DrawSlantedText.cs
// 完毕：
using System;
using System.IO;
using System.Drawing;
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 illustrates the results of using the GcGraphics.DrawSlantedText() method
// with different combinations of arguments.
// The DrawSlantedText() method draws text slanted within a specified rectangle
// similar to how rotated text is drawn in MS Excel cells with borders.
// See also the DrawRotatedText demo.
public class DrawSlantedText
{
public int CreatePDF(Stream stream)
{
var doc = new GcPdfDocument();
var page = doc.Pages.Add();
var g = page.Graphics;
// Set up some values to manage layout:
var gap = g.Resolution;
var w = page.Size.Width / 3;
var h = w;
// Various text alignments with SlantedTextAlignment.BelowRotatedInside:
Draw(g, q0(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Leading);
Draw(g, q1(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Trailing);
Draw(g, q2(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Center);
Draw(g, q3(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Distributed);
// Various text alignments with SlantedTextAlignment.BelowRotatedOutside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Leading);
Draw(g, q1(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Trailing);
Draw(g, q2(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Center);
Draw(g, q3(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Distributed);
// Various text alignments with SlantedTextAlignment.AboveRotatedInside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Leading);
Draw(g, q1(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Trailing);
Draw(g, q2(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Center);
Draw(g, q3(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Distributed);
// Various text alignments with SlantedTextAlignment.AboveRotatedOutside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Leading);
Draw(g, q1(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Trailing);
Draw(g, q2(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Center);
Draw(g, q3(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Distributed);
// Various text alignments with SlantedTextAlignment.CenterInsideOutside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Leading);
Draw(g, q1(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Trailing);
Draw(g, q2(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Center);
Draw(g, q3(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Distributed);
// Various text alignments with SlantedTextAlignment.CenterOutsideInside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Leading);
Draw(g, q1(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Trailing);
Draw(g, q2(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Center);
Draw(g, q3(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Distributed);
// Examples with positive rotation angle using SlantedTextAlignment.BelowRotatedInside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Leading);
Draw(g, q1(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Trailing);
Draw(g, q2(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Center);
Draw(g, q3(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Distributed);
// Examples with positive rotation angle using SlantedTextAlignment.AboveRotatedInside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Leading);
Draw(g, q1(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Trailing);
Draw(g, q2(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Center);
Draw(g, q3(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Distributed);
// Below are examples of vertically stacked text.
// Vertically stacked text rotated to a negative angle using SlantedTextAlignment.BelowRotatedInside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Leading);
Draw(g, q1(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Trailing);
Draw(g, q2(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Center);
Draw(g, q3(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Distributed);
// Vertically stacked text rotated to a negative angle using SlantedTextAlignment.BelowRotatedOutside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Leading);
Draw(g, q1(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Trailing);
Draw(g, q2(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Center);
Draw(g, q3(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Distributed);
// Vertically stacked text rotated to a positive angle using SlantedTextAlignment.AboveRotatedOutside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Leading);
Draw(g, q1(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Trailing);
Draw(g, q2(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Center);
Draw(g, q3(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Distributed);
// Vertically stacked text rotated to a positive angle using SlantedTextAlignment.CenterOutsideInside:
page = doc.Pages.Add();
g = page.Graphics;
Draw(g, q0(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Leading);
Draw(g, q1(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Trailing);
Draw(g, q2(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Center);
Draw(g, q3(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Distributed);
// 完毕：
doc.Save(stream);
return doc.Pages.Count;
RectangleF q0()
{
return new RectangleF(gap, gap, w, h);
}
RectangleF q1()
{
return new RectangleF(gap + w + gap, gap, w, h);
}
RectangleF q2()
{
return new RectangleF(gap, gap + h + gap, w, h);
}
RectangleF q3()
{
return new RectangleF(gap + w + gap, gap + h + gap, w, h);
}
}
static void Draw(GcGraphics g, RectangleF rect, int angle, bool verticalStacking,
SlantedTextAlignment slantedAlign, TextAlignment textAlign)
{
// Draw a legend stating the current DrawRotatedText arguments' values:
var tlLegend = g.CreateTextLayout();
tlLegend.DefaultFormat.FontName = "Calibri";
tlLegend.DefaultFormat.FontSize = 9;
tlLegend.AppendLine($"Rotation angle: {angle}°");
tlLegend.AppendLine($"Text alignment: {textAlign}");
tlLegend.AppendLine($"Slanted text alignment: {slantedAlign}");
tlLegend.AppendLine($"Is vertical stacking: {verticalStacking}");
g.DrawTextLayout(tlLegend, rect.Location);
// The target rectangle for the DrawRotatedText call:
var d = tlLegend.ContentHeight + g.Resolution;
rect.Y += d;
rect.Height -= d;
rect.Width -= d / 2;
var x = rect.X;
var y = rect.Y;
var w = rect.Width;
var h = rect.Height;
// Draw the target rectangle:
g.DrawRectangle(rect, new GCDRAW::Pen(Color.PaleGreen, 3));
if (!verticalStacking)
{
float dx = (float)(h / Math.Tan(Math.PI * angle / -180.0));
switch (slantedAlign)
{
case SlantedTextAlignment.BelowRotatedInside:
case SlantedTextAlignment.AboveRotatedOutside:
case SlantedTextAlignment.CenterInsideOutside:
g.DrawPolygon(new[] {
new PointF(x + dx, y), new PointF(x + dx + w, y),
new PointF(x + w, y + h), new PointF(x, y + h)},
new GCDRAW::Pen(Color.Red, 1));
break;
case SlantedTextAlignment.BelowRotatedOutside:
case SlantedTextAlignment.AboveRotatedInside:
case SlantedTextAlignment.CenterOutsideInside:
g.DrawPolygon(new[] {
new PointF(x, y), new PointF(x + w, y),
new PointF(x - dx + w, y + h), new PointF(x - dx, y + h)},
new GCDRAW::Pen(Color.Red, 1));
break;
}
}
else
{
float dy = (float)(w * Math.Tan(Math.PI * angle / 180.0));
switch (slantedAlign)
{
case SlantedTextAlignment.BelowRotatedInside:
case SlantedTextAlignment.AboveRotatedOutside:
case SlantedTextAlignment.CenterInsideOutside:
if (angle >= 0)
g.DrawPolygon(new[] {
new PointF(x, y), new PointF(x + w, y + dy), new PointF(x + w, y + dy + h), new PointF(x, y + h)},
new GCDRAW::Pen(Color.Red, 1));
else
g.DrawPolygon(new[] {
new PointF(x, y - dy), new PointF(x + w, y), new PointF(x + w, y + h), new PointF(x, y - dy + h)},
new GCDRAW::Pen(Color.Red, 1));
break;
case SlantedTextAlignment.BelowRotatedOutside:
case SlantedTextAlignment.AboveRotatedInside:
case SlantedTextAlignment.CenterOutsideInside:
if (angle >= 0)
g.DrawPolygon(new[] {
new PointF(x, y - dy), new PointF(x + w, y), new PointF(x + w, y + h), new PointF(x, y - dy + h)},
new GCDRAW::Pen(Color.Red, 1));
else
g.DrawPolygon(new[] {
new PointF(x, y), new PointF(x + w, y + dy), new PointF(x + w, y + dy + h), new PointF(x, y + h)},
new GCDRAW::Pen(Color.Red, 1));
break;
}
}
// Draw slanted text:
var tl = g.CreateTextLayout();
tl.DefaultFormat.FontName = "Calibri";
tl.DefaultFormat.FontSize = 12;
tl.TextAlignment = textAlign;
tl.Append("The quick brown fox jumps over the lazy dog. ");
tl.Append("The quick brown fox jumps over the lazy dog.");
g.DrawSlantedText(tl, angle, verticalStacking, rect, slantedAlign);
}
}
}