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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.ComponentModel;
using System.Windows.Forms;
using System.Windows.Forms.Design;
namespace System.Drawing.Design;
/// <summary>
/// Provides an editor for visually picking a color.
/// </summary>
[CLSCompliant(false)]
public partial class ColorEditor : UITypeEditor
{
/// <summary>
/// Edits the given object value using the editor style provided by ColorEditor.GetEditStyle.
/// </summary>
public override object? EditValue(ITypeDescriptorContext? context, IServiceProvider provider, object? value)
{
if (!provider.TryGetService(out IWindowsFormsEditorService? editorService))
{
return value;
}
using ColorUI? _colorUI = new(this);
_colorUI.Start(editorService, value);
editorService.DropDownControl(_colorUI);
if (_colorUI.Value is Color colorValue && colorValue != Color.Empty)
{
value = colorValue;
}
_colorUI.End();
return value;
}
/// <inheritdoc />
public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext? context) => UITypeEditorEditStyle.DropDown;
/// <inheritdoc />
public override bool GetPaintValueSupported(ITypeDescriptorContext? context) => true;
/// <inheritdoc />
public override void PaintValue(PaintValueEventArgs e)
{
if (e.Value is Color color)
{
using var brush = color.GetCachedSolidBrushScope();
e.Graphics.FillRectangle(brush, e.Bounds);
}
}
}
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