- The user interface thread appears to be frozen pingplotter code#
- The user interface thread appears to be frozen pingplotter windows#
Usually the HELLO greeting appears and freezes. When I turn on the TS-480 rig with the power on/off button the red light appears on the control RemoteRig box. Returns the SynchronizationContext for the main thread.After several connection attempts with my help My RemoteRig + TS-480 setup works almost perfectly. Invokes a Func> on the main thread, and waits for it to complete. Invokes an Action on the main thread, and waits for it to complete. Invokes a Func on the main thread, and waits for it to complete. The MainThread class includes the following additional static methods that can be used to interact with user interface elements from backgrounds threads: Method There is very little performance penalty if you call BeginInvokeOnMainThread when it's not really necessary. The platform implementations of BeginInvokeOnMainThread themselves check if the call is made on the main thread.
The user interface thread appears to be frozen pingplotter code#
You might suspect that this check might improve performance if the block of code is already running on the main thread. MainThread.BeginInvokeOnMainThread(MyMainThreadCode) You might wonder if you should check if code is running on a secondary thread before calling BeginInvokeOnMainThread, for example, like this: if (MainThread.IsMainThread) Code to run if this is a secondary thread
Code to run if this is the main thread A program can use this property to run different code for the main thread or a secondary thread: if (MainThread.IsMainThread) The IsMainThread property returns true if the code calling the property is running on the main thread.
The MainThread class also allows an application to determine if a particular block of code is running on the main thread. Determining if Code is Running on the Main Thread If not, MainThread.BeginInvokeOnMainThread(Action) Or not the calling code has any other need for a dependency on While you can use either method in a Xamarin.Forms app, consider whether That does the same thing as MainThread.BeginInvokeOnMainThread(Action). You can then run this method on the main thread by referencing it in the BeginInvokeOnMainThread method: MainThread.BeginInvokeOnMainThread(MyMainThreadCode) It is also possible to define a separate method for the code that must run on the main thread: void MyMainThreadCode() The argument is an Action object, which is simply a method with no arguments and no return value: MainThread.BeginInvokeOnMainThread(() => To run code on the main thread, call the static MainThread.BeginInvokeOnMainThread method. Running Code on the Main ThreadĪdd a reference to Xamarin.Essentials in your class: using Xamarin.Essentials To start using this API, read the getting started guide for Xamarin.Essentials to ensure the library is properly installed and set up in your projects. The MainThread class allows the application to run this code on the main thread. (The Xamarin.Essentials classes Accelerometer, Compass, Gyroscope, Magnetometer, and OrientationSensor all might return information on a secondary thread when used with faster speeds.) If the event handler needs to access user-interface elements, it must run that code on the main thread. The disadvantage of this model is that all code that accesses user interface elements must run on the application's main thread.Īpplications sometimes need to use events that call the event handler on a secondary thread of execution. This thread is often called the main thread or the user-interface thread or the UI thread. This model is necessary to properly serialize user-interface events, including keystrokes and touch input.
The user interface thread appears to be frozen pingplotter windows#
Most operating systems - including iOS, Android, and the Universal Windows Platform - use a single-threading model for code involving the user interface. The MainThread class allows applications to run code on the main thread of execution, and to determine if a particular block of code is currently running on the main thread.