ngx-apexgantt

Angular wrapper for ApexGantt - A JavaScript library to create interactive Gantt charts.

Installation

npm install ngx-apexgantt apexgantt
# or
yarn add ngx-apexgantt apexgantt

License Setup

If you have a commercial license, set it once at app initialization before rendering any charts.

Option 1: Angular Provider (Recommended)

Standalone App:

// app.config.ts
import { ApplicationConfig } from "@angular/core";
import { provideApexGanttLicense } from "ngx-apexgantt";

export const appConfig: ApplicationConfig = {
  providers: [
    provideApexGanttLicense("your-license-key-here"),
    // other providers...
  ],
};

Module-based App:

// app.module.ts
import { NgModule } from "@angular/core";
import { provideApexGanttLicense } from "ngx-apexgantt";

@NgModule({
  providers: [provideApexGanttLicense("your-license-key-here")],
})
export class AppModule {}

Option 2: Static Method

// main.ts
import { bootstrapApplication } from "@angular/platform-browser";
import { setApexGanttLicense } from "ngx-apexgantt";
import { AppComponent } from "./app/app.component";
import { appConfig } from "./app/app.config";

// set license before bootstrapping
setApexGanttLicense("your-license-key-here");

bootstrapApplication(AppComponent, appConfig);

Quick Start

Standalone Component

import { Component } from "@angular/core";
import { NgxApexGanttComponent, TaskInput } from "ngx-apexgantt";

@Component({
  selector: "app-root",
  standalone: true,
  imports: [NgxApexGanttComponent],
  template: `
    <ngx-apexgantt
      [tasks]="tasks"
      [viewMode]="'week'"
      [height]="'500px'"
      (taskUpdateSuccess)="onTaskUpdate($event)"
    >
    </ngx-apexgantt>
  `,
})
export class AppComponent {
  tasks: TaskInput[] = [
    {
      id: "task-1",
      name: "Project Planning",
      startTime: "01-01-2024",
      endTime: "01-08-2024",
      progress: 75,
    },
    {
      id: "task-2",
      name: "Development",
      startTime: "01-09-2024",
      endTime: "01-20-2024",
      progress: 40,
      dependency: "task-1",
    },
  ];

  onTaskUpdate(event: any) {
    console.log("Task updated:", event);
  }
}

Module-based Component

import { Component } from "@angular/core";
import { TaskInput } from "ngx-apexgantt";

@Component({
  selector: "app-gantt",
  template: `
    <ngx-apexgantt [tasks]="tasks" [viewMode]="'week'" [height]="'500px'">
    </ngx-apexgantt>
  `,
})
export class GanttComponent {
  tasks: TaskInput[] = [
    // your tasks...
  ];
}

// app.module.ts
import { NgModule } from "@angular/core";
import { BrowserModule } from "@angular/platform-browser";
import { NgxApexGanttModule } from "ngx-apexgantt";
import { GanttComponent } from "./gantt.component";

@NgModule({
  declarations: [GanttComponent],
  imports: [BrowserModule, NgxApexGanttModule],
})
export class AppModule {}

Component API

Inputs

Primary Configuration

Input	Type	Description
options	GanttOptions	Complete ApexGantt configuration object

Shortcut Inputs (Optional - Override options)

Input	Type	Description
tasks	TaskInput[]	Array of tasks (shortcut for options.series)
viewMode	string	View mode: 'day', 'week', 'month', 'quarter', 'year'
theme	'light' | 'dark'	Color theme
width	string | number	Chart width
height	string | number	Chart height

Styling Inputs

Input	Type	Description
className	string	CSS class name
styles	Record<string, any>	Inline styles

Outputs (Events)

Output	Type	Description
taskUpdate	EventEmitter	Fired when a task is being updated
taskUpdateSuccess	EventEmitter	Fired after successful task update
taskValidationError	EventEmitter	Fired when form validation fails
taskUpdateError	EventEmitter	Fired when update fails
taskDragged	EventEmitter	Fired when a task is dragged
taskResized	EventEmitter	Fired when a task is resized

Public Methods

Access these methods using @ViewChild:

import { Component, ViewChild } from "@angular/core";
import { NgxApexGanttComponent } from "ngx-apexgantt";

@Component({
  template: `<ngx-apexgantt #ganttChart></ngx-apexgantt>`,
})
export class MyComponent {
  @ViewChild("ganttChart") ganttChart!: NgxApexGanttComponent;

  zoomIn() {
    this.ganttChart.zoomIn();
  }

  zoomOut() {
    this.ganttChart.zoomOut();
  }

  updateTask() {
    this.ganttChart.updateTask("task-1", { progress: 80 });
  }

  updateAll() {
    this.ganttChart.update({ viewMode: "month" });
  }
}

Method	Parameters	Description
update	options: GanttOptions	Update entire gantt configuration
updateTask	taskId: string, taskData: Partial<TaskInput>	Update a specific task
zoomIn	none	Zoom in the gantt chart
zoomOut	none	Zoom out the gantt chart
getGanttInstance	none	Get underlying ApexGantt instance

Usage Examples

Basic Example with Zoom Controls

import { Component, ViewChild } from "@angular/core";
import { NgxApexGanttComponent, TaskInput } from "ngx-apexgantt";

@Component({
  selector: "app-gantt-basic",
  standalone: true,
  imports: [NgxApexGanttComponent],
  template: `
    <div class="controls">
      <button (click)="ganttChart.zoomIn()">Zoom In</button>
      <button (click)="ganttChart.zoomOut()">Zoom Out</button>
    </div>
    <ngx-apexgantt
      #ganttChart
      [tasks]="tasks"
      [viewMode]="'week'"
      [height]="'500px'"
    >
    </ngx-apexgantt>
  `,
})
export class GanttBasicComponent {
  @ViewChild("ganttChart") ganttChart!: NgxApexGanttComponent;

  tasks: TaskInput[] = [
    {
      id: "task-1",
      name: "Planning",
      startTime: "01-01-2024",
      endTime: "01-10-2024",
      progress: 100,
    },
    {
      id: "task-2",
      name: "Development",
      startTime: "01-11-2024",
      endTime: "01-25-2024",
      progress: 60,
      dependency: "task-1",
    },
  ];
}

Advanced Example with Full Options

import { Component } from "@angular/core";
import { NgxApexGanttComponent, GanttOptions, ViewMode } from "ngx-apexgantt";

@Component({
  selector: "app-gantt-advanced",
  standalone: true,
  imports: [NgxApexGanttComponent],
  template: `
    <div class="controls">
      <select [(ngModel)]="currentViewMode" (change)="updateViewMode()">
        <option value="day">Day</option>
        <option value="week">Week</option>
        <option value="month">Month</option>
      </select>
      <button (click)="toggleTheme()">Toggle Theme</button>
    </div>
    <ngx-apexgantt
      [options]="ganttOptions"
      [viewMode]="currentViewMode"
      [theme]="currentTheme"
      (taskUpdateSuccess)="onTaskUpdate($event)"
      (taskDragged)="onTaskDragged($event)"
    >
    </ngx-apexgantt>
  `,
})
export class GanttAdvancedComponent {
  currentViewMode: string = "week";
  currentTheme: "light" | "dark" = "light";

  ganttOptions: GanttOptions = {
    series: [
      {
        id: "task-1",
        name: "Design Phase",
        startTime: "01-01-2024",
        endTime: "01-15-2024",
        progress: 75,
      },
      // more tasks...
    ],
    height: "600px",
    enableToolbar: true,
    enableTaskDrag: true,
    enableTaskResize: true,
    barBackgroundColor: "#537CFA",
    rowHeight: 32,
  };

  updateViewMode() {
    console.log("View mode changed to:", this.currentViewMode);
  }

  toggleTheme() {
    this.currentTheme = this.currentTheme === "light" ? "dark" : "light";
  }

  onTaskUpdate(event: any) {
    console.log("Task updated:", event);
    // save to backend
  }

  onTaskDragged(event: any) {
    console.log("Task dragged:", event);
  }
}

Data Parsing Example

import { Component } from "@angular/core";
import { NgxApexGanttComponent, GanttOptions } from "ngx-apexgantt";

@Component({
  selector: "app-gantt-parsing",
  standalone: true,
  imports: [NgxApexGanttComponent],
  template: `<ngx-apexgantt [options]="ganttOptions"></ngx-apexgantt>`,
})
export class GanttParsingComponent {
  // external data format from API
  apiData = [
    {
      task_id: "T1",
      task_name: "Design Phase",
      start_date: "01-01-2024",
      end_date: "01-15-2024",
      completion: 75,
    },
    {
      task_id: "T2",
      task_name: "Development",
      start_date: "01-16-2024",
      end_date: "01-30-2024",
      completion: 40,
    },
  ];

  ganttOptions: GanttOptions = {
    series: this.apiData,
    parsing: {
      id: "task_id",
      name: "task_name",
      startTime: "start_date",
      endTime: "end_date",
      progress: "completion",
    },
    height: "500px",
  };
}

Event Handling Example

import { Component } from "@angular/core";
import { NgxApexGanttComponent } from "ngx-apexgantt";

@Component({
  selector: "app-gantt-events",
  standalone: true,
  imports: [NgxApexGanttComponent],
  template: `
    <ngx-apexgantt
      [tasks]="tasks"
      (taskUpdateSuccess)="handleTaskUpdate($event)"
      (taskDragged)="handleTaskDragged($event)"
      (taskResized)="handleTaskResized($event)"
      (taskUpdateError)="handleError($event)"
    >
    </ngx-apexgantt>
    <div class="event-log">
      <h3>Event Log:</h3>
      <pre>{{ eventLog }}</pre>
    </div>
  `,
})
export class GanttEventsComponent {
  tasks = [
    // your tasks...
  ];

  eventLog = "";

  handleTaskUpdate(event: any) {
    this.eventLog += `Task Updated: ${event.taskId}\n`;
    // sync with backend
    this.syncWithBackend(event.updatedTask);
  }

  handleTaskDragged(event: any) {
    this.eventLog += `Task Dragged: ${event.taskId} moved ${event.daysMoved} days\n`;
  }

  handleTaskResized(event: any) {
    this.eventLog += `Task Resized: ${event.taskId} duration changed by ${event.durationChange}\n`;
  }

  handleError(event: any) {
    console.error("Update failed:", event.error);
  }

  async syncWithBackend(task: any) {
    // your API call here
  }
}

Column Configuration

Customize task table column widths:

import { ColumnKey } from "ngx-apexgantt";

ganttOptions: GanttOptions = {
  series: tasks,
  columnConfig: [
    {
      key: ColumnKey.Name,
      title: "Task Name",
      minWidth: "100px",
      flexGrow: 3,
    },
    {
      key: ColumnKey.StartTime,
      title: "Start",
      minWidth: "100px",
      flexGrow: 1.5,
    },
    {
      key: ColumnKey.Duration,
      title: "Duration",
      minWidth: "80px",
      flexGrow: 1,
    },
  ],
};

Annotations

Add visual annotations to highlight specific dates or date ranges:

ganttOptions: GanttOptions = {
  series: tasks,
  annotations: [
    {
      x1: "10-25-2024",
      x2: "END_DATE",
      label: {
        text: "Sprint 1",
        fontColor: "#333333",
      },
    },
  ],
};

TypeScript Support

The library is fully typed. Import types as needed:

import {
  NgxApexGanttComponent,
  GanttOptions,
  TaskInput,
  ViewMode,
  ColumnKey,
  TaskUpdateDetail,
  TaskDraggedDetail,
} from "ngx-apexgantt";

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.