/// <summary>
/// Create a dialog whose entire content is a GeckoFx control displaying the specified URL.
/// Once the browser has navigated to that URL, add it to the window's Controls.
/// Typically the caller will call ShowDialog, and dispose when it gets closed.
/// If "hidden" is set to true, the dialog is NOT shown. This is useful when we need to
/// do something in a browser without any UI, like implement the Logout command in the
/// BloomLibraryUploadControl.
/// In the normal case where the dialog is shown, it is up to the caller to dispose of it when it is closed.
/// When hidden, it gets disposed in the CloseDialog code (since the caller would typically have
/// no way to know when whatever we wanted to happen in the browser is finished).
/// The "whenClosed" action is only invoked if "hidden" is true.
/// </summary>
public BrowserDialog(string url, bool hidden = false, Action whenClosed = null)
{
InitializeComponent();
FormClosing += BrowserDialog_FormClosing;
_hidden = hidden;
_whenClosed = whenClosed;
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow; // draggable
this.Text = ""; // don't show the title, we do that in the html
// The Size setting is needed on Linux to keep the browser from coming up as a small
// rectangle in the upper left corner...
_browser = new Browser {
Dock = DockStyle.Fill, Location = new Point(3, 3), Size = new Size(this.Width - 6, this.Height - 6)
};
_browser.BackColor = Color.White;
var dummy = _browser.Handle; // gets the WebBrowser created
_browser.WebBrowser.DocumentCompleted += (sender, args) =>
{
if (!hidden)
{
// If the control gets added to the tab before it has navigated somewhere,
// it shows as solid black, despite setting the BackColor to white.
// So just don't show it at all until it contains what we want to see.
this.Controls.Add(_browser);
}
};
_browser.Navigate(url, false);
_browser.Focus();
CurrentDialog = this;
_activeDialogs.Add(this);
}
private void BrowserDialog_FormClosing(object sender, FormClosingEventArgs e)
{
if (CloseMessage != null)
{
e.Cancel = true;
WebSocketServer.SendString(kWebsocketContext, "close", CloseMessage);
return;
}
_activeDialogs.Remove(this);
if (_activeDialogs.Count > 0)
{
CurrentDialog = _activeDialogs[_activeDialogs.Count - 1];
}
else
{
CurrentDialog = null;
}
}