DrawRotatedText.cs
- //
- // This code is part of Document Solutions for Imaging demos.
- // Copyright (c) MESCIUS inc. All rights reserved.
- //
- using System;
- using System.IO;
- using System.Drawing;
- using System.Collections.Generic;
- using System.Linq;
- using GrapeCity.Documents.Drawing;
- using GrapeCity.Documents.Text;
- using GrapeCity.Documents.Imaging;
- using GCTEXT = GrapeCity.Documents.Text;
- using GCDRAW = GrapeCity.Documents.Drawing;
-
- namespace DsImagingWeb.Demos
- {
- // This demo illustrates the results of using the GcGraphics.DrawRotatedText() method
- // with different combinations of arguments.
- // The DrawRotatedText() method draws text rotated within a specified rectangle
- // similar to how rotated text is drawn in MS Excel cells without borders.
- // See also the DrawSlantedText_0 demo.
- public class DrawRotatedText
- {
- static string[] s_names = new []
- {
- "Rotate Counter-clockwise",
- "Rotate Clockwise",
- "Vertical Stacking",
- "Varying RotatedTextAlignment",
- "Vertical Stacking Align",
- "Horizontal Stacking Align",
- };
-
- public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)
- {
- sampleParams ??= GetSampleParamsList()[0];
-
- var bmp = new GcBitmap(pixelSize.Width, pixelSize.Height, opaque, dpi, dpi);
- using var g = bmp.CreateGraphics(Color.White);
- // Set up some values to manage layout:
- var margin = g.Resolution;
- var gap = g.Resolution;
- var w = pixelSize.Width * 0.3f;
- var h = w;
-
- if (sampleParams[0] == s_names[0])
- {
- // Draw text at different negative angles:
- Draw(g, q0(), angle: -90, false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- Draw(g, q1(), angle: -60, false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- Draw(g, q2(), angle: -45, false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- Draw(g, q3(), angle: -30, false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- }
- else if (sampleParams[0] == s_names[1])
- {
- // Draw text at different positive angles:
- Draw(g, q0(), angle: -90, false, RotatedTextAlignment.TopRight, TextAlignment.Leading);
- Draw(g, q1(), angle: -60, false, RotatedTextAlignment.TopRight, TextAlignment.Leading);
- Draw(g, q2(), angle: -45, false, RotatedTextAlignment.TopRight, TextAlignment.Leading);
- Draw(g, q3(), angle: -30, false, RotatedTextAlignment.TopRight, TextAlignment.Leading);
- }
- else if (sampleParams[0] == s_names[2])
- {
- // Draw text using different vertical stacking:
- Draw(g, q0(), angle: -30, verticalStacking: true, RotatedTextAlignment.TopRight, TextAlignment.Trailing);
- Draw(g, q1(), angle: -30, verticalStacking: false, RotatedTextAlignment.TopRight, TextAlignment.Trailing);
- Draw(g, q2(), angle: -30, verticalStacking: false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- Draw(g, q3(), angle: -30, verticalStacking: true, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- }
- else if (sampleParams[0] == s_names[3])
- {
- // RotatedTextAlignment affects the location of text (red) within the target rectangle (green):
- Draw(g, q0(), angle: -30, verticalStacking: true, RotatedTextAlignment.TopRight, TextAlignment.Trailing);
- Draw(g, q1(), angle: 60, verticalStacking: false, RotatedTextAlignment.BottomRight, TextAlignment.Trailing);
- Draw(g, q2(), angle: 30, verticalStacking: true, RotatedTextAlignment.TopLeft, TextAlignment.Leading);
- Draw(g, q3(), angle: -60, verticalStacking: false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- }
- else if (sampleParams[0] == s_names[4])
- {
- // Draw vertically stacked text using different TextAlignment values:
- Draw(g, q0(), angle: 30, verticalStacking: true, RotatedTextAlignment.TopLeft, TextAlignment.Leading);
- Draw(g, q1(), angle: 30, verticalStacking: true, RotatedTextAlignment.TopLeft, TextAlignment.Trailing);
- Draw(g, q2(), angle: 30, verticalStacking: true, RotatedTextAlignment.TopLeft, TextAlignment.Center);
- Draw(g, q3(), angle: 30, verticalStacking: true, RotatedTextAlignment.TopLeft, TextAlignment.Distributed);
- }
- else if (sampleParams[0] == s_names[5])
- {
- // Draw horizontally stacked text using different TextAlignment values:
- Draw(g, q0(), angle: -70, verticalStacking: false, RotatedTextAlignment.BottomLeft, TextAlignment.Leading);
- Draw(g, q1(), angle: -70, verticalStacking: false, RotatedTextAlignment.BottomLeft, TextAlignment.Trailing);
- Draw(g, q2(), angle: -70, verticalStacking: false, RotatedTextAlignment.BottomLeft, TextAlignment.Center);
- Draw(g, q3(), angle: -70, verticalStacking: false, RotatedTextAlignment.BottomLeft, TextAlignment.Distributed);
- }
- return bmp;
-
- RectangleF q0()
- {
- return new RectangleF(margin, margin, w, h);
- }
- RectangleF q1()
- {
- return new RectangleF(pixelSize.Width - margin - w, margin, w, h);
- }
- RectangleF q2()
- {
- return new RectangleF(margin, margin + h + gap, w, h);
- }
- RectangleF q3()
- {
- return new RectangleF(pixelSize.Width - margin - w, margin + h + gap, w, h);
- }
- }
-
- static void Draw(GcGraphics g, RectangleF rect, int angle, bool verticalStacking,
- RotatedTextAlignment rotatedAlign, 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($"Rotated text alignment: {rotatedAlign}");
- tlLegend.AppendLine($"Is vertical stacking: {verticalStacking}");
- g.DrawTextLayout(tlLegend, rect.Location);
-
- // The target rectangle for the DrawRotatedText call:
- var d = tlLegend.ContentHeight + 12;
- rect.Y += d;
- rect.Height -= d;
-
- var tl = g.CreateTextLayout();
- tl.DefaultFormat.FontName = "Calibri";
- tl.DefaultFormat.FontSize = 12;
- tl.Append("The quick brown fox jumps over the lazy dog. ");
- tl.Append("The quick brown fox jumps over the lazy dog.");
- tl.TextAlignment = textAlign;
- // Draw rotated text:
- g.DrawRotatedText(tl, angle, verticalStacking, rect, rotatedAlign);
-
- // Outline the target rectangle in green:
- g.DrawRectangle(rect, new GCDRAW::Pen(Color.PaleGreen, 3));
- // Outline the actual text rectangle in red:
- var tlCopy = tl.Clone(true);
- var tlRect = g.MeasureRotatedText(tlCopy, angle, verticalStacking, rect, rotatedAlign);
- g.DrawRectangle(tlRect, new GCDRAW::Pen(Color.Red, 1));
- }
-
- public static List<string[]> GetSampleParamsList()
- {
- return new List<string[]>()
- {
- // Strings are name, description, info. Rest are arbitrary strings:
- new string[] { s_names[0], "Draw rotated text at different negative angles", null},
- new string[] { s_names[1], "Draw rotated text at different positive angles", null},
- new string[] { s_names[2], "Draw rotated text using different vertical stacking", null},
- new string[] { s_names[3], "Draw text using different rotated text alignments", null},
- new string[] { s_names[4], "Draw vertically stacked text using different TextAlignment values", null},
- new string[] { s_names[5], "Draw horizontally stacked text using different TextAlignment values", null, },
- };
- }
- }
- }
-