font-preview/FontPreview/UiTheme.cs

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace FontPreview
{
	/// <summary>
	/// 集中 UI 主题：颜色常量、字体、控件样式工厂。
	/// 所有界面颜色/样式统一从这里取，避免散落硬编码和重复写法。
	/// </summary>
	internal static class UiTheme
	{
		// ---- 颜色 ----
		public static readonly Color Primary = Color.FromArgb(43, 58, 85);       // 主深蓝
		public static readonly Color Accent = Color.FromArgb(98, 137, 200);       // 强调蓝（竖条/hover 边）
		public static readonly Color AccentText = Color.FromArgb(70, 110, 180);  // 字体名标签蓝
		public static readonly Color CardBg = Color.White;
		public static readonly Color PreviewBg = Color.FromArgb(245, 246, 248);    // 预览图浅灰底
		public static readonly Color PanelBg = Color.White;
		public static readonly Color Border = Color.FromArgb(226, 230, 235);
		public static readonly Color SubText = Color.Gray;

		// ---- 字体 ----
		public const string UiFontFamily = "Microsoft YaHei UI";
		public static readonly Font GroupLabel = new Font(UiFontFamily, 9.5f, FontStyle.Bold);
		public static readonly Font CardTitle = new Font(UiFontFamily, 11.5f, FontStyle.Bold);
		public static readonly Font StatusText = new Font(UiFontFamily, 8f);
		public static readonly Font UiBase = new Font(UiFontFamily, 9f);

		// ---- 圆角卡片 ----
		public const int CardRadius = 10;

		/// <summary>创建一张统一风格的圆角卡片面板。</summary>
		public static RoundPanel CreateCard(int width, int height)
		{
			RoundPanel p = new RoundPanel
			{
				Width = width,
				Height = height,
				BackColor = CardBg,
				Radius = CardRadius,
				BorderColor = Border,
				HoverBorder = Accent
			};
			return p;
		}

		/// <summary>卡片左侧的强调色竖条。</summary>
		public static Panel CreateAccentBar(int x, int y)
		{
			return new Panel { BackColor = Accent, Location = new Point(x, y), Size = new Size(4, 18) };
		}

		/// <summary>卡片标题字体名标签。</summary>
		public static Label CreateCardTitle(string text, int x, int y, int width)
		{
			return new Label
			{
				Text = text,
				Location = new Point(x, y),
				Size = new Size(width, 26),
				Font = CardTitle,
				ForeColor = AccentText,
				AutoEllipsis = true,
				Cursor = Cursors.Hand,
				BackColor = Color.Transparent
			};
		}

		/// <summary>卡片里的预览图 PictureBox（浅灰底、贴左）。</summary>
		public static PictureBox CreatePreviewBox(int x, int y, int width, int height)
		{
			return new PictureBox
			{
				Location = new Point(x, y),
				Size = new Size(width, height),
				BackColor = PreviewBg,
				SizeMode = PictureBoxSizeMode.Normal,
				Cursor = Cursors.Hand
			};
		}

		// ---- 按钮 ----
		/// <summary>主按钮：深蓝填充白字。</summary>
		public static Button CreatePrimaryButton(string text, int x, int y, int w, int h, EventHandler onClick)
		{
			Button b = new Button
			{
				Text = text,
				Location = new Point(x, y),
				Size = new Size(w, h),
				BackColor = Primary,
				ForeColor = Color.White,
				FlatStyle = FlatStyle.Flat,
				Cursor = Cursors.Hand
			};
			b.FlatAppearance.BorderSize = 0;
			if (onClick != null) b.Click += onClick;
			return b;
		}

		/// <summary>次要按钮：扁平白底。</summary>
		public static Button CreateSecondaryButton(string text, int x, int y, int w, int h, EventHandler onClick)
		{
			Button b = new Button
			{
				Text = text,
				Location = new Point(x, y),
				Size = new Size(w, h),
				FlatStyle = FlatStyle.Flat,
				Cursor = Cursors.Hand
			};
			if (onClick != null) b.Click += onClick;
			return b;
		}

		/// <summary>左侧分组小标题。</summary>
		public static Label CreateGroupLabel(string text, int x, int y, int w)
		{
			return new Label
			{
				Text = text,
				Location = new Point(x, y),
				Size = new Size(w, 20),
				Font = GroupLabel,
				ForeColor = Primary,
				BackColor = Color.Transparent
			};
		}

		/// <summary>主窗体应用主题：白底、统一字体。</summary>
		public static void ApplyForm(Form f)
		{
			f.BackColor = PanelBg;
			f.Font = UiBase;
		}
	}
}