Re: [I] [Feature] visualMap-piecewise + splitnumber should support gradient color [echarts]

Sun, 10 Aug 2025 21:14:26 -0700 


Justin-ZS commented on issue #20608:
URL: https://github.com/apache/echarts/issues/20608#issuecomment-3173221593

   > how does splitNumber should use the gradient? something like this?
   > 
   > splitNumber: 4, dimension: 0, min: 0, max: 4, inRange: {color: [['red', 
'blue'], 'blue', 'green', ['green', 'yellow']]
   > 
   > should look like this?
   > 
   > <img alt="Image" width="860" height="540" 
src="https://private-user-images.githubusercontent.com/140714367/475721706-f9e1e8b6-525b-468e-a44e-594bc5b25da6.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NTQ4ODUxNjQsIm5iZiI6MTc1NDg4NDg2NCwicGF0aCI6Ii8xNDA3MTQzNjcvNDc1NzIxNzA2LWY5ZTFlOGI2LTUyNWItNDY4ZS1hNDRlLTU5NGJjNWIyNWRhNi5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwODExJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDgxMVQwNDAxMDRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT0wMDYxMDA4MjJkYTZjOWIwZmQyY2UyYmExNmUyZGUyZmJjNjRmNWJlYjNiZjE2YmVmZWUyODJlYzg0OWQzNTBmJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.jhqN8oi7WaVvvwqH6iWmEQa2xF8XVZTFiurPbxYFJUY";>
   
   My usage is set gradient color for `bar`.
   ```
   {
       "splitNumber": 3,
       "min": 147518,
       "max": 2948082,
       "inRange": {
           "color": [
               {
                   "colorStops": [
                       {
                           "offset": 0,
                           "color": "rgba(161, 188, 231, 0.3)"
                       },
                       {
                           "offset": 1,
                           "color": "rgba(161, 188, 231, 1)"
                       }
                   ],
                   "x": 0,
                   "y": 0,
                   "x2": 1,
                   "y2": 0,
                   "type": "linear",
                   "global": false
               },
               {
                   "colorStops": [
                       {
                           "offset": 0,
                           "color": "rgba(102, 146, 215, 0.3)"
                       },
                       {
                           "offset": 1,
                           "color": "rgba(102, 146, 215, 1)"
                       }
                   ],
                   "x": 0,
                   "y": 0,
                   "x2": 1,
                   "y2": 0,
                   "type": "linear",
                   "global": false
               },
               {
                   "colorStops": [
                       {
                           "offset": 0,
                           "color": "rgba(67, 121, 206, 0.3)"
                       },
                       {
                           "offset": 1,
                           "color": "rgba(67, 121, 206, 1)"
                       }
                   ],
                   "x": 0,
                   "y": 0,
                   "x2": 1,
                   "y2": 0,
                   "type": "linear",
                   "global": false
               }
           ]
       }
   
   }
   ```
   Since `splitNumber` is equal to the number of colors, the actual color 
should be exactly one of the gradient colors.


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