@circlon/angular-tree-component
Version:
A simple yet powerful tree component for Angular
97 lines • 12.4 kB
JavaScript
import { Directive, Input, Renderer2, TemplateRef, ViewContainerRef } from '@angular/core';
const EASE_ACCELERATION = 1.005;
export class TreeAnimateOpenDirective {
constructor(renderer, templateRef, viewContainerRef) {
this.renderer = renderer;
this.templateRef = templateRef;
this.viewContainerRef = viewContainerRef;
}
set isOpen(value) {
if (value) {
this._show();
if (this.isEnabled && this._isOpen === false) {
this._animateOpen();
}
}
else {
this.isEnabled ? this._animateClose() : this._hide();
}
this._isOpen = !!value;
}
;
_show() {
if (this.innerElement)
return;
// create child view
this.innerElement = this.viewContainerRef.createEmbeddedView(this.templateRef).rootNodes[0];
}
_hide() {
this.viewContainerRef.clear();
this.innerElement = null;
}
_animateOpen() {
let delta = this.animateSpeed;
let ease = this.animateAcceleration;
let maxHeight = 0;
// set height to 0
this.renderer.setStyle(this.innerElement, 'max-height', `0`);
// increase maxHeight until height doesn't change
setTimeout(() => {
const i = setInterval(() => {
if (!this._isOpen || !this.innerElement)
return clearInterval(i);
maxHeight += delta;
const roundedMaxHeight = Math.round(maxHeight);
this.renderer.setStyle(this.innerElement, 'max-height', `${roundedMaxHeight}px`);
const height = this.innerElement.getBoundingClientRect ? this.innerElement.getBoundingClientRect().height : 0; // TBD use renderer
delta *= ease;
ease *= EASE_ACCELERATION;
if (height < roundedMaxHeight) {
// Make maxHeight auto because animation finished and container might change height later on
this.renderer.setStyle(this.innerElement, 'max-height', null);
clearInterval(i);
}
}, 17);
});
}
_animateClose() {
if (!this.innerElement)
return;
let delta = this.animateSpeed;
let ease = this.animateAcceleration;
let height = this.innerElement.getBoundingClientRect().height; // TBD use renderer
// slowly decrease maxHeight to 0, starting from current height
const i = setInterval(() => {
if (this._isOpen || !this.innerElement)
return clearInterval(i);
height -= delta;
this.renderer.setStyle(this.innerElement, 'max-height', `${height}px`);
delta *= ease;
ease *= EASE_ACCELERATION;
if (height <= 0) {
// after animation complete - remove child element
this.viewContainerRef.clear();
this.innerElement = null;
clearInterval(i);
}
}, 17);
}
}
TreeAnimateOpenDirective.decorators = [
{ type: Directive, args: [{
selector: '[treeAnimateOpen]'
},] }
];
/** @nocollapse */
TreeAnimateOpenDirective.ctorParameters = () => [
{ type: Renderer2 },
{ type: TemplateRef },
{ type: ViewContainerRef }
];
TreeAnimateOpenDirective.propDecorators = {
animateSpeed: [{ type: Input, args: ['treeAnimateOpenSpeed',] }],
animateAcceleration: [{ type: Input, args: ['treeAnimateOpenAcceleration',] }],
isEnabled: [{ type: Input, args: ['treeAnimateOpenEnabled',] }],
isOpen: [{ type: Input, args: ['treeAnimateOpen',] }]
};
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this._animateClose() : this._hide();\r\n    }\r\n    this._isOpen = !!value;\r\n  };\r\n\r\n  private innerElement: any;\r\n\r\n  constructor(\r\n    private renderer: Renderer2,\r\n    private templateRef: TemplateRef<any>,\r\n    private viewContainerRef: ViewContainerRef) {\r\n  }\r\n\r\n  private _show() {\r\n    if (this.innerElement) return;\r\n\r\n    // create child view\r\n    this.innerElement = this.viewContainerRef.createEmbeddedView(this.templateRef).rootNodes[0];\r\n  }\r\n\r\n  private _hide() {\r\n    this.viewContainerRef.clear();\r\n    this.innerElement = null;\r\n  }\r\n\r\n  private _animateOpen() {\r\n    let delta = this.animateSpeed;\r\n    let ease = this.animateAcceleration;\r\n    let maxHeight = 0;\r\n\r\n    // set height to 0\r\n    this.renderer.setStyle(this.innerElement, 'max-height', `0`);\r\n\r\n    // increase maxHeight until height doesn't change\r\n    setTimeout(() => { // Allow inner element to create its content\r\n      const i = setInterval(() => {\r\n        if (!this._isOpen || !this.innerElement) return clearInterval(i);\r\n\r\n        maxHeight += delta;\r\n        const roundedMaxHeight = Math.round(maxHeight);\r\n\r\n        this.renderer.setStyle(this.innerElement, 'max-height', `${roundedMaxHeight}px`);\r\n        const height = this.innerElement.getBoundingClientRect ? this.innerElement.getBoundingClientRect().height : 0; // TBD use renderer\r\n\r\n        delta *= ease;\r\n        ease *= EASE_ACCELERATION;\r\n        if (height < roundedMaxHeight) {\r\n          // Make maxHeight auto because animation finished and container might change height later on\r\n          this.renderer.setStyle(this.innerElement, 'max-height', null);\r\n          clearInterval(i);\r\n        }\r\n      }, 17);\r\n    });\r\n  }\r\n\r\n  private _animateClose() {\r\n    if (!this.innerElement) return;\r\n\r\n    let delta = this.animateSpeed;\r\n    let ease = this.animateAcceleration;\r\n    let height = this.innerElement.getBoundingClientRect().height; // TBD use renderer\r\n\r\n    // slowly decrease maxHeight to 0, starting from current height\r\n    const i = setInterval(() => {\r\n      if (this._isOpen || !this.innerElement) return clearInterval(i);\r\n\r\n      height -= delta;\r\n      this.renderer.setStyle(this.innerElement, 'max-height', `${height}px`);\r\n      delta *= ease;\r\n      ease *= EASE_ACCELERATION;\r\n\r\n      if (height <= 0) {\r\n        // after animation complete - remove child element\r\n        this.viewContainerRef.clear();\r\n        this.innerElement = null;\r\n        clearInterval(i);\r\n      }\r\n    }, 17);\r\n  }\r\n}\r\n"]}