Rectangle ArrangeLeft(Rectangle layoutSize)
{
if (layoutSize.Width >= FirstPaneMinSize + SecondPaneMinSize)
{
SplitterOffset = MathHelper.Clamp(SplitterOffset, FirstPaneMinSize, layoutSize.Width - SecondPaneMinSize);
}
var splitterBarWidth = splitterBar.DesiredSize.WidthInt;
if (Collapsed && collapseAnim.IsOver)
{
displayFirstPane = false;
displaySecondPane = true;
layoutSize.Width = Math.Max(layoutSize.Width, splitterBarWidth + SecondPaneMinSize);
var arr = new ArrangerHorizontal(layoutSize);
arr.Arrange(splitterBar, splitterBarWidth).Advance(splitterBarWidth);
arr.Arrange(SecondPane, arr.AvailableWidth).Advance(arr.AvailableWidth);
return(layoutSize);
}
displayFirstPane = true;
displaySecondPane = true;
var layoutWidth2 = Math.Max(layoutSize.Width, FirstPaneMinSize + splitterBarWidth + SecondPaneMinSize);
var animatedSplitterPos = (int)MathHelper.Clamp((1f - collapseAnim.CurrentValue) * SplitterOffset, 0, SplitterOffset);
// FirstPane might be shrinking to zero while playing the collapse-animation.
// We therefore arrange it with its non-collapsed sizing. The remaining parts (splitter-bar, right component)
// will be positioned and expanded according to the current status of the animation.
// retain the original size to avoid display artefacts while the left pane is visually shrinking.
// if the animation is over, we either have a fully collapsed pane (see above) or a fully expanded pane.
var arr2 = new ArrangerHorizontal(layoutSize);
arr2.Arrange(FirstPane, SplitterOffset).Advance(animatedSplitterPos);
arr2.Arrange(splitterBar, splitterBarWidth).Advance(splitterBarWidth);
arr2.Arrange(SecondPane, arr2.AvailableWidth).Advance(arr2.AvailableWidth);
layoutSize.Width = layoutWidth2;
return(layoutSize);
}
Rectangle ArrangeRight(Rectangle layoutSize)
{
if (layoutSize.Width >= FirstPaneMinSize + SecondPaneMinSize)
{
SplitterOffset = MathHelper.Clamp(SplitterOffset, SecondPaneMinSize, layoutSize.Width - FirstPaneMinSize);
}
var splitterBarWidth = splitterBar.DesiredSize.WidthInt;
if (Collapsed && collapseAnim.IsOver)
{
displayFirstPane = true;
displaySecondPane = false;
layoutSize.Width = Math.Max(layoutSize.Width, splitterBarWidth + FirstPaneMinSize);
var arr = new ArrangerHorizontal(layoutSize);
arr.Reserve(splitterBarWidth).Arrange(FirstPane, arr.AvailableWidth).Advance(arr.AvailableWidth);
arr.Arrange(splitterBar, splitterBarWidth).AdvanceReserved(splitterBarWidth);
return(layoutSize);
}
displayFirstPane = true;
displaySecondPane = true;
layoutSize.Width = Math.Max(layoutSize.Width, FirstPaneMinSize + splitterBarWidth + SecondPaneMinSize);
var animatedSplitterPos = (int)MathHelper.Clamp((1f - collapseAnim.CurrentValue) * SplitterOffset, 0, SplitterOffset);
var arr2 = new ArrangerHorizontal(layoutSize);
arr2.Reserve(animatedSplitterPos);
arr2.Reserve(splitterBarWidth);
arr2.Arrange(FirstPane, arr2.AvailableWidth).Advance(arr2.AvailableWidth);
arr2.Arrange(splitterBar, splitterBarWidth).AdvanceReserved(splitterBarWidth);
arr2.Arrange(SecondPane, SplitterOffset).AdvanceReserved(animatedSplitterPos);
return(layoutSize);
}
protected override Rectangle ArrangeOverride(Rectangle layoutSize)
{
if (string.IsNullOrEmpty(Label.Text))
{
Image.Arrange(layoutSize);
return(Image.LayoutRect);
}
if (!Image.HasTexture)
{
Label.Arrange(layoutSize);
return(Label.LayoutRect);
}
var actualWidth = DesiredSize.WidthInt;
var center = layoutSize.Center;
int left;
int spaceToRight;
switch (Label.Alignment)
{
case Alignment.Start:
case Alignment.Fill:
{
left = layoutSize.X;
spaceToRight = Math.Max(0, layoutSize.Width - actualWidth);
break;
}
case Alignment.Center:
{
left = center.X - actualWidth / 2;
spaceToRight = Math.Max(0, layoutSize.Width - (center.X + actualWidth / 2));
}
break;
case Alignment.End:
{
left = layoutSize.Right - actualWidth;
spaceToRight = 0;
break;
}
default:
{
throw new NotSupportedException();
}
}
var arr = new ArrangerHorizontal(layoutSize);
arr.Advance(left - layoutSize.X);
arr.Reserve(spaceToRight);
arr.Arrange(Image, Image.DesiredSize.WidthInt).Advance(Image.DesiredSize.WidthInt);
arr.Advance(IconTextGap);
arr.Arrange(Label, arr.AvailableWidth);
var x = Image.LayoutRect.X;
var y = Math.Min(Image.LayoutRect.Y, Label.LayoutRect.Y);
var width = Math.Max(0, Label.LayoutRect.Right - Image.LayoutRect.X);
var height = Math.Max(0, Math.Max(Image.LayoutRect.Bottom, Label.LayoutRect.Bottom) - y);
return(new Rectangle(x, y, width, height));
}