mirror of
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758 lines
22 KiB
HTML
758 lines
22 KiB
HTML
<!--
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@license
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Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
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This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
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The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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Code distributed by Google as part of the polymer project is also
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subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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-->
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<link rel="import" href="../polymer/polymer.html">
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<link rel="import" href="../iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
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<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
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<link rel="import" href="../iron-form-element-behavior/iron-form-element-behavior.html">
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<link rel="import" href="../iron-range-behavior/iron-range-behavior.html">
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<link rel="import" href="../paper-behaviors/paper-inky-focus-behavior.html">
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<link rel="import" href="../paper-input/paper-input.html">
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<link rel="import" href="../paper-progress/paper-progress.html">
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<link rel="import" href="../paper-styles/color.html">
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<!--
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Material design: [Sliders](https://www.google.com/design/spec/components/sliders.html)
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`paper-slider` allows user to select a value from a range of values by
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moving the slider thumb. The interactive nature of the slider makes it a
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great choice for settings that reflect intensity levels, such as volume,
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brightness, or color saturation.
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Example:
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<paper-slider></paper-slider>
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Use `min` and `max` to specify the slider range. Default is 0 to 100.
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Example:
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<paper-slider min="10" max="200" value="110"></paper-slider>
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### Styling
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The following custom properties and mixins are available for styling:
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Custom property | Description | Default
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----------------|-------------|----------
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`--paper-slider-bar-color` | The background color of the slider | `transparent`
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`--paper-slider-active-color` | The progress bar color | `--google-blue-700`
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`--paper-slider-secondary-color` | The secondary progress bar color | `--google-blue-300`
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`--paper-slider-knob-color` | The knob color | `--google-blue-700`
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`--paper-slider-disabled-knob-color` | The disabled knob color | `--paper-grey-400`
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`--paper-slider-pin-color` | The pin color | `--google-blue-700`
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`--paper-slider-font-color` | The pin's text color | `#fff`
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`--paper-slider-disabled-active-color` | The disabled progress bar color | `--paper-grey-400`
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`--paper-slider-disabled-secondary-color` | The disabled secondary progress bar color | `--paper-grey-400`
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`--paper-slider-knob-start-color` | The fill color of the knob at the far left | `transparent`
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`--paper-slider-knob-start-border-color` | The border color of the knob at the far left | `--paper-grey-400`
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`--paper-slider-pin-start-color` | The color of the pin at the far left | `--paper-grey-400`
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`--paper-slider-height` | Height of the progress bar | `2px`
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`--paper-slider-input` | Mixin applied to the input in editable mode | `{}`
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@group Paper Elements
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@element paper-slider
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@demo demo/index.html
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@hero hero.svg
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-->
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<dom-module id="paper-slider">
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<template strip-whitespace>
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<style>
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:host {
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@apply(--layout);
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@apply(--layout-justified);
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@apply(--layout-center);
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width: 200px;
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cursor: default;
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-webkit-user-select: none;
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-moz-user-select: none;
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-ms-user-select: none;
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user-select: none;
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-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
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--paper-progress-active-color: var(--paper-slider-active-color, --google-blue-700);
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--paper-progress-secondary-color: var(--paper-slider-secondary-color, --google-blue-300);
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--paper-progress-disabled-active-color: var(--paper-slider-disabled-active-color, --paper-grey-400);
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--paper-progress-disabled-secondary-color: var(--paper-slider-disabled-secondary-color, --paper-grey-400);
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}
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/* focus shows the ripple */
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:host(:focus) {
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outline: none;
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}
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#sliderContainer {
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position: relative;
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width: 100%;
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height: calc(30px + var(--paper-slider-height, 2px));
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margin-left: calc(15px + var(--paper-slider-height, 2px)/2);
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margin-right: calc(15px + var(--paper-slider-height, 2px)/2);
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}
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#sliderContainer:focus {
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outline: 0;
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}
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#sliderContainer.editable {
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margin-top: 12px;
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margin-bottom: 12px;
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}
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.bar-container {
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position: absolute;
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top: 0;
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bottom: 0;
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left: 0;
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right: 0;
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overflow: hidden;
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}
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.ring > .bar-container {
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left: calc(5px + var(--paper-slider-height, 2px)/2);
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transition: left 0.18s ease;
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}
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.ring.expand.dragging > .bar-container {
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transition: none;
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}
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.ring.expand:not(.pin) > .bar-container {
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left: calc(8px + var(--paper-slider-height, 2px)/2);
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}
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#sliderBar {
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padding: 15px 0;
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width: 100%;
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background-color: var(--paper-slider-bar-color, transparent);
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--paper-progress-container-color: var(--paper-grey-400);
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--paper-progress-height: var(--paper-slider-height, 2px);
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}
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.slider-markers {
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position: absolute;
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top: calc(14px + var(--paper-slider-height,2px)/2);
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height: var(--paper-slider-height, 2px);
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left: 0;
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right: -1px;
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box-sizing: border-box;
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pointer-events: none;
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@apply(--layout-horizontal);
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}
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.slider-marker {
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@apply(--layout-flex);
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}
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.slider-markers::after,
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.slider-marker::after {
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content: "";
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display: block;
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margin-left: -1px;
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width: 2px;
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height: 2px;
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border-radius: 50%;
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background-color: black;
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}
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#sliderKnob {
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position: absolute;
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left: 0;
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top: 0;
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margin-left: calc(-15px - var(--paper-slider-height, 2px)/2);
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width: calc(30px + var(--paper-slider-height, 2px));
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height: calc(30px + var(--paper-slider-height, 2px));
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}
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.transiting > #sliderKnob {
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transition: left 0.08s ease;
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}
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#sliderKnob:focus {
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outline: none;
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}
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#sliderKnob.dragging {
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transition: none;
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}
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.snaps > #sliderKnob.dragging {
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transition: -webkit-transform 0.08s ease;
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transition: transform 0.08s ease;
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}
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#sliderKnobInner {
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margin: 10px;
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width: calc(100% - 20px);
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height: calc(100% - 20px);
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background-color: var(--paper-slider-knob-color, --google-blue-700);
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border: 2px solid var(--paper-slider-knob-color, --google-blue-700);
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border-radius: 50%;
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-moz-box-sizing: border-box;
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box-sizing: border-box;
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transition-property: -webkit-transform, background-color, border;
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transition-property: transform, background-color, border;
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transition-duration: 0.18s;
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transition-timing-function: ease;
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}
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.expand:not(.pin) > #sliderKnob > #sliderKnobInner {
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-webkit-transform: scale(1.5);
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transform: scale(1.5);
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}
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.ring > #sliderKnob > #sliderKnobInner {
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background-color: var(--paper-slider-knob-start-color, transparent);
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border: 2px solid var(--paper-slider-knob-start-border-color, --paper-grey-400);
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}
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#sliderKnobInner::before {
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background-color: var(--paper-slider-pin-color, --google-blue-700);
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}
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.pin > #sliderKnob > #sliderKnobInner::before {
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content: "";
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position: absolute;
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top: 0;
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left: 50%;
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margin-left: -13px;
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width: 26px;
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height: 26px;
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border-radius: 50% 50% 50% 0;
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-webkit-transform: rotate(-45deg) scale(0) translate(0);
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transform: rotate(-45deg) scale(0) translate(0);
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}
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#sliderKnobInner::before,
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#sliderKnobInner::after {
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transition: -webkit-transform .18s ease, background-color .18s ease;
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transition: transform .18s ease, background-color .18s ease;
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}
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.pin.ring > #sliderKnob > #sliderKnobInner::before {
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background-color: var(--paper-slider-pin-start-color, --paper-grey-400);
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}
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.pin.expand > #sliderKnob > #sliderKnobInner::before {
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-webkit-transform: rotate(-45deg) scale(1) translate(17px, -17px);
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transform: rotate(-45deg) scale(1) translate(17px, -17px);
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}
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.pin > #sliderKnob > #sliderKnobInner::after {
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content: attr(value);
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position: absolute;
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top: 0;
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left: 50%;
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margin-left: -16px;
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width: 32px;
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height: 26px;
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text-align: center;
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color: var(--paper-slider-font-color, #fff);
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font-size: 10px;
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-webkit-transform: scale(0) translate(0);
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transform: scale(0) translate(0);
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}
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.pin.expand > #sliderKnob > #sliderKnobInner::after {
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-webkit-transform: scale(1) translate(0, -17px);
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transform: scale(1) translate(0, -17px);
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}
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/* paper-input */
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.slider-input {
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width: 50px;
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overflow: hidden;
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--paper-input-container-input: {
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text-align: center;
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};
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@apply(--paper-slider-input);
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}
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/* disabled state */
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#sliderContainer.disabled {
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pointer-events: none;
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}
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.disabled > #sliderKnob > #sliderKnobInner {
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background-color: var(--paper-slider-disabled-knob-color, --paper-grey-400);
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border: 2px solid var(--paper-slider-disabled-knob-color, --paper-grey-400);
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-webkit-transform: scale3d(0.75, 0.75, 1);
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transform: scale3d(0.75, 0.75, 1);
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}
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.disabled.ring > #sliderKnob > #sliderKnobInner {
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background-color: var(--paper-slider-knob-start-color, transparent);
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border: 2px solid var(--paper-slider-knob-start-border-color, --paper-grey-400);
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}
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paper-ripple {
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color: var(--paper-slider-knob-color, --google-blue-700);
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}
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</style>
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<div id="sliderContainer"
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class$="[[_getClassNames(disabled, pin, snaps, immediateValue, min, expand, dragging, transiting, editable)]]">
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<div class="bar-container">
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<paper-progress
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disabled$="[[disabled]]"
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id="sliderBar"
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aria-hidden="true"
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min="[[min]]"
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max="[[max]]"
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step="[[step]]"
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value="[[immediateValue]]"
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secondary-progress="[[secondaryProgress]]"
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on-down="_bardown"
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on-up="_resetKnob"
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on-track="_onTrack">
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</paper-progress>
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</div>
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<template is="dom-if" if="[[snaps]]">
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<div class="slider-markers">
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<template is="dom-repeat" items="[[markers]]">
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<div class="slider-marker"></div>
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</template>
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</div>
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</template>
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<div id="sliderKnob"
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on-down="_knobdown"
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on-up="_resetKnob"
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on-track="_onTrack"
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on-transitionend="_knobTransitionEnd">
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<div id="sliderKnobInner" value$="[[pinValue]]"></div>
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</div>
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</div>
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<template is="dom-if" if="[[editable]]">
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<paper-input
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id="input"
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type="number"
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step="[[step]]"
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min="[[min]]"
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max="[[max]]"
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class="slider-input"
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disabled$="[[disabled]]"
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value="[[immediateValue]]"
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on-change="_changeValue"
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on-keydown="_inputKeyDown"
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no-label-float>
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</paper-input>
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</template>
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</template>
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<script>
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Polymer({
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is: 'paper-slider',
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behaviors: [
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Polymer.IronA11yKeysBehavior,
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Polymer.IronFormElementBehavior,
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Polymer.PaperInkyFocusBehavior,
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Polymer.IronRangeBehavior
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],
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properties: {
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/**
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* If true, the slider thumb snaps to tick marks evenly spaced based
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* on the `step` property value.
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*/
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snaps: {
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type: Boolean,
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value: false,
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notify: true
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},
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/**
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* If true, a pin with numeric value label is shown when the slider thumb
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* is pressed. Use for settings for which users need to know the exact
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* value of the setting.
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*/
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pin: {
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type: Boolean,
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value: false,
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notify: true
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},
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/**
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* The number that represents the current secondary progress.
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*/
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secondaryProgress: {
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type: Number,
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value: 0,
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notify: true,
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observer: '_secondaryProgressChanged'
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},
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/**
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* If true, an input is shown and user can use it to set the slider value.
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*/
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editable: {
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type: Boolean,
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value: false
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},
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/**
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* The immediate value of the slider. This value is updated while the user
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* is dragging the slider.
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*/
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immediateValue: {
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type: Number,
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value: 0,
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readOnly: true,
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notify: true
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},
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/**
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* The maximum number of markers
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*/
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maxMarkers: {
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type: Number,
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value: 0,
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notify: true,
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observer: '_maxMarkersChanged'
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},
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/**
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* If true, the knob is expanded
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*/
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expand: {
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type: Boolean,
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value: false,
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readOnly: true
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},
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/**
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* True when the user is dragging the slider.
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*/
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dragging: {
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type: Boolean,
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value: false,
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readOnly: true
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},
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transiting: {
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type: Boolean,
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value: false,
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readOnly: true
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},
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markers: {
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type: Array,
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readOnly: true,
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value: []
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},
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},
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observers: [
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'_updateKnob(value, min, max, snaps, step)',
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'_valueChanged(value)',
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'_immediateValueChanged(immediateValue)'
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],
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hostAttributes: {
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role: 'slider',
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tabindex: 0
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},
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keyBindings: {
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'left down pagedown home': '_decrementKey',
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'right up pageup end': '_incrementKey'
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},
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ready: function() {
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// issue polymer/polymer#1305
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this.async(function() {
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this._updateKnob(this.value);
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}, 1);
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},
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/**
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* Increases value by `step` but not above `max`.
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* @method increment
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*/
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increment: function() {
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this.value = this._clampValue(this.value + this.step);
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},
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/**
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* Decreases value by `step` but not below `min`.
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* @method decrement
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*/
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decrement: function() {
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this.value = this._clampValue(this.value - this.step);
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},
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_updateKnob: function(value, min, max, snaps, step) {
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this.setAttribute('aria-valuemin', min);
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this.setAttribute('aria-valuemax', max);
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this.setAttribute('aria-valuenow', value);
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this._positionKnob(this._calcRatio(value));
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},
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_valueChanged: function() {
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this.fire('value-change');
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},
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_immediateValueChanged: function() {
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if (this.dragging) {
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this.fire('immediate-value-change');
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} else {
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this.value = this.immediateValue;
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}
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},
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_secondaryProgressChanged: function() {
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this.secondaryProgress = this._clampValue(this.secondaryProgress);
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},
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_expandKnob: function() {
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this._setExpand(true);
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},
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_resetKnob: function() {
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this.cancelDebouncer('expandKnob');
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this._setExpand(false);
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},
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_positionKnob: function(ratio) {
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this._setImmediateValue(this._calcStep(this._calcKnobPosition(ratio)));
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this._setPinValue(this.immediateValue);
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this._setRatio(this._calcRatio(this.immediateValue));
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this.$.sliderKnob.style.left = (this.ratio * 100) + '%';
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if (this.dragging) {
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this._knobstartx = this.ratio * this._w;
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this.translate3d(0, 0, 0, this.$.sliderKnob);
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}
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},
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_calcKnobPosition: function(ratio) {
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return (this.max - this.min) * ratio + this.min;
|
|
},
|
|
|
|
_onTrack: function(event) {
|
|
event.stopPropagation();
|
|
switch (event.detail.state) {
|
|
case 'start':
|
|
this._trackStart(event);
|
|
break;
|
|
case 'track':
|
|
this._trackX(event);
|
|
break;
|
|
case 'end':
|
|
this._trackEnd();
|
|
break;
|
|
}
|
|
},
|
|
|
|
_trackStart: function(event) {
|
|
this._w = this.$.sliderBar.offsetWidth;
|
|
this._x = this.ratio * this._w;
|
|
this._startx = this._x;
|
|
this._knobstartx = this._startx;
|
|
this._minx = - this._startx;
|
|
this._maxx = this._w - this._startx;
|
|
this.$.sliderKnob.classList.add('dragging');
|
|
this._setDragging(true);
|
|
},
|
|
|
|
_trackX: function(e) {
|
|
if (!this.dragging) {
|
|
this._trackStart(e);
|
|
}
|
|
|
|
var dx = Math.min(this._maxx, Math.max(this._minx, e.detail.dx));
|
|
this._x = this._startx + dx;
|
|
|
|
var immediateValue = this._calcStep(this._calcKnobPosition(this._x / this._w));
|
|
this._setImmediateValue(immediateValue);
|
|
|
|
// update knob's position
|
|
var translateX = ((this._calcRatio(this.immediateValue) * this._w) - this._knobstartx);
|
|
this.translate3d(translateX + 'px', 0, 0, this.$.sliderKnob);
|
|
this._setPinValue(immediateValue);
|
|
},
|
|
|
|
_trackEnd: function() {
|
|
var s = this.$.sliderKnob.style;
|
|
|
|
this.$.sliderKnob.classList.remove('dragging');
|
|
this._setDragging(false);
|
|
this._resetKnob();
|
|
this.value = this.immediateValue;
|
|
|
|
s.transform = s.webkitTransform = '';
|
|
|
|
this.fire('change');
|
|
},
|
|
_setPinValue: function (value) {
|
|
this.pinValue = value;
|
|
},
|
|
|
|
_knobdown: function(event) {
|
|
this._expandKnob();
|
|
|
|
// cancel selection
|
|
event.preventDefault();
|
|
|
|
// set the focus manually because we will called prevent default
|
|
this.focus();
|
|
},
|
|
|
|
_bardown: function(event) {
|
|
this._w = this.$.sliderBar.offsetWidth;
|
|
var rect = this.$.sliderBar.getBoundingClientRect();
|
|
var ratio = (event.detail.x - rect.left) / this._w;
|
|
var prevRatio = this.ratio;
|
|
|
|
this._setTransiting(true);
|
|
|
|
this._positionKnob(ratio);
|
|
|
|
this.debounce('expandKnob', this._expandKnob, 60);
|
|
|
|
// if the ratio doesn't change, sliderKnob's animation won't start
|
|
// and `_knobTransitionEnd` won't be called
|
|
// Therefore, we need to manually update the `transiting` state
|
|
|
|
if (prevRatio === this.ratio) {
|
|
this._setTransiting(false);
|
|
}
|
|
|
|
this.async(function() {
|
|
this.fire('change');
|
|
});
|
|
|
|
// cancel selection
|
|
event.preventDefault();
|
|
},
|
|
|
|
_knobTransitionEnd: function(event) {
|
|
if (event.target === this.$.sliderKnob) {
|
|
this._setTransiting(false);
|
|
}
|
|
},
|
|
|
|
_maxMarkersChanged: function(maxMarkers) {
|
|
if (!this.snaps) {
|
|
this._setMarkers([]);
|
|
}
|
|
var steps = Math.floor((this.max - this.min) / this.step);
|
|
if (steps > maxMarkers) {
|
|
steps = maxMarkers;
|
|
}
|
|
this._setMarkers(new Array(steps));
|
|
},
|
|
|
|
_mergeClasses: function(classes) {
|
|
return Object.keys(classes).filter(
|
|
function(className) {
|
|
return classes[className];
|
|
}).join(' ');
|
|
},
|
|
|
|
_getClassNames: function() {
|
|
return this._mergeClasses({
|
|
disabled: this.disabled,
|
|
pin: this.pin,
|
|
snaps: this.snaps,
|
|
ring: this.immediateValue <= this.min,
|
|
expand: this.expand,
|
|
dragging: this.dragging,
|
|
transiting: this.transiting,
|
|
editable: this.editable
|
|
});
|
|
},
|
|
|
|
_incrementKey: function(event) {
|
|
if (!this.disabled) {
|
|
if (event.detail.key === 'end') {
|
|
this.value = this.max;
|
|
} else {
|
|
this.increment();
|
|
}
|
|
this.fire('change');
|
|
}
|
|
},
|
|
|
|
_decrementKey: function(event) {
|
|
if (!this.disabled) {
|
|
if (event.detail.key === 'home') {
|
|
this.value = this.min;
|
|
} else {
|
|
this.decrement();
|
|
}
|
|
this.fire('change');
|
|
}
|
|
},
|
|
|
|
_changeValue: function(event) {
|
|
this.value = event.target.value;
|
|
this.fire('change');
|
|
},
|
|
|
|
_inputKeyDown: function(event) {
|
|
event.stopPropagation();
|
|
},
|
|
|
|
// create the element ripple inside the `sliderKnob`
|
|
_createRipple: function() {
|
|
this._rippleContainer = this.$.sliderKnob;
|
|
return Polymer.PaperInkyFocusBehaviorImpl._createRipple.call(this);
|
|
},
|
|
|
|
// Hide the ripple when user is not interacting with keyboard.
|
|
// This behavior is different from other ripple-y controls, but is
|
|
// according to spec: https://www.google.com/design/spec/components/sliders.html
|
|
_focusedChanged: function(receivedFocusFromKeyboard) {
|
|
if (receivedFocusFromKeyboard) {
|
|
this.ensureRipple();
|
|
}
|
|
if (this.hasRipple()) {
|
|
// note, ripple must be un-hidden prior to setting `holdDown`
|
|
if (receivedFocusFromKeyboard) {
|
|
this._ripple.removeAttribute('hidden');
|
|
} else {
|
|
this._ripple.setAttribute('hidden', '');
|
|
}
|
|
this._ripple.holdDown = receivedFocusFromKeyboard;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Fired when the slider's value changes.
|
|
*
|
|
* @event value-change
|
|
*/
|
|
|
|
/**
|
|
* Fired when the slider's immediateValue changes.
|
|
*
|
|
* @event immediate-value-change
|
|
*/
|
|
|
|
/**
|
|
* Fired when the slider's value changes due to user interaction.
|
|
*
|
|
* Changes to the slider's value due to changes in an underlying
|
|
* bound variable will not trigger this event.
|
|
*
|
|
* @event change
|
|
*/
|
|
</script>
|
|
</dom-module>
|