/// <summary>
/// Fade out the window.
/// </summary>
public void FadeOut()
{
if (!IsLoaded)
{
return; //without this it will crash at the below line.
}
RaiseEvent(new RoutedEventArgs(FadingOutEvent));
Action action;
if (CloseBehavior == CloseBehaviors.FadeOutAndClose)
{
nextCloseBehavior = CloseBehaviors.Close;
if (IsModal == true)
{
DialogResult = dialogResult;
}
action = () => Close();
}
else
{
action = () => Hide();
}
Task.Delay(250).ContinueWith(t => {
Dispatcher.Invoke(() => {
action();
RaiseEvent(new RoutedEventArgs(FadedOutEvent));
});
});
}
public new void Show()
{
//subscribe parent window's mousedown event
if (MenuMode)
{
if (ParentWindow == null)
{
throw new ArgumentNullException($"{nameof(ParentWindow)} cannot be null when {nameof(MenuMode)} is true.");
}
Topmost = true;
subParentMouseDown();
}
//init nextCloseBehavior
nextCloseBehavior = CloseBehavior;
base.Show();
}
/// <summary>
/// Fade in the window at mouse position. Or the specified Left and Top position.
/// If the window is already faded in, move the window to the new position. In this case the FadingInEvent will not be raised.
/// </summary>
public void FadeIn(double left = double.NaN, double top = double.NaN)
{
if (!IsLoaded)
{
Opacity = 0d;
Show();//how to call something similar to initializecomponent?
}
//reset nextCloseBehavior
nextCloseBehavior = CloseBehavior;
//compute mouse position or set to existing values
Point newpos, realpos = default;
var mon = NativeHelpers.GetMonitorFromWindow(this);
double currscrnW = mon.Right;
double currscrnH = mon.Bottom;
if (WindowStartupLocation == WindowStartupLocation.Manual)
{
if (left.Equals(double.NaN) || top.Equals(double.NaN))
{
//get the physical pixel-based position.
newpos = PointToScreen(Mouse.GetPosition(this));
//convert to the actual position considering the DPI settings etc.
realpos = PresentationSource.FromVisual(this).CompositionTarget.TransformFromDevice.Transform(newpos);
//make sure the window is displayed inside the screens.
double originX, originY;
if (currscrnW - realpos.X > ActualWidth)
{
originX = 0d;
}
else
{
originX = 1d;
realpos.X -= ActualWidth;
}
if (currscrnH - realpos.Y > ActualHeight)
{
originY = 0d;
}
else
{
originY = 1d;
realpos.Y -= ActualHeight;
}
RenderTransformOrigin_BG = new Point(originX, originY);
}
else
{
//make sure the window is displayed inside the screens.
if (left < 0d)
{
left = 0d;
}
if (top < 0d)
{
top = 0d;
}
if (left + ActualWidth > currscrnW)
{
left = currscrnW - ActualWidth;
}
if (top + ActualHeight > currscrnH)
{
top = currscrnH - ActualHeight;
}
realpos = new Point(left, top);
}
}
if (Opacity == 0d)
{
if (realpos != default)
{
Left = realpos.X;
Top = realpos.Y;
}
Show();
RaiseEvent(new RoutedEventArgs(FadingInEvent));
}
else
{
//move window to the new cursor location
var easefunc = new CubicEase()
{
EasingMode = EasingMode.EaseInOut
};
var anim_move_x = new DoubleAnimation(realpos.X, new Duration(new TimeSpan(0, 0, 0, 0, 300)), FillBehavior.Stop)
{
EasingFunction = easefunc
};
var anim_move_y = new DoubleAnimation(realpos.Y, new Duration(new TimeSpan(0, 0, 0, 0, 300)), FillBehavior.Stop)
{
EasingFunction = easefunc
};
BeginAnimation(LeftProperty, anim_move_x);
BeginAnimation(TopProperty, anim_move_y);
}
}
