Opened 13 years ago
Closed 12 years ago
#9010 closed defect (invalid)
dojox.charting themes contain too few colors
| Reported by: | alex | Owned by: | Tom Trenka |
|---|---|---|---|
| Priority: | high | Milestone: | future |
| Component: | Charting | Version: | 1.3.0rc2 |
| Keywords: | charting, gfx | Cc: | Eugene Lazutkin, dante |
| Blocked By: | Blocking: |
Description
many charting themes seem to contain only 5 or 6 unique colors, allowing them to easily "wrap around". Themes should either have a logic that allows them to differentiate when being asked for a wrap-around color or should contain more colors in general.
Change History (3)
comment:1 Changed 13 years ago by
comment:2 Changed 13 years ago by
| Milestone: | 1.4 → future |
|---|
comment:3 Changed 12 years ago by
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
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An explanation:
The Theme object itself can support N colors; it's just a matter of adding them to the colors property/array. This can be done using [theme].defineColors or by simply creating a theme with more than 5 colors in it.
Almost all of the themes themselves use only 5 colors because after a bit of research, I found that it's rare to be plotting more than that without the charts becoming unreadable.
The question here them becomes one of deciding whether or not a theme object should recognize when more than 5 colors are called and try to generate another set of 5, or how would we determine what color to base the next 5 colors on, etc.
If you have suggestions on that, I'm all ears and can try to implement for 1.4. The big thing I ran across originally (the originals for both 0.4 and 1.0 used up to 32 colors) is that the more colors you add, the less variety between colors which makes it hard to distinguish on a chart.