protected void Initialise(Canvas aCanvas)
{
int left = (int)iStroke.StrokeWidth;
int right = aCanvas.Width - (int)iStroke.StrokeWidth;
int top = iAnchorOnTop ? iAnchorHeight : (int)iStroke.StrokeWidth;
int bottom = iAnchorOnTop ? aCanvas.Height - (int)iStroke.StrokeWidth : aCanvas.Height - iAnchorHeight - (int)iStroke.StrokeWidth;
int anchorApex = (int)((right - left) * 0.5) - iAnchorOffset;
if (anchorApex < left + iPadding + iCornerRadius)
{
anchorApex = left + iPadding + iCornerRadius;
}
else if (anchorApex + iPadding + iCornerRadius > right)
{
anchorApex = right - iPadding - iCornerRadius;
}
iPath = new Path();
iPath.MoveTo(left, bottom - iCornerRadius);
iPath.LineTo(left, top + iCornerRadius);
RectF rectf = new RectF(left, top, left + iCornerRadius, top + iCornerRadius);
iPath.ArcTo(rectf, 180, 90);
rectf.Dispose();
if (iAnchorOnTop)
{
iPath.LineTo((float)(anchorApex - iAnchorWidth * 0.5), top);
iPath.LineTo(anchorApex, top - iAnchorHeight);
iPath.LineTo((float)(anchorApex + iAnchorWidth * 0.5), top);
}
iPath.LineTo(right - iCornerRadius, top);
rectf = new RectF(right - iCornerRadius, top, right, top + iCornerRadius);
iPath.ArcTo(rectf, 270, 90);
rectf.Dispose();
iPath.LineTo(right, bottom - iCornerRadius);
rectf = new RectF(right - iCornerRadius, bottom - iCornerRadius, right, bottom);
iPath.ArcTo(rectf, 0, 90);
rectf.Dispose();
if (!iAnchorOnTop)
{
iPath.LineTo((float)(anchorApex + iAnchorWidth * 0.5), bottom);
iPath.LineTo(anchorApex, bottom + iAnchorHeight);
iPath.LineTo((float)(anchorApex - iAnchorWidth * 0.5), bottom);
}
iPath.LineTo(left + iCornerRadius, bottom);
rectf = new RectF(left, bottom - iCornerRadius, left + iCornerRadius, bottom);
iPath.ArcTo(rectf, 90, 90);
rectf.Dispose();
rectf = null;
iPath.Close();
iInitialised = true;
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
textPaint.Dispose();
bgCirclePaint.Dispose();
bgBorderPaint.Dispose();
bgProgressPaint.Dispose();
progressPaint.Dispose();
progressPath.Dispose();
cachedRectF.Dispose();
cachedTransformMatrix.Dispose();
textPaint = bgCirclePaint = bgBorderPaint = bgProgressPaint = progressPaint = null;
progressPath = null;
cachedRectF = null;
cachedTransformMatrix = null;
}