88 lines
2.3 KiB
C#
88 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using Library15Gerimovich.Exceptions;
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namespace Library15Gerimovich
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{
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public partial class InputRealNumber : UserControl
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{
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private event EventHandler? _valueChanged;
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public InputRealNumber()
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{
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InitializeComponent();
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}
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// вещественное число
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public double? DoubleValue
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{
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get
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{
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if (IsNullCheckBox.Checked)
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{
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return null;
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}
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if (string.IsNullOrEmpty(MainTextBox.Text))
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{
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throw new EmptyValueException();
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}
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double ParsedDouble;
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if (double.TryParse(MainTextBox.Text, out ParsedDouble))
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{
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return ParsedDouble;
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}
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else
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{
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throw new MalformedRealException();
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}
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}
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set
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{
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SetNullState(value is null, true);
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if (value is not null)
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{
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MainTextBox.Text = value.ToString();
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}
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}
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}
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public event EventHandler? ValueChanged
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{
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add { _valueChanged += value; }
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remove { _valueChanged -= value; }
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}
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// проверяем нажата ли кнопка is null
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private void SetNullState(bool IsNull, bool ClearText = false)
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{
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IsNullCheckBox.Checked = IsNull;
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MainTextBox.Enabled = !IsNull;
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if (ClearText)
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{
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MainTextBox.Text = string.Empty;
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}
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}
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// проверяем нажата ли кнопка is null
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private void IsNullCheckBox_CheckedChanged(object sender, EventArgs e)
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{
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SetNullState(IsNullCheckBox.Checked);
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_valueChanged?.Invoke(this, e);
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}
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private void MainTextBox_TextChanged(object sender, EventArgs e)
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{
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_valueChanged?.Invoke(this, e);
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}
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}
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}
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