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/*
KeePass Password Safe - The Open-Source Password Manager
Copyright (C) 2003-2012 Dominik Reichl <dominik.reichl@t-online.de>
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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Windows.Forms;
using KeePass.Resources;
namespace KeePass.UI
{
public delegate void SortCommandHandler(bool bEnableSorting, int nColumn,
SortOrder? soForce, bool bUpdateEntryList);
public sealed class ListViewSortMenu
{
private ToolStripMenuItem m_tsmiMenu;
private ListView m_lv;
private SortCommandHandler m_h;
private int m_iCurSortColumn = -1;
private bool m_bCurSortAsc = true;
private ToolStripMenuItem m_tsmiInitDummy = null;
private ToolStripMenuItem m_tsmiNoSort = null;
private ToolStripSeparator m_tssSep0 = null;
private List<ToolStripMenuItem> m_vColumns = null;
private ToolStripSeparator m_tssSep1 = null;
private ToolStripMenuItem m_tsmiAsc = null;
private ToolStripMenuItem m_tsmiDesc = null;
public ListViewSortMenu(ToolStripMenuItem tsmiContainer, ListView lvTarget,
SortCommandHandler h)
{
if(tsmiContainer == null) throw new ArgumentNullException("tsmiContainer");
if(lvTarget == null) throw new ArgumentNullException("lvTarget");
if(h == null) throw new ArgumentNullException("h");
m_tsmiMenu = tsmiContainer;
m_lv = lvTarget;
m_h = h;
m_tsmiInitDummy = new ToolStripMenuItem(KPRes.NoSort);
m_tsmiMenu.DropDownItems.Add(m_tsmiInitDummy);
m_tsmiMenu.DropDownOpening += this.UpdateMenu;
}
public void Release()
{
if(m_tsmiMenu != null)
{
DeleteMenuItems();
m_tsmiMenu.DropDownOpening -= this.UpdateMenu;
m_tsmiMenu = null;
m_lv = null;
m_h = null;
}
}
private void DeleteMenuItems()
{
if(m_tsmiInitDummy != null)
{
m_tsmiMenu.DropDownItems.Remove(m_tsmiInitDummy);
m_tsmiInitDummy = null;
}
if(m_tsmiNoSort == null) return;
m_tsmiNoSort.Click -= this.OnNoSort;
foreach(ToolStripMenuItem tsmiCol in m_vColumns)
tsmiCol.Click -= this.OnSortColumn;
m_tsmiAsc.Click -= this.OnSortAscDesc;
m_tsmiDesc.Click -= this.OnSortAscDesc;
m_tsmiMenu.DropDownItems.Clear();
m_tsmiNoSort = null;
m_tssSep0 = null;
m_vColumns = null;
m_tssSep1 = null;
m_tsmiAsc = null;
m_tsmiDesc = null;
}
private void UpdateMenu(object sender, EventArgs e)
{
if(m_lv == null) { Debug.Assert(false); return; }
DeleteMenuItems();
IComparer icSorter = m_lv.ListViewItemSorter;
ListSorter ls = ((icSorter != null) ? (icSorter as ListSorter) : null);
if(ls != null)
{
m_iCurSortColumn = ls.Column;
m_bCurSortAsc = (ls.Order != SortOrder.Descending);
if((ls.Order == SortOrder.None) || (m_iCurSortColumn >= m_lv.Columns.Count))
m_iCurSortColumn = -1;
}
else m_iCurSortColumn = -1;
m_tsmiNoSort = new ToolStripMenuItem(KPRes.NoSort);
if(m_iCurSortColumn < 0) SetRadioChecked(m_tsmiNoSort);
m_tsmiNoSort.Click += this.OnNoSort;
m_tsmiMenu.DropDownItems.Add(m_tsmiNoSort);
m_tssSep0 = new ToolStripSeparator();
m_tsmiMenu.DropDownItems.Add(m_tssSep0);
m_vColumns = new List<ToolStripMenuItem>();
foreach(ColumnHeader ch in m_lv.Columns)
{
string strText = (ch.Text ?? string.Empty);
strText = strText.Replace(@"&", @"&&");
ToolStripMenuItem tsmi = new ToolStripMenuItem(strText);
if(ch.Index == m_iCurSortColumn) SetRadioChecked(tsmi);
tsmi.Click += this.OnSortColumn;
m_vColumns.Add(tsmi);
m_tsmiMenu.DropDownItems.Add(tsmi);
}
m_tssSep1 = new ToolStripSeparator();
m_tsmiMenu.DropDownItems.Add(m_tssSep1);
m_tsmiAsc = new ToolStripMenuItem(KPRes.Ascending);
if((m_iCurSortColumn >= 0) && m_bCurSortAsc) SetRadioChecked(m_tsmiAsc);
m_tsmiAsc.Click += this.OnSortAscDesc;
if(m_iCurSortColumn < 0) m_tsmiAsc.Enabled = false;
m_tsmiMenu.DropDownItems.Add(m_tsmiAsc);
m_tsmiDesc = new ToolStripMenuItem(KPRes.Descending);
if((m_iCurSortColumn >= 0) && !m_bCurSortAsc) SetRadioChecked(m_tsmiDesc);
m_tsmiDesc.Click += this.OnSortAscDesc;
if(m_iCurSortColumn < 0) m_tsmiDesc.Enabled = false;
m_tsmiMenu.DropDownItems.Add(m_tsmiDesc);
}
private void OnNoSort(object sender, EventArgs e)
{
if(m_h == null) { Debug.Assert(false); return; }
m_h(false, 0, null, true);
}
private void OnSortColumn(object sender, EventArgs e)
{
if(m_h == null) { Debug.Assert(false); return; }
ToolStripMenuItem tsmi = (sender as ToolStripMenuItem);
if(tsmi == null) { Debug.Assert(false); return; }
for(int i = 0; i < m_vColumns.Count; ++i)
{
if(m_vColumns[i] == tsmi)
{
bool bAsc = m_bCurSortAsc;
if(i == m_iCurSortColumn) bAsc = !bAsc; // Toggle
m_h(true, i, bAsc ? SortOrder.Ascending : SortOrder.Descending, true);
break;
}
}
}
private void OnSortAscDesc(object sender, EventArgs e)
{
if(m_h == null) { Debug.Assert(false); return; }
if(m_iCurSortColumn < 0) { Debug.Assert(false); return; }
ToolStripMenuItem tsmi = (sender as ToolStripMenuItem);
if(tsmi == null) { Debug.Assert(false); return; }
if((tsmi == m_tsmiAsc) && !m_bCurSortAsc)
m_h(true, m_iCurSortColumn, SortOrder.Ascending, true);
else if((tsmi == m_tsmiDesc) && m_bCurSortAsc)
m_h(true, m_iCurSortColumn, SortOrder.Descending, true);
}
private static void SetRadioChecked(ToolStripMenuItem tsmi)
{
tsmi.Image = Properties.Resources.B16x16_MenuRadio;
tsmi.CheckState = CheckState.Checked;
}
}
}
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