How to capture kmouse events at console application in Xamarin.Mac, NSEvent is disable.
I knowed how to use CGEvent capture Mouse Event, as follows ：
public static void Main(string[] args)
{
NSApplication.Init();
var call = new CGEvent.CGEventTapCallback(Callback);
var data = new IntPtr();
var eventTap = CGEvent.CreateTap(CGEventTapLocation.HID, CGEventTapPlacement.TailAppend, CGEventTapOptions.Default, CGEventMask.MouseMoved, call, data);
var cfMachPort = new CFMachPort(eventTap.Handle);
CFRunLoopSource runLoopSource = cfMachPort.CreateRunLoopSource();
CFRunLoop.Main.AddSource(runLoopSource, CFRunLoop.ModeCommon);
CGEvent.TapEnable(eventTap);
CFRunLoop.Main.Run();
}
public static IntPtr Callback(IntPtr eventTap, CGEventType cGEventType, IntPtr eventRef, IntPtr usrInfo)
{
Console.WriteLine("鼠标移动了");
return eventTap;
}
Related
I am using a Dependency service to pick a photo from the gallery. and I want to show the path when the user selects an image from their phone in a Label.
I have read too many logs but not getting the proper results.
I want it like this:
Now the selected image is displayed properly but what I don't get is how to display the path of the selected image.
Please suggest me how to do it for both android and ios.
Note: I'm using Dependency service for it so I don't want third-party plugins.
I hope I will get a better solution for this.
Thanks in advance.
Creating the interface in forms
namespace xxx
{
public interface IPhotoPickerService
{
Task<Dictionary<string,Stream>> GetImageStreamAsync();
}
}
in iOS
[assembly: Dependency (typeof (PhotoPickerService))]
namespace xxx.iOS
{
public class PhotoPickerService : IPhotoPickerService
{
TaskCompletionSource<Dictionary<string, Stream>> taskCompletionSource;
UIImagePickerController imagePicker;
Task<Dictionary<string, Stream>> IPhotoPickerService.GetImageStreamAsync()
{
// Create and define UIImagePickerController
imagePicker = new UIImagePickerController
{
SourceType = UIImagePickerControllerSourceType.PhotoLibrary,
MediaTypes = UIImagePickerController.AvailableMediaTypes(UIImagePickerControllerSourceType.PhotoLibrary)
};
// Set event handlers
imagePicker.FinishedPickingMedia += OnImagePickerFinishedPickingMedia;
imagePicker.Canceled += OnImagePickerCancelled;
// Present UIImagePickerController;
UIWindow window = UIApplication.SharedApplication.KeyWindow;
var viewController = window.RootViewController;
viewController.PresentModalViewController(imagePicker, true);
// Return Task object
taskCompletionSource = new TaskCompletionSource<Dictionary<string, Stream>>();
return taskCompletionSource.Task;
}
void OnImagePickerFinishedPickingMedia(object sender, UIImagePickerMediaPickedEventArgs args)
{
UIImage image = args.EditedImage ?? args.OriginalImage;
if (image != null)
{
// Convert UIImage to .NET Stream object
NSData data;
if (args.ReferenceUrl.PathExtension.Equals("PNG") || args.ReferenceUrl.PathExtension.Equals("png"))
{
data = image.AsPNG();
}
else
{
data = image.AsJPEG(1);
}
Stream stream = data.AsStream();
UnregisterEventHandlers();
Dictionary<string, Stream> dic = new Dictionary<string, Stream>();
dic.Add(args.ImageUrl.ToString(), stream);
// Set the Stream as the completion of the Task
taskCompletionSource.SetResult(dic);
}
else
{
UnregisterEventHandlers();
taskCompletionSource.SetResult(null);
}
imagePicker.DismissModalViewController(true);
}
void OnImagePickerCancelled(object sender, EventArgs args)
{
UnregisterEventHandlers();
taskCompletionSource.SetResult(null);
imagePicker.DismissModalViewController(true);
}
void UnregisterEventHandlers()
{
imagePicker.FinishedPickingMedia -= OnImagePickerFinishedPickingMedia;
imagePicker.Canceled -= OnImagePickerCancelled;
}
}
}
in Android
in MainActivity
public class MainActivity : FormsAppCompatActivity
{
...
// Field, property, and method for Picture Picker
public static readonly int PickImageId = 1000;
public TaskCompletionSource<Dictionary<string,Stream>> PickImageTaskCompletionSource { set; get; }
protected override void OnActivityResult(int requestCode, Result resultCode, Intent intent)
{
base.OnActivityResult(requestCode, resultCode, intent);
if (requestCode == PickImageId)
{
if ((resultCode == Result.Ok) && (intent != null))
{
Android.Net.Uri uri = intent.Data;
Stream stream = ContentResolver.OpenInputStream(uri);
Dictionary<string, Stream> dic = new Dictionary<string, Stream>();
dic.Add(uri.ToString(), stream);
// Set the Stream as the completion of the Task
PickImageTaskCompletionSource.SetResult(dic);
}
else
{
PickImageTaskCompletionSource.SetResult(null);
}
}
}
}
[assembly: Dependency(typeof(PhotoPickerService))]
namespace xxx.Droid
{
public class PhotoPickerService : IPhotoPickerService
{
public Task<Dictionary<string,Stream>> GetImageStreamAsync()
{
// Define the Intent for getting images
Intent intent = new Intent();
intent.SetType("image/*");
intent.SetAction(Intent.ActionGetContent);
// Start the picture-picker activity (resumes in MainActivity.cs)
MainActivity.Instance.StartActivityForResult(
Intent.CreateChooser(intent, "Select Picture"),
MainActivity.PickImageId);
// Save the TaskCompletionSource object as a MainActivity property
MainActivity.Instance.PickImageTaskCompletionSource = new TaskCompletionSource<Dictionary<string,Stream>>();
// Return Task object
return MainActivity.Instance.PickImageTaskCompletionSource.Task;
}
}
}
invoke it
Dictionary<string, Stream> dic = await DependencyService.Get<IPhotoPickerService>().GetImageStreamAsync();
Stream stream;
string path;
foreach ( KeyValuePair<string, Stream> currentImage in dic )
{
stream = currentImage.Value;
path = currentImage.Key;
label.Text = path;
if (stream != null)
{
image.Source = ImageSource.FromStream(() => stream);
}
}
Update
If you want to get the path , you could invoke
Dictionary<string, Stream> dic = new Dictionary<string, Stream>();
dic.Add(uri.Path, stream);
Help me find the error in the code
My MainActivity:
string CHANNEL_ID = "MyChannel";
protected override void OnCreate(Bundle savedInstanceState)
{
....
...
CreateNotificationChannel();
LoadApplication(new App());
}
public void CreateNotification(string SetContentTitle, string SetContentText)
{
var builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.SetContentTitle(SetContentTitle)
.SetContentText(SetContentText)
.SetChannelId(CHANNEL_ID)
.SetSmallIcon(Resource.Drawable.icon);
// Finally, publish the notification:
var notificationManager = NotificationManagerCompat.From(this);
// Get the notification manager:
// NotificationManager notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
// Publish the notification:
int notificationId = 1000;
notificationManager.Notify(notificationId, builder.Build());
}
void CreateNotificationChannel(){
if (Build.VERSION.SdkInt<BuildVersionCodes.O)
{
// Notification channels are new in API 26 (and not a part of the
// support library). There is no need to create a notification
// channel on older versions of Android.
return;
}
string name = "MyName";
var description = "desc";
var channel = new NotificationChannel(CHANNEL_ID, name, NotificationImportance.High)
{
Description = description
};
var notificationManager = (NotificationManager)GetSystemService(NotificationService);
notificationManager.CreateNotificationChannel(channel);
}
and I have a class in which when I need I start displaying local notifications using the code below
var urlOb = new MainActivity();
urlOb.CreateNotification(titleback, textback);
I think I did everything right, but local notifications are not shown.
You can call the method in other activity
public static MainActivity instance;
In the method onCreate
//...
base.OnCreate(savedInstanceState);
instance = this;
And you can call it in other method
MainActivity.instance.CreateNotification(titleback, textback);
I am trying to use Xamarin.Auth for a Facebook signin. It's all set up, but I am missing the last part. The Facebook signin is not my MainActivity, one has to click on a button in order to sign in. I don't know how to start the page for the signin. I have trying to follow this approach, but as my MainActivity isn't the Facebook signin page, it won't work. I have binded (I am following the MVVM pattern) the signin button and have implemented an interface in order to use DependencyService. My problem is when I have to implement the code of the platforms.
This is what I have tried on Android:
class LoginFBImpl : Activity, ILoginFB, IFacebookAuthenticationDelegate
{
public void LoginFB() //the method in the interface
{
var auth = new FacebookAuthenticator(FacebookAuthenticator.ClientId, FacebookAuthenticator.Scope, this);
var authenticator = auth.GetAuthenticator();
var intent = authenticator.GetUI(this);
StartActivity(intent); //Problem occurs here
}
public async void OnAuthenticationCompletedAsync(UserModel token)
{
var facebookService = new FacebookService();
var name = await facebookService.GetNameAsync(token.AccessToken);
var id = await facebookService.GetIdAsync(token.AccessToken);
var picture = await facebookService.GetPictureAsync(token.AccessToken);
}
public void OnAuthenticationCancelled()
{
}
public void OnAuthenticationFailed(string message, Exception exception)
{
}
}
iOS:
public class LoginFBImpl : UIViewController, ILoginFB, IFacebookAuthenticationDelegate
{
public void LoginFB()
{
var auth = new FacebookAuthenticator(FacebookAuthenticator.ClientId, FacebookAuthenticator.Scope, this);
var authenticator = auth.GetAuthenticator();
var viewController = authenticator.GetUI();
PresentViewController(viewController, true, null);
}
public async void OnAuthenticationCompletedAsync(UserModel token)
{
DismissViewController(true, null);
var facebookService = new FacebookService();
var name = await facebookService.GetNameAsync(token.AccessToken);
var id = await facebookService.GetIdAsync(token.AccessToken);
var picture = await facebookService.GetPictureAsync(token.AccessToken);
}
public void OnAuthenticationFailed(string message, Exception exception)
{
DismissViewController(true, null);
var alertController = new UIAlertController
{
Title = message,
Message = exception?.ToString()
};
PresentViewController(alertController, true, null);
}
public void OnAuthenticationCancelled()
{
DismissViewController(true, null);
var alertController = new UIAlertController
{
Title = "Authentication cancelled",
Message = "You didn't complete the authentication process"
};
PresentViewController(alertController, true, null);
}
}
I think it has something to do with the Activity/ViewController, but I don't know how to do it properly. When I run this I get: java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.ActivityThread$ApplicationThread android.app.ActivityThread.getApplicationThread()' on a null object reference on Android, and I am expecting something similar on iOS - Haven't tested it yet as I am working on Windows.
This is going to be a long post! (grab a cup of coffee/popcorn)
I am using AltBeacon Xamarin sample in my code to show the beacons.
I have come across this example in creating Notifications in Xamarin.
Here there's an Application class where the core logic goes.
public class AltBeaconSampleApplication : Application, IBootstrapNotifier
{
private const string TAG = "AltBeaconSampleApplication";
BeaconManager _beaconManager;
private RegionBootstrap regionBootstrap;
private Region _backgroundRegion;
private BackgroundPowerSaver backgroundPowerSaver;
private bool haveDetectedBeaconsSinceBoot = false;
private string nearbyMessageString = "A beacon is nearby.";
private string nearbyTitleString = "AltBeacon Reference Application";
private MainActivity mainActivity = null;
public MainActivity MainActivity
{
get { return mainActivity; }
set { mainActivity = value; }
}
private NotificationActivity notificationActivity = null;
public NotificationActivity NotificationActivity
{
get { return notificationActivity; }
set { notificationActivity = value; }
}
public AltBeaconSampleApplication() : base() { }
public AltBeaconSampleApplication(IntPtr javaReference, Android.Runtime.JniHandleOwnership transfer) : base(javaReference, transfer) { }
public override void OnCreate()
{
base.OnCreate();
_beaconManager = BeaconManager.GetInstanceForApplication(this);
var iBeaconParser = new BeaconParser();
// Estimote > 2013
iBeaconParser.SetBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24");
_beaconManager.BeaconParsers.Add(iBeaconParser);
Log.Debug(TAG, "setting up background monitoring for beacons and power saving");
// wake up the app when a beacon is seen
_backgroundRegion = new Region("backgroundRegion", null, null, null);
regionBootstrap = new RegionBootstrap(this, _backgroundRegion);
// simply constructing this class and holding a reference to it in your custom Application
// class will automatically cause the BeaconLibrary to save battery whenever the application
// is not visible. This reduces bluetooth power usage by about 60%
backgroundPowerSaver = new BackgroundPowerSaver(this);
PerformHttpRequest();
}
public void DidDetermineStateForRegion(int state, AltBeaconOrg.BoundBeacon.Region region)
{
}
public async void PerformHttpRequest()
{
try
{
using (var client = new HttpClient())
{
var uri = "http://exampleuri";
var result = await client.GetStringAsync(uri);
var response = JsonConvert.DeserializeObject<BeaconURL>(result);
SendNotificationFromBeacon(response);
}
}
catch(Exception ex)
{
throw ex;
}
}
private void SendNotificationFromBeacon(BeaconURL receivedNotification)
{
// Setup an intent for SecondActivity:
Intent notificationIntent = new Intent(this, typeof(NotificationActivity));
// Pass some information to SecondActivity:
notificationIntent.PutExtra("CompaignUrl", receivedNotification.CompaignUrl);
notificationIntent.PutExtra("MediaUrl", receivedNotification.MediaUrl);
notificationIntent.PutExtra("titleText", receivedNotification.Title);
notificationIntent.SetFlags(ActivityFlags.NewTask);
// Create a task stack builder to manage the back stack:
Android.App.TaskStackBuilder stackBuilder = Android.App.TaskStackBuilder.Create(this);
// Add all parents of SecondActivity to the stack:
stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(NotificationActivity)));
// Push the intent that starts SecondActivity onto the stack:
stackBuilder.AddNextIntent(notificationIntent);
// Obtain the PendingIntent for launching the task constructed by
// stackbuilder. The pending intent can be used only once (one shot):
const int pendingIntentId = 0;
PendingIntent pendingIntent =
stackBuilder.GetPendingIntent(pendingIntentId, PendingIntentFlags.OneShot);
// Instantiate the builder and set notification elements, including
// the pending intent:
var builder =
new NotificationCompat.Builder(this)
.SetContentTitle(receivedNotification.Title)
.SetContentText(receivedNotification.Text)
.SetSmallIcon(Android.Resource.Drawable.IcDialogInfo);
// Build the notification:
Notification notification = builder.Build();
// Get the notification manager:
NotificationManager notificationManager =
GetSystemService(Context.NotificationService) as NotificationManager;
// Publish the notification:
const int notificationId = 0;
notificationManager.Notify(notificationId, notification);
}
}
BeaconURL is a POCO class
NotificationActivity is a basic Activity class.
I perform the HttpClient request and get data. I create a notification and present it on my screen. It goes like this
Now when I tap on the notification, I dont go to the NotificationActivity. I am trying to invoke an activity from an ApplicationClass. Is this the right way to perform such stuff. Kindly provide details.
Thanks.
Edit: Added NotificationActivity Class
[Activity(Label = "NotificationActivity")]
public class NotificationActivity : MainActivity
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
SetContentView(Resource.Layout.NotificationLayout);
TextView titleTextView = FindViewById<TextView>(Resource.Id.txtTitle);
titleTextView.Text = Intent.Extras.GetString("titleText", "");
ImageView mediaImage = FindViewById<ImageView>(Resource.Id.imgViewMedia);
mediaImage.SetImageBitmap(GetImageBitmapFromUrl(Intent.Extras.GetString("MediaUrl", "")));
}
private Bitmap GetImageBitmapFromUrl(string url)
{
Bitmap imageBitmap = null;
using (var webClient = new WebClient())
{
var imageBytes = webClient.DownloadData(url);
if (imageBytes != null && imageBytes.Length > 0)
{
imageBitmap = BitmapFactory.DecodeByteArray(imageBytes, 0, imageBytes.Length);
}
}
return imageBitmap;
}
}
First thing you need to do is to set the your pending intent within the notification builder, it will get your NotificationActivity launching:
var builder =
new NotificationCompat.Builder(this)
.SetContentTitle("receivedNotification.Title")
.SetContentText("receivedNotification.Text")
.SetSmallIcon(Android.Resource.Drawable.IcDialogInfo)
.SetContentIntent(pendingIntent);
The second will be to get your back stack setup, from what you posted I'm not sure what the flow should be as the user will exit the app if they use the back button.
If you want the user to go back to the MainActivity when that press the back button, then you can add a ParentActivity to your NotificationActivity activity attribute, i.e.:
[Activity(Label = "NotificationActivity", ParentActivity = typeof(MainActivity))]
And thus the line:
stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(NotificationActivity)));
Would add the MainActivity to the back stack.
How can I set a GTK+ 3 widget in Vala as a drag and drop target for external items? More specifically, I'd like to allow a user to drag movie files from a file manager into my application, so that I can get the dropped file's name, or if the user drags a directory, the filenames of the directory contents.
It is explained here:
https://laptrinhx.com/vala-9-drag-drop-3521859046/
using Gtk;
public class MainWindow : Gtk.Window
{
private Box vboxMain;
private ScrolledWindow swFiles;
private TreeView tvFiles;
private TreeViewColumn colName;
private const Gtk.TargetEntry[] targets = {
{"text/uri-list",0,0}
};
public static int main (string[] args)
{
Gtk.init(ref args);
var window = new MainWindow ();
window.show_all ();
Gtk.main();
return 0;
}
public MainWindow ()
{
this.title = "Drag files on this window";
this.window_position = WindowPosition.CENTER;
this.destroy.connect (Gtk.main_quit);
set_default_size (550, 400);
//vboxMain
vboxMain = new Box (Orientation.VERTICAL, 6);
vboxMain.margin = 6;
add (vboxMain);
//tvFiles
tvFiles = new TreeView();
//swFiles
swFiles = new ScrolledWindow(tvFiles.get_hadjustment (), tvFiles.get_vadjustment ());
swFiles.set_shadow_type (ShadowType.ETCHED_IN);
swFiles.set_size_request (550, 400);
swFiles.add(tvFiles);
vboxMain.add(swFiles);
//colName
colName = new TreeViewColumn();
colName.title ="File";
colName.expand = true;
CellRendererText cellName = new CellRendererText ();
colName.pack_start (cellName, false);
colName.set_attributes(cellName, "text", 0);
tvFiles.append_column(colName);
//inputStore
Gtk.ListStore store = new Gtk.ListStore (1, typeof (string));
tvFiles.model = store;
//connect drag drop handlers
Gtk.drag_dest_set (this,Gtk.DestDefaults.ALL, targets, Gdk.DragAction.COPY);
this.drag_data_received.connect(this.on_drag_data_received);
}
private void on_drag_data_received (Gdk.DragContext drag_context, int x, int y,
Gtk.SelectionData data, uint info, uint time)
{
//loop through list of URIs
foreach(string uri in data.get_uris ()){
string file = uri.replace("file://","").replace("file:/","");
file = Uri.unescape_string (file);
//add file to tree view
add_file (file);
}
Gtk.drag_finish (drag_context, true, false, time);
}
private void add_file(string file)
{
TreeIter iter;
Gtk.ListStore store = (Gtk.ListStore) tvFiles.model;
store.append (out iter);
store.set (iter, 0, file);
}
}
Build with valac dnd.vala --pkg gtk+-3.0