javascript — изменение размеров сгенерированного графика
Следующий код используется для создания диаграммы с использованием библиотеки javascript fusioncharts! Несмотря на то, что диаграмма выглядит слишком маленькой и выровненной по верхнему левому углу экрана! Как можно увеличить высоту и выровнять график по центру экрана?
<?php
require_once("includes/db.php");
require("src/fusioncharts.php");?><!-- You need to include the following JS file to render the chart.
When you make your own charts, make sure that the path to this JS file is correct.
Else, you will get JavaScript errors. -->
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<?php
// Form the SQL query that returns the top 10 most populous countries
$sql = "Select count(Email) as Number,Date from reportorder GROUP BY date";
// Execute the query, or else return the error message.
$result =mysqli_query($db,$sql);
// If the query returns a valid response, prepare the JSON string
if ($result) {
// The `$arrData` array holds the chart attributes and data
$arrData = array(
"chart" => array(
"caption" => "Online orders on daily basis",
"paletteColors" => "#0075c2",
"bgColor" => "#ffffff",
"borderAlpha"=> "50",
"canvasBorderAlpha"=> "0",
"usePlotGradientColor"=> "0",
"plotBorderAlpha"=> "10",
"showXAxisLine"=> "1",
"xAxisName"=> "Date",
"xAxisLineColor" => "#999999",
"showValues" => "0",
"divlineColor" => "#999999",
"divLineIsDashed" => "1",
"showAlternateHGridColor" => "0",
"yAxisName"=> "Number of online orders")
);
$arrData["data"] = array();
// Push the data into the array
while($row = mysqli_fetch_array($result)) {
array_push($arrData["data"], array(
"label" => $row["Date"],
"value" => $row["Number"]
)
);
}
/*JSON Encode the data to retrieve the string containing the JSON representation of the data in the array. */
$jsonEncodedData = json_encode($arrData);
/*Create an object for the column chart using the FusionCharts PHP class constructor. Syntax for the constructor is ` FusionCharts("type of chart", "unique chart id", width of the chart, height of the chart, "div id to render the chart", "data format", "data source")`. Because we are using JSON data to render the chart, the data format will be `json`. The variable `$jsonEncodeData` holds all the JSON data for the chart, and will be passed as the value for the data source parameter of the constructor.*/
$columnChart = new FusionCharts("column2D", "myFirstChart" , 600, 300, "chart-1", "json", $jsonEncodedData);
// Render the chart
$columnChart->render();
// Close the database connection
$db->close();
}
?>
Решение
Ваш код выглядит хорошо, для выравнивания используйте css, для div, где отображается диаграмма.
<?php
include("fusioncharts.php");
$hostdb = "localhost"; // MySQl host
$userdb = "root"; // MySQL username
$passdb = ""; // MySQL password
$namedb = "mscombi2d"; // MySQL database name
$dbhandle = new mysqli($hostdb, $userdb, $passdb, $namedb);
if ($dbhandle->connect_error) {
exit("There was an error with your connection: ".$dbhandle->connect_error);
}?>
<html>
<head>
<title>FusionCharts XT - Column 2D Chart - Data from a database</title><!-- You need to include the following JS file to render the chart.
When you make your own charts, make sure that the path to this JS file is correct.
Else, you will get JavaScript errors. -->
<script type="text/javascript" src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<style type="text/css">
#chart-1{
width: 100%;
text-align: center;
}
</style>
</head>
<body>
<?php
// Form the SQL query that returns the top 10 most populous countries
$sql = "SELECT DISTINCT category, value1 FROM mscombi2ddata";
// Execute the query, or else return the error message.
$result = $dbhandle->query($sql) or exit("Error code ({$dbhandle->errno}): {$dbhandle->error}");
// If the query returns a valid response, prepare the JSON string
if ($result) {
// The `$arrData` array holds the chart attributes and data
$arrData = array(
"chart" => array(
"caption" => "Online orders on daily basis",
"paletteColors" => "#0075c2",
"bgColor" => "#ffffff",
"borderAlpha"=> "50",
"canvasBorderAlpha"=> "0",
"usePlotGradientColor"=> "0",
"plotBorderAlpha"=> "10",
"showXAxisLine"=> "1",
"xAxisName"=> "Date",
"xAxisLineColor" => "#999999",
"showValues" => "0",
"divlineColor" => "#999999",
"divLineIsDashed" => "1",
"showAlternateHGridColor" => "0",
"yAxisName"=> "Number of online orders")
);
$arrData["data"] = array();
// Push the data into the array
while($row = mysqli_fetch_array($result)) {
array_push($arrData["data"], array(
"label" => $row["category"],
"value" => $row["value1"]
)
);
}
/*JSON Encode the data to retrieve the string containing the JSON representation of the data in the array. */
$jsonEncodedData = json_encode($arrData);
/*Create an object for the column chart using the FusionCharts PHP class constructor. Syntax for the constructor is ` FusionCharts("type of chart", "unique chart id", width of the chart, height of the chart, "div id to render the chart", "data format", "data source")`. Because we are using JSON data to render the chart, the data format will be `json`. The variable `$jsonEncodeData` holds all the JSON data for the chart, and will be passed as the value for the data source parameter of the constructor.*/
$columnChart = new FusionCharts("column2D", "myFirstChart" , 600, 300, "chart-1", "json", $jsonEncodedData);
// Render the chart
$columnChart->render();
// Close the database connection
$dbhandle->close();
}
?>
<div id="chart-1">Fusion Charts will render here</div>
</body>
</html>
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