Category : C++ Source Code
Archive   : CPP_GRPH.ZIP
Filename : LOTTO.CPP

#include "lotto.hpp"

Lotto::Lotto(int x, int y) :

HorizontalSelector(x, y,
"Lotto Ticket Randomizer",
0, 0, "", "", "", "", "", "")

{
// set the object state to inactive
lotto_state = 0;

// don't let any buttons get highlighted
number = -1;
button_selected = &number;

// show the first random picks
Refresh();
}

void Lotto::LeftButtonPressed()
{
// switch to active state, so the Update()
// function takes control
lotto_state = 1;

// hide all pick numbers
Clear();

// highlight all the buttons
for (int i = 0; i < MAX_LOTTO_BUTTONS; i++)
button [i]->Highlight();
}


void Lotto::LeftButtonReleased()
{
// switch to active state, so the Update()
// function takes control
lotto_state = 0;

// look up the next pick series
Refresh();
Display();

// unhighlight all the buttons
for (int i = 0; i < MAX_LOTTO_BUTTONS; i++)
button [i]->UnHighlight();
}

int Lotto::NextPick()
{
// roll the die again
float random = value.NextValue();

// convert to integer in the range (1..49)
return (random * 49) + 1;
}

void Lotto::Clear()
{
// refresh all the pick numbers
for (int i = 0; i < MAX_LOTTO_BUTTONS; i++) {
char string [20];
button [i]->SetLegend("?");
}
Display();
}

void Lotto::Refresh()
{
// refresh all the pick numbers
for (int i = 0; i < MAX_LOTTO_BUTTONS; i++) {
char string [20];
int new_pick = NextPick();
sprintf(string, "%d", new_pick);
button [i]->SetLegend(string);
}
}

void Lotto::MakeSound()
{
// get a random number
float random = value.NextValue();

// convert to frequency in range 100..2000 Hz
int frequency = (random * 1900) + 100;

// make a short sound
EventsHandler->SoundOn(frequency, 30);
}

void Lotto::Update()
{
if (lotto_state == 0) return;
MakeSound();
}