示例#1
0
文件: Setter.cs 项目: vebin/Perspex
        private InstancedBinding Clone(InstancedBinding sourceInstance, IStyle style, IObservable <bool> activator)
        {
            InstancedBinding cloned;

            if (activator != null)
            {
                var description = style?.ToString();

                if (sourceInstance.Subject != null)
                {
                    var activated = new ActivatedSubject(activator, sourceInstance.Subject, description);
                    cloned = new InstancedBinding(activated, sourceInstance.Mode, BindingPriority.StyleTrigger);
                }
                else if (sourceInstance.Observable != null)
                {
                    var activated = new ActivatedObservable(activator, sourceInstance.Observable, description);
                    cloned = new InstancedBinding(activated, sourceInstance.Mode, BindingPriority.StyleTrigger);
                }
                else
                {
                    var activated = new ActivatedValue(activator, sourceInstance.Value, description);
                    cloned = new InstancedBinding(activated, BindingMode.OneWay, BindingPriority.StyleTrigger);
                }
            }
            else
            {
                if (sourceInstance.Subject != null)
                {
                    cloned = new InstancedBinding(sourceInstance.Subject, sourceInstance.Mode, BindingPriority.Style);
                }
                else if (sourceInstance.Observable != null)
                {
                    cloned = new InstancedBinding(sourceInstance.Observable, sourceInstance.Mode, BindingPriority.Style);
                }
                else
                {
                    cloned = new InstancedBinding(sourceInstance.Value, BindingPriority.Style);
                }
            }

            return(cloned);
        }
示例#2
0
        /// <summary>
        /// Applies the setter to the control.
        /// </summary>
        /// <param name="style">The style that is being applied.</param>
        /// <param name="control">The control.</param>
        /// <param name="activator">An optional activator.</param>
        public void Apply(IStyle style, IStyleable control, IObservable <bool> activator)
        {
            Contract.Requires <ArgumentNullException>(control != null);

            var description = style?.ToString();

            if (Property == null)
            {
                throw new InvalidOperationException("Setter.Property must be set.");
            }

            var binding = Value as IBinding;

            if (binding != null)
            {
                if (activator == null)
                {
                    control.Bind(Property, binding);
                }
                else
                {
                    var subject   = binding.CreateSubject(control, Property);
                    var activated = new ActivatedSubject(activator, subject, description);
                    Bind(control, Property, binding, activated);
                }
            }
            else
            {
                if (activator == null)
                {
                    control.SetValue(Property, Value, BindingPriority.Style);
                }
                else
                {
                    var activated = new ActivatedValue(activator, Value, description);
                    control.Bind(Property, activated, BindingPriority.StyleTrigger);
                }
            }
        }
示例#3
0
文件: Setter.cs 项目: vebin/Perspex
        /// <summary>
        /// Applies the setter to a control.
        /// </summary>
        /// <param name="style">The style that is being applied.</param>
        /// <param name="control">The control.</param>
        /// <param name="activator">An optional activator.</param>
        public IDisposable Apply(IStyle style, IStyleable control, IObservable <bool> activator)
        {
            Contract.Requires <ArgumentNullException>(control != null);

            var description = style?.ToString();

            if (Property == null)
            {
                throw new InvalidOperationException("Setter.Property must be set.");
            }

            var binding = Value as IBinding;

            if (binding == null)
            {
                if (activator == null)
                {
                    return(control.Bind(Property, ObservableEx.SingleValue(Value), BindingPriority.Style));
                }
                else
                {
                    var activated = new ActivatedValue(activator, Value, description);
                    return(control.Bind(Property, activated, BindingPriority.StyleTrigger));
                }
            }
            else
            {
                var source = binding.Initiate(control, Property);

                if (source != null)
                {
                    var cloned = Clone(source, style, activator);
                    return(BindingOperations.Apply(control, Property, cloned, null));
                }
            }

            return(Disposable.Empty);
        }