score-element/score-element.html at master · Protoss78/score-element · GitHub

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<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../paper-button-group/paper-button-group.html">
<link rel="import" href="../paper-button/paper-button.html">
<!--
  A web component that lets the user select a numeric value from a defined range.
  Every selectable value will be displayed as paper-button.

  ### Example:
    <score-element selected="{{select1}}"></score-element>
    <score-element start="0.5" end="2.0" step="0.1" decimals="1" selected="{{select2}}"></score-element>
    <score-element class="green" start="0.5" end="2.0" step="0.1" decimals="1" selected="{{select4}}"
                                   ltr></score-element>

  ### Styling:
    --button-score-color:         Defines the background color of the button
    --text-score-color:           Defines the text color of the button
    --hover-score-color:          Defines the background color of the button in hover state
    --hover-text-score-color:     Defines the text color of the button in hover state
    --selected-score-color:       Defines the background color of the button in selected state
    --selected--text-score-color: Defines the text color of the button in hover state


@element score-element
@demo demo/index.html
-->
<dom-module id="score-element">
    <template>
        <style>
            paper-button-group {
                @apply(--layout-horizontal);
                @apply(--layout-center-center);
                @apply(--layout-wrap);
            }

            paper-button {
                margin: 0.2em;
                min-width: 3em;
                background: var(--button-score-color);
                color: var(--text-score-color);
                --paper-button-checked-color: var(--checked-score-color);
                --paper-button-checked-ink-color: var(--checked-score-color);
                --paper-button-unchecked-color: var(--unchecked-score-color);
                --paper-button-unchecked-ink-color: var(--unchecked-score-color);
            }

            @media (max-width: 800px) {
                paper-button {
                    min-width: 1em;
                    margin-left: 0em;
                    margin-right: 0em;
                    margin-top: 0em;
                    margin-bottom: 0.5em;
                    font-size: 1em;
                    padding: 0.5em;
                }
            }

            paper-button:hover {
                background: var(--hover-score-color);
                color: var(--hover-text-score-color);
            }

            paper-button {
                transition: background-color 0.3s;
            }

            paper-button[active] {
                background-color: var(--selected-score-color);
                color: var(--selected--text-score-color);
            }
        </style>
        <paper-button-group selected="{{selected}}" attr-for-selected="name" class="layout flex wrap">
            <template is="dom-repeat" items="[[_valueArray]]">
                <paper-button raised name="[[item]]" on-tap="onButton">[[item]]</paper-button>
            </template>
        </paper-button-group>
    </template>
</dom-module>
<script>
    Polymer({
        is: 'score-element',
        properties: {
            /**
             * The start value of the score range.
             *
             * @attribute start
             * @type Number
             * @default 0
             */
            start: {
                type: Number,
                value: 0
            },
            /**
             * True if the highest score value should be displayed on the left side.
             *
             * @attribute ltr
             * @type Boolean
             * @default false
             */
            ltr: {
                type: Boolean,
                value: false
            },
            /**
             * The end value of the score range.
             *
             * @attribute end
             * @type Number
             * @default 10
             */
            end: {
                type: Number,
                value: 10
            },
            /**
             * The step size for the score range.
             *
             * @attribute step
             * @type Number
             * @default 1
             */
            step: {
                type: Number,
                value: 1
            },
            /**
             * The number of decimal positions to display.
             *
             * @attribute decimals
             * @type Number
             * @default 0
             */
            decimals: {
                type: Number,
                value: 0
            },
            /**
             * The currently selected score.
             *
             * @attribute selected
             * @type Number
             * @notify true
             */
            selected: {
                type: Number,
                notify: true
            },
            /**
             * The currently calculated value array.
             *
             * @attribute _valueArray
             * @type Array
             */
            _valueArray: {
                type: Array,
                computed: '_calculateArray(start, end, step, decimals)'
            }
        },
        _calculateArray: function (start, end, step, decimals) {
            var newArray = [];
            var min = Number(start);
            var max = Number(end);
            var multiplier = Math.pow(10, decimals);
            var stepValue = Number(step);
            for (var i = min; Math.floor(i * multiplier) <= Math.floor(max * multiplier); i = i + stepValue) {
                newArray.push(i.toFixed(decimals));
            }
            if (this.ltr) {
                return newArray.reverse();
            } else {
                return newArray;
            }
        }
    });
</script>