RightClickableDataGridView.cs :  » Network-Clients » iReaper » IReaper » BaseControl » C# / CSharp Open Source

using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Windows.Forms;
using System.Drawing;

namespace IReaper.BaseControl{
    /**
     * DataGridView
     *  1. 
     *       1.1 MouseUp
     *       1.2 MouseUpDragDropDragDrop
     *  2. 
     */
    /// <summary>
    /// This class extends datagridview to support right click select row.
    /// </summary>
    public partial class RightClickableDataGridView : DataGridView
    {
        #region field
        bool isDrag = false;
        int mouseDownIndex = -1;
        #endregion

        public RightClickableDataGridView()
        {
            InitializeComponent();
        }

        public RightClickableDataGridView(IContainer container)
        {
            container.Add(this);

            InitializeComponent();
        }

        protected override void OnMouseDown(MouseEventArgs e)
        {
            HitTestInfo info = this.HitTest(e.X, e.Y);
            this.mouseDownIndex = info.RowIndex;
            if (info.RowIndex < 0)
            {
                base.OnMouseDown(e);
                return;
            }
            //
            DataGridViewRow cRow = this.Rows[info.RowIndex];
            this.isDrag = cRow.Selected;
            /* MouseDownResetMouseEventArgs()
             *      
             * 
             * 
             *      MouseDown
             *          
             *      MouseDown
             * 
             */
            //rows
            if (this.isDrag)
            {
                this.ResetMouseEventArgs();
            }
            else if ((e.Button & MouseButtons.Right) == MouseButtons.Right)
            {
                this.ClearSelection();   
                this.SetSelectedRowCore(info.RowIndex, true);
                this.ResetMouseEventArgs();
            }
            else
            {
                base.OnMouseDown(e);
            }
        }

        protected override void OnMouseUp(MouseEventArgs e)
        {
            /* 
             * MouseDown
             *  
             *      MouseDownResetMouseEventArgs()
             */
            HitTestInfo info = this.HitTest(e.X, e.Y);
            if (info.RowIndex < 0)
            {
                base.OnMouseUp(e);
                return;
            }
            if (this.isDrag && info.RowIndex == this.mouseDownIndex && (e.Button & MouseButtons.Left) == MouseButtons.Left)
            {
                this.ClearSelection();
                this.SetSelectedRowCore(info.RowIndex, true);
            }
            else
            {
                base.OnMouseUp(e);
            }
            this.mouseDownIndex = -1;
        }
    }
}