public override void draw(android.graphics.Canvas canvas)
{
bool vertical = mVertical;
int extent = mExtent;
int range = mRange;
bool drawTrack_1 = true;
bool drawThumb_1 = true;
if (extent <= 0 || range <= extent)
{
drawTrack_1 = vertical ? mAlwaysDrawVerticalTrack : mAlwaysDrawHorizontalTrack;
drawThumb_1 = false;
}
android.graphics.Rect r = getBounds();
if (canvas.quickReject(r.left, r.top, r.right, r.bottom, android.graphics.Canvas.EdgeType
.AA))
{
return;
}
if (drawTrack_1)
{
drawTrack(canvas, r, vertical);
}
if (drawThumb_1)
{
int size = vertical ? r.height() : r.width();
int thickness = vertical ? r.width() : r.height();
int length = Sharpen.Util.Round((float)size * extent / range);
int offset = Sharpen.Util.Round((float)(size - length) * mOffset / (range - extent
));
// avoid the tiny thumb
int minLength = thickness * 2;
if (length < minLength)
{
length = minLength;
}
// avoid the too-big thumb
if (offset + length > size)
{
offset = size - length;
}
drawThumb(canvas, r, offset, length, vertical);
}
}