Styling The Timetable View in JavaScript Scheduler

In this blog post we are going to look at the most common adjustments in the appearance of a timetable that developers want to make based on the questions we have received regarding MindFusion Scheduler library for Java Script.

Here is how our timetable will look at the end:

Styling the Timetable View in JS Scheduler

I. General Looks

The overall appearance of the scheduling library is controlled by themes. MindFusion Scheduler comes with a collection of 9 predefined themes. In order to apply a theme you need to:

  • add a reference to the CSS file in the web page where you want the calendar to appear:
    <link rel="stylesheet" type="text/css" href="themes/gray.css">
  • assign the name of the theme to the theme property of the Calendar class:
    calendar.theme = "gray";
  • Themes can change dramatically the color scheme of the control including the forms that appear for item creation. We recommend that you choose the theme that is most closely related to the colors you want to see and customize it, if necessary.

    Themes in the JavaScript Scheduler

    Each of the themes is in a CSS file and you can search by the color code and replace the occurrences of a given color with another one to fine-tune the color scheme.

    II. Timetable Settings

    Initially, a timetable renders only one day – today. The timetableSettings property, just like the *settings properties for all views supported by the Calendar (—SingleMonth, RespurceView, MonthRange etc.) expose the properties that let you customize the look of the calendar.

    In the case with the timetableView, the number of columns that are rendered depends on the number of dates added to the dates propеrty of timetableSettings In our case we want to show the week, so we add 7 dates:

    //get the current date
    var currDay = schedule.DateTime.today();
    calendar.timetableSettings.dates.clear();
    
    for (var i = 1; i < 8; i++) {
    	calendar.timetableSettings.dates.add(currDay.addDays(-1 * currDay.dayOfWeek + i));	
    	}
    }

    Setting the Number Of Dates in a Timetable in the JavaScript Scheduler

    We also want to scroll week by week. By default the timetable scrolls with one day. In order to scroll more you need to set the scrollStep property to a bigger number:

    calendar.timetableSettings.scrollStep = 7;

    The next thing that we need is to change the time scale. We want the scales to be per 20 minutes and we want to cover the time interval from 10 to 16 o’clock. These is regulated with the startTime and endTime fields of timetableSettings These properties take as an argument the number of minutes. So, if you want your day to start at 8 o’clock your start time needs to be 8×60=480 minutes or you need to assign 480 as value to the startTime property.

    // set the start time to 10:00 AM
    calendar.timetableSettings.  = 600;
    // set the end time to 16:00 PM
    calendar.timetableSettings.endTime = 1020;

    What we want to specify is the format of the header. The default format is based on the locale settings of the user that runs the application. In our application the date in the timetable header renders as DD/MM/YYYY. We will use the titleFormat property. We also use cellTime to change the time scales between each two hours. The default value is 30 minutes. We change it to 20 with the cellTime property.

    calendar.timetableSettings.titleFormat = "d MMMM 
     dddd";
    calendar.timetableSettings.cellTime = schedule.TimeSpan.fromMinutes(20);
    calendar.timetableSettings.cellSize = 20;

    Adjusting the Timetable Settings in the JavaScript Scheduler

    We also increase the cell size – this is the height of rows that are defined by each 20-minute interval. The calendar also shows just one header – that with the dates. We want to render the days header, which shows the day of the week. The property for that is showDayHeader

    calendar.timetableSettings.showDayHeader = true;

    III. CSS Styling

    We’ve customized our timetable as much as we could through the properties and fields of the Calendar control. We would like to add some additional styling, which can be done through css. We use the style inspector of the browser to identify the styles that are applied on the elements that interest us. We would like to show the lines that separate 20 minute cells in yellow and the lines that separate hours in red. Let’s start with the hour lines. The css to render them in red is this one:

    .mfp-timetable-view .mfp-content .mfp-column .mfp-cell-wrap:nth-child(3n+1) .mfp-cell { 
    			border-top: 1px solid red; 
    }

    The class that styles cells is called mfo-cell-wrap. This class regulates the styling for all cells, so we need to apply red border only on the cells that interest us, and they are the 1st, 4th, 9th etc. cell. We want the rest of the cells to be yellow. This is done with the CSS “not” keyword:

    .mfp-timetable-view .mfp-content .mfp-column .mfp-cell-wrap:not(:nth-child(3n+1)) .mfp-cell {  
    			border-top: 1px solid yellow; 
    	}

    This colors the rows of the timetable red/yellow but does not color the delimeters between the time scales. They are regulated by another CSS class and are div elements:

    .mfp-timetable-view.gray .mfp-header-timeline .mfp-group-time div:not(:first-child)
    	{
    
    		border-top: solid 1px yellow;
    	}
    		
    	.mfp-timetable-view.gray .mfp-header-timeline .mfp-hour
    	{
    		border-top: solid 1px red;
    	}

    Note that the CSS style names are with the suffix “gray”. This is the name of the theme. In many cases the class that needs to be changed is bound to a certain theme.

    The last thing that we want to add as styling is a background for the weekend days. We use again the nth-child CSS property. This time the “children” are the 6th and 7th element, so we define styles for them:

    .mfp-timetable-view .mfp-content .mfp-column:nth-child(5n + 6), .mfp-column:nth-child(5n + 7) {
    			background-color: rgba(145, 179, 188, 0.4);
    		}

    We note one more thing. When we create an appointment, the text of the subject is not visible because the line height is too small for the item styling. We have two options: either to increase the cell height, which is set with cellSize and is 20 or to style the item, so that the subject is visible. We choose the latter. We will make the resize line-s smaller because that’s what hiding the subject: the big resize lines:

    .mfp-item-vertical-detail .mfp-subject {
    	flex-shrink: 0 !important;
    }
    
    .mfp-item-vertical-detail .mfp-resize-start,
    .mfp-item-vertical-detail .mfp-resize-end {
    	flex-shrink: 1 !important;
    }

    Here is the final result:

    Styling the Timetable Vew in JS Scheduler

    You can download the sample with all libraries ued and the full source code from this link:

    Styling a Timetable in the JavaScript Scheduler

    You can post technical questions, comments and recommendations about MindFusion Scheduling for JavaScript at the library online forum.

    About Scheduling for JavaScript: MindFusion Js Scheduler is the right solution for all applications that need to render interactive timetables, rich event calendars, lists with appointments or resources. Fully responsive, highly customizable and easy to integrate, you can quickly program the JavaScript scheduling library according to your needs. The library supports a variety of export options, styling through themes, 6 calendar views and much more. Find out more at https://mindfusion.eu/javascript-scheduler.html

    A Monthly Calendar in Java Swing that Ends at a Given Date

    In this blog post we will build a monthly calendar in Java Swing using the scheduler library. We will use the monthly view of the calendar but we will make it render only 3 months after the current month. By default there are no limits how far users can scroll the months in Single month view both back- and forth-wards. We will let our users scroll as many months they want in the past but only scroll 3 months ahead.

    I. General Settings

    We create an empty project in Eclipse and add the JPlanner.jar as an external Jar library as shows in this picture:

    Then we create a Java class that extends JFrame and there, in the constructor we create a new instance of the Calendar class:

    calendar = new Calendar();
    getContentPane().add(calendar, BorderLayout.CENTER);

    Then we set the current view to be SingleMonth using the setCurrentView method and we set the theme to be silver with setTheme calendar supports a variety ot views and themes, which are members of the CalendarView and ThemeType enumerations.

    II. Handling Events

    We will use the addCalendarListener method to add an instance of the CalendarAdapter class that is used to handle events in the Calendar

    calendar.addCalendarListener(new CalendarAdapter(){		
    		
    		@Override()
    		public void visibleDateChanged(DateChangedEvent e) {
    			onVisibleDateChanged(e);
    		}
    		
    	});

    We will handle the visibleDateChanged event and check when the user is about to scroll to a month that we do not want to show. In our sample we want the user to be able to scroll only three months in advance.

    The Calendar initializes by default with the current date being visible. For a CalendarView this means the current month is rendered. We will keep this date in a global variable for the class because we want to be able to use it in the event handler method:

    protected MainWindow()
    {
    	setDefaultCloseOperation(EXIT_ON_CLOSE);
    	setSize(400, 400);
    	setTitle("Tutorial 1");
    	initialDate = DateTime.now();
    	...........................
    	...........................
    }
    
    private Calendar calendar;
    private DateTime initialDate;

    We will use our initialDate variable to reset the calendar to a data three months after it. Whenever we detect that the user is about to scroll to the 4th month, we reset the date to be 3 months after initialDate’s month. Here is how:

    //make sure that dates are rendered till the end of May
    public void onVisibleDateChanged(DateChangedEvent e)
    {
    					
    	if(e.getNewDate().getMonth() == initialDate.getMonth() + 4)
    	{		
    		calendar.setDate(new DateTime(initialDate.getYear(), 
    				initialDate.getMonth() + 3, initialDate.getDay()));
    	}
    }

    Now if the user want to go to the 4th month, the view will always bring the 3rd month and will not allow switiching to the month ahead.

    With that our tutorial is finished. You can download the sample code from this link:

    Monthly Calendar with Fixed End Date

    Technical support is available at the Java Swing Online Discussion Forum.

    About MindFusion Scheduling for Java Swing: The library provides extensive feature-set for creating and customizing all sorts of calendars, task lists, time-management tables, resource allocation tables and other. It boasts various options for customizing appearance and numerous events for handling user actions. The distribution archive includes a lot of samples and detailed documentation. Learn more at https://mindfusion.eu/java-scheduler.html

    Custom Painting of Resources in Java Scheduler

    In this blog post we will explain how to color cells and resources in the Resource view of the calendar based on a certain criteria. In our case we take the “Resource Table” sample from the Samples for the Java Swing Scheduler and we will edit its code to color the header and background of cells that correspond to given resources, in our sample it is an employee:

    We will also add tooltips that show when the mouse is over cells that correspond to this employee:

    I. General Settings

    The code that we will demonstrate and explain is an extension to the “Resource Table” sample, which you can download from:

    Download Resource Table Java Scheduler Sample

    The sample uses the Scheduling Library for Java Swing, which is included as a Jar reference to the project.

    We create an instance of the Calendar class and set its current time, date and the end date – this is the final date that will be visible in the resource view:

    calendar = new Calendar();
    calendar.setCurrentTime(DateTime.now());
    calendar.setDate(new DateTime(2020, 6, 8));
    calendar.setEndDate(new DateTime(2020, 7, 7));
    

    The Calendar class exposes many methods for customizing the schedule. We first set the view to be CalendarView itemSettings and resourceViewSettings classes provide us with lots of options to customize the calendar look. We use them to twist the appearance of our resource table:

    calendar.getItemSettings().getSelectedItemStyle().setHeaderFont(new Font("Verdana", Font.PLAIN, 9));
    calendar.getItemSettings().getSelectedItemStyle().setHeaderTextAlignment(EnumSet.of(TextAlignment.MiddleLeft));
    calendar.getItemSettings().getSelectedItemStyle().setHeaderTextShadowStyle(ShadowStyle.None);
    ...........................
    ...........................
    calendar.getItemSettings().getStyle().setHeaderFont(new Font("Verdana", Font.PLAIN, 9));
    calendar.getItemSettings().getStyle().setHeaderTextAlignment(EnumSet.of(TextAlignment.MiddleLeft));
    calendar.getItemSettings().getStyle().setHeaderTextShadowStyle(ShadowStyle.None);
    calendar.getItemSettings().getStyle().setHeaderTextShadowOffset(0);
    ...........................
    ...........................
    calendar.getResourceViewSettings().getBottomTimelineSettings().setFormat("EEE (MM/dd)");
    calendar.getResourceViewSettings().getBottomTimelineSettings().setSize(15);
    calendar.getResourceViewSettings().getBottomTimelineSettings().getStyle().setHeaderBrush(Brushes.White);
    calendar.getResourceViewSettings().getBottomTimelineSettings().getStyle().setHeaderFont(new Font("Verdana", Font.BOLD, 10));

    The employees are instances of the Contact class. We add them to the contacts collection of the Calendar, once we’ve created them. It is important that we provide an id to each Contact, because that’s how we will identify them later in code:

    Contact contact = new Contact();
    contact.setFirstName("Mike");
    contact.setId("IdMike");
    contact.setName("Mike");
    calendar.getContacts().add(contact);

    The items that represent tasks for the resources are Appointment instances. We create them in code and add them to the items collection of the Calendar app;

    app = new Appointment();
    app.setStartTime(new DateTime(2006, 3, 27));
    app.setEndTime(new DateTime(2006, 3, 28));
    app.getContacts().add(calendar.getSchedule().getContacts().get("IdMike"));
    app.setHeaderText("21965 Carbon Mesa Rd (1)");
    app.setPriority(0);
    calendar.getSchedule().getItems().add(app);

    The resource view renders rows of cells that correspond to a given Resource, Location, Item, Task etc. The options available are members of the GroupType enumeration. In our sample we group the view by resources e.g. employees:

    calendar.setGroupType(GroupType.GroupByContacts);

    And with that we’ve finished with the general settings and we continue writing the code that will customize our application.

    II. Custom Drawing

    What we want to achieve as appearance of our resource table – selective coloring of the background of cells – can be done through custom drawing. Custom drawing provides us with means to color most elements of the calendar, depending on the view. The “Custom Draw Elements” sample gives us visual representation of the elements that correspond to the CustomDrawElements enumeration, which determines what is to be custom drawn in a schedule:

    The sample is available from this link:

    Java Swing Scheduler: Sample that Demonstrates the Custom Draw Elements according to the Calendar View

    We want to color the resource header and the cells that correspond to this resource. So we use the setCustomDraw method to achieve that:

    calendar.setCustomDraw(EnumSet.of(CustomDrawElements.ResourceViewRowHeader, CustomDrawElements.ResourceViewCellComplete));

    The members of the CustomDrawElements enumeration allow bitwise combining. The drawing is done in an event handler for the draw event:

    calendar.addCalendarListener(new CalendarAdapter() {
    	public void draw(CalendarDrawEvent e) {
    		onCalendarDraw(e);
    	}
    });

    We use a CalendarAdapter to subscribe to the draw event, which we handle with the onCalendarDraw method. The CalendarDrawEvent class exposes many properties that give us information about the element that is being drawn. We use the getElement method to check, which element is being drawn – the cell or the header. If it is the cell, we get the resource that correspond to it and if it is the right one, we paint a rectangle, which represents the whole area of the element that is painted at the moment. We get it with the getBounds method:

    if (e.getElement() == CustomDrawElements.ResourceViewCellComplete)
    {
    	Rectangle bounds = new Rectangle(e.getBounds());
    	bounds.x += 1;
    
    if (e.getResource().getId().equals("IdMike") ||
        e.getResource().getId().equals("IdChuck") ||
        e.getResource().getId().equals("IdTom") ||
        e.getResource().getId().equals("IdAlfredo"))
    				
    {
    	g.fillRectangle(_brush3, bounds);
    	g.drawString("Office", _font, _textBrush, bounds, f);
    }

    We will draw an outline to the resource header that correspond to the same resource, whose rows we colored with _brush3:

    else if (e.getElement() == CustomDrawElements.ResourceViewRowHeader)
    	{
    		if (e.getResource().getId().equals("IdMike") ||
    			e.getResource().getId().equals("IdChuck") ||
    			e.getResource().getId().equals("IdTom") ||
    			e.getResource().getId().equals("IdAlfredo"))
    					
    		{
    			Brush _brush3 = new SolidBrush(new Color(254, 249, 207, 100));
    			g.fillRectangle(_brush3, e.getBounds());
    			g.drawRectangle(new Pen(new Color(163, 198, 134, 255), 2),
    				e.getBounds().getMinX() + 1,
    				e.getBounds().getMinY() + 1,
    				e.getBounds().getMaxX() - 2,
    				e.getBounds().getMaxY() - 2);
    		}
    			
    	}

    Here we check if the custom draw element is CustomDrawElements The CalendarDrawEvent class, which provides data for the event gives us sufficient information to recognize the exact element that is being painted.

    III. Tooltips Over Selected Resources

    By default the Calendar provides tooltips for items. The ItemTooltipEvent provides more information about this. However, we want to show tooltips when the user hovers over cells that correspond to the elements that we’ve painted in section II. We can do that by using a MouseMotionListener and subscribing to the mouseMove event. Note that these are standard Java Swing events:

    calendar.addMouseMotionListener(new MouseAdapter() {
    	public void mouseMoved(MouseEvent e) {
    		onCalendarMouseMoved(e);
         }
    		
    });

    In the event handler method we use the getResourceAt method of the Calendar to learn the resource, over which the mouse is hovering. Then we use the id-s that we’ve assigned to our resources and check if the mouse is over the resources that we want to render tooltips:

    private void onCalendarMouseMoved(MouseEvent e) {
    		
    		Resource res = calendar.getResourceAt(e.getX(), e.getY());
    		
    		if (res.getId().equals("IdMike") ||
    		    res.getId().equals("IdChuck") ||
    		    res.getId().equals("IdTom") ||
    		    res.getId().equals("IdAlfredo"))
    		{				
    			   calendar.setToolTipText(res.getId());				
    				
    		}
    		else
    		{
    		     calendar.setToolTipText("");		    
    		}			
    		
    }

    When we detect that the mouse is over a resource that does not need to render tooltip, we set the tolltip text to be an empty string.

    With that we’ve finished customizing the resource sample. You can download the extended version from this link:

    Resource Table in Java Swing with Tooltips and Resource Coloring: Download

    You are welcome to post your questions and comments at the Online Forum for Scheduling for Java Swing.

    About MindFusion Scheduling for Java Swing: The library provides extensive feature-set for creating and customizing all sorts of calendars, task lists, time-management tables, resource allocation tables and other. It boasts various options for customizing appearance and numerous events for handling user actions. The distribution archive includes a lot of samples and detailed documentation. Learn more at https://mindfusion.eu/java-scheduler.html

    Ski School Scheduler in JavaScript

    In this blog post we will create the following timetable that shows the registered ski classes for a ski school week per week:

    Ski School Scheduler

    We use MindFusion JavaScript Scheduler to create the timetable. We use the BaseForm class to create the custom form that allows us to choose the level of the skier.

    This is not possible in the standard appointment form that comes with the scheduling library.

    I. General Settings

    We need to add a DIV element with an id at the location where we want the timetable to appear on the page. Note that the size of the DIV determines the size of the calendar:

     

    MindFusion.Scheduling requires a reference to MindFusion.Scheduling:

    <script src="MindFusion.Scheduling.js" type="text/javascript"></script>
    <script src="SkiSchoolSchedule.js" type="text/javascript"></script>
    <script src="SkiStudentForm.js" type="text/javascript"></script>

    We also add a reference to two JavaScript files that will contain the source code for our application: SkiSchoolSchedule and SkiStudentForm. Finally we add a reference to the CSS file that defines the theme used by the timetable – business.css:

    <link rel="stylesheet" type="text/css" href="themes/business.css">

    The Scheduling library offers a variety of CSS themes, which you can customize or use as a template to create new ones.

    II. The Timetable

    In the code-behind file we add a mapping to MindFusion.Scheduling namespace and then create the Calendar instance using the id of the DIV element that will render it:

    var p = MindFusion.Scheduling;
    
    // create a new instance of the calendar
    calendar = new p.Calendar(document.getElementById("calendar"));
    
    // set the view to Timetable, which displays the allotment of resources to distinct hours of a day
    calendar.currentView = p.CalendarView.Timetable;
    
    //set the theme to business as referenced calendar.theme = "business";

    We also set the currentView property to CalendarView and specify the theme – business as the name of the CSS file that we referenced.

    The timetableSettings class exposes a dates property where we add the initial dates that will appear in the view:

    //get the current date
    var currDay = p.DateTime.today();
    calendar.timetableSettings.dates.clear();
    
    /* add dates to the timetable in such manner that always a full week
    rom Mo to Su will be visible */
    for(var i = 1; i < 8; i++)
    {
        calendar.timetableSettings.dates.add(currDay.addDays(-1 * currDay.dayOfWeek + i));
    }

    We get the current date and add in a cycle all 7 days of the week that contains it. We set the scrollStep property to 7, which indicates the number of days that will appear by initial click on one of the navigation arrows in the header:

    // set the number of days to scroll with when a navigation button is clicked
    calendar.timetableSettings.scrollStep = 7;

    We will also use the startTime and endTime properties to indicate the start and and time of the timetable for each day. Those properties show the time as interval added to the start of the current day, in minutes. Thus a startTime value of 300 means the timetable starts 5 hours (5*60 min.) after midnight of the respective day:

    // set the start time to 8:00 AM
    calendar.timetableSettings.startTime = 480;
    // set the end time to 18:00 PM
    calendar.timetableSettings.endTime = 1020;

    III. The Custom Form

    We don’t want to use the standard form for creating appointments. We will create a custom one, you can see the difference between them at this image:

    Ski School Scheduler

    The left one is the custom form while to the right you can see the standard New Appointment form for calendar events.

    The custom form for creating and editing ski lessons derives from the BaseForm class. Here is its constructor:

    var SkiStudentForm = function (calendar, item, type)
    {
        p.BaseForm.call(this, calendar, item);
    
        this._id = "SkiStudentForm";
        this._type = type;
    	
        if(type == "new")
            this.headerText = "New Skiing Class";
        else
    	this.headerText = "Edit Skiing Class";
    
        this.levels = [
    { value: 0, text: "beginner" },
    { value: 1, text: "intermediate" },
    { value: 2, text: "advanced" }
    ]; }

    We want each form to have a reference to the Calendar, to the Item that was created and a type. The type is simply a string and we recognize two types: new and edit e.g. whether we create a new class or edit an existing one.

    Note that in the constructor we initialize a new variable called levels, which will provide data for the combo box with options for the skiing level of the student.

    Then we call the prototype methods of the class and the constructor so we can initialize instances of SkiStudentForm:

    SkiStudentForm.prototype = Object.create(p.BaseForm.prototype);
    SkiStudentForm.prototype.constructor = SkiStudentForm;

    The two methods that are responsible for drawing the contents of a custom BaseForm and its buttons are drawContent and drawButtons

    We start with the drawContent method, where we create the first row:

    SkiStudentForm.prototype.drawContent = function ()
    {
        p.BaseForm.prototype.drawContent.call(this);
    
        var content = this.content;
    
        var row = this.row();
        row.className = "header-row";
        row.innerText = "From";
        content.appendChild(row);
    
        row = this.row();
        row.className = "data-row";
        row.innerHTML = this.item.startTime.toString("dddd, MMMM d,  HH:00", this.formatInfo);
        content.appendChild(row);
        ........................
    }

    We call the prototype of the drawContent method and we add a new row element. The row is an empty DIV. Then we add another row, this one contains a string. The string represents the start time of the Item .

    We create the combo box using the createDropDownList method. Before we create the combo box we add a new DIV with the label. Then we add another DIV and the dropDownList element to it:

    // create a drop-down list for status
    row = this.row();
    row.className = "header-row";
    row.innerHTML = "Level";
    content.appendChild(row);
    
    var control = this.createDropDownList({ id: "level", items: this.levels, initValue: this.item.tag, addEmptyValue: false });
    control.element.style.width = "200px";
    this.addControl(control);
    
    row = this.row();
    row.className = "input-row";
    row.appendChild(control.element);
    content.appendChild(row);

    The drawButtons method that we implement overrides the buttons of the BaseForm with new ones, styled as we want. Here the code for the Save button:

    // override BaseForm's drawButtons method to create form buttons
    SkiStudentForm.prototype.drawButtons = function ()
    {
        var thisObj = this;
    
        var btnSave = this.createButton(
    { id: "btnSave", text: "✔", events: {
    "click": function click(e) { return thisObj.onSaveButtonClick(e); } } }); btnSave.element.className = "form-button-save";

    We use the createButton method to create the button, give it an id and assign a text to it. We also indicate the the click event will be handled by an implementation of the default onSaveButtonClick event for BaseForm

    The Cancel button is the same, just the CSS styling for it is different. Both buttons use custom CSS class, which are assigned to them through the className property of HTML Dom elements. Here is the code for the appearance of the two buttons:

    .form-buttons
    {
    	color: #fff;
    	font-size: x-large;
    	text-align: center;
    	margin-top: 20px !important;
    }
    .form-button-save
    {
    	width: 80%;
    	padding: 10px;
    	background-color: #31bd41 !important;
    }
    .form-button-cancel
    {
    	width: 20%;
    	padding: 10px;
    	background-color: #ce0000 !important;
    }

    We create and render an instance of the form with the following lines of code:

    var form = new SkiStudentForm(sender, item, "new");
    form.showForm();

    Here we create the form from an event handler for the Calendar class – we will look at that in the next section.

    IV. Events

    We show the student appointment form when a selection of cells is make. In order to do this we handle the selectionEnd method of the Calendar class:

    // handle the selectionEnd event to show the custom form for item creation
    calendar.selectionEnd.addEventListener(handleSelectionEnd);
    function handleSelectionEnd(sender, args)
    {	
        // we create a new item with the selected start and end time
        var item = new p.Item();
        item.startTime = args.startTime;
        item.endTime = args.endTime;	
        item.tag = 0;	
    
        // create and show the custom form
        var form = new SkiStudentForm(sender, item, "new");
        form.showForm();
    }

    We create a new Item and we set its startTime and endTime to the start and end of the selected cell range. Then we use the current Calendar, which is provided as a sender, the newly created Item and “new” as type to create an instance of the SkiStudentForm and render it.

    What shall we do if we want to use the custom form to edin an existing appointment? We will handle the itemDoubleClick event of the Calendar and show the SkiStudentForm. In this case we will get the Item that we want to edit and provide it as a parameter to the SkiStudentForm instance. We also change the type to be “edit”:

    function handleItemDoubleClick(sender, args)
    {	
        // show the custom form with data from the clicked item
        var form = new SkiStudentForm(sender, args.item, "edit");
        form.showForm();
    }

    These were the most important parts of the ski school scheduler application. The application has a few more, which we did not mention here but you can check them in code. The complete code, together with the themes and libraries used is available at:

    Download the Ski School Scheduler Application

    You can post technical questions, comments and recommendations about MindFusion Scheduling for JavaScript at the library online forum.

    About Scheduling for JavaScript: MindFusion Js Scheduler is the right solution for all applications that need to render interactive timetables, rich event calendars, lists with appointments or resources. Fully responsive, highly customizable and easy to integrate, you can quickly program the JavaScript scheduling library according to your needs. The library supports a variety of export options, styling through themes, 6 calendar views and much more. Find out more at https://mindfusion.eu/javascript-scheduler.html

    The Different Ways to Style a Schedule

    In this blog post we will look at the different levels of sty‌ling the elements and items of a schedule made with a MindFusion scheduling library. In our sample we use the Java Scheduling Library, but the API members that we use and the cascading levels of styling a schedule are universal across all MindFusion Scheduling components.

    I. Top Level: Theme

    At the top level of styling you have themes. The scheduling library has a set of predefined themes: Light, Lila, Silver, Standard, Vista, Windows2013. You apply one of the predefined themes this way:

    calendar.setTheme(ThemeType.Vista);

    Here is what the calendar looks like styled with the vista theme:

    In JavaScript, the themes are defined in CSS styles and you must reference the desired file and set the name of the theme to the calendar instance. In the other libraries, they are built-in and usually are available as members of an enum.

    You have the option to create a custom theme, which you can save and apply this way:

    calendar.setCustomTheme(new MyTheme());

    Another way to apply the custom theme in Java Scheduling is:

    calendar.setCustomTheme(new MyTheme());

    Here is the look of the calendar with the custom theme:

    The custom theme has changed some of the colors, widened the header so that the week days could be seen and set some borders on the cells.

    Creating a custom Theme requires that you override a strict set of methods. They are the public members of the Theme class. You should override all of them. Among the methods that style the calendar for each view – getMonthRangeSettings getMonthSettings etc. You could override in detail only the method that is responsible for styling the view you would use – if it is only one. For the rest of the methods you could just write:

    private void initialize_MyTheme_ListViewSettings()
    {
    	_listViewSettings = super.createListViewSettings();
    }

    Every method in the Theme class must be dutifully implemented and all settings set. That comes from the fact that a Theme is the last and topmost styling instrument and it must know how to style any element that might not be explicitly styled down the tree.

    The online and offline documentations of the Java Scheduling library come with topics that list in details the styling settings for each of the predefined themes. Our advice is that you get the code of the Theme that looks closest to what you want to have as a structure and modify it.

    The sample project that you can download at the bottom of this post implements a custom Theme based on the Vista theme and lists all members in a theme that you must set with all details.

    II. View and Item Settings

    One level down the tree are the view settings properties. They are available for any view. You can access those settings with the getMonthSettings getMonthRangeSettings etc. methods. Each one of those methods returns the styling settings of a particular view. You should use the one that corresponds to the view you’ve chosen:

    //set the view to SingleMonth
    calendar.setCurrentView(CalendarView.SingleMonth);
    //get the styling settings for SingleMonth view
    calendar.getMonthSettings().getDaySettings().setTodayFillColor(Color.green);

    You can style the items, regardless of the view used, with the ItemSettings object:

    calendar.getItemSettings().setPadding(20);

    The *Settings properties define the appearance of items in terms of alignment, spacing, padding, shadow, date format. The coloring of the elements is left to Style instances. Thus, if you want to change the color of items, you will use:

    //customize just the items through the itemSettings field
    calendar.getItemSettings().setPadding(20);
    		
    Style itemStyle = new Style();
    itemStyle.setBrush(new SolidBrush(Color.white));
    itemStyle.setHeaderTextColor(Color.DARK_GRAY);		
    itemStyle.setHeaderTextShadowStyle(ShadowStyle.None);
    calendar.getItemSettings().setStyle(itemStyle);

    This styles all items on the calendar. For styling a particular item, you should use on of the methods listed underneath.

    Our calendar now has green header on the current day, the background of events is white and there is a bit of a padding added to the events.

    III. Using Events to Style Particular Items

    When you want to select items that you want to style based on some distinct characteristics, you can use events. In our sample we handle the itemCreated event, where we check if the start date of an appointment happens to be during the weekend:

    // Listen for item creation and for draw events
    calendar.addCalendarListener(new CalendarAdapter(){
    	//apply custom styling to selected items
    	public void itemCreated(ItemEvent e) {
    		onItemCreated(e);
    	}				
    });

    The Java Scheduler provides various events, which are accessible through a CalendarListener and CalendarAdapter instances. We handle the itemCreated event this way:

    //color in red events that are scheduled to start on weekends
    protected void onItemCreated(ItemEvent e) {
    
    	Item item = e.getItem();
    	if(item.getStartTime().getDayOfWeek() == DayOfWeek.Saturday || 
    		item.getStartTime().getDayOfWeek() == DayOfWeek.Sunday)
    		{
    			item.getStyle().setBrush(new SolidBrush(new Color(213, 28, 32)));
    			item.getStyle().setHeaderTextColor(Colors.White);
    			item.getPointedStyle().setBrush(new SolidBrush(new Color(100, 100, 100)));
    		}	
    }

    The ItemEvent class provides the item that was created and you can use the instance to apply any particular styling to the item.

    Here is our scheduler, which now colors the items on weekends in red:

    In JavaScript, the items have a special field that allows you to assign to them a custom CSS style that you’ve defined. The style will be applied to the particular item only. The field is called ‘cssClass’.

    IV. Custom Drawing

    When you need to style in a very unique way calendar elements and nothing else helps, you have the option to draw them the way you want. Custom drawing can be made for many parts of the calendar. The available elements are identified as members of the CustomDrawElements enumeration.

    You tell the control that you want to use custom drawing this way:

    //specify that we will use custom drawing	
    calendar.setCustomDraw(EnumSet.of(CustomDrawElements.CellContents));

    The custom drawing must be part of the draw method, which is also a member of CalendarListener:

    // Listen for item creation and for draw events
    calendar.addCalendarListener(new CalendarAdapter(){
    				
    			
    //add custom drawing to CellContents
    @Override()
    public void draw(CalendarDrawEvent e) {
    	onDraw(e);
    	} 
    			
    });

    The event handler method looks like this:

    //apply custom drawing to selected items
    private void onDraw(CalendarDrawEvent e)
    {
    	if (e.getElement() == CustomDrawElements.CellContents)
    	{
    		DateTime date = e.getDate();		
    		
    		//color in light yellow the background of the first 10 days of a month
    		if (date.getDay() < 11)
    		{
    			// Do the custom drawing
    			Rectangle2D bounds = new Rectangle2D.Double(
    			e.getBounds().getX(), e.getBounds().getY(),
    			e.getBounds().getWidth() - 1, e.getBounds().getHeight() - 1);
    			new AwtGraphics(e.getGraphics()).fillRectangle(Brushes.LightYellow, bounds);
    		}
    	}
    }

    The Calendar’s drawEvent class gives us useful methods to learn more about the item that is being drawn. In our case we want to draw the cell contents, so we check if draw was called for the cell contents, and if yes, we get the bounds of the element. We need the check, because draw is called for all elements that support custom drawing and we need to identify which one is drawn at the moment.

    Thanks to the custom drawing, the monthly schedule now has a light yellow background on the first ten days of the month:

    With this our review of the methods to style a schedule is finished. You can download the complete source code of the sample together with all MindFusion libraries used from this link:

    How to Style a Java Schedule: Download Project Source Code

    You can post questions about Mindusion Scheduling components at MindFusion online forums.

    About MindFusion Scheduling Components MindFusion Scheduling components are available for a variety of platforms for web, mobile and desktop programming. All of them include a robust feature set that includes 6 calendar views, predefined themes, various events, predefined forms for creating appointments and recurrence. The components are fully interactive, easy to customize and style and are the ideal choice for any application that needs to implement time management features. You can learn more about MindFusion Scheduling tools at https://mindfusion.eu/scheduling-pack.html.