I accept completed this app in a week, and managed the architecture advance by application it, aloof as the appellation said: “Create an App for Creating Itself”. Here are the links to the GitHub athenaeum and the audience on Heroku.
Before architecture the app, we charge to set up the environment. Afterwards application the latest Angular-CLI initialize the project, we additionally charge to install the best accepted UI framework in Angular: Angular Actual and Angular Flex-Layout for layout.
In the app, we will use Angular Actual heavily for components, abnormally the Timberline basal which provides the interface for apprehension nested items. Also, the app will use a lot of nested angle to apparatus the UI.
Here are all-important dependencies for the projects. We will install added bales aback bare in the afterwards discussion.
For the all-around style.scss, we pre-define some classes for blueprint and colors.
Then we will actualize the alone basal in the app: ng g basal home .
Although this activity alone has one basal which is HomeComponent, we still set up the router by creating the app-routing binder and set up the router module.
As you see in the activity preview, you may anticipate that the app contains four components: names of the steps, date picker, advance and the calendar. But the app is of bound coupling because the four apparatus allotment the aforementioned abstracts antecedent and we do not re-render the timberline already the abstracts antecedent is modified.
Same as the router, we additionally set up the actual module: app-material/material.module.ts.
Then in the app.module.ts, we will acceptation all the modules mentioned above.
Build the Timberline Structure
In this part, we appetite to set up the nested anatomy for the accomplish of the Gantt chart, and accredit the view, create, amend and annul functions for it.
Before architecture the app, I would like to allocution about the abstracts archetypal for the Angular Actual Timberline which will advice to accept the codes.
The Core Timberline DB, in addition word, it is the basis instance of the Footfall class. For the Footfall class, name is the name of the step; advance is the allotment of the footfall progress, ambit from 0 to 100; dates are the alpha date and end date of the Step; progressDates annal dates covered by accepted advance amid dates ; accomplish are the accouchement of the accepted Step; broadcast is the anatomy cachet of ancestor node, whether to appearance the children.
In the Actual Timberline DB, StepFlatNode is the chic acclimated by Angular Actual for architecture the Timberline Visualization. It is absolutely agnate with the Footfall class, but it includes some added properties: abundant for audition any accouchement inside; akin for timberline level, and the basis is akin 0. And you will apprehension that there are no accouchement nodes because Actual will abrade the tree.
For abstracts flows, the Core Timberline DB will initialize a BehaviorSubject of Step, again Angular will inject the Core Timberline DB into the HomeComponent allows it to adjure functions of the Core Timberline DB.
2. Body the Timberline (Read-Only)
In this section, we are activity to use Flat Timberline from Angular Actual to apparatus our accomplish in a nested way.
Before absolutely architecture the tree, we acquaint moment and moment-range. Both are abundant libraries to handle date data, which we will use heavily in the app. Also, we will use angular-resizable-element to accomplish the aftereffect resizable.
In this part, we will apparatus a one-way abstracts flow.
Let me accomplish the capital genitalia of the codes clear. The above anatomy of the HTML and the TypeScript are based on the examples from the documentation, but they are revised based on the project.
In SCSS file, I ascertain the acme of the node, and this helps the acme of the attack is the aforementioned as the acme of the timberline nodes. I additionally to account the bound amplitude and acme to accomplish them align.
There are so abounding codes in this step, while the aftereffect looks trivial.
But it is the antecedent to body the actual genitalia of the app.
2. Body the Timberline (Editable)
This allotment will try to apparatus the appearance of CRUD for the tree. To do so, we charge to add the close functions for both databases and new UI elements.
In this implementation, we accomplish use of Map structures in flatNodeMap and nestedNodeMap. These two maps are cadre to body the reflections amid Footfall and StepFlatNode. Whenever there is a change in the tree, the treeControl will use the maps to acquisition the node. Already the bulge is located, it will canyon the bulge and the activity to the Core Database.
As you can see in the app preview, there is not a abatement on aing to the basis step(level 0) and no abacus ons for the accomplish in akin 3. These anticipate the user to annul the accomplished activity accidentally or go too further.
Then in the acknowledgment propagation, the Subject dataChange will alarm the aing action to canyon the data, and re-generate the tree.
But there is an exception. If the user alone updates the properties, it does not crave to and alike should not re-generate the tree. In the archetype below, re-rendering the timberline will arrest the user input.
It is account to acknowledgment the action getParentStep. Given a StepFlatNode, it will acquisition out the ancestor node, which is appropriate aback the user wants to annul a step.
At first, I am cerebration about application recursion to acquisition the ancestor node. But Actual provides an interface alleged dataNode for the TreeControl chic to abundance the nodes in DFS(Depth-First Search) way, in the case, all we charge to do is to bend aback the arrangement until we acquisition the parent.
Finally, the localStorage is acclimated to abundance the user’s project. It will amend itself whenever there is a change and able for the aing visit.
3. Body Calendar
The agenda is addition analytical affection of the Gantt chart. It will announce the advance of every footfall and accommodate the user a acceptable compassionate of how things work.
You may apprehension that all the beef in the agenda are gray because of no advance for every step. If we manually change the localStorage, it looks added meaningful.
In the aftermost preview, there three types of cells. The dejected ones beggarly accepted progress; the gray ones beggarly the actual progress, and the white ones are afar from the step.
There are two new variables appear into the comedy in this part. One is dates for the attack of the calendar, addition one is today which is acclimated to abduction the cavalcade of today in the agenda and highlight it.
The buildCalendar action generates the progressDates acreage for every node. In the HTML template, for every row of the calendar, it will bend every date to actuate which status(current, remaining, exclusive) it belongs to and accredit the able chic to it.
In the SCSS file, you may apprehension that there are some roles alpha with ::ng-deep. With this, we can administer the styles to the elements central the <material-tree-node>.
It is account to acknowledgment that the cavalcade of accepted date will accept accent border.
4. Date Picker and Advance Bar
Before we body these two components, a amalgamation alleged @angular/material-moment-adapter is required. This amalgamation makes use of the moment central the Actual Date Picker, and advice to catechumen the date architecture YYYY-MM-DD to the actual bounded time.
In this part, SCSS is tricky. We charge drudge into the absence Actual basal and adapt it. The ambition is to adjust the basal band of the date picker and the slider with the calendar.
For the TypeScript, it is account to acknowledgment the fractional amend of the tree. Since we do not change the bulge structure, all we charge to do is save the change and again clean the agenda based on the dates and progress.
Inside the calendar, to abstain the user typed an actionable date, we constrain the min to the dates.start and max to the dates.end of the ancestor step. To accomplish this, we would reclaim the ahead mentioned action getParentStep to get the dates.
Good job guys! Thanks for address this diffuse tutorial and I achievement you accept auspiciously congenital your own Gantt chart.
Please 👏 yourself !!!
In the abstruse aspect, afterwards architecture this app, you may accept a basal compassionate of the Timberline structure, and become added accustomed with Angular Material, Angular Flex-layout, and Moment.
Here is a account of some of the appearance or improvements that could accomplish this app better.
If annihilation does not assignment out, amuse feel chargeless to leave your comments and ideas, and analysis out my GitHub repository.
I am attractive for your admired feedbacks. 😝
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