| 1 |
<!DOCTYPE HTML> |
| 2 |
<html lang=en> |
| 3 |
<title>Canvas</title> |
| 4 |
<meta name="viewport" content="width=device-width"> |
| 5 |
<style> |
| 6 |
body { |
| 7 |
margin: 0; |
| 8 |
padding: 0; |
| 9 |
background: #C0C0C0; |
| 10 |
} |
| 11 |
canvas { |
| 12 |
width: 240px; |
| 13 |
background: white; |
| 14 |
} |
| 15 |
.mode-viewer canvas { |
| 16 |
width: 100%; |
| 17 |
} |
| 18 |
a { |
| 19 |
display: inline-block; |
| 20 |
min-width: 1em; |
| 21 |
text-align: center; |
| 22 |
} |
| 23 |
menu { |
| 24 |
position: fixed; |
| 25 |
bottom: 0; |
| 26 |
width: 100%; |
| 27 |
margin: 0; |
| 28 |
padding: 0; |
| 29 |
font-size: 8px; |
| 30 |
} |
| 31 |
.mode-editor menu .viewer-only, |
| 32 |
.mode-viewer menu .editor-only { |
| 33 |
display: none; |
| 34 |
} |
| 35 |
[hidden] { |
| 36 |
display: none; |
| 37 |
} |
| 38 |
#panel { |
| 39 |
position: absolute; |
| 40 |
left: 20px; |
| 41 |
width: 200px; /* 240px - 20px * 2 */ |
| 42 |
top: 20px; |
| 43 |
max-height: 120px; /* 160px - 20px * 2 */ |
| 44 |
overflow: auto; |
| 45 |
background-color: #C0C0C0; |
| 46 |
font-size: smaller; |
| 47 |
} |
| 48 |
#panel p { |
| 49 |
margin: 0; |
| 50 |
padding: 0; |
| 51 |
} |
| 52 |
</style> |
| 53 |
|
| 54 |
<body> |
| 55 |
|
| 56 |
<canvas width=240 height=160></canvas> |
| 57 |
|
| 58 |
<section id=panel hidden> |
| 59 |
|
| 60 |
<p> |
| 61 |
[<a href="javascript:setProp ('lineWidth', 1); togglePanel ()">1</a> |
| 62 |
<a href="javascript:setProp ('lineWidth', 2); togglePanel ()">2</a> |
| 63 |
<a href="javascript:setProp ('lineWidth', 3); togglePanel ()">3</a> |
| 64 |
<a href="javascript:setProp ('lineWidth', 5); togglePanel ()">5</a> |
| 65 |
<a href="javascript:setProp ('lineWidth', 10); togglePanel ()">10</a>] |
| 66 |
</p> |
| 67 |
|
| 68 |
<p> |
| 69 |
[<a href="javascript:setProp ('strokeStyle', 'black'); togglePanel ()" style="color: black">black</a> |
| 70 |
<a href="javascript:setProp ('strokeStyle', 'red'); togglePanel ()" style="color: red">red</a> |
| 71 |
<a href="javascript:setProp ('strokeStyle', 'green'); togglePanel ()" style="color: green">green</a> |
| 72 |
<a href="javascript:setProp ('strokeStyle', 'blue'); togglePanel ()" style="color: blue">blue</a> |
| 73 |
<a href="javascript:setProp ('strokeStyle', 'orange'); togglePanel ()" style="color: orange">orange</a> |
| 74 |
<a href="javascript:setProp ('strokeStyle', 'yellow'); togglePanel ()" style="color: yellow">yellow</a> |
| 75 |
<a href="javascript:setProp ('strokeStyle', 'pink'); togglePanel ()" style="color: pink">pink</a> |
| 76 |
<a href="javascript:setProp ('strokeStyle', 'purple'); togglePanel ()" style="color: purple">purple</a> |
| 77 |
<a href="javascript:setProp ('strokeStyle', 'gray'); togglePanel ()" style="color: gray">gray</a> |
| 78 |
<a href="javascript:setProp ('strokeStyle', 'white'); togglePanel ()" style="color: white">white</a>] |
| 79 |
</p> |
| 80 |
|
| 81 |
<hr> |
| 82 |
|
| 83 |
<p> |
| 84 |
<a href="javascript:savePNG (); togglePanel ()" class=editor-only>PNGize</a> |
| 85 |
<a href="javascript:haiku (); togglePanel ()" class=editor-only>Haiku</a> |
| 86 |
</p> |
| 87 |
|
| 88 |
<p> |
| 89 |
<a href="client.html?mode=editor" id=clone-link>Clone</a> |
| 90 |
<a href="client.html?mode=editor">New</a></menu> |
| 91 |
</p> |
| 92 |
|
| 93 |
<p> |
| 94 |
<a href="server.cgi?mode=list" rel=index>List</a> |
| 95 |
</p> |
| 96 |
|
| 97 |
</section> |
| 98 |
|
| 99 |
<menu><a href="javascript:togglePanel ()" class=editor-only>Panel</a> |
| 100 |
<a href="client.html?mode=editor" id=edit-link rel=edit class=viewer-only>Edit</a> |
| 101 |
<a href="client.html?mode=viewer" id=view-link class=editor-only>View</a> |
| 102 |
<a href="server.cgi?mode=prev" id=prev-link rel=prev>Prev</a> |
| 103 |
<a href="server.cgi?mode=next" id=next-link rel=next>Next</a></menu> |
| 104 |
|
| 105 |
<script> |
| 106 |
function $ (id) { return document.getElementById (id) } |
| 107 |
|
| 108 |
var canvas = document.getElementsByTagName('canvas')[0]; |
| 109 |
var ctx = canvas.getContext('2d'); |
| 110 |
ctx.lineCap = 'round'; |
| 111 |
ctx.lineWidth = 3; |
| 112 |
ctx.beginPath (); |
| 113 |
|
| 114 |
var date; |
| 115 |
var q = (location.search || '').replace (/^\?/, '').split (/[&;]/); |
| 116 |
var param = {}; |
| 117 |
for (var i = 0; i < q.length; i++) { |
| 118 |
var p = q[i].split (/=/); |
| 119 |
param[p[0]] = p[1]; |
| 120 |
} |
| 121 |
date = parseInt (param.date) || new Date ().valueOf (); |
| 122 |
var url = 'server.cgi?date=' + date; |
| 123 |
|
| 124 |
$('edit-link').href += ';date=' + date; |
| 125 |
$('view-link').href += ';date=' + date; |
| 126 |
$('prev-link').href += ';date=' + date; |
| 127 |
$('next-link').href += ';date=' + date; |
| 128 |
$('clone-link').href += ';import-date=' + date; |
| 129 |
|
| 130 |
param.mode = param.mode || 'editor'; |
| 131 |
document.body.className = 'mode-' + param.mode; |
| 132 |
|
| 133 |
var newEvents = []; |
| 134 |
|
| 135 |
if (param['import-date']) { |
| 136 |
newEvents = readRemoteImage ('server.cgi?date=' + param['import-date']); |
| 137 |
} |
| 138 |
|
| 139 |
if (param.mode == 'viewer') { |
| 140 |
readRemoteImage (); |
| 141 |
setInterval (readRemoteImage, 2000); |
| 142 |
} else { |
| 143 |
var drawing = false; |
| 144 |
canvas.onmousedown = function (ev) { |
| 145 |
drawing = true; |
| 146 |
ctx.beginPath (); |
| 147 |
var x = ev.clientX; |
| 148 |
var y = ev.clientY; |
| 149 |
ctx.moveTo (x, y); |
| 150 |
write ('moveTo', x, y); |
| 151 |
}; |
| 152 |
canvas.onmousemove = function (ev) { |
| 153 |
if (drawing) { |
| 154 |
var x = ev.clientX; |
| 155 |
var y = ev.clientY; |
| 156 |
ctx.lineTo (x, y); |
| 157 |
write ('lineTo', x, y); |
| 158 |
ctx.stroke (); |
| 159 |
// ctx.closePath (); |
| 160 |
// ctx.beginPath (); |
| 161 |
// ctx.moveTo (x, y); |
| 162 |
} |
| 163 |
}; |
| 164 |
window.onmouseup = function (ev) { |
| 165 |
if (!drawing) return; |
| 166 |
ctx.stroke (); |
| 167 |
ctx.closePath (); |
| 168 |
drawing = false; |
| 169 |
}; |
| 170 |
|
| 171 |
function write () { |
| 172 |
newEvents.push (Array.prototype.join.call (arguments, ',')); |
| 173 |
} |
| 174 |
|
| 175 |
readRemoteImage (); |
| 176 |
setInterval (function () { |
| 177 |
if (newEvents.length) { |
| 178 |
var xhr = new XMLHttpRequest (); |
| 179 |
xhr.open ('POST', url, true); |
| 180 |
xhr.setRequestHeader ('Content-Type', 'text/plain'); |
| 181 |
xhr.send (newEvents.join (';')); |
| 182 |
newEvents = []; |
| 183 |
} |
| 184 |
}, 2000); |
| 185 |
} |
| 186 |
|
| 187 |
function setProp (n, v) { |
| 188 |
ctx[n] = v; |
| 189 |
write (n, v); |
| 190 |
} |
| 191 |
|
| 192 |
function readRemoteImage (u) { |
| 193 |
u = u || url; |
| 194 |
var xhr = new XMLHttpRequest (); |
| 195 |
xhr.open ('GET', u, false); |
| 196 |
xhr.setRequestHeader ('Cache-Control', 'no-cache'); |
| 197 |
xhr.send (null); |
| 198 |
if (xhr.responseText) { |
| 199 |
var events = xhr.responseText.split (/\x0A/); |
| 200 |
if (events.length) { |
| 201 |
canvas.width = canvas.width; // clear |
| 202 |
processEvents(events); |
| 203 |
} |
| 204 |
return events; |
| 205 |
} |
| 206 |
return []; |
| 207 |
} |
| 208 |
|
| 209 |
function processEvents (events) { |
| 210 |
for (var i = 0; i < events.length; i++) { |
| 211 |
var ev = events[i].split (/,/); |
| 212 |
if (ev[0] == 'lineTo') { |
| 213 |
var x = parseFloat (ev[1]); |
| 214 |
var y = parseFloat (ev[2]); |
| 215 |
ctx.lineTo (x, y); |
| 216 |
ctx.stroke (); |
| 217 |
// ctx.closePath (); |
| 218 |
// ctx.beginPath (); |
| 219 |
// ctx.moveTo (x, y); |
| 220 |
} else if (ev[0] == 'moveTo') { |
| 221 |
var x = parseFloat (ev[1]); |
| 222 |
var y = parseFloat (ev[2]); |
| 223 |
ctx.moveTo (x, y); |
| 224 |
} else if (ev[0] == 'strokeStyle' || ev[0] == 'lineWidth') { |
| 225 |
ctx.closePath (); |
| 226 |
ctx.beginPath (); |
| 227 |
ctx[ev[0]] = ev[1]; |
| 228 |
} |
| 229 |
} |
| 230 |
} |
| 231 |
|
| 232 |
function togglePanel () { |
| 233 |
if ($('panel').hasAttribute ('hidden')) { |
| 234 |
$('panel').removeAttribute ('hidden'); |
| 235 |
} else { |
| 236 |
$('panel').setAttribute ('hidden', ''); |
| 237 |
} |
| 238 |
} |
| 239 |
|
| 240 |
function savePNG () { |
| 241 |
var data = canvas.toDataURL ('image/png'); |
| 242 |
var xhr = new XMLHttpRequest (); |
| 243 |
xhr.open ('POST', url + ';mode=png', false); |
| 244 |
xhr.setRequestHeader ('Content-Type', 'text/plain'); |
| 245 |
xhr.send (data); |
| 246 |
// if (xhr.status == 201) { |
| 247 |
// location.href = xhr.getResponseHeader ('Location'); |
| 248 |
// } |
| 249 |
} |
| 250 |
|
| 251 |
function haiku () { |
| 252 |
var purl = url.replace (/server\.cgi/, 'proxy.php'); |
| 253 |
var data = canvas.toDataURL ('image/png'); |
| 254 |
var xhr = new XMLHttpRequest (); |
| 255 |
xhr.open ('POST', purl + ';mode=haiku', true); |
| 256 |
xhr.setRequestHeader ('Content-Type', 'text/plain'); |
| 257 |
xhr.setRequestHeader ('X-Data-URL', data); |
| 258 |
xhr.send (null); |
| 259 |
} |
| 260 |
</script> |
Parent Directory
| 
Revision Log