我有一个使用googlevis包的嵌入式谷歌折线图的闪亮应用程序。我需要能够在点击它的图例键时隐藏一条线。我在谷歌图表中找到了关于如何操作的代码:
$http://jsfiddle.net/xDUPF/4/light/$
如何将这种行为引入使用闪亮创建的图形?我可以使用“jscode”参数吗?
答案 0 :(得分:3)
您可以通过插入一些额外的JavaScript代码来实现此目的。该技术显示为here。当您致电gvisLineChart
并将其分配给x
时,它会返回一个列表。您可以检查以下
x$html$chart[['jsDrawChart']]
它将返回类似
的内容// jsDrawChart
function drawChartyourid() {
var data = gvisDatayourid();
var options = {};
options["allowHtml"] = true;
options["series"] = [{targetAxisIndex: 0},
{targetAxisIndex:1}];
options["vAxes"] = [{title:'val1'}, {title:'val2'}];
var chart = new google.visualization.LineChart(
document.getElementById('yourid')
);
chart.draw(data,options);
}
您可以调整此javascript代码以实现您的目标。这里有一个例子
一个ui.R
和server.R
。结果可以查看http://spark.rstudio.com/johnharrison/gvisTest
# ui.R
library(shiny)
shinyUI(pageWithSidebar(
headerPanel("Hello Shiny!"),
sidebarPanel("Sidebar"),
mainPanel("Main",
htmlOutput('gtest'))
)
)
# server.R
library(shiny)
library(googleVis)
shinyServer(function(input, output) {
output$gtest <- renderGvis({
df <- data.frame(country=c("US", "GB", "BR"), val1=c(1,3,4), val2=c(23,12,32))
gt <- gvisLineChart(df, xvar="country", yvar=c("val1", "val2"),
options=list(title="Hello World",
titleTextStyle="{color:'red',fontName:'Courier',fontSize:16}",
curveType='function'),chartid = "yourid"
)
jsInsert <- "var columns = [];
// display these data series by default
var defaultSeries = [1,2,3];
var series = {};
for (var i = 0; i < data.getNumberOfColumns(); i++) {
if (i == 0 || defaultSeries.indexOf(i) > -1) {
// if the column is the domain column or in the default list, display the series
columns.push(i);
} else {
// otherwise, hide it
columns[i] = {
label: data.getColumnLabel(i),
type: data.getColumnType(i),
calc: function () {
return null;
}
};
}
if (i > 0) {
// set the default series option
series[i - 1] = {};
if (defaultSeries.indexOf(i) == -1) {
// backup the default color (if set)
if (typeof (series[i - 1].color) !== 'undefined') {
series[i - 1].backupColor = series[i - 1].color;
}
series[i - 1].color = '#CCCCCC';
}
}
}
options['series'] = series;
function showHideSeries () {
var sel = chart.getSelection();
// if selection length is 0, we deselected an element
if (sel.length > 0) {
// if row is undefined, we clicked on the legend
if (sel[0].row == null) {
var col = sel[0].column;
if (columns[col] == col) {
// hide the data series
columns[col] = {
label: data.getColumnLabel(col),
type: data.getColumnType(col),
calc: function () {
return null;
}
};
// grey out the legend entry
series[col - 1].color = '#CCCCCC';
}
else {
// show the data series
columns[col] = col;
series[col - 1].color = null;
}
var view = new google.visualization.DataView(data);
view.setColumns(columns);
chart.draw(view, options);
}
}
}
google.visualization.events.addListener(chart, 'select', showHideSeries);
chart.draw(data,options);
"
gt$html$chart[['jsDrawChart']] <- gsub("chart.draw\\(data,options\\);", jsInsert, gt$html$chart[['jsDrawChart']])
gt
})
})