Rectangle ArrangeDown(Rectangle layoutSize)
{
if (layoutSize.Height >= FirstPaneMinSize + SecondPaneMinSize)
{
SplitterOffset = MathHelper.Clamp(SplitterOffset, SecondPaneMinSize, layoutSize.Height - FirstPaneMinSize);
}
var splitterBarHeight = splitterBar.DesiredSize.HeightInt;
if (Collapsed && collapseAnim.IsOver)
{
displayFirstPane = true;
displaySecondPane = false;
layoutSize.Height = Math.Max(layoutSize.Width, splitterBarHeight + FirstPaneMinSize);
var arr = new ArrangerVertical(layoutSize);
arr.Reserve(splitterBarHeight);
arr.Arrange(FirstPane, arr.AvailableHeight).Advance(arr.AvailableHeight);
arr.Arrange(splitterBar, splitterBarHeight).AdvanceReserved(splitterBarHeight);
return(layoutSize);
}
displayFirstPane = true;
displaySecondPane = true;
layoutSize.Height = Math.Max(layoutSize.Height, FirstPaneMinSize + splitterBarHeight + SecondPaneMinSize);
var animatedSplitterPos = (int)MathHelper.Clamp((1f - collapseAnim.CurrentValue) * SplitterOffset, 0, SplitterOffset);
var arr2 = new ArrangerVertical(layoutSize);
arr2.Reserve(animatedSplitterPos);
arr2.Reserve(splitterBarHeight);
arr2.Arrange(FirstPane, arr2.AvailableHeight).Advance(arr2.AvailableHeight);
arr2.Arrange(splitterBar, splitterBarHeight).AdvanceReserved(splitterBarHeight);
arr2.Arrange(SecondPane, SplitterOffset).AdvanceReserved(animatedSplitterPos);
return(layoutSize);
}
Rectangle ArrangeUp(Rectangle layoutSize)
{
if (layoutSize.Height >= FirstPaneMinSize + SecondPaneMinSize)
{
SplitterOffset = MathHelper.Clamp(SplitterOffset, FirstPaneMinSize, layoutSize.Height - SecondPaneMinSize);
}
var splitterBarHeight = splitterBar.DesiredSize.HeightInt;
if (Collapsed && collapseAnim.IsOver)
{
displayFirstPane = false;
displaySecondPane = true;
layoutSize.Height = Math.Max(layoutSize.Height, splitterBarHeight + SecondPaneMinSize);
var arr = new ArrangerVertical(layoutSize);
arr.Arrange(splitterBar, splitterBarHeight).Advance(splitterBarHeight);
arr.Arrange(SecondPane, arr.AvailableHeight).Advance(arr.AvailableHeight);
return(layoutSize);
}
displayFirstPane = true;
displaySecondPane = true;
layoutSize.Height = Math.Max(layoutSize.Height, FirstPaneMinSize + splitterBarHeight + SecondPaneMinSize);
var animatedSplitterPos = (int)MathHelper.Clamp((1f - collapseAnim.CurrentValue) * SplitterOffset, 0, SplitterOffset);
// retain the original size to avoid display artefacts while the 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 ArrangerVertical(layoutSize);
arr2.Arrange(FirstPane, SplitterOffset).Advance(animatedSplitterPos);
arr2.Arrange(splitterBar, splitterBarHeight).Advance(splitterBarHeight);
arr2.Arrange(SecondPane, arr2.AvailableHeight).Advance(arr2.AvailableHeight);
return(layoutSize);
}