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IOTextBox.cs
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/
IOTextBox.cs
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//-----------------------------------------------------------------------
// <copyright file="IOTextBox.cs" company="NoteFly">
// NoteFly a note application.
// Copyright (C) 2012 Tom
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// </copyright>
//-----------------------------------------------------------------------
namespace NoteFly
{
using System.Drawing;
using System.IO;
using System.Windows.Forms;
/// <summary>
/// IOTextBox control
/// </summary>
internal partial class IOTextBox : TextBox
{
/// <summary>
/// Is there text set.
/// </summary>
private bool setuptext = false;
/// <summary>
/// Avoid illegal path characters
/// </summary>
/// <param name="e">Keyboard event arguments</param>
protected override void OnKeyDown(KeyEventArgs e)
{
char[] forbiddenpathchars = Path.GetInvalidPathChars();
for (int i = 0; i < forbiddenpathchars.Length; i++)
{
if (e.KeyValue == System.Convert.ToInt32(forbiddenpathchars[i]))
{
if (e.KeyData != Keys.Back && e.KeyData != Keys.Delete && e.KeyData != Keys.Shift && e.KeyData != Keys.ShiftKey && e.KeyData != Keys.CapsLock)
{
e.SuppressKeyPress = true;
}
}
}
base.OnKeyDown(e);
}
/// <summary>
/// Check file path or path if it exists,
/// only after IOTextBox is been created.
/// </summary>
/// <param name="e">Event arguments</param>
protected override void OnTextChanged(System.EventArgs e)
{
if (this.setuptext)
{
if (File.Exists(this.Text) || Directory.Exists(this.Text))
{
this.BackColor = Color.LightGreen;
}
else
{
this.BackColor = Color.LightSalmon;
}
}
this.setuptext = true;
base.OnTextChanged(e);
}
/// <summary>
/// Change background to inactive control backgroundcolor if control becomes inactive.
/// </summary>
/// <param name="e">Event arguments</param>
protected override void OnEnabledChanged(System.EventArgs e)
{
if (!this.Enabled)
{
this.BackColor = SystemColors.Control;
}
else
{
this.BackColor = SystemColors.Window;
if (this.TextLength > 0)
{
this.OnTextChanged(null);
}
}
base.OnEnabledChanged(e);
}
}
}