LSLEditor/source/Editor/GListBoxWindow.cs

// <copyright file="gpl-2.0.txt">
// ORIGINAL CODE BASE IS Copyright (C) 2006-2010 by Alphons van der Heijden.
// The code was donated on 2010-04-28 by Alphons van der Heijden to Brandon 'Dimentox Travanti' Husbands &
// Malcolm J. Kudra, who in turn License under the GPLv2 in agreement with Alphons van der Heijden's wishes.
//
// The community would like to thank Alphons for all of his hard work, blood sweat and tears. Without his work
// the community would be stuck with crappy editors.
//
// The source code in this file ("Source Code") is provided by The LSLEditor Group to you under the terms of the GNU
// General Public License, version 2.0 ("GPL"), unless you have obtained a separate licensing agreement ("Other
// License"), formally executed by you and The LSLEditor Group.
// Terms of the GPL can be found in the gplv2.txt document.
//
// GPLv2 Header
// ************
// LSLEditor, a External editor for the LSL Language.
// Copyright (C) 2010 The LSLEditor Group.
//
// 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 2 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, write to the Free
// Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
// ********************************************************************************************************************
// The above copyright notice and this permission notice shall be included in copies or substantial portions of the
// Software.
// ********************************************************************************************************************
// </copyright>
//
// <summary>
//
//
// </summary>

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

namespace LSLEditor
{
	public partial class GListBoxWindow : Form
	{
		public GListBox GListBox
		{
			get
			{
				return this.gListBox1;
			}
		}

		public GListBoxItem Selected
		{
			get
			{
				return (GListBoxItem)this.gListBox1.Items[this.gListBox1.SelectedIndex];
			}
		}

		public GListBoxWindow(Form parent)
		{
			InitializeComponent();

			this.Owner = parent;

			this.GListBox.Cursor = Cursors.Arrow;
			this.GListBox.Sorted = true;

			this.FontChanged += new EventHandler(GListBoxWindow_FontChanged);
		}

		void GListBoxWindow_FontChanged(object sender, EventArgs e)
		{
			this.GListBox.ItemHeight = 2 + (int)LSLEditor.Helpers.Measure.MeasureDisplayString(this.GListBox, "M", this.Font).Height;
		}

		public void KeyDownHandler(KeyEventArgs e)
		{
			if (!this.Visible)
				return;

			if (e.KeyCode == Keys.Enter)
			{
				// cancel richttext enter if listbox shows
				e.Handled = true;
			}
			if (e.KeyCode == Keys.Down)
			{
				this.gListBox1.SelectedIndex = Math.Min(this.gListBox1.Items.Count - 1, this.gListBox1.SelectedIndex + 1);
				e.Handled = true;
			}

			if (e.KeyCode == Keys.Up)
			{
				this.gListBox1.SelectedIndex = Math.Max(0, this.gListBox1.SelectedIndex - 1);
				e.Handled = true;
			}

			if (e.KeyCode == Keys.PageUp)
			{
				this.gListBox1.SelectedIndex = Math.Max(0,this.gListBox1.SelectedIndex - 10);
				e.Handled = true;
			}

			if (e.KeyCode == Keys.PageDown)
			{
				this.gListBox1.SelectedIndex = Math.Min(this.gListBox1.Items.Count - 1, this.gListBox1.SelectedIndex + 10);
				e.Handled = true;
			}
		}

		public void SetPosition(Rectangle rect,RichTextBox RichTextBox)
		{
			//Rectangle rect = Screen.PrimaryScreen.WorkingArea;
			Point p = RichTextBox.GetPositionFromCharIndex(RichTextBox.SelectionStart);

			p = new Point(p.X - 20, p.Y + this.gListBox1.ItemHeight); // ItemHeight = exact line height

			Rectangle client = RichTextBox.ClientRectangle;
			if (p.X < (client.Left-20) || p.Y < client.Top || p.X > client.Width || p.Y > client.Height)
			{
				this.Visible = false;
				return;
			}

			Point screen = RichTextBox.PointToScreen(p);

			//if ((screen.Y + this.Height) > rect.Height)
			//	screen = RichTextBox.PointToScreen(new Point(p.X - 20 + this.XOffset, p.Y - this.Height));

			if (screen.Y > rect.Bottom)
			{
				this.Visible = false;
				return;
				//screen.Y = rect.Bottom;
			}

			if (screen.X > rect.Right)
			{
				this.Visible = false;
				return;
				//screen.X = rect.Right;
			}

			if (screen.X < rect.Left)
			{
				this.Visible = false;
				return;
				//screen.X = rect.Left;
			}

			if ((screen.Y) < rect.Top)
			{
				this.Visible = false;
				return;
				//screen.Y = rect.Top;
			}
			
			this.Location = screen;
		}

		private void gListBox1_Resize(object sender, EventArgs e)
		{
			this.Size = this.gListBox1.Size;
		}

	}
}