void DrawSample(Graphics graphics)
{
using (graphics.Generator.Context)
{
graphics.FillRectangle(Brushes.Green(), 0, 0, 200, 200);
if (UseGraphicsPathClip)
{
var path = GraphicsPath.GetRoundRect(new RectangleF(10, 10, 180, 180), 20);
graphics.SetClip(path);
}
else
{
graphics.SetClip(new RectangleF(10, 10, 180, 180));
}
if (UseClearColor)
{
graphics.Clear(new SolidBrush(new Color(Colors.Red, 0.5f)));
}
else
{
graphics.Clear();
}
graphics.FillEllipse(Brushes.Blue(), 25, 25, 150, 150);
}
}
void DrawSample(Graphics graphics)
{
using (graphics.Platform.Context)
{
graphics.FillRectangle(Brushes.Green, 0, 0, 200, 200);
switch (clipMode)
{
case ClearClipMode.GraphicsPath:
var path = GraphicsPath.GetRoundRect(new RectangleF(10, 10, 180, 180), 20);
graphics.SetClip(path);
break;
case ClearClipMode.Rectangle:
graphics.SetClip(new RectangleF(10, 10, 180, 180));
break;
}
if (UseClearColor)
{
graphics.Clear(new SolidBrush(new Color(Colors.Red, 0.5f)));
}
else
{
graphics.Clear();
}
var rnd = new Random();
graphics.FillEllipse(Brushes.Blue, rnd.Next(50), rnd.Next(50), 150, 150);
}
}
void Draw(Graphics g)
{
if (brush == null)
{
return;
}
var rect = new RectangleF(10, 10, 200, 100);
if (Mode == DrawMode.Fill)
{
var pen = new Pen(Colors.Black);
/**/
g.FillEllipse(brush, rect);
g.DrawEllipse(pen, rect);
/**/
rect = new RectangleF(10, 120, 200, 80);
g.FillRectangle(brush, rect);
g.DrawRectangle(pen, rect);
/**/
rect = new RectangleF(10, 210, 200, 80);
g.FillPie(brush, rect, 100, 240);
g.DrawArc(pen, rect, 100, 240);
/**/
var points = new[] { new PointF(300, 10), new PointF(350, 30), new PointF(400, 90), new PointF(320, 100) };
g.FillPolygon(brush, points);
g.DrawPolygon(pen, points);
/**/
var path = GraphicsPath.GetRoundRect(new Rectangle(300, 120, 50, 50), 8);
g.FillPath(brush, path);
g.DrawPath(pen, path);
/**/
pen.Dispose();
}
else
{
var pen = new Pen(brush, 10);
/**/
g.DrawEllipse(pen, rect);
/**/
rect = new RectangleF(10, 120, 200, 80);
g.DrawRectangle(pen, rect);
/**/
rect = new RectangleF(10, 210, 200, 80);
g.DrawArc(pen, rect, 100, 240);
/**/
var points = new[] { new PointF(300, 10), new PointF(350, 30), new PointF(400, 90), new PointF(320, 100) };
g.DrawPolygon(pen, points);
/**/
/**/
var path = GraphicsPath.GetRoundRect(new Rectangle(300, 120, 50, 50), 8);
g.DrawPath(pen, path);
pen.Dispose();
}
}
public ClipTransformSection()
{
Padding = new Padding(10);
var drawable = new Drawable();
bool showInvalid = false;
var showInvalidCheckBox = new CheckBox {
Text = "Show Invalid Regions"
};
showInvalidCheckBox.CheckedBinding.Bind(() => showInvalid, v => { showInvalid = v ?? false; drawable.Invalidate(); });
drawable.Paint += (sender, e) =>
{
var g = e.Graphics;
var rect = new RectangleF(drawable.ClientSize);
Func <RectangleF> boundsRect = () => g.CurrentTransform.Inverse().TransformRectangle(rect);
g.SaveTransform();
g.SetClip(new RectangleF(0, 0, 50, 50));
g.FillRectangle(Colors.Red, rect);
g.TranslateTransform(50, 0);
if (!showInvalid)
{
g.FillRectangle(Colors.Green, boundsRect());
}
g.TranslateTransform(0, 50);
g.SetClip(new RectangleF(0, 0, 50, 50));
g.FillRectangle(Colors.Red, boundsRect());
g.ScaleTransform(2, 2);
g.TranslateTransform(25, 25);
if (!showInvalid)
{
g.FillRectangle(Colors.Green, boundsRect());
}
g.SetClip(GraphicsPath.GetRoundRect(new RectangleF(0, 0, 25, 25), 4));
g.FillRectangle(Colors.Red, boundsRect());
g.ScaleTransform(2, 2);
g.TranslateTransform(25, 25);
if (!showInvalid)
{
g.FillRectangle(Colors.Green, boundsRect());
}
g.SetClip(new RectangleF(-25 / 2f, -25 / 2f, 25 / 2f, 25 / 2f));
g.FillRectangle(Colors.Red, boundsRect());
g.RestoreTransform();
if (!showInvalid)
{
g.FillRectangle(Colors.Green, boundsRect());
}
};
var options = new StackLayout
{
Orientation = Orientation.Horizontal,
VerticalContentAlignment = VerticalAlignment.Center,
Spacing = 5,
Items = { showInvalidCheckBox }
};
Content = new StackLayout {
Spacing = 5,
HorizontalContentAlignment = HorizontalAlignment.Stretch,
Items = { options, new StackLayoutItem(drawable, expand: true) }
};
}
