/** * Provides automatic scrolling of overflow regions in the page during drag operations. * * The ScrollManager configs will be used as the defaults for any scroll container registered with it, but you can also * override most of the configs per scroll container by adding a ddScrollConfig object to the target element that * contains these properties: {@link #hthresh}, {@link #vthresh}, {@link #increment} and {@link #frequency}. Example * usage: * * var el = Ext.get('scroll-ct'); * el.ddScrollConfig = { * vthresh: 50, * hthresh: -1, * frequency: 100, * increment: 200 * }; * Ext.dd.ScrollManager.register(el); * * Note: This class is designed to be used in "Point Mode */Ext.define('Ext.dd.ScrollManager', { singleton: true, requires: [ 'Ext.dd.DragDropManager' ], /** * The number of pixels from the top or bottom edge of a container the pointer needs to be to trigger scrolling */ vthresh: 25 * (window.devicePixelRatio || 1), /** * The number of pixels from the right or left edge of a container the pointer needs to be to trigger scrolling */ hthresh: 25 * (window.devicePixelRatio || 1), /** * The number of pixels to scroll in each scroll increment */ increment: 100, /** * The frequency of scrolls in milliseconds */ frequency: 500, /** * True to animate the scroll */ animate: true, /** * The animation duration in seconds - MUST BE less than Ext.dd.ScrollManager.frequency! */ animDuration: 0.4, /** * @property {String} ddGroup * The named drag drop {@link Ext.dd.DragSource#ddGroup group} to which this container belongs. If a ddGroup is * specified, then container scrolling will only occur when a dragged object is in the same ddGroup. */ ddGroup: undefined, dirTrans: { up: -1, left: -1, down: 1, right: 1 }, constructor: function() { var ddm = Ext.dd.DragDropManager; ddm.fireEvents = Ext.Function.createSequence(ddm.fireEvents, this.onFire, this); ddm.stopDrag = Ext.Function.createSequence(ddm.stopDrag, this.onStop, this); this.doScroll = this.doScroll.bind(this); this.ddmInstance = ddm; this.els = {}; this.dragEl = null; this.proc = {}; }, onStop: function(e){ var sm = Ext.dd.ScrollManager; sm.dragEl = null; sm.clearProc(); }, triggerRefresh: function() { if (this.ddmInstance.dragCurrent) { this.ddmInstance.refreshCache(this.ddmInstance.dragCurrent.groups); } }, doScroll: function() { var me = this; if (me.ddmInstance.dragCurrent) { var proc = me.proc, procEl = proc.el, scrollComponent = proc.component, ddScrollConfig = proc.el.ddScrollConfig, distance = ddScrollConfig && ddScrollConfig.increment ? ddScrollConfig.increment : me.increment, animate = ddScrollConfig && 'animate' in ddScrollConfig ? ddScrollConfig.animate : me.animate, afterScroll = function() { me.triggerRefresh(); }; if (animate) { if (animate === true) { animate = { callback: afterScroll }; } else { animate.callback = animate.callback ? Ext.Function.createSequence(animate.callback, afterScroll) : afterScroll; } } // If the element is the overflow element of a Component, and we are scrolling using CSS transform, // Then scroll using the correct method! if (scrollComponent) { // Left/right means increment has to be negated distance = distance * me.dirTrans[proc.dir]; // Pass X or Y params depending upon dimension being scrolled if (proc.dir === 'up' || proc.dir === 'down') { scrollComponent.scrollBy(0, distance, animate); } else { scrollComponent.scrollBy(distance, 0, animate); } } else { procEl.scroll(proc.dir, distance, animate); } if (!animate) { afterScroll(); } } }, clearProc: function() { var proc = this.proc; if (proc.id) { Ext.uninterval(proc.id); } proc.id = 0; proc.el = null; proc.dir = ""; }, startProc: function(el, dir) { var me = this, proc = me.proc, group, freq; me.clearProc(); proc.el = el; proc.dir = dir; group = el.ddScrollConfig ? el.ddScrollConfig.ddGroup : undefined; freq = (el.ddScrollConfig && el.ddScrollConfig.frequency) ? el.ddScrollConfig.frequency : me.frequency; if (group === undefined || me.ddmInstance.dragCurrent.ddGroup === group) { proc.id = Ext.interval(me.doScroll, freq); } }, onFire: function(e, isDrop) { var me = this, pt, proc, els, id, el, elementRegion, configSource, ownerCt, scrollerOwner; if (isDrop || !me.ddmInstance.dragCurrent) { return; } if (!me.dragEl || me.dragEl !== me.ddmInstance.dragCurrent) { me.dragEl = me.ddmInstance.dragCurrent; // refresh regions on drag start me.refreshCache(); } pt = e.getPoint(); proc = me.proc; els = me.els; for (id in els) { el = els[id]; elementRegion = el.getRegion(); configSource = el.ddScrollConfig || me; if (elementRegion && elementRegion.contains(pt)) { if (!el.isScrollable()) { ownerCt = el.component && el.component.ownerCt; scrollerOwner = ownerCt && ownerCt.getScrollerOwner && ownerCt.getScrollerOwner(); if (scrollerOwner) { el = scrollerOwner.getScrollable().getElement(); elementRegion = el.getRegion(); } else { continue; } } if (elementRegion.bottom - pt.y <= configSource.vthresh) { if(proc.el !== el){ me.startProc(el, "down"); } return; } else if (elementRegion.right - pt.x <= configSource.hthresh) { if (proc.el !== el) { me.startProc(el, "right"); } return; } else if (pt.y - elementRegion.top <= configSource.vthresh) { if (proc.el !== el) { me.startProc(el, "up"); } return; } else if (pt.x - elementRegion.left <= configSource.hthresh) { if (proc.el !== el) { me.startProc(el, "left"); } return; } } } me.clearProc(); }, /** * Registers new overflow element(s) to auto scroll * @param {String/HTMLElement/Ext.dom.Element/String[]/HTMLElement[]/Ext.dom.Element[]} el * The id of or the element to be scrolled or an array of either */ register: function(el) { if (Ext.isArray(el)) { for(var i = 0, len = el.length; i < len; i++) { this.register(el[i]); } } else { el = Ext.get(el); this.els[el.id] = el; } }, /** * Unregisters overflow element(s) so they are no longer scrolled * @param {String/HTMLElement/Ext.dom.Element/String[]/HTMLElement[]/Ext.dom.Element[]} el * The id of or the element to be removed or an array of either */ unregister: function(el) { if (Ext.isArray(el)){ for (var i = 0, len = el.length; i < len; i++) { this.unregister(el[i]); } } else { el = Ext.get(el); delete this.els[el.id]; } }, /** * Manually trigger a cache refresh. */ refreshCache: function() { var els = this.els, id; for (id in els) { if (typeof els[id] === 'object') { // for people extending the object prototype els[id]._region = els[id].getRegion(); } } }});