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- using FastReport.Utils;
- using System;
- using System.Collections;
- using System.Drawing;
- using System.Drawing.Drawing2D;
- namespace FastReport
- {
- /// <summary>
- /// Represents a cache of graphics objects such as pens, brushes, fonts and text formats.
- /// </summary>
- /// <remarks>
- /// Cache holds all used graphics objects. There is no need to dispose objects returned
- /// by GetXXX calls.
- /// </remarks>
- /// <example>This example demonstrates how to use graphic cache.
- /// <code>
- /// public void Draw(FRPaintEventArgs e)
- /// {
- /// Brush brush = e.Cache.GetBrush(BackColor);
- /// Pen pen = e.Cache.GetPen(BorderColor, 1, BorderStyle);
- /// e.Graphics.FillRectangle(brush, Bounds);
- /// e.Graphics.DrawRectangle(pen, Bounds);
- /// }
- /// </code>
- /// </example>
- public class GraphicCache : IDisposable
- {
- private Hashtable pens;
- private Hashtable brushes;
- private Hashtable fonts;
- private Hashtable stringFormats;
- /// <summary>
- /// Gets a pen with specified settings.
- /// </summary>
- /// <param name="color">Color of a pen.</param>
- /// <param name="width">Width of a pen.</param>
- /// <param name="style">Dash style of a pen.</param>
- /// <returns>The <b>Pen</b> object.</returns>
- public Pen GetPen(Color color, float width, DashStyle style)
- {
- return GetPen(color, width, style, LineJoin.Miter);
- }
- /// <summary>
- /// Gets a pen with specified settings.
- /// </summary>
- /// <param name="color">Color of a pen.</param>
- /// <param name="width">Width of a pen.</param>
- /// <param name="style">Dash style of a pen.</param>
- /// <param name="lineJoin">Line join of a pen.</param>
- /// <returns>The <b>Pen</b> object.</returns>
- public Pen GetPen(Color color, float width, DashStyle style, LineJoin lineJoin)
- {
- int hash = color.GetHashCode() ^ width.GetHashCode() ^ style.GetHashCode() ^ lineJoin.GetHashCode();
- Pen result = pens[hash] as Pen;
- if (result == null)
- {
- result = new Pen(color, width);
- result.DashStyle = style;
- result.LineJoin = lineJoin;
- pens[hash] = result;
- }
- return result;
- }
- /// <summary>
- /// Gets a brush with specified color.
- /// </summary>
- /// <param name="color">Color of a brush.</param>
- /// <returns>The <b>SolidBrush</b> object.</returns>
- public SolidBrush GetBrush(Color color)
- {
- int hash = color.GetHashCode();
- SolidBrush result = brushes[hash] as SolidBrush;
- if (result == null)
- {
- result = new SolidBrush(color);
- brushes[hash] = result;
- }
- return result;
- }
- /// <summary>
- /// Gets a font with specified settings.
- /// </summary>
- /// <param name="name">Family of a font.</param>
- /// <param name="size">Size of a font.</param>
- /// <param name="style">Style of a font.</param>
- /// <returns>The <b>Font</b> object.</returns>
- public Font GetFont(FontFamily name, float size, FontStyle style)
- {
- int hash = name.GetHashCode() ^ size.GetHashCode() ^ style.GetHashCode();
- Font result = fonts[hash] as Font;
- if (result == null)
- {
- result = new Font(name, size, style);
- fonts[hash] = result;
- }
- return result;
- }
- /// <summary>
- /// Gets a string format with specified settings.
- /// </summary>
- /// <param name="align">Text alignment information on the vertical plane.</param>
- /// <param name="lineAlign">Line alignment on the horizontal plane.</param>
- /// <param name="trimming"><b>StringTrimming</b> enumeration.</param>
- /// <param name="flags"><b>StringFormatFlags</b> enumeration that contains formatting information.</param>
- /// <param name="firstTab">The number of spaces between the beginning of a line of text and the first tab stop.</param>
- /// <param name="tabWidth">Distance between tab stops.</param>
- /// <returns>The <b>StringFormat</b> object.</returns>
- public StringFormat GetStringFormat(StringAlignment align, StringAlignment lineAlign,
- StringTrimming trimming, StringFormatFlags flags, float firstTab, float tabWidth)
- {
- int hash = align.GetHashCode() ^ (lineAlign.GetHashCode() << 2) ^ (trimming.GetHashCode() << 5) ^
- (flags.GetHashCode() << 16) ^ (100 - firstTab).GetHashCode() ^ tabWidth.GetHashCode();
- StringFormat result = stringFormats[hash] as StringFormat;
- if (result == null)
- {
- result = new StringFormat();
- result.Alignment = align;
- result.LineAlignment = lineAlign;
- result.Trimming = trimming;
- result.FormatFlags = flags;
- float[] tabStops = new float[64];
- // fixed issue 2823
- tabStops[0] = firstTab;
- for (int i = 1; i < 64; i++)
- {
- tabStops[i] = tabWidth;
- }
- result.SetTabStops(0, tabStops);
- stringFormats[hash] = result;
- }
- return result;
- }
- /// <summary>
- /// Gets a string format with specified settings.
- /// </summary>
- /// <param name="align">Text alignment information on the vertical plane.</param>
- /// <param name="lineAlign">Line alignment on the horizontal plane.</param>
- /// <param name="trimming"><b>StringTrimming</b> enumeration.</param>
- /// <param name="flags"><b>StringFormatFlags</b> enumeration that contains formatting information.</param>
- /// <param name="firstTab">The number of spaces between the beginning of a line of text and the first tab stop.</param>
- /// <param name="tabWidth">Distance between tab stops.</param>
- /// <param name="defaultTab">Default distance between default tabs stops.</param>
- /// <returns>The <b>StringFormat</b> object.</returns>
- public StringFormat GetStringFormat(StringAlignment align, StringAlignment lineAlign,
- StringTrimming trimming, StringFormatFlags flags, float firstTab, FloatCollection tabWidth,
- float defaultTab = 48)
- {
- int hash = align.GetHashCode() ^ (lineAlign.GetHashCode() << 2) ^ (trimming.GetHashCode() << 5) ^
- (flags.GetHashCode() << 16) ^ (100 - firstTab).GetHashCode() ^ tabWidth.GetHashCode();
- StringFormat result = stringFormats[hash] as StringFormat;
- if (result == null)
- {
- result = new StringFormat();
- result.Alignment = align;
- result.LineAlignment = lineAlign;
- result.Trimming = trimming;
- result.FormatFlags = flags;
- float[] tabStops = new float[64];
- // fixed issue 2823
- tabStops[0] = firstTab;
- for (int i = 1; i < 64; i++)
- {
- if (i > tabWidth.Count)
- {
- tabStops[i] = defaultTab;
- continue;
- }
- tabStops[i] = tabWidth[i - 1];
- }
- result.SetTabStops(0, tabStops);
- stringFormats[hash] = result;
- }
- return result;
- }
- /// <summary>
- /// Disposes resources used by this object.
- /// </summary>
- public void Dispose()
- {
- foreach (Pen pen in pens.Values)
- {
- pen.Dispose();
- }
- foreach (Brush brush in brushes.Values)
- {
- brush.Dispose();
- }
- foreach (Font font in fonts.Values)
- {
- font.Dispose();
- }
- foreach (StringFormat format in stringFormats.Values)
- {
- format.Dispose();
- }
- pens.Clear();
- brushes.Clear();
- fonts.Clear();
- stringFormats.Clear();
- }
- /// <summary>
- /// Initializes a new instance of the <b>GraphicCache</b> class with default settings.
- /// </summary>
- public GraphicCache()
- {
- pens = new Hashtable();
- brushes = new Hashtable();
- fonts = new Hashtable();
- stringFormats = new Hashtable();
- }
- }
- }
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