/// <summary>
/// Enables you to produce special effects when showing this <see cref="ContextMenuStrip"/>.
/// </summary>
/// <param name="contextMenuStrip">
/// The <see cref="ContextMenuStrip"/>.
/// </param>
/// <param name="animation">
/// The type of animation.
/// </param>
/// <param name="time">
/// The time it takes to play the animation, in milliseconds.
/// <para>
/// Please note that this parameter is ignored if the animation is set to
/// <see cref="ContextMenuStripExAnimation.Default"/>.
/// </para>
/// </param>
public static void EnableAnimation(this ContextMenuStrip contextMenuStrip, ContextMenuStripExAnimation animation = ContextMenuStripExAnimation.Default, int time = 200)
{
if (!(contextMenuStrip is ContextMenuStrip cms))
{
return;
}
var settings = new KeyValuePair <int, WinApi.AnimateWindowFlags>(time, (WinApi.AnimateWindowFlags)animation);
if (EnabledAnimation.ContainsKey(cms))
{
EnabledAnimation[cms] = settings;
return;
}
EnabledAnimation.Add(cms, settings);
var loaded = false;
cms.Opening += (sender, args) =>
{
if (animation != ContextMenuStripExAnimation.Default)
{
WinApi.NativeMethods.AnimateWindow(cms.Handle, EnabledAnimation[cms].Key, EnabledAnimation[cms].Value);
if (loaded)
{
return;
}
loaded = true;
cms.Refresh();
return;
}
cms.Opacity = 0d;
var timer = new Timer
{
Interval = 1,
Enabled = true
};
timer.Tick += (s, a) =>
{
if (cms.Opacity < 1d)
{
cms.Opacity += .1d;
return;
}
timer.Dispose();
};
};
}
/// <summary>
/// Enables you to produce special effects when showing this
/// <see cref="ContextMenuStrip"/>.
/// </summary>
/// <param name="contextMenuStrip">
/// The <see cref="ContextMenuStrip"/>.
/// </param>
/// <param name="animation">
/// The type of animation.
/// </param>
/// <param name="time">
/// The time it takes to play the animation, in milliseconds.
/// <para>
/// Please note that this parameter is ignored if the animation is set to
/// <see cref="ContextMenuStripExAnimation.Default"/>.
/// </para>
/// </param>
public static void EnableAnimation(this ContextMenuStrip contextMenuStrip, ContextMenuStripExAnimation animation = ContextMenuStripExAnimation.Default, int time = 200)
{
if (!(contextMenuStrip is { } cms))
{
return;
}
var hash = cms.GetHashCode() + nameof(EnableAnimation).GetHashCode();
if (HashList.Contains(hash))
{
return;
}
HashList.Add(hash);
var loaded = false;
var timer = new Timer
{
Interval = 1,
Enabled = false
};
timer.Tick += OnTick;
cms.Opening += OnOpening;
cms.Disposed += OnDisposed;
void OnTick(object sender, EventArgs e)
{
if (!(sender is Timer owner))
{
return;
}
if (cms.Opacity < 1d)
{
cms.Opacity += .1d;
return;
}
owner.Enabled = false;
cms.Opacity = 1d;
}
void OnOpening(object sender, CancelEventArgs e)
{
if (!(sender is ContextMenuStrip owner) || e.Cancel)
{
return;
}
if (animation != ContextMenuStripExAnimation.Default)
{
WinApi.NativeMethods.AnimateWindow(owner.Handle, time, (WinApi.AnimateWindowFlags)animation);
if (loaded)
{
return;
}
loaded = true;
owner.Refresh();
return;
}
owner.Opacity = 0d;
timer.Enabled = true;
}
void OnDisposed(object sender, EventArgs e) => timer.Dispose();
}
