barscalecallbackex1.php

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    <?php // content="text/plain; charset=utf-8"
    require_once ("jpgraph/jpgraph.php");
    require_once ("jpgraph/jpgraph_bar.php");

    // Callback function for Y-scale to get 1000 separator on labels
    function separator1000($aVal) {
        return number_format($aVal);
    }

    function separator1000_usd($aVal) {
        return '$'.number_format($aVal);
    }

    // Some data
    $datay=array(120567,134013,192000,87000);

    // Create the graph and setup the basic parameters
    $graph = new Graph(500,300,'auto');
    $graph->img->SetMargin(80,30,30,40);
    $graph->SetScale('textint');
    $graph->SetShadow();
    $graph->SetFrame(false); // No border around the graph

    // Add some grace to the top so that the scale doesn't
    // end exactly at the max value.
    // The grace value is the percetage of additional scale
    // value we add. Specifying 50 means that we add 50% of the
    // max value
    $graph->yaxis->scale->SetGrace(50);
    $graph->yaxis->SetLabelFormatCallback('separator1000');

    // Setup X-axis labels
    $a = $gDateLocale->GetShortMonth();
    $graph->xaxis->SetTickLabels($a);
    $graph->xaxis->SetFont(FF_FONT2);

    // Setup graph title ands fonts
    $graph->title->Set('Example of Y-scale callback formatting');
    $graph->title->SetFont(FF_FONT2,FS_BOLD);
    $graph->xaxis->title->Set('Year 2002');
    $graph->xaxis->title->SetFont(FF_FONT2,FS_BOLD);

    // Create a bar pot
    $bplot = new BarPlot($datay);
    $bplot->SetFillColor('orange');
    $bplot->SetWidth(0.5);
    $bplot->SetShadow();

    // Setup the values that are displayed on top of each bar
    $bplot->value->Show();

    // Must use TTF fonts if we want text at an arbitrary angle
    $bplot->value->SetFont(FF_ARIAL,FS_BOLD);
    $bplot->value->SetAngle(45);
    $bplot->value->SetFormatCallback('separator1000_usd');

    // Black color for positive values and darkred for negative values
    $bplot->value->SetColor('black','darkred');
    $graph->Add($bplot);

    // Finally stroke the graph
    $graph->Stroke();
    ?>