jQuery DOM Insertion, Inside & Outside

Posted on 2018-08-01 by hoyo

如何控制插入內容相對於對象的位置

jQuery 插入內容時可以使用 append(), prepend(), before(), after() 四個函式，不同的函式插入的位置不同

<div id="aaa" style="border: 1px solid #aaa;">aaaaa</div>

<script>
    $('#aaa').before('<div>before 1</div>');
    $('#aaa').before('<div>before 2</div>');

    $('#aaa').after('<div>after 1</div>');
    $('#aaa').after('<div>after 2</div>');

    $('#aaa').append('<div>append 1</div>');
    $('#aaa').append('<div>append 2</div>');

    $('#aaa').prepend('<div>prepend 1</div>');
    $('#aaa').prepend('<div>prepend 2</div>');
</script>

<div id="aaa" style="border: 1px solid #aaa;">aaaaa</div>

$('#aaa').before('<div>before 1</div>');

$('#aaa').before('<div>before 2</div>');

$('#aaa').after('<div>after 1</div>');

$('#aaa').after('<div>after 2</div>');

$('#aaa').append('<div>append 1</div>');

$('#aaa').append('<div>append 2</div>');

$('#aaa').prepend('<div>prepend 1</div>');

$('#aaa').prepend('<div>prepend 2</div>');

</script>

—

網頁或網頁內元素是否作用中 (可視)

Posted on 2017-06-09 by hoyo

$(function(){

    // 頁面作用才更新資料
    window.onfocus = function(){
        setInterval(function(){
            search();
        }, 10000);
    };
    window.onblur = function(){
        for (var i = 1; i < 9; i++) window.clearInterval(i);
    };
});

$(function(){

// 頁面作用才更新資料

window.onfocus = function(){

setInterval(function(){

search();

}, 10000);

};

window.onblur = function(){

for (var i = 1; i < 9; i++) window.clearInterval(i);

};

});

—

元素出現就作用

How to tell if a DOM element is visible in the current viewport?
http://jsfiddle.net/AndyE/d48Cv/1/
jquery.inview2

$('div').bind('inview', function(event, isInView) {
    if (isInView) {
        $(this).css('background-color', '#f00');
    } else {
        $(this).css('background-color', '#00f');
    }
});

$('div').bind('inview', function(event, isInView) {

if (isInView) {

$(this).css('background-color', '#f00');

} else {

$(this).css('background-color', '#00f');

}

});

—

元素完整出現才作用

<div style="width: 300px; height: 300px;">
    <p>C</p>
</div>
<hr/>

<script>
    $(window).scroll(function() {
        $('div:in-viewport(-320)').css({
            'background-color': '#f00',
            'color': '#151612'
        }).find('p').text('Now in viewport.');
    });
</script>

</div>

<hr/>

$(window).scroll(function() {

$('div:in-viewport(-320)').css({

'background-color': '#f00',

'color': '#151612'

}).find('p').text('Now in viewport.');

});

</script>

—

Canvas framework

Posted on 2016-11-24 by hoyo

—

應用

—

hoyo 自己的應用

需求為從主機載入一張圖之後，可以增加箭頭、文字、方框等基本的繪圖需求，編輯完成按儲存後要直接回存。

技術：HTML5 Canvas

使用工具：Fabric.js

參考

Add Delete button on element in Canvas Fabric JS

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="../js/jquery-2.2.4.min.js"></script>
    <script src="../js/fabric.min.js"></script>
</head>
<body>

<canvas id="c" style="border: 1px solid #999;"></canvas>

<button onclick="addText()">增加文字</button>
<button onclick="addBlock()">增加方框</button>
<button onclick="addLine2()">增加箭頭</button>
<button onclick="saveImage()">儲存</button>

<script>
    var canvas = new fabric.Canvas('c');

    var HideControls = {
        'tl':true,
        'tr':false,
        'bl':true,
        'br':true,
        'ml':true,
        'mt':true,
        'mr':true,
        'mb':true,
        'mtr':true
    };

    var image = new Image();
    image.src = 'normal_3206.png';
    image.onload = function() {

        // create a wrapper around native canvas element (with id="c")
        canvas.setHeight(image.width).setWidth(image.height);

        canvas.setBackgroundImage('normal_3206.png', canvas.renderAll.bind(canvas), {
            width: canvas.width,
            height: canvas.height,
            // Needed to position backgroundImage at 0/0
            originX: 'left',
            originY: 'top'
        });
    };

    canvas.renderAll();

    function addDeleteBtn(x, y){
        $(".deleteBtn").remove();
        var btnLeft = x-10;
        var btnTop = y-10;
        var deleteBtn = '<img src="../images/delete-icon.png" class="deleteBtn" style="position:absolute;top:'+btnTop+'px;left:'+btnLeft+'px;cursor:pointer;width:20px;height:20px;"/>';
        $(".canvas-container").append(deleteBtn);
    }

    canvas.on('object:selected',function(e){
        addDeleteBtn(e.target.oCoords.tr.x, e.target.oCoords.tr.y);
    });

    canvas.on('mouse:down',function(e){
        if(!canvas.getActiveObject())
        {
            $(".deleteBtn").remove();
        }
    });

    canvas.on('object:modified',function(e){
        addDeleteBtn(e.target.oCoords.tr.x, e.target.oCoords.tr.y);
    });

    canvas.on('object:scaling',function(e){
        $(".deleteBtn").remove();
    });
    canvas.on('object:moving',function(e){
        $(".deleteBtn").remove();
    });
    canvas.on('object:rotating',function(e){
        $(".deleteBtn").remove();
    });
    $(document).on('click',".deleteBtn",function(){
        if(canvas.getActiveObject())
        {
            canvas.remove(canvas.getActiveObject());
            $(".deleteBtn").remove();
        }
    });

    // ----------------------------------------

    function addBlock(){
        var rect = new fabric.Rect({
            stroke: 'rgb(255,0,0)',
            strokeWidth: 3,
            width: 100, height: 40,
            fill: false, left: 50, top: 50
        }).setControlsVisibility(HideControls);

        canvas.add(rect);
    }

    function addText() {
        var t = new fabric.IText('Tap and Type', {
            fontFamily: 'arial black',
            left: 100,
            top: 100
        });

        var textWithBackground = new fabric.IText('輸入文字', {
            left: 50,
            top: 50,
            textBackgroundColor: 'rgb(255,255,255)'
        }).setControlsVisibility(HideControls);
        canvas.add(textWithBackground);
    }

    function addLine2(){
        var path = new fabric.Path('M512 246.16H36.504l86.98-87.43v-27.895L0 254.943v2.115l123.474 124.107h.01V353.26l-86.98-87.42H512z', {
                    stroke: 'rgb(255,255,255)',
                    strokeWidth: 8,
                    fill: 'rgb(255,0,0)'
                }
        ).scaleToWidth(100).setControlsVisibility(HideControls);

        canvas.add(path);
    }

    // 送出處理後圖像給 PHP
    function saveImage() {
        request = new XMLHttpRequest();
        request.open('POST', 'c1.php', true);

        var $Json = {};
        $Json['image'] = canvas.toDataURL();
        $Json['id'] = 'aa111';
        request.send( JSON.stringify($Json) );
    }

</script>
</body>
</html>

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<!DOCTYPE html>

<html>

<head>

</head>

<body>

var canvas = new fabric.Canvas('c');

var HideControls = {

'tl':true,

'tr':false,

'bl':true,

'br':true,

'ml':true,

'mt':true,

'mr':true,

'mb':true,

'mtr':true

};

var image = new Image();

image.src = 'normal_3206.png';

image.onload = function() {

// create a wrapper around native canvas element (with id="c")

canvas.setHeight(image.width).setWidth(image.height);

canvas.setBackgroundImage('normal_3206.png', canvas.renderAll.bind(canvas), {

width: canvas.width,

height: canvas.height,

// Needed to position backgroundImage at 0/0

originX: 'left',

originY: 'top'

});

};

canvas.renderAll();

function addDeleteBtn(x, y){

$(".deleteBtn").remove();

var btnLeft = x-10;

var btnTop = y-10;

var deleteBtn = '<img src="../images/delete-icon.png" class="deleteBtn" style="position:absolute;top:'+btnTop+'px;left:'+btnLeft+'px;cursor:pointer;width:20px;height:20px;"/>';

$(".canvas-container").append(deleteBtn);

}

canvas.on('object:selected',function(e){

addDeleteBtn(e.target.oCoords.tr.x, e.target.oCoords.tr.y);

});

canvas.on('mouse:down',function(e){

if(!canvas.getActiveObject())

{

$(".deleteBtn").remove();

}

});

canvas.on('object:modified',function(e){

addDeleteBtn(e.target.oCoords.tr.x, e.target.oCoords.tr.y);

});

canvas.on('object:scaling',function(e){

$(".deleteBtn").remove();

});

canvas.on('object:moving',function(e){

$(".deleteBtn").remove();

});

canvas.on('object:rotating',function(e){

$(".deleteBtn").remove();

});

$(document).on('click',".deleteBtn",function(){

if(canvas.getActiveObject())

{

canvas.remove(canvas.getActiveObject());

$(".deleteBtn").remove();

}

});

// ----------------------------------------

function addBlock(){

var rect = new fabric.Rect({

stroke: 'rgb(255,0,0)',

strokeWidth: 3,

width: 100, height: 40,

fill: false, left: 50, top: 50

}).setControlsVisibility(HideControls);

canvas.add(rect);

}

function addText() {

var t = new fabric.IText('Tap and Type', {

fontFamily: 'arial black',

left: 100,

top: 100

});

var textWithBackground = new fabric.IText('輸入文字', {

left: 50,

top: 50,

textBackgroundColor: 'rgb(255,255,255)'

}).setControlsVisibility(HideControls);

canvas.add(textWithBackground);

}

function addLine2(){

var path = new fabric.Path('M512 246.16H36.504l86.98-87.43v-27.895L0 254.943v2.115l123.474 124.107h.01V353.26l-86.98-87.42H512z', {

stroke: 'rgb(255,255,255)',

strokeWidth: 8,

fill: 'rgb(255,0,0)'

}

).scaleToWidth(100).setControlsVisibility(HideControls);

canvas.add(path);

}

// 送出處理後圖像給 PHP

function saveImage() {

request = new XMLHttpRequest();

request.open('POST', 'c1.php', true);

var $Json = {};

$Json['image'] = canvas.toDataURL();

$Json['id'] = 'aa111';

request.send( JSON.stringify($Json) );

}

</script>

</body>

</html>

—

Web Audio API – 使用

Posted on 2016-10-28 by hoyo

參考

—

實作

使用 Canvas 繪圖

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script src="../js/jquery-1.11.3.min.js"></script>
</head>
<body>

<div id="example">
    <audio id="player" class="hideIfNoApi" controls="controls" src="http://ianreah.apphb.com/sounds/movement%20proposition.mp3" crossorigin="anonymous"> </audio>

    <div id="visualisation" class="hideIfNoApi"> </div>
</div>

<div id="visualizer_wrapper">
    <canvas id='canvas' width="702" height="350" style="border: 1px #eee solid;"></canvas>
</div>

<script>
    $(function () {
        context = new (window.AudioContext || window.webkitAudioContext)();
        
        // Create the analyser
        var analyser = context.createAnalyser();
        
        // https://developer.mozilla.org/zh-TW/docs/Web/API/AnalyserNode/fftSize
        analyser.fftSize = 64;
        
        // Get the frequency data and update the visualisation
        function update() {
            var canvas = document.getElementById('canvas'),
                    cwidth = canvas.width,
                    cheight = canvas.height - 2,
                    meterWidth = 20, //width of the meters in the spectrum
                    gap = 2, //gap between meters
                    capHeight = 2,
                    capStyle = '#fff',
                    meterNum = 702 / (10 + 2), //count of the meters
                    capYPositionArray = []; //store the vertical position of hte caps for the preivous frame
            ctx = canvas.getContext('2d');
            gradient = ctx.createLinearGradient(0, 0, 0, 300);
            gradient.addColorStop(1, '#0f0');
            gradient.addColorStop(0.5, '#ff0');
            gradient.addColorStop(0, '#f00');

            var drawMeter = function() {
                var array = new Uint8Array(analyser.frequencyBinCount);
                
                analyser.getByteFrequencyData(array);
                ctx.clearRect(0, 0, cwidth, cheight);
                
                for (var i = 0; i < array.length; i++) {
                    var value = array[i];
                    if (capYPositionArray.length < Math.round(meterNum)) {
                        capYPositionArray.push(value);
                    }
                    ctx.fillStyle = gradient; //set the filllStyle to gradient for a better look
                    ctx.fillRect(i * 22 /*频谱条的宽度+条间间距*/ , cheight - value + capHeight, meterWidth, cheight);
                }
                requestAnimationFrame(drawMeter);
            };
            
            requestAnimationFrame(drawMeter);
        }

        // Hook up the audio routing...
        // player -> analyser -> speakers
        // (Do this after the player is ready to play - https://code.google.com/p/chromium/issues/detail?id=112368#c4)
        $("#player").bind('canplay', function() {
            var source = context.createMediaElementSource(this);
            source.connect(analyser);
            analyser.connect(context.destination);

            update();
        });
    });
</script>

</body>
</html>

<!DOCTYPE html>

<html>

</head>

<body>

</div>

</div>

$(function () {

context = new (window.AudioContext || window.webkitAudioContext)();

// Create the analyser

var analyser = context.createAnalyser();

// https://developer.mozilla.org/zh-TW/docs/Web/API/AnalyserNode/fftSize

analyser.fftSize = 64;

// Get the frequency data and update the visualisation

function update() {

var canvas = document.getElementById('canvas'),

cwidth = canvas.width,

cheight = canvas.height - 2,

meterWidth = 20, //width of the meters in the spectrum

gap = 2, //gap between meters

capHeight = 2,

capStyle = '#fff',

meterNum = 702 / (10 + 2), //count of the meters

capYPositionArray = []; //store the vertical position of hte caps for the preivous frame

ctx = canvas.getContext('2d');

gradient = ctx.createLinearGradient(0, 0, 0, 300);

gradient.addColorStop(1, '#0f0');

gradient.addColorStop(0.5, '#ff0');

gradient.addColorStop(0, '#f00');

var drawMeter = function() {

var array = new Uint8Array(analyser.frequencyBinCount);

analyser.getByteFrequencyData(array);

ctx.clearRect(0, 0, cwidth, cheight);

for (var i = 0; i < array.length; i++) {

var value = array[i];

if (capYPositionArray.length < Math.round(meterNum)) {

capYPositionArray.push(value);

}

ctx.fillStyle = gradient; //set the filllStyle to gradient for a better look

ctx.fillRect(i * 22 /*频谱条的宽度+条间间距*/ , cheight - value + capHeight, meterWidth, cheight);

}

requestAnimationFrame(drawMeter);

};

requestAnimationFrame(drawMeter);

}

// Hook up the audio routing...

// player -> analyser -> speakers

// (Do this after the player is ready to play - https://code.google.com/p/chromium/issues/detail?id=112368#c4)

$("#player").bind('canplay', function() {

var source = context.createMediaElementSource(this);

source.connect(analyser);

analyser.connect(context.destination);

update();

});

</script>

</body>

</html>

analyser.fftSize
設定值除以 2 就是陣列取樣數，預設 2048
analyser.getByteFrequencyData(Uint8Array(analyser.frequencyBinCount));
數值在 0 – 255 ，沒聲音為 0
analyser.getByteTimeDomainData(Uint8Array(analyser.frequencyBinCount));
數值在 0 – 255 ，沒聲音為 128
requestAnimationFrame 根據瀏覽器設定(一般來說是 60fps) 更新
能量條的高度是根據 0-255 所繪製，所以如果要增減就必須調整 analyser.getByteFrequencyData(array) 的 array 值

—

RICOH THETA 網頁全景處理

Posted on 2016-05-13 by hoyo

參考

—

360 Degree Interactive Panoramas And Virtual Tours In Html 5 – Multiple Browsers / 360 Easy – Complete Tutorial On 360 Degree Photography

<head>
    <script type="text/javascript" src="utilities.js"></script>

    <style type="text/css" media="screen">
        * { outline : none; -moz-outline : none -moz-mac-focusring; }
        #source-img	  { position: absolute; left: -999em; }
        canvas        	{ position: absolute; float:center; top: -90px; }
        #screen	        	{ position: absolute; float:center; top: 0px; }
        #screen div     { position: absolute; top: 0px; left: 300px; width: 630px; height: 815px;
            background: #fffff; }
        div#screen-overlay { position: absolute; top: 0px; left: 0px; margin-left: 0px; height: 715px;
            width: 630px; }
    </style>

    <script type="text/javascript">
        var YD = YAHOO.util.Dom,
                YE = YAHOO.util.Event;
        var canvas, ctx, img, widthSlider, scalingSlider, pw = 630, sf = .490, imgOffset = 0,
                stage, stagePos, stageDim, moveInterval, moveDirection, dist = 1, data = []; function init() {
            canvas = YD.get('cv');
            ctx = canvas.getContext('2d');
            canvas.width = 630;
            canvas.height = 815;
            canvas.style.width = '630px';
            canvas.style.height = '815px';
            stage = YD.get('screen-overlay');
            YE.on(stage, 'mousedown', startMoveBackground);
            YE.on(stage, 'mousemove', moveBackground);
            YE.on(stage, 'mouseout', stopMove);
            YE.on(stage, 'mouseup', stopMoveBackground);
            stagePos = YD.getXY(stage);
            stageDim = [ YD.getStyle(stage, 'width'), YD.getStyle(stage, 'height') ];
            img = YD.get('source-img');
            redraw(); }
        function startMoveBackground(e) {}
        function moveBackground(e) {
            dist = Math.abs(e.clientX - (parseInt(stageDim[0], 10) / 2 + stagePos[0])) / 3; var timeInt = 1;
            if(e.clientX - stagePos[0] > parseInt(stageDim[0], 10) / 2) {
                if(moveDirection === 'left' || !moveDirection) {
                    clearInterval(moveInterval);
                    moveInterval = setInterval(function() { moveRight(); }, timeInt); moveDirection = 'right'; }}
            else
            { if(moveDirection === 'right' || !moveDirection) {
                clearInterval(moveInterval);
                moveInterval = setInterval(function() { moveLeft(); }, timeInt);
                moveDirection = 'left'; }}}
        function stopMove() {
            clearInterval(moveInterval);
            moveDirection = null; }
        function moveRight() {
            imgOffset += dist;
            redraw(); }
        function moveLeft() {
            imgOffset -= dist;
            redraw(); }
        function stopMoveBackground(e) {}
        function precalculate(img, x, y, pixelWidth, scalingFactor, offset) {
            if(typeof offset === 'undefined') offset = 0;
            var h = img.height,
                    w = (img.width - 2) / 2.5;
            var polarity = (pixelWidth > 0) ? 1 : -1;
            var widthFactor = Math.abs(pixelWidth) / w;
            var delta = Math.abs(pixelWidth);
            var dHeight, dWidth, dy, dx;
            var constant = Math.pow(100000, scalingFactor); //380;
            var firstInc = ((delta / 2) * (delta / 2)) / constant;
            for(var n = 0, len = delta, inc = w / delta, incScale = (1 - scalingFactor) / delta; n < len; n++) {
                (function(m) {
                    sx = function(offset) { return ((inc * m + offset) >= 0) ? (inc * m + offset) % img.width : img.width +
                    ((inc * m + offset) % img.width) };})(n);
                sy = 0;
                sWidth = inc;
                sHeight = h;
                firstHalf = h + 100 - firstInc + (((len / 2) - n) * ((len / 2) - n)) / constant;
                secondHalf = h + 100 - firstInc + ((n - (len / 2)) * (n - (len / 2))) / constant;
                dHeight = (n < len / 2) ? firstHalf : secondHalf;
                dWidth = inc * widthFactor;
                dy = y + (h - dHeight) / 2;
                dx = x + (inc * n * widthFactor * polarity);
                data.push({
                    sx: sx,
                    sy: sy,
                    sWidth: sWidth,
                    sHeight: sHeight,
                    dx: dx,
                    dy: dy,
                    dWidth: dWidth,
                    dHeight: dHeight }); } }
        function redraw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            displayImage(ctx, img, 0, 140, pw, sf, imgOffset); }
        function displayImage(ctx, img, x, y, pixelWidth, scalingFactor, offset) {
            if(data.length === 0) {
                precalculate(img, x, y, pixelWidth, scalingFactor, offset); }
            var slice, sx;
            for(var n = 0, len = data.length; n < len; n++) {
                slice = data[n];
                ctx.drawImage(img, slice.sx(offset), slice.sy, slice.sWidth, slice.sHeight,
                        slice.dx, slice.dy, slice.dWidth, slice.dHeight); }}
        YAHOO.util.Event.on(window, 'load', init);
    </script>
</head>

<body>
<canvas id="cv"></canvas>
<img src="panorama.jpg" id="source-img" />
<div id="screen-overlay"></div>
</body>

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<head>

* { outline : none; -moz-outline : none -moz-mac-focusring; }

#source-img { position: absolute; left: -999em; }

canvas { position: absolute; float:center; top: -90px; }

#screen { position: absolute; float:center; top: 0px; }

#screen div { position: absolute; top: 0px; left: 300px; width: 630px; height: 815px;

background: #fffff; }

div#screen-overlay { position: absolute; top: 0px; left: 0px; margin-left: 0px; height: 715px;

width: 630px; }

</style>

var YD = YAHOO.util.Dom,

YE = YAHOO.util.Event;

var canvas, ctx, img, widthSlider, scalingSlider, pw = 630, sf = .490, imgOffset = 0,

stage, stagePos, stageDim, moveInterval, moveDirection, dist = 1, data = []; function init() {

canvas = YD.get('cv');

ctx = canvas.getContext('2d');

canvas.width = 630;

canvas.height = 815;

canvas.style.width = '630px';

canvas.style.height = '815px';

stage = YD.get('screen-overlay');

YE.on(stage, 'mousedown', startMoveBackground);

YE.on(stage, 'mousemove', moveBackground);

YE.on(stage, 'mouseout', stopMove);

YE.on(stage, 'mouseup', stopMoveBackground);

stagePos = YD.getXY(stage);

stageDim = [ YD.getStyle(stage, 'width'), YD.getStyle(stage, 'height') ];

img = YD.get('source-img');

redraw(); }

function startMoveBackground(e) {}

function moveBackground(e) {

dist = Math.abs(e.clientX - (parseInt(stageDim[0], 10) / 2 + stagePos[0])) / 3; var timeInt = 1;

if(e.clientX - stagePos[0] > parseInt(stageDim[0], 10) / 2) {

if(moveDirection === 'left' || !moveDirection) {

clearInterval(moveInterval);

moveInterval = setInterval(function() { moveRight(); }, timeInt); moveDirection = 'right'; }}

else

{ if(moveDirection === 'right' || !moveDirection) {

clearInterval(moveInterval);

moveInterval = setInterval(function() { moveLeft(); }, timeInt);

moveDirection = 'left'; }}}

function stopMove() {

clearInterval(moveInterval);

moveDirection = null; }

function moveRight() {

imgOffset += dist;

redraw(); }

function moveLeft() {

imgOffset -= dist;

redraw(); }

function stopMoveBackground(e) {}

function precalculate(img, x, y, pixelWidth, scalingFactor, offset) {

if(typeof offset === 'undefined') offset = 0;

var h = img.height,

w = (img.width - 2) / 2.5;

var polarity = (pixelWidth > 0) ? 1 : -1;

var widthFactor = Math.abs(pixelWidth) / w;

var delta = Math.abs(pixelWidth);

var dHeight, dWidth, dy, dx;

var constant = Math.pow(100000, scalingFactor); //380;

var firstInc = ((delta / 2) * (delta / 2)) / constant;

for(var n = 0, len = delta, inc = w / delta, incScale = (1 - scalingFactor) / delta; n < len; n++) {

(function(m) {

sx = function(offset) { return ((inc * m + offset) >= 0) ? (inc * m + offset) % img.width : img.width +

((inc * m + offset) % img.width) };})(n);

sy = 0;

sWidth = inc;

sHeight = h;

firstHalf = h + 100 - firstInc + (((len / 2) - n) * ((len / 2) - n)) / constant;

secondHalf = h + 100 - firstInc + ((n - (len / 2)) * (n - (len / 2))) / constant;

dHeight = (n < len / 2) ? firstHalf : secondHalf;

dWidth = inc * widthFactor;

dy = y + (h - dHeight) / 2;

dx = x + (inc * n * widthFactor * polarity);

data.push({

sx: sx,

sy: sy,

sWidth: sWidth,

sHeight: sHeight,

dx: dx,

dy: dy,

dWidth: dWidth,

dHeight: dHeight }); } }

function redraw() {

ctx.clearRect(0, 0, canvas.width, canvas.height);

displayImage(ctx, img, 0, 140, pw, sf, imgOffset); }

function displayImage(ctx, img, x, y, pixelWidth, scalingFactor, offset) {

if(data.length === 0) {

precalculate(img, x, y, pixelWidth, scalingFactor, offset); }

var slice, sx;

for(var n = 0, len = data.length; n < len; n++) {

slice = data[n];

ctx.drawImage(img, slice.sx(offset), slice.sy, slice.sWidth, slice.sHeight,

slice.dx, slice.dy, slice.dWidth, slice.dHeight); }}

YAHOO.util.Event.on(window, 'load', init);

</script>

</head>

<body>

</body>

—

720全景图

<!DOCTYPE html>
<html lang="en">
<head>
    <title>全景演示</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <style>
        body {
            background-color: #000000;
            margin: 0px;
            overflow: hidden;
        }

        #info {
            position: absolute;
            top: 0px; width: 100%;
            color: #ffffff;
            padding: 5px;
            font-family:Monospace;
            font-size:13px;
            font-weight: bold;
            text-align:center;
        }

        a {
            color: #ffffff;
        }
    </style>

</head>
<body>

<div id="container"></div>
<div id="info">单张图片全景.</div>

<script type="text/javascript" src="http://sandbox.runjs.cn/uploads/rs/340/p1qwizuy/three.min.js"></script>

<script>
    var camera, scene, renderer;
    var fov = 70,
            texture_placeholder,
            isUserInteracting = false,
            onMouseDownMouseX = 0, onMouseDownMouseY = 0,
            lon = 0, onMouseDownLon = 0,
            lat = 0, onMouseDownLat = 0,
            phi = 0, theta = 0;

    init();
    animate();

    function init() {
        var container, mesh;
        container = document.getElementById( 'container' );
        camera = new THREE.PerspectiveCamera( fov, window.innerWidth / window.innerHeight, 1, 1100 );
        camera.target = new THREE.Vector3( 0, 0, 0 );
        scene = new THREE.Scene();

        mesh = new THREE.Mesh( new THREE.SphereGeometry( 500, 60, 40 ), new THREE.MeshBasicMaterial( { map: THREE.ImageUtils.loadTexture( 'http://sandbox.runjs.cn/uploads/rs/232/bpgpj5uv/123.jpg' ) } ) );
        mesh.scale.x = -1;
        scene.add( mesh );

        renderer = new THREE.WebGLRenderer();
        renderer.setSize( window.innerWidth, window.innerHeight );

        container.appendChild( renderer.domElement );

        document.addEventListener( 'mousedown', onDocumentMouseDown, false );
        document.addEventListener( 'mousemove', onDocumentMouseMove, false );
        document.addEventListener( 'mouseup', onDocumentMouseUp, false );
        document.addEventListener( 'mousewheel', onDocumentMouseWheel, false );
        document.addEventListener( 'DOMMouseScroll', onDocumentMouseWheel, false);
        //
        window.addEventListener( 'resize', onWindowResize, false );
    }

    function onWindowResize() {
        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();
        renderer.setSize( window.innerWidth, window.innerHeight );
    }

    function onDocumentMouseDown( event ) {
        event.preventDefault();
        isUserInteracting = true;
        onPointerDownPointerX = event.clientX;
        onPointerDownPointerY = event.clientY;
        onPointerDownLon = lon;
        onPointerDownLat = lat;
    }

    function onDocumentMouseMove( event ) {
        if ( isUserInteracting ) {
            lon = ( onPointerDownPointerX - event.clientX ) * 0.1 + onPointerDownLon;
            lat = ( event.clientY - onPointerDownPointerY ) * 0.1 + onPointerDownLat;
        }
    }

    function onDocumentMouseUp( event ) {
        isUserInteracting = false;
    }

    function onDocumentMouseWheel( event ) {
        // WebKit
        if ( event.wheelDeltaY ) {
            fov -= event.wheelDeltaY * 0.05;
            // Opera / Explorer 9

        } else if ( event.wheelDelta ) {
            fov -= event.wheelDelta * 0.05;
            // Firefox

        } else if ( event.detail ) {
            fov += event.detail * 1.0;
        }

        camera.projectionMatrix.makePerspective( fov, window.innerWidth / window.innerHeight, 1, 1100 );
        render();
    }

    function animate() {
        requestAnimationFrame( animate );
        render();
    }

    function render() {
        lat = Math.max( - 85, Math.min( 85, lat ) );
        phi = THREE.Math.degToRad( 90 - lat );
        theta = THREE.Math.degToRad( lon );

        camera.target.x = 500 * Math.sin( phi ) * Math.cos( theta );
        camera.target.y = 500 * Math.cos( phi );
        camera.target.z = 500 * Math.sin( phi ) * Math.sin( theta );

        camera.lookAt( camera.target );

        /*
         // distortion
         camera.position.x = - camera.target.x;
         camera.position.y = - camera.target.y;
         camera.position.z = - camera.target.z;
         */

        renderer.render( scene, camera );
    }
</script>
</body>
</html>

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<!DOCTYPE html>

<head>

<style>

body {

background-color: #000000;

margin: 0px;

overflow: hidden;

}

#info {

position: absolute;

top: 0px; width: 100%;

color: #ffffff;

padding: 5px;

font-family:Monospace;

font-size:13px;

font-weight: bold;

text-align:center;

}

a {

color: #ffffff;

}

</style>

</head>

<body>

<div id="info">单张图片全景.</div>

var camera, scene, renderer;

var fov = 70,

texture_placeholder,

isUserInteracting = false,

onMouseDownMouseX = 0, onMouseDownMouseY = 0,

lon = 0, onMouseDownLon = 0,

lat = 0, onMouseDownLat = 0,

phi = 0, theta = 0;

init();

animate();

function init() {

var container, mesh;

container = document.getElementById( 'container' );

camera = new THREE.PerspectiveCamera( fov, window.innerWidth / window.innerHeight, 1, 1100 );

camera.target = new THREE.Vector3( 0, 0, 0 );

scene = new THREE.Scene();

mesh = new THREE.Mesh( new THREE.SphereGeometry( 500, 60, 40 ), new THREE.MeshBasicMaterial( { map: THREE.ImageUtils.loadTexture( 'http://sandbox.runjs.cn/uploads/rs/232/bpgpj5uv/123.jpg' ) } ) );

mesh.scale.x = -1;

scene.add( mesh );

renderer = new THREE.WebGLRenderer();

renderer.setSize( window.innerWidth, window.innerHeight );

container.appendChild( renderer.domElement );

document.addEventListener( 'mousedown', onDocumentMouseDown, false );

document.addEventListener( 'mousemove', onDocumentMouseMove, false );

document.addEventListener( 'mouseup', onDocumentMouseUp, false );

document.addEventListener( 'mousewheel', onDocumentMouseWheel, false );

document.addEventListener( 'DOMMouseScroll', onDocumentMouseWheel, false);

window.addEventListener( 'resize', onWindowResize, false );

}

function onWindowResize() {

camera.aspect = window.innerWidth / window.innerHeight;

camera.updateProjectionMatrix();

renderer.setSize( window.innerWidth, window.innerHeight );

}

function onDocumentMouseDown( event ) {

event.preventDefault();

isUserInteracting = true;

onPointerDownPointerX = event.clientX;

onPointerDownPointerY = event.clientY;

onPointerDownLon = lon;

onPointerDownLat = lat;

}

function onDocumentMouseMove( event ) {

if ( isUserInteracting ) {

lon = ( onPointerDownPointerX - event.clientX ) * 0.1 + onPointerDownLon;

lat = ( event.clientY - onPointerDownPointerY ) * 0.1 + onPointerDownLat;

}

function onDocumentMouseUp( event ) {

isUserInteracting = false;

}

function onDocumentMouseWheel( event ) {

// WebKit

if ( event.wheelDeltaY ) {

fov -= event.wheelDeltaY * 0.05;

// Opera / Explorer 9

} else if ( event.wheelDelta ) {

fov -= event.wheelDelta * 0.05;

// Firefox

} else if ( event.detail ) {

fov += event.detail * 1.0;

}

camera.projectionMatrix.makePerspective( fov, window.innerWidth / window.innerHeight, 1, 1100 );

render();

}

function animate() {

requestAnimationFrame( animate );

render();

}

function render() {

lat = Math.max( - 85, Math.min( 85, lat ) );

phi = THREE.Math.degToRad( 90 - lat );

theta = THREE.Math.degToRad( lon );

camera.target.x = 500 * Math.sin( phi ) * Math.cos( theta );

camera.target.y = 500 * Math.cos( phi );

camera.target.z = 500 * Math.sin( phi ) * Math.sin( theta );

camera.lookAt( camera.target );

// distortion

camera.position.x = - camera.target.x;

camera.position.y = - camera.target.y;

camera.position.z = - camera.target.z;

renderer.render( scene, camera );

}

</script>

</body>

</html>

—

jQuery Templates – jQuery Templates plugin

Posted on 2016-04-13 by hoyo

jQuery 的模板

jquery-tmpl
jQuery .tmpl(), .template()学习资料小结(http://coolong124220.nidbox.com/diary/read/8045452)
10 JavaScript and jQuery Templates Engines
An Introduction to jQuery Templates
自幹

<!-- jQuery template -->
<script src="/Component_Front/jquery-tmpl-master/jquery.tmpl.min.js"></script>
    
<!-- 資料顯示的地方 -->
<table cellspacing="0" cellpadding="3" border="1">
    <tbody id="rows"></tbody>
</table>

<!-- 模板 -->
<table style="display: none;">
    <tbody id="myTemplate">
    <tr>
        <td>${ID}</td>
        <td>${Name}</td>
    </tr>
    </tbody>
</table>

<script>
    var users = [{ ID: 'think8848', Name: 'Joseph Chan' }, { ID: 'aCloud', Name: 'Mary Cheung'}];
    $('#myTemplate').tmpl(users).appendTo('#rows');
</script>

</table>

<tr>

</tr>

</tbody>

</table>

var users = [{ ID: 'think8848', Name: 'Joseph Chan' }, { ID: 'aCloud', Name: 'Mary Cheung'}];

$('#myTemplate').tmpl(users).appendTo('#rows');

</script>

為什麼這麼改？

使用官方預設的 <script id=”” type=”text/x-jquery-tmpl”></script> 寫法，PhpStorm 無法解析語法，無法解析語法就代表程式有可能會犯錯

非用 script 不可

<script id="myTemplate" type="text/template">
    {{if ID=='aCloud'}}
    <tr>
        <td>${ID}</td>
        <td>${Name}</td>
    </tr>
    {{/if}}
</script>

<tr>

</tr>

</script>

如果模板內必須使用到其他功能，那還是必須使用 script tag 才行，調整一下就可以正常執行 jQuery Templates 以及相容 PhpStorm

—

加上 index

http://jsfiddle.net/XCThu/26/

<script id="myTemplate" type="text/template">
    {{each Content}}
    <tr>
        <td>${index} ${id}</td>
        <td>${Create_Time}</td>
    </tr>
    {{/each}}
</script>

<script>
    $.post("./?a=<{$smarty.get.a}>&b=Search", {P:P, Pn:$Pn, Search:Search, SearchTrash:SearchTrash}, function(Json) {
        if (R.Result==true) {
            $('#myTemplate').tmpl(Json).appendTo('#Main').find('tbody');
        }
    }, 'json');
</script>

<tr>

<td>${index} ${id}</td>

<td>${Create_Time}</td>

</tr>

</script>

$.post("./?a=<{$smarty.get.a}>&b=Search", {P:P, Pn:$Pn, Search:Search, SearchTrash:SearchTrash}, function(Json) {

if (R.Result==true) {

$('#myTemplate').tmpl(Json).appendTo('#Main').find('tbody');

}

}, 'json');

</script>

—

ajax + Json + jQuery Template 應用

<table id="Main" class="table">
    <thead>
    <tr>
        <td>#</td>
        <td>時間</td>
        <td>廠商簡稱</td>
        <td>Email</td>
        <td>聯絡電話</td>
        <td>消費金額</td>
        <td>紅利</td>
        <td><label>審核 <input type="checkbox" id="checkAll" onchange="Select_is_Verify(this)" style="width:16px;height:16px" /></label></td>
        <td>%</td>
    </tr>
    </thead>
    <tbody><!--  --></tbody>
</table>

<!--  -->
<script id="myTemplate" type="text/template">
    {{each Content}}
    {{if $index%2==0}}
    <tr bgcolor="f0f0f0">
        {{else}}
    <tr bgcolor="ffffff">
        {{/if}}
        
        <td>${id}</td>
        <td>${Create_Time}</td>
        <td>${ShortName}</td>
        <td>${Email}</td>
        <td>${Phone}</td>
        <td>${Spend}</td>
        <td>${Points}</td>

        <td align="center">
            {{if is_Verify=='Y'}}
            V
            {{/if}}

            {{if is_Verify=='N' && is_ConfirmEmail=='Y'}}
            <input type="checkbox" name="is_Verify[]" class="is_Verify" value="${id}" style="width:24px; height:24px;"/>
            {{/if}}
        </td>

        <td><i data-id="${id}" class="btn btn-default btn-xs fa fa-edit"></i> <i data-id="${id}" class="btn btn-default btn-xs fa fa-trash"></i></td>
    </tr>
    {{/each}}
</script>

<script>
    $.post("./?a=<{$smarty.get.a}>&b=Search", {P:P, Pn:$Pn, Search:Search, SearchTrash:SearchTrash}, function(Json) {
        if (Json.Result==true) {
            var $TotalCount = Json.TotalCount;

            $("#Main").find("tbody").html('');

            // 顯示 Json 資料
            $('#myTemplate').tmpl(Json).appendTo('#Main').find('tbody');
        }
    }, 'json');
</script>

<thead>

<tr>

<td>Email</td>

</tr>

</thead>

</table>

<td>${Create_Time}</td>

<td>${ShortName}</td>

<td>${Email}</td>

<td>${Phone}</td>

<td>${Spend}</td>

<td>${Points}</td>

</td>

</tr>

</script>

$.post("./?a=<{$smarty.get.a}>&b=Search", {P:P, Pn:$Pn, Search:Search, SearchTrash:SearchTrash}, function(Json) {

if (Json.Result==true) {

var $TotalCount = Json.TotalCount;

$("#Main").find("tbody").html('');

// 顯示 Json 資料

$('#myTemplate').tmpl(Json).appendTo('#Main').find('tbody');

}

}, 'json');

</script>

—

使用 String() 自幹模板

其實模板講白就是一個預先設計好的結構，使用流程大概是這樣

設計模板架構
取用
替換變動資料

設計模板架構

<div id="Template_HTML" style="display: none;">
    <div class="LandCSS">

        <div class="form-group">
            <label class="col-sm-2 control-label">地號</label>
            <div class="col-sm-10">
                <input type="text" id="Update_" name="LandCode[]" value="{LandCode}" class="form-control"/>
            </div>
        </div>

        <div class="form-group">
            <div class="col-sm-2 control-label">地理位置</div>
            <div class="col-sm-10">
                <label >距離 <input type="text" name="G_From" class="inLineStyle" style="width: 200px;" /></label> <label>約 <input type="number" name="G_MinuteDrive" class="inLineStyle" style="width: 60px;" /> 分鐘車程</label>
            </div>
        </div>

    </div>
</div>

</div>

</div>

取用

var $Template = $('#Template_HTML').html();

1	var $Template = $('#Template_HTML').html();

替換變動資料

搜尋 {LandCode} 字串，替代成實際從 Json 取得資料

$.each(DataLand, function (LK, LP) {
    var aa = $Template.replace(/\{LandCode\}/i, LP[0]);
    $HTML += aa;
});

$.each(DataLand, function (LK, LP) {

var aa = $Template.replace(/\{LandCode\}/i, LP[0]);

$HTML += aa;

});

—

hoyo 學習紀錄

PHP 網頁應用 IOT 物聯網自動化

Category Archives: 網頁前端

jQuery DOM Insertion, Inside & Outside

如何控制插入內容相對於對象的位置

網頁或網頁內元素是否作用中 (可視)

元素出現就作用

元素完整出現才作用

Canvas framework

hoyo 自己的應用

Web Audio API – 使用

參考

實作

RICOH THETA 網頁全景處理

jQuery Templates – jQuery Templates plugin

jQuery 的模板

ajax + Json + jQuery Template 應用

使用 String() 自幹模板