HOWTO: Create a floating progress bar using transparent colors
RGraph doesn't support floating progress bars as an option, though by using the CSS3 color rgba()
color selector it can be achieved.
It works by setting the inner stroke and the first color to transparent so that they cannot be seen. If using tooltips then the first
tooltip will also need to be set to null
.
The original progress bar
Here the original progress bar is shown before altering the colors.
<script> hprogress = new RGraph.HProgress({ id: 'cvs1', min: 0, max: 20, value: [5,4,2,4], options: { margin: 5, tickmarks: 10, tickmarksInner: true, colors: ['red','#0f0','yellow','pink'], tooltips: ['Gary','Joel','Peter','Rich'], textSize: 14, textAccessible: false } }).draw(); </script>
The floating progress bar
Now the colors and values are set accordingly to make the progress appear as
though it's floating. You will need to calculate
the first value so that the first section of the bar is positioned correctly.
The first color is set to transparent
(rgba(0,0,0,0)
, the stroke color is set to transparent and the first
tooltip (if tooltips are used) is set to null.
<script> hprogress = new RGraph.HProgress({ id: 'cvs2', min: 0, max: 20, value: [5,4,2,4], options: { margin: 5, tickmarks: 10, tickmarksInner: true, colors: ['rgba(0,0,0,0)','#0f0','yellow','pink'], tooltips: [null,'Joel','Peter','Rich'], textSize: 14, textAccessible: false, colorsStrokeInner: 'rgba(0,0,0,0)' } }).draw() vprogress = new RGraph.VProgress({ id: 'cvs2', min: 0, max: 20, value: [5,4,2,4], options: { margin: 5, tickmarks: 10, tickmarksInner: true, colors: ['rgba(0,0,0,0)','#0f0','yellow','pink'], tooltips: [null,'Joel','Peter','Rich'], textSize: 14, textAccessible: false, colorsStrokeInner: 'rgba(0,0,0,0)' } }).draw() </script>