private void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.OldItems != null)
{
foreach (INotifyPropertyChanged item in e.OldItems)
{
_observedItems.Remove(item);
item.PropertyChanged -= ItemPropertyChanged;
}
}
if (e.NewItems != null)
{
foreach (INotifyPropertyChanged item in e.NewItems)
{
_observedItems.Add(item);
item.PropertyChanged += ItemPropertyChanged;
ItemChangedEventHandler handler2 = ItemChanged;
handler2?.Invoke(item, null);//e = {System.ComponentModel.PropertyChangedEventArgs}
}
}
NotifyCollectionChangedEventHandler handler = CollectionChanged;
handler?.Invoke(sender, e);
}
/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// itemchangedeventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this ItemChangedEventHandler itemchangedeventhandler, Object sender, ItemChangedEventArgs e, AsyncCallback callback)
{
if (itemchangedeventhandler == null)
{
throw new ArgumentNullException("itemchangedeventhandler");
}
return(itemchangedeventhandler.BeginInvoke(sender, e, callback, null));
}
void ItemPropertyChanged(object sender, PropertyChangedEventArgs e)
{
ItemChangedEventHandler handler = ItemChanged;
handler?.Invoke(sender, e);
if (CollectionResetIfItemChanged)
{
OnCollectionChanged(new System.Collections.Specialized.NotifyCollectionChangedEventArgs(System.Collections.Specialized.NotifyCollectionChangedAction.Reset));
}
}
public DataGrid()
{
base.SetStyle(ControlStyles.UserPaint, true);
base.SetStyle(ControlStyles.Opaque, false);
base.SetStyle(ControlStyles.SupportsTransparentBackColor, false);
base.SetStyle(ControlStyles.UserMouse, true);
this.gridState = new BitVector32(0x42827);
this.dataGridTables = new GridTableStylesCollection(this);
this.layout = this.CreateInitialLayoutState();
this.parentRows = new DataGridParentRows(this);
this.horizScrollBar.Top = base.ClientRectangle.Height - this.horizScrollBar.Height;
this.horizScrollBar.Left = 0;
this.horizScrollBar.Visible = false;
this.horizScrollBar.Scroll += new ScrollEventHandler(this.GridHScrolled);
base.Controls.Add(this.horizScrollBar);
this.vertScrollBar.Top = 0;
this.vertScrollBar.Left = base.ClientRectangle.Width - this.vertScrollBar.Width;
this.vertScrollBar.Visible = false;
this.vertScrollBar.Scroll += new ScrollEventHandler(this.GridVScrolled);
base.Controls.Add(this.vertScrollBar);
this.BackColor = DefaultBackBrush.Color;
this.ForeColor = DefaultForeBrush.Color;
this.borderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.currentChangedHandler = new EventHandler(this.DataSource_RowChanged);
this.positionChangedHandler = new EventHandler(this.DataSource_PositionChanged);
this.itemChangedHandler = new ItemChangedEventHandler(this.DataSource_ItemChanged);
this.metaDataChangedHandler = new EventHandler(this.DataSource_MetaDataChanged);
this.dataGridTableStylesCollectionChanged = new CollectionChangeEventHandler(this.TableStylesCollectionChanged);
this.dataGridTables.CollectionChanged += this.dataGridTableStylesCollectionChanged;
this.SetDataGridTable(this.defaultTableStyle, true);
this.backButtonHandler = new EventHandler(this.OnBackButtonClicked);
this.downButtonHandler = new EventHandler(this.OnShowParentDetailsButtonClicked);
this.caption = new DataGridCaption(this);
this.caption.BackwardClicked += this.backButtonHandler;
this.caption.DownClicked += this.downButtonHandler;
this.RecalculateFonts();
base.Size = new Size(130, 80);
base.Invalidate();
base.PerformLayout();
}
