// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#if WINFORMS_ANALYZERS
namespace System.Windows.Forms.Analyzers;
#else
namespace System.Windows.Forms;
#endif

/// <summary>
///  Specifies the different high DPI modes that can be applied to an application.
/// </summary>
/// <remarks>
///  <para>
///   Specifying the high DPI mode is dependent on the OS version of the machine you're running your application on.
///   Setting the high DPI mode will work on machines running Windows 10 Creators Update (version 1703) or later versions.
///  </para>
///  <para>
///   Changing the DPI mode while the application is running doesn't impact scaling if you're using the `PerMonitor` value.
///   If there is more than one monitor attached and their DPI settings are different, the DPI may change when the window
///   is moved from one monitor to the other.
///   In this case, the application rescales according to the new monitor's DPI settings.
///   Alternatively, the DPI of a window can be changed when the OS scaling setting is changed for the monitor the window is on.
///  </para>
/// </remarks>
public enum HighDpiMode
{
    /// <summary>
    ///  The window does not scale for DPI changes and always assumes a scale factor of 100%.
    /// </summary>
    DpiUnaware,

    /// <summary>
    ///  The window queries for the DPI of the primary monitor once and uses this for the application on all monitors.
    /// </summary>
    SystemAware,

    /// <summary>
    ///  The window checks for DPI when it's created and adjusts scale factor when the DPI changes.
    /// </summary>
    PerMonitor,

    /// <summary>
    ///  Similar to <see cref="PerMonitor"/>, but enables child window DPI change notification, improved scaling of
    ///  comctl32 controls and dialog scaling.
    /// </summary>
    PerMonitorV2,

    /// <summary>
    ///  Similar to <see cref="DpiUnaware"/>, but improves the quality of GDI/GDI+ based content.
    /// </summary>
    DpiUnawareGdiScaled
}
