public void RecreateCells()
{
LogicalChildren.Clear();
VisualChildren.Clear();
Cells = new CellsCollection(GridControl.Columns, AddCellAction, RemoveCellAction);
LogicalChildren.Add(ScrollBar);
VisualChildren.Add(ScrollBar);
//TODO recalculate with viewport
ScrollBar.Maximum = GridControl.Controller.Count;
void AddCellAction(Cell cell)
{
//cell.PointerReleased += CellOnPointerReleased;
LogicalChildren.Add(cell);
VisualChildren.Add(cell);
}
void RemoveCellAction(Cell cell)
{
//cell.PointerReleased -= CellOnPointerReleased;
LogicalChildren.Remove(cell);
VisualChildren.Remove(cell);
}
}
/// <summary>
/// Called when the <see cref="Children"/> collection changes.
/// </summary>
/// <param name="sender">The event sender.</param>
/// <param name="e">The event args.</param>
private void ChildrenChanged(object sender, NotifyCollectionChangedEventArgs e)
{
List <Control> controls;
// TODO: Handle Replace.
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
controls = e.NewItems.OfType <Control>().ToList();
SetLogicalParent(controls);
AddVisualChildren(e.NewItems.OfType <Visual>());
LogicalChildren.InsertRange(e.NewStartingIndex, controls);
break;
case NotifyCollectionChangedAction.Remove:
controls = e.OldItems.OfType <Control>().ToList();
ClearLogicalParent(e.OldItems.OfType <Control>());
LogicalChildren.RemoveAll(controls);
RemoveVisualChildren(e.OldItems.OfType <Visual>());
break;
case NotifyCollectionChangedAction.Reset:
controls = e.OldItems.OfType <Control>().ToList();
ClearLogicalParent(controls);
LogicalChildren.Clear();
ClearVisualChildren();
AddVisualChildren(_children);
break;
}
InvalidateMeasure();
}
/// <summary>
/// Called when the <see cref="Child"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ChildChanged(AvaloniaPropertyChangedEventArgs e)
{
LogicalChildren.Clear();
((ISetLogicalParent)e.OldValue)?.SetParent(null);
if (e.NewValue != null)
{
((ISetLogicalParent)e.NewValue).SetParent(this);
LogicalChildren.Add((ILogical)e.NewValue);
}
}
/// <summary>
/// Creates the <see cref="Panel"/>.
/// </summary>
private void CreatePanel()
{
Panel = ItemsPanel.Build();
Panel.SetValue(TemplatedParentProperty, TemplatedParent);
LogicalChildren.Clear();
VisualChildren.Clear();
LogicalChildren.Add(Panel);
VisualChildren.Add(Panel);
_createdPanel = true;
var task = MoveToPage(-1, SelectedIndex);
}
public void RecreateContent()
{
LogicalChildren.Clear();
VisualChildren.Clear();
GridBorderLines.Clear();
for (int i = 0; i < 4; i++)
{
var line = new Line()
{
Stroke = GridControl.BorderBrush, StrokeThickness = GridControl.BorderThickness
};
GridBorderLines.Add(line);
LogicalChildren.Add(line);
VisualChildren.Add(line);
}
ColumnHeaders.Clear();
ColumnHeaderLines.Clear();
for (int i = 0; i < GridControl.Columns.Count; i++)
{
GridControl.Columns[i].Index = i;
var columnHeader = GridControl.Columns[i].CreateColumnHeader();
ColumnHeaders.Add(columnHeader);
LogicalChildren.Add(columnHeader);
VisualChildren.Add(columnHeader);
var line = new Line()
{
Stroke = GridControl.VerticalLinesBrush, StrokeThickness = GridControl.VerticalLinesThickness
};
ColumnHeaderLines.Add(line);
LogicalChildren.Add(line);
VisualChildren.Add(line);
}
HorizontalHeaderLine = new Line()
{
Stroke = GridControl.HorizontalLinesBrush, StrokeThickness = GridControl.HorizontalLinesThickness
};
LogicalChildren.Add(HorizontalHeaderLine);
VisualChildren.Add(HorizontalHeaderLine);
CellsPanel.RecreateCells();
LogicalChildren.Add(CellsPanel);
VisualChildren.Add(CellsPanel);
}
/// <summary>
/// Called when the <see cref="Child"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ChildChanged(AvaloniaPropertyChangedEventArgs e)
{
var oldChild = (Control)e.OldValue;
var newChild = (Control)e.NewValue;
if (oldChild != null)
{
((ISetLogicalParent)oldChild).SetParent(null);
LogicalChildren.Clear();
VisualChildren.Remove(oldChild);
}
if (newChild != null)
{
((ISetLogicalParent)newChild).SetParent(this);
VisualChildren.Add(newChild);
LogicalChildren.Add(newChild);
}
}
/// <summary>
/// Creates the <see cref="Panel"/> when <see cref="ApplyTemplate"/> is called for the first
/// time.
/// </summary>
private void CreatePanel()
{
Panel = ItemsPanel.Build();
Panel.SetValue(TemplatedParentProperty, TemplatedParent);
LogicalChildren.Clear();
VisualChildren.Clear();
LogicalChildren.Add(Panel);
VisualChildren.Add(Panel);
_createdPanel = true;
if (!IsHosted && _itemsSubscription == null && Items is INotifyCollectionChanged incc)
{
_itemsSubscription = incc.WeakSubscribe(ItemsCollectionChanged);
}
PanelCreated(Panel);
}
private void ThumbChanged(AvaloniaPropertyChangedEventArgs e)
{
var oldThumb = (Thumb)e.OldValue;
var newThumb = (Thumb)e.NewValue;
if (oldThumb != null)
{
oldThumb.DragDelta -= ThumbDragged;
}
LogicalChildren.Clear();
VisualChildren.Clear();
if (newThumb != null)
{
newThumb.DragDelta += ThumbDragged;
LogicalChildren.Add(newThumb);
VisualChildren.Add(newThumb);
}
}
/// <summary>
/// Creates the <see cref="Panel"/> when <see cref="ApplyTemplate"/> is called for the first
/// time.
/// </summary>
protected virtual void CreatePanel()
{
Panel = ItemsPanel.Build();
Panel.SetValue(TemplatedParentProperty, TemplatedParent);
LogicalChildren.Clear();
VisualChildren.Clear();
LogicalChildren.Add(Panel);
VisualChildren.Add(Panel);
_createdPanel = true;
INotifyCollectionChanged incc = Items as INotifyCollectionChanged;
if (incc != null)
{
incc.CollectionChanged += ItemsCollectionChanged;
}
ItemsChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
/// <summary>
/// Called when the <see cref="Children"/> collection changes.
/// </summary>
/// <param name="sender">The event sender.</param>
/// <param name="e">The event args.</param>
private void ChildrenChanged(object sender, NotifyCollectionChangedEventArgs e)
{
List <Control> controls;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
controls = e.NewItems.OfType <Control>().ToList();
LogicalChildren.InsertRange(e.NewStartingIndex, controls);
VisualChildren.AddRange(e.NewItems.OfType <Visual>());
break;
case NotifyCollectionChangedAction.Remove:
controls = e.OldItems.OfType <Control>().ToList();
LogicalChildren.RemoveAll(controls);
VisualChildren.RemoveAll(e.OldItems.OfType <Visual>());
break;
case NotifyCollectionChangedAction.Replace:
for (var i = 0; i < e.OldItems.Count; ++i)
{
var index = i + e.OldStartingIndex;
var child = (IControl)e.NewItems[i];
LogicalChildren[index] = child;
VisualChildren[index] = child;
}
break;
case NotifyCollectionChangedAction.Reset:
controls = e.OldItems.OfType <Control>().ToList();
LogicalChildren.Clear();
VisualChildren.Clear();
VisualChildren.AddRange(_children);
break;
}
InvalidateMeasure();
}
/// <summary>
/// Creates the <see cref="Panel"/> when <see cref="ApplyTemplate"/> is called for the first
/// time.
/// </summary>
private void CreatePanel()
{
Panel = ItemsPanel.Build();
Panel.SetValue(TemplatedParentProperty, TemplatedParent);
if (!Panel.IsSet(KeyboardNavigation.DirectionalNavigationProperty))
{
KeyboardNavigation.SetDirectionalNavigation(
(InputElement)Panel,
KeyboardNavigationMode.Contained);
}
LogicalChildren.Clear();
VisualChildren.Clear();
LogicalChildren.Add(Panel);
VisualChildren.Add(Panel);
KeyboardNavigation.SetTabNavigation(
(InputElement)Panel,
KeyboardNavigation.GetTabNavigation(this));
_createdPanel = true;
CreateItemsAndListenForChanges(Items);
}