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<div ref="item" class="vue-grid-layout" :style="mergedStyle">
<slot></slot>
<grid-item class="vue-grid-placeholder"
v-show="isDragging"
:x="placeholder.x"
:y="placeholder.y"
:w="placeholder.w"
:h="placeholder.h"
:i="placeholder.i"></grid-item>
</div>
</template>
<style>
.vue-grid-layout {
position: relative;
transition: height 200ms ease;
}
</style>
<script>
import Vue from 'vue';
const elementResizeDetectorMaker = require("element-resize-detector");
import {bottom, compact, getLayoutItem, moveElement, validateLayout, cloneLayout, getAllCollisions} from '@/helpers/utils';
import {getBreakpointFromWidth, getColsFromBreakpoint, findOrGenerateResponsiveLayout} from "@/helpers/responsiveUtils";
//var eventBus = require('./eventBus');
import GridItem from './GridItem.vue'
import {addWindowEventListener, removeWindowEventListener} from "@/helpers/DOM";
export default {
name: "GridLayout",
provide() {
return {
eventBus: null,
layout: this
}
},
components: {
GridItem,
},
props: {
// If true, the container height swells and contracts to fit contents
autoSize: {
type: Boolean,
default: true
},
colNum: {
type: Number,
default: 12
},
rowHeight: {
type: Number,
default: 150
},
maxRows: {
type: Number,
default: Infinity
},
margin: {
type: Array,
default: function () {
return [10, 10];
}
},
isDraggable: {
type: Boolean,
default: true
},
isResizable: {
type: Boolean,
default: true
},
isMirrored: {
type: Boolean,
default: false
},
useCssTransforms: {
type: Boolean,
default: true
},
verticalCompact: {
type: Boolean,
default: true
},
restoreOnDrag: {
type: Boolean,
default: false
},
layout: {
type: Array,
required: true,
},
responsive: {
type: Boolean,
default: false
},
responsiveLayouts: {
type: Object,
default: function() {
return {};
}
},
breakpoints:{
type: Object,
default: function(){return{ lg: 1200, md: 996, sm: 768, xs: 480, xxs: 0 }}
},
cols:{
type: Object,
default: function(){return{ lg: 12, md: 10, sm: 6, xs: 4, xxs: 2 }},
},
preventCollision: {
type: Boolean,
default: false
},
useStyleCursor: {
type: Boolean,
default: true
}
},
data: function () {
return {
width: null,
mergedStyle: {},
lastLayoutLength: 0,
isDragging: false,
placeholder: {
x: 0,
y: 0,
w: 0,
h: 0,
i: -1
},
layouts: {}, // array to store all layouts from different breakpoints
lastBreakpoint: null, // store last active breakpoint
originalLayout: null, // store original Layout
};
},
created () {
const self = this;
// Accessible refernces of functions for removing in beforeDestroy
self.resizeEventHandler = function(eventType, i, x, y, h, w) {
self.resizeEvent(eventType, i, x, y, h, w);
};
self.dragEventHandler = function(eventType, i, x, y, h, w) {
self.dragEvent(eventType, i, x, y, h, w);
};
self._provided.eventBus = new Vue();
self.eventBus = self._provided.eventBus;
self.eventBus.$on('resizeEvent', self.resizeEventHandler);
self.eventBus.$on('dragEvent', self.dragEventHandler);
self.$emit('layout-created', self.layout);
},
beforeDestroy: function(){
//Remove listeners
this.eventBus.$off('resizeEvent', this.resizeEventHandler);
this.eventBus.$off('dragEvent', this.dragEventHandler);
this.eventBus.$destroy();
removeWindowEventListener("resize", this.onWindowResize);
if (this.erd) {
this.erd.uninstall(this.$refs.item);
}
},
beforeMount: function() {
this.$emit('layout-before-mount', this.layout);
},
mounted: function() {
this.$emit('layout-mounted', this.layout);
this.$nextTick(function () {
validateLayout(this.layout);
this.originalLayout = this.layout;
const self = this;
this.$nextTick(function() {
self.onWindowResize();
self.initResponsiveFeatures();
//self.width = self.$el.offsetWidth;
addWindowEventListener('resize', self.onWindowResize);
compact(self.layout, self.verticalCompact);
self.$emit('layout-updated',self.layout)
self.updateHeight();
self.$nextTick(function () {
this.erd = elementResizeDetectorMaker({
strategy: "scroll", //<- For ultra performance.
// See https://github.com/wnr/element-resize-detector/issues/110 about callOnAdd.
callOnAdd: false,
});
this.erd.listenTo(self.$refs.item, function () {
self.onWindowResize();
});
});
});
});
},
watch: {
width: function (newval, oldval) {
const self = this;
this.$nextTick(function () {
//this.$broadcast("updateWidth", this.width);
this.eventBus.$emit("updateWidth", this.width);
E if (oldval === null) {
/*
If oldval == null is when the width has never been
set before. That only occurs when mouting is
finished, and onWindowResize has been called and
this.width has been changed the first time after it
got set to null in the constructor. It is now time
to issue layout-ready events as the GridItems have
their sizes configured properly.
The reason for emitting the layout-ready events on
the next tick is to allow for the newly-emitted
updateWidth event (above) to have reached the
children GridItem-s and had their effect, so we're
sure that they have the final size before we emit
layout-ready (for this GridLayout) and
item-layout-ready (for the GridItem-s).
This way any client event handlers can reliably
invistigate stable sizes of GridItem-s.
*/
this.$nextTick(() => {
this.$emit('layout-ready', self.layout);
});
}
this.updateHeight();
});
},
layout: function () {
this.layoutUpdate();
},
colNum: function (val) {
this.eventBus.$emit("setColNum", val);
},
rowHeight: function() {
this.eventBus.$emit("setRowHeight", this.rowHeight);
},
isDraggable: function() {
this.eventBus.$emit("setDraggable", this.isDraggable);
},
isResizable: function() {
this.eventBus.$emit("setResizable", this.isResizable);
},
responsive() {
if (!this.responsive) {
this.$emit('update:layout', this.originalLayout);
this.eventBus.$emit("setColNum", this.colNum);
}
this.onWindowResize();
},
maxRows: function() {
this.eventBus.$emit("setMaxRows", this.maxRows);
},
margin() {
this.updateHeight();
}
},
methods: {
layoutUpdate() {
if (this.layout !== undefined && this.originalLayout !== null) {
if (this.layout.length !== this.originalLayout.length) {
// console.log("### LAYOUT UPDATE!", this.layout.length, this.originalLayout.length);
let diff = this.findDifference(this.layout, this.originalLayout);
if (diff.length > 0){
// console.log(diff);
if (this.layout.length > this.originalLayout.length) {
this.originalLayout = this.originalLayout.concat(diff);
} else {
this.originalLayout = this.originalLayout.filter(obj => {
return !diff.some(obj2 => {
return obj.i === obj2.i;
});
});
}
}
this.lastLayoutLength = this.layout.length;
this.initResponsiveFeatures();
}
compact(this.layout, this.verticalCompact);
this.eventBus.$emit("updateWidth", this.width);
this.updateHeight();
this.$emit('layout-updated',this.layout)
}
},
updateHeight: function () {
this.mergedStyle = {
height: this.containerHeight()
};
},
onWindowResize: function () {
E if (this.$refs !== null && this.$refs.item !== null && this.$refs.item !== undefined) {
this.width = this.$refs.item.offsetWidth;
}
this.eventBus.$emit("resizeEvent");
},
containerHeight: function () {
I if (!this.autoSize) return;
// console.log("bottom: " + bottom(this.layout))
// console.log("rowHeight + margins: " + (this.rowHeight + this.margin[1]) + this.margin[1])
const containerHeight = bottom(this.layout) * (this.rowHeight + this.margin[1]) + this.margin[1] + 'px';
return containerHeight;
},
dragEvent: function (eventName, id, x, y, h, w) {
//console.log(eventName + " id=" + id + ", x=" + x + ", y=" + y);
let l = getLayoutItem(this.layout, id);
//GetLayoutItem sometimes returns null object
if (l === undefined || l === null){
l = {x:0, y:0}
}
if (eventName === "dragstart" && !this.verticalCompact) {
this.positionsBeforeDrag = this.layout.reduce((result, {i, x, y}) => ({
...result,
[i]: {x, y}
}), {});
}
if (eventName === "dragmove" || eventName === "dragstart") {
this.placeholder.i = id;
this.placeholder.x = l.x;
this.placeholder.y = l.y;
this.placeholder.w = w;
this.placeholder.h = h;
this.$nextTick(function() {
this.isDragging = true;
});
//this.$broadcast("updateWidth", this.width);
this.eventBus.$emit("updateWidth", this.width);
} else {
this.$nextTick(function() {
this.isDragging = false;
});
}
// Move the element to the dragged location.
this.layout = moveElement(this.layout, l, x, y, true, this.preventCollision);
if (this.restoreOnDrag) {
// Do not compact items more than in layout before drag
// Set moved item as static to avoid to compact it
l.static = true;
compact(this.layout, this.verticalCompact, this.positionsBeforeDrag);
l.static = false;
} else {
compact(this.layout, this.verticalCompact);
}
// needed because vue can't detect changes on array element properties
this.eventBus.$emit("compact");
this.updateHeight();
if (eventName === 'dragend') {
delete this.positionsBeforeDrag;
this.$emit('layout-updated', this.layout);
}
},
resizeEvent: function (eventName, id, x, y, h, w) {
let l = getLayoutItem(this.layout, id);
//GetLayoutItem sometimes return null object
E if (l === undefined || l === null){
l = {h:0, w:0}
}
let hasCollisions;
I if (this.preventCollision) {
const collisions = getAllCollisions(this.layout, { ...l, w, h }).filter(
layoutItem => layoutItem.i !== l.i
);
hasCollisions = collisions.length > 0;
// If we're colliding, we need adjust the placeholder.
if (hasCollisions) {
// adjust w && h to maximum allowed space
let leastX = Infinity,
leastY = Infinity;
collisions.forEach(layoutItem => {
if (layoutItem.x > l.x) leastX = Math.min(leastX, layoutItem.x);
if (layoutItem.y > l.y) leastY = Math.min(leastY, layoutItem.y);
});
if (Number.isFinite(leastX)) l.w = leastX - l.x;
if (Number.isFinite(leastY)) l.h = leastY - l.y;
}
}
E if (!hasCollisions) {
// Set new width and height.
l.w = w;
l.h = h;
}
I if (eventName === "resizestart" || eventName === "resizemove") {
this.placeholder.i = id;
this.placeholder.x = x;
this.placeholder.y = y;
this.placeholder.w = l.w;
this.placeholder.h = l.h;
this.$nextTick(function() {
this.isDragging = true;
});
//this.$broadcast("updateWidth", this.width);
this.eventBus.$emit("updateWidth", this.width);
} else {
this.$nextTick(function() {
this.isDragging = false;
});
}
I if (this.responsive) this.responsiveGridLayout();
compact(this.layout, this.verticalCompact);
this.eventBus.$emit("compact");
this.updateHeight();
I if (eventName === 'resizeend') this.$emit('layout-updated', this.layout);
},
// finds or generates new layouts for set breakpoints
responsiveGridLayout(){
let newBreakpoint = getBreakpointFromWidth(this.breakpoints, this.width);
let newCols = getColsFromBreakpoint(newBreakpoint, this.cols);
// save actual layout in layouts
if(this.lastBreakpoint != null && !this.layouts[this.lastBreakpoint])
this.layouts[this.lastBreakpoint] = cloneLayout(this.layout);
// Find or generate a new layout.
let layout = findOrGenerateResponsiveLayout(
this.originalLayout,
this.layouts,
this.breakpoints,
newBreakpoint,
this.lastBreakpoint,
newCols,
this.verticalCompact
);
// Store the new layout.
this.layouts[newBreakpoint] = layout;
if (this.lastBreakpoint !== newBreakpoint) {
this.$emit('breakpoint-changed', newBreakpoint, layout);
}
// new prop sync
this.$emit('update:layout', layout);
this.lastBreakpoint = newBreakpoint;
this.eventBus.$emit("setColNum", getColsFromBreakpoint(newBreakpoint, this.cols));
},
// clear all responsive layouts
initResponsiveFeatures(){
// clear layouts
this.layouts = Object.assign({}, this.responsiveLayouts);
},
// find difference in layouts
findDifference(layout, originalLayout){
//Find values that are in result1 but not in result2
let uniqueResultOne = layout.filter(function(obj) {
return !originalLayout.some(function(obj2) {
return obj.i === obj2.i;
});
});
//Find values that are in result2 but not in result1
let uniqueResultTwo = originalLayout.filter(function(obj) {
return !layout.some(function(obj2) {
return obj.i === obj2.i;
});
});
//Combine the two arrays of unique entries#
return uniqueResultOne.concat(uniqueResultTwo);
}
},
}
</script>
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