C#, Libikóka

kijato

Jun 25th, 2025

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/*
Feladatkiírás:
30. Rajzoljunk egy libikókát (vizszintes egyenes, középen forgásponttal, ami egy kis kör). Mindkét vége
felett egy-egy textboxba beirjuk a gyerek súlyát, aki ráült. Ha azonos a két súly, a libikóka
vizszintes marad, ha valamelyik nehezebb, abba az irányba lesüllyed, miközben a forgáspont a helyén marad.
// csc.exe -debug+ -target:winexe -r:System.Windows.Forms.dll -r:System.Drawing.dll program.cs
*/
using System;
using System.Drawing;
using System.Windows.Forms;
public class Program
{
static int formWidth = 600, formHeight = 400;
static int angle;
static Form f = new Form()
{
Size = new Size(formWidth, formHeight),
FormBorderStyle = FormBorderStyle.FixedSingle,
Text = "Libikóka"
};
static TextBox tbLeft = new TextBox()
{
Location = new Point(100, 80)
};
static TextBox tbRight = new TextBox()
{
Location = new Point(400, 80)
};
static Label l = new Label()
{
Location = new Point(5, formHeight-60),
Size = new Size(formWidth-10, 20),
};
[STAThread]
static void Main()
{
f.Paint += new PaintEventHandler(Form1_Paint);
f.Controls.Add(tbLeft);
f.Controls.Add(tbRight);
f.Controls.Add(l);
tbLeft.TextChanged += new System.EventHandler(TextChanged);
tbRight.TextChanged += new System.EventHandler(TextChanged);
Application.Run(f);
}
static void TextChanged(object sender, EventArgs e)
{
int t1 = 0, t2 = 0;
//int max_angle = 20;
try
{
t1 = tbLeft.Text.Trim().Equals("") ? 0 : int.Parse(tbLeft.Text.Trim());
t2 = tbRight.Text.Trim().Equals("") ? 0 : int.Parse(tbRight.Text.Trim());
if (t1 < t2) angle = 15;
else if (t1 > t2) angle = -15;
else angle = 0;
//angle = Math.Max(-max_angle, Math.Min(max_angle, (t2 - t1) * 2));
l.Text = "";
}
catch (Exception ex)
{
l.Text = ex.Message;
angle = 0;
}
f.Invalidate();
}
static void Form1_Paint(object sender, PaintEventArgs e)
{
{
e.Graphics.TranslateTransform(formWidth/2, formHeight/2);
e.Graphics.RotateTransform(angle);
e.Graphics.DrawLine(new Pen(Color.Red, 5), -200, 0, 200, 0);
e.Graphics.ResetTransform();
e.Graphics.DrawEllipse(new Pen(Color.Black, 3), formWidth / 2, formHeight / 2, 10, 10);
}
}
}

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