Interactive Radial Menu Using Raphael JS

Question

Interactive Radial Menu Using Raphael JS

Greetings and thank you for taking the time to consider my predicament. I am currently working on creating an SVG menu using raphael, but unfortunately, geometry has never been my strong suit.

Below is a visual representation of what I have managed to create so far. While I have successfully implemented the blue center part using CSS, I am struggling to find a suitable solution for the white outer part. Traditional methods like images and CSS do not seem to work due to the block nature of these elements. Ideally, I would like to generate a series of arcs that can adjust in size based on the number of elements.

Do you have any recommendations on how I can create a series of clickable arcs forming a quarter circle with hover effects? Additionally, I will need to place icons on these arcs as well. Any guidance on accomplishing this task would be greatly appreciated.

I have come across some examples utilizing pie charts in raphael, but I am struggling to adapt them to fit my needs. If only I had paid more attention in geometry class...

Once again, thank you for your assistance and expertise.

jquery html css navigation raphael

Answer 1

Answer №1

The structure isn't too complex, it's definitely not as frustrating as dealing with the elliptical arc path syntax in SVG. Both are manageable.

Check out this function that creates a series of arc segments as paths and passes each one (along with any additional data) to a callback function:

function createRadialNavigation( paper, cx, cy, innerRadius, thickness, items, callback, opts ) {
    opts = opts || {};
    
    var startAngle = opts.startAngle || 0;
    var endAngle = opts.endAngle || Math.PI / 2;
    var itemCount = Object.keys(items).length;
    var sliceAngle = (endAngle - startAngle) / itemCount;
    
    var index = 0;
    for (var key in items) {
        var path = [];
        path.push("M", cx + Math.cos(startAngle + sliceAngle * index) * innerRadius, cy + Math.sin(startAngle + sliceAngle * index) * innerRadius);
        path.push("L", cx + Math.cos(startAngle + sliceAngle * index) * (innerRadius + thickness), cy + Math.sin(startAngle + sliceAngle * index) * (innerRadius + thickness));
        path.push("A",
            innerRadius + thickness, innerRadius + thickness,
            sliceAngle, 0, 1,
            cx + Math.cos(startAngle + sliceAngle * (index + 1)) * (innerRadius + thickness), cy + Math.sin(startAngle + sliceAngle * (index + 1)) * (innerRadius + thickness));
        path.push("L", cx + Math.cos(startAngle + sliceAngle * (index + 1)) * innerRadius, cy + Math.sin(startAngle + sliceAngle * (index + 1)) * innerRadius);
        path.push("A",
            innerRadius, innerRadius,
            sliceAngle, 0, 0,
            cx + Math.cos(startAngle + sliceAngle * index) * innerRadius, cy + Math.sin(startAngle + sliceAngle * index) * innerRadius);
        path.push("Z");

        var element = paper.path(path).attr({ fill: 'none', stroke: 'none' });
        callback(key, element, items[key]);

        index++;
    }
}

This function calculates the area for each menu item, creates a corresponding path, and then executes a callback function with the menu details. Adding support for icons can be done separately by enhancing the menu_items data. For a demo of this approach, visit my test page -- please excuse any imperfections due to rushing!

Answer 2

The structure isn't too complex, it's definitely not as frustrating as dealing with the elliptical arc path syntax in SVG. Both are manageable.

Check out this function that creates a series of arc segments as paths and passes each one (along with any additional data) to a callback function:

function createRadialNavigation( paper, cx, cy, innerRadius, thickness, items, callback, opts ) {
    opts = opts || {};
    
    var startAngle = opts.startAngle || 0;
    var endAngle = opts.endAngle || Math.PI / 2;
    var itemCount = Object.keys(items).length;
    var sliceAngle = (endAngle - startAngle) / itemCount;
    
    var index = 0;
    for (var key in items) {
        var path = [];
        path.push("M", cx + Math.cos(startAngle + sliceAngle * index) * innerRadius, cy + Math.sin(startAngle + sliceAngle * index) * innerRadius);
        path.push("L", cx + Math.cos(startAngle + sliceAngle * index) * (innerRadius + thickness), cy + Math.sin(startAngle + sliceAngle * index) * (innerRadius + thickness));
        path.push("A",
            innerRadius + thickness, innerRadius + thickness,
            sliceAngle, 0, 1,
            cx + Math.cos(startAngle + sliceAngle * (index + 1)) * (innerRadius + thickness), cy + Math.sin(startAngle + sliceAngle * (index + 1)) * (innerRadius + thickness));
        path.push("L", cx + Math.cos(startAngle + sliceAngle * (index + 1)) * innerRadius, cy + Math.sin(startAngle + sliceAngle * (index + 1)) * innerRadius);
        path.push("A",
            innerRadius, innerRadius,
            sliceAngle, 0, 0,
            cx + Math.cos(startAngle + sliceAngle * index) * innerRadius, cy + Math.sin(startAngle + sliceAngle * index) * innerRadius);
        path.push("Z");

        var element = paper.path(path).attr({ fill: 'none', stroke: 'none' });
        callback(key, element, items[key]);

        index++;
    }
}

This function calculates the area for each menu item, creates a corresponding path, and then executes a callback function with the menu details. Adding support for icons can be done separately by enhancing the menu_items data. For a demo of this approach, visit my test page -- please excuse any imperfections due to rushing!

Interactive Radial Menu Using Raphael JS

Answer №1

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