primeng
Version:
[](https://opensource.org/licenses/MIT) [](https://badge.fury.io/js/primeng) [ • 10.4 kB
JavaScript
import { Component, ChangeDetectionStrategy, ViewEncapsulation, ElementRef, NgZone, ChangeDetectorRef, Input, ViewChild, ContentChildren, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { DomHandler } from 'primeng/dom';
import { PrimeTemplate } from 'primeng/api';
class ScrollPanel {
constructor(el, zone, cd) {
this.el = el;
this.zone = zone;
this.cd = cd;
this.timeoutFrame = (fn) => setTimeout(fn, 0);
}
ngAfterViewInit() {
this.zone.runOutsideAngular(() => {
this.moveBar();
this.moveBar = this.moveBar.bind(this);
this.onXBarMouseDown = this.onXBarMouseDown.bind(this);
this.onYBarMouseDown = this.onYBarMouseDown.bind(this);
this.onDocumentMouseMove = this.onDocumentMouseMove.bind(this);
this.onDocumentMouseUp = this.onDocumentMouseUp.bind(this);
window.addEventListener('resize', this.moveBar);
this.contentViewChild.nativeElement.addEventListener('scroll', this.moveBar);
this.contentViewChild.nativeElement.addEventListener('mouseenter', this.moveBar);
this.xBarViewChild.nativeElement.addEventListener('mousedown', this.onXBarMouseDown);
this.yBarViewChild.nativeElement.addEventListener('mousedown', this.onYBarMouseDown);
this.calculateContainerHeight();
this.initialized = true;
});
}
ngAfterContentInit() {
this.templates.forEach((item) => {
switch (item.getType()) {
case 'content':
this.contentTemplate = item.template;
break;
default:
this.contentTemplate = item.template;
break;
}
});
}
calculateContainerHeight() {
let container = this.containerViewChild.nativeElement;
let content = this.contentViewChild.nativeElement;
let xBar = this.xBarViewChild.nativeElement;
let containerStyles = getComputedStyle(container), xBarStyles = getComputedStyle(xBar), pureContainerHeight = DomHandler.getHeight(container) - parseInt(xBarStyles['height'], 10);
if (containerStyles['max-height'] != "none" && pureContainerHeight == 0) {
if (content.offsetHeight + parseInt(xBarStyles['height'], 10) > parseInt(containerStyles['max-height'], 10)) {
container.style.height = containerStyles['max-height'];
}
else {
container.style.height = content.offsetHeight + parseFloat(containerStyles.paddingTop) + parseFloat(containerStyles.paddingBottom) + parseFloat(containerStyles.borderTopWidth) + parseFloat(containerStyles.borderBottomWidth) + "px";
}
}
}
moveBar() {
let container = this.containerViewChild.nativeElement;
let content = this.contentViewChild.nativeElement;
/* horizontal scroll */
let xBar = this.xBarViewChild.nativeElement;
let totalWidth = content.scrollWidth;
let ownWidth = content.clientWidth;
let bottom = (container.clientHeight - xBar.clientHeight) * -1;
this.scrollXRatio = ownWidth / totalWidth;
/* vertical scroll */
let yBar = this.yBarViewChild.nativeElement;
let totalHeight = content.scrollHeight;
let ownHeight = content.clientHeight;
let right = (container.clientWidth - yBar.clientWidth) * -1;
this.scrollYRatio = ownHeight / totalHeight;
this.requestAnimationFrame(() => {
if (this.scrollXRatio >= 1) {
DomHandler.addClass(xBar, 'p-scrollpanel-hidden');
}
else {
DomHandler.removeClass(xBar, 'p-scrollpanel-hidden');
const xBarWidth = Math.max(this.scrollXRatio * 100, 10);
const xBarLeft = content.scrollLeft * (100 - xBarWidth) / (totalWidth - ownWidth);
xBar.style.cssText = 'width:' + xBarWidth + '%; left:' + xBarLeft + '%;bottom:' + bottom + 'px;';
}
if (this.scrollYRatio >= 1) {
DomHandler.addClass(yBar, 'p-scrollpanel-hidden');
}
else {
DomHandler.removeClass(yBar, 'p-scrollpanel-hidden');
const yBarHeight = Math.max(this.scrollYRatio * 100, 10);
const yBarTop = content.scrollTop * (100 - yBarHeight) / (totalHeight - ownHeight);
yBar.style.cssText = 'height:' + yBarHeight + '%; top: calc(' + yBarTop + '% - ' + xBar.clientHeight + 'px);right:' + right + 'px;';
}
});
this.cd.markForCheck();
}
onYBarMouseDown(e) {
this.isYBarClicked = true;
this.lastPageY = e.pageY;
DomHandler.addClass(this.yBarViewChild.nativeElement, 'p-scrollpanel-grabbed');
DomHandler.addClass(document.body, 'p-scrollpanel-grabbed');
document.addEventListener('mousemove', this.onDocumentMouseMove);
document.addEventListener('mouseup', this.onDocumentMouseUp);
e.preventDefault();
}
onXBarMouseDown(e) {
this.isXBarClicked = true;
this.lastPageX = e.pageX;
DomHandler.addClass(this.xBarViewChild.nativeElement, 'p-scrollpanel-grabbed');
DomHandler.addClass(document.body, 'p-scrollpanel-grabbed');
document.addEventListener('mousemove', this.onDocumentMouseMove);
document.addEventListener('mouseup', this.onDocumentMouseUp);
e.preventDefault();
}
onDocumentMouseMove(e) {
if (this.isXBarClicked) {
this.onMouseMoveForXBar(e);
}
else if (this.isYBarClicked) {
this.onMouseMoveForYBar(e);
}
else {
this.onMouseMoveForXBar(e);
this.onMouseMoveForYBar(e);
}
}
onMouseMoveForXBar(e) {
let deltaX = e.pageX - this.lastPageX;
this.lastPageX = e.pageX;
this.requestAnimationFrame(() => {
this.contentViewChild.nativeElement.scrollLeft += deltaX / this.scrollXRatio;
});
}
onMouseMoveForYBar(e) {
let deltaY = e.pageY - this.lastPageY;
this.lastPageY = e.pageY;
this.requestAnimationFrame(() => {
this.contentViewChild.nativeElement.scrollTop += deltaY / this.scrollYRatio;
});
}
scrollTop(scrollTop) {
let scrollableHeight = this.contentViewChild.nativeElement.scrollHeight - this.contentViewChild.nativeElement.clientHeight;
scrollTop = scrollTop > scrollableHeight ? scrollableHeight : scrollTop > 0 ? scrollTop : 0;
this.contentViewChild.nativeElement.scrollTop = scrollTop;
}
onDocumentMouseUp(e) {
DomHandler.removeClass(this.yBarViewChild.nativeElement, 'p-scrollpanel-grabbed');
DomHandler.removeClass(this.xBarViewChild.nativeElement, 'p-scrollpanel-grabbed');
DomHandler.removeClass(document.body, 'p-scrollpanel-grabbed');
document.removeEventListener('mousemove', this.onDocumentMouseMove);
document.removeEventListener('mouseup', this.onDocumentMouseUp);
this.isXBarClicked = false;
this.isYBarClicked = false;
}
requestAnimationFrame(f) {
let frame = window.requestAnimationFrame || this.timeoutFrame;
frame(f);
}
ngOnDestroy() {
if (this.initialized) {
window.removeEventListener('resize', this.moveBar);
this.contentViewChild.nativeElement.removeEventListener('scroll', this.moveBar);
this.contentViewChild.nativeElement.removeEventListener('mouseenter', this.moveBar);
this.xBarViewChild.nativeElement.removeEventListener('mousedown', this.onXBarMouseDown);
this.yBarViewChild.nativeElement.removeEventListener('mousedown', this.onYBarMouseDown);
}
}
refresh() {
this.moveBar();
}
}
ScrollPanel.decorators = [
{ type: Component, args: [{
selector: 'p-scrollPanel',
template: `
<div #container [ngClass]="'p-scrollpanel p-component'" [ngStyle]="style" [class]="styleClass">
<div class="p-scrollpanel-wrapper">
<div #content class="p-scrollpanel-content">
<ng-content></ng-content>
<ng-container *ngTemplateOutlet="contentTemplate"></ng-container>
</div>
</div>
<div #xBar class="p-scrollpanel-bar p-scrollpanel-bar-x"></div>
<div #yBar class="p-scrollpanel-bar p-scrollpanel-bar-y"></div>
</div>
`,
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None,
styles: [".p-scrollpanel-wrapper{float:left;height:100%;overflow:hidden;position:relative;width:100%;z-index:1}.p-scrollpanel-content{box-sizing:border-box;height:calc(100% + 18px);overflow:auto;padding:0 18px 18px 0;position:relative;width:calc(100% + 18px)}.p-scrollpanel-bar{background:#c1c1c1;border-radius:3px;cursor:pointer;opacity:0;position:relative;transition:opacity .25s linear;z-index:2}.p-scrollpanel-bar-y{top:0;width:9px}.p-scrollpanel-bar-x{bottom:0;height:9px}.p-scrollpanel-hidden{visibility:hidden}.p-scrollpanel:active .p-scrollpanel-bar,.p-scrollpanel:hover .p-scrollpanel-bar{opacity:1}.p-scrollpanel-grabbed{-ms-user-select:none;-webkit-user-select:none;user-select:none}"]
},] }
];
ScrollPanel.ctorParameters = () => [
{ type: ElementRef },
{ type: NgZone },
{ type: ChangeDetectorRef }
];
ScrollPanel.propDecorators = {
style: [{ type: Input }],
styleClass: [{ type: Input }],
containerViewChild: [{ type: ViewChild, args: ['container',] }],
contentViewChild: [{ type: ViewChild, args: ['content',] }],
xBarViewChild: [{ type: ViewChild, args: ['xBar',] }],
yBarViewChild: [{ type: ViewChild, args: ['yBar',] }],
templates: [{ type: ContentChildren, args: [PrimeTemplate,] }]
};
class ScrollPanelModule {
}
ScrollPanelModule.decorators = [
{ type: NgModule, args: [{
imports: [CommonModule],
exports: [ScrollPanel],
declarations: [ScrollPanel]
},] }
];
/**
* Generated bundle index. Do not edit.
*/
export { ScrollPanel, ScrollPanelModule };
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