1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
'use strict';
const round = Math.round;
// image width.
const imgW = 400;
// Gallery using bricks.js ////////////////////////////////////////////////////
const sizes = [
{ columns: 1, gutter: 30 },
{ mq: round((imgW * 2.2) + 40) + "px", columns: 2, gutter: 40 },
{ mq: round((imgW * 3.5) + 50) + "px", columns: 3, gutter: 50 },
{ mq: round((imgW * 4.5) + 50) + "px", columns: 4, gutter: 50 },
{ mq: round((imgW * 5.5) + 60) + "px", columns: 5, gutter: 60 },
];
const bricks = Bricks({
container: '#gallery',
packed: 'data-packed',
sizes: sizes
});
bricks
.on('pack', () => console.log('ALL grid items packed.'))
.on('update', () => console.log('NEW grid items packed.'))
.on('resize', size => console.log(
'The grid has be re-packed to accommodate a new BREAKPOINT.', size
));
document.addEventListener('DOMContentLoaded', event => {
bricks.resize(true).pack(); // bind resize handler & initial pack
});
/**
* packing should be done multiple times. Sometimes the div of
* directories is not properly packed if packing is done only once.
*/
// Packing after loading images ////////////////////////////////////////////
const showLoadingError = (message) => {
const loadError = document.getElementById("loading-error");
const loadErrorText = document.getElementById("loading-error-text");
const loadErrorDismiss = document.getElementById("loading-error-dismiss");
loadError.style.display = "block";
loadErrorText.innerHTML = message;
loadErrorDismiss.addEventListener('click', function(){
loadError.style.display = "none";
});
}
const onImagesLoaded = (container, event) => {
const images = container.getElementsByTagName("img");
const progressBar = document.getElementById("loading-progress");
// Keeps track of how many times we've packed the images.
let packed = 0;
const incrementPackedAndPack = () => {
packed++;
bricks.pack();
};
// failed keeps track of images that failed to load.
let failed = 0;
let remaining = images.length;
if (images.length === 0) {
showLoadingError("No images to display.");
event(remaining, failed, progressBar);
}
for (let i = 0; i < images.length; i++) {
if (images[i].complete)
remaining--;
else {
// Add listeners to images that have to be loaded.
images[i].addEventListener("load", function () {
remaining--;
progressBar.value = round(
((images.length - remaining) / images.length) * 100
);
// pack multiple times for better experience. This way
// the initial pictures are properly visible to the
// user while the other load. It's very cheap to pack
// lots of elements too using bricks.js so it's not an
// issue.
//
// There is no point in specifying such large ranges
// as this runs in a single thread to for sure we'll
// hit the range.
if (5 < progressBar.value && progressBar.value < 20)
if (packed < 2)
incrementPackedAndPack();
if (30 < progressBar.value && progressBar.value < 50)
if (packed < 4)
incrementPackedAndPack();
if (80 < progressBar.value && progressBar.value < 95)
if (packed < 5)
incrementPackedAndPack();
if (remaining === failed)
event(remaining, failed, progressBar);
});
// If loading fails then we increment failed, an error
// will be shown later.
images[i].addEventListener("error", function () {
failed++;
if (remaining === failed)
event(remaining, failed, progressBar);
});
}
if (remaining == failed)
event(remaining, failed, progressBar);
}
};
const gallery = document.getElementById("gallery");
const imagesLoaded = (remaining, failed, progressBar) => {
bricks.pack(); // packing images
progressBar.value = 100;
document.getElementById("loading").style.display = "none";
// Show error on failure.
if (failed !== 0) {
const t = failed === 1 ? "image" : "images";
showLoadingError(`${failed} ${t} failed to load.`);
}
};
onImagesLoaded(gallery, imagesLoaded);
|