plotly.js/devtools/custom_marker_demo.html at c74c81d766c4e6516727f0aea8f2c006b6cfe91c · plotly/plotly.js · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Custom Marker Functions Demo</title>
    <script src="dist/plotly.js"></script>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 20px;
            background-color: #f5f5f5;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        h1 {
            color: #333;
            border-bottom: 2px solid #3b82f6;
            padding-bottom: 10px;
        }
        .plot {
            width: 100%;
            height: 500px;
            margin: 20px 0;
        }
        .code-block {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 4px;
            padding: 15px;
            margin: 15px 0;
            overflow-x: auto;
        }
        pre {
            margin: 0;
            font-family: 'Courier New', monospace;
            font-size: 14px;
        }
        .info {
            background-color: #e7f3ff;
            border-left: 4px solid #3b82f6;
            padding: 15px;
            margin: 15px 0;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Custom Marker Functions Demo</h1>

        <div class="info">
            <strong>New Feature:</strong> You can now pass custom functions directly as
            <code>marker.symbol</code> values to create custom marker shapes!
        </div>

        <h2>Example: Custom Marker Functions</h2>
        <div id="plot1" class="plot"></div>

        <h3>Code:</h3>
        <div class="code-block">
            <pre>// Define custom marker functions
function heartMarker(r) {
    var x = r * 0.6, y = r * 0.8;
    return 'M0,' + (-y/2) +
           'C' + (-x) + ',' + (-y) + ' ' + (-x*2) + ',' + (-y/3) + ' ' + (-x*2) + ',0' +
           'C' + (-x*2) + ',' + (y/2) + ' 0,' + (y) + ' 0,' + (y*1.5) +
           'C0,' + (y) + ' ' + (x*2) + ',' + (y/2) + ' ' + (x*2) + ',0' +
           'C' + (x*2) + ',' + (-y/3) + ' ' + (x) + ',' + (-y) + ' 0,' + (-y/2) + 'Z';
}

function star5Marker(r) {
    var points = 5, path = 'M';
    for (var i = 0; i < points * 2; i++) {
        var radius = i % 2 === 0 ? r : r * 0.4;
        var ang = (i * Math.PI) / points - Math.PI / 2;
        path += (i === 0 ? '' : 'L') +
                (radius * Math.cos(ang)).toFixed(2) + ',' +
                (radius * Math.sin(ang)).toFixed(2);
    }
    return path + 'Z';
}

// Use them directly in a plot
Plotly.newPlot('plot1', [{
    x: [1, 2, 3, 4, 5],
    y: [2, 3, 4, 3, 2],
    mode: 'markers+lines',
    marker: {
        symbol: [heartMarker, star5Marker, 'circle', star5Marker, heartMarker],
        size: 20,
        color: ['red', 'gold', 'blue', 'orange', 'crimson']
    }
}]);</pre>
        </div>
    </div>

    <script>
        // Define custom heart marker
        function heartMarker(r) {
            var x = r * 0.6;
            var y = r * 0.8;
            return 'M0,' + (-y/2) +
                   'C' + (-x) + ',' + (-y) + ' ' + (-x*2) + ',' + (-y/3) + ' ' + (-x*2) + ',0' +
                   'C' + (-x*2) + ',' + (y/2) + ' 0,' + (y) + ' 0,' + (y*1.5) +
                   'C0,' + (y) + ' ' + (x*2) + ',' + (y/2) + ' ' + (x*2) + ',0' +
                   'C' + (x*2) + ',' + (-y/3) + ' ' + (x) + ',' + (-y) + ' 0,' + (-y/2) + 'Z';
        }

        // Define custom 5-point star marker
        function star5Marker(r) {
            var points = 5;
            var outerRadius = r;
            var innerRadius = r * 0.4;
            var path = 'M';

            for (var i = 0; i < points * 2; i++) {
                var radius = i % 2 === 0 ? outerRadius : innerRadius;
                var ang = (i * Math.PI) / points - Math.PI / 2;
                var x = radius * Math.cos(ang);
                var y = radius * Math.sin(ang);
                path += (i === 0 ? '' : 'L') + x.toFixed(2) + ',' + y.toFixed(2);
            }
            path += 'Z';
            return path;
        }

        // Create the plot
        var trace = {
            x: [1, 2, 3, 4, 5],
            y: [2, 3, 4, 3, 2],
            mode: 'markers+lines',
            name: 'Custom Markers',
            marker: {
                symbol: [heartMarker, star5Marker, 'circle', star5Marker, heartMarker],
                size: 20,
                color: ['#e74c3c', '#f39c12', '#3498db', '#ff9800', '#c0392b'],
                line: {
                    color: '#34495e',
                    width: 2
                }
            },
            line: {
                color: '#95a5a6',
                width: 2,
                dash: 'dot'
            }
        };

        var layout = {
            title: 'Custom Marker Functions Demo',
            xaxis: {
                title: 'X Axis',
                gridcolor: '#ecf0f1'
            },
            yaxis: {
                title: 'Y Axis',
                gridcolor: '#ecf0f1'
            },
            plot_bgcolor: '#fafafa',
            showlegend: true
        };

        Plotly.newPlot('plot1', [trace], layout);
        console.log('Plot created successfully!');
    </script>
</body>
</html>