samples/02_extensions/18_linked_tasks.html Add lag to the relationship in Links but the page that appears after setting is not drawn according to the data
{
“id”: “25”,
“source”: “12”,
“target”: “19”,
“type”: “0”,
lag: “2”
}, {
“id”: “17”,
“source”: “18”,
“target”: “19”,
lag: “2”,
“type”: “0”
}
Hello Dangxiaowei,
After I add the lag parameter to the links, task 2.3 is moved to a new date like it is shown on your screenshot. Please, clarify how you imagine it should work.
Task1 I set lag 2 but the page shows 3, How do I make the page look the same as the lag I set
Hello Dangxiaowei,
Thank you for the clarification.
There are 2 links that point to the same task. Task #2.3 cannot start earlier because of Task #2.2. To make it work as you want, it would require to move Task #1 to 03 April. But that is a backward scheduling mode when the tasks are scheduled from successors. To enable that mode, you need to turn on the gantt.config.schedule_from_end option:
https://docs.dhtmlx.com/gantt/desktop__auto_scheduling.html#backwardscheduling
Hello Dangxiaowei,
If you want to filter tasks, you need to use the onBeforeTaskDisplay event handler:
https://docs.dhtmlx.com/gantt/api__gantt_onbeforetaskdisplay_event.html
To filter tasks depending on their level, you can check the temporary property $level.
Here is an example of how it can be implemented:
http://snippet.dhtmlx.com/5/37729e533
If you want to remove these tasks, you can also use this temporary property and iterate all tasks with the eachTask method:
https://docs.dhtmlx.com/gantt/api__gantt_eachtask.html
gantt.eachTask(function(task){
if (task.$level > max_level) gantt.deleteTask(task.id)
})
Here is the snippet:
http://snippet.dhtmlx.com/5/03412e8ef
If you need something different, please, describe your question in more detail.
Hello Dangxiaowei,
The placeholder task is an unscheduled task, it won’t show the current date.
https://docs.dhtmlx.com/gantt/desktop__unscheduled_tasks.html
The easiest way to change that would be to modify the date_grid template and show the dates for the placeholder task:
gantt.templates.date_grid = function(date, task, column){
if(task && task.type == 'placeholder' && gantt.config.show_unscheduled){
return gantt.templates.grid_date_format(date)
}else{
return gantt.templates.grid_date_format(date);
}
}
https://docs.dhtmlx.com/gantt/api__gantt_date_grid_template.html
Here is the snippet:
http://snippet.dhtmlx.com/5/b8e7542a1
Hello Dangxiaowei,
You can change the views by modifying the layout configuration:
https://docs.dhtmlx.com/gantt/desktop__layout_config.html
I have the following samples where you can toggle the grid and timeline:
http://snippet.dhtmlx.com/5fc27c820
http://snippet.dhtmlx.com/5/ecdb905f9
If you want to modify the layout in a more complex way, you need to implement a custom solution. I have the following snippets that can help you to start:
https://snippet.dhtmlx.com/5/9ec902bf7
https://snippet.dhtmlx.com/5/fe84dbaaf
Hello, I am setting the task calendar when the task duration is unchanged and the end time is changed. How to achieve this
Hello Dangxiaowei,
If you add a new calendar after the task is loaded, you need to manually recalculate the dates. The following article describes how to do that:
https://docs.dhtmlx.com/gantt/desktop__working_time.html#changingcalendardynamically
Hello, I have loaded 5000 tasks at the same time, but when I double-click to get the total time difference of the task, the value is very slow.I just call the API you provided and set time = gantt.getTotalSlack(task);How to optimize it.Or how to use Gantt in a Worker
Hello Dangxiaowei,
Thank you for letting us know about the issue. I added it as a bug to our internal tracker. The dev team will try to fix it in the future, but I cannot give you any ETA.
Hello, I set it
gantt.config.schedule_from_end = false;
gantt.config.project_start = new Date(2021, 11, 15);
If get
Hello Dangxiaowei,
The performance with the Total Slack calculation was improved in the 7.1.7 version:
https://docs.dhtmlx.com/gantt/whatsnew.html#717
Unfortunately, your question in the last message is not clear to me. Please, describe it in more detail.
Hello Dangxiaowei,
I couldn’t reproduce that issue in the snippet:
https://snippet.dhtmlx.com/xhj1c00a
Probably, you are using an old Gantt version. The total slack calculation bug was fixed in the 7.1.7 version:
https://docs.dhtmlx.com/gantt/whatsnew.html#717
If that doesn’t help you, probably, the issue is related to the Gantt configuration, but it is hard to suggest what might be wrong as I don’t see your code.
In that case, please add your configuration to the following snippet and make sure that the issue is reproduced there:
https://snippet.dhtmlx.com/40tsh9uz
Then, click on the Save button and send me the link.
Or send me a ready demo with all the necessary JavaScript and CSS files so that I can reproduce the issue locally.
