<!DOCTYPE html>
<html>
<head><title>Viewport Test</title>
<link rel="stylesheet" href="viewport.css">
<!--
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
-->
<meta name=viewport content="width=device-width, initial-scale=1.0, user-scalable=no">
</head>
<body>
<div class="flex-layout">
<div>
Canvas:
<input id="move-selector" type="button" value="Move"
onclick="toggleMove();">
<br>
</div>
<div class="container flex-box">
<canvas id="canvas" class="canvas">
Canvas not supported.
</canvas>
<br>
</div>
<div>
<br>
Results:<br>
<textarea id="messages" style="font-size: 9;" cols=80 rows=8></textarea>
</div>
</div>
</body>
<!--
<script type='text/javascript'
src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
-->
<script src="../include/util.js"></script>
<script src="../include/webutil.js"></script>
<script src="../include/base64.js"></script>
<script src="../include/keysymdef.js"></script>
<script src="../include/keyboard.js"></script>
<script src="../include/input.js"></script>
<script src="../include/display.js"></script>
<script>
var msg_cnt = 0, iterations,
penDown = false, doMove = false,
inMove = false, lastPos = {},
padW = 0, padH = 0,
display, ctx, keyboard, mouse;
var newline = "\n";
if (Util.Engine.trident) {
var newline = "<br>\n";
}
function message(str) {
console.log(str);
cell = $D('messages');
cell.innerHTML += msg_cnt + ": " + str + newline;
cell.scrollTop = cell.scrollHeight;
msg_cnt++;
}
function mouseButton(x, y, down, bmask) {
//msg = 'mouse x,y: ' + x + ',' + y + ' down: ' + down;
//msg += ' bmask: ' + bmask;
//message(msg);
if (doMove) {
if (down && !inMove) {
inMove = true;
lastPos = {'x': x, 'y': y};
} else if (!down && inMove) {
inMove = false;
//dirtyRedraw();
}
return;
}
if (down && ! penDown) {
penDown = true;
ctx.beginPath();
ctx.moveTo(x, y);
} else if (!down && penDown) {
penDown = false;
ctx.closePath();
}
}
function mouseMove(x, y) {
var deltaX, deltaY;
if (inMove) {
//deltaX = x - lastPos.x; // drag viewport
deltaX = lastPos.x - x; // drag frame buffer
//deltaY = y - lastPos.y; // drag viewport
deltaY = lastPos.y - y; // drag frame buffer
lastPos = {'x': x, 'y': y};
display.viewportChangePos(deltaX, deltaY);
return;
}
if (penDown) {
ctx.lineTo(x, y);
ctx.stroke();
}
}
function dirtyRedraw() {
if (inMove) {
// Wait for user to stop moving viewport
return;
}
var d = display.getCleanDirtyReset();
for (i = 0; i < d.dirtyBoxes.length; i++) {
//showBox(d.dirtyBoxes[i], "dirty[" + i + "]: ");
drawArea(d.dirtyBoxes[i]);
}
}
function drawArea(b) {
var data = [], pixel, x, y;
//message("draw "+b.x+","+b.y+" ("+b.w+","+b.h+")");
for (var i = 0; i < b.w; i++) {
x = b.x + i;
for (var j = 0; j < b.h; j++) {
y = b.y + j;
pixel = (j * b.w * 4 + i * 4);
data[pixel + 0] = ((x * y) / 13) % 256;
data[pixel + 1] = ((x * y) + 392) % 256;
data[pixel + 2] = ((x + y) + 256) % 256;
data[pixel + 3] = 255;
}
}
//message("i: " + i + ", j: " + j + ", pixel: " + pixel);
display.blitImage(b.x, b.y, b.w, b.h, data, 0);
}
function toggleMove() {
if (doMove) {
doMove = false;
$D('move-selector').style.backgroundColor = "";
$D('move-selector').style.color = "";
} else {
doMove = true;
$D('move-selector').style.backgroundColor = "black";
$D('move-selector').style.color = "lightgray";
}
}
function detectPad() {
var c = $D('canvas'), p = c.parentNode;
c.width = 10;
c.height = 10;
padW = c.offsetWidth - 10;
padH = c.offsetHeight - 10;
message("padW: " + padW + ", padH: " + padH);
}
function doResize() {
var p = $D('canvas').parentNode;
message("doResize1: [" + (p.offsetWidth - padW) +
"," + (p.offsetHeight - padH) + "]");
display.viewportChangeSize(p.offsetWidth - padW, p.offsetHeight - padH);
/*
var pos, new_w, new_h;pos
pos = Util.getPosition($D('canvas').parentNode);
new_w = window.innerWidth - pos.x;
new_h = window.innerHeight - pos.y;
display.viewportChangeSize(new_w, new_h);
*/
}
window.onload = function() {
detectPad();
display = new Display({'target': $D('canvas')});
display.resize(1600, 1024);
display.set_viewport(true);
ctx = display.get_context();
mouse = new Mouse({'target': $D('canvas'),
'onMouseButton': mouseButton,
'onMouseMove': mouseMove});
mouse.grab();
Util.addEvent(window, 'resize', doResize);
// Shrink viewport for first resize call so that the
// scrollbars are disabled
display.viewportChangeSize(10, 10);
setTimeout(doResize, 1);
setInterval(dirtyRedraw, 50);
message("Display initialized");
};
</script>
</html>