// ===========================================================================
public override void Write(Stream stream)
{
// step 1
using (Document document = new Document()) {
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, stream);
// step 3
document.Open();
// step 4
PdfContentByte canvas = writer.DirectContent;
PdfShading axial = PdfShading.SimpleAxial(writer, 36, 716, 396,
788, BaseColor.ORANGE, BaseColor.BLUE
);
canvas.PaintShading(axial);
document.NewPage();
PdfShading radial = PdfShading.SimpleRadial(writer,
200, 700, 50, 300, 700, 100,
new BaseColor(0xFF, 0xF7, 0x94),
new BaseColor(0xF7, 0x8A, 0x6B),
false, false
);
canvas.PaintShading(radial);
PdfShadingPattern shading = new PdfShadingPattern(axial);
ColorRectangle(canvas, new ShadingColor(shading), 150, 420, 126, 126);
canvas.SetShadingFill(shading);
canvas.Rectangle(300, 420, 126, 126);
canvas.FillStroke();
}
}
public void Verify_ShadingPatternColor_CanBeCreated()
{
var pdfFilePath = TestUtils.GetOutputFileName();
var stream = new FileStream(pdfFilePath, FileMode.Create);
// step 1
var document = new Document();
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, stream);
// step 3
document.AddAuthor(TestUtils.Author);
document.Open();
// step 4
PdfContentByte canvas = writer.DirectContent;
PdfShading axial = PdfShading.SimpleAxial(writer, 36, 716, 396,
788, BaseColor.Orange, BaseColor.Blue
);
canvas.PaintShading(axial);
document.NewPage();
PdfShading radial = PdfShading.SimpleRadial(writer,
200, 700, 50, 300, 700, 100,
new BaseColor(0xFF, 0xF7, 0x94),
new BaseColor(0xF7, 0x8A, 0x6B),
false, false
);
canvas.PaintShading(radial);
PdfShadingPattern shading = new PdfShadingPattern(axial);
colorRectangle(canvas, new ShadingColor(shading), 150, 420, 126, 126);
canvas.SetShadingFill(shading);
canvas.Rectangle(300, 420, 126, 126);
canvas.FillStroke();
document.Close();
stream.Dispose();
TestUtils.VerifyPdfFileIsReadable(pdfFilePath);
}
public void CellLayout(PdfPCell cell, iTextSharp.text.Rectangle position, PdfContentByte[] canvases)
{
if (Helper.IsTransparent(_backgroundBrush))
position.BackgroundColor = null;
var gradientBrush = _backgroundBrush as GradientBrush;
if (gradientBrush != null)
{
PdfShading shading = null;
var fromColor = PdfPrinter.GetBaseColor(gradientBrush.GradientStops.FirstOrDefault().Color);
var toColor = PdfPrinter.GetBaseColor(gradientBrush.GradientStops.LastOrDefault().Color);
var linearGradientBrush = _backgroundBrush as LinearGradientBrush;
if (linearGradientBrush != null)
{
float x0, y0, x1, y1;
var brushSlopeAbs = Math.Abs(linearGradientBrush.EndPoint.Y - linearGradientBrush.StartPoint.Y) / Math.Abs(linearGradientBrush.EndPoint.X - linearGradientBrush.StartPoint.X);
var cellSlopeAbs = position.Height / position.Width;
if (linearGradientBrush.EndPoint.X > linearGradientBrush.StartPoint.X) // from left to right
{
x0 = position.Left;
if (linearGradientBrush.EndPoint.Y > linearGradientBrush.StartPoint.Y) // from top to bottom
{
y0 = position.Top;
if (cellSlopeAbs >= brushSlopeAbs)
{
x1 = position.Left + (float)(position.Height / brushSlopeAbs);
y1 = position.Bottom;
}
else
{
x1 = position.Right;
y1 = position.Top - (float)(position.Width * brushSlopeAbs);
}
}
else // from bottom to top
{
y0 = position.Bottom;
if (cellSlopeAbs >= brushSlopeAbs)
{
x1 = position.Left + (float)(position.Height / brushSlopeAbs);
y1 = position.Top;
}
else
{
x1 = position.Right;
y1 = position.Bottom + (float)(position.Width * brushSlopeAbs);
}
}
}
else // from right to left
{
x0 = position.Right;
if (linearGradientBrush.EndPoint.Y > linearGradientBrush.StartPoint.Y) // from top to bottom
{
y0 = position.Top;
if (cellSlopeAbs >= brushSlopeAbs)
{
x1 = position.Right - (float)(position.Height / brushSlopeAbs);
y1 = position.Bottom;
}
else
{
x1 = position.Right;
y1 = position.Top - (float)(position.Width * brushSlopeAbs);
}
}
else // from bottom to top
{
y0 = position.Bottom;
if (cellSlopeAbs >= brushSlopeAbs)
{
x1 = position.Right - (float)(position.Height / brushSlopeAbs);
y1 = position.Top;
}
else
{
x1 = position.Right;
y1 = position.Bottom + (float)(position.Width * brushSlopeAbs);
}
}
}
shading = PdfShading.SimpleAxial(_writer, x0, y0, x1, y1, fromColor, toColor, false, false);
}
var radialGradientBrush = _backgroundBrush as RadialGradientBrush;
if (radialGradientBrush != null)
{
float xCenter = 0, yCenter = 0, radius = 0;
shading = PdfShading.SimpleRadial(_writer, xCenter, yCenter, 0, xCenter, yCenter, radius, fromColor, toColor, true, true);
}
if (shading != null)
position.BackgroundColor = new ShadingColor(new PdfShadingPattern(shading));
}
//Fill the rectangle
canvases[PdfPTable.BACKGROUNDCANVAS].Rectangle(position);
}