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Slide to given slide index method

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This commit is contained in:
Max Lynch
2013-10-16 06:46:04 -05:00
parent 390d3b70bf
commit 1fcf7e6fbe
2 changed files with 160 additions and 86 deletions
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123
dist/js/ionic.js vendored
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@ -2291,10 +2291,90 @@ window.ionic = {
};
ionic.views.SlideBox.prototype = {
/**
* Slide to the given slide index.
*
* @param {integer} the index of the slide to animate to.
*/
slideToSlide: function(index) {
var content = this.el.firstElementChild;
if(!content) {
return;
}
var slideWidth = content.offsetWidth;
var offsetX = index * slideWidth;
var maxX = Math.max(0, content.children.length - 1) * slideWidth;
offsetX = offsetX < 0 ? 0 : offsetX > maxX ? maxX : offsetX;
content.classList.add('slide-box-animating');
content.style.webkitTransform = 'translate3d(' + -offsetX + 'px, 0, 0)';
// Update the slide index
this.slideIndex = Math.ceil(offsetX / slideWidth);
},
getSlideIndex: function() {
return this.slideIndex;
},
_initDrag: function() {
this._isDragging = false;
this._drag = null;
},
_handleEndDrag: function(e) {
var _this = this,
finalOffsetX, content, ratio, slideWidth, totalWidth, offsetX;
console.log("END");
window.requestAnimationFrame(function() {
// We didn't have a drag, so just init and leave
if(!_this._drag) {
_this._initDrag();
return;
}
// Snap to the correct spot
content = _this._drag.content;
// Enable transition duration
content.classList.add('slide-box-animating');
// Grab the current offset X position
offsetX = parseFloat(content.style.webkitTransform.replace('translate3d(', '').split(',')[0]) || 0;
slideWidth = content.offsetWidth;
totalWidth = content.offsetWidth * content.children.length;
// Calculate how far in this slide we've dragged
ratio = (offsetX % slideWidth) / slideWidth;
if(ratio >= 0) {
// Anything greater than zero is too far left
finalOffsetX = 0;
} else if(ratio >= -0.5) {
finalOffsetX = Math.max(0, Math.floor(Math.abs(offsetX) / slideWidth) * slideWidth);
} else {
// Sliiide to the right
finalOffsetX = Math.min(totalWidth - slideWidth, Math.ceil(Math.abs(offsetX) / slideWidth) * slideWidth);
}
_this.slideIndex = Math.ceil(finalOffsetX / slideWidth);
console.log('Slide index', slideIndex);
// Negative offsetX to slide correctly
content.style.webkitTransform = 'translate3d(' + -finalOffsetX + 'px, 0, 0)';
_this._initDrag();
});
},
/**
* Initialize a drag by grabbing the content area to drag, and any other
* info we might need for the dragging.
*/
_startDrag: function(e) {
var offsetX, content;
console.log("START");
@ -2320,49 +2400,6 @@ window.ionic = {
};
},
_handleEndDrag: function(e) {
var _this = this;
console.log("END");
var finalOffsetX, content, ratio, slideWidth, totalWidth, offsetX;
window.requestAnimationFrame(function() {
// We didn't have a drag, so just init and leave
if(!_this._drag) {
_this._initDrag();
return;
}
// Snap to the correct spot
content = _this._drag.content;
// Enable transition duration
content.classList.add('slide-box-animating');
offsetX = parseFloat(content.style.webkitTransform.replace('translate3d(', '').split(',')[0]) || 0;
slideWidth = content.offsetWidth;
totalWidth = content.offsetWidth * content.children.length;
// Calculate how far in this slide we've dragged
ratio = (offsetX % slideWidth) / slideWidth;
if(ratio >= 0) {
// Anything greater than zero is too far left
finalOffsetX = 0;
} else if(ratio >= -0.5) {
finalOffsetX = Math.max(0, Math.floor(Math.abs(offsetX) / slideWidth) * slideWidth);
} else {
// Sliiide to the right
finalOffsetX = Math.min(totalWidth - slideWidth, Math.ceil(Math.abs(offsetX) / slideWidth) * slideWidth);
}
// Negative offsetX to slide correctly
content.style.webkitTransform = 'translate3d(' + -finalOffsetX + 'px, 0, 0)';
_this._initDrag();
});
},
/**
* Process the drag event to move the item to the left or right.
*/