WebKit.NET C# Custom Context Menu - winforms

Question

I am implementing a Webkit Browser control in my windows app.
I need to use a custom context menu (right click) that only has copy/cut/paste as its options regardless of what element is right clicked. I need kind of a step-by-step as to how to implement it

Answer 1

Customizing the context menu for the WebKitBrowser supposes that you get a reference to the WebViewClass and then, setting a IWebUIDelegate for it by calling the setUIDelegate() method.
void MyWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var webView = this.GetWebView() as WebKit.Interop.WebViewClass;
webView.setUIDelegate(new MyWebUIDelegate(this));
}
In the IWebUIDelegate implementation you may intercept the contextMenuItemsForElement method and trigger the display of the context menu of the browser.
Here is a working sample:
public partial class Form1 : Form
{
MyWebBrowser webKitBrowser;
public Form1()
{
InitializeComponent();
webKitBrowser = new MyWebBrowser();
webKitBrowser.Dock = DockStyle.Fill;
this.Controls.Add(webKitBrowser);
webKitBrowser.Navigate("http://www.google.com");
}
}
class MyContextMenu : ContextMenu
{
public MyContextMenu()
{
var cutMenuItem = new MenuItem("Cut");
var copyMenuItem = new MenuItem("Copy");
var pasteMenuItem = new MenuItem("Paste");
cutMenuItem.Click += cutMenuItem_Click;
MenuItems.Add(cutMenuItem);
MenuItems.Add(copyMenuItem);
MenuItems.Add(pasteMenuItem);
}
void cutMenuItem_Click(object sender, EventArgs e)
{
//TODO: implement functionality
MessageBox.Show("Cut was selected");
}
}
class MyWebBrowser : WebKitBrowser
{
public event EventHandler ShowContextMenu = new EventHandler(OnFireShowContextMenu);
public MyWebBrowser()
{
DocumentCompleted += MyWebBrowser_DocumentCompleted;
var myContextMenu = new MyContextMenu();
ContextMenu = myContextMenu;
}
void MyWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var webView = this.GetWebView() as WebKit.Interop.WebViewClass;
webView.setUIDelegate(new MyWebUIDelegate(this));
}
public static void OnFireShowContextMenu(object sender, EventArgs e)
{
var webBrowser = (Control)sender;
var webView = (WebKit.Interop.WebViewClass)((MyWebBrowser)sender).GetWebView();
var originalPoint = webBrowser.PointToScreen(new Point(0, 0));
var currentPoint = new Point(Cursor.Position.X - originalPoint.X, Cursor.Position.Y - originalPoint.Y);
((WebKitBrowser)sender).ContextMenu.Show((Control)sender, currentPoint);
}
public void FireShowContextMenu()
{
this.ShowContextMenu(this, null);
}
}
class MyWebUIDelegate : IWebUIDelegate
{
private MyWebBrowser owner;
public MyWebUIDelegate(MyWebBrowser browser)
{
this.owner = browser;
}
//trigger the browser's FireShowContextMenu() method
public int contextMenuItemsForElement(WebView sender, CFDictionaryPropertyBag element, int defaultItemsHMenu)
{
owner.FireShowContextMenu();
return defaultItemsHMenu;
}
//return 1, true
public int hasCustomMenuImplementation()
{
return 1;
}
//the rest of the IWebUIDelegate interface implementation
}
For more insight, probably you would want to study some other customizations, such as open-webkit-sharp.