Category : C Source Code
Archive   : DFPP03.ZIP
Filename : RADIO.CPP

// ------------- radio.cpp

#include "radio.h"
#include "desktop.h"

RadioButton::RadioButton(const char *lbl, int lf, int tp,
DFWindow *par) : Button(lbl, lf, tp, par)
{
windowtype = RadioButtonWindow;
setchar = 7;
}

void RadioButton::InvertButton()
{
PushButton();
}

void RadioButton::PushButton()
{
int ht = desktop.screen().Height();
DFWindow **rd = new DFWindow *[ht];
for (int i = 0; i < ht; i++)
rd[i] = 0;
// - build a table of radio buttons at the same x coordinate
DFWindow *sib = Parent()->First();
while (sib != 0) {
if (sib->WindowType() == RadioButtonWindow) {
if (sib->Left() == Left()) {
int tp = sib->Top();
if (tp < ht)
rd[tp] = sib;
}
}
sib = sib->Next();
}
// ----- find the start of the radiobutton group
i = Top();
while (i >= 0 && rd[i] != 0)
--i;
// ---- ignore everthing before the group
while (i >= 0)
rd[i--] = 0;
// ----- find the end of the radiobutton group
i = Top();
while (i < ht && rd[i] != 0)
i++;
// ---- ignore everthing past the group
while (i < ht)
rd[i++] = 0;
// ------ release all the radio buttons in the group
for (i = 0; i < ht; i++)
if (rd[i] != 0)
((RadioButton *)rd[i])->ReleaseButton();
delete [] rd;
// ----- set the chosen radio button
Button::PushButton();
}