private void UpdateFilteredSource()
{
FilteredSource = Source?.Where(x =>
{
// 選択済みのアイテムは選択肢に出さない
if (SelectedItems?.Contains(x) ?? false)
{
return(false);
}
var filterText = editableTextBox?.Text;
if (string.IsNullOrEmpty(filterText))
{
return(true);
}
if (x is string str)
{
return(str.Contains(filterText));
}
// リフレクションを用いて、DisplayMemberPathで指定されたプロパティ
// と比較を行う。DislayMemberPathがないなら、
// ToStringした結果と比較を行う
if (!string.IsNullOrWhiteSpace(DisplayMemberPath))
{
displayMemberPropertyInfo = displayMemberPropertyInfo ?? x.GetType().GetProperty(DisplayMemberPath);
var value = displayMemberPropertyInfo.GetValue(x);
return(value?.ToString().Contains(filterText) ?? false);
}
return(x?.ToString().Contains(filterText) ?? false);
}) ?? Enumerable.Empty <object>();
if (FilteredSource.Any())
{
SetCurrentValue(SelectedItemProperty, !string.IsNullOrWhiteSpace(editableTextBox.Text)
? FilteredSource.FirstOrDefault()
: null);
}
}
private Task ToggleRow(SelectedItem item, bool force = false)
{
if (!IsDisabled)
{
if (SelectedItems.Contains(item))
{
SelectedItems.Remove(item);
}
else
{
SelectedItems.Add(item);
}
SetValue();
if (Min > 0 || Max > 0)
{
var validationContext = new ValidationContext(Value !)
{
MemberName = FieldIdentifier?.FieldName
};
var validationResults = new List <ValidationResult>();
ValidateProperty(SelectedItems.Count, validationContext, validationResults);
ToggleMessage(validationResults, true);
}
_ = TriggerSelectedItemChanged();
if (force)
{
StateHasChanged();
}
}
return(Task.CompletedTask);
}
private void Selection_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (!_LockSelectionUpdates)
{
_LockSelectionUpdates = true;
if (e.Action == NotifyCollectionChangedAction.Reset)
{
SelectedItems.Clear();
}
if (e.OldItems != null)
{
if (e.OldItems.Count == SelectedItems.Count)
{
SelectedItems.Clear();
}
else
{
foreach (var item in e.OldItems)
{
SelectedItems.Remove(item);
}
}
}
if (e.NewItems != null)
{
foreach (var item in e.NewItems)
{
if (!SelectedItems.Contains(item))
{
SelectedItems.Add(item);
}
}
}
_LockSelectionUpdates = false;
}
}
protected void OnInnerStatusChanged(Status status, TModel model)
{
if (SelectedItems == null)
{
return;
}
if (status == Status.Checked)
{
lock (SelectedItems)
{
if (!SelectedItems.Contains(model))
{
SelectedItems.Add(model);
}
}
}
else if (status == Status.UnChecked)
{
lock (SelectedItems)
{
SelectedItems.Remove(model);
}
}
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowIndex > -1 && this.SelectedItems != null)
{
CheckBox cbx = (CheckBox)e.Row.FindControl("cbItem");
int i = e.Row.RowIndex;
string id = string.Format("{0}${1}${2}${3}${4}${5}",
this.GridView1.DataKeys[i].Values[0].ToString(),
this.GridView1.DataKeys[i].Values[1].ToString(),
this.GridView1.DataKeys[i].Values[2].ToString(),
this.GridView1.DataKeys[i].Values[3].ToString(),
this.GridView1.DataKeys[i].Values[4].ToString(),
this.GridView1.DataKeys[i].Values[5].ToString()
);
if (SelectedItems.Contains(id))
{
cbx.Checked = true;
}
else
{
cbx.Checked = false;
}
}
}
public void SelectItem(ExTreeViewItem item)
{
FocusItem(item);
if (!CtrlPressed)
{
SelectedItems.Clear();
}
if (ShiftPressed)
{
if (shiftEnd != null) //Erase previous selection of shift
{
foreach (var forEachItem in GetItemsBetween(shiftStart, shiftEnd))
{
SelectedItems.Remove(forEachItem.DataContext);
}
}
shiftEnd = item;
foreach (var forEachItem in GetItemsBetween(shiftStart, shiftEnd))
{
SelectedItems.Add(forEachItem.DataContext);
}
}
else
{
shiftEnd = null;
shiftStart = item;
if (CtrlPressed && SelectedItems.Contains(item.DataContext))
{
SelectedItems.Remove(item.DataContext);
}
else
{
SelectedItems.Add(item.DataContext);
}
}
}
private void NewSelection(T selectedItem)
{
if (multiModifierDown)
{
if (SelectedItems.Add(selectedItem))
{
Selection?.Invoke(this, new ItemSelectionEventArgs <T>(selectedItem, SelectionType.Selected));
}
}
else
{
bool alreadySelected = SelectedItems.Contains(selectedItem);
var toRemove = SelectedItems.Except(selectedItem).ToArray();
foreach (var b in toRemove)
{
Deselect(b);
}
if (!alreadySelected)
{
SelectedItems.Add(selectedItem);
Selection?.Invoke(this, new ItemSelectionEventArgs <T>(selectedItem, SelectionType.Selected));
}
}
}
/// <summary>
/// Utillity method setting the selected value of the current treeViewItem and
/// adding and remove it from the selected items collection respectively.
/// </summary>
/// <param name="item">
/// The item whoes IsSelected property value defines what is about to happen
/// to the the current item.
/// </param>
/// <param name="itemState">
/// The value to set to the IsSelected property of the current treeviewitem.
/// </param>
private void SelectItem(TreeViewItem item, bool itemState)
{
if (item == null)
{
return;
}
if (SelectedItems != null)
{
if (itemState == true)
{
item.IsSelected = itemState;
if (!SelectedItems.Contains(item))
{
SelectedItems.Add(item);
}
}
else
{
item.IsSelected = itemState;
SelectedItems.Remove(item);
}
}
}
public void SelectItems(Func <object, bool> predicate)
{
if (SelectionMode == SelectionMode.Single)
{
throw new InvalidOperationException("SelectionMode must not be Single");
}
foreach (var item in Items)
{
var selected = predicate(item);
if (selected != SelectedItems.Contains(item))
{
if (selected)
{
SelectedItems.Add(item);
}
else
{
SelectedItems.Remove(item);
}
}
}
}
private void UpdateFromSelectedMemberPathValues()
{
_ignoreSelectedItemsCollectionChanged++;
foreach (object item in ItemsCollection)
{
bool?selectedMemberPathValue = GetSelectedMemberPathValue(item);
if (selectedMemberPathValue.HasValue)
{
if (selectedMemberPathValue.Value)
{
if (!SelectedItems.Contains(item))
{
SelectedItems.Add(item);
}
}
else if (SelectedItems.Contains(item))
{
SelectedItems.Remove(item);
}
}
}
_ignoreSelectedItemsCollectionChanged--;
UpdateFromSelectedItems();
}
/// <summary>
/// Called when the <see cref="SelectedItems"/> CollectionChanged event is raised.
/// </summary>
/// <param name="sender">The event sender.</param>
/// <param name="e">The event args.</param>
private void SelectedItemsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (_syncingSelectedItems)
{
return;
}
void Add(IList newItems, IList addedItems = null)
{
foreach (var item in newItems)
{
var index = MarkItemSelected(item, true);
if (index != -1 && _selection.Add(index) && addedItems != null)
{
addedItems.Add(item);
}
}
}
void UpdateSelection()
{
if ((SelectedIndex != -1 && !_selection.Contains(SelectedIndex)) ||
(SelectedIndex == -1 && _selection.HasItems))
{
_selectedIndex = _selection.First();
_selectedItem = ElementAt(Items, _selectedIndex);
RaisePropertyChanged(SelectedIndexProperty, -1, _selectedIndex, BindingPriority.LocalValue);
RaisePropertyChanged(SelectedItemProperty, null, _selectedItem, BindingPriority.LocalValue);
}
}
IList added = null;
IList removed = null;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
Add(e.NewItems);
UpdateSelection();
added = e.NewItems;
}
break;
case NotifyCollectionChangedAction.Remove:
if (SelectedItems.Count == 0)
{
SelectedIndex = -1;
}
foreach (var item in e.OldItems)
{
var index = MarkItemSelected(item, false);
_selection.Remove(index);
}
removed = e.OldItems;
break;
case NotifyCollectionChangedAction.Replace:
throw new NotSupportedException("Replacing items in a SelectedItems collection is not supported.");
case NotifyCollectionChangedAction.Move:
throw new NotSupportedException("Moving items in a SelectedItems collection is not supported.");
case NotifyCollectionChangedAction.Reset:
{
removed = new List <object>();
added = new List <object>();
foreach (var index in _selection.ToList())
{
var item = ElementAt(Items, index);
if (!SelectedItems.Contains(item))
{
MarkItemSelected(index, false);
removed.Add(item);
_selection.Remove(index);
}
}
Add(SelectedItems, added);
UpdateSelection();
}
break;
}
if (added?.Count > 0 || removed?.Count > 0)
{
var changed = new SelectionChangedEventArgs(
SelectionChangedEvent,
added ?? Empty,
removed ?? Empty);
RaiseEvent(changed);
}
}
private void LoadTemplates([NotNull] IEnumerable <TemplateHeader> templates)
{
Debug.ArgumentNotNull(templates, nameof(templates));
Templates = templates.Select(t => new CheckedTemplateHeader(t.TemplateUri, t.Name, t.Icon, t.Path, t.Section, t.IsBranch, SelectedItems.Contains(t.TemplateUri.ItemId))).ToList();
TemplateListView.ItemsSource = Templates;
listViewSorter.Resort();
view = CollectionViewSource.GetDefaultView(Templates) as CollectionView;
if (view == null)
{
return;
}
var groupDescription = new PropertyGroupDescription("Section")
{
StringComparison = StringComparison.InvariantCultureIgnoreCase
};
var collection = view.GroupDescriptions;
if (collection != null)
{
collection.Clear();
collection.Add(groupDescription);
}
view.Filter = delegate(object o)
{
var templateHeader = o as TemplateHeader;
return(templateHeader != null && templateHeader.Name.IsFilterMatch(TemplateSelectorFilter.Text));
};
view.Refresh();
TemplateListView.ResizeColumn(NameColumn);
Loading.Visibility = Visibility.Collapsed;
TemplateListView.Visibility = Visibility.Visible;
var loaded = TemplatesLoaded;
if (loaded != null)
{
loaded(this, EventArgs.Empty);
}
}
private void DrawData(PaintEventArgs e, List <RollColumn> visibleColumns)
{
if (QueryItemText != null)
{
if (HorizontalOrientation)
{
int startRow = FirstVisibleRow;
int range = Math.Min(LastVisibleRow, RowCount - 1) - startRow + 1;
Gdi.PrepDrawString(NormalFont, _foreColor);
for (int i = 0, f = 0; f < range; i++, f++)
{
f += lagFrames[i];
int LastVisible = LastVisibleColumnIndex;
for (int j = FirstVisibleColumn; j <= LastVisible; j++)
{
Bitmap image = null;
int x = 0;
int y = 0;
int bitmapOffsetX = 0;
int bitmapOffsetY = 0;
if (QueryItemIcon != null)
{
QueryItemIcon(f + startRow, visibleColumns[j], ref image, ref bitmapOffsetX, ref bitmapOffsetY);
}
if (image != null)
{
x = RowsToPixels(i) + CellWidthPadding + bitmapOffsetX;
y = (j * CellHeight) + (CellHeightPadding * 2) + bitmapOffsetY;
Gdi.DrawBitmap(image, new Point(x, y), true);
}
string text;
int strOffsetX = 0;
int strOffsetY = 0;
QueryItemText(f + startRow, visibleColumns[j], out text, ref strOffsetX, ref strOffsetY);
// Center Text
x = RowsToPixels(i) + (CellWidth - text.Length * _charSize.Width) / 2;
y = (j * CellHeight) + CellHeightPadding - VBar.Value;
var point = new Point(x + strOffsetX, y + strOffsetY);
var rePrep = false;
if (j == 1)
{
if (SelectedItems.Contains(new Cell {
Column = visibleColumns[j], RowIndex = i + startRow
}))
{
Gdi.PrepDrawString(RotatedFont, SystemColors.HighlightText);
rePrep = true;
}
else if (j == 1)
{
//1. not sure about this; 2. repreps may be excess, but if we render one column at a time, we do need to change back after rendering the header
rePrep = true;
Gdi.PrepDrawString(RotatedFont, _foreColor);
}
}
if (!string.IsNullOrWhiteSpace(text))
{
Gdi.DrawString(text, point);
}
if (rePrep)
{
Gdi.PrepDrawString(NormalFont, _foreColor);
}
}
}
}
else
{
int startRow = FirstVisibleRow;
int range = Math.Min(LastVisibleRow, RowCount - 1) - startRow + 1;
Gdi.PrepDrawString(NormalFont, _foreColor);
int xPadding = CellWidthPadding + 1 - HBar.Value;
for (int i = 0, f = 0; f < range; i++, f++) // Vertical
{
f += lagFrames[i];
int LastVisible = LastVisibleColumnIndex;
for (int j = FirstVisibleColumn; j <= LastVisible; j++) // Horizontal
{
RollColumn col = visibleColumns[j];
string text;
int strOffsetX = 0;
int strOffsetY = 0;
Point point = new Point(col.Left.Value + xPadding, RowsToPixels(i) + CellHeightPadding);
Bitmap image = null;
int bitmapOffsetX = 0;
int bitmapOffsetY = 0;
if (QueryItemIcon != null)
{
QueryItemIcon(f + startRow, visibleColumns[j], ref image, ref bitmapOffsetX, ref bitmapOffsetY);
}
if (image != null)
{
Gdi.DrawBitmap(image, new Point(point.X + bitmapOffsetX, point.Y + bitmapOffsetY + CellHeightPadding), true);
}
QueryItemText(f + startRow, visibleColumns[j], out text, ref strOffsetX, ref strOffsetY);
bool rePrep = false;
if (SelectedItems.Contains(new Cell {
Column = visibleColumns[j], RowIndex = f + startRow
}))
{
Gdi.PrepDrawString(NormalFont, SystemColors.HighlightText);
rePrep = true;
}
if (!string.IsNullOrWhiteSpace(text))
{
Gdi.DrawString(text, new Point(point.X + strOffsetX, point.Y + strOffsetY));
}
if (rePrep)
{
Gdi.PrepDrawString(NormalFont, _foreColor);
}
}
}
}
}
}
private bool GetCheckedState(SelectedItem item) => SelectedItems.Contains(item);
public void RenderGrid()
{
var stream = new ColloredStringBuilder();
SourceList.CollectionChanged -= SourceListOnCollectionChanged;
//For Native type Support we need to wrap the Type into a Anonymos one
if (ObserveList)
{
SourceList.CollectionChanged += SourceListOnCollectionChanged;
}
var size = 0;
var fod = SourceList.FirstOrDefault();
var length = SourceList.Count;
if (fod == null)
{
return;
}
Target = fod.GetType();
if (Target.IsPrimitive)
{
SourceList = new ObservableCollection <object>(SourceList.Select(s => new { s }));
Target = fod.GetType();
}
var props =
Target.GetProperties().Select(s =>
{
var name = s.Name;
if (RenderTypeName)
{
name = string.Format("{0} {{{1}}}", name, s.PropertyType.ToString());
}
var valueInformations = new ValueInformations()
{
GetValue = s.GetValue,
MaxContentSize = SourceList.Max(e =>
{
var value = s.GetValue(e);
if (value != null)
{
return(value.ToString().Length);
}
return(Null.ToString().Length);
}),
Name = name,
};
return(valueInformations);
}).ToList();
if (RenderRowNumber)
{
int fakeId = 0;
//fake new Column
props.Insert(0, new ValueInformations()
{
Name = "Nr",
MaxContentSize = length.ToString().Length,
GetValue = o => fakeId++
});
}
foreach (var valueInfo in props)
{
valueInfo.Name = AlignValueToSize(valueInfo.Name, valueInfo.MaxSize);
size += valueInfo.Name.Length;
}
var headerInfos = props.Select(s => s.Name).ToList();
this.ConsolePropertyGridStyle.RenderHeader(stream, headerInfos);
stream.AppendLine();
if (Console.WindowWidth < size)
{
Console.WindowWidth = size + 30;
}
for (int i = 0; i < length; i++)
{
var item = SourceList[i];
var selected = SelectedItems != null && SelectedItems.Contains(item);
var focused = FocusedItem == item;
this.ConsolePropertyGridStyle.BeginRenderProperty(stream, i, length.ToString().Length, selected, focused);
for (int index = 0; index < props.Count; index++)
{
var propertyInfo = props[index];
var value = propertyInfo.GetValue(item) ?? Null;
var norm = AlignValueToSize(value.ToString(), propertyInfo.MaxSize);
this.ConsolePropertyGridStyle.RenderNextProperty(stream, norm, index, selected, focused);
}
this.ConsolePropertyGridStyle.EndRenderProperty(stream, i, selected, focused);
stream.AppendLine();
}
this.ConsolePropertyGridStyle.RenderFooter(stream, headerInfos);
stream.AppendLine();
if (RenderSum)
{
this.ConsolePropertyGridStyle.RenderSummary(stream, length);
stream.AppendLine();
}
if (_extraInfos.Length > 0)
{
this.ConsolePropertyGridStyle.RenderAdditionalInfos(stream, _extraInfos);
stream.AppendLine();
}
if (!PersistendAdditionalInfos)
{
_extraInfos.Clear();
}
if (ClearConsole)
{
Console.Clear();
}
stream.Render();
}
/// <summary>
/// Panel click. Handles item selection.
/// </summary>
private void OnPanelClick(object sender, MouseEventArgs e)
{
// Is touch enabled?
if (M.TouchEnabled)
{
// Cancels click event if click wasn't accurate enough
// Ensures better scrolling experience
if (mouseDownPoint != e.Location)
{
return;
}
}
// Get focus
Focus();
// Do we have more than one item?
if (Items.Count > 0)
{
// Iterate over all displayed items
foreach (MItem item in DisplayedItems)
{
// Did user clicked on currently iterated item?
if (item.Bounds.Contains(mouseLocation))
{
// Modify mouse event arguments
MouseEventArgs clickArgs = new MouseEventArgs(
e.Button,
e.Clicks,
e.X,
Math.Abs(Panel.AutoScrollPosition.Y) + e.Y,
e.Delta
);
// Trigger clicked item click event
item.TriggerMouseClick(this, clickArgs);
// Did user left-clicked?
if (e.Button == MouseButtons.Left)
{
// Ignore if item is divider
if (item.Divider)
{
continue;
}
// Change selected item
if (MultiSelect)
{
// Is CTRL key pressed?
if ((ModifierKeys & Keys.Control) == Keys.Control)
{
// Check if item was not selected before
if (!SelectedItems.Contains(item))
{
// Add item to SelectedItems collection
SelectedItems.Add(item);
}
}
else
{
// Clear items
SelectedItems.Clear();
// Add item to SelectedItems collection
SelectedItems.Add(item);
}
}
else
{
// Update selected item
SelectedItem = item;
}
// Trigger selected item changed event
SelectedItemChanged?.Invoke(this, new PropertyChangedEventArgs("SelectedItemChanged"));
}
}
}
}
// Redraw
Invalidate(true);
}
void HandleOwnerSelectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
// When 'Updating' is false it means the user has directly modified the collection
// by calling ListBox.SelectedItems.[Add|Remove]. In this case we need to ensure we
// don't have a duplicate selection.
if (!Updating)
{
if (Mode == SelectionMode.Single)
{
throw new InvalidOperationException("SelectedItems cannot be modified directly when in Single select mode");
}
try {
Updating = true;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
if (!SelectedItems.Contains(e.NewItems [0]))
{
AddToSelected(e.NewItems [0]);
}
break;
case NotifyCollectionChangedAction.Remove:
if (SelectedItems.Contains(e.OldItems [0]))
{
RemoveFromSelected(e.OldItems [0]);
}
break;
case NotifyCollectionChangedAction.Replace:
if (SelectedItems.Contains(e.OldItems [0]))
{
RemoveFromSelected(e.OldItems [0]);
}
if (!SelectedItems.Contains(e.NewItems [0]))
{
AddToSelected(e.NewItems [0]);
}
break;
case NotifyCollectionChangedAction.Reset:
foreach (var v in SelectedItems.Where(o => !Owner.SelectedItems.Contains(o)).ToArray())
{
if (SelectedItems.Contains(v))
{
RemoveFromSelected(v);
}
}
foreach (var v in Owner.SelectedItems.Where(o => !SelectedItems.Contains(o)).ToArray())
{
if (!SelectedItems.Contains(v))
{
AddToSelected(v);
}
}
break;
}
Owner.SelectedItemsIsInvalid = true;
} finally {
Updating = false;
}
}
}
public void Select(object item, bool ignoreSelectedValue)
{
// Ignore any Select requests for items which aren't in the owners Items list
if (!Owner.Items.Contains(item))
{
return;
}
bool selected = SelectedItems.Contains(item);
try {
Updating = true;
switch (Mode)
{
case SelectionMode.Single:
// When in single select mode we unselect the item if the Control key is held,
// otherwise we just ensure that the SelectedIndex is in sync. It could be out
// of sync if the user inserts an item before the current selected item.
if (selected)
{
if (ModifierKeys.Control == (Keyboard.Modifiers & ModifierKeys.Control))
{
ClearSelection(ignoreSelectedValue);
}
else
{
UpdateSelectorProperties(SelectedItem, Owner.Items.IndexOf(SelectedItem), Owner.SelectedValue);
}
}
else
{
ReplaceSelection(item);
}
break;
case SelectionMode.Extended:
if ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)
{
int selectedIndex = Owner.Items.IndexOf(SelectedItem);
if (SelectedItems.Count == 0)
{
SelectRange(0, Owner.Items.IndexOf(item));
}
else
{
SelectRange(selectedIndex, Owner.Items.IndexOf(item));
}
}
else if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
if (!selected)
{
AddToSelected(item);
}
}
else
{
if (selected)
{
RemoveFromSelected(item);
}
else
{
AddToSelected(item);
}
}
break;
case SelectionMode.Multiple:
if (SelectedItems.Contains(item))
{
UpdateSelectorProperties(SelectedItem, Owner.Items.IndexOf(SelectedItem), Owner.SelectedValue);
}
else
{
AddToSelected(item);
}
break;
default:
throw new NotSupportedException(string.Format("SelectionMode {0} is not support", Mode));
}
} finally {
Updating = false;
}
}
protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
{
if (Initializing)
{
base.OnItemsChanged(e);
return;
}
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
ListBoxItem item = e.NewItems [0] as ListBoxItem;
if (item != null && item.IsSelected && !SelectedItems.Contains(item))
{
Selection.Select(item);
}
else if (SelectedItem != null)
{
// The index of our selected item may have changed, so we need to
// reselect it to refresh the SelectedIndex property. This won't raise
// a SelectionChanged event as the actual object is the same.
Selection.Select(SelectedItem);
}
break;
case NotifyCollectionChangedAction.Reset:
object o;
if (ItemsSource is ICollectionView && SynchronizeWithCurrentItem)
{
o = ((ICollectionView)ItemsSource).CurrentItem;
}
else
{
o = SelectedItem;
}
if (Items.Contains(o))
{
Selection.Select(o);
}
else
{
Selection.ClearSelection();
}
break;
case NotifyCollectionChangedAction.Remove:
if (SelectedItems.Contains(e.OldItems [0]))
{
Selection.Unselect(e.OldItems [0]);
}
else if (e.OldStartingIndex <= SelectedIndex)
{
Selection.Select(SelectedItem);
}
break;
case NotifyCollectionChangedAction.Replace:
Selection.Unselect(e.OldItems [0]);
break;
default:
throw new NotSupportedException(string.Format("Collection changed action '{0}' not supported", e.Action));
}
base.OnItemsChanged(e);
}
private bool ConvertSelected(StorageMedia media)
{
return(SelectedItems.Contains(media));
}
internal override void OnSelectedItemChanged(object oldSelectedItem, object selectedItem, bool updateItemSelectedState)
{
if (_modifyingSelectionInternally)
{
return;
}
if (IsSelectionMultiple)
{
var items = GetItems();
if (selectedItem == null || items.Contains(selectedItem))
{
object[] removedItems = null;
object[] addedItems = null;
try
{
_modifyingSelectionInternally = true;
removedItems = SelectedItems.Except(selectedItem).ToObjectArray();
var isRealSelection = selectedItem != null || items.Contains(null);
addedItems = SelectedItems.Contains(selectedItem) || !isRealSelection ? new object[0] : new[] { selectedItem };
SelectedItems.Clear();
if (isRealSelection)
{
SelectedItems.Add(selectedItem);
}
}
finally
{
_modifyingSelectionInternally = false;
}
//Invoke event after resetting flag, in case callbacks in user code modify the collection
if (addedItems.Length > 0 || removedItems.Length > 0)
{
InvokeSelectionChanged(removedItems, addedItems);
}
}
else
{
SelectedItem = oldSelectedItem;
}
}
else
{
try
{
_modifyingSelectionInternally = true;
if (selectedItem != null)
{
SelectedItems.Update(new[] { selectedItem });
}
else
{
SelectedItems.Clear();
}
}
finally
{
_modifyingSelectionInternally = false;
}
base.OnSelectedItemChanged(
oldSelectedItem: oldSelectedItem,
selectedItem: selectedItem,
updateItemSelectedState: true);
}
}
/// <summary> /// 获得 当前行是否被选中 /// </summary> /// <param name="item"></param> /// <returns></returns> protected CheckboxState RowCheckState(TItem item) => SelectedItems.Contains(item) ? CheckboxState.Checked : CheckboxState.UnChecked;
private void Handle(long chatId, long order)
{
if (_deletedChats.ContainsKey(chatId))
{
if (order == 0)
{
_deletedChats.Remove(chatId);
}
else
{
return;
}
}
var items = Items;
var chat = GetChat(chatId);
if (chat != null && _chatList.ListEquals(chat.ChatList))
{
if (items.Filter != null && !items.Filter.Intersects(chat))
{
BeginOnUIThread(() => items.Remove(chat));
return;
}
BeginOnUIThread(async() =>
{
if (order > items.LastOrder || (order == items.LastOrder && chatId >= items.LastChatId))
{
var index = items.IndexOf(chat);
var next = items.NextIndexOf(chat);
if (next >= 0 && index != next)
{
items.Remove(chat);
items.Insert(next, chat);
if (chat.Id == _selectedItem)
{
Delegate?.SetSelectedItem(chat);
}
if (SelectedItems.Contains(chat))
{
Delegate?.SetSelectedItems(_selectedItems);
}
}
}
else
{
items.Remove(chat);
if (chat.Id == _selectedItem)
{
Delegate?.SetSelectedItem(chat);
}
if (SelectedItems.Contains(chat))
{
SelectedItems.Remove(chat);
Delegate?.SetSelectedItems(_selectedItems);
}
if (!items.HasMoreItems)
{
await items.LoadMoreItemsAsync(0);
}
}
});
}
}
internal void OnPointerMoved(LazoListViewItem item, PointerRoutedEventArgs e)
{
var child = ItemFromContainer(item);
if (child == null)
{
return;
}
if ((_firstItem != null && _firstItem != child) || !_pressed || !e.Pointer.IsInContact || e.Pointer.PointerDeviceType != PointerDeviceType.Mouse)
{
return;
}
var point = e.GetCurrentPoint(item);
if (!point.Properties.IsLeftButtonPressed)
{
return;
}
e.Handled = true;
if (_firstItem == null)
{
_firstItem = ItemFromContainer(item);
_ranges = SelectedRanges.ToArray();
_operation = !item.IsSelected;
_position = point.Position;
}
else if (_firstItem == child)
{
var contains = SelectedItems.Contains(child);
var delta = Math.Abs(point.Position.Y - _position.Y);
if (delta > 10)
{
SelectionMode = ListViewSelectionMode.Multiple;
if (_operation && !contains)
{
SelectedItems.Add(child);
}
else if (!_operation && contains)
{
SelectedItems.Remove(child);
}
}
else
{
if (_operation && contains)
{
SelectedItems.Remove(child);
}
else if (!_operation && !contains)
{
SelectedItems.Add(child);
}
}
}
}
/// <summary>
/// Draw the window.
/// </summary>
protected virtual void OnGUI()
{
InitializeStyles();
if (!String.IsNullOrEmpty(Caption))
{
EditorGUILayout.BeginHorizontal();
EditorGUILayout.SelectableLabel(Caption);
EditorGUILayout.EndHorizontal();
EditorGUILayout.Space();
}
EditorGUILayout.BeginVertical();
scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);
int displayIndex = 0;
foreach (var indexAndItem in sortedItems)
{
var item = indexAndItem.Value.Key;
var display = indexAndItem.Value.Value;
bool selected = SelectedItems.Contains(item);
EditorGUILayout.BeginHorizontal(
selected ? selectedItemStyles[displayIndex % selectedItemStyles.Length] :
unselectedItemStyles[displayIndex % unselectedItemStyles.Length]);
bool currentlySelected = EditorGUILayout.ToggleLeft(display, selected);
if (currentlySelected != selected)
{
if (currentlySelected)
{
SelectedItems.Add(item);
}
else
{
SelectedItems.Remove(item);
}
}
EditorGUILayout.EndHorizontal();
displayIndex++;
}
EditorGUILayout.EndScrollView();
EditorGUILayout.EndVertical();
EditorGUILayout.BeginHorizontal();
if (GUILayout.Button("All"))
{
SelectAll();
}
if (GUILayout.Button("None"))
{
SelectNone();
}
EditorGUILayout.Space();
EditorGUILayout.Space();
bool cancel = GUILayout.Button(CancelLabel);
bool apply = GUILayout.Button(ApplyLabel);
EditorGUILayout.EndHorizontal();
EditorGUILayout.Space();
if (cancel || apply)
{
if (cancel && OnCancel != null)
{
OnCancel();
}
if (apply && OnApply != null)
{
OnApply();
}
Close();
}
}
/// <summary>
/// Checks if an item is selected.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>True if selected; Otherwise, false.</returns>
public virtual bool IsSelected(object item)
{
return(SelectedItems.Contains(item));
}
/// <summary>
/// Provides different key shortcuts
/// </summary>
/// <param name="key"></param>
public void KeyDown(VirtualKey key)
{
switch (key)
{
case VirtualKey.Left:
NavigateBack.ExecuteWhen();
break;
case VirtualKey.Right:
NavigateForward.ExecuteWhen();
break;
case VirtualKey.Back:
NavigateBack.ExecuteWhen();
break;
case VirtualKey.F5:
Refresh();
break;
case VirtualKey.F2:
RenameStorageItemSelectedAsync();
break;
case VirtualKey.Delete:
DeleteStorageItemSelected();
break;
}
var ctrlDown = Window.Current.CoreWindow.GetKeyState(VirtualKey.Control).HasFlag(CoreVirtualKeyStates.Down);
if (!ctrlDown)
{
return;
}
switch (key)
{
case VirtualKey.R:
Refresh();
break;
case VirtualKey.C:
CopyStorageItemSelected();
break;
case VirtualKey.X:
CutStorageItemSelected();
break;
case VirtualKey.V:
PasteStorageItemSelected();
break;
case VirtualKey.A:
if (SelectedItems.Count == FileSystemElements.Count)
{
SelectedItems.Clear();
}
else
{
for (int i = 0; i < FileSystemElements.Count; i++)
{
if (!SelectedItems.Contains(FileSystemElements[i]))
{
SelectedItems.Add(FileSystemElements[i]);
}
}
}
break;
}
}
public bool IsItemSelected(Chat chat)
{
return(SelectedItems.Contains(chat));
}
/// <summary> /// 检查当前行是否被选中方法 /// </summary> /// <param name="val"></param> /// <returns></returns> protected virtual bool CheckActive(TItem val) => SelectedItems.Contains(val);
/// <summary>
/// Called when a page becomes the active page in a frame.
/// </summary>
/// <param name="e">An object that contains the event data.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (null == e)
{
throw new ArgumentNullException("e");
}
base.OnNavigatedTo(e);
// Restore Value if returning to application (to avoid inconsistent state)
if (State.ContainsKey(StateKey_Value))
{
State.Remove(StateKey_Value);
// Back out from picker page for consistency with behavior of core pickers in this scenario
if (NavigationService.CanGoBack)
{
NavigationService.GoBack();
return;
}
}
// Automatically uppercase the text for the header.
if (null != HeaderText)
{
HeaderTitle.Text = HeaderText.ToUpper(CultureInfo.CurrentCulture);
}
Picker.DataContext = Items;
Picker.SelectionMode = SelectionMode;
if (null != FullModeItemTemplate)
{
Picker.ItemTemplate = FullModeItemTemplate;
}
if (null != FullModeItemsPanel)
{
Picker.ItemsPanel = FullModeItemsPanel;
}
if (SelectionMode == SelectionMode.Single)
{
ApplicationBar.IsVisible = false;
Picker.SelectedItem = SelectedItem;
}
else
{
ApplicationBar.IsVisible = true;
Picker.ItemContainerStyle = (Style)Resources["ListBoxItemCheckedStyle"];
foreach (object item in Items)
{
if (null != SelectedItems && SelectedItems.Contains(item))
{
Picker.SelectedItems.Add(item);
}
}
}
}