/// <summary>
/// Creates the <see cref="Child"/> control from the <see cref="Content"/>.
/// </summary>
private void CreateChild()
{
var old = Child;
var content = Content;
var result = this.MaterializeDataTemplate(content);
if (old != null)
{
VisualChildren.Remove(old);
}
if (result != null)
{
if (!(content is IControl))
{
result.DataContext = content;
}
Child = result;
VisualChildren.Add(result);
}
else
{
Child = null;
}
_createdChild = true;
}
internal void SetVisualLines(ICollection <VisualLine> visualLines)
{
foreach (var v in _visuals)
{
if (v.VisualLine.IsDisposed)
{
VisualChildren.Remove(v);
}
}
_visuals.Clear();
foreach (var newLine in visualLines)
{
var visual = newLine.Render();
if (!visual.IsAdded)
{
VisualChildren.Add(visual);
visual.IsAdded = true;
}
_visuals.Add(visual);
}
InvalidateArrange();
}
/// <inheritdoc/>
protected override void OnUnload()
{
VisualChildren.Remove(_verticalScrollBar);
_verticalScrollBar = null;
base.OnUnload();
}
/// <inheritdoc/>
protected override void OnUnload()
{
VisualChildren.Remove(_thumb);
_thumb = null;
base.OnUnload();
}
/// <summary>
/// Updates the <see cref="Child"/> control based on the control's <see cref="Content"/>.
/// </summary>
/// <remarks>
/// Usually the <see cref="Child"/> control is created automatically when
/// <see cref="ApplyTemplate"/> is called; however for this to happen, the control needs to
/// be attached to a logical tree (if the control is not attached to the logical tree, it
/// is reasonable to expect that the DataTemplates needed for the child are not yet
/// available). This method forces the <see cref="Child"/> control's creation at any point,
/// and is particularly useful in unit tests.
/// </remarks>
public void UpdateChild()
{
var old = Child;
var content = Content;
var result = this.MaterializeDataTemplate(content);
if (old != null)
{
VisualChildren.Remove(old);
}
if (result != null)
{
if (!(content is IControl))
{
result.DataContext = content;
}
Child = result;
if (result.Parent == null)
{
((ISetLogicalParent)result).SetParent((ILogical)this.TemplatedParent ?? this);
}
VisualChildren.Add(result);
}
else
{
Child = null;
}
_createdChild = true;
}
/// <inheritdoc/>
protected override void OnUnload()
{
// Remove scroll bars.
if (_horizontalScrollBar != null)
{
var scrollBarValue = _horizontalScrollBar.Properties.Get<float>(RangeBase.ValuePropertyId);
var horizontalOffset = Properties.Get<float>(HorizontalOffsetPropertyId);
scrollBarValue.Changed -= horizontalOffset.Change;
horizontalOffset.Changed -= scrollBarValue.Change;
VisualChildren.Remove(_horizontalScrollBar);
_horizontalScrollBar = null;
}
if (_verticalScrollBar != null)
{
var scrollBarValue = _verticalScrollBar.Properties.Get<float>(RangeBase.ValuePropertyId);
var verticalOffset = Properties.Get<float>(VerticalOffsetPropertyId);
scrollBarValue.Changed -= verticalOffset.Change;
verticalOffset.Changed -= scrollBarValue.Change;
VisualChildren.Remove(_verticalScrollBar);
_verticalScrollBar = null;
}
base.OnUnload();
}
/// <summary>
/// Synchronizes the logical tree.
/// </summary>
/// <param name="e">The <see cref="System.Collections.Specialized.NotifyCollectionChangedEventArgs" /> instance containing the event data.</param>
private void SyncLogicalTree(NotifyCollectionChangedEventArgs e)
{
// In order to get DataContext and binding to work with the series, axes and annotations
// we add the items to the logical tree
if (e.NewItems != null)
{
foreach (var item in e.NewItems.OfType <ISetLogicalParent>())
{
item.SetParent(this);
}
LogicalChildren.AddRange(e.NewItems.OfType <ILogical>());
VisualChildren.AddRange(e.NewItems.OfType <IVisual>());
}
if (e.OldItems != null)
{
foreach (var item in e.OldItems.OfType <ISetLogicalParent>())
{
item.SetParent(null);
}
foreach (var item in e.OldItems)
{
LogicalChildren.Remove((ILogical)item);
VisualChildren.Remove((IVisual)item);
}
}
}
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);
}
}
/// <inheritdoc/>
protected override void OnUnload()
{
VisualChildren.Remove(_itemsPanel);
_itemsPanel.Children.Clear();
_itemsPanel = null;
base.OnUnload();
}
/// <summary>
/// Updates the <see cref="Child"/> control based on the control's <see cref="Content"/>.
/// </summary>
/// <remarks>
/// Usually the <see cref="Child"/> control is created automatically when
/// <see cref="ApplyTemplate"/> is called; however for this to happen, the control needs to
/// be attached to a logical tree (if the control is not attached to the logical tree, it
/// is reasonable to expect that the DataTemplates needed for the child are not yet
/// available). This method forces the <see cref="Child"/> control's creation at any point,
/// and is particularly useful in unit tests.
/// </remarks>
public void UpdateChild()
{
var content = Content;
var oldChild = Child;
var newChild = CreateChild();
// Remove the old child if we're not recycling it.
if (oldChild != null && newChild != oldChild)
{
VisualChildren.Remove(oldChild);
}
// Set the DataContext if the data isn't a control.
if (!(content is IControl))
{
DataContext = content;
}
else
{
ClearValue(DataContextProperty);
}
// Update the Child.
if (newChild == null)
{
Child = null;
}
else if (newChild != oldChild)
{
((ISetInheritanceParent)newChild).SetParent(this);
Child = newChild;
if (oldChild?.Parent == this)
{
LogicalChildren.Remove(oldChild);
}
if (newChild.Parent == null)
{
var templatedLogicalParent = TemplatedParent as ILogical;
if (templatedLogicalParent != null)
{
((ISetLogicalParent)newChild).SetParent(templatedLogicalParent);
}
else
{
LogicalChildren.Add(newChild);
}
}
VisualChildren.Add(newChild);
}
_createdChild = true;
}
public void RemoveVisualControl(DesignerControl dc)
{
if (VisualChildren.Contains(dc))
{
VisualChildren.Remove(dc);
}
else
{
return;
}
}
/// <inheritdoc/>
protected override void OnUnload()
{
// Clean up and remove controls for icon, title and close button.
if (_icon != null)
{
var icon = Properties.Get<Texture2D>(IconPropertyId);
var imageTexture = _icon.Properties.Get<Texture2D>(Image.TexturePropertyId);
icon.Changed -= imageTexture.Change;
var iconSourceRectangle = Properties.Get<Rectangle?>(IconSourceRectanglePropertyId);
var imageSourceRectangle = _icon.Properties.Get<Rectangle?>(Image.SourceRectanglePropertyId);
iconSourceRectangle.Changed -= imageSourceRectangle.Change;
#else
var iconSourceRectangle = Properties.Get<Rectangle>(IconSourceRectanglePropertyId);
var imageSourceRectangle = _icon.Properties.Get<Rectangle>(Image.SourceRectanglePropertyId);
iconSourceRectangle.Changed -= imageSourceRectangle.Change;
VisualChildren.Remove(_icon);
_icon = null;
}
if (_caption != null)
{
var title = Properties.Get<string>(TitlePropertyId);
var captionText = _caption.Properties.Get<string>(TextBlock.TextPropertyId);
title.Changed -= captionText.Change;
VisualChildren.Remove(_caption);
_caption = null;
}
if (_closeButton != null)
{
_closeButton.Click -= OnCloseButtonClick;
VisualChildren.Remove(_closeButton);
_closeButton = null;
}
if (_setSpecialCursor && UIService != null)
{
UIService.Cursor = null;
_setSpecialCursor = false;
}
Owner = null;
IsActive = false;
base.OnUnload();
}
protected override void OnVisualChildrenChanged(DependencyObject visualAdded, DependencyObject visualRemoved)
{
if (visualAdded is Visual)
{
VisualChildren.Add(visualAdded as Visual);
}
if (visualRemoved is Visual)
{
VisualChildren.Remove(visualRemoved as Visual);
}
base.OnVisualChildrenChanged(visualAdded, visualRemoved);
}
/// <inheritdoc/>
protected override void OnUnload()
{
if (_titleTextBlock != null)
{
// Disconnect Title and TextBlock.Text.
var title = Properties.Get <string>(TitlePropertyId);
var text = _titleTextBlock.Properties.Get <string>(TextBlock.TextPropertyId);
title.Changed -= text.Change;
VisualChildren.Remove(_titleTextBlock);
_titleTextBlock = null;
}
base.OnUnload();
}
/// <summary>
/// Updates the <see cref="Child"/> control based on the control's <see cref="Content"/>.
/// </summary>
/// <remarks>
/// Usually the <see cref="Child"/> control is created automatically when
/// <see cref="ApplyTemplate"/> is called; however for this to happen, the control needs to
/// be attached to a logical tree (if the control is not attached to the logical tree, it
/// is reasonable to expect that the DataTemplates needed for the child are not yet
/// available). This method forces the <see cref="Child"/> control's creation at any point,
/// and is particularly useful in unit tests.
/// </remarks>
public void UpdateChild()
{
var content = Content;
var oldChild = Child;
var newChild = CreateChild();
var logicalChildren = Host?.LogicalChildren ?? LogicalChildren;
// Remove the old child if we're not recycling it.
if (newChild != oldChild)
{
if (oldChild != null)
{
VisualChildren.Remove(oldChild);
logicalChildren.Remove(oldChild);
((ISetInheritanceParent)oldChild).SetParent(oldChild.Parent);
}
}
// Set the DataContext if the data isn't a control.
if (!(content is IControl))
{
DataContext = content;
}
else
{
ClearValue(DataContextProperty);
}
// Update the Child.
if (newChild == null)
{
Child = null;
}
else if (newChild != oldChild)
{
((ISetInheritanceParent)newChild).SetParent(this);
Child = newChild;
if (!logicalChildren.Contains(newChild))
{
logicalChildren.Add(newChild);
}
VisualChildren.Add(newChild);
}
_createdChild = true;
}
private void ButtonChanged(AvaloniaPropertyChangedEventArgs e)
{
var oldButton = (Button)e.OldValue;
var newButton = (Button)e.NewValue;
if (oldButton != null)
{
LogicalChildren.Remove(oldButton);
VisualChildren.Remove(oldButton);
}
if (newButton != null)
{
LogicalChildren.Add(newButton);
VisualChildren.Add(newButton);
}
}
/// <summary>
/// Called when the <see cref="Content"/> property changes.
/// </summary>
/// <param name="e">The event args.</param>
private void ContentChanged(AvaloniaPropertyChangedEventArgs e)
{
_createdChild = false;
if (((ILogical)this).IsAttachedToLogicalTree)
{
UpdateChild();
}
else if (Child != null)
{
VisualChildren.Remove(Child);
LogicalChildren.Remove(Child);
Child = null;
_dataTemplate = null;
}
InvalidateMeasure();
}
/// <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);
}
}
//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
private void OnChildrenChanged(object sender, CollectionChangedEventArgs <UIControl> eventArgs)
{
// Children are also stuffed into the VisualChildren. Both collections should use
// the same order.
// Handle moved items.
if (eventArgs.Action == CollectionChangedAction.Move)
{
// Move visual children too.
VisualChildren.Move(eventArgs.OldItemsIndex, eventArgs.NewItemsIndex);
return;
}
// Handle removed items.
foreach (var oldItem in eventArgs.OldItems)
{
VisualChildren.Remove(oldItem);
}
// Handle new items.
int newItemsIndex = eventArgs.NewItemsIndex;
if (newItemsIndex == -1)
{
// Append items.
foreach (var newItem in eventArgs.NewItems)
{
VisualChildren.Add(newItem);
}
}
else
{
// Make sure that the same order is used in both collections.
foreach (var newItem in eventArgs.NewItems)
{
VisualChildren.Insert(newItemsIndex, newItem);
newItemsIndex++;
}
}
InvalidateMeasure();
}
/// <summary>
/// Called when the <see cref="Content"/> was exchanged.
/// </summary>
/// <param name="newContent">The new content.</param>
/// <param name="oldContent">The old content.</param>
protected virtual void OnContentChanged(UIControl newContent, UIControl oldContent)
{
if (oldContent != null)
{
VisualChildren.Remove(oldContent);
}
if (newContent != null)
{
// Apply ContentStyle to Content.
if (IsLoaded && !string.IsNullOrEmpty(ContentStyle))
{
newContent.Style = ContentStyle;
}
VisualChildren.Add(newContent);
}
InvalidateMeasure();
}
private void ThumbChanged(AvaloniaPropertyChangedEventArgs e)
{
var oldThumb = (Thumb)e.OldValue;
var newThumb = (Thumb)e.NewValue;
if (oldThumb != null)
{
oldThumb.DragDelta -= ThumbDragged;
LogicalChildren.Remove(oldThumb);
VisualChildren.Remove(oldThumb);
}
if (newThumb != null)
{
newThumb.DragDelta += ThumbDragged;
LogicalChildren.Add(newThumb);
VisualChildren.Add(newThumb);
}
}
/// <inheritdoc/>
protected override void OnUnload()
{
// Remove thumb and buttons.
VisualChildren.Remove(_thumb);
_thumb = null;
if (_decrementButton != null)
{
var click = _decrementButton.Events.Get <EventArgs>(ButtonBase.ClickEventId);
click.Event -= OnDecrementButtonClick;
VisualChildren.Remove(_decrementButton);
_decrementButton = null;
}
if (_incrementButton != null)
{
var click = _incrementButton.Events.Get <EventArgs>(ButtonBase.ClickEventId);
click.Event += OnIncrementButtonClick;
VisualChildren.Remove(_incrementButton);
_incrementButton = null;
}
base.OnUnload();
}
/// <summary>
/// Updates the <see cref="Child"/> control based on the control's <see cref="Content"/>.
/// </summary>
/// <remarks>
/// Usually the <see cref="Child"/> control is created automatically when
/// <see cref="ApplyTemplate"/> is called; however for this to happen, the control needs to
/// be attached to a logical tree (if the control is not attached to the logical tree, it
/// is reasonable to expect that the DataTemplates needed for the child are not yet
/// available). This method forces the <see cref="Child"/> control's creation at any point,
/// and is particularly useful in unit tests.
/// </remarks>
public void UpdateChild()
{
var content = Content;
var oldChild = Child;
var newChild = content as IControl;
if (content != null && newChild == null)
{
// We have content and it isn't a control, so first try to recycle the existing
// child control to display the new data by querying if the template that created
// the child can recycle items and that it also matches the new data.
if (oldChild != null &&
_dataTemplate != null &&
_dataTemplate.SupportsRecycling &&
_dataTemplate.Match(content))
{
newChild = oldChild;
}
else
{
// We couldn't recycle an existing control so find a data template for the data
// and use it to create a control.
_dataTemplate = this.FindDataTemplate(content, ContentTemplate) ?? FuncDataTemplate.Default;
newChild = _dataTemplate.Build(content);
// Try to give the new control its own name scope.
var controlResult = newChild as Control;
if (controlResult != null)
{
NameScope.SetNameScope(controlResult, new NameScope());
}
}
}
else
{
_dataTemplate = null;
}
// Remove the old child if we're not recycling it.
if (oldChild != null && newChild != oldChild)
{
VisualChildren.Remove(oldChild);
}
// Set the DataContext if the data isn't a control.
if (!(content is IControl))
{
DataContext = content;
}
// Update the Child.
if (newChild == null)
{
Child = null;
}
else if (newChild != oldChild)
{
((ISetInheritanceParent)newChild).SetParent(this);
Child = newChild;
if (oldChild?.Parent == this)
{
LogicalChildren.Remove(oldChild);
}
if (newChild.Parent == null)
{
var templatedLogicalParent = TemplatedParent as ILogical;
if (templatedLogicalParent != null)
{
((ISetLogicalParent)newChild).SetParent(templatedLogicalParent);
}
else
{
LogicalChildren.Add(newChild);
}
}
VisualChildren.Add(newChild);
}
_createdChild = true;
}
internal void RemoveChild(IVisual visual)
{
VisualChildren.Remove(visual);
}
public void RemoveChild(Visual v)
{
VisualChildren.Remove(v);
}
protected override Size ArrangeOverride(Size finalSize)
{
int firstRow = Cells.GetInitialRow();
foreach (var cell in Cells.GetVisibleCells())
{
double width = AccumulatedColumnWidths[cell.Column.Index + 1] -
AccumulatedColumnWidths[cell.Column.Index] - GridControl.VerticalLinesThickness;
cell.Arrange(new Rect(AccumulatedColumnWidths[cell.Column.Index],
AccumulatedRowHeights[cell.Row - firstRow],
width, cell.DesiredSize.Height));
}
UpdateGridLines();
ScrollBar.Arrange(new Rect(finalSize.Width - ScrollBar.Width, 0.0, ScrollBar.Width, finalSize.Height));
return(finalSize);
void UpdateGridLines()
{
int lastAccumulatedColumnWidthsIndex = AccumulatedColumnWidths.Count - 1;
while (ColumnLines.Count > lastAccumulatedColumnWidthsIndex)
{
var columnLine = ColumnLines[ColumnLines.Count - 1];
ColumnLines.Remove(columnLine);
LogicalChildren.Remove(columnLine);
VisualChildren.Remove(columnLine);
}
while (lastAccumulatedColumnWidthsIndex > ColumnLines.Count)
{
Line columnLine = new Line();
columnLine.Stroke = GridControl.VerticalLinesBrush;
columnLine.StrokeThickness = GridControl.VerticalLinesThickness;
ColumnLines.Add(columnLine);
LogicalChildren.Add(columnLine);
VisualChildren.Add(columnLine);
}
int lastAccumulatedRowHeightsIndex = AccumulatedRowHeights.Count(rh => !Double.IsNaN(rh)) - 1;
while (RowLines.Count > lastAccumulatedRowHeightsIndex)
{
var rowLine = RowLines[RowLines.Count - 1];
RowLines.Remove(rowLine);
LogicalChildren.Remove(rowLine);
VisualChildren.Remove(rowLine);
}
while (lastAccumulatedRowHeightsIndex > RowLines.Count)
{
Line rowLine = new Line();
rowLine.Stroke = GridControl.HorizontalLinesBrush;
rowLine.StrokeThickness = GridControl.HorizontalLinesThickness;
RowLines.Add(rowLine);
LogicalChildren.Add(rowLine);
VisualChildren.Add(rowLine);
}
for (int i = 0; i < RowLines.Count; i++)
{
double y = AccumulatedRowHeights[i + 1] - GridControl.HorizontalLinesThickness / 2.0;
RowLines[i].StartPoint = new Point(0.0, y);
RowLines[i].EndPoint = new Point(AccumulatedColumnWidths[lastAccumulatedColumnWidthsIndex], y);
}
for (int i = 0; i < ColumnLines.Count; i++)
{
double x = AccumulatedColumnWidths[i + 1] - GridControl.VerticalLinesThickness / 2.0;
ColumnLines[i].StartPoint = new Point(x, 0.0);
ColumnLines[i].EndPoint = new Point(x, AccumulatedRowHeights[lastAccumulatedRowHeightsIndex]);
}
foreach (var line in RowLines.Concat(ColumnLines))
{
line.InvalidateMeasure();
line.Measure(Size.Infinity);
}
}
}
