76 lines
1.6 KiB
Vue
76 lines
1.6 KiB
Vue
<script>
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import { GlButtonGroup, GlButton } from '@gitlab/ui';
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const DEFAULT_SCALE = 1;
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const MIN_SCALE = 1;
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const ZOOM_LEVELS = 5;
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export default {
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components: {
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GlButtonGroup,
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GlButton,
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},
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props: {
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maxScale: {
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type: Number,
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required: true,
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},
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},
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data() {
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return {
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scale: DEFAULT_SCALE,
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};
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},
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computed: {
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disableReset() {
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return this.scale <= MIN_SCALE;
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},
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disableDecrease() {
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return this.scale === DEFAULT_SCALE;
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},
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disableIncrease() {
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return this.scale >= this.maxScale;
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},
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stepSize() {
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return (this.maxScale - MIN_SCALE) / ZOOM_LEVELS;
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},
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},
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methods: {
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setScale(scale) {
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if (scale < MIN_SCALE) {
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return;
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}
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this.scale = Math.round(scale * 100) / 100;
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this.$emit('scale', this.scale);
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},
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incrementScale() {
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this.setScale(Math.min(this.scale + this.stepSize, this.maxScale));
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},
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decrementScale() {
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this.setScale(Math.max(this.scale - this.stepSize, MIN_SCALE));
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},
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resetScale() {
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this.setScale(DEFAULT_SCALE);
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},
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},
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};
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</script>
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<template>
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<gl-button-group class="gl-z-index-1">
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<gl-button
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icon="dash"
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:disabled="disableDecrease"
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:aria-label="__('Decrease')"
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@click="decrementScale"
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/>
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<gl-button icon="redo" :disabled="disableReset" :aria-label="__('Reset')" @click="resetScale" />
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<gl-button
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icon="plus"
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:disabled="disableIncrease"
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:aria-label="__('Increase')"
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@click="incrementScale"
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/>
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</gl-button-group>
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</template>
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