Button functions

[Darren2308]

Hi Everyone

Basically I have created a music programme and need a button (Demo) that when pressed displays various notes and text in an edit box. This part I can do. However I need to, if it is possible, to be able to press the button again and this time it would display another set of notes/text. So basically how do you go about giving a button a multipurpose function

many thanks

Darren

[cilu]

Well, you can do it in various ways. The idea is that you should keep track of the state.

For instance, suppose m_showSet1 is a bool variable, member of the class.

void CYourDialog::OnButton()
{
   if(m_showSet1)
   {
      // show the first set
   }
   else
   {
      // show the second set
   }
   m_showSet1 = !m_showSet1;
}

If you need to show more sets, you can adapt this, using an int instead of bool, or an enum. I hope you figured the idea.

[Darren2308]

Well, you can do it in various ways. The idea is that you should keep track of the state.

For instance, suppose m_showSet1 is a bool variable, member of the class.

void CYourDialog::OnButton()
{
   if(m_showSet1)
   {
      // show the first set
   }
   else
   {
      // show the second set
   }
   m_showSet1 = !m_showSet1;
}

If you need to show more sets, you can adapt this, using an int instead of bool, or an enum. I hope you figured the idea.

So if I wanted about 4 different options I would use int? would I use just one or would you need 4 of these? Also after the 4 if it was presses a 5th time how would you set it to go back to click 1 ( the first demo )

thanks

[cilu]

Well, Why not thinking a little bit for yourself? Think sequences: 0, 1, 2, 3, 4, 0, 1, 2, 3, 4... Does that ring any bells?

[unnamed]

If you want different contents at different clicks, why can't you consider (rand() % UB); Where 'UB' is the upper bound.

[Darren2308]

sort of. I am VERY new to C++. Only been using it for a few weeks, so all is very foreign to me. So any specfic help from anyone would be greatfully received

Darren

[TheCPUWizard]

Well, Why not thinking a little bit for yourself? Think sequences: 0, 1, 2, 3, 4, 0, 1, 2, 3, 4... Does that ring any bells?

Classic Waltz for a Mayan Indain????

[The Olmec and Maya civilization used zero as a separate number as early as 1st century BC]

[unnamed]

switch(rand() % 5)
{
case 1: //// show the first set
break;

case 2: //// show the second set
break;

case 3: //// show the fourth set
break;

case4: //// show the fourth set
break;


}

[Darren2308]

switch(rand() % 5)
{
case 1: //// show the first set
break;

case 2: //// show the second set
break;

case 3: //// show the fourth set
break;

case4: //// show the fourth set
break;


}

This does make more sense but how does one g oabout making a button have a switch statement?

[cilu]

The button doesn't have a switch statement. But the button click event has a handler. You put the switch in the handler. Do you know how to create that?

[Darren2308]

The button doesn't have a switch statement. But the button click event has a handler. You put the switch in the handler. Do you know how to create that?

um no not really...please do explain.....sorruy this must be very annoying...but like I said I am still getting used to it all.

[unnamed]

Double click on the button and an event handler will be created by the Visual Studio.

[Darren2308]

void CU6b82Dlg::OnDemo()

{

switch(rand() % 5)

{
case 1: m_Sequence="BBB";
break;

case 2: m_Sequence="AAA";
break;

case 3: m_Sequence="CDEF";
break;

case 4: m_Sequence="abcde";
break;


}
}

I have done this...However it doesnt work..does the 'switch(rand() % 5)' have to be changed?

[cilu]

Well, what should happen? What doesn't work? In this function you are setting the value of a variable, m_Sequence? Where is it supposed to be used? You you want to show it's content somewhere? You have to explain that.

[Darren2308]

basically i have 4 edit boxes. When I press demo I want the text i preset in the function to appear. For example clicked once i may wish for ABCD to appear in edit box one (m_Sequence).Then pressed again I may want DACB to appear in edit box one (m_Sequence) and DEFG in edit box two (m_Sequence2)...and so on

this make sense?