mirror of
https://github.com/dyne/FreeJ.git
synced 2026-02-06 04:59:16 +01:00
144 lines
3.1 KiB
JavaScript
144 lines
3.1 KiB
JavaScript
// freej script for a simple text scroller
|
|
// it makes smart use of arrays as FIFO pipes
|
|
// and the file_to_strings(filename) function
|
|
// to read a text file into an array of strings
|
|
|
|
// (C)2005 Denis Jaromil Rojo - GNU GPL
|
|
|
|
W = 640;
|
|
H = 480;
|
|
|
|
set_resolution(W, H);
|
|
set_fps(25);
|
|
|
|
wordspacing = 5;
|
|
|
|
// setup the keyboard quit
|
|
running = true;
|
|
kbd = new KeyboardController();
|
|
kbd.released_esc = function() { running = false; }
|
|
register_controller( kbd );
|
|
|
|
// read a text file into an array
|
|
words = file_to_strings("test.txt");
|
|
|
|
// debug
|
|
echo ( words.length + " words read" );
|
|
|
|
idx = 0;
|
|
// words.length property says how big it is
|
|
// access words with words[0] words[1] and so on
|
|
|
|
|
|
// make a black background
|
|
/*
|
|
background = new GeometryLayer();
|
|
background.color(0x00000000);
|
|
background.set_blit("alpha");
|
|
background.set_blit_value(0.2);
|
|
background.rectangle(0, 0, background.w(), background.h() );
|
|
add_layer( background );
|
|
*/
|
|
|
|
// setup the array of rendered words
|
|
// each one is a TextLayer object
|
|
scroll = new Array();
|
|
|
|
/*
|
|
scroll[] is an Array object
|
|
we will use it as a FIFO pipe, thru the push() and shift()
|
|
methods of javascript arrays:
|
|
|
|
t(n): scroll.push( txt ) pushes in text from the right (here below)
|
|
array scroll [ 0 ] [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] _/
|
|
screen -> | <- bla - bla - bla - bla - bla - bla - | <- screen
|
|
|
|
t(n+1):
|
|
[ 0 ] | <- [ 1 ] - [ 2 ] - [ 3 ] ...
|
|
scroll.shift() returns scroll[0] (which we delete)
|
|
|
|
so let's go on...
|
|
*/
|
|
|
|
function render_word(wrd) {
|
|
|
|
lay = new TextLayer();
|
|
|
|
lay.set_fps(25);
|
|
|
|
lay.start();
|
|
|
|
add_layer( lay ); // add it to the screen
|
|
|
|
lay.set_position( W, 400 ); // start from the right of the scree
|
|
|
|
lay.print( wrd ); // print the string in the layer
|
|
|
|
lay.size( 50 ); // set the size
|
|
|
|
// lay.slide_position( 0 - lay.w() , 200, 2); // slide to the right
|
|
|
|
return lay;
|
|
}
|
|
|
|
// MAIN
|
|
|
|
// create a new TextLayer with the word
|
|
txt = render_word( words[idx] );
|
|
|
|
// append it as last element of the scroll[] array
|
|
scroll.push( txt );
|
|
|
|
// advance the index of words
|
|
idx++;
|
|
|
|
trigger = new TriggerController();
|
|
register_controller( trigger );
|
|
trigger.frame = function() {
|
|
|
|
|
|
// slide all to the left
|
|
for(i=0; i<scroll.length; i++) {
|
|
echo("- " + i + " is at " + scroll[i].x() + "x" + scroll[i].y());
|
|
|
|
scroll[i].set_position( scroll[i].x() - 2, scroll[i].y() );
|
|
echo("- " + i + " now at " + scroll[i].x() + "x" + scroll[i].y());
|
|
|
|
}
|
|
|
|
|
|
// check if the leftmost is out of screen
|
|
if( scroll[0].x() + scroll[0].w() < 0) {
|
|
// pull it out from the array
|
|
txt = scroll.shift();
|
|
// remove it from the screen
|
|
rem_layer( txt );
|
|
// delete it
|
|
delete txt;
|
|
}
|
|
|
|
|
|
// check if the rightmost all entered the screen
|
|
rightmost = scroll[ scroll.length -1 ];
|
|
if( rightmost.x() + rightmost.w() < W - wordspacing ) {
|
|
// then we need a new one on the left
|
|
|
|
if ( words[idx].length > 0 ) {
|
|
// create a new TextLayer with the word
|
|
txt = render_word( words[idx] );
|
|
|
|
// append it as last element of the scroll[] array
|
|
scroll.push( txt );
|
|
}
|
|
|
|
// advance the index
|
|
idx++;
|
|
}
|
|
|
|
// if the words are finished: stop
|
|
if(idx >= words.length)
|
|
this.frame = function() { };
|
|
|
|
}
|
|
|