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<script>
export default {
name: "tile-tree",
data(){
return {
TILE_SPACING: 5,
HEADER_SZ: 20,
}
},
props: {
tree: Object,
x: Number,
y: Number,
width: Number,
height: Number,
isRoot: Boolean,
},
computed: {
layout(){
if (!this.tree.children || this.tree.children.length == 0)
return {};
let hOffset = (this.isRoot ? 0 : this.HEADER_SZ);
let x = 0, y = hOffset, w = this.width, h = this.height - hOffset;
//return this.basicSquaresLayout(this.tree.children, 0, hOffset, this.width, this.height - hOffset);
return this.sweepToSideLayout(this.tree.children, 0, hOffset, this.width, this.height - hOffset);
}
},
methods: {
//determines layout for squares in a specified rectangle, with spacing
basicSquaresLayout(nodes, x0, y0, w, h){
//get number-of-columns with highest occupied-fraction of rectangles with aspect-ratio w/h
//account for tile-spacing?
let numTiles = nodes.length, ar = w/h;
let numCols, numRows, bestFrac = 0;
for (let nc = 1; nc <= numTiles; nc++){
let nr = Math.ceil(numTiles/nc);
let ar2 = nc/nr;
let frac = ar > ar2 ? ar2/ar : ar/ar2;
if (frac > bestFrac){
bestFrac = frac;
numCols = nc;
numRows = nr;
}
}
//compute other parameters
let tileSz = Math.min(
((w - this.TILE_SPACING) / numCols) - this.TILE_SPACING,
((h - this.TILE_SPACING) / numRows) - this.TILE_SPACING);
//determine layout
return Object.fromEntries(
nodes.map((el, idx) => [el.name, {
x: x0 + (idx % numCols)*(tileSz + this.TILE_SPACING) + this.TILE_SPACING,
y: y0 + Math.floor(idx / numCols)*(tileSz + this.TILE_SPACING) + this.TILE_SPACING,
w: tileSz,
h: tileSz
}])
);
},
basicRectsLayout(nodes, x0, y0, w, h){
//get number-of-columns with highest tileCount-proportions-alignment
let numTiles = nodes.length;
let tileCounts = nodes.map(e => e.tileCount);
let tileCountTotal = tileCounts.reduce((x, y) => x+y);
let numCols, bestScore = Number.NEGATIVE_INFINITY, rowProportions, colProportions;
for (let nc = 1; nc <= numTiles; nc++){
let nr = Math.ceil(numTiles/nc);
//create grid representing each tile's tileCount (0 for no tile)
let grid = Array(nr).fill().map(e => Array(nc).fill(0));
for (let i = 0; i < tileCounts.length; i++){
grid[Math.floor(i / nc)][i % nc] = tileCounts[i];
}
//get totals across each row/column divided by tileCountTotal
let rowProp = grid.map(e => e.reduce((x, y) => x+y) / tileCountTotal);
let colProp = [...Array(nc).keys()].map(c =>
[...Array(nr).keys()].map(r => grid[r][c]).reduce((x,y) => x+y) / tileCountTotal);
//get score
let score = 0;
for (let r = 0; r < nr; r++){
for (let c = 0; c < nc; c++){
score -= Math.abs(grid[r][c] - (rowProp[r] * colProp[c]));
}
}
if (score > bestScore){
bestScore = score;
numCols = nc;
rowProportions = rowProp;
colProportions = colProp;
}
}
//determine layout
let rowNetProps = [0];
for (let i = 0; i < rowProportions.length-1; i++){
rowNetProps.push(rowNetProps[i] + rowProportions[i]);
}
let colNetProps = [0];
for (let i = 0; i < colProportions.length-1; i++){
colNetProps.push(colNetProps[i] + colProportions[i]);
}
let retVal = Object.fromEntries(
nodes.map((el, idx) => [el.name, {
x: x0 + colNetProps[idx % numCols]*(w - this.TILE_SPACING) + this.TILE_SPACING,
y: y0 + rowNetProps[Math.floor(idx / numCols)]*(h - this.TILE_SPACING) + this.TILE_SPACING,
w: colProportions[idx % numCols]*(w - this.TILE_SPACING) - this.TILE_SPACING,
h: rowProportions[Math.floor(idx / numCols)]*(h - this.TILE_SPACING) - this.TILE_SPACING
}]));
return retVal;
},
sweepToSideLayout(nodes, x0, y0, w, h){
//separate leaf and non-leaf nodes
let leaves = [], nonLeaves = [];
nodes.forEach(e => ((e.children && e.children.length > 0) ? nonLeaves : leaves).push(e));
//determine layout
if (nonLeaves.length == 0){ //if all leaves, use squares-layout
return this.basicSquaresLayout(this.tree.children, x0, y0, w, h);
} else { //if some non-leaves, use rect-layout
let retVal = {};
if (leaves.length > 0){
let ratio = leaves.length / this.tree.tileCount;
retVal = this.basicSquaresLayout(leaves, x0, y0, w*ratio, h);
x0 += w*ratio - this.TILE_SPACING;
w -= (w*ratio - this.TILE_SPACING);
}
//return {...retVal, ...this.basicSquaresLayout(nonLeaves, x0, y0, w, h)};
return {...retVal, ...this.basicRectsLayout(nonLeaves, x0, y0, w, h)};
}
}
}
}
</script>
<template>
<div v-if="tree.children && tree.children.length > 0" class="border border-black"
:style="{position: 'absolute', left: x + 'px', top: y + 'px', width: + width + 'px', height: height + 'px'}">
<div v-if="!isRoot" :style="{height: HEADER_SZ + 'px'}" class="text-center">{{tree.name}}</div>
<tile-tree v-for="child in tree.children" :key="child.name" :tree="child"
:x="layout[child.name].x" :y="layout[child.name].y" :width="layout[child.name].w" :height="layout[child.name].h"
></tile-tree>
</div>
<img v-else
:src="'/src/assets/' + tree.name + '.jpg'" :alt="tree.name"
:style="{position: 'absolute', left: x + 'px', top: y + 'px'}" :width="width" :height="height"
class="transition-all duration-300 ease-out border-2 border-amber-900"
/>
</template>
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