Adjusting transparency upon hovering

Question

Adjusting transparency upon hovering

My main project goal is to add interactivity to my circle chart image by changing the opacity of different sections upon mouseover. I have tried multiple methods, but still need help achieving this effect:

One attempt involved image mapping the chart with each section as a separate map area, however, I couldn't figure out how to adjust the opacity of specific areas within one image using CSS.
Another approach I took was cutting the chart into individual pieces, adjusting their opacity to 0.5 and saving them separately. Then, I mapped the original image and attempted to load the separate pieces on hover using CSS.
For my final try, I saved each section of the chart as its own image and successfully changed opacity to 0.5 on hover using CSS. The only issue now is positioning these pieces in Dreamweaver to form a perfect circle.

Any guidance or advice would be greatly appreciated. I am open to learning JavaScript or jQuery to help accomplish this task.

Thank you

EDIT I have attached an image of the chart for reference:

https://i.sstatic.net/KwIfY.jpg

javascript jquery html css

Answer 1

Answer №1

Regarding the current answers, I wanted to provide two approaches for making the parts of the chart interactive:

One approach is to use pure CSS by dividing the chart into individual images and positioning them using absolute positioning. This can be achieved by cutting each part of the chart individually and placing them in the right position.
Another approach, as mentioned before, is to use map areas to define the parts of the chart. By utilizing a plugin like ImageMapster (https://github.com/jamietre/ImageMapster), you can create the desired interactivity. This was successfully implemented in a previous project with a map at http://blackbeats.fm/events/. When hovering over any part of the map, its background will change. Similarly, in your case, you could display the chart with full opacity and have it switch to an image with 50% opacity upon hover.

You can view a demo at http://jsfiddle.net/4t2GU/ to see how this would work.

Please note that the demo may not be perfectly positioned, but it demonstrates the functionality.

transform: rotate(45deg);

Answer 2

Regarding the current answers, I wanted to provide two approaches for making the parts of the chart interactive:

One approach is to use pure CSS by dividing the chart into individual images and positioning them using absolute positioning. This can be achieved by cutting each part of the chart individually and placing them in the right position.
Another approach, as mentioned before, is to use map areas to define the parts of the chart. By utilizing a plugin like ImageMapster (https://github.com/jamietre/ImageMapster), you can create the desired interactivity. This was successfully implemented in a previous project with a map at http://blackbeats.fm/events/. When hovering over any part of the map, its background will change. Similarly, in your case, you could display the chart with full opacity and have it switch to an image with 50% opacity upon hover.

You can view a demo at http://jsfiddle.net/4t2GU/ to see how this would work.

Please note that the demo may not be perfectly positioned, but it demonstrates the functionality.

transform: rotate(45deg);

Answer 3

Answer №2

If you're wondering about whether CSS3 transitions are the right choice for your project, you can find more information here: http://www.w3schools.com/css/css3_transitions.asp

.chart-item { opacity: 0.5; transition:opacity 2s; }
.chart-item:hover { opacity: 1; }

Don't forget to check out the documentation to see which browsers support these transitions.

Answer 4

If you're wondering about whether CSS3 transitions are the right choice for your project, you can find more information here: http://www.w3schools.com/css/css3_transitions.asp

.chart-item { opacity: 0.5; transition:opacity 2s; }
.chart-item:hover { opacity: 1; }

Don't forget to check out the documentation to see which browsers support these transitions.

Answer 5

Answer №3

One idea is to create a separate div for each image and set it as the background or content of that div. Then, you can use jQuery to add a listener to the div class that changes the opacity when hovering over or leaving the div.

For example:

jQuery:

$( ".somedivclass" )
  .mouseenter(function() {
    $(this).fadeTo(200, 0.5);
  })
  .mouseleave(function() {
    $(this).fadeTo(200, 1);
  });

Here's more information on $.mouseenter(). Here's some for $.fadeTo().

Answer 6

One idea is to create a separate div for each image and set it as the background or content of that div. Then, you can use jQuery to add a listener to the div class that changes the opacity when hovering over or leaving the div.

For example:

jQuery:

$( ".somedivclass" )
  .mouseenter(function() {
    $(this).fadeTo(200, 0.5);
  })
  .mouseleave(function() {
    $(this).fadeTo(200, 1);
  });

Here's more information on $.mouseenter(). Here's some for $.fadeTo().

Answer 7

Answer №4

Experience this interactive demonstration by hovering your cursor directly over the owl's eyes to witness a fascinating opacity effect. The magic happens only when you focus on the eyes!

http://jsfiddle.net/q6d57/14/

$('.eye1').on('mouseenter mouseleave', function(e) {
    $('.box2').stop(true, false).fadeToggle(1500)
});

Answer 8

Experience this interactive demonstration by hovering your cursor directly over the owl's eyes to witness a fascinating opacity effect. The magic happens only when you focus on the eyes!

http://jsfiddle.net/q6d57/14/

$('.eye1').on('mouseenter mouseleave', function(e) {
    $('.box2').stop(true, false).fadeToggle(1500)
});

Answer 9

Answer №5

If you're looking to create a dynamic chart, I recommend using SVG. Check out this example that showcases the same functionality in action. I decided to explore d3.js today and came up with this demo:

http://jsfiddle.net/6m26k/1/

No need to write complex code to generate the chart - simply embed the SVG on your HTML page and apply CSS styles like the ones below:

.arc.filled:hover {
   opacity: .8;
   cursor: pointer;
}

Answer 10

If you're looking to create a dynamic chart, I recommend using SVG. Check out this example that showcases the same functionality in action. I decided to explore d3.js today and came up with this demo:

http://jsfiddle.net/6m26k/1/

No need to write complex code to generate the chart - simply embed the SVG on your HTML page and apply CSS styles like the ones below:

.arc.filled:hover {
   opacity: .8;
   cursor: pointer;
}

Adjusting transparency upon hovering

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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