我正在使用 Cytoscape JS 制作网络查看器,为此我需要通过 JSON 对象提供样式。我基本上想要一个热图,所以我在 255 个类别中选择它们,每个类别都有自己的颜色。由于我不打算写 255 个条目,所以我想用循环来完成。然而,这种结合让我头疼,我真的不知道我在哪里愚蠢。
var create_stylesheet = function(){
var to_return =[
{
'selector': 'node', 'style': {'content': 'data(label)', 'background-color': 'BlueViolet'}
},
{
'selector': 'edge', 'style': {'label': 'data(score)'}
}]; // <- this entry is for basic node labels and stuff. It needs to be first.
//For loop that assigns a colour to each category.
//As the red RGB value goes up, the blue RGB goes down. creating a gradient from cold to warm.
// In the program warmer colours have a higher score.
for(i = 0; i <= 255; i++){
var cat = `.cat_${i}`;
var colour = `rgb(${i}, 0, ${255-i})`;
var to_append =
{
'selector': cat, 'style': {'line-color': colour}
};
//Here I'd like to add to_append to the to_return variable.
}
return to_return; //Return the finished stylesheet.
}
谢谢,非常感谢您的帮助。
编辑:感谢和我一起思考的人。我做错的是试图同时使用几种方法,这显然行不通。所以我慢慢地构建了一切,效率低下会让某些程序员不眠之夜,但这里是工作代码:
var create_stylesheet = function(){
let to_return = [];
let first_line =
{
'selector': 'node', 'style': {'content': 'data(label)', 'background-color': 'BlueViolet'}
};
let second_line =
{
'selector': 'edge', 'style': {'label': 'data(score)'}
};
let last_line = {
'selector': ':selected',
'style': {
'background-color': 'SteelBlue', 'line-color': 'black', 'target-arrow-color': 'black', 'source-arrow-color': 'black'}
};
//Push the first two line into the array.
to_return.push(first_line);
to_return.push(second_line);
for(let i = 0; i <= 255; i++){
var cat = `.cat_${i}`;
var colour = `rgb(${i}, 0, ${255-i})`;
var to_append =
{
'selector': cat, 'style': {'line-color': colour}
};
to_return.push(to_append); //Push each line into the array.
}
to_return.push(last_line); //add the last line.
return to_return;
}
有两点需要注意。
let i = 0
.var create_stylesheet = function(){
var to_return =[
{
'selector': 'node', 'style': {'content': 'data(label)', 'background-color': 'BlueViolet'}
},
{
'selector': 'edge', 'style': {'label': 'data(score)'}
}]; // <- this entry is for basic node labels and stuff. It needs to be first.
//For loop that assigns a colour to each category.
//As the red RGB value goes up, the blue RGB goes down. creating a gradient from cold to warm.
// In the program warmer colours have a higher score.
for(let i = 0; i <= 255; i++){
var cat = `.cat_${i}`;
var colour = `rgb(${i}, 0, ${255-i})`;
var to_append =
{
'selector': cat, 'style': {'line-color': colour}
};
to_return = to_return.concat(to_append);
}
return to_return;
}
create_stylesheet()
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