Panel array [modified]

[peropata]

Hi , suppose I have a class that draws an image on panel on Form1. How do I dynamically create a number of panels on a Form1, each containing a drawing derived from graphics class and at the same time change properties of each image seperatly.

modified on Tuesday, April 6, 2010 2:43 PM

[WillemM]

You can add panels dynamically to a form by doing something similar to the following: Form parentForm; // Set this to the form you want the panels added to

foreach(var drawing in Drawings)
{
MyCustomPanel myPanel = new MyCustomPanel();
myPanel.Drawing = drawing;

// Set the location and size to the values you need

parentForm.Controls.Add(myPanel);
}

The trick here is to create a custom control derived from panel that will paint the drawing you assign to it. Here's a basic skeleton to get you on the way

public class MyCustomPanel: Panel
{
public Drawing Drawing { get; set; }

protected override void OnPaint(object sender,PaintEventArgs e)
{
// Draw the image here using e.Graphics
}
}

WM. My blog

[peropata]

Here is my code: Class for drawing different shapes (selected by iSelectShape):

public class ShapeDrawing
{
private int iSelectShape = 1;

    public int SelectShape
    {
        get { return iSelectShape; }
        set { iSelectShape = value; }
    }

    public void DrawShape(Graphics g)
    {
        Rectangle r = new Rectangle(new Point(0, 0), new Size(100, 100));
        
        switch (iSelectShape)
        {
            case 1:
                g.DrawEllipse(Pens.Black , r);
                break;
            case 2:
                g.DrawRectangle(Pens.Black, r);
                break;
        }
    }
}

Custom panel class:

public class MyCustomPanel : Panel
{
    public ShapeDrawing Drawing { get; set; }

    protected override void OnPaint(PaintEventArgs e)
    {
        // Draw the image here using e.Graphics
        if (Drawing != null)
            Drawing.DrawShape(e.Graphics);
    }
}

And main form with one panel:

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();

        ShapeDrawing shape1 = new ShapeDrawing();
        myPanel.Drawing = shape1;
        shape1.SelectShape = 2;
    }

    private void myPanel\_Paint(object sender, PaintEventArgs e)
    {

    }

}

and InitializeComponent

private void InitializeComponent()
{
this.myPanel = new Dynamic_controls_panel.MyCustomPanel();
this.SuspendLayout();
//
// myPanel
//
this.myPanel.BackColor = System.Drawing.Color.White;
this.myPanel.Drawing = null;
this.myPanel.Location = new System.Drawing.Point(0, 0);
this.myPanel.Name = "myPanel";
this.myPanel.Size = new System.Drawing.Size(301, 331);
this.myPanel.TabIndex = 0;
this.myPanel.Paint += new System.Windows.Forms.PaintEventHandler(this.myPanel_Paint);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(416, 459);
this.Controls.Add(this.myPanel);
this.Name = "Form1";