|
using System.ComponentModel;
using System.Diagnostics;
using System;
using System.Security.Permissions;
using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel.Design;
using System.Collections;
using Microsoft.Win32;
using System.Globalization;
namespace System.Windows.Forms
{
// A collection of items in a ListViewGroup.
//
internal class ListViewGroupItemCollection : ListView.ListViewItemCollection.IInnerList {
private ListViewGroup group;
private ArrayList items;
public ListViewGroupItemCollection(ListViewGroup group) {
this.group = group;
}
public int Count
{
get
{
return Items.Count;
}
}
private ArrayList Items
{
get
{
if (items == null) {
items = new ArrayList();
}
return items;
}
}
public bool OwnerIsVirtualListView {
get {
if (this.group.ListView != null) {
return group.ListView.VirtualMode;
} else {
return false;
}
}
}
public bool OwnerIsDesignMode {
get {
if (this.group.ListView != null) {
ISite s = group.ListView.Site;
return(s == null) ? false : s.DesignMode;
} else {
return false;
}
}
}
public ListViewItem this[int index] {
get {
return (ListViewItem)Items[index];
}
set {
if (value != Items[index]) {
MoveToGroup((ListViewItem)Items[index], null);
Items[index] = value;
MoveToGroup((ListViewItem)Items[index], this.group);
}
}
}
public ListViewItem Add(ListViewItem value) {
CheckListViewItem(value);
MoveToGroup(value, this.group);
Items.Add(value);
return value;
}
public void AddRange(ListViewItem[] items) {
for (int i = 0; i < items.Length; i ++) {
CheckListViewItem(items[i]);
}
Items.AddRange(items);
for(int i=0; i < items.Length; i++) {
MoveToGroup(items[i], this.group);
}
}
/// <devdoc>
/// throws an ArgumentException if the listViewItem is in another listView already.
/// </devdoc>
private void CheckListViewItem(ListViewItem item) {
if (item.ListView != null && item.ListView != this.group.ListView) {
// Microsoft: maybe we should throw an InvalidOperationException when we add an item from another listView
// into this group's collection.
// But in a similar situation, ListViewCollection throws an ArgumentException. This is the v1.* behavior
throw new ArgumentException(SR.GetString(SR.OnlyOneControl, item.Text), "item");
}
}
public void Clear() {
for(int i=0; i < this.Count; i++) {
MoveToGroup(this[i], null);
}
Items.Clear();
}
public bool Contains(ListViewItem item) {
return Items.Contains(item);
}
public void CopyTo(Array dest, int index) {
Items.CopyTo(dest, index);
}
public IEnumerator GetEnumerator() {
return Items.GetEnumerator();
}
public int IndexOf(ListViewItem item)
{
return Items.IndexOf(item);
}
public ListViewItem Insert(int index, ListViewItem item) {
CheckListViewItem(item);
MoveToGroup(item, this.group);
Items.Insert(index, item);
return item;
}
private void MoveToGroup(ListViewItem item, ListViewGroup newGroup) {
ListViewGroup oldGroup = item.Group;
if (oldGroup != newGroup) {
item.group = newGroup;
if (oldGroup != null) {
oldGroup.Items.Remove(item);
}
UpdateNativeListViewItem(item);
}
}
public void Remove(ListViewItem item)
{
Items.Remove(item);
if (item.group == this.group) {
item.group = null;
UpdateNativeListViewItem(item);
}
}
public void RemoveAt(int index) {
Remove(this[index]);
}
private void UpdateNativeListViewItem(ListViewItem item) {
if (item.ListView != null && item.ListView.IsHandleCreated && !item.ListView.InsertingItemsNatively) {
item.UpdateStateToListView(item.Index);
}
}
}
}
|