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POOne instance of control sharing property with another?
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copied!<p>I created my own toolbar. Inside toolbar I have collection property to display custom items:</p> <pre><code>public static readonly DependencyProperty CustomItemsProperty = DependencyProperty.Register("CustomItems", typeof(List<UIElement>), typeof(DitatToolbar), new PropertyMetadata(new List<UIElement>())); public List<UIElement> CustomItems { get { return GetValue(CustomItemsProperty) as List<UIElement>; } set { this.SetValue(CustomItemsProperty, value); } } </code></pre> <p>On one of my views I declared toolbar with one custom item:</p> <pre><code><my:DitatToolbar Status="{Binding State, Converter={StaticResource ViewEditingStateToToolbarStateConverter}}" Mode="DataEntry"> <my:DitatToolbar.CustomItems> <my:DitatToolbarButton Icon="/IDATT.Infrastructure.SL;component/Images/img_btn_calculate.png" Caption="Next&#x0d;&#x0a;Number" Index="6" Command="{Binding GetNextNumberCommand}" /> </my:DitatToolbar.CustomItems> </my:DitatToolbar> </code></pre> <p>Basically, I wanted to place custom "Get next Number" button on my toolbar. Inside <code>onApplyTemplate</code> I call this method:</p> <pre><code>internal void BuildUi() { if (this.ButtonsStackPanel == null) return; this.defaultStatusVisibility = Visibility.Collapsed; this.defaultNavigationVisibility = Visibility.Collapsed; this.ButtonsStackPanel.Children.Clear(); this.Items = new List<UIElement>(); // Add buttons according to our work mode: switch (this.Mode) { case ModeType.Ok: this.Items.Add(this.GetNewButton(ButtonType.Ok)); break; case ModeType.OkCancel: this.Items.Add(this.GetNewButton(ButtonType.Ok)); this.Items.Add(this.GetNewButton(ButtonType.Cancel)); break; case ModeType.Lookup: this.Items.Add(this.GetNewButton(ButtonType.CancelExit)); this.Items.Add(this.GetNewButton(ButtonType.Ok)); this.Items.Add(new DitatToolbarSeparator()); this.Items.Add(this.GetNewButton(ButtonType.Refresh)); break; case ModeType.DataEntry: this.defaultStatusVisibility = Visibility.Visible; this.defaultNavigationVisibility = Visibility.Visible; this.Items.Add(this.GetNewButton(ButtonType.CancelExit)); this.Items.Add(this.GetNewButton(ButtonType.SaveExit)); this.Items.Add(new DitatToolbarSeparator()); this.Items.Add(this.GetNewButton(ButtonType.Cancel)); this.Items.Add(this.GetNewButton(ButtonType.SaveClose)); this.Items.Add(new DitatToolbarSeparator()); this.Items.Add(this.GetNewButton(ButtonType.RenameId)); this.Items.Add(this.GetNewButton(ButtonType.Delete)); break; case ModeType.OptionsDataEntry: this.defaultStatusVisibility = Visibility.Visible; this.Items.Add(this.GetNewButton(ButtonType.CancelExit)); this.Items.Add(this.GetNewButton(ButtonType.SaveExit)); this.Items.Add(new DitatToolbarSeparator()); this.Items.Add(this.GetNewButton(ButtonType.Save)); break; default: throw new NotSupportedException("DitatToolbar Mode have to be specified"); } if (this.Mode == ModeType.DataEntry || this.Mode == ModeType.OptionsDataEntry) { if (GetBindingExpression(CanEditProperty) == null) { this.SetBinding(CanEditProperty, new Binding("CanEdit") { Mode = BindingMode.TwoWay }); } if (GetBindingExpression(CanDeleteProperty) == null) { this.SetBinding(CanDeleteProperty, new Binding("CanDelete") { Mode = BindingMode.TwoWay }); } if (GetBindingExpression(CanRenameProperty) == null) { this.SetBinding(CanRenameProperty, new Binding("CanRename") { Mode = BindingMode.TwoWay }); } } // Add custom buttons: foreach (var customItem in this.CustomItems) { var ci = customItem as IToolbarItem; this.Items.Insert(ci.Index, customItem); } // Insert buttons into container: foreach (var element in this.Items) { this.ButtonsStackPanel.Children.Add(element); } // Navigation panel visibility this.ShowNavigation(); // Status panel visibility this.ChangeStatus(); } </code></pre> <p>My problem is that for some reason ALL toolbars in my app (various views) see this custom item that I declared only on one view. This causing issues obviously. I wonder what is wrong with my code that <code>CustomItem</code> dependency property becomes STATIC to whole APP?</p> <p><strong>ANSWER</strong></p> <p>Dependency property had to be declared like this:</p> <pre><code>public static readonly DependencyProperty CustomItemsProperty = DependencyProperty.Register("CustomItems", typeof(List<UIElement>), typeof(DitatToolbar), new PropertyMetadata(null)); </code></pre> <p>And I added initialization of this property to constructor:</p> <pre><code>public DitatToolbar() { this.CustomItems = new List<UIElement>(); this.DefaultStyleKey = typeof(DitatToolbar); } </code></pre>

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