How to improve the MAUI Button responsiveness in a "this.Dispatcher.Dispatch" thread?

Marc George 171

I have a MAUI application with two "this.Dispatcher.Dispatch"ed NavigationPages launched from the App class, both of which have two ImageButtons both of which have extremely poor responsiveness as compared to the buttons of other NavigationPages which are launched from the MasterPage class.

I know they are enabled because if I tap them quickly and numerously, eventually they will respond. I have tried the three types of events for them with the same result. It appears that the "clicking" period is very short but repetitive.

Is there a way to improve their responsiveness? Focusing doesn't seem to be effective.

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,571 Reputation points Microsoft Vendor

2023-03-28T07:41:31.45+00:00
I have a MAUI application with two "this.Dispatcher.Dispatch"ed NavigationPages launched from the App class, both of which have two ImageButtons both of which have extremely poor responsiveness as compared to the buttons of other NavigationPages which are launched from the MasterPage class.

When you open the NavigationPages in the thread, is the performance poor?

If so, when you open the NavigationPages, please Run code on the UI thread

MainThread.BeginInvokeOnMainThread(() => { // Code to run on the main thread Navigation.PushAsync(new Masterpage()); });

If above method is not working, could you share following details?

Could you minimize code to just what is needed to reproduce the problem? Which platform is not working when running code?
Marc George 171 Reputation points

2023-03-29T00:30:00.2+00:00

I attempted using the function you provided, but the results remained the same.

FYI, I originally had been using Maui.ApplicationModel.MainThread.BeginInvokeOnMainThread before trying Dispatcher.Dispatch when reading that it was being deprecated in my search for a solution.

I have started creating a project based on the current to demonstrate the issue, but I will not be able to complete it until early next week. I have a business trip starting tomorrow.
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,571 Reputation points Microsoft Vendor

2023-03-29T06:42:20.7366667+00:00

BeginInvokeOnMainThread is not deprecated. You can check this document MainThread.BeginInvokeOnMainThread(Action) Method

I have started creating a project based on the current to demonstrate the issue, but I will not be able to complete it until early next week. I have a business trip starting tomorrow.

You can post demo when you feel free.
Marc George 171 Reputation points

2023-04-06T15:03:56.9066667+00:00

Requested example project attached as a text file. Rename to a Zip file and extract. TestApp.txt Click the button on the main page to activate the minimized version of one of the two pages with the issue. At the bottom of the page are Yes and No buttons; otherwise, the page is blank. The code has breakpoints at the called functions. In my testing, neither are called.
Marc George 171 Reputation points

2023-04-11T20:17:29.63+00:00

Did the example project demonstrate the issue for you?
Marc George 171 Reputation points

2023-04-20T01:28:09.8166667+00:00

In discussing the issue with a colleague, in comparing the use of other button controls not displaying the problem in the application to the buttons do so, I realized that what might be not apparent is the pages which have the problem are not initialize by another page already on the UI thread, but by a process running on a different thread calling the app class function which makes NavigationPage calls from that function that are wrapped with the MainThread.BeginInvokeOnMainThread function.

1 answer

Marc George 171 Reputation points

2023-04-20T17:04:31.2133333+00:00

The issue was caused by the fact that the "Clicked" button clickable surface area is not associated with the size of the button, but the settings of the "RequestedHeight" and "RequestedWidth" button parameters. The default values on my devices were 2.5. Setting the parameters to the height of the containing row resolved the issue.
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Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,571 Reputation points Microsoft Vendor

2023-05-11T02:15:44.04+00:00

Thanks for your sharing.
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