// Gets the matrix that transforms the top tab geometries for position on left, right, or bottom
private MatrixTransform GetTabTransform(ClassicBorderStyle style, double xOffset, double yOffset)
{
if (_tabCache == null)
_tabCache = new TabGeometryCache();
if (_tabCache.Transform == null || xOffset != _tabCache.xOffset || yOffset != _tabCache.yOffset)
{
switch (style)
{
case ClassicBorderStyle.TabLeft:
_tabCache.Transform = new MatrixTransform(new Matrix(0.0, 1.0, 1.0, 0.0, xOffset, yOffset));
break;
case ClassicBorderStyle.TabRight:
_tabCache.Transform = new MatrixTransform(new Matrix(0.0, -1.0, -1.0, 0.0, xOffset, yOffset));
break;
case ClassicBorderStyle.TabBottom:
_tabCache.Transform = new MatrixTransform(new Matrix(-1.0, 0.0, 0.0, -1.0, xOffset, yOffset));
break;
}
_tabCache.xOffset = xOffset;
_tabCache.yOffset = yOffset;
}
return _tabCache.Transform;
}
// Get the cache for the Highlight Geometry
private Geometry GetHighlight1(Rect bounds)
{
if (_tabCache == null)
_tabCache = new TabGeometryCache();
if (_tabCache.Bounds != bounds || _tabCache.Highlight1 == null)
{
_tabCache.Highlight1 = GenerateTabTopHighlightGeometry(bounds, true);
_tabCache.Bounds = bounds;
_tabCache.Shadow1 = null; //bounds changed, these are invalid
_tabCache.Highlight2 = null;
_tabCache.Shadow2 = null;
}
return _tabCache.Highlight1;
}
