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public AddEllipseInRect ( |
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| rect | ||
| return | void | |
public static void FillEllipsis(CGContext context, RectangleF rect, CGColor color, float lineWidth)
{
context.SaveState();
context.SetFillColor(color);
context.AddEllipseInRect(rect);
context.FillPath();
context.RestoreState();
}
public override void DrawInContext (CGContext context)
{
base.DrawInContext (context);
context.AddEllipseInRect (Bounds);
context.SetFillColor (ClockColor);
context.FillPath ();
}
public static void DrawEllipsis(CGContext context, RectangleF rect, CGColor color, float lineWidth)
{
context.SaveState();
context.SetStrokeColor(color);
context.SetLineWidth(lineWidth);
context.AddEllipseInRect(rect);
context.StrokePath();
context.RestoreState();
}
static void make_arcs(CGContext graphics, float x, float y, float width, float height, float startAngle, float sweepAngle,
bool convert_units, bool antialiasing, bool isPieSlice)
{
int i;
float drawn = 0;
float endAngle;
bool enough = false;
// I do not think we need to convert the units so commented this out.
/* if required deal, once and for all, with unit conversions */
//if (convert_units && !OPTIMIZE_CONVERSION(graphics))
//{
// x = gdip_unitx_convgr(graphics, x);
// y = gdip_unity_convgr(graphics, y);
// width = gdip_unitx_convgr(graphics, width);
// height = gdip_unity_convgr(graphics, height);
//}
if (Math.Abs(sweepAngle) >= 360)
{
graphics.AddEllipseInRect(new RectangleF(x,y,width,height));
return;
}
endAngle = startAngle + sweepAngle;
/* if we end before the start then reverse positions (to keep increment positive) */
if (endAngle < startAngle)
{
var temp = endAngle;
endAngle = startAngle;
startAngle = temp;
}
if (isPieSlice) {
graphics.MoveTo(x + (width / 2), y + (height / 2));
}
/* i is the number of sub-arcs drawn, each sub-arc can be at most 90 degrees.*/
/* there can be no more then 4 subarcs, ie. 90 + 90 + 90 + (something less than 90) */
for (i = 0; i < 4; i++)
{
float current = startAngle + drawn;
float additional;
if (enough)
{
if (isPieSlice)
{
graphics.ClosePath();
}
return;
}
additional = endAngle - current; /* otherwise, add the remainder */
if (additional > 90)
{
additional = 90.0f;
}
else
{
/* a near zero value will introduce bad artefact in the drawing (#78999) */
if (( additional >= -0.0001f) && (additional <= 0.0001f))
return;
enough = true;
}
make_arc(graphics, (i == 0), /* only move to the starting pt in the 1st iteration */
x, y, width, height, /* bounding rectangle */
current, current + additional, antialiasing, isPieSlice);
drawn += additional;
}
if (isPieSlice) {
graphics.ClosePath();
}
}