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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const GObject = imports.gi.GObject;
const St = imports.gi.St;
var BarLevel = GObject.registerClass({
Properties: {
'value': GObject.ParamSpec.double(
'value', 'value', 'value',
GObject.ParamFlags.READWRITE,
0, 2, 0),
'maximum-value': GObject.ParamSpec.double(
'maximum-value', 'maximum-value', 'maximum-value',
GObject.ParamFlags.READWRITE,
1, 2, 1),
'amplify-start': GObject.ParamSpec.double(
'amplify-start', 'amplify-start', 'amplify-start',
GObject.ParamFlags.READWRITE,
1, 2, 1),
},
}, class BarLevel extends St.DrawingArea {
_init(params) {
this._maxValue = 1;
this._value = 0;
this._amplifyStart = 1;
this._barLevelWidth = 0;
this._barLevelHeight = 0;
this._amplifySeparatorWidth = 0;
this._barLevelColor = null;
this._barLevelActiveColor = null;
this._barLevelAmplifyColor = null;
let defaultParams = {
style_class: 'barlevel',
};
super._init(Object.assign(defaultParams, params));
this.connect('notify::allocation', () => {
this._barLevelWidth = this.allocation.get_width();
});
}
get value() {
return this._value;
}
set value(value) {
value = Math.max(Math.min(value, this._maxValue), 0);
if (this._value == value)
return;
this._value = value;
this.notify('value');
this.queue_repaint();
}
get maximum_value() {
return this._maxValue;
}
set maximum_value(value) {
value = Math.max(value, 1);
if (this._maxValue == value)
return;
this._maxValue = value;
this._amplifyStart = Math.min(this._amplifyStart, this._maxValue);
this.notify('maximum-value');
this.queue_repaint();
}
get amplify_start() {
return this._amplifyStart;
}
set amplify_start(value) {
if (this._amplifyStart == value)
return;
if (value > this._maxValue) {
throw new Error(`Tried to set amplify value to ${value}, ` +
`which is a number greater than the maximum allowed value ${this._maxValue}`);
}
this._amplifyStart = value;
this.notify('amplify-start');
this.queue_repaint();
}
vfunc_style_changed() {
const themeNode = this.get_theme_node();
this._barLevelHeight = themeNode.get_length('-barlevel-height');
this._amplifySeparatorWidth =
themeNode.get_length('-barlevel-amplify-separator-width');
this._barLevelColor = themeNode.get_color('-barlevel-background-color');
this._barLevelActiveColor = themeNode.get_color('-barlevel-active-background-color');
this._barLevelAmplifyColor = themeNode.get_color('-barlevel-amplify-color');
super.vfunc_style_changed();
}
vfunc_repaint() {
let cr = this.get_context();
let themeNode = this.get_theme_node();
let [width, height] = this.get_surface_size();
const rtl = this.get_direction() === St.TextDirection.RTL;
const barLevelBorderRadius = Math.min(width, this._barLevelHeight) / 2;
let fgColor = themeNode.get_foreground_color();
const TAU = Math.PI * 2;
let endX = 0;
if (this._maxValue > 0) {
let progress = this._value / this._maxValue;
if (rtl)
progress = 1 - progress;
endX = barLevelBorderRadius + (width - 2 * barLevelBorderRadius) * progress;
}
let amplifyRatio = this._amplifyStart / this._maxValue;
if (rtl)
amplifyRatio = 1 - amplifyRatio;
let amplifySeparatorX = barLevelBorderRadius + (width - 2 * barLevelBorderRadius) * amplifyRatio;
let amplifyActive = this._amplifyStart !== this._maxValue;
const amplifySeparatorWidth = amplifyActive
? this._amplifySeparatorWidth : 0;
let xcArcStart = barLevelBorderRadius;
let xcArcEnd = width - xcArcStart;
if (rtl)
[xcArcStart, xcArcEnd] = [xcArcEnd, xcArcStart];
/* background bar */
if (!rtl)
cr.arc(xcArcEnd, height / 2, barLevelBorderRadius, TAU * (3 / 4), TAU * (1 / 4));
else
cr.arcNegative(xcArcEnd, height / 2, barLevelBorderRadius, TAU * (3 / 4), TAU * (1 / 4));
cr.lineTo(endX, (height + this._barLevelHeight) / 2);
cr.lineTo(endX, (height - this._barLevelHeight) / 2);
cr.lineTo(xcArcEnd, (height - this._barLevelHeight) / 2);
Clutter.cairo_set_source_color(cr, this._barLevelColor);
cr.fillPreserve();
cr.fill();
/* normal progress bar */
let x = 0;
if (!rtl) {
x = Math.min(endX, amplifySeparatorX - amplifySeparatorWidth / 2);
cr.arc(xcArcStart, height / 2, barLevelBorderRadius, TAU * (1 / 4), TAU * (3 / 4));
} else {
x = Math.max(endX, amplifySeparatorX + amplifySeparatorWidth / 2);
cr.arcNegative(xcArcStart, height / 2, barLevelBorderRadius, TAU * (1 / 4), TAU * (3 / 4));
}
cr.lineTo(x, (height - this._barLevelHeight) / 2);
cr.lineTo(x, (height + this._barLevelHeight) / 2);
cr.lineTo(xcArcStart, (height + this._barLevelHeight) / 2);
if (this._value > 0)
Clutter.cairo_set_source_color(cr, this._barLevelActiveColor);
cr.fillPreserve();
cr.fill();
/* amplify progress barLevel */
if (!rtl)
x = Math.min(endX, amplifySeparatorX) + amplifySeparatorWidth / 2;
else
x = Math.max(endX, amplifySeparatorX) - amplifySeparatorWidth / 2;
if (this._value > this._amplifyStart) {
cr.moveTo(x, (height - this._barLevelHeight) / 2);
cr.lineTo(endX, (height - this._barLevelHeight) / 2);
cr.lineTo(endX, (height + this._barLevelHeight) / 2);
cr.lineTo(x, (height + this._barLevelHeight) / 2);
cr.lineTo(x, (height - this._barLevelHeight) / 2);
Clutter.cairo_set_source_color(cr, this._barLevelAmplifyColor);
cr.fillPreserve();
cr.fill();
}
/* end progress bar arc */
if (this._value > 0) {
if (this._value <= this._amplifyStart)
Clutter.cairo_set_source_color(cr, this._barLevelActiveColor);
else
Clutter.cairo_set_source_color(cr, this._barLevelAmplifyColor);
if (!rtl) {
cr.arc(endX, height / 2, barLevelBorderRadius, TAU * (3 / 4), TAU * (1 / 4));
cr.lineTo(Math.floor(endX), (height + this._barLevelHeight) / 2);
cr.lineTo(Math.floor(endX), (height - this._barLevelHeight) / 2);
} else {
cr.arcNegative(endX, height / 2, barLevelBorderRadius, TAU * (3 / 4), TAU * (1 / 4));
cr.lineTo(Math.ceil(endX), (height + this._barLevelHeight) / 2);
cr.lineTo(Math.ceil(endX), (height - this._barLevelHeight) / 2);
}
cr.lineTo(endX, (height - this._barLevelHeight) / 2);
cr.fillPreserve();
}
/* draw amplify separator */
if (amplifyActive) {
cr.moveTo(amplifySeparatorX - amplifySeparatorWidth / 2, (height - this._barLevelHeight) / 2);
cr.lineTo(amplifySeparatorX + amplifySeparatorWidth / 2, (height - this._barLevelHeight) / 2);
cr.lineTo(amplifySeparatorX + amplifySeparatorWidth / 2, (height + this._barLevelHeight) / 2);
cr.lineTo(amplifySeparatorX - amplifySeparatorWidth / 2, (height + this._barLevelHeight) / 2);
cr.lineTo(amplifySeparatorX - amplifySeparatorWidth / 2, (height - this._barLevelHeight) / 2);
if (this._value <= this._amplifyStart)
Clutter.cairo_set_source_color(cr, fgColor);
else
Clutter.cairo_set_source_color(cr, this._barLevelColor);
cr.fill();
}
cr.$dispose();
}
vfunc_get_preferred_height(_forWidth) {
const themeNode = this.get_theme_node();
const height = this._getPreferredHeight();
return themeNode.adjust_preferred_height(height, height);
}
vfunc_get_preferred_width(_forHeight) {
const themeNode = this.get_theme_node();
const width = this._getPreferredWidth();
return themeNode.adjust_preferred_width(width, width);
}
_getPreferredHeight() {
return this._barLevelHeight;
}
_getPreferredWidth() {
return this._amplifySeparatorWidth;
}
_getCurrentValue() {
return this._value;
}
_getAmplifyStart() {
return this._amplifyStart;
}
_getMinimumValue() {
return 0;
}
_getMaximumValue() {
return this._maxValue;
}
_setCurrentValue(_actor, value) {
this._value = value;
}
});
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