A progress bar, like the builtin backfill thing but like, for JS and stuff.

exec/load/progress-bar.js

+load('sbbsdefs.js');
+load('frame.js');
+
+var ProgressBar = function (x, y, w, pframe) {
+
+    if (x < 1 || x > console.screen_columns) throw 'Invalid x: ' + x;
+    if (y < 1 || y > console.screen_rows) throw 'Invalid y: ' + y;
+    if (typeof w == 'number' && w < 5 || w > console.screen_columns) {
+        throw 'Invalid width: ' + w;
+    }
+
+    this.bg = BG_BLUE;
+    this.fg = WHITE;
+
+    if (typeof w === 'undefined') w = console.screen_columns;
+    var frame = new Frame(x, y, w, 1, this.fg, pframe);
+    var subframe = new Frame(frame.x + 1, frame.y, frame.width - 2, 1, this.bg|this.fg, frame);
+    frame.putmsg(format('[%-' + (w - 2) + 's]', ''));
+
+    this.init = function () {
+        frame.open();
+    }
+
+    this.set_progress = function (percent) {
+        subframe.clear();
+        subframe.width = Math.floor((w - 2) * (percent * .01));
+        subframe.center(Math.round(percent) + '%');
+    }
+
+    this.cycle = function () {
+        frame.invalidate();
+        frame.cycle();
+    }
+
+    this.close = function () {
+        frame.close();
+    }
+
+}