Question

尝试找出ID为 startDate 的字段的默认值。它在右下角的渲染窗口中显示“24/04/2008”，但无法看到它在代码中的设置位置。

// this methid is called each time the selected period of the chart is changed
function handleZoom(event) {
    var startDate = event.startDate;
    var endDate = event.endDate;
    document.getElementById("startDate").value = AmCharts.formatDate(startDate, "DD/MM/YYYY");
    document.getElementById("endDate").value = AmCharts.formatDate(endDate, "DD/MM/YYYY");
// as we also want to change graph type depending on the selected period, we call this method
changeGraphType(event);
}
// this method is called when user changes dates in the input field
function changeZoomDates() {
    var startDateString = document.getElementById("startDate").value;
    var endDateString = document.getElementById("endDate").value;
    var startDate = stringToDate(startDateString);
    var endDate = stringToDate(endDateString);
    chart.zoomToDates(startDate, endDate);
}

<input onChange="changeZoomDates()" style="width:100px; text-align:center" type="text" id="startDate">

JSFiddle http://jsfiddle.net/nos0q1dL/

Answer 1

没有太多文档，但请参阅此部分：

// this method is called when chart is first inited as we listen for "dataUpdated" event
function zoomChart() {
    // different zoom methods can be used - zoomToIndexes, zoomToDates, zoomToCategoryValues
    chart.zoomToIndexes(chartData.length - 7, chartData.length - 1);
 }

读取它：缩放到第一次显示图表时的最后7天，例如，您可以通过更改7到10进行确认。

要显示所有内容，您可以：

    chart.zoomToIndexes( 0, chartData.length - 1);

第一个参数是起始位置的索引，第二个参数是结束位置的索引。

Answer 2

如果按＆＃34;默认值＆＃34;你指的是＆＃34;初始值＆＃34;，那么它必须是：

document.getElementById("startDate").value = AmCharts.formatDate(startDate, "DD/MM/YYYY");

将该行替换为：

document.getElementById("startDate").value = "01/01/2007";

你会看到。

在此脚本中填充默认值的位置？

2 个答案: