问题描述
尝试根据信号值更改标记的不透明度和填充:
"signals": [
{"name": "selectedDate","value": "2020-03-05"}
]
"marks": [
{
"name": "marks","type": "rect","style": ["tick"],"from": {"data": "data_0"},"encode": {
"update": {
"opacity": {
"condition": {"test": "datum['date'] === signal['test']","value": 1},"value": 0.7
},"fill": {
"condition": {"test": "datum['date'] === signal['selectedDate']","value": "#007CC0"},"value": "#4c78a8"
}
}
}
]
因此,当您在用户界面中选择有效日期时,这应该使标记突出显示。
解决方法
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