animated_icon.cpp

Siemens 的SIMpad是一个多媒体设备

#include <FL/Fl.H>
#include <stdio.h>
#include "Animated_Icon.h"

#define TRUE 1
#define FALSE 0

Animated_Icon::Animated_Icon(int x, int y, int w, int h, const char *l = 0) :
	Fl_Box(x, y, w, h, l)
{
	first = current = 0;
	running_ = 0;
	run_once = FALSE;
}
//-----------------------------------------------------------------------------
Animated_Icon::~Animated_Icon()
{
	icon_list *l, *n;

	stop();
	l = first;
	while (l) {
		n = l->next;
		delete l->icon;
		delete l;
		l = n;
	}
}
//-----------------------------------------------------------------------------
void Animated_Icon::add(Fl_Pixmap *pm, float d)
{
	icon_list *l = new icon_list;
	l->icon = pm;
	l->delay = d;
	l->next = 0;
	
	if (first == 0) 
	{
	   first = current = l;
	} else 
	{
	   l->next = current->next;
	   current->next = l;
	   current = l;
	}
}
//-----------------------------------------------------------------------------
void Animated_Icon::icon_cb(Animated_Icon *a)
{
	icon_list *current = a->current;
	if (current->next == 0) 
	{
	   if(a->run_once == TRUE)
	     a->stop();
	   else
	     current = a->first;
	} else 
	{
	   current = current->next;
	}
	a->current = current;
	current->icon->label(a);
	a->redraw();
	Fl::add_timeout(current->delay,
		(void (*)(void *))Animated_Icon::icon_cb, (void *)a);
}
//-----------------------------------------------------------------------------
void Animated_Icon::start()
{
	if (current == 0) {
		return;
	}
	current->icon->label(this);
	redraw();
	Fl::add_timeout(current->delay,
		(void (*)(void *))icon_cb, (void *)this);
	running_ = 1;
}
//-----------------------------------------------------------------------------
void Animated_Icon::stop()
{
	Fl::remove_timeout((void (*)(void *))icon_cb, (void *)this);
	running_ = 0;
}
//-----------------------------------------------------------------------------
void Animated_Icon::set(int n)
{
	icon_list *l = first;

	if (n < 0 || l == 0) return;

	while (n--) {
		l = l->next;
		if (l == 0) return;
	}

	l->icon->label(this);
	current = l;
}
//-----------------------------------------------------------------------------