Zoom In and Zoom out

Question

Zoom In and Zoom out On mouse wheel move in silverlight

DeivaMurugan D · Answer

Xaml xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentation xmlns:x=http://schemas.microsoft.com/winfx/2006/xaml xmlns:d=http://schemas.microsoft.com/expression/blend/2008 xmlns:mc=http://schemas.openxmlformats.org/markup-compatibility/2006 mc:Ignorable=d xmlns:navigation=clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation d:DesignWidth=640 d:DesignHeight=480 Title=ZoomIn Page> XAML.CS using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Windows.Navigation; namespace BillingFinance { public partial class ZoomIn : Page { public ZoomIn() { InitializeComponent(); } // Executes when the user navigates to this page. protected override void OnNavigatedTo(NavigationEventArgs e) { } private void ZoomIn_Click(object sender RoutedEventArgs e) { storyboard.Begin(); } private void ZoomOut_Click(object sender RoutedEventArgs e) { storyboard.Stop(); } private void Image_MouseWheel(object sender MouseWheelEventArgs e) { storyboard.Begin(); } } }

Lalit M · Answer

Try this code sample bool zooming = ctrlKey && (Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift; if (zooming) { // go through all element beneath the current mouse position IEnumerable elements = VisualTreeHelper.FindElementsInHostCoordinates(currentPoint s_rootElement); foreach (UIElement element in elements) { IMouseWheelZoom mouseZooming = element as IMouseWheelZoom; if (mouseZooming != null) { mouseZooming.OnMouseWheelZooming( new MouseWheelZoomingEventArgs(currentPoint e.Delta)); break; } } } else { // normal.... } for reference http://blog.thekieners.com/2009/04/06/how-to-enable-mouse-wheel-scrolling-in-silverlight-without-extending-controls/ http://www.hanselman.com/blog/TheWeeklySourceCode18DeepZoomSeadragonSilverlight2MultiScaleImageMouseWheelZoomingAndPanningEdition.aspx