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src/MahApps.Metro/MahApps.Metro.Shared/Actions/CloseFlyoutAction.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| using MahApps.Metro.Controls; | ||
|
|
||
| namespace MahApps.Metro.Actions | ||
| { | ||
| public class CloseFlyoutAction : CommandTriggerAction | ||
| { | ||
| private Flyout associatedFlyout; | ||
|
|
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| private Flyout AssociatedFlyout => this.associatedFlyout ?? (this.associatedFlyout = this.AssociatedObject.TryFindParent<Flyout>()); | ||
|
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| protected override void Invoke(object parameter) | ||
| { | ||
| if (this.AssociatedObject == null || (this.AssociatedObject != null && !this.AssociatedObject.IsEnabled)) | ||
| { | ||
| return; | ||
| } | ||
|
|
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| var command = this.Command; | ||
| if (command != null) | ||
| { | ||
| var commandParameter = this.GetCommandParameter(); | ||
| if (command.CanExecute(commandParameter)) | ||
| { | ||
| command.Execute(commandParameter); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| this.AssociatedFlyout?.SetCurrentValue(Flyout.IsOpenProperty, false); | ||
| } | ||
| } | ||
|
|
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| protected override object GetCommandParameter() | ||
| { | ||
| return this.CommandParameter ?? this.AssociatedFlyout; | ||
| } | ||
| } | ||
| } |
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128
src/MahApps.Metro/MahApps.Metro.Shared/Actions/CommandTriggerAction.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| using System; | ||
| using System.Windows; | ||
| using System.Windows.Input; | ||
| using System.Windows.Interactivity; | ||
|
|
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| namespace MahApps.Metro.Actions | ||
| { | ||
| /// <summary> | ||
| /// This CommandTriggerAction can be used to bind any event on any FrameworkElement to an <see cref="ICommand" />. | ||
| /// This trigger can only be attached to a FrameworkElement or a class deriving from FrameworkElement. | ||
| /// | ||
| /// This class is inspired from Laurent Bugnion and his EventToCommand. | ||
| /// <web>http://www.mvvmlight.net</web> | ||
| /// <license> See license.txt in this solution or http://www.galasoft.ch/license_MIT.txt </license> | ||
| /// </summary> | ||
| public class CommandTriggerAction : TriggerAction<FrameworkElement> | ||
| { | ||
| /// <summary> | ||
| /// Identifies the <see cref="Command" /> dependency property | ||
| /// </summary> | ||
| public static readonly DependencyProperty CommandProperty | ||
| = DependencyProperty.Register(nameof(Command), | ||
| typeof(ICommand), | ||
| typeof(CommandTriggerAction), | ||
| new PropertyMetadata(null, (s, e) => OnCommandChanged(s as CommandTriggerAction, e))); | ||
|
|
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| /// <summary> | ||
| /// Gets or sets the command that this trigger is bound to. | ||
| /// </summary> | ||
| public ICommand Command | ||
| { | ||
| get { return (ICommand)this.GetValue(CommandProperty); } | ||
| set { this.SetValue(CommandProperty, value); } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Identifies the <see cref="CommandParameter" /> dependency property | ||
| /// </summary> | ||
| public static readonly DependencyProperty CommandParameterProperty | ||
| = DependencyProperty.Register(nameof(CommandParameter), | ||
| typeof(object), | ||
| typeof(CommandTriggerAction), | ||
| new PropertyMetadata(null, | ||
| (s, e) => | ||
| { | ||
| var sender = s as CommandTriggerAction; | ||
| if (sender?.AssociatedObject != null) | ||
| { | ||
| sender.EnableDisableElement(); | ||
| } | ||
| })); | ||
|
|
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| /// <summary> | ||
| /// Gets or sets an object that will be passed to the <see cref="Command" /> attached to this trigger. | ||
| /// </summary> | ||
| public object CommandParameter | ||
| { | ||
| get { return this.GetValue(CommandParameterProperty); } | ||
| set { this.SetValue(CommandParameterProperty, value); } | ||
| } | ||
|
|
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| protected override void OnAttached() | ||
| { | ||
| base.OnAttached(); | ||
| this.EnableDisableElement(); | ||
| } | ||
|
|
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| protected override void Invoke(object parameter) | ||
| { | ||
| if (this.AssociatedObject == null || (this.AssociatedObject != null && !this.AssociatedObject.IsEnabled)) | ||
| { | ||
| return; | ||
| } | ||
|
|
||
| var command = this.Command; | ||
| if (command != null) | ||
| { | ||
| var commandParameter = this.GetCommandParameter(); | ||
| if (command.CanExecute(commandParameter)) | ||
| { | ||
| command.Execute(commandParameter); | ||
| } | ||
| } | ||
| } | ||
|
|
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| private static void OnCommandChanged(CommandTriggerAction action, DependencyPropertyChangedEventArgs e) | ||
| { | ||
| if (action == null) | ||
| { | ||
| return; | ||
| } | ||
|
|
||
| if (e.OldValue != null) | ||
| { | ||
| ((ICommand)e.OldValue).CanExecuteChanged -= action.OnCommandCanExecuteChanged; | ||
| } | ||
|
|
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| var command = (ICommand)e.NewValue; | ||
| if (command != null) | ||
| { | ||
| command.CanExecuteChanged += action.OnCommandCanExecuteChanged; | ||
| } | ||
|
|
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| action.EnableDisableElement(); | ||
| } | ||
|
|
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| protected virtual object GetCommandParameter() | ||
| { | ||
| return this.CommandParameter ?? this.AssociatedObject; | ||
| } | ||
|
|
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| private void EnableDisableElement() | ||
| { | ||
| if (this.AssociatedObject == null) | ||
| { | ||
| return; | ||
| } | ||
|
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| var command = this.Command; | ||
| this.AssociatedObject.SetCurrentValue(UIElement.IsEnabledProperty, command == null || command.CanExecute(this.GetCommandParameter())); | ||
| } | ||
|
|
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| private void OnCommandCanExecuteChanged(object sender, EventArgs e) | ||
| { | ||
| this.EnableDisableElement(); | ||
| } | ||
| } | ||
| } |
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