How do I make an application that refreshes automatically an in real time

Question

0.00/5 (No votes)

See more:

I have a program that I created in Vb.net.
This program is a timer calculator for PIC micro-controllers.

Now,there are trackbar controls, text boxes, radio buttons and other controls on the GUI.
When one control is changed, as per the user's input, a text box showing an output program is updated in real time.

I used the <xxxxx>Changed event for the controls, eg TextChanged, SelectedIndexChanged and CheckedChanged events based on whether the control is a textbox, combobox or radiobutton.

I would hardwire all these events to fire into one function where i would first determine the sender, and then execute the appropriate code.

I assume there is a better, more efficient way to do this, How can i do it?

Thank you

Posted 8-Dec-14 5:30am

frankboyd

Add a Solution

Comments

[no name] 8-Dec-14 11:51am

What PicKit version are you using, and can you give more detail on your project, like; will your hardware be reliant on your software. Ie constantly connected?

frankboyd 9-Dec-14 3:07am

@CodingK, the question I am asking would actually have no bearing on the tools used for the actual programming of the PIC. It's really more of a GUI problem than PICs themselves. I mentioned the PIC for completeness of the question.

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

prathameshpitale · Answer 1 · 2014-12-08T05:52:00

Solution 1

As i understand you have multiple controls, whose values changes when a parent or previous control's values changes.

You can create a function with an object parameter

VB

sub (ByVal e as Object)

' all your code here.
' combine all the code here written in TextChanged, SelectedIndexChanged and CheckedChanged events

you can use e to identify the source

end sub.

Now call this function from every TextChanged, SelectedIndexChanged and CheckedChanged events.

Posted 8-Dec-14 5:52am

prathameshpitale

Comments

frankboyd 9-Dec-14 3:31am

@prathameshpitale , that is exactly what I did. I grouped the handlers of similar controls, e.g. radio buttons selecting clock frequency, and wired them to one function.

I had pre-assigned a value to the ".Tag" property of each of the controls, and in the event handler, I would simply extract the value of the ".Tag" property of the current sender, and use it, so I didn't need to use a switch statement.

This works well. I just wonder if there isn't a better way, maybe something built into the framework?

OriginalGriff · Answer 2 · 2014-12-08T05:54:00

Solution 2

I would probably not wire them all to the same handler: simply because it takes time to "sort out" which control type generated the event - you can't use a switch, so you have to say "if (trackbar) then ... else if (textbox) then ..." and so forth.
Instead, I'd use a different handler for each control class, and then pass the relevant info to a "generic" updater.

Posted 8-Dec-14 5:54am

OriginalGriff

Comments

frankboyd 9-Dec-14 3:47am

@OriginalGriff, I had pre-assigned a value to the ".Tag" property of each of the controls, and in the event handler, I would simply extract the value of the ".Tag" property of the current sender, and use it, so I didn't need to use a switch statement.

The idea of a generic updater seems very extensible. As it stands, using teh .Tag property means that I cannot change the current tag data without changing how the event handler handles the sender events.

How would I go about this generic updater, and from which function/event handler would I call it from. This is an event driven app.

Is there a better way, that allows scalability and extensibility of the program?