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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved
//
//
// Abstract:
//
// This file contains the entry point to the application.
using System;
using System.Windows;
using System.Runtime;
using Microsoft.Samples.Printing.PrinterExtension.Types;
using Microsoft.Samples.Printing.PrinterExtension.Helpers;
using System.Windows.Interop;
namespace Microsoft.Samples.Printing.PrinterExtension
{
/// <summary>
/// Interaction logic for App.xaml.
/// </summary>
public partial class App : Application
{
/// <summary>
/// This is the event handler invoked on various driver events.
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArgs"></param>
private static void OnDriverEvent(object sender, PrinterExtensionEventArgs eventArgs)
{
//
// Display the print preferences window.
//
if (eventArgs.ReasonId.Equals(PrinterExtensionReason.PrintPreferences))
{
PrintPreferenceWindow printPreferenceWindow = new PrintPreferenceWindow();
printPreferenceWindow.Initialize(eventArgs);
//
// Set the caller application's window as parent/owner of the newly created printing preferences window.
//
WindowInteropHelper wih = new WindowInteropHelper(printPreferenceWindow);
wih.Owner = eventArgs.WindowParent;
//
// Display a modal/non-modal window based on the 'WindowModal' parameter.
//
if (eventArgs.WindowModal)
{
printPreferenceWindow.ShowDialog();
}
else
{
printPreferenceWindow.Show();
// Flash the window to draw the user's attention. This is required
// because the printer extension may be drawn behind the parent window.
// The return value of FlashWindow can be safely ignored if there is no need
// to know if the window has focus or not.
WindowHelper.FlashWindow(wih.Handle);
}
}
else if (eventArgs.ReasonId.Equals(PrinterExtensionReason.DriverEvent))
{
//
// Handle driver events here.
//
}
}
/// <summary>
/// Perform initialization tasks for the printer extension in this event handler.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Application_Startup(object sender, StartupEventArgs e)
{
//
// It is recommended that exactly one instance of the PrinterExtensionManager be created per instance of
// the printer extension.
//
if (manager != null)
{
return;
}
manager = new PrinterExtensionManager();
//
// Enable events to be received on one printer driver id.
//
// Note: The order of adding the delegate to PrinterExtensionManager.OnDriverEvent
// and invoking PrinterExtensionManager::EnableEvents is important.
// Adding the delegate should be done first.
//
manager.OnDriverEvent += OnDriverEvent;
//
// It is recommended that an instance of a printer extension invoke PrinterExtensionManager::EnableEvents
// for exactly one printer driver id. The printer driver id could come in from a command line argument,
// thereby allowing one application binary to dynamically invoke PrinterExtensionManager::EnableEvents against
// the appropriate printer driver id.
//
manager.EnableEvents(Guid.Parse(PrinterDriverID));
}
/// <summary>
/// Perform uninitialization tasks for the printer extension in this event handler.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Application_Exit(object sender, ExitEventArgs e)
{
manager.OnDriverEvent -= OnDriverEvent;
manager.DisableEvents();
manager = null;
}
/// <summary>
/// This is the printer driver id, as defined in the printer driver manifest file.
/// Please replace this GUID with the printer driver id from your manifest file.
///
/// It is recommended that you invoke PrinterExtensionManager::EnableEvents() on exactly
/// one printer driver id. The id could come in from a command line argument, thereby enabling
/// one application binary to work with multiple printer driver ids.
/// </summary>
private const string PrinterDriverID = "{E0691E8D-F7CC-456E-A7B5-D1FC19BA2279}";
/// <summary>
/// Instance of the PrinterExtensionManager. It is recommended that you have only instance
/// of the PrinterExtensionManager per application instance.
/// </summary>
private static PrinterExtensionManager manager = null;
}
}
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