Exemplo n.º 1
0
        private static void OnCommandChanged(DependencyObject a_dependencyObject, DependencyPropertyChangedEventArgs a_e)
        {
            MenuItem menuItem = a_dependencyObject as MenuItem;

            if (menuItem == null)
            {
                throw new InvalidOperationException(@"MenuItem required");
            }

            ICommand oldCommand = a_e.OldValue as ICommand;

            if (oldCommand != null)
            {
                menuItem.Command = null;
                menuItem.Icon    = null;
                CommandToolTipHelper.ApplyCommandToolTip(menuItem, null);

                ICommandDescriptionProvider oldDescProvider = a_e.OldValue as ICommandDescriptionProvider;
                if (GetOverrideHeader(menuItem) && oldDescProvider != null)
                {
                    BindingOperations.ClearBinding(
                        menuItem,
                        MenuItem.HeaderProperty);
                }
            }

            ICommand newCommand = a_e.NewValue as ICommand;

            if (newCommand != null)
            {
                menuItem.Command = newCommand;

                Uri imageUri = CommandImageHelper.GetCommandImageUri(newCommand);
                if (imageUri != null)
                {
                    MenuItemImage image = new MenuItemImage
                    {
                        Source = new BitmapImage(imageUri)
                    };
                    menuItem.Icon = image;
                }

                // Header
                ICommandDescriptionProvider newDescProvider = a_e.NewValue as ICommandDescriptionProvider;
                if (GetOverrideHeader(menuItem) && newDescProvider != null)
                {
                    BindingOperations.SetBinding(
                        menuItem,
                        MenuItem.HeaderProperty,
                        new Binding("Text")
                    {
                        Source = newDescProvider.Description
                    });
                }

                // tooltip
                CommandToolTipHelper.ApplyCommandToolTip(menuItem, newCommand);
            }
        }
Exemplo n.º 2
0
        private static void OnCommandChanged(DependencyObject a_dependencyObject, DependencyPropertyChangedEventArgs a_e)
        {
            Button button = a_dependencyObject as Button;

            if (button == null)
            {
                throw new InvalidOperationException(@"Button required");
            }

            ICommand oldCommand = a_e.OldValue as ICommand;

            if (oldCommand != null)
            {
                button.Command = null;
                CommandToolTipHelper.ApplyCommandToolTip(button, null);

                ICommandDescriptionProvider oldDescProvider = a_e.OldValue as ICommandDescriptionProvider;
                if (GetOverrideContent(button) && oldDescProvider != null)
                {
                    button.Content = null;
                }
            }

            ICommand newCommand = a_e.NewValue as ICommand;

            if (newCommand != null)
            {
                button.Command = newCommand;
                CommandToolTipHelper.ApplyCommandToolTip(button, newCommand);

                ICommandDescriptionProvider newDescProvider = a_e.NewValue as ICommandDescriptionProvider;
                if (GetOverrideContent(button) && newDescProvider != null)
                {
                    var textContent = new TextBlock()
                    {
                        TextAlignment = TextAlignment.Center,
                        TextWrapping  = TextWrapping.Wrap,
                    };
                    BindingOperations.SetBinding(
                        textContent,
                        TextBlock.TextProperty,
                        new Binding("Text")
                    {
                        Source = newDescProvider.Description
                    });


                    Uri imageUri = CommandImageHelper.GetCommandImageUri(newCommand);
                    if (imageUri != null)
                    {
                        Dock?useText = GetAppendText(button);

                        ButtonImage image = new ButtonImage()
                        {
                            VerticalAlignment   = VerticalAlignment.Center,
                            HorizontalAlignment = HorizontalAlignment.Center,
                            Source = new BitmapImage(imageUri),
                        };

                        if (useText.HasValue)
                        {
                            Label text = new Label()
                            {
                                Margin              = new Thickness(2),
                                VerticalAlignment   = VerticalAlignment.Center,
                                HorizontalAlignment = HorizontalAlignment.Center,
                                Content             = textContent,
                            };
                            DockPanel.SetDock(text, useText.Value);

                            DockPanel container = new DockPanel();
                            container.LastChildFill = true;
                            container.Children.Add(text);
                            container.Children.Add(image);

                            button.Content = container;
                        }
                        else
                        {
                            button.Content = image;
                        }
                    }
                    else
                    {
                        button.Content = textContent;
                    }
                }
            }
        }