VisionEdit/UsingControl/HZHControls/Controls/List/UCHorizontalList.cs

// ***********************************************************************
// Assembly         : HZH_Controls
// Created          : 08-08-2019
//
// ***********************************************************************
// <copyright file="UCHorizontalList.cs">
//     Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
// </copyright>
//
// Blog: https://www.cnblogs.com/bfyx
// GitHub：https://github.com/kwwwvagaa/NetWinformControl
// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
//
// If you use this code, please keep this note.
// ***********************************************************************
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace HZH_Controls.Controls
{
    /// <summary>
    /// Class UCHorizontalList.
    /// Implements the <see cref="System.Windows.Forms.UserControl" />
    /// </summary>
    /// <seealso cref="System.Windows.Forms.UserControl" />
    public partial class UCHorizontalList : UserControl
    {
        /// <summary>
        /// Gets or sets the selected item.
        /// </summary>
        /// <value>The selected item.</value>
        public UCHorizontalListItem SelectedItem { get; set; }
        /// <summary>
        /// Occurs when [selected item event].
        /// </summary>
        public event EventHandler SelectedItemEvent;
        /// <summary>
        /// The m start item index
        /// </summary>
        private int m_startItemIndex = 0;
        /// <summary>
        /// The is automatic select first
        /// </summary>
        private bool isAutoSelectFirst = true;

        /// <summary>
        /// Gets or sets a value indicating whether this instance is automatic select first.
        /// </summary>
        /// <value><c>true</c> if this instance is automatic select first; otherwise, <c>false</c>.</value>
        public bool IsAutoSelectFirst
        {
            get { return isAutoSelectFirst; }
            set { isAutoSelectFirst = value; }
        }

        /// <summary>
        /// The data source
        /// </summary>
        private List<KeyValuePair<string, string>> dataSource = null;

        /// <summary>
        /// Gets or sets the data source.
        /// </summary>
        /// <value>The data source.</value>
        public List<KeyValuePair<string, string>> DataSource
        {
            get { return dataSource; }
            set
            {
                dataSource = value;
                ReloadSource();
            }
        }
        private Color selectedColor = Color.FromArgb(255, 77, 59);

        [Description("选中颜色"), Category("自定义")]
        public Color SelectedColor
        {
            get { return selectedColor; }
            set { selectedColor = value; }
        }
        /// <summary>
        /// Initializes a new instance of the <see cref="UCHorizontalList" /> class.
        /// </summary>
        public UCHorizontalList()
        {
            InitializeComponent();
        }

        /// <summary>
        /// Reloads the source.
        /// </summary>
        public void ReloadSource()
        {
            try
            {
                ControlHelper.FreezeControl(this, true);
                this.panList.SuspendLayout();
                this.panList.Controls.Clear();
                this.panList.Width = this.panMain.Width;
                if (DataSource != null)
                {
                    foreach (var item in DataSource)
                    {
                        UCHorizontalListItem uc = new UCHorizontalListItem();
                        uc.SelectedColor = selectedColor;
                        uc.DataSource = item;
                        uc.SelectedItem += uc_SelectItem;
                        this.panList.Controls.Add(uc);
                    }
                }
                this.panList.ResumeLayout(true);
                if (this.panList.Controls.Count > 0)
                    this.panList.Width = panMain.Width + this.panList.Controls[0].Location.X * -1;
                this.panList.Location = new Point(0, 0);
                m_startItemIndex = 0;
                if (this.panList.Width > panMain.Width)
                    panRight.Visible = true;
                else
                    panRight.Visible = false;
                panLeft.Visible = false;
                panList.SendToBack();
                panRight.SendToBack();
                if (isAutoSelectFirst && DataSource != null && DataSource.Count > 0)
                {
                    SelectItem((UCHorizontalListItem)this.panList.Controls[0]);
                }
            }
            finally
            {
                ControlHelper.FreezeControl(this, false);
            }
        }

        /// <summary>
        /// Handles the SelectItem event of the uc control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
        void uc_SelectItem(object sender, EventArgs e)
        {
            SelectItem(sender as UCHorizontalListItem);
        }

        /// <summary>
        /// Selects the item.
        /// </summary>
        /// <param name="item">The item.</param>
        private void SelectItem(UCHorizontalListItem item)
        {
            if (SelectedItem != null && !SelectedItem.IsDisposed)
                SelectedItem.SetSelect(false);
            SelectedItem = item;
            SelectedItem.SetSelect(true);
            if (SelectedItemEvent != null)
                SelectedItemEvent(item, null);
        }

        /// <summary>
        /// Handles the MouseDown event of the panLeft control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="MouseEventArgs" /> instance containing the event data.</param>
        private void panLeft_MouseDown(object sender, MouseEventArgs e)
        {
            if (this.panList.Location.X >= 0)
            {
                this.panList.Location = new Point(0, 0);
                return;
            }

            for (int i = m_startItemIndex; i >= 0; i--)
            {
                if (this.panList.Controls[i].Location.X < this.panList.Controls[m_startItemIndex].Location.X - panMain.Width)
                {
                    m_startItemIndex = i + 1;
                    break; ;
                }
                if (i == 0)
                {
                    m_startItemIndex = 0;
                }
            }

            ResetListLocation();
            panRight.Visible = true;
            if (this.panList.Location.X >= 0)
            {
                panLeft.Visible = false;
            }
            else
            {
                panLeft.Visible = true;
            }
            panList.SendToBack();
            panRight.SendToBack();
        }

        /// <summary>
        /// Handles the MouseDown event of the panRight control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="MouseEventArgs" /> instance containing the event data.</param>
        private void panRight_MouseDown(object sender, MouseEventArgs e)
        {
            if (this.panList.Location.X + this.panList.Width <= this.panMain.Width)
                return;
            if (this.panList.Controls.Count <= 0)
                return;
            for (int i = m_startItemIndex; i < this.panList.Controls.Count; i++)
            {
                if (this.panList.Location.X + this.panList.Controls[i].Location.X + this.panList.Controls[i].Width > panMain.Width)
                {
                    m_startItemIndex = i;
                    break;
                }
            }
            ResetListLocation();
            panLeft.Visible = true;
            if (panList.Width + panList.Location.X <= panMain.Width)
                panRight.Visible = false;
            else
                panRight.Visible = true;
            panList.SendToBack();
            panRight.SendToBack();
        }

        /// <summary>
        /// Resets the list location.
        /// </summary>
        private void ResetListLocation()
        {
            if (this.panList.Controls.Count > 0)
            {
                this.panList.Location = new Point(this.panList.Controls[m_startItemIndex].Location.X * -1, 0);
            }
        }

        /// <summary>
        /// Sets the select.
        /// </summary>
        /// <param name="strKey">The string key.</param>
        public void SetSelect(string strKey)
        {
            foreach (UCHorizontalListItem item in this.panList.Controls)
            {
                if (item.DataSource.Key == strKey)
                {
                    SelectItem(item);
                    return;
                }
            }
        }
    }
}