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's the source-code for the original progress bar before altering the colors.
<script> new RGraph.HProgress({ id: 'cvs', min: 0, max: 20, value: [5,4,2,4], options: { marginInner: 5, tickmarks: 10, tickmarksInner: true, colors: ['red','#0f0','yellow','pink'], tooltips: ['Gary','Joel','Peter','Rich'], textSize: 14 } }).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> 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, colorsStrokeInner: 'rgba(0,0,0,0)' } }).draw(); </script>
And here's an example of some code for a Vertical Progress bar
:
<script> new RGraph.VProgress({ id: 'cvs', 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, colorsStrokeInner: 'rgba(0,0,0,0)' } }).draw() </script>