535 lines
18 KiB
JavaScript
535 lines
18 KiB
JavaScript
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/*
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* This file is part of Toolkit.
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*
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* Toolkit is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* Toolkit is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General
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* Public License along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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"use strict";
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(function(w, TK){
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function vert(O) {
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return O.layout === "left" || O.layout === "right";
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}
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function fill_interval(ctx, w, h, a, is_vertical) {
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var i;
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if (is_vertical) {
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for (i = 0; i < a.length; i+= 2) {
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ctx.fillRect(0, h - a[i+1], w, a[i+1]-a[i]);
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}
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} else {
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for (i = 0; i < a.length; i+= 2) {
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ctx.fillRect(a[i], 0, a[i+1]-a[i], h);
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}
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}
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}
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function clear_interval(ctx, w, h, a, is_vertical) {
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var i;
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if (is_vertical) {
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for (i = 0; i < a.length; i+= 2) {
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ctx.clearRect(0, h - a[i+1], w, a[i+1]-a[i]);
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}
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} else {
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for (i = 0; i < a.length; i+= 2) {
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ctx.clearRect(a[i], 0, a[i+1]-a[i], h);
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}
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}
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}
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function draw_full(ctx, w, h, a, is_vertical) {
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ctx.fillRect(0, 0, w, h);
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clear_interval(ctx, w, h, a, is_vertical);
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}
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function make_interval(a) {
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var i, tmp, again, j;
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do {
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again = false;
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for (i = 0; i < a.length-2; i+=2) {
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if (a[i] > a[i+2]) {
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tmp = a[i];
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a[i] = a[i+2];
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a[i+2] = tmp;
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tmp = a[i+1];
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a[i+1] = a[i+3];
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a[i+3] = tmp;
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again = true;
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}
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}
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} while (again);
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for (i = 0; i < a.length-2; i+= 2) {
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if (a[i+1] > a[i+2]) {
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if (a[i+3] > a[i+1]) {
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a[i+1] = a[i+3];
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}
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for (j = i+3; j < a.length; j++) a[j-1] = a[j];
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a.length = j-2;
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i -=2;
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continue;
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}
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}
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}
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function cmp_intervals(a, b) {
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var ret = 0;
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var i;
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for (i = 0; i < a.length; i+=2) {
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if (a[i] === b[i]) {
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if (a[i+1] === b[i+1]) continue;
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ret |= (a[i+1] < b[i+1]) ? 1 : 2;
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} else if (a[i+1] === b[i+1]) {
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ret |= (a[i] > b[i]) ? 1 : 2;
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} else return 4;
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}
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return ret;
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}
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function subtract_intervals(a, b) {
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var i;
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var ret = [];
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for (i = 0; i < a.length; i+=2) {
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if (a[i] === b[i]) {
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if (a[i+1] <= b[i+1]) continue;
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ret.push(b[i+1], a[i+1]);
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} else {
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if (a[i] > b[i]) continue;
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ret.push(a[i], b[i]);
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}
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}
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return ret;
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}
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TK.MeterBase = TK.class({
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/**
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* TK.MeterBase is a base class to build different meters such as {@link TK.LevelMeter} from.
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* TK.MeterBase uses {@link TK.Gradient} and contains a {@link TK.Scale} widget.
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* TK.MeterBase inherits all options from {@link TK.Scale}.
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*
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* Note that the two options <code>format_labels</code> and
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* <code>scale_base</code> have different names here.
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*
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* Note that level meters with high update frequencies can be very demanding when it comes
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* to rendering performance. These performance requirements can be reduced by increasing the
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* segment size using the <code>segment</code> option. Using a segment, the different level
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* meter positions are reduced. This widget will take advantage of that by avoiding rendering those
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* changes to the meter level, which fall into the same segment.
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*
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* @class TK.MeterBase
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*
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* @extends TK.Widget
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*
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* @param {Object} [options={ }] - An object containing initial options.
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*
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* @property {String} [options.layout="left"] - A string describing the layout of the meter.
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* Possible values are <code>"left"</code>, <code>"right"</code>, <code>"top"</code> and
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* <code>"bottom"</code>. <code>"left"</code> and <code>"right"</code> are vertical
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* layouts, where the meter is on the left or right of the scale, respectively. Similarly,
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* <code>"top"</code> and <code>"bottom"</code> are horizontal layouts in which the meter
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* is at the top or the bottom, respectively.
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* @property {Integer} [options.segment=1] - Segment size. Pixel positions of the meter level are
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* rounded to multiples of this size. This can be used to give the level meter a LED effect and to
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* reduce processor load.
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* @property {Number} [options.value=0] - Level value.
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* @property {Number} [options.base=false] - The base value of the meter. If set to <code>false</code>,
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* the base will coincide with the minimum value <code>options.min</code>. The meter level is drawn
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* starting from the base to the value.
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* @property {Number} [options.label=0] - Value to be displayed on the label.
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* @property {Function} [options.format_label=TK.FORMAT("%.2f")] - Function for formatting the
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* label.
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* @property {Boolean} [options.show_label=false] - If set to <code>true</code> a label is displayed.
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* @property {Number} [options.title=false] - The title of the TK.MeterBase. Set to `false` to hide it.
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* @property {Boolean} [options.show_scale=true] - Set to <code>false</code> to hide the scale.
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* @property {Number|Boolean} [options.scale_base=false] - Base of the meter scale, see {@link TK.Scale} for more information.
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* @property {Boolean} [options.show_labels=true] - If <code>true</code>, display labels on the
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* scale.
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* @property {Function} [options.format_labels=TK.FORMAT("%.2f")] - Function for formatting the
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* scale labels. This is passed to TK.Scale as option <code>labels</code>.
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*
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*/
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_class: "MeterBase",
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Extends: TK.Widget,
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Implements: [TK.Gradient],
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_options: Object.assign(Object.create(TK.Widget.prototype._options),
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TK.Gradient.prototype._options, TK.Scale.prototype._options, {
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layout: "string",
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segment: "number",
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value: "number",
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base: "number|boolean",
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min: "number",
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max: "number",
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label: "number",
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title: "string|boolean",
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show_labels: "boolean",
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format_label: "function",
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scale_base: "number|boolean",
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format_labels: "function",
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background: "string|boolean",
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gradient: "object|boolean"
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}),
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options: {
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layout: "left",
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segment: 1,
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value: 0,
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base: false,
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label: 0,
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title: false,
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show_labels: true,
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format_label: TK.FORMAT("%.2f"),
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levels: [1, 5, 10], // array of steps where to draw labels
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scale_base: false,
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format_labels: TK.FORMAT("%.2f"),
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background: false,
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gradient: false
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},
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static_events: {
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set_label: function(value) {
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/**
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* Is fired when the label changed.
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* The argument is the actual label value.
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*
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* @event TK.MeterBase#labelchanged
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*
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* @param {string} label - The label of the {@link TK.MeterBase}.
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*/
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this.fire_event("labelchanged", value);
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},
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set_title: function(value) {
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/**
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* Is fired when the title changed.
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* The argument is the actual title.
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*
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* @event TK.MeterBase#titlechanged
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*
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* @param {string} title - The title of the {@link TK.MeterBase}.
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*/
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this.fire_event("titlechanged", value);
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},
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set_segment: function(value) {
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// what is this supposed to do?
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// -> probably invalidate the value to force a redraw
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this.set("value", this.options.value);
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},
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set_value: function(value) {
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/**
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* Is fired when the value changed.
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* The argument is the actual value.
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*
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* @event TK.MeterBase#valuechanged
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*
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* @param {number} value - The value of the {@link TK.MeterBase}.
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*/
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this.fire_event("valuechanged", value);
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},
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set_base: function(value) {
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if (value === false) {
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var O = this.options;
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O.base = value = O.min;
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}
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/**
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* Is fired when the base value changed.
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* The argument is the actual base value.
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*
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* @event TK.MeterBase#basechanged
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*
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* @param {number} base - The value of the base.
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*/
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this.fire_event("basechanged", value);
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},
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set_layout: function () {
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var O = this.options;
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this.set("value", O.value);
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this.set("min", O.min);
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this.trigger_resize();
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},
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rangedchanged: function() {
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var gradient = this.options.gradient;
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if (gradient) {
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this.set("gradient", gradient);
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}
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},
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},
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initialize: function (options) {
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var E;
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TK.Widget.prototype.initialize.call(this, options);
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var O = this.options;
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/**
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* @member {HTMLDivElement} TK.MeterBase#element - The main DIV container.
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* Has class <code>toolkit-meter-base</code>.
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*/
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if (!(E = this.element)) this.element = E = TK.element("div");
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TK.add_class(E, "toolkit-meter-base");
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this.widgetize(E, false, true, true);
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this._bar = TK.element("div", "toolkit-bar");
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/**
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* @member {HTMLCanvas} TK.MeterBase#_canvas - The canvas element drawing the mask.
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* Has class <code>toolkit-mask</code>.
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*/
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this._canvas = document.createElement("canvas");
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TK.add_class(this._canvas, "toolkit-mask");
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this._fillstyle = false;
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E.appendChild(this._bar);
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this._bar.appendChild(this._canvas);
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/**
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* @member {HTMLDivElement} TK.MeterBase#_bar - The DIV element containing the masks
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* and drawing the background. Has class <code>toolkit-bar</code>.
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*/
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this.delegate(this._bar);
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this._last_meters = [];
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this._current_meters = [];
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this.set("label", O.value);
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this.set("base", O.base);
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},
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destroy: function () {
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this._bar.remove();
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TK.Widget.prototype.destroy.call(this);
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},
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redraw: function () {
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var I = this.invalid;
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var O = this.options;
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var E = this.element;
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if (this._fillstyle === false) {
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this._canvas.style.removeProperty("background-color");
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TK.S.add(function() {
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this._fillstyle = TK.get_style(this._canvas, "background-color");
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TK.S.add(function() {
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this._canvas.getContext("2d").fillStyle = this._fillstyle;
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this._canvas.style.setProperty("background-color", "transparent", "important");
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this.trigger_draw();
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}.bind(this), 3);
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}.bind(this), 2);
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}
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if (I.reverse) {
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I.reverse = false;
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TK.toggle_class(E, "toolkit-reverse", O.reverse);
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}
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if (I.gradient || I.background) {
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I.gradient = I.background = false;
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this.draw_gradient(this._bar, O.gradient, O.background);
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}
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TK.Widget.prototype.redraw.call(this);
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if (I.layout) {
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I.layout = false;
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TK.remove_class(E, "toolkit-vertical",
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"toolkit-horizontal", "toolkit-left",
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"toolkit-right", "toolkit-top", "toolkit-bottom");
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var scale = this.scale ? this.scale.element : null;
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var bar = this._bar;
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switch (O.layout) {
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case "left":
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TK.add_class(E, "toolkit-vertical", "toolkit-left");
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if (scale) TK.insert_after(scale, bar);
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break;
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case "right":
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TK.add_class(E, "toolkit-vertical", "toolkit-right");
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if (scale) TK.insert_after(bar, scale);
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break;
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case "top":
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TK.add_class(E, "toolkit-horizontal", "toolkit-top");
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if (scale) TK.insert_after(scale, bar);
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break;
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case "bottom":
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TK.add_class(E, "toolkit-horizontal", "toolkit-bottom");
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if (scale) TK.insert_after(bar, scale);
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break;
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default:
|
||
|
|
throw("unsupported layout");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this._fillstyle === false) return;
|
||
|
|
|
||
|
|
if (I.basis && O._height > 0 && O._width > 0) {
|
||
|
|
this._canvas.setAttribute("height", Math.round(O._height));
|
||
|
|
this._canvas.setAttribute("width", Math.round(O._width));
|
||
|
|
/* FIXME: I am not sure why this is even necessary */
|
||
|
|
this._canvas.style.width = O._width + "px";
|
||
|
|
this._canvas.style.height = O._height + "px";
|
||
|
|
this._canvas.getContext("2d").fillStyle = this._fillstyle;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (I.value && O.show_label) {
|
||
|
|
this.label.set("label", O.format_label(O.value));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (I.value || I.basis || I.min || I.max) {
|
||
|
|
I.basis = I.value = I.min = I.max = false;
|
||
|
|
this.draw_meter();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
resize: function() {
|
||
|
|
var O = this.options;
|
||
|
|
TK.Widget.prototype.resize.call(this);
|
||
|
|
var w = TK.inner_width(this._bar);
|
||
|
|
var h = TK.inner_height(this._bar);
|
||
|
|
this.set("_width", w);
|
||
|
|
this.set("_height", h);
|
||
|
|
var i = vert(O) ? h : w;
|
||
|
|
this.set("basis", i);
|
||
|
|
this._last_meters.length = 0;
|
||
|
|
this._fillstyle = false;
|
||
|
|
},
|
||
|
|
|
||
|
|
calculate_meter: function(to, value, i) {
|
||
|
|
var O = this.options;
|
||
|
|
// Set the mask elements according to options.value to show a value in
|
||
|
|
// the meter bar
|
||
|
|
var base = O.base;
|
||
|
|
var segment = O.segment|0;
|
||
|
|
var reverse = !!O.reverse;
|
||
|
|
var size = O.basis|0;
|
||
|
|
|
||
|
|
/* At this point the whole meter bar is filled. We now want
|
||
|
|
* to clear the area between base and value.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* canvas coordinates are reversed */
|
||
|
|
var v1 = this.val2px(base)|0;
|
||
|
|
var v2 = this.val2px(value)|0;
|
||
|
|
|
||
|
|
if (segment !== 1) v2 = segment*(Math.round(v2/segment)|0);
|
||
|
|
|
||
|
|
if (v2 < v1) {
|
||
|
|
to[i++] = v2;
|
||
|
|
to[i++] = v1;
|
||
|
|
} else {
|
||
|
|
to[i++] = v1;
|
||
|
|
to[i++] = v2;
|
||
|
|
}
|
||
|
|
|
||
|
|
return i;
|
||
|
|
},
|
||
|
|
|
||
|
|
draw_meter: function () {
|
||
|
|
var O = this.options;
|
||
|
|
var w = Math.round(O._width);
|
||
|
|
var h = Math.round(O._height);
|
||
|
|
var i, j;
|
||
|
|
|
||
|
|
if (!(w > 0 && h > 0)) return;
|
||
|
|
|
||
|
|
var a = this._current_meters;
|
||
|
|
var tmp = this._last_meters;
|
||
|
|
|
||
|
|
var i = this.calculate_meter(a, O.value, 0);
|
||
|
|
if (i < a.length) a.length = i;
|
||
|
|
make_interval(a);
|
||
|
|
|
||
|
|
this._last_meters = a;
|
||
|
|
this._current_meters = tmp;
|
||
|
|
|
||
|
|
var diff;
|
||
|
|
|
||
|
|
if (tmp.length === a.length) {
|
||
|
|
diff = cmp_intervals(tmp, a)|0;
|
||
|
|
} else diff = 4;
|
||
|
|
|
||
|
|
if (!diff) return;
|
||
|
|
|
||
|
|
// FIXME: this is currently broken for some reason
|
||
|
|
if (diff == 1)
|
||
|
|
diff = 4;
|
||
|
|
|
||
|
|
var ctx = this._canvas.getContext("2d");
|
||
|
|
ctx.fillStyle = this._fillstyle;
|
||
|
|
var is_vertical = vert(O);
|
||
|
|
|
||
|
|
if (diff === 1) {
|
||
|
|
/* a - tmp is non-empty */
|
||
|
|
clear_interval(ctx, w, h, subtract_intervals(a, tmp), is_vertical);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (diff === 2) {
|
||
|
|
/* tmp - a is non-empty */
|
||
|
|
fill_interval(ctx, w, h, subtract_intervals(tmp, a), is_vertical);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
draw_full(ctx, w, h, a, is_vertical);
|
||
|
|
},
|
||
|
|
|
||
|
|
// HELPERS & STUFF
|
||
|
|
_val2seg: function (val) {
|
||
|
|
// rounds values to fit in the segments size
|
||
|
|
// always returns values without taking options.reverse into account
|
||
|
|
var s = +this.val2px(this.snap(val));
|
||
|
|
s -= s % +this.options.segment;
|
||
|
|
if (this.options.reverse)
|
||
|
|
s = +this.options.basis - s;
|
||
|
|
return s;
|
||
|
|
},
|
||
|
|
|
||
|
|
has_base: function() {
|
||
|
|
var O = this.options;
|
||
|
|
return O.base > O.min;
|
||
|
|
},
|
||
|
|
|
||
|
|
});
|
||
|
|
/**
|
||
|
|
* @member {TK.Scale} TK.MeterBase#scale - The {@link TK.Scale} of the meter.
|
||
|
|
*/
|
||
|
|
TK.ChildWidget(TK.MeterBase, "scale", {
|
||
|
|
create: TK.Scale,
|
||
|
|
map_options: {
|
||
|
|
format_labels: "labels",
|
||
|
|
scale_base: "base",
|
||
|
|
},
|
||
|
|
inherit_options: true,
|
||
|
|
show: true,
|
||
|
|
toggle_class: true,
|
||
|
|
static_events: {
|
||
|
|
set: function(key, value) {
|
||
|
|
var p = this.parent;
|
||
|
|
if (p)
|
||
|
|
p.fire_event("scalechanged", key, value);
|
||
|
|
},
|
||
|
|
},
|
||
|
|
});
|
||
|
|
/**
|
||
|
|
* @member {TK.Label} TK.MeterBase#title - The {@link TK.Label} displaying the title.
|
||
|
|
* Has class <code>toolkit-title</code>.
|
||
|
|
*/
|
||
|
|
TK.ChildWidget(TK.MeterBase, "title", {
|
||
|
|
create: TK.Label,
|
||
|
|
show: false,
|
||
|
|
option: "title",
|
||
|
|
default_options: { "class" : "toolkit-title" },
|
||
|
|
map_options: { "title" : "label" },
|
||
|
|
toggle_class: true,
|
||
|
|
});
|
||
|
|
/**
|
||
|
|
* @member {TK.Label} TK.MeterBase#label - The {@link TK.Label} displaying the label.
|
||
|
|
*/
|
||
|
|
TK.ChildWidget(TK.MeterBase, "label", {
|
||
|
|
create: TK.Label,
|
||
|
|
show: false,
|
||
|
|
default_options: { "class" : "toolkit-value" },
|
||
|
|
toggle_class: true,
|
||
|
|
});
|
||
|
|
})(this, this.TK);
|