private void Page_Appearing(object sender, EventArgs e)
{
if (IsEnabled && FocusElement != null)
{
FocusElement.Focus();
}
}
protected override void Invoke(VisualElement sender)
{
if (PlayOnce && _hasPlayed)
{
return;
}
if (Target == null)
{
Target = sender;
}
Target.Opacity = 0;
Target.AnchorX = 0.5;
Target.AnchorY = 0.5;
var animationController = new Animation();
switch (Direction)
{
case PushDirection.Top:
VerticalAnimation(animationController);
break;
case PushDirection.Right:
HorizontalAnimation(animationController);
break;
case PushDirection.Bottom:
VerticalAnimation(animationController, true);
break;
case PushDirection.Left:
HorizontalAnimation(animationController, true);
break;
default:
return;
}
var fadeAnimation = new Animation(v => Target.Opacity = v, easing: Easing.CubicIn);
animationController.Add(0.25, 0.65, fadeAnimation);
animationController.Commit(Target, nameof(PushFade),
16,
(uint)Duration,
finished: async(d, b) =>
{
if (FocusElement == null)
{
return;
}
_hasPlayed = true;
await Task.Delay(500);
FocusElement.Focus();
});
}
public Form1()
{
InitializeComponent();
this.KeyPreview = true;
this.KeyPress +=
new KeyPressEventHandler(Form1_KeyPress);
//FocusElement.Visible = false;
FocusElement.Focus();
this.FormBorderStyle = FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.MinimizeBox = false;
ResultLabel.Text = "0";
}
public static void SetElementFocus(this UIElement element, string specificElementName)
{
if (element == null)
{
throw new ArgumentNullException("Element");
}
//If a specific name is given, attempt to find a child with that name.
//If one is found, either focus on it or its first focusable child.
//If none of these are focusable, exit out.
//If no specific name is given,
//attempt to set focus on the given element or its first focusable child.
UIElement FocusElement = null;
if (!string.IsNullOrEmpty(specificElementName))
{
var NamedChild = element.FindAllVisualChildren <FrameworkElement>().Where(o => o.Name == specificElementName).FirstOrDefault();
if (NamedChild.Focusable)
{
FocusElement = NamedChild;
}
else
{
FocusElement = NamedChild.FindAllVisualChildren <UIElement>().Where(o => o.Focusable).FirstOrDefault();
}
}
else
{
if (element.Focusable)
{
FocusElement = element;
}
else
{
FocusElement = element.FindAllVisualChildren <UIElement>().Where(o => o.Focusable).FirstOrDefault();
}
}
if (FocusElement == null)
{
return;
}
FocusElement.Focus();
Keyboard.Focus(FocusElement);
}
void AssociatedButtonClick(object sender, RoutedEventArgs e)
{
Keyboard.Focus(FocusElement);
if (FocusElement is DatePicker)
{
// HACK: get the date-picker to focus the textbox-part by sending a Key.Up
var eventArgs = new KeyEventArgs(
Keyboard.PrimaryDevice,
Keyboard.PrimaryDevice.ActiveSource,
0,
Key.Up)
{
RoutedEvent = UIElement.KeyDownEvent
};
FocusElement.RaiseEvent(eventArgs);
}
}
void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
switch (e.KeyChar)
{
case (char)40:
case (char)41:
case (char)42:
case (char)43:
case (char)45:
case (char)47:
case (char)48:
case (char)49:
case (char)50:
case (char)51:
case (char)52:
case (char)53:
case (char)54:
case (char)55:
case (char)56:
case (char)57:
add(e.KeyChar.ToString());
e.Handled = true;
break;
case (char)13: //enter
showResult();
e.Handled = true;
break;
case (char)8: //backspace
removeLastChar();
e.Handled = true;
break;
}
FocusElement.Focus();
}
private void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
{
FocusElement?.Focus();
}
/// <summary> /// 自动获得焦点方法 /// </summary> /// <returns></returns> public ValueTask FocusAsync() => FocusElement.FocusAsync();
private void add(string stringToAdd)
{
Computations.Text += stringToAdd;
FocusElement.Focus();
//Computations.Focus();
}
