using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using SharpConfig;
using Telerik.WinControls.UI;
namespace Recent
{
public class RecentFolders
{
readonly RadSplitButtonElement _param_Button;
readonly string _param_FileName;
readonly string _param_SectionName;
readonly int _param_MaxDisplayItems;
public readonly FolderBrowserDialog Dialog;
List<string> _items;
public event EventHandler<RecentFolderChangingEventArgs> RecentFolderChanging;
public event EventHandler<RecentFolderChangedEventArgs> RecentFolderChanged;
/// <summary>
///
/// </summary>
/// <param name="form"></param>
/// <param name="button">For RadSplitButton, use DropDownButtonElement</param>
/// <param name="fileName"></param>
/// <param name="sectionName"></param>
/// <param name="maxDisplayItems"></param>
public RecentFolders(Form form, RadSplitButtonElement button, string fileName, string sectionName = "Recent", int maxDisplayItems = 10)
{
_param_Button = button;
_param_FileName = fileName;
_param_SectionName = sectionName;
_param_MaxDisplayItems = maxDisplayItems;
form.FormClosed +=
(sender, e) => Save();
var browse = new RadMenuItem();
browse.Click +=
(sender, e) => OnBrowseClick();
_param_Button.DefaultItem = browse;
_items = new List<string>();
Dialog = new FolderBrowserDialog();
Dialog.ShowNewFolderButton = false;
Load();
}
void Load()
{
if (File.Exists(_param_FileName))
{
try
{
Configuration cfg = Configuration.LoadFromFile(_param_FileName);
if (cfg.Contains(_param_SectionName))
{
foreach (var setting in cfg[_param_SectionName])
_items.Add(setting.StringValue);
if (_items.Count != 0)
{
Dialog.SelectedPath = _items[0];
}
}
}
catch
{
}
}
UpdateUI();
}
void Save()
{
Configuration cfg = null;
if (File.Exists(_param_FileName))
{
try
{
cfg = Configuration.LoadFromFile(_param_FileName);
if (cfg.Contains(_param_SectionName))
cfg.Remove(_param_SectionName);
}
catch
{
}
}
if (cfg == null)
cfg = new Configuration();
var section = new Section(_param_SectionName);
for (int i = 0; i < _items.Count; i++)
{
section.Add(new Setting((i + 1).ToString(), _items[i]));
}
cfg.Add(section);
cfg.SaveToFile(_param_FileName);
}
void UpdateUI()
{
_param_Button.Items.Clear();
if (_items.Count != 0)
{
int count =
_items.Count > _param_MaxDisplayItems ?
_param_MaxDisplayItems :
_items.Count;
for (int i = 0; i < count; i++)
{
var item = new RadMenuItem(_items[i]);
item.Click +=
(sender, e) => OnItemClick(((RadMenuItem)sender).Text);
_param_Button.Items.Add(item);
}
_param_Button.Items.Add(new RadMenuSeparatorItem());
var clear = new RadMenuItem("Clear Recent List");
clear.Click +=
(sender, e) => OnClearClick();
_param_Button.Items.Add(clear);
_param_Button.ArrowButton.Enabled = true;
}
else
{
// Telerik Issue: If RadSplitButton is placed on RadForm, then this is not working.
_param_Button.ArrowButton.Enabled = false;
}
}
void OnBrowseClick()
{
if (Continue())
{
if (Dialog.ShowDialog() == DialogResult.OK)
{
AddToTop(Dialog.SelectedPath);
}
}
}
void OnItemClick(string path)
{
if (Continue())
{
if (Directory.Exists(path))
{
AddToTop(path);
Dialog.SelectedPath = path;
}
else
{
string s = string.Format("The folder '{0}' cannot be opened.\n\nDo you want to remove the reference to it from the Recent List?", path);
if (MessageBox.Show(s, "", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
_items.Remove(path);
UpdateUI();
}
if (_items.Count != 0)
_param_Button.ShowDropDown();
}
}
}
bool Continue()
{
if (RecentFolderChanging != null)
{
var args = new RecentFolderChangingEventArgs();
RecentFolderChanging.Invoke(this, args);
return !args.Cancel;
}
return true;
}
void OnClearClick()
{
_items =
_items
.Skip(_param_MaxDisplayItems)
.ToList();
UpdateUI();
if (_items.Count != 0)
_param_Button.ShowDropDown();
}
void AddToTop(string path)
{
int index = _items.FindIndex(s => s.Equals(path, StringComparison.OrdinalIgnoreCase));
if (index != 0)
{
// Exist?
if (index != -1)
_items.RemoveAt(index);
_items.Insert(0, path);
UpdateUI();
}
if (RecentFolderChanged != null)
{
RecentFolderChanged.Invoke(this, new RecentFolderChangedEventArgs(path));
}
}
}
public class RecentFolderChangingEventArgs : CancelEventArgs
{
public RecentFolderChangingEventArgs(bool cancel = false)
: base(cancel)
{
}
}
public class RecentFolderChangedEventArgs : EventArgs
{
public string Path { get; private set; }
public RecentFolderChangedEventArgs(string path)
{
Path = path;
}
}
}
To use, Add RadSplitButton or RadSplitButtonElement in RadForm or RadRibbonForm respectively and use following code...
Where...
Please post suggestions or queries.