ChartDirector 7.0 (Perl Edition)

V-Bar Meter Orientation


      

This example demonstration various orientations for vertical bar meters.

In a vertical bar meter, the scale labels can be positioned on the left or right side of the meter scale. This is controlled by the last argument to LinearMeter.setMeter, which can be Left or Right. The color scale can also be position on the same or opposite side as the scale labels.

Source Code Listing

perldemo\vbarmeterorientation.pl
#!/usr/bin/perl # The ChartDirector for Perl module is assumed to be in "../lib" use File::Basename; use lib (dirname($0)."/../lib") =~ /(.*)/; use perlchartdir; sub createChart { my $chartIndex = shift; # The value to display on the meter my $value = 74.25; # Bar colors of the meters my $barColor = [0x2299ff, 0x00ee00, 0xaa66ee, 0xff7711]; # Create a LinearMeter object of size 70 x 240 pixels with very light grey (0xeeeeee) backgruond # and a grey (0xaaaaaa) 3-pixel thick rounded frame my $m = new LinearMeter(70, 240, 0xeeeeee, 0xaaaaaa); $m->setRoundedFrame($perlchartdir::Transparent); $m->setThickFrame(3); # This example demonstrates putting the text labels at the left or right side of the meter # scale, and putting the color scale on the same side as the labels or on opposite side. my $alignment = [$perlchartdir::Left, $perlchartdir::Left, $perlchartdir::Right, $perlchartdir::Right]; my $meterXPos = [28, 38, 12, 21]; my $labelGap = [2, 12, 10, 2]; my $colorScalePos = [53, 28, 36, 10]; # Configure the position of the meter scale and which side to put the text labels $m->setMeter($meterXPos->[$chartIndex], 18, 20, 205, $alignment->[$chartIndex]); # Set meter scale from 0 - 100, with a tick every 10 units $m->setScale(0, 100, 10); # To put the color scale on the same side as the text labels, we need to increase the gap # between the labels and the meter scale to make room for the color scale $m->setLabelPos(0, $labelGap->[$chartIndex]); # Add a smooth color scale to the meter my $smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000]; $m->addColorScale($smoothColorScale, $colorScalePos->[$chartIndex], 6); # Add a bar from 0 to value with glass effect and 4 pixel rounded corners $m->addBar(0, $value, $barColor->[$chartIndex], perlchartdir::glassEffect( $perlchartdir::NormalGlare, $perlchartdir::Left), 4); # Output the chart $m->makeChart("vbarmeterorientation$chartIndex.png"); } createChart(0); createChart(1); createChart(2); createChart(3);