nobobo
75 lines
2.4 KiB
C#
75 lines
2.4 KiB
C#
using DocumentFormat.OpenXml.Wordprocessing;
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using KssSmaPlaLib.Ini;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using Color = System.Drawing.Color;
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namespace KssSmaPlaLib.Forms
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{
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public static class ColorHelper
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{
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/// <summary>
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/// 色選択
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/// </summary>
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/// <param name="form"></param>
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/// <param name="defaultColor"></param>
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/// <param name="iniKey"></param>
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/// <returns></returns>
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public static Color? SelectColor(Form form, Color defaultColor, string iniKey = "")
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{
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using (ColorDialog cd = new ColorDialog())
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{
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// 今の色を初期選択にしておく
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cd.Color = defaultColor;
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if (cd.ShowDialog(form) != DialogResult.OK) return null;
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if (!string.IsNullOrEmpty(iniKey))
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{
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// 2. 🔥 Colorを16進数（#RRGGBB）に変換してINIに書き込み
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string colorHex = ColorTranslator.ToHtml(cd.Color);
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IniHelper.WriteValue(null, form.Name, iniKey, colorHex);
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}
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return cd.Color;
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}
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}
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/// <summary>
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/// Colorを汎用的なHTML色コード文字列に変換する
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/// </summary>
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/// <param name="color"></param>
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/// <returns></returns>
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public static string ColorToHtmlColorString(Color color)
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{
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return ColorTranslator.ToHtml(color);
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}
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/// <summary>
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/// 汎用的なHTML色コード文字列からColorに変換する
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/// </summary>
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/// <param name="htmlColorString"></param>
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/// <returns></returns>
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public static Color HtmlColorStringToColor(string htmlColorString)
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{
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return ColorTranslator.FromHtml(htmlColorString);
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}
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/// <summary>
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/// 背景色から最適な文字色(黒/白)を返すメソッド
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/// </summary>
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/// <param name="backColor"></param>
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/// <returns></returns>
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public static Color GetContrastColor(Color backColor)
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{
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// 輝度計算 (ITU-R BT.601)
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double luminance = (0.299 * backColor.R) + (0.587 * backColor.G) + (0.114 * backColor.B);
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return (luminance > 128) ? Color.Black : Color.White;
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}
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}
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}
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