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WebBrowserHelper file for disabling WP7 pinch/zoom & scroll-snapback
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using LinqToVisualTree;
using Microsoft.Phone.Controls;
namespace App.Util
{
/// <summary>
/// Suppresses pinch zoom and optionally scrolling of the WebBrowser control
/// </summary>
public class WebBrowserHelper
{
private WebBrowser _browser;
/// <summary>
/// Gets or sets whether to suppress the scrolling of
/// the WebBrowser control;
/// </summary>
public bool ScrollDisabled { get; set; }
public WebBrowserHelper(WebBrowser browser)
{
_browser = browser;
browser.Loaded += new RoutedEventHandler(browser_Loaded);
}
private void browser_Loaded(object sender, RoutedEventArgs e)
{
var border = _browser.Descendants<Border>().Last() as Border;
border.ManipulationDelta += Border_ManipulationDelta;
border.ManipulationCompleted += Border_ManipulationCompleted;
}
private void Border_ManipulationCompleted(object sender,
ManipulationCompletedEventArgs e)
{
// suppress zoom
if (e.FinalVelocities.ExpansionVelocity.X != 0.0 ||
e.FinalVelocities.ExpansionVelocity.Y != 0.0)
e.Handled = true;
}
private void Border_ManipulationDelta(object sender,
ManipulationDeltaEventArgs e)
{
// suppress zoom
if (e.DeltaManipulation.Scale.X != 0.0 ||
e.DeltaManipulation.Scale.Y != 0.0)
e.Handled = true;
// optionally suppress scrolling
if (ScrollDisabled)
{
if (e.DeltaManipulation.Translation.X != 0.0 ||
e.DeltaManipulation.Translation.Y != 0.0)
e.Handled = true;
}
}
}
}
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