mattercontrol/MatterControlLib/PartPreviewWindow/PopupMenuButton.cs

/*
Copyright (c) 2019, Lars Brubaker, 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.
2. Redistributions in binary form must reproduce the above copyright notice,
   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
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of the FreeBSD Project.
*/

using System;
using System.Linq;
using MatterHackers.Agg;
using MatterHackers.Agg.Image;
using MatterHackers.Agg.UI;
using MatterHackers.Agg.VertexSource;
using MatterHackers.MatterControl.CustomWidgets;

namespace MatterHackers.MatterControl.PartPreviewWindow
{
	public class PopupMenuButton : PopupButton
	{
		private readonly ThemeConfig theme;
		private bool _drawArrow = false;
		private VertexStorage dropArrow = DropArrow.DownArrow;
		private RectangleDouble dropButtonBounds = RectangleDouble.ZeroIntersection;

		public PopupMenuButton(ThemeConfig theme)
		{
			this.theme = theme;
			this.DisabledColor = theme.DisabledColor;
			this.HoverColor = theme.SlightShade;
			this.MouseDownColor = theme.MinimalShade;
			this.PopupBorderColor = theme.PopupBorderColor;

			this.BackgroundRadius = new RadiusCorners(theme.ButtonRadius, theme.ButtonRadius, 0, 0);
		}

		public PopupMenuButton(ImageBuffer imageBuffer, ThemeConfig theme)
			: this(new IconButton(imageBuffer, theme), theme)
		{
		}

		public PopupMenuButton(string text, ImageBuffer imageBuffer, ThemeConfig theme)
			: this(new TextIconButton(text, imageBuffer, theme)
			{
				Padding = new BorderDouble(5, 0, 5, 0),
			}, theme)
		{
		}

		public PopupMenuButton(GuiWidget viewWidget, ThemeConfig theme)
			: base(viewWidget)
		{
			viewWidget.Selectable = false;
			viewWidget.BackgroundColor = Color.Transparent;

			this.theme = theme;
			this.DisabledColor = theme.DisabledColor;

			this.HoverColor = theme.ToolbarButtonHover;
			this.BackgroundColor = theme.ToolbarButtonBackground;
			this.MouseDownColor = theme.ToolbarButtonDown;
			this.PopupBorderColor = theme.PopupBorderColor;

			this.BackgroundRadius = new RadiusCorners(theme.ButtonRadius, theme.ButtonRadius, 0, 0);
		}

		public PopupMenuButton(string text, ThemeConfig theme)
			: this(new TextButton(text, theme)
			{
				Selectable = false,
				Padding = theme.TextButtonPadding.Clone(right: 5)
			}, theme)
		{
			this.DrawArrow = true;
			this.HoverColor = theme.ToolbarButtonHover;
			this.BackgroundColor = theme.ToolbarButtonBackground;
			this.MouseDownColor = theme.ToolbarButtonDown;
		}

		public Color DisabledColor { get; set; }

		public Color MouseDownColor { get; set; } = Color.Transparent;

		public bool DistinctPopupButton { get; set; } = false;

		public bool DrawArrow
		{
			get => _drawArrow;
			set
			{
				if (_drawArrow != value)
				{
					_drawArrow = value;

					if (_drawArrow)
					{
						this.Padding = new BorderDouble(this.Padding.Left, this.Padding.Bottom, 20, this.Padding.Top);
					}
				}
			}
		}

		public override void OnBoundsChanged(EventArgs e)
		{
			if (this.Children.FirstOrDefault() is GuiWidget firstChild)
			{
				var bounds = firstChild.LocalBounds;
				dropButtonBounds = new RectangleDouble(bounds.Right, 0, this.Width, this.Height);
			}

			base.OnBoundsChanged(e);
		}

		public override void OnMouseEnterBounds(MouseEventArgs mouseEvent)
		{
			Invalidate();
			base.OnMouseEnterBounds(mouseEvent);
		}

		public override void OnMouseLeaveBounds(MouseEventArgs mouseEvent)
		{
			Invalidate();
			base.OnMouseLeaveBounds(mouseEvent);
		}

		public override void OnDraw(Graphics2D graphics2D)
		{
			base.OnDraw(graphics2D);

			if (this.FirstWidgetUnderMouse
				&& this.DistinctPopupButton
				&& dropButtonBounds != RectangleDouble.ZeroIntersection)
			{
				graphics2D.FillRectangle(dropButtonBounds, theme.SlightShade);
			}

			if (this.DrawArrow)
			{
				// Draw directional arrow
				graphics2D.Render(
					dropArrow,
					LocalBounds.Right - DropArrow.ArrowHeight * 2 - 2,
					LocalBounds.Center.Y + DropArrow.ArrowHeight / 2,
					this.Enabled ? theme.BorderColor : this.DisabledColor);
			}
		}

		public override Color BackgroundColor
		{
			get
			{
				var firstWidgetUnderMouse = FirstWidgetUnderMouse;
				if (!MenuVisible
					&& this.MouseCaptured
					&& firstWidgetUnderMouse
					&& this.Enabled)
				{
					return this.MouseDownColor;
				}
				else if (!MenuVisible
					&& firstWidgetUnderMouse
					&& this.Enabled)
				{
					return this.HoverColor;
				}
				else
				{
					return base.BackgroundColor;
				}
			}
			set => base.BackgroundColor = value;
		}

		public override void OnClosed(EventArgs e)
		{
			this.PopupContent?.Close();
			base.OnClosed(e);
		}

		protected override void OnBeforePopup()
		{
			// Force off-white if content has transparent background
			if (this.PopupContent.BackgroundColor == Color.Transparent)
			{
				this.PopupContent.BackgroundColor = new Color("#f6f6f6");
			}

			base.OnBeforePopup();
		}
	}
}