89 lines
2.4 KiB
TypeScript
89 lines
2.4 KiB
TypeScript
import {Component, LifecycleEvent, View, Attribute} from 'angular2/angular2';
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import {isPresent, isBlank} from 'angular2/src/facade/lang';
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import {Math} from 'angular2/src/facade/math';
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@Component({
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selector: 'md-progress-linear',
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lifecycle: [LifecycleEvent.onChange],
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properties: ['value', 'bufferValue'],
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host: {
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'[attr.role]': '"progressbar"',
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'[attr.aria-valuemin]': '"0"',
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'[attr.aria-valuemax]': '"100"',
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'[attr.aria-valuenow]': 'value'
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}
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})
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@View({
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templateUrl: 'angular2_material/src/components/progress-linear/progress_linear.html',
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directives: []
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})
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export class MdProgressLinear {
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/** Value for the primary bar. */
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value_: number;
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/** Value for the secondary bar. */
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bufferValue: number;
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/** The render mode for the progress bar. */
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mode: string;
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/** CSS `transform` property applied to the primary bar. */
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primaryBarTransform: string;
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/** CSS `transform` property applied to the secondary bar. */
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secondaryBarTransform: string;
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constructor(@Attribute('md-mode') mode: string) {
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this.primaryBarTransform = '';
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this.secondaryBarTransform = '';
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this.mode = isPresent(mode) ? mode : Mode.DETERMINATE;
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}
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get value() {
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return this.value_;
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}
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set value(v) {
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if (isPresent(v)) {
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this.value_ = MdProgressLinear.clamp(v);
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}
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}
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onChange(_) {
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// If the mode does not use a value, or if there is no value, do nothing.
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if (this.mode == Mode['QUERY'] || this.mode == Mode['INDETERMINATE'] || isBlank(this.value)) {
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return;
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}
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this.primaryBarTransform = this.transformForValue(this.value);
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// The bufferValue is only used in buffer mode.
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if (this.mode == Mode['BUFFER']) {
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this.secondaryBarTransform = this.transformForValue(this.bufferValue);
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}
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}
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/** Gets the CSS `transform` property for a progress bar based on the given value (0 - 100). */
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transformForValue(value) {
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// TODO(jelbourn): test perf gain of caching these, since there are only 101 values.
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var scale = value / 100;
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var translateX = (value - 100) / 2;
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return `translateX(${translateX}%) scale(${scale}, 1)`;
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}
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/** Clamps a value to be between 0 and 100. */
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static clamp(v) {
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return Math.max(0, Math.min(100, v));
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}
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}
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/** @enum {string} Progress-linear modes. */
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var Mode = {
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'DETERMINATE': 'determinate',
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'INDETERMINATE': 'indeterminate',
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'BUFFER': 'buffer',
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'QUERY': 'query'
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};
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