Add multiple rectangles to maximum size and location of panel in

hello I need to draw rectangle within panel and panel size(890,850),location(274,12) in this area only i need to draw rectangle inside this area,if overlaps one another that also okay keep that old rectangles untill i click reset button. if the user given data exceed panel size and location show message box in c# windows application....

Try to optimize it, i have below solution for you.

public partial class Form1 : Form
{
List Rectangles = new List();
Pen pen1;
bool IsValid = false;
int x = 274, y = 12, w = 100, h = 200;
public Form1()
{
InitializeComponent();
panel1.Height = 890;
panel1.Width = 850;
}
private void button1_Click(object sender, EventArgs e)
{
if (Validate())
{
panel1.Invalidate();
}
}
private void panel1_Paint(object sender, PaintEventArgs e)
{
if(IsValid){
Rectangle rect = new Rectangle(x, y, w, h);
Rectangles.Add(rect);
foreach (Rectangle re in Rectangles)
{
e.Graphics.DrawRectangle(Pens.Black, re);
}
}
}
private bool Validate()
{
x = Convert.ToInt32(textBox3.Text);
y = Convert.ToInt32(textBox4.Text);
w = Convert.ToInt32(textBox2.Text);
h = Convert.ToInt32(textBox1.Text);
if(x>274||y>12||w>850||h>890){
MessageBox.Show("Please Enter appropriate value ex: x < 274, y < 12, w <850, h < 890");
IsValid = false;
return IsValid;
}
IsValid = true;
return IsValid;
}
private void button2_Click(object sender, EventArgs e)
{
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
IsValid = false;
panel1.Invalidate();
}
}

3 Replies

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S J5y ago
how to do Undo/redo functionality when undo button clicks draw rectangles to be go undo,like same when we use in our paint like that only in c# windows application
Sachin Singh5y ago
it is already like that please try the code once
Sachin Singh5y ago
Try to optimize it, i have below solution for you.
public partial class Form1 : Form
    {
        List Rectangles = new List();

        Pen pen1;
        bool IsValid = false;
        int x = 274, y = 12, w = 100, h = 200;
        public Form1()
        {
            InitializeComponent();
            panel1.Height = 890;
            panel1.Width = 850;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (Validate())
            {
                panel1.Invalidate();
            }
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            if(IsValid){
              Rectangle  rect = new Rectangle(x, y, w, h);
              Rectangles.Add(rect);
              foreach (Rectangle re in Rectangles)
              {
                  e.Graphics.DrawRectangle(Pens.Black, re);
              }

            }

        }

        private bool Validate()
        {
            x = Convert.ToInt32(textBox3.Text);
            y = Convert.ToInt32(textBox4.Text);
            w = Convert.ToInt32(textBox2.Text);
            h = Convert.ToInt32(textBox1.Text);
            if(x>274||y>12||w>850||h>890){

                MessageBox.Show("Please Enter appropriate value ex: x < 274, y < 12, w <850, h < 890");
                IsValid = false;
                return IsValid;

            }
            IsValid = true;
            return IsValid;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
            textBox4.Text = "";
            IsValid = false;
            panel1.Invalidate();
        }
    }