A few problems with my chart: HELP!
Hello,
first of all: I really like pChart. It's a great projects! Thanks to all the wonderful people, who work on it!
I started working with pChart two days ago, so I am still kind of a newbie. I worked through the forum and the documentation, but I still have some problems with my chart, that I can't seem to solve.
1. The descriptions of my Y-axisses read from top to bottom and just won't rotate. As far as I can see, the descriptions should rotate automatically? As least, this is what it looks like in the example codes. Or am I wrong?
2. I have two grids that kind of overlay eachother (because I have two charts with one Y-axis each). Is it possible to set both Y-axisses a fixed number of ticks, so that the grid would fit for both axisses?? If not, can I at least color the second grid a little different or even erase it, so that it would not look so strange and confusing anymore?
3. I know that there are several topics about my third problem, but there seem to be only workarounds so far. I want to have the X-axis as a time series. This time interval can be very short (like two days or something) or very long ( first day of 2007 until today). Long story short: I can't really say how many points are portrayed on the X-axis. So to use "LabelSkip" is not really a great option. I would need something like: portray up to 10 labels for the X-axis ticks and set those in equal intervals. Is there anything like that? Or are only workarounds possible, to determine an appropriate "LabelSkip" value at runtime?
I would be really greatful for an answer. Here is an example chart and the code.
Code:
public function drawPartnerGrossRevenuesChart( $aGrossRevenues, $aGrossRevenuesAcc, $aDates, $sGrouping ) {
/* Create dataset object */
$myData = new pData();
/* Load palette */
$myData->loadPalette( "../include/pChart/palettes/wwg.color", TRUE );
/* Create pChart object and associate dataset */
$myPicture = new pImage(950,500,$myData);
/* Set font */
$myPicture->setFontProperties(array("FontName"=>"../include/pChart/fonts/calibri.ttf","FontSize"=>11));
/* Define the boundaries of the graph area */
$myPicture->setGraphArea(60,60,850,420);
$myPicture->drawFilledRectangle(0,0,948,498,array("R"=>165,"G"=>165,"B"=>165,"Surrounding"=>-165,"Alpha"=>50));
/* Draw title */
if ( $sGrouping == "per month" ) {
$sTitle = 'Monthly gross revenues';
$sLabel = 'Months';
}
else {
$sTitle = 'Daily gross revenues';
$sLabel = 'Days';
}
$myPicture->drawText(475,40,$sTitle,array("FontSize"=>16,"Align"=>TEXT_ALIGN_BOTTOMMIDDLE));
/* bar chart settings */
$myData->addPoints( $aGrossRevenues, 'Gross revenues' );
$myData->setSerieOnAxis( "Gross revenues", 0 );
$myData->setAxisName( 0, "Gross revenues in €" );
$myData->setAxisDisplay( 0, AXIS_FORMAT_CURRENCY, '€' );
/* line chart settings */
$myData->addPoints( $aGrossRevenuesAcc, 'Accumulated gross revenues');
$myData->setSerieWeight("Accumulated gross revenues",1);
$myData->setSerieOnAxis("Accumulated gross revenues",1);
$myData->setAxisPosition(1,AXIS_POSITION_RIGHT);
$myData->setAxisName(1,"Accumulated gross revenues in €");
$myData->setAxisDisplay( 1, AXIS_FORMAT_CURRENCY, '€' );
/* abscissa settings */
$myData->addPoints( $aDates, "Labels");
$myData->setSerieDescription("Labels", $sLabel );
$myData->setAbscissa("Labels");
/* Draw the scale */
$myPicture->drawScale( array( "GridR"=>110, "GridG"=>110, "GridB"=>112, "LabelSkip"=>5, "Mode"=>SCALE_MODE_START0 ) );
/* Draw bar chart first, without line chart serie */
$myData->setSerieDrawable("Accumulated gross revenues",FALSE);
$myPicture->drawBarChart();
/* Draw bar chart, without line chart serie */
$myData->setSerieDrawable("Gross revenues",FALSE);
$myData->setSerieDrawable("Accumulated gross revenues",TRUE);
$myPicture->drawLineChart();
/* Write the legend, also for the line chart series */
$myData->setSerieDrawable("Gross revenues",TRUE);
$myPicture->drawLegend(630,480,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));
/* Build the PNG file and send it to the web browser */
$myPicture->Render( Path::getPath('$app/www/_assets/charts/basic.png') );
}
Cheerio,
Andrea
