public static void Draw(Graphics graphics)
{
var generator = graphics.Generator;
var image = TestIcons.TestImage(generator);
// lines
var whitePen = Pens.White(generator);
graphics.DrawLine(whitePen, 1, 1, 99, 99);
graphics.DrawLine(whitePen, 50, 1, 50, 99);
graphics.DrawLine(whitePen, 1, 51, 99, 51);
graphics.DrawRectangle(Pens.White(generator), 101, 1, 100, 100);
graphics.DrawRectangle(Pens.White(generator), 101, 1, 10, 10);
graphics.DrawEllipse(Pens.Green(generator), 101, 1, 100, 100);
graphics.DrawPolygon(Pens.White(generator), new PointF(203, 1), new PointF(253, 51), new Point(203, 101), new PointF(203, 1), new PointF(253, 1), new PointF(253, 101), new PointF(203, 101));
var rect = new RectangleF(255, 1, 100, 100);
graphics.DrawArc(Pens.LightGreen(generator), rect, 180, 90);
graphics.DrawArc(Pens.SkyBlue(generator), rect, 0, 90);
rect.Inflate(-15, 0);
graphics.DrawArc(Pens.FloralWhite(generator), rect, -45, 90);
rect.Inflate(-5, -20);
graphics.DrawArc(Pens.SlateGray(generator), rect, -45, 270);
rect.Inflate(-10, -10);
graphics.DrawArc(Pens.SteelBlue(generator), rect, 180 + 45, 270);
graphics.DrawImage(image, 100, 1, 100, 100);
graphics.DrawText(Fonts.Sans(12 * graphics.PointsPerPixel, generator: generator), Colors.White, 0, 104, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
// filled
graphics.FillRectangle(Brushes.White(generator), 101, 120, 100, 100);
graphics.FillRectangle(Brushes.Gray(generator), 101, 120, 10, 10);
graphics.FillEllipse(Brushes.Green(generator), 101, 120, 100, 100);
graphics.FillPolygon(Brushes.White(generator), new PointF(202, 120), new PointF(252, 170), new Point(202, 220), new PointF(202, 120));
rect = new RectangleF(255, 120, 100, 100);
graphics.FillPie(Brushes.LightGreen(generator), rect, 180, 90);
graphics.FillPie(Brushes.SkyBlue(generator), rect, 0, 90);
rect.Inflate(-15, 0);
graphics.FillPie(Brushes.FloralWhite(generator), rect, -45, 90);
rect.Inflate(-5, -20);
graphics.FillPie(Brushes.SlateGray(generator), rect, -45, 270);
rect.Inflate(-10, -10);
graphics.FillPie(Brushes.SteelBlue(generator), rect, 180 + 45, 270);
graphics.DrawImage(image, 101, 120, 100, 100);
}
Control CreateCustom32Alpha ()
{
var image = new Bitmap (100, 100, PixelFormat.Format32bppRgba);
// should always ensure .Dispose() is called when you are done with a Graphics object
using (var graphics = new Graphics (image)) {
graphics.DrawLine (Color.Blue, Point.Empty, new Point (image.Size));
graphics.DrawRectangle (Color.Black, new Rectangle (image.Size));
}
return new ImageView { Image = image };
}
/// <summary>
///
/// </summary>
/// <param name="gfx"></param>
/// <param name="pen"></param>
/// <param name="isStroked"></param>
/// <param name="p0"></param>
/// <param name="p1"></param>
private static void DrawLineInternal(
Graphics gfx,
Pen pen,
bool isStroked,
ref PointF p0,
ref PointF p1)
{
if (isStroked)
{
gfx.DrawLine(pen, p0, p1);
}
}
void Draw(Graphics g, Action<Pen> action)
{
var path = new GraphicsPath();
path.AddLines(new PointF(0, 0), new PointF(100, 40), new PointF(0, 30), new PointF(50, 70));
for (int i = 0; i < 4; i++)
{
float thickness = 1f + i * PenThickness;
var pen = new Pen(Colors.Black, thickness);
pen.LineCap = this.LineCap;
pen.LineJoin = this.LineJoin;
pen.DashStyle = this.DashStyle;
if (action != null)
action(pen);
var y = i * 20;
g.DrawLine(pen, 10, y, 110, y);
y = 80 + i * 50;
g.DrawRectangle(pen, 10, y, 100, 30);
y = i * 70;
g.DrawArc(pen, 140, y, 100, 80, 160, 160);
y = i * 70;
g.DrawEllipse(pen, 260, y, 100, 50);
g.SaveTransform();
y = i * 70;
g.TranslateTransform(400, y);
g.DrawPath(pen, path);
g.RestoreTransform();
}
}
void MatrixTests(Graphics g)
{
// test matrix RotateAt
DrawRotatedLines(g, Colors.SkyBlue, rotatedLineCenter, (center, angle) => {
var m = Matrix.Create();
m.RotateAt(angle, center);
g.MultiplyTransform(m);
});
// test matrix scale/translate/rotate
DrawRotatedLines(g, Colors.Salmon, rotatedLineCenter, (center, angle) => {
var m = Matrix.Create();
m.Translate(center);
m.Rotate(angle);
m.Translate(-center);
m.Scale(.4f);
g.MultiplyTransform(m);
});
// test rotating arcs
DrawRotatedArcs(g, Colors.LightBlue, rotatedLineCenter, (center, angle) => {
var m = Matrix.Create();
m.RotateAt(angle, center);
g.MultiplyTransform(m);
});
// test transformed text
DrawRotatedText(g, Colors.Lime, rotatedTextCenter, (center, angle) => {
var m = Matrix.Create();
m.RotateAt(angle, center - 40);
g.MultiplyTransform(m);
});
// test image drawing
{
g.SaveTransform();
g.MultiplyTransform(Matrix.FromScaleAt(new SizeF(1, -1), imageScaleLocation + image.Size / 2));
g.DrawImage(image, imageScaleLocation);
var m = Matrix.Create();
m.Translate(0, -50);
m.ScaleAt(0.3f, imageScaleLocation + image.Size / 2);
g.MultiplyTransform(m);
g.DrawImage(image, imageScaleLocation);
g.RestoreTransform();
}
// test skewing
{
g.SaveTransform();
var m = Matrix.Create();
m.Skew(20, 20);
g.MultiplyTransform(m);
var textSize = g.MeasureString(font, "Skewed Text");
g.DrawText(font, Colors.White, new PointF(110, 0), "Skewed Text");
g.DrawLine(Pens.White, 110, textSize.Height + 2, 110 + textSize.Width, textSize.Height + 2);
g.RestoreTransform();
}
// test more drawing operations
{
g.SaveTransform();
var m = Matrix.Create();
m.Translate(480, 20);
m.Scale(0.4f);
m.Rotate(90);
g.MultiplyTransform(m);
PixelOffsetSection.Draw(g);
g.RestoreTransform();
}
}
void DrawRotatedLines(Graphics g, Color color, PointF center, Action<PointF, float> action)
{
var pen = new Pen(color);
for (float i = 0; i < 360f; i += 10)
{
g.SaveTransform();
action(center, i);
g.DrawLine(pen, center, center + new Size(40, 0));
g.RestoreTransform();
}
}
void DirectTests(Graphics g)
{
// test translate/rotate
DrawRotatedLines(g, Colors.SkyBlue, rotatedLineCenter, (center, angle) => {
g.TranslateTransform(center);
g.RotateTransform(angle);
g.TranslateTransform(-center);
});
// test translate/rotate/scale
DrawRotatedLines(g, Colors.Salmon, rotatedLineCenter, (center, angle) => {
g.TranslateTransform(center);
g.RotateTransform(angle);
g.TranslateTransform(-center);
g.ScaleTransform(.4f);
});
// test rotating arcs
DrawRotatedArcs(g, Colors.LightBlue, rotatedLineCenter, (center, angle) => {
g.TranslateTransform(center);
g.RotateTransform(angle);
g.TranslateTransform(-center);
});
// test transformed text
DrawRotatedText(g, Colors.Lime, rotatedTextCenter, (center, angle) => {
g.TranslateTransform(center - 40);
g.RotateTransform(angle);
g.TranslateTransform(-center + 40);
});
// Test image drawing
g.SaveTransform();
g.TranslateTransform(imageScaleLocation + image.Size / 2);
g.ScaleTransform(1, -1);
g.TranslateTransform(-imageScaleLocation - image.Size / 2);
g.DrawImage(image, imageScaleLocation);
g.TranslateTransform(0, -50);
g.TranslateTransform(imageScaleLocation + image.Size / 2);
g.ScaleTransform(0.3f);
g.TranslateTransform(-imageScaleLocation - image.Size / 2);
g.DrawImage(image, imageScaleLocation);
g.RestoreTransform();
// test skewing
g.SaveTransform();
g.MultiplyTransform(Matrix.FromSkew(20, 20));
var textSize = g.MeasureString(font, "Skewed Text");
g.DrawText(font, Colors.White, new PointF(110, 0), "Skewed Text");
g.DrawLine(Pens.White, 110, textSize.Height + 2, 110 + textSize.Width, textSize.Height + 2);
g.RestoreTransform();
// test more drawing operations
g.SaveTransform();
g.TranslateTransform(480, 20);
g.ScaleTransform(0.4f);
g.RotateTransform(90);
PixelOffsetSection.Draw(g);
g.RestoreTransform();
}
/// <summary>
/// Draws a unit-length horizontal ruler from (0, 0) to (1, 0) into the graphics context.
/// Scale and rotate as needed before calling.
/// </summary>
/// <param name="g"></param>
static void DrawRuler(float length, Graphics g, Color color)
{
g.DrawLine(color, 0, 0, length, 0);
var capHeight = 2;
g.DrawLine(color, 0, -capHeight, 0, capHeight);
g.DrawLine(color, length, -capHeight, length, capHeight);
}
void DrawTest(Bitmap image)
{
// should always ensure .Dispose() is called when you are done with a Graphics or BitmapData object.
// Test setting pixels directly
using (var bd = image.Lock())
{
var sz = image.Size / 5;
for (int x = sz.Width; x < sz.Width * 2; x++)
for (int y = sz.Height; y < sz.Height * 2; y++)
bd.SetPixel(x, y, Colors.Green);
}
// Test using Graphics object
using (var graphics = new Graphics(image))
{
graphics.DrawLine(Pens.Blue, Point.Empty, new Point(image.Size));
graphics.DrawRectangle(Pens.Blue, new Rectangle(image.Size - 1));
}
// should be able to set pixels after using graphics object
using (var bd = image.Lock())
{
var sz = image.Size / 5;
for (int x = sz.Width * 3; x < sz.Width * 4; x++)
for (int y = sz.Height * 3; y < sz.Height * 4; y++)
bd.SetPixel(x, y, Colors.Red);
}
}
public static void Draw(Graphics graphics)
{
var image = TestIcons.TestImage;
// lines
var whitePen = new Pen(Colors.White, 1);
graphics.DrawLine(whitePen, 1, 1, 99, 99);
graphics.DrawLine(whitePen, 50, 1, 50, 99);
graphics.DrawLine(whitePen, 1, 51, 99, 51);
graphics.DrawRectangle(whitePen, 101, 1, 100, 100);
graphics.DrawRectangle(whitePen, 101, 1, 10, 10);
graphics.DrawEllipse(Pens.Green, 101, 1, 100, 100);
graphics.DrawPolygon(whitePen, new PointF(203, 1), new PointF(253, 51), new Point(203, 101), new PointF(203, 1), new PointF(253, 1), new PointF(253, 101), new PointF(203, 101));
var rect = new RectangleF(255, 1, 100, 100);
graphics.DrawArc(Pens.LightGreen, rect, 180, 90);
graphics.DrawArc(Pens.SkyBlue, rect, 0, 90);
rect.Inflate(-15, 0);
graphics.DrawArc(Pens.FloralWhite, rect, -45, 90);
rect.Inflate(-5, -20);
graphics.DrawArc(Pens.SlateGray, rect, -45, 270);
rect.Inflate(-10, -10);
graphics.DrawArc(Pens.SteelBlue, rect, 180 + 45, 270);
graphics.DrawImage(image, 100, 1, 100, 100);
graphics.DrawText(Fonts.Sans(12 * graphics.PointsPerPixel), Colors.White, 0, 104, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789");
// filled
graphics.FillRectangle(Brushes.White, 101, 120, 100, 100);
graphics.FillRectangle(Brushes.Gray, 101, 120, 10, 10);
graphics.FillEllipse(Brushes.Green, 101, 120, 100, 100);
graphics.FillPolygon(Brushes.White, new PointF(202, 120), new PointF(252, 170), new Point(202, 220), new PointF(202, 120));
rect = new RectangleF(255, 120, 100, 100);
graphics.FillPie(Brushes.LightGreen, rect, 180, 90);
graphics.FillPie(Brushes.SkyBlue, rect, 0, 90);
rect.Inflate(-15, 0);
graphics.FillPie(Brushes.FloralWhite, rect, -45, 90);
rect.Inflate(-5, -20);
graphics.FillPie(Brushes.SlateGray, rect, -45, 270);
rect.Inflate(-10, -10);
graphics.FillPie(Brushes.SteelBlue, rect, 180 + 45, 270);
graphics.DrawImage(image, 101, 120, 100, 100);
const int offset = 440;
var xoffset = offset;
var yoffset = 112;
for (int i = 1; i < 14; i++)
{
var pen = new Pen(Colors.White, i);
pen.LineCap = PenLineCap.Butt;
graphics.DrawLine(pen, xoffset, 1, xoffset, 110);
graphics.DrawLine(pen, offset, yoffset, offset + 100, yoffset);
xoffset += i + 2;
yoffset += i + 2;
}
}
private static void drawPaths(Graphics g, List<Path> paths, Func<PointF, PointF> pointTransform, float zoomFactor = 1.0f)
{
g.AntiAlias = false;
for (int i = 0; i < paths.Count; i++)
{
var path = paths[i];
for (int pointIdx = 0; pointIdx < (path.Points.Count - 1); pointIdx++)
{
var p1 = pointTransform(path.Points[pointIdx]);
var p2 = pointTransform(path.Points[pointIdx + 1]);
var pen = path.GetScaledPen(zoomFactor);
g.DrawLine(pen, p1, p2);
}
}
}