87 lines
13 KiB
JavaScript
87 lines
13 KiB
JavaScript
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export class GridsterSwap {
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constructor(gridsterItem) {
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this.gridsterItem = gridsterItem;
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this.gridster = gridsterItem.gridster;
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}
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destroy() {
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this.gridster = this.gridsterItem = this.swapedItem = null;
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}
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swapItems() {
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if (this.gridster.$options.swap) {
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this.checkSwapBack();
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this.checkSwap(this.gridsterItem);
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}
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}
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checkSwapBack() {
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if (this.swapedItem) {
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const x = this.swapedItem.$item.x;
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const y = this.swapedItem.$item.y;
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this.swapedItem.$item.x = this.swapedItem.item.x || 0;
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this.swapedItem.$item.y = this.swapedItem.item.y || 0;
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if (this.gridster.checkCollision(this.swapedItem.$item)) {
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this.swapedItem.$item.x = x;
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this.swapedItem.$item.y = y;
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}
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else {
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this.swapedItem.setSize();
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this.gridsterItem.$item.x = this.gridsterItem.item.x || 0;
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this.gridsterItem.$item.y = this.gridsterItem.item.y || 0;
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this.swapedItem = undefined;
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}
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}
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}
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restoreSwapItem() {
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if (this.swapedItem) {
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this.swapedItem.$item.x = this.swapedItem.item.x || 0;
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this.swapedItem.$item.y = this.swapedItem.item.y || 0;
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this.swapedItem.setSize();
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this.swapedItem = undefined;
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}
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}
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setSwapItem() {
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if (this.swapedItem) {
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this.swapedItem.checkItemChanges(this.swapedItem.$item, this.swapedItem.item);
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this.swapedItem = undefined;
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}
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}
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checkSwap(pushedBy) {
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let gridsterItemCollision;
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if (this.gridster.$options.swapWhileDragging) {
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gridsterItemCollision = this.gridster.checkCollisionForSwaping(pushedBy.$item);
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}
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else {
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gridsterItemCollision = this.gridster.checkCollision(pushedBy.$item);
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}
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if (gridsterItemCollision &&
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gridsterItemCollision !== true &&
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gridsterItemCollision.canBeDragged()) {
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const gridsterItemCollide = gridsterItemCollision;
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const copyCollisionX = gridsterItemCollide.$item.x;
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const copyCollisionY = gridsterItemCollide.$item.y;
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const copyX = pushedBy.$item.x;
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const copyY = pushedBy.$item.y;
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const diffX = copyX - copyCollisionX;
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const diffY = copyY - copyCollisionY;
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gridsterItemCollide.$item.x = pushedBy.item.x - diffX;
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gridsterItemCollide.$item.y = pushedBy.item.y - diffY;
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pushedBy.$item.x = gridsterItemCollide.item.x + diffX;
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pushedBy.$item.y = gridsterItemCollide.item.y + diffY;
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if (this.gridster.checkCollision(gridsterItemCollide.$item) ||
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this.gridster.checkCollision(pushedBy.$item)) {
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pushedBy.$item.x = copyX;
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pushedBy.$item.y = copyY;
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gridsterItemCollide.$item.x = copyCollisionX;
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gridsterItemCollide.$item.y = copyCollisionY;
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}
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else {
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gridsterItemCollide.setSize();
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this.swapedItem = gridsterItemCollide;
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if (this.gridster.$options.swapWhileDragging) {
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this.gridsterItem.checkItemChanges(this.gridsterItem.$item, this.gridsterItem.item);
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this.setSwapItem();
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}
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}
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}
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}
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}
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