SlantedTableHeaders.cs
// 完毕:
using System;
using System.IO;
using System.Drawing;
using System.Numerics;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Text;
using GrapeCity.Documents.Drawing;
using GCTEXT = GrapeCity.Documents.Text;
using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos.Basics
{
// This demo shows how to draw a table with slanted column headers,
// so that long headers can be squeezed into narrow columns' headers.
// The demo uses the GcGraphics.DrawSlantedText() method to draw the headers.
// See also the DrawRotatedText and DrawSlantedText demos.
public class SlantedTableHeaders
{
public int CreatePDF(Stream stream)
{
var doc = new GcPdfDocument();
var page = doc.Pages.Add();
var g = page.Graphics;
// This is just to better position the table in the page:
g.Transform = Matrix3x2.CreateTranslation(g.Resolution, g.Resolution);
var x = new float[] { 10, 70, 120, 170, 220, 270, 320, 370 };
var y = new float[] { 10, 70, 90, 110, 130 };
int lastX = x.Length - 1;
int lastY = y.Length - 1;
int angle = -50;
float dx = (y[0] - y[1]) / (float)Math.Tan(Math.PI * angle / 180);
using (var path = g.CreatePath())
{
path.BeginFigure(new PointF(x[1] + dx, y[0]));
path.AddLine(new PointF(x[lastX] + dx, y[0]));
path.AddLine(new PointF(x[lastX], y[1]));
path.AddLine(new PointF(x[1], y[1]));
path.EndFigure(FigureEnd.Closed);
g.FillPath(path, Color.Bisque);
}
DrawLine(g, x[1] + dx, y[0], x[lastX] + dx, y[0]);
for (int i = 1; i <= lastX; i++)
DrawLine(g, x[i], y[1], x[i] + dx, y[0]);
var arrH = new string[] { "January", "February", "March", "April", "May", "June" };
for (int i = 1; i < lastX; i++)
DrawSlantedText(g, angle, x[i], y[0], x[i + 1], y[1], arrH[i - 1]);
for (int i = 1; i <= lastY; i++)
DrawLine(g, x[0], y[i], x[lastX], y[i]);
for (int i = 0; i <= lastX; i++)
DrawLine(g, x[i], y[1], x[i], y[lastY]);
var arr1 = new string[] { "Store 1", "83424", "13558", "2348", "6429", "7565", "2833" };
var arr2 = new string[] { "Store 2", "53423", "3573", "32321", "16474", "97553", "8364" };
var arr3 = new string[] { "Store 3", "3421", "83553", "2343", "6428", "77557", "8347" };
bool bold = true;
for (int i = 0; i < lastX; i++)
{
DrawText(g, y[1], x[i], x[i + 1], arr1[i], bold);
DrawText(g, y[2], x[i], x[i + 1], arr2[i], bold);
DrawText(g, y[3], x[i], x[i + 1], arr3[i], bold);
bold = false;
}
// 完毕:
doc.Save(stream);
return doc.Pages.Count;
}
static void DrawLine(GcGraphics g, float x1, float y1, float x2, float y2)
{
g.DrawLine(new PointF(x1, y1), new PointF(x2, y2), new GCDRAW::Pen(Color.Gray, 1));
}
static void DrawSlantedText(GcGraphics g, int angle, float x1, float y1, float x2, float y2, string s)
{
var tl = g.CreateTextLayout();
tl.TextAlignment = TextAlignment.Center;
tl.Append(s, new TextFormat
{
FontName = "Segoe UI",
FontSize = 10,
FontBold = true
});
var rc = new RectangleF(x1, y1, x2 - x1, y2 - y1);
g.DrawSlantedText(tl, angle, false, rc, SlantedTextAlignment.CenterInsideOutside);
}
static void DrawText(GcGraphics g, float y1, float x1, float x2, string s, bool bold = false)
{
var tl = g.CreateTextLayout();
tl.TextAlignment = bold ? TextAlignment.Leading : TextAlignment.Trailing;
tl.MaxWidth = x2 - x1 - 6;
tl.Append(s, new TextFormat
{
FontName = "Segoe UI",
FontSize = 10,
FontBold = bold
});
g.DrawTextLayout(tl, new PointF(x1 + 3, y1));
}
}
}