public override void Update(GameTime elapsedTime)
{
base.Update(elapsedTime);
var collapseValue = collapseAnim.CurrentValue;
if (Collapsed)
{
collapseAnim.Direction = AnimationDirection.Forward;
collapseAnim.Update(elapsedTime);
}
else
{
collapseAnim.Direction = AnimationDirection.Backward;
collapseAnim.Update(elapsedTime);
}
if (Math.Abs(collapseValue - collapseAnim.CurrentValue) > 0.0005)
{
InvalidateLayout();
}
splitterBar.Update(elapsedTime);
FirstPane?.Update(elapsedTime);
SecondPane?.Update(elapsedTime);
}
protected override void DrawChildren(IBatchedDrawingService drawingService)
{
splitterBar.Draw(drawingService);
if (displayFirstPane && FirstPane != null)
{
var clipping = FirstPaneClippingRect();
drawingService.PushScissorRectangle(clipping);
FirstPane.Draw(drawingService);
drawingService.PopScissorRectangle();
}
if (displaySecondPane && SecondPane != null)
{
drawingService.PushScissorRectangle(SecondPaneClippingRect());
SecondPane.Draw(drawingService);
drawingService.PopScissorRectangle();
}
}
protected override Size MeasureOverride(Size availableSize)
{
splitterBar.Measure(availableSize);
var firstComponentSize = new Size();
var secondComponentSize = new Size();
if (Direction.IsHorizontal())
{
if (float.IsInfinity(availableSize.Width))
{
firstComponentSize.Width = float.PositiveInfinity;
secondComponentSize.Width = float.PositiveInfinity;
}
else
{
var firstComponentConsumedSpace = Math.Max(Math.Min(availableSize.Width, SplitterOffset), FirstPaneMinSize);
var remainingSpace = Math.Max(0, availableSize.Width - firstComponentConsumedSpace - splitterBar.DesiredSize.Width);
firstComponentSize.Width = firstComponentConsumedSpace;
secondComponentSize.Width = Math.Max(remainingSpace, SecondPaneMinSize);
}
firstComponentSize.Height = availableSize.Height;
secondComponentSize.Height = availableSize.Height;
}
else
{
firstComponentSize.Width = availableSize.Width;
secondComponentSize.Width = availableSize.Width;
if (float.IsInfinity(availableSize.Height))
{
firstComponentSize.Height = float.PositiveInfinity;
secondComponentSize.Height = float.PositiveInfinity;
}
else
{
var firstComponentConsumedSpace = Math.Max(Math.Min(availableSize.Height, SplitterOffset), FirstPaneMinSize);
var remainingSpace = Math.Max(0, availableSize.Height - firstComponentConsumedSpace - splitterBar.DesiredSize.Height);
firstComponentSize.Height = firstComponentConsumedSpace;
secondComponentSize.Height = Math.Max(remainingSpace, SecondPaneMinSize);
}
}
FirstPane?.Measure(firstComponentSize);
SecondPane?.Measure(secondComponentSize);
firstComponentSize = FirstPane?.DesiredSize ?? new Size();
secondComponentSize = SecondPane?.DesiredSize ?? new Size();
switch (Direction)
{
case Direction.Left:
{
SplitterOffset = Math.Max(SplitterOffset, FirstPaneMinSize);
var collapsedSplitterOffset = (int)Math.Max(0, (1f - collapseAnim.CurrentValue) * SplitterOffset);
var secondPaneWidth = Math.Max(SecondPaneMinSize, SecondPane?.DesiredSize.Width ?? 0);
var width = secondPaneWidth + splitterBar.DesiredSize.Width + collapsedSplitterOffset;
return(new Size(width, Math.Max(splitterBar.DesiredSize.Height, Math.Max(firstComponentSize.Height, secondComponentSize.Height))));
}
case Direction.Right:
{
SplitterOffset = Math.Max(SplitterOffset, SecondPaneMinSize);
var collapsedSplitterOffset = (int)Math.Max(0, (1f - collapseAnim.CurrentValue) * SplitterOffset);
var firstPaneWidth = Math.Max(FirstPaneMinSize, FirstPane?.DesiredSize.Width ?? 0);
var width = firstPaneWidth + splitterBar.DesiredSize.Width + collapsedSplitterOffset;
return(new Size(width, Math.Max(splitterBar.DesiredSize.Height, Math.Max(firstComponentSize.Height, secondComponentSize.Height))));
}
case Direction.Up:
{
SplitterOffset = Math.Max(SplitterOffset, FirstPaneMinSize);
var collapsedSplitterOffset = (int)Math.Max(0, (1f - collapseAnim.CurrentValue) * SplitterOffset);
var secondPaneHeight = Math.Max(SecondPaneMinSize, SecondPane?.DesiredSize.Height ?? 0);
var height = secondPaneHeight + splitterBar.DesiredSize.Height + collapsedSplitterOffset;
return(new Size(Math.Max(splitterBar.DesiredSize.Width, Math.Max(firstComponentSize.Width, secondComponentSize.Width)), height));
}
case Direction.Down:
{
SplitterOffset = Math.Max(SplitterOffset, SecondPaneMinSize);
var collapsedSplitterOffset = (int)Math.Max(0, (1f - collapseAnim.CurrentValue) * SplitterOffset);
var firstPaneHeight = Math.Max(FirstPaneMinSize, FirstPane?.DesiredSize.Height ?? 0);
var height = firstPaneHeight + splitterBar.DesiredSize.Height + collapsedSplitterOffset;
return(new Size(Math.Max(splitterBar.DesiredSize.Width, Math.Max(firstComponentSize.Width, secondComponentSize.Width)), height));
}
default:
throw new ArgumentOutOfRangeException();
}
}