gui in c#

Mon, 16 Jan 2006 02:36:22 -0700

hi i have gui with two buttons

button1 button2

when i press button1 the programs starts loop

for (;)
dosomthing(var)

i want to press button2 and then that var will be changed the problem is during the run the button 2 seems locked i want to press several time button2 and see thing changing
should i define somthing about button2 or for the gui

thanks

Re: gui in c#

Mon, 16 Jan 2006 08:37:05 -0700

: hi i have gui with two buttons
:
: button1 button2
:
: when i press button1 the programs starts loop
:
: for (;)
: dosomthing(var)
:
: i want to press button2 and then that var will be changed the problem is during the run the button 2 seems locked i want to press several time button2 and see thing changing
: should i define somthing about button2 or for the gui
:
: thanks
:

As long as a loop is looping, the program will not respond, because the eventmessage loop(the code which handles MouseClick etc.; automatic generated) can't continue looping. You have to give your program time to react on events.

I always use a Timer based loop:
- declare the variables used in the "for"-loop as privates of the Form.
- put the "dosomthing"-code in the Timer_Tick

If the "dosomthing"-code needs no much time and you have to run the loop fast, you can also put the "dosomthing"-code between a "timestoper"-loop:

object var = GIVEmeTHEstartVAR(); // your var classwide available

Timer.Interval = 1; // choose like you want

void Button1_Click()
{
    // start and stop the loop
    if(Timer.Enabled)
        Timer.Stop();
    else
        Timer.Start();
}

void Button2_Click()
{
    // change var even while loop is looping
    var = GIVEmeAotherVAR(var);
}

void Timer_Tick()
{
    // "timestoper"-loop, ends than "dosomething"-code ran enough for this step( 50 ms )
    DateTime DT = DateTime.Now;
    while((DateTime.Now - DT).TotalMilliseconds < 50)
    {
        DOsomething(var);
        DOevenMORE();
    }
    // the loop step ends and the program can respond to other events, like Button1_Click, Button2_Click or Form_Close
    // After Timer.Intervall-Milliseconds the Timer_Tick is going to run again
}

Maybe there is a more elegant or difficult(multithreading) method, but this works and is fast.

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