TVP - v6

// Zadatak 1

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 vezba6
{
    public partial class Form1 : Form
    {

        private float broj = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

            e.Graphics.DrawEllipse(Pens.Black, new Rectangle(150, 100, 100, 100));
            e.Graphics.FillEllipse(Brushes.Blue, new Rectangle(150, 100, 100, 100));
            e.Graphics.DrawEllipse(Pens.Black, new Rectangle(20, 100, 100, 100));
        }

        void Crtanje(object sender, PaintEventArgs e)
        {
            Rectangle r = new Rectangle(150, 100, 100, 100);

            e.Graphics.FillEllipse(Brushes.Blue, r);
            e.Graphics.FillPie(Brushes.Red, r, -90, broj);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (float.TryParse(textBox1.Text, out broj))
            {
                this.Paint += Crtanje;
                broj *= (float)3.6;
                this.Invalidate();
            }
            else {
                MessageBox.Show("Neispravan unos!");
            }



        }
    }
}

// Zadatak 2

// Form1.cs

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 vezba6
{
    public partial class Form1 : Form
    {
        Random random;
        int sirina, visina;
        Rectangle r;

        public delegate void PronadjenPravougaonik(object sender, Rectangle rect, bool nadjen);
        public event PronadjenPravougaonik generisanje;

        public Form1()
        {
            random = new Random();
            sirina = visina = 30;
            this.generisanje += GenerisiPravougaonik;
            //timer1.Enabled = true; --- NE RADI NA VS 2010

            InitializeComponent();
        }

        void GenerisiPravougaonik(object sender, Rectangle rect, bool nadjen)
        {
            int x = random.Next(0, this.ClientRectangle.Width - sirina - 1);
            int y = random.Next(0, this.ClientRectangle.Height - visina - 1);

            r = new Rectangle(x, y, sirina, visina);

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            generisanje(this, r, false);
        }

        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if (r.Contains(e.Location))
                generisanje(this, r, true);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Form2 form2 = new Form2(this);
            form2.Size = this.Size;
            form2.Show();
        }

    }
}

// Form2.cs

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 vezba6
{
    public partial class Form2 : Form
    {
        Form1 form1;
        List<Rectangle> lista;

        public Form2()
        {
            InitializeComponent();
        }
        // Dobra praksa down below:
        public Form2(Form1 form1) : this()
        {
            this.form1 = form1;
            this.lista = new List<Rectangle>();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            this.form1.generisanje += Pronalazenje;
        }

        void Pronalazenje(object sender, Rectangle rect, bool nadjen) {
            if (nadjen) {
                lista.Add(rect);
                this.Invalidate();
            }
        }

        void Crtanje(Graphics g) {
            foreach (Rectangle r in lista)
                g.FillRectangle(Brushes.Red, r);
        }

        private void Form2_Paint(object sender, PaintEventArgs e)
        {
            Crtanje(e.Graphics);
        }
    }
}