Hello ash_win14
To display delayed tasks in gantt you should structure your tasks to include baseStart, start, baseEnd, end, and a status flag to indicate if the task is delayed. Here is an example of how you can define a task object:
const tasks = [
{
id: 1,
start: new Date(2024, 3, 2),
end: new Date(2024, 3, 17),
base_start: new Date(2024, 3, 2),
base_end: new Date(2024, 3, 13),
text: "Project planning",
progress: 30,
parent: 0,
type: "summary",
open: true,
details: "Outline the project's scope and resources.",
},
{
id: 10,
start: new Date(2024, 3, 2),
end: new Date(2024, 3, 5),
base_start: new Date(2024, 3, 2),
base_end: new Date(2024, 3, 2),
text: "Marketing analysis",
progress: 100,
parent: 1,
type: "task",
details: "Analyze market trends and competitors.",
},
// more tasks...
];
Then you can create a function to determine if a task is delayed based on the start and end date comparisons:
const isDelayed = (task) => {
return task.end > task.base_end; // You might want to adjust this logic
};
After that you can visually represent these tasks by adding to the columns config information about base start and base end columns:
[
{
id: "base_start",
header: "Base start",
align: "center",
template: (date) => {
return date ? date.toLocaleDateString() : "";
},
},
{
id: "base_end",
header: "Base end",
align: "center",
template: (date) => {
return date ? date.toLocaleDateString() : "";
},
},
]
Also you might want to customize the appearance of the tasks based on their status using taskTemplate property.
Please take a look at the example: https://stackblitz.com/edit/vitejs-vite-gzfr4n69?file=src%2FGanttComponent.jsx,src%2Fdata.js,src%2FCustomTemplate.jsx
