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lightbar.js
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deuce authored***NOTE*** Current is the first item that had the returned retval, NOT necessarily the selected item (if the same retval is used by multiple items)
deuce authored***NOTE*** Current is the first item that had the returned retval, NOT necessarily the selected item (if the same retval is used by multiple items)
lightbar.js 8.37 KiB
/*
* Generic lightbar interface.
* $Id$
*/
//if(SYS_CLOSED==undefined)
load("sbbsdefs.js");
/*
* Lightbar object
* Properties:
* xpos: Horizontal position of lightbar menu (1-based)
* xpos: Vertical position of lightbar menu (1-based)
* items: an array of objects each having the following properties:
* text - The displayed text. A | prefixes a hotkey
* retval - The value to return if this is selected
* OPTIONAL Properties:
* width - The width of this item. If not specified, is the width of
* the text. Otherwise, the text is truncated or padded with
* spaces to fit the width.
* direction: 0 for vertical, 1 for horizontal.
* Horizontal menus always have one space of padding added between
* items.
* fg: Foreground colour of a non-current item
* bg: Background colour of a non-current item
* hfg: Foreground colour of a current item
* hbg: Background colour of a current item
* kfg: Hotkey forground colour for non-current item
* khfg: Hotkey foreground colour for current item
* current: Index of currently highlighted item (ToDo: This should be passed by reference (how?)!)
* align: If width is greater than the text length, a zero indicates the text
* should be left-aligned, a 1 indicates it should be right-aligned, and
* a 2 indicates it should be centered.
*/
function Lightbar(items)
{
this.fg=7;
this.bg=1;
this.xpos=1;
this.ypos=1;
this.direction=0;
this.hfg=1;
this.hbg=7;
this.kfg=15;
this.khfg=15;
this.current=0;
this.align=0;
this.getval=Lightbar_getval;
this.clear=Lightbar_clearitems;
this.add=Lightbar_additem;
if(items==undefined)
this.items=new Array();
else
this.items=items;
}
function Lightbar_additem(txt, retval, width)
{
var item=new Object;
if(txt==undefined) {
alert("Text of item undefined!");
return;
}
if(retval==undefined) {
alert("Retval of item undefined!");
return;
}
item.text=txt;
item.retval=retval; if(width!=undefined)
item.width=width;
this.items.push(item);
}
function Lightbar_clearitems()
{
this.items=new Array();
}
function Lightbar_getval(current)
{
var retval;
if(current!=undefined)
this.current=current;
retval=lightbar_func(this.xpos, this.ypos, this.items, this.direction, this.fg
, this.bg, this.hfg, this.hbg, this.kfg, this.khfg, this.current
, this.align);
if(retval==null) {
for(i=0; i<this.items.length; i++) {
if(this.items[i] != undefined && this.items[i].text != undefined) {
writeln((i+1)+": "+this.items[i].text);
}
}
write("Choose an option: ");
i=console.getnum(i);
if(this.items[i]==undefined)
return(null);
if(this.items[i].retval==undefined)
return(undefined);
retval=this.items[i].retval;
}
for(i=0; i<this.items.length; i++) {
if(retval==this.items[i].retval) {
this.current=i;
break;
}
}
return(retval);
}
/*
* Super-Overlord Lightbar function... draws and returns selected value.
* Parameters:
* xpos: Horizontal position of lightbar menu (1-based)
* xpos: Vertical position of lightbar menu (1-based)
* items: an array of objects each having the following properties:
* text - The displayed text. A | prefixes a hotkey
* retval - The value to return if this is selected
* OPTIONAL Properties:
* width - The width of this item. If not specified, is the width of
* the text. Otherwise, the text is truncated or padded with
* spaces to fit the width.
* direction: 0 for vertical, 1 for horizontal.
* Horizontal menus always have one space of padding added between
* items.
* fg: Foreground colour of a non-current item
* bg: Background colour of a non-current item
* hfg: Foreground colour of a current item
* hbg: Background colour of a current item
* kfg: Hotkey forground colour for non-current item
* khfg: Hotkey foreground colour for current item
* current: Index of currently highlighted item (ToDo: This should be passed by reference (how?)!)
* align: If width is greater than the text length, a zero indicates the text
* should be left-aligned, a 1 indicates it should be right-aligned, and
* a 2 indicates it should be centered.
* Return Values:
* null for error, retval from the selected item for non-errors
*/function lightbar_func(xpos, ypos, items, direction, fg, bg, hfg, hbg, kfg, khfg, current, align)
{
var attr=bg<<4|fg;
var cattr=hbg<<4|hfg;
var kattr=bg<<4|kfg;
var kcattr=hbg<<4|khfg;
var ret=undefined;
if(!(user.settings & USER_ANSI)) {
alert("ANSI not supported for lightbar!");
return(null);
}
if(!(user.settings & USER_COLOR)) {
alert("Colour not supported for lightbar!");
return(null);
}
if(direction < 0 || direction > 1) {
alert("Unknown lightbar direction!");
return(null);
}
/* Check that a vertical lightbar fits on the screen */
if(direction==0 && (ypos+items.length-1 > console.screen_rows)) {
alert("Screen too short for lightbar!");
return(null);
}
/* Ensure current is valid */
if(current<0 || current >= items.length) {
alert("current parameter is out of range!");
return(null);
}
/* Check that a horizontal lightbar fits on the screen */
if(direction==1) {
var end=xpos;
var i;
for(i=0; i<items.length; i++) {
if(items[i].width==undefined) {
if(items[i]==undefined) {
alert("Sparse items array!");
return(null);
}
if(items[i].text==undefined) {
alert("No text for item "+i+"!");
return(null);
}
var cleaned=items[i].text;
cleaned=cleaned.replace(/\|/g,'');
end+=cleaned.length+1;
}
else {
end+=items[i].width
}
}
}
/* Main loop */
while(1) {
var i;
var j;
/* Draw items */
var curx=xpos;
var cury=ypos;
var cursx=xpos;
var cursy=ypos;
for(i=0; i<items.length; i++) {
var width; var cleaned=items[i].text;
cleaned=cleaned.replace(/\|/g,'');
width=cleaned.length;
if(items[i]==undefined) {
alert("Sparse items array!");
return(null);
}
if(items[i].text==undefined) {
alert("No text for item "+i+"!");
return(null);
}
if(items[i].width!=undefined)
width=items[i].width;
console.gotoxy(curx, cury);
if(i==current) {
cursx=curx;
cursy=cury;
}
j=0;
if(cleaned.length < width) {
if(align==1) {
if(current==i)
console.attributes=cattr;
else
console.attributes=attr;
for(;j<width-cleaned.length;j++)
console.write(' ');
}
if(align==2) {
if(current==i)
console.attributes=cattr;
else
console.attributes=attr;
for(;j<(width-cleaned.length)/2;j++)
console.write(' ');
}
}
for(; j<items[i].text.length; j++) {
if(width > -1 && j > width)
break;
if(items[i].text.substr(j,1)=='|') {
if(current==i)
console.attributes=kcattr;
else
console.attributes=kattr;
j++;
}
else {
if(current==i)
console.attributes=cattr;
else
console.attributes=attr;
}
console.write(items[i].text.substr(j,1));
}
if(current==i)
console.attributes=cattr;
else
console.attributes=attr;
while(j<width) {
console.write(" ");
j++;
}
if(direction==0)
cury++;
else {
console.attributes=attr;
console.write(" ");
curx+=width+1; }
}
console.gotoxy(cursx,cursy);
if(ret!=undefined)
return(ret);
/* Get input */
var key=console.getkey(K_UPPER);
switch(key) {
case KEY_UP:
if(direction==0) {
if(current==0)
current=items.length;
current--;
}
break;
case KEY_DOWN:
if(direction==0) {
current++;
if(current==items.length)
current=0;
}
break;
case KEY_LEFT:
if(direction==1) {
if(current==0)
current=items.length;
current--;
}
break;
case KEY_RIGHT:
if(direction==1) {
current++;
if(current==items.length)
current=0;
}
break;
case KEY_HOME:
current=0;
break;
case KEY_END:
current=items.length-1;
break;
case '\r':
case '\n':
if(items[current].retval==undefined)
return(undefined);
return(items[current].retval);
break;
default:
for(i=0; i<items.length; i++) {
if(items[i].text.indexOf('|'+key)!=-1) {
current=i;
if(items[current].retval==undefined)
return(undefined);
/* Let it go through once more to highlight */
ret=items[current].retval;
break;
}
}
break;
}
}
}