5 queries on Gantt UI related areas

Gantt
#1

Hello,
I am working on Gantt since last 3 weeks, and got stuck on few items and its really hard to find out the solution for me.
If any one can help me it will be great and appreciated.

  1. Adding second bar for the same project.
    Right now i am using baseline for it, but drag and drop not possible on baseline bar.

  2. Skyblue theme for Bar not working if i have custom task_class which changes the color based on the Status of the project

  3. Export to Excel and Export to PDF not working. giving 405 error.

  4. If date fields are null, in grid it shows “null” text, how to set it blank.
    i already tried setting it “” empty string, but it still shows null.

  5. Its very slow when there are more then 100 records.
    is there any way or best practice recommended to improve the performance ?

Please help me on these points,
My email id: govind.bhanushali@hotmail.com
I am stuck on these 5 points since last 2 weeks.
Please help, suggest !

#2

Hello,

  1. this is a known limitation. Custom elements can be added via api, but they won’t bind to built in drag and drop. It can be done manually, but will require some coding.

  2. I’m not sure what do you mean, it seems working ok:
    docs.dhtmlx.com/gantt/snippet/bce7362f
    One thing that you’ll probably need to override styles of a progress bar as well as main content, since it does not inherit color from the parent element.

  3. Probably there were temporary malfunctions. At this moment online services seems working correctly. Note that they can be installed locally for additional fee.

  4. Try redefining column templates so they would print empty string instead of null/undefined values
    docs.dhtmlx.com/gantt/desktop__s … esentation
    We’ll probably add a config to do this automatically, but for now the solution would be to either initialize properties of the task upon task creation (so they’ll never contain nulls), or by redefining templates
    docs.dhtmlx.com/gantt/api__gantt … event.html

  5. It can became quite slow if the time scale contains a lot of columns (big date range and small time step, e.g. showing couple of years in hour scale).
    The solution would be to either pick a bigger step for a time scale, or limit displayed range, or use some tweaks that simplify and speed up rendering of a chart

docs.dhtmlx.com/gantt/api__gantt … onfig.html
docs.dhtmlx.com/gantt/api__gantt … onfig.html