math-suite/Source/MatrixCalculator/Forms/NumericInput.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 MatrixCalculator
{
    public partial class NumericInput : Form
    {
        public enum NumberType { Integer, Real };

        #region Data
        bool allowExit = true;

        private NumberType type;
        public NumberType Type {
            get { return type; }

            set
            {
                if (value == NumberType.Integer) labelMessage.Text = "Insert an integer number:";
                else labelMessage.Text = "Insert a real number:";

                type = value;
            }
        }

        public double NumberReal
        {
            get {
                double ret = 0;
                double.TryParse(inputBox.Text, out ret);
                return ret;
            }

            set {
                inputBox.Text = value.ToString();
            }
        }

        public int NumberInt
        {
            get {
                int ret = 0;
                int.TryParse(inputBox.Text, out ret);
                return ret;
            }

            set {
                inputBox.Text = value.ToString();
            }
        }
        #endregion

        public NumericInput(NumberType t = NumberType.Real)
        {
            InitializeComponent();
            Type = t;
        }

        private void buttonAccept_Click(object sender, EventArgs e)
        {
            this.DialogResult = System.Windows.Forms.DialogResult.OK;

            // Validate input
            bool ok = true;
            double val;
            int vali;

            if (Type == NumberType.Real) ok = double.TryParse(inputBox.Text, out val);
            else ok = int.TryParse(inputBox.Text, out vali);

            // Is everything ok?
            if (!ok)
            {
                allowExit = false;
                inputBox.BackColor = Color.LightPink;
                labelMessage.Font = new Font(labelMessage.Font, FontStyle.Bold);
            }
        }

        private void buttonCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            this.Close();
        }

        private void NumericInput_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!allowExit)
            {
                allowExit = true;
                e.Cancel = true;
            }
        }

        #region Paint
        protected override void OnPaintBackground(PaintEventArgs e)
        {
            DynamicLink.Controls.BackgroundGradient.Paint(e.Graphics, new Rectangle(-1, -1, this.Width, this.Height));
        }
        #endregion

    }
}