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Pull to refresh work for scroll #56

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This commit is contained in:
Max Lynch
2013-11-07 17:38:33 -06:00
parent fd6f400ddd
commit d37ec6fca2
9 changed files with 230 additions and 310 deletions
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96
js/views/scrollView.js
View File

@ -29,6 +29,40 @@
toiletSeat: 'cubic-bezier(0.05, 0.60, 0.05, 0.60)'
};
/**
* The Pull To Refresh drag operation handles the well-known
* "pull to refresh" concept seen on various apps. This lets
* the user indicate they want to refresh a given list by dragging
* down.
*
* @param {object} opts the options for the pull to refresh drag.
*/
/*
var PullToRefreshDrag = function(opts) {
this.dragThresholdY = opts.dragThresholdY || 10;
this.onRefreshOpening = opts.onRefreshOpening || function() {};
this.onRefresh = opts.onRefresh || function() {};
this.onRefreshHolding = opts.onRefreshHolding || function() {};
this.el = opts.el;
};
PullToRefreshDrag.prototype.end = function(e, doneCallback) {
if(currentHeight > firstChildHeight) {
//this.refreshing();
} else {
// Enable animations
refresher.classList.add('list-refreshing');
refresher.style.height = '0px';
this.onRefresh && _this.onRefresh();
}
this._currentDrag = null;
doneCallback && doneCallback();
};
*/
ionic.views.Scroll = ionic.views.View.inherit({
initialize: function(opts) {
@ -46,6 +80,13 @@
scrollEventName: 'momentumScrolled',
scrollEndEventName: 'momentumScrollEnd',
hasPullToRefresh: true,
// Called as the refresher is opened, an amount is passed
onRefreshOpening: function() {},
// Called when let go and is refreshing
onRefresh: function() {},
// How frequently to fire scroll events in the case of
// a flick or momentum scroll where the finger is no longer
// touching the screen. If your event handler is a performance
@ -438,6 +479,12 @@
return;
}
// Grab the refresher element if using Pull to Refresh
if(this.hasPullToRefresh) {
this._refresher = document.querySelector('.scroll-refresher');
this._refresher.classList.remove('scroll-refreshing');
}
this.x = scrollLeft;
this.y = scrollTop;
@ -452,8 +499,6 @@
};
},
/**
* Process the drag event to move the item to the left or right.
*
@ -519,12 +564,10 @@
var newX = _this.x + deltaX;
var newY = _this.y + deltaY;
if(newX > 0 || (-newX + parentWidth) > totalWidth) {
// Rubber band
newX = _this.x + deltaX / _this.rubberBandResistance;
}
// Check if the dragging is beyond the bottom or top
if(newY > 0 || (-newY + parentHeight) > totalHeight) {
if(newY > 0) {
newY = _this.y + deltaY / _this.rubberBandResistance;
} else if ((-newY + parentHeight) > totalHeight) {
// Rubber band
newY = _this.y + deltaY / _this.rubberBandResistance;
}
@ -536,8 +579,25 @@
newY = 0;
}
// Update the new translated Y point of the container
_this.el.style.webkitTransform = 'translate3d(' + newX + 'px,' + newY + 'px, 0)';
if(_this._refresher && newY > 0) {
// We are pulling to refresh, so update the refresher
_this._refresher.style.height = newY + 'px';
var firstChildHeight = parseFloat(_this._refresher.firstElementChild.offsetHeight);
if(newY > firstChildHeight && !_this._isHoldingRefresh) {
_this._isHoldingRefresh = true;
// Trigger refresh holding event here
} else {
// Trigger refresh open amount
var ratio = Math.min(1, newY / firstChildHeight);
}
// Update the new translated Y point of the container
_this.el.style.webkitTransform = 'translate3d(' + newX + 'px,0, 0)';
} else {
// Update the new translated Y point of the container
_this.el.style.webkitTransform = 'translate3d(' + newX + 'px,' + newY + 'px, 0)';
}
// Store the last points
_this.x = newX;
@ -607,12 +667,28 @@
var time = 0;
var easing = '';
if(_this._refresher && _this.y > 0) {
// Pull to refresh
var firstChildHeight = parseFloat(_this._refresher.firstElementChild.offsetHeight);
if(Math.ceil(_this.y) >= firstChildHeight) {
// REFRESH
_this._refresher.classList.add('scroll-refreshing');
_this._refresher.style.height = firstChildHeight + 'px';
_this.onRefresh && _this.onRefresh();
} else {
_this._refresher.classList.add('scroll-refreshing');
_this._refresher.style.height = 0 + 'px';
_this.onRefresh && _this.onRefresh();
}
return;
}
var newX = Math.round(_this.x);
var newY = Math.round(_this.y);
_this._scrollTo(newX, newY);
// Check if we just snap back to bounds
if(_this.wrapScrollPosition(_this.bounceTime)) {
return;