openmct/src/plugins/displayLayout/components/LayoutFrame.vue

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 Open MCT, Copyright (c) 2014-2024, United States Government
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 Open MCT is licensed under the Apache License, Version 2.0 (the
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<template>
  <div
    class="l-layout__frame c-frame"
    :class="{
      'no-frame': !item.hasFrame,
      'u-inspectable': inspectable
    }"
    :style="style"
  >
    <slot name="content"></slot>
    <div
      class="c-frame__move-bar"
      :aria-label="`Move ${typeName} Frame`"
      @mousedown.left="startMove($event)"
    ></div>
  </div>
</template>

<script>
import _ from 'lodash';

import DRAWING_OBJECT_TYPES from '../DrawingObjectTypes.js';
import LayoutDrag from './../LayoutDrag.js';

export default {
  inject: ['openmct'],
  props: {
    item: {
      type: Object,
      required: true
    },
    gridSize: {
      type: Array,
      required: true,
      validator: (arr) => arr && arr.length === 2 && arr.every((el) => typeof el === 'number')
    },
    isEditing: {
      type: Boolean,
      required: true
    }
  },
  emits: ['move', 'end-move'],
  computed: {
    typeName() {
      const { type } = this.item;
      if (DRAWING_OBJECT_TYPES[type]) {
        return DRAWING_OBJECT_TYPES[type].name;
      }
      return 'Sub-object';
    },
    size() {
      let { width, height } = this.item;

      return {
        width: this.gridSize[0] * width,
        height: this.gridSize[1] * height
      };
    },
    style() {
      let { x, y, width, height } = this.item;

      return {
        left: this.gridSize[0] * x + 'px',
        top: this.gridSize[1] * y + 'px',
        width: this.gridSize[0] * width + 'px',
        height: this.gridSize[1] * height + 'px',
        minWidth: this.gridSize[0] * width + 'px',
        minHeight: this.gridSize[1] * height + 'px'
      };
    },
    inspectable() {
      return this.item.type === 'subobject-view' || this.item.type === 'telemetry-view';
    }
  },
  methods: {
    updatePosition(event) {
      let currentPosition = [event.pageX, event.pageY];
      this.initialPosition = this.initialPosition || currentPosition;
      this.delta = currentPosition.map(
        function (value, index) {
          return value - this.initialPosition[index];
        }.bind(this)
      );
    },
    startMove(event, posFactor = [1, 1], dimFactor = [0, 0]) {
      if (!this.isEditing) {
        return;
      }

      document.body.addEventListener('mousemove', this.continueMove);
      document.body.addEventListener('mouseup', this.endMove);
      this.dragPosition = {
        position: [this.item.x, this.item.y]
      };
      this.updatePosition(event);
      this.activeDrag = new LayoutDrag(this.dragPosition, posFactor, dimFactor, this.gridSize);
      event.preventDefault();
    },
    continueMove(event) {
      event.preventDefault();
      this.updatePosition(event);
      let newPosition = this.activeDrag.getAdjustedPosition(this.delta);

      if (!_.isEqual(newPosition, this.dragPosition)) {
        this.dragPosition = newPosition;
        this.$emit('move', this.toGridDelta(this.delta));
      }
    },
    endMove(event) {
      document.body.removeEventListener('mousemove', this.continueMove);
      document.body.removeEventListener('mouseup', this.endMove);
      this.continueMove(event);
      this.$emit('end-move');
      this.dragPosition = undefined;
      this.initialPosition = undefined;
      this.delta = undefined;
      event.preventDefault();
    },
    toGridDelta(pixelDelta) {
      return pixelDelta.map((v, i) => {
        return Math.round(v / this.gridSize[i]);
      });
    }
  }
};
</script>