    {
        get { return this.bounds; }
        set { this.bounds = value; }
    }

    public Color Fill
    {
        get { return this.fill; }
        set { this.fill = value; }
    }

    public void Draw(Graphics g)
    {
        g.FillRectangle(new SolidBrush(this.Fill), this.bounds);
    }

    public void Clear(Graphics g, Color color)
    {
        g.Clear(color);
    }
}

I hope this helps.

Regards,
George
Telerik

[Lek]

Thanks, George.

Thanks very much for your answer, I am very glad.
Your code is very simple, I like it.
I will try your suggestion.

Regards
Lek.