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urth-timeline.html
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urth-timeline.html
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<link rel="import" href="../polymer/polymer.html">
<dom-module id="urth-timeline">
<template>
<style>
#axis * {
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
.animating #window, .animating .handle-label, .animating .handle {
transition: all 1s ease;
}
.handle{
position:absolute;
display:inline-block;
background-color:rgb(76, 175, 80);
height:30%;
bottom:0%;
width:1%;
z-index:10;
cursor:ew-resize;
}
#axis {
height:50px;
position:relative;
background-color:rgba(170,170,170,0.1);
border-right:solid 1px #aaa;
border-left:solid 1px #aaa;
margin-bottom: 30px;
}
#window{
display:inline-block;
position:absolute;
background-color:rgb(76, 175, 80);
height:30%;
bottom:0%;
z-index:1;
opacity: 0.5;
cursor:move;
}
.handle-label {
position: absolute;
bottom: 100%;
left: -100%;
width: 200px;
font-size: 10px;
}
#axis-label-right {
right:0px;
}
.axis-label {
position: absolute;
top: 100%;
width: 200px;
font-size: 10px;
}
</style>
<div id='axis'>
<span class='axis-label'>{{startDate}}</span>
<div id='left_handle' class='handle' on-track='track' style$='{{compute_left_handle_style(window_start)}}'>
<span class='handle-label'>{{windowStartDate}}</span>
</div>
<div id='window' class='window' on-track='track' style$='{{compute_window_style(window_start, window_end)}}'>
</div>
<div id='right_handle' on-track='track' class='handle' style$='{{compute_right_handle_style(window_end)}}'>
<span class='handle-label'>{{windowEndDate}}</span>
</div>
<span id='axis-label-right' class='axis-label'>{{endDate}}</span>
</div>
</template>
<script>
Polymer({
is: "urth-timeline",
compute_left_handle_style: function(window_start){
return 'left:' + window_start + '%;';
},
compute_right_handle_style: function(window_end){
return 'left:' + window_end + '%;';
},
compute_window_style: function(window_start, window_end){
var width = window_end - window_start;
return 'left:' + window_start + '%; width:' + width + '%;'
},
computeChange : function(mouse_delta){
var timeline_width = this.$.axis.getBoundingClientRect().width;
var timeline_change = (this.end - this.start) * (mouse_delta / timeline_width);
return Math.round(timeline_change * 100) / 100;
},
computeWindowDates: function(){
var window = this.endDate.getTime() - this.startDate.getTime();
this.windowStartDate = new Date(this.startDate.getTime() + (window * (this.window_start/100)))
this.windowEndDate = new Date(this.startDate.getTime() + (window * (this.window_end/100)))
},
adjustWindow: function(){
this.$.axis.classList.add('animating')
if(this.window_end - this.window_start >= 75) {
var axis_length = (this.endDate.getTime() - this.startDate.getTime());
var additional_length = axis_length / 2;
var new_axis_length = axis_length * 2;
this.endDate = new Date(this.endDate.getTime() + additional_length);
this.startDate = new Date(this.startDate.getTime() - additional_length);
this.window_start = 100*((this.windowStartDate.getTime() - this.startDate.getTime()) / new_axis_length);
this.window_end = 100*((this.windowEndDate.getTime() - this.startDate.getTime()) / new_axis_length);
console.log('shrinkin');
}
if(this.window_end - this.window_start <= 25) {
var axis_length = (this.windowEndDate.getTime() - this.windowStartDate.getTime());
var additional_length = axis_length;
var new_axis_length = axis_length*3;
this.endDate = new Date(this.windowEndDate.getTime() + additional_length);
this.startDate = new Date(this.windowStartDate.getTime() - additional_length);
this.window_start = 100*((this.windowStartDate.getTime() - this.startDate.getTime()) / new_axis_length);
this.window_end = 100*((this.windowEndDate.getTime() - this.startDate.getTime()) / new_axis_length);
console.log('shrinkin');
}
if(this.window_start <= 5) {
var interval = this.endDate.getTime() - this.startDate.getTime();
var shift = interval * 0.25;
this.endDate = new Date(this.endDate.getTime() - shift);
this.startDate = new Date(this.startDate.getTime() - shift);
this.window_start += 25;
this.window_end += 25;
console.log('slide to the left');
}
if(this.window_end >= 95) {
var interval = this.endDate.getTime() - this.startDate.getTime();
var shift = interval * 0.25;
this.endDate = new Date(this.endDate.getTime() + shift);
this.startDate = new Date(this.startDate.getTime() + shift);
this.window_start -= 25;
this.window_end -= 25;
console.log('slide to the right');
}
setTimeout(function(){
this.$.axis.classList.remove('animating');
}.bind(this), 1500);
this.fire('window-changed', {window_start : this.windowStartDate, window_end :this.windowEndDate})
},
track: function(e) {
var change = this.computeChange(e.detail.ddx || 0);
if(e.target.track_condition(change)) {
e.target.track_effect(change)
}
this.computeWindowDates();
if(e.detail.state == 'end') {
this.adjustWindow();
}
this.computeWindowDates();
},
attached : function(){
// Bind the effects of the track events for each element
this.$.left_handle.track_effect = function(change){
this.window_start = parseFloat(this.$.left_handle.style.left) + change;
}.bind(this);
this.$.right_handle.track_effect = function(change){
this.window_end = parseFloat(this.$.right_handle.style.left) + change;
}.bind(this);
this.$.window.track_effect = function(change){
this.window_start = parseFloat(this.$.left_handle.style.left) + change;
this.window_end = parseFloat(this.$.right_handle.style.left) + change;
}.bind(this);
// Bind conditions to elements to determine if the track change is valid
this.$.left_handle.track_condition = function(change) {
var new_start = parseFloat(this.$.left_handle.style.left) + change;
return new_start >= this.start && new_start < this.window_end
}.bind(this);
this.$.right_handle.track_condition = function(change) {
var new_end = parseFloat(this.$.right_handle.style.left) + change
return new_end <= this.end && new_end > this.window_start
}.bind(this);
this.$.window.track_condition = function(change) {
var new_start = parseFloat(this.$.left_handle.style.left) + change;
var new_end = parseFloat(this.$.right_handle.style.left) + change;
return new_start >= this.start && new_end <= this.end;
}.bind(this);
this.computeWindowDates();
this.fire('window-changed', {window_start : this.windowStartDate, window_end :this.windowEndDate})
},
properties: {
windowStartDate : {
type : Date,
notify: true
},
window_start : {
type : Number,
notify: true,
value : 25
},
window_end : {
type : Number,
notify: true,
value : 75
},
windowEndDate : {
type : Date,
notify: true
},
start : {
type : Number,
notify: true,
value : 0
},
startDate : {
type : Date,
notify: true
},
end : {
type : Number,
notify: true,
value : 100
},
endDate : {
type : Date,
notify: true
},
}
});
</script>
</dom-module>