protected void LayoutLine(IList <FrameworkElement> children, PointF pos, LineMeasurement line)
{
float offset = 0;
for (int i = line.StartIndex; i <= line.EndIndex; i++)
{
FrameworkElement layoutChild = children[i];
SizeF desiredChildSize = layoutChild.DesiredSize;
SizeF size;
PointF location;
if (Orientation == Orientation.Horizontal)
{
size = new SizeF(desiredChildSize.Width, line.TotalExtendsInNonOrientationDirection);
location = new PointF(pos.X + offset, pos.Y);
ArrangeChildVertical(layoutChild, layoutChild.VerticalAlignment, ref location, ref size);
offset += desiredChildSize.Width;
}
else
{
size = new SizeF(line.TotalExtendsInNonOrientationDirection, desiredChildSize.Height);
location = new PointF(pos.X, pos.Y + offset);
ArrangeChildHorizontal(layoutChild, layoutChild.HorizontalAlignment, ref location, ref size);
offset += desiredChildSize.Height;
}
layoutChild.Arrange(SharpDXExtensions.CreateRectangleF(location, size));
}
}
protected override void ArrangeOverride()
{
base.ArrangeOverride();
IList <FrameworkElement> visibleChildren = GetVisibleChildren();
int visibleChildrenCount = visibleChildren.Count;
if (_doScroll)
{
CalculateDesiredSize(new SizeF((float)ActualWidth, (float)ActualHeight), false, out _actualColumnWidth, out _actualRowHeight);
}
else
{
_actualColumnWidth = (float)(ActualWidth / _actualColumns);
_actualRowHeight = (float)(ActualHeight / _actualRows);
}
_actualNumVisibleCols = (int)(ActualWidth / _actualColumnWidth);
_actualNumVisibleRows = (int)(ActualHeight / _actualRowHeight);
if (_doScroll)
{
int maxScrollIndexX = Math.Max(_actualColumns - _actualNumVisibleCols, 0);
int maxScrollIndexY = Math.Max(_actualRows - _actualNumVisibleRows, 0);
if (_scrollIndexX > maxScrollIndexX)
{
_scrollIndexX = maxScrollIndexX;
}
if (_scrollIndexY > maxScrollIndexY)
{
_scrollIndexY = maxScrollIndexY;
}
}
else
{
_scrollIndexX = 0;
_scrollIndexY = 0;
}
// Hint: We cannot skip the arrangement of children above _scrollOffset or below the last visible child
// because the rendering and focus system also needs the bounds of the currently invisible children
for (int i = 0; i < visibleChildrenCount; i++)
{
FrameworkElement child = visibleChildren[i];
SizeF childSize = new SizeF(_actualColumnWidth, _actualRowHeight);
PointF position = new PointF(
ActualPosition.X + (i % _actualColumns - _scrollIndexX) * _actualColumnWidth,
ActualPosition.Y + (i / _actualColumns - _scrollIndexY) * _actualRowHeight);
ArrangeChild(child, child.HorizontalAlignment, child.VerticalAlignment, ref position, ref childSize);
child.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
}
}
protected override void ArrangeTemplateControl()
{
FrameworkElement templateControl = _initializedTemplateControl;
if (templateControl == null)
{
return;
}
lock (_renderLock)
if (_settings == null)
{
return;
}
RectangleF?elementArrangeBounds = _settings.ElementArrangeBounds;
SizeF keyboardSize = templateControl.DesiredSize;
RectangleF actualBounds = ActualBounds;
if (actualBounds.Size.Width < keyboardSize.Width)
{
keyboardSize.Width = actualBounds.Size.Width;
}
if (actualBounds.Size.Height < keyboardSize.Height)
{
keyboardSize.Height = actualBounds.Size.Height;
}
RectangleF keyboardRect;
if (elementArrangeBounds.HasValue)
{
// Arrange above or below elementArrangeBounds, horizontally centered in elementArrangeBounds
keyboardRect = SharpDXExtensions.CreateRectangleF(new PointF(
elementArrangeBounds.Value.Left + elementArrangeBounds.Value.Width / 2 - keyboardSize.Width / 2,
elementArrangeBounds.Value.Bottom + keyboardSize.Height > actualBounds.Bottom ?
elementArrangeBounds.Value.Top - keyboardSize.Height : elementArrangeBounds.Value.Bottom),
keyboardSize);
}
else
{
// Center in actualBounds
keyboardRect = new RectangleF(
actualBounds.Left + (actualBounds.Width - keyboardSize.Width) / 2,
actualBounds.Top + (actualBounds.Height - keyboardSize.Height) / 2,
keyboardSize.Width, keyboardSize.Height);
}
if (keyboardRect.Left < actualBounds.Left)
{
keyboardRect.X = actualBounds.Left;
}
if (keyboardRect.Right > actualBounds.Right)
{
keyboardRect.X = actualBounds.Right - keyboardSize.Width;
}
templateControl.Arrange(keyboardRect);
}
protected override void ArrangeOverride()
{
base.ArrangeOverride();
FrameworkElement content = Content;
if (content != null)
{
PointF position = new PointF(_innerRect.X, _innerRect.Y);
SizeF availableSize = CalculateInnerDesiredSize(_innerRect.Size);
ArrangeChild(content, content.HorizontalAlignment, content.VerticalAlignment, ref position, ref availableSize);
RectangleF childRect = SharpDXExtensions.CreateRectangleF(position, availableSize);
content.Arrange(childRect);
}
}
protected virtual void ArrangeTemplateControl()
{
FrameworkElement templateControl = _templateControl;
if (templateControl == null)
{
return;
}
PointF position = new PointF(_innerRect.X, _innerRect.Y);
SizeF availableSize = new SizeF(_innerRect.Width, _innerRect.Height);
ArrangeChild(templateControl, HorizontalContentAlignment, VerticalContentAlignment,
ref position, ref availableSize);
RectangleF childRect = SharpDXExtensions.CreateRectangleF(position, availableSize);
templateControl.Arrange(childRect);
}
protected override void ArrangeOverride()
{
base.ArrangeOverride();
float x = _innerRect.Location.X;
float y = _innerRect.Location.Y;
foreach (FrameworkElement child in GetVisibleChildren())
{
// Get the coordinates relative to the canvas area.
PointF location = new PointF(GetLeft(child, false) + x, GetTop(child, false) + y);
// Get the child size
SizeF childSize = child.DesiredSize;
// Arrange the child
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childSize));
}
}
protected override SizeF CalculateInnerDesiredSize(SizeF totalSize)
{
RectangleF rect = new RectangleF(0, 0, 0, 0);
UnregisterAllChildCanvasPositionProperties();
foreach (FrameworkElement child in GetVisibleChildren())
{
SizeF childSize = new SizeF(totalSize.Width, totalSize.Height);
child.Measure(ref childSize);
float left = GetLeft(child, true);
float top = GetTop(child, true);
rect = RectangleF.Union(rect, SharpDXExtensions.CreateRectangleF(new PointF(left, top), new SizeF(childSize.Width, childSize.Height)));
}
return(new SizeF(rect.Right, rect.Bottom));
}
protected override void ArrangeOverride()
{
base.ArrangeOverride();
ColumnDefinitions.SetAvailableSize(ActualWidth);
RowDefinitions.SetAvailableSize(ActualHeight);
foreach (FrameworkElement child in GetVisibleChildren())
{
int col = GetColumn(child);
int row = GetRow(child);
if (col >= ColumnDefinitions.Count)
{
col = ColumnDefinitions.Count - 1;
}
if (col < 0)
{
col = 0;
}
if (row >= RowDefinitions.Count)
{
row = RowDefinitions.Count - 1;
}
if (row < 0)
{
row = 0;
}
PointF position = new PointF(
(float)ColumnDefinitions.GetOffset(col) + _innerRect.Location.X,
(float)RowDefinitions.GetOffset(row) + _innerRect.Location.Y);
SizeF childSize = new SizeF(
(float)ColumnDefinitions.GetLength(col, GetColumnSpan(child)),
(float)RowDefinitions.GetLength(row, GetRowSpan(child)));
ArrangeChild(child, child.HorizontalAlignment, child.VerticalAlignment, ref position, ref childSize);
child.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
}
}
protected override void ArrangeOverride()
{
base.ArrangeOverride();
IList <FrameworkElement> visibleChildren = GetVisibleChildren();
if (visibleChildren.Count > 0)
{
float actualWidth = (float)ActualWidth;
float actualHeight = (float)ActualHeight;
// First check how many children we must leave out
float availableSize = Orientation == Orientation.Vertical ? actualHeight : actualWidth;
FrameworkElement firstChild = visibleChildren[0];
SizeF firstChildDesiredSize = firstChild.DesiredSize;
SizeF desiredEllipsisSize = _ellipsisControl == null ? new SizeF() : _ellipsisControl.DesiredSize;
// The first element is always shown
availableSize -= Orientation == Orientation.Vertical ? firstChildDesiredSize.Height : firstChildDesiredSize.Width;
List <FrameworkElement> reversedChildren = new List <FrameworkElement>(visibleChildren);
reversedChildren.Reverse();
reversedChildren.RemoveAt(reversedChildren.Count - 1); // Remove first (home) element
int numShownChildrenAfterEllipsis = 0; // Number of children which fit behind the ellipsis control
float ellipsisSize = Orientation == Orientation.Vertical ? desiredEllipsisSize.Height : desiredEllipsisSize.Width;
foreach (FrameworkElement child in reversedChildren)
{
SizeF desiredChildSize = child.DesiredSize;
float size = Orientation == Orientation.Vertical ? desiredChildSize.Height : desiredChildSize.Width;
if (availableSize >= size + ellipsisSize ||
(availableSize >= size && numShownChildrenAfterEllipsis == visibleChildren.Count - 2))
{
availableSize -= size;
numShownChildrenAfterEllipsis++;
}
else
{
break;
}
}
float startPositionX = 0;
float startPositionY = 0;
List <FrameworkElement> childrenAfterEllipsis = new List <FrameworkElement>(visibleChildren);
if (numShownChildrenAfterEllipsis < visibleChildren.Count - 1)
{ // Ellipsis necessary
// Lay out first (home) element
SizeF childSize = firstChild.DesiredSize;
PointF position = new PointF(ActualPosition.X + startPositionX, ActualPosition.Y + startPositionY);
if (Orientation == Orientation.Vertical)
{
childSize.Width = actualWidth;
ArrangeChildHorizontal(firstChild, firstChild.HorizontalAlignment, ref position, ref childSize);
startPositionY += childSize.Height;
}
else
{
childSize.Height = actualHeight;
ArrangeChildVertical(firstChild, firstChild.VerticalAlignment, ref position, ref childSize);
startPositionX += childSize.Width;
}
firstChild.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
// Lay out ellipsis
if (_ellipsisControl != null)
{
childSize = desiredEllipsisSize;
position = new PointF(ActualPosition.X + startPositionX, ActualPosition.Y + startPositionY);
if (Orientation == Orientation.Vertical)
{
childSize.Width = actualWidth;
ArrangeChildHorizontal(_ellipsisControl, _ellipsisControl.HorizontalAlignment, ref position, ref childSize);
startPositionY += childSize.Height;
}
else
{
childSize.Height = actualHeight;
ArrangeChildVertical(_ellipsisControl, _ellipsisControl.VerticalAlignment, ref position, ref childSize);
startPositionX += childSize.Width;
}
_ellipsisControl.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
}
int numBeforeEllipsis = childrenAfterEllipsis.Count - numShownChildrenAfterEllipsis;
for (int i = 1; i < numBeforeEllipsis; i++)
{
childrenAfterEllipsis[i].Arrange(RectangleF.Empty);
}
childrenAfterEllipsis.RemoveRange(0, numBeforeEllipsis);
}
else if (_ellipsisControl != null)
{
// childrenAfterEllipsis contains all children in this case
_ellipsisControl.Arrange(RectangleF.Empty);
}
// Lay out all other elements after ellipsis
foreach (FrameworkElement child in childrenAfterEllipsis)
{
SizeF childSize = child.DesiredSize;
PointF position = new PointF(ActualPosition.X + startPositionX, ActualPosition.Y + startPositionY);
if (Orientation == Orientation.Vertical)
{
childSize.Width = actualWidth;
ArrangeChildHorizontal(child, child.HorizontalAlignment, ref position, ref childSize);
startPositionY += childSize.Height;
}
else
{
childSize.Height = actualHeight;
ArrangeChildVertical(child, child.VerticalAlignment, ref position, ref childSize);
startPositionX += childSize.Width;
}
child.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
}
}
}
/// <summary>
/// Creates a rectangular <see cref="GraphicsPath"/> with rounded edges, optionally with an open title
/// region specified by the parameters <paramref name="titleInset"/> and <paramref name="titleWidth"/>.
/// </summary>
/// <param name="baseRect">The rect which surrounds the created path.</param>
/// <param name="radiusX">The X radius of the rounded edges.</param>
/// <param name="radiusY">The Y radius of the rounded edges.</param>
/// <param name="withTitleRegion">If set to <c>true</c>, a title region will be left out.</param>
/// <param name="titleInset">Inset of the title region behind the corner. This parameter will only be used if
/// <paramref name="withTitleRegion"/> is set to <c>true</c>.</param>
/// <param name="titleWidth">Width of the title region to leave out. This parameter will only be used if
/// <paramref name="withTitleRegion"/> is set to <c>true</c>.</param>
public static GraphicsPath CreateRoundedRectWithTitleRegionPath(RectangleF baseRect, float radiusX, float radiusY,
bool withTitleRegion, float titleInset, float titleWidth)
{
GraphicsPath result = new GraphicsPath();
if (radiusX <= 0.0f && radiusY <= 0.0f || baseRect.Width == 0 || baseRect.Height == 0)
{
// if corner radius is less than or equal to zero, return the original rectangle
if (withTitleRegion)
{ // If we should leave out a title region, we need to do it manually, because we need to start next to the
// title.
titleWidth = Math.Min(titleWidth, baseRect.Width - 2 * titleInset);
// Right from the title to the upper right edge
result.AddLine(baseRect.Left + 2 * titleInset + titleWidth, baseRect.Top,
baseRect.Right, baseRect.Top);
// Upper right edge to lower right edge
result.AddLine(baseRect.Right, baseRect.Top,
baseRect.Right, baseRect.Bottom);
// Lower right edge to lower left edge
result.AddLine(baseRect.Right, baseRect.Bottom,
baseRect.Left, baseRect.Bottom);
// Lower left edge to upper left edge
result.AddLine(baseRect.Left, baseRect.Bottom,
baseRect.Left, baseRect.Top);
// Upper left edge to the left side of the title
result.AddLine(baseRect.Left, baseRect.Top, baseRect.Left + titleInset, baseRect.Top);
}
else
{
result.AddRectangle(baseRect.ToDrawingRectF());
}
}
else
{
if (radiusX >= baseRect.Width / 2f)
{
radiusX = baseRect.Width / 2f;
}
if (radiusY >= baseRect.Height / 2f)
{
radiusY = baseRect.Height / 2f;
}
// create the arc for the rectangle sides and declare a graphics path object for the drawing
SizeF sizeF = new SizeF(radiusX * 2f, radiusY * 2f);
RectangleF arc = SharpDXExtensions.CreateRectangleF(baseRect.Location, sizeF);
if (withTitleRegion)
{
titleWidth = Math.Min(titleWidth, baseRect.Width - 2 * (radiusX + titleInset));
// Right of the title to the upper right edge
result.AddLine(baseRect.Left + radiusX + titleInset + titleWidth, baseRect.Top,
baseRect.Right - radiusX, baseRect.Top);
}
// Top right arc
arc.X = baseRect.Right - radiusX * 2f;
result.AddArc(arc.ToDrawingRectF(), 270, 90);
// Bottom right arc
arc.Y = baseRect.Bottom - radiusY * 2f;
result.AddArc(arc.ToDrawingRectF(), 0, 90);
// Bottom left arc
arc.X = baseRect.Left;
result.AddArc(arc.ToDrawingRectF(), 90, 90);
// Top left arc
arc.Y = baseRect.Top;
result.AddArc(arc.ToDrawingRectF(), 180, 90);
if (withTitleRegion)
{
// Upper left edge to the left side of the title
result.AddLine(baseRect.Left + radiusX, baseRect.Top, baseRect.Left + radiusX + titleInset, baseRect.Top);
}
else
{
result.CloseFigure();
}
}
result.Flatten();
return(result);
}
protected override void ArrangeTemplateControl()
{
if (_templateControl == null)
{
_scrollOffsetX = 0;
_scrollOffsetY = 0;
}
else
{
SizeF desiredSize = _templateControl.DesiredSize;
PointF position;
SizeF availableSize;
if (_doScroll || AutoCentering != ScrollAutoCenteringEnum.None)
{
availableSize = _innerRect.Size;
if (desiredSize.Width > _innerRect.Width)
{
if (!IsHorzCentering)
{
_scrollOffsetX = Math.Max(_scrollOffsetX, _innerRect.Width - desiredSize.Width);
}
availableSize.Width = desiredSize.Width;
}
else if (!IsHorzCentering)
{
_scrollOffsetX = 0;
}
if (desiredSize.Height > _innerRect.Height)
{
if (!IsVertCentering)
{
_scrollOffsetY = Math.Max(_scrollOffsetY, _innerRect.Height - desiredSize.Height);
}
availableSize.Height = desiredSize.Height;
}
else if (!IsVertCentering)
{
_scrollOffsetY = 0;
}
position = new PointF(_innerRect.X + _scrollOffsetX, _innerRect.Y + _scrollOffsetY);
}
else
{
_scrollOffsetX = 0;
_scrollOffsetY = 0;
position = new PointF(_innerRect.X, _innerRect.Y);
availableSize = _innerRect.Size;
}
if (HorizontalFitToSpace)
{
availableSize.Width = _innerRect.Size.Width;
}
if (VerticalFitToSpace)
{
availableSize.Height = _innerRect.Size.Height;
}
ArrangeChild(_templateControl, _templateControl.HorizontalAlignment, _templateControl.VerticalAlignment,
ref position, ref availableSize);
RectangleF childRect = SharpDXExtensions.CreateRectangleF(position, availableSize);
_templateControl.Arrange(childRect);
}
_actualScrollOffsetX = _scrollOffsetX;
_actualScrollOffsetY = _scrollOffsetY;
}
protected virtual void ArrangeChildren()
{
bool fireScrolled = false;
_totalHeight = 0;
_totalWidth = 0;
IList <FrameworkElement> visibleChildren = GetVisibleChildren();
int numVisibleChildren = visibleChildren.Count;
if (numVisibleChildren > 0)
{
PointF actualPosition = ActualPosition;
SizeF actualSize = new SizeF((float)ActualWidth, (float)ActualHeight);
// For Orientation == vertical, this is ActualHeight, for horizontal it is ActualWidth
float actualExtendsInOrientationDirection = GetExtendsInOrientationDirection(Orientation, actualSize);
// For Orientation == vertical, this is ActualWidth, for horizontal it is ActualHeight
float actualExtendsInNonOrientationDirection = GetExtendsInNonOrientationDirection(Orientation, actualSize);
// Hint: We cannot skip the arrangement of children above _actualFirstVisibleChildIndex or below _actualLastVisibleChildIndex
// because the rendering and focus system also needs the bounds of the currently invisible children
float startPosition = 0;
// If set to true, we'll check available space from the last to first visible child.
// That is necessary if we want to scroll a specific child to the last visible position.
bool invertLayouting = false;
lock (_renderLock)
if (_pendingScrollIndex.HasValue)
{
fireScrolled = true;
int pendingSI = _pendingScrollIndex.Value;
if (_scrollToFirst)
{
_actualFirstVisibleChildIndex = pendingSI;
}
else
{
_actualLastVisibleChildIndex = pendingSI;
invertLayouting = true;
}
_pendingScrollIndex = null;
}
// 1) Calculate scroll indices
if (_doScroll)
{ // Calculate last visible child
float spaceLeft = actualExtendsInOrientationDirection;
if (invertLayouting)
{
CalcHelper.Bound(ref _actualLastVisibleChildIndex, 0, numVisibleChildren - 1);
_actualFirstVisibleChildIndex = _actualLastVisibleChildIndex + 1;
while (_actualFirstVisibleChildIndex > 0)
{
FrameworkElement child = visibleChildren[_actualFirstVisibleChildIndex - 1];
spaceLeft -= GetExtendsInOrientationDirection(Orientation, child.DesiredSize);
if (spaceLeft + DELTA_DOUBLE < 0)
{
break; // Found item which is not visible any more
}
_actualFirstVisibleChildIndex--;
}
if (_actualFirstVisibleChildIndex > _actualLastVisibleChildIndex)
{
// Happens if the item at _actualFirstVisibleChildIndex is bigger than the available space
_actualFirstVisibleChildIndex = _actualLastVisibleChildIndex;
}
if (spaceLeft > 0)
{ // Correct the last scroll index to fill the available space
while (_actualLastVisibleChildIndex < numVisibleChildren - 1)
{
FrameworkElement child = visibleChildren[_actualLastVisibleChildIndex + 1];
spaceLeft -= GetExtendsInOrientationDirection(Orientation, child.DesiredSize);
if (spaceLeft + DELTA_DOUBLE < 0)
{
break; // Found item which is not visible any more
}
_actualLastVisibleChildIndex++;
}
}
}
else
{
CalcHelper.Bound(ref _actualFirstVisibleChildIndex, 0, numVisibleChildren - 1);
_actualLastVisibleChildIndex = _actualFirstVisibleChildIndex - 1;
while (_actualLastVisibleChildIndex < numVisibleChildren - 1)
{
FrameworkElement child = visibleChildren[_actualLastVisibleChildIndex + 1];
spaceLeft -= GetExtendsInOrientationDirection(Orientation, child.DesiredSize);
if (spaceLeft + DELTA_DOUBLE < 0)
{
break; // Found item which is not visible any more
}
_actualLastVisibleChildIndex++;
}
if (_actualLastVisibleChildIndex < _actualFirstVisibleChildIndex)
{
// Happens if the item at _actualFirstVisibleChildIndex is bigger than the available space
_actualLastVisibleChildIndex = _actualFirstVisibleChildIndex;
}
if (spaceLeft > 0)
{ // Correct the first scroll index to fill the available space
while (_actualFirstVisibleChildIndex > 0)
{
FrameworkElement child = visibleChildren[_actualFirstVisibleChildIndex - 1];
spaceLeft -= GetExtendsInOrientationDirection(Orientation, child.DesiredSize);
if (spaceLeft + DELTA_DOUBLE < 0)
{
break; // Found item which is not visible any more
}
_actualFirstVisibleChildIndex--;
}
}
}
}
else
{
_actualFirstVisibleChildIndex = 0;
_actualLastVisibleChildIndex = numVisibleChildren - 1;
}
// 2) Calculate start position
for (int i = 0; i < _actualFirstVisibleChildIndex; i++)
{
FrameworkElement child = visibleChildren[i];
startPosition -= GetExtendsInOrientationDirection(Orientation, child.DesiredSize);
}
// 3) Arrange children
if (Orientation == Orientation.Vertical)
{
_totalWidth = actualExtendsInNonOrientationDirection;
}
else
{
_totalHeight = actualExtendsInNonOrientationDirection;
}
foreach (FrameworkElement child in visibleChildren)
{
SizeF childSize = child.DesiredSize;
// For Orientation == vertical, this is childSize.Height, for horizontal it is childSize.Width
float desiredExtendsInOrientationDirection = GetExtendsInOrientationDirection(Orientation, childSize);
if (Orientation == Orientation.Vertical)
{
PointF position = new PointF(actualPosition.X, actualPosition.Y + startPosition);
childSize.Width = actualExtendsInNonOrientationDirection;
ArrangeChildHorizontal(child, child.HorizontalAlignment, ref position, ref childSize);
child.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
_totalHeight += desiredExtendsInOrientationDirection;
startPosition += desiredExtendsInOrientationDirection;
}
else
{
PointF position = new PointF(actualPosition.X + startPosition, actualPosition.Y);
childSize.Height = actualExtendsInNonOrientationDirection;
ArrangeChildVertical(child, child.VerticalAlignment, ref position, ref childSize);
child.Arrange(SharpDXExtensions.CreateRectangleF(position, childSize));
_totalWidth += desiredExtendsInOrientationDirection;
startPosition += desiredExtendsInOrientationDirection;
}
}
// 4) Add size gap for the last item if we use logical scrolling. If we scroll to the bottom/to the right, there might be a gap from the last item
// to the end of the area. We need to add that gap to make the scroll bars show the correct size.
if (_doScroll)
{
float spaceLeft = actualExtendsInOrientationDirection;
for (int i = _actualFirstVisibleChildIndex; i <= _actualFirstVisibleChildIndex; i++)
{
FrameworkElement child = visibleChildren[i];
float childSize = GetExtendsInOrientationDirection(Orientation, child.DesiredSize);
if (childSize < spaceLeft + DELTA_DOUBLE)
{
spaceLeft -= childSize;
}
else
{
if (Orientation == Orientation.Vertical)
{
_totalHeight += spaceLeft;
}
else
{
_totalWidth += spaceLeft;
}
break;
}
}
}
}
else
{
_actualFirstVisibleChildIndex = 0;
_actualLastVisibleChildIndex = -1;
}
if (fireScrolled)
{
InvokeScrolled();
}
}
protected override void ArrangeOverride()
{
base.ArrangeOverride();
float offsetTop = 0.0f;
float offsetLeft = 0.0f;
float offsetRight = 0.0f;
float offsetBottom = 0.0f;
SizeF availableSize = new SizeF(_innerRect.Width, _innerRect.Height);
int count = 0;
// Area allocated to child
SizeF childArea;
IList <FrameworkElement> visibleChildren = GetVisibleChildren();
foreach (FrameworkElement child in visibleChildren)
{
count++;
//Trace.WriteLine(String.Format("DockPanel:arrange {0} {1}", count, child.Name));
// Size of the child
SizeF childSize = child.DesiredSize;
switch (GetDock(child))
{
case Dock.Top:
{
PointF location = new PointF(offsetLeft, offsetTop);
location.X += ActualPosition.X;
location.Y += ActualPosition.Y;
// Allocate area to child
if (count == visibleChildren.Count && LastChildFill)
{
childArea = new SizeF(availableSize.Width, availableSize.Height);
}
else
{
childArea = new SizeF(availableSize.Width, childSize.Height);
}
// Position the child within the child area
ArrangeChildHorizontal(child, child.HorizontalAlignment, ref location, ref childArea);
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childArea));
offsetTop += childArea.Height;
availableSize.Height -= childArea.Height;
}
break;
case Dock.Bottom:
{
PointF location;
if (count == visibleChildren.Count && LastChildFill)
{
location = new PointF(offsetLeft, _innerRect.Height - (offsetBottom + availableSize.Height));
}
else
{
location = new PointF(offsetLeft, _innerRect.Height - (offsetBottom + childSize.Height));
}
location.X += ActualPosition.X;
location.Y += ActualPosition.Y;
// Allocate area to child
if (count == visibleChildren.Count && LastChildFill)
{
childArea = new SizeF(availableSize.Width, availableSize.Height);
}
else
{
childArea = new SizeF(availableSize.Width, childSize.Height);
}
// Position the child within the child area
ArrangeChildHorizontal(child, child.HorizontalAlignment, ref location, ref childArea);
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childArea));
offsetBottom += childArea.Height;
availableSize.Height -= childArea.Height;
}
break;
case Dock.Left:
{
PointF location = new PointF(offsetLeft, offsetTop);
location.X += ActualPosition.X;
location.Y += ActualPosition.Y;
// Allocate area to child
if (count == visibleChildren.Count && LastChildFill)
{
childArea = new SizeF(availableSize.Width, availableSize.Height);
}
else
{
childArea = new SizeF(childSize.Width, availableSize.Height);
}
// Position the child within the child area
ArrangeChildVertical(child, child.VerticalAlignment, ref location, ref childArea);
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childArea));
offsetLeft += childArea.Width;
availableSize.Width -= childArea.Width;
}
break;
case Dock.Right:
{
PointF location;
if (count == visibleChildren.Count && LastChildFill)
{
location = new PointF(_innerRect.Width - (offsetRight + availableSize.Width), offsetTop);
}
else
{
location = new PointF(_innerRect.Width - (offsetRight + childSize.Width), offsetTop);
}
location.X += ActualPosition.X;
location.Y += ActualPosition.Y;
// Allocate area to child
if (count == visibleChildren.Count && LastChildFill)
{
childArea = new SizeF(availableSize.Width, availableSize.Height);
}
else
{
childArea = new SizeF(childSize.Width, availableSize.Height);
}
// Position the child within the child area
ArrangeChildVertical(child, child.VerticalAlignment, ref location, ref childArea);
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childArea));
offsetRight += childArea.Width;
availableSize.Width -= childArea.Width;
}
break;
default: // Dock.Center
{
PointF location = new PointF(offsetLeft, offsetTop);
location.X += ActualPosition.X;
location.Y += ActualPosition.Y;
childSize = new SizeF(availableSize.Width, availableSize.Height);
if (count == visibleChildren.Count && LastChildFill)
{
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childSize));
}
else
{
ArrangeChild(child, child.HorizontalAlignment, child.VerticalAlignment, ref location, ref childSize);
child.Arrange(SharpDXExtensions.CreateRectangleF(location, childSize));
}
// Do not remove child size from a border offset or from size - the child will
// stay in the "empty space" without taking place from the border layouting variables
}
break;
}
}
}