mattercontrol/MatterControlLib/ConfigurationPage/ApplicationSettings/ThemeColorPanel.cs

/*
Copyright (c) 2018, Kevin Pope, John Lewin
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
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   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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of the authors and should not be interpreted as representing official policies,
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*/

using System;
using System.Collections.Generic;
using System.Linq;
using MatterHackers.Agg;
using MatterHackers.Agg.Image;
using MatterHackers.Agg.Platform;
using MatterHackers.Agg.UI;
using MatterHackers.Agg.VertexSource;
using MatterHackers.MatterControl.CustomWidgets;
using MatterHackers.MatterControl.Library;
using MatterHackers.MatterControl.PartPreviewWindow;
using MatterHackers.VectorMath;

namespace MatterHackers.MatterControl.ConfigurationPage
{
	public class ThemeColorPanel : FlowLayoutWidget
	{
		private readonly AccentColorsWidget colorSelector;
		private readonly ThemeConfig theme;
		private IColorTheme _themeProvider;
		private readonly GuiWidget previewButtonPanel;

		public ThemeColorPanel(ThemeConfig theme, AccentColorsWidget colorSelector)
			: base (FlowDirection.TopToBottom)
		{
			this.colorSelector = colorSelector;
			this.theme = theme;

			string currentProviderName = UserSettings.Instance.get(UserSettingsKey.ThemeName) ?? "";

			if (AppContext.ThemeProviders.TryGetValue(currentProviderName, out IColorTheme currentProvider))
			{
				_themeProvider = currentProvider;
			}
			else
			{
				_themeProvider = AppContext.ThemeProviders.Values.First();
			}

			this.SelectionColor = theme.MinimalShade;

			this.AddChild(previewButtonPanel = new FlowLayoutWidget()
			{
				HAnchor = HAnchor.Stretch,
				VAnchor = VAnchor.Fit,
				//BackgroundColor = activeTheme.MinimalShade
			});

			this.CreateThemeModeButtons();
		}

		public ImageBuffer CheckMark { get; } = StaticData.Instance.LoadIcon("fa-check_16.png", 16, 16, invertImage: true);

		public Color SelectionColor { get; private set; }

		public IColorTheme ThemeProvider
		{
			get => _themeProvider;
			set
			{
				_themeProvider = value;

				colorSelector.RebuildColorButtons();

				this.CreateThemeModeButtons();
			}
		}

		private void CreateThemeModeButtons()
		{
			previewButtonPanel.CloseChildren();

			int providerIndex = 0;

			foreach (var provider in AppContext.ThemeProviders.Values)
			{
				if (providerIndex > 0)
				{
					previewButtonPanel.AddChild(new VerticalLine()
					{
						BackgroundColor = theme.MinimalShade,
						Margin = new BorderDouble(0, theme.DefaultContainerPadding),
					});
				}

				foreach (var themeName in provider.ThemeNames)
				{
					var previewContainer = new GuiWidget()
					{
						HAnchor = HAnchor.Fit | HAnchor.Left,
						VAnchor = VAnchor.Fit | VAnchor.Center,
					};
					previewButtonPanel.AddChild(previewContainer);

					ThemeSet themeset;

					if (themeName == AppContext.ThemeSet.ThemesetID)
					{
						previewContainer.BackgroundColor = theme.MinimalShade;
						themeset = AppContext.ThemeSet;
					}
					else
					{
						themeset = provider.GetTheme(themeName);
					}

					var previewColumn = new FlowLayoutWidget(FlowDirection.TopToBottom);
					previewContainer.AddChild(previewColumn);

					previewColumn.AddChild(new ThemePreviewButton(themeset, this)
					{
						HAnchor = HAnchor.Absolute,
						VAnchor = VAnchor.Absolute,
						Width = 80 * GuiWidget.DeviceScale,
						Height = 65 * GuiWidget.DeviceScale,
						Border = 1,
						BorderColor = theme.BorderColor20,
						Margin = new BorderDouble(theme.DefaultContainerPadding, 0, theme.DefaultContainerPadding, theme.DefaultContainerPadding)
					});

					string name = themeset.Name;
					if (string.IsNullOrEmpty(name))
					{
						name = themeset.ThemesetID.Replace("-", " ");
					}

					previewColumn.AddChild(new TextWidget(name, pointSize: theme.FontSize7, textColor: theme.TextColor)
					{
						HAnchor = HAnchor.Left,
						Margin = new BorderDouble(12, 2)
					});

					if (themeName == AppContext.ThemeSet.ThemesetID)
					{
						var imageSize = (int)(35 * GuiWidget.DeviceScale);
						var imageBuffer = new ImageBuffer(imageSize, imageSize);
						var graphics = imageBuffer.NewGraphics2D();

						previewContainer.BorderColor = AppContext.Theme.AccentMimimalOverlay;
						previewContainer.Border = 1;

						var arrowHeight = 35 * GuiWidget.DeviceScale;

						var upArrow = new VertexStorage();
						upArrow.MoveTo(0, 0);
						upArrow.LineTo(arrowHeight, 0);
						upArrow.LineTo(0, -arrowHeight);
						upArrow.LineTo(0, 0);

						graphics.Render(upArrow, new Vector2(0, 35 * GuiWidget.DeviceScale), AppContext.Theme.PrimaryAccentColor);
						graphics.Render(this.CheckMark, 4 * GuiWidget.DeviceScale, 17 * GuiWidget.DeviceScale);

						imageBuffer.SetPreMultiply();

						previewContainer.AddChild(new ImageWidget(imageBuffer, false)
						{
							HAnchor = HAnchor.Left,
							VAnchor = VAnchor.Top,
						});
					}
				}

				providerIndex++;
			}
		}

		public void PreviewTheme(Color sourceAccentColor)
		{
			var previewButton = previewButtonPanel.Descendants<ThemePreviewButton>().FirstOrDefault(t => t.ThemeSet.ThemesetID == AppContext.ThemeSet.ThemesetID);
			if (previewButton != null)
			{
				previewButton.PreviewThemeColor(sourceAccentColor);
			}
		}

		public void SetThemeColor(ThemeSet themeSet, Color accentColor)
		{
			if (colorSelector != null)
			{
				foreach (var colorButton in colorSelector.ColorButtons)
				{
					colorButton.BorderColor = (colorButton.SourceColor == accentColor) ? Color.White : Color.Transparent;
				}
			}

			themeSet.Theme.PrimaryAccentColor = accentColor;
			themeSet.Theme.AccentMimimalOverlay = accentColor.WithAlpha(90);

			AppContext.SetTheme(themeSet);

			previewButtonPanel.BackgroundColor = this.SelectionColor;
		}

		public class AccentColorsWidget : FlowLayoutWidget
		{
			private readonly int containerHeight;
			private readonly int buttonSpacing;
			private readonly List<ColorButton> colorButtons = new();
			private readonly ThemeSet themeSet;

			public AccentColorsWidget(ThemeSet themeSet, int buttonHeight = 18, int buttonSpacing = 3)
			{
				this.themeSet = themeSet;
				this.Margin = new BorderDouble(left: buttonSpacing);
				this.buttonSpacing = buttonSpacing;

				containerHeight = (int)(buttonHeight * GuiWidget.DeviceScale);

				this.RebuildColorButtons();
			}

			public IEnumerable<ColorButton> ColorButtons => colorButtons;

			public ThemeColorPanel ThemeColorPanel { get; set; }

			public void RebuildColorButtons()
			{
				this.CloseChildren();

				colorButtons.Clear();

				bool firstItem = true;

				foreach (var color in themeSet.AccentColors)
				{
					var colorButton = this.CreateThemeButton(color);
					colorButton.Width = containerHeight;

					colorButtons.Add(colorButton);

					if (firstItem)
					{
						firstItem = false;
						colorButton.Margin = colorButton.Margin.Clone(left: 0);
					}

					this.AddChild(colorButton);
				}
			}

			public ColorButton CreateThemeButton(Color color)
			{
				var colorButton = new ColorButton(color)
				{
					Cursor = Cursors.Hand,
					Width = containerHeight,
					Height = containerHeight,
					Margin = buttonSpacing
				};
				colorButton.Click += (s, e) =>
				{
					AppContext.SetThemeAccentColor(colorButton.BackgroundColor);
				};

				colorButton.MouseEnterBounds += (s, e) =>
				{
					this.ThemeColorPanel?.PreviewTheme(colorButton.BackgroundColor);
				};

				return colorButton;
			}
		}
	}
}