Getting Directions

Goal: This guide will show you how to add directions functionality to your application. Users will be able to select an origin and destination, get a route between them, and step through the directions on the map. This step builds on the search and details UI from Step 3, introducing a new directions panel and integrating the MapsIndoors DirectionsService and DirectionsRenderer.

SDK Concepts Introduced:

Using the DirectionsService to calculate routes between locations.
Using the DirectionsRenderer to display and step through routes on the map.
Using directionsRenderer.setRoute() to display a calculated route on the map.
Using directionsRenderer.setStepIndex() to navigate to a specific step in the route.
Using directionsRenderer.nextStep() and directionsRenderer.previousStep() for step navigation.
Using directionsRenderer.getLegIndex() and directionsRenderer.getStepIndex() to track current position.

Prerequisites

Completion of Step 3: Show the Details. Your app should already support searching for locations and viewing details.
Your MapsIndoors API Key and Google Maps API Key should be correctly set up. We will continue using the demo API key 02c329e6777d431a88480a09 and venue ID dfea941bb36964e728df92d3d for this example.

Update index.html

Open your index.html file. Add a new directions panel inside the existing .panel container:

<!-- index.html -->
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>MapsIndoors</title>
    <link rel="stylesheet" href="style.css">
    <!-- Google Maps JavaScript API -->
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_GOOGLE_MAPS_API_KEY"></script>
    <script src="https://app.mapsindoors.com/mapsindoors/js/sdk/4.41.0/mapsindoors-4.41.0.js.gz"
            xintegrity="sha384-3lk3cwVPj5MpUyo5T605mB0PMHLLisIhNrSREQsQHjD9EXkHBjz9ETgopmTbfMDc"
            crossorigin="anonymous"></script>
</head>

<body>
    <div id="map"></div>
    <div class="panel">
        <div id="search-ui" class="flex-column">
            <input type="text" id="search-input" placeholder="Search for a location...">
            <ul id="search-results"></ul>
        </div>
        <div id="details-ui" class="hidden">
            <h3 id="details-name"></h3>
            <p id="details-description"></p>
            <button id="details-directions" class="details-button details-action-button">Get Directions</button>
            <button id="details-close" class="details-button">Close</button>
        </div>
        <div id="directions-ui" class="hidden flex-column">
            <h3>Directions</h3>
            <div class="directions-inputs">
                <input type="text" id="origin-input" placeholder="Choose origin...">
                <ul id="origin-results" class="directions-results-list"></ul>
                <input type="text" id="destination-input" placeholder="Choose destination..." disabled>
            </div>
            <button id="get-directions" class="details-button details-action-button">Show Route</button>
            <div class="directions-step-nav">
                <span id="step-indicator"></span>
                <button id="prev-step" class="details-button">Previous</button>
                <button id="next-step" class="details-button">Next</button>
            </div>
            <button id="directions-close" class="details-button">Close Directions</button>
        </div>
    </div>
    <script src="script.js"></script>
</body>
</html>

Explanation of index.html updates

The #details-ui panel now includes a "Get Directions" button, allowing users to open the directions panel for the selected location.
The #directions-ui panel is added to the .panel container. This new panel contains:
- Input fields for origin and destination.
- A button to get directions.
- Step navigation controls (step indicator, previous/next buttons).
- A close button for the directions panel.
All panels (#search-ui, #details-ui, #directions-ui) use consistent class and ID naming, and only one is visible at a time, managed by the show/hide functions in the JavaScript.

Update style.css

Add styles for the new directions UI elements:

/* style.css */

/* Use flexbox for the main layout */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden; /* Prevent scrollbars if map is full size */
    display: flex;
    flex-direction: column; /* Stack children vertically if needed later */
}

/* Style for the map container */
#map {
  /* Make map fill available space */
  flex-grow: 1;
  width: 100%; /* Make map fill width */
  margin: 0;
  padding: 0;
}

/* Style for the information panel container */
.panel {
    position: absolute; /* Position over the map */
    top: 10px; /* Distance from the top */
    left: 10px; /* Distance from the left */
    z-index: 10; /* Ensure it's above the map and other elements */
    background-color: white; /* White background for readability */
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2); /* Add a subtle shadow */
    max-height: 80%; /* Limits max-height to prevent overflow with details */
    overflow-y: auto; /* Add scroll if content exceeds max-height */
    border: 1px solid #ccc; /* Add border for clarity */
    width: 300px;
}

/* Class to apply flex display and column direction */
.flex-column {
    display: flex;
    flex-direction: column;
    gap: 10px; /* Space between elements */
}

/* Class to hide elements */
.hidden {
    display: none;
}

/* Style for the search input field */
#search-input {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

/* Style for the search results list */
#search-results {
    list-style: none; /* Remove default list bullets */
    padding: 0;
    margin: 0;
}

/* Style for individual search result items */
#search-results li {
    padding: 8px 0;
    cursor: pointer; /* Indicate clickable items */
    border-bottom: 1px solid #eee; /* Separator line */
}

/* Style for the last search result item (no bottom border) */
#search-results li:last-child {
    border-bottom: none;
}

/* Hover effect for search result items */
#search-results li:hover {
    background-color: #f0f0f0; /* Highlight on hover */
}

/* --- New Styles for Location Details UI elements --- */

/* Styles for the new UI wrappers within #search-container */
#search-ui,
#details-ui {
    width: 100%; /* Ensure they fill the container's width */
    /* display: flex and flex-direction are controlled by .flex-column-container class via JS */
}

/* Style for the location name in details */
#details-name {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.2rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 5px;
}

/* Style for the location description in details */
#details-description {
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: #555;
}

/* Style for general buttons within details */
.details-button {
     padding: 8px;
     border: none;
     border-radius: 4px;
     font-size: 0.9rem;
     cursor: pointer;
     transition: background-color 0.3s ease;
}

/* Specific style for the Close button */
#details-close {
    background-color: #ccc; /* Grey */
    color: #333;
}
 #details-close:hover {
     background-color: #bbb;
 }

/* Directions panel specific */
#directions-ui {
    width: 100%;
}
.directions-inputs {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 8px;
}
.directions-results-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 120px;
    overflow-y: auto;
}
.directions-results-list li {
    padding: 8px 0;
    cursor: pointer;
    border-bottom: 1px solid #eee;
}
.directions-results-list li:last-child {
    border-bottom: none;
}
.directions-results-list li:hover {
    background-color: #f0f0f0;
}

.directions-step-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

#step-indicator {
    grid-column: span 2;
}

Explanation of style.css updates

Styles for the new #directions-ui panel and its child elements are added:
- .directions-inputs styles the input fields and results list for selecting origin and destination.
- .directions-results-list styles the list of search results for the origin input.
- .directions-step-nav and #step-indicator style the step navigation controls.

Update script.js

Add the following logic for directions and UI state management.

// script.js

// Define options for the MapsIndoors Google Maps view
const mapViewOptions = {
    element: document.getElementById('map'),
    // Initial map center (MapsPeople - Austin Office example)
    center: { lng: -97.74204591828197, lat: 30.36022358949809 },
    // Initial zoom level
    zoom: 17,
    // Maximum zoom level
    maxZoom: 22
};

// Set the MapsIndoors API key
mapsindoors.MapsIndoors.setMapsIndoorsApiKey('YOUR_MAPSINDOORS_API_KEY'); // Replace with your MapsIndoors API key

// Create a new instance of the MapsIndoors Google Maps view
const mapViewInstance = new mapsindoors.mapView.GoogleMapsView(mapViewOptions);

// Create a new MapsIndoors instance, passing the map view
const mapsIndoorsInstance = new mapsindoors.MapsIndoors({
    mapView: mapViewInstance,
    // Set the venue ID to load the map for a specific venue
    venue: 'YOUR_MAPSINDOORS_VENUE_ID', // Replace with your actual venue ID
});

/** Floor Selector **/

// Create a new HTML div element to host the floor selector
const floorSelectorElement = document.createElement('div');

// Create a new FloorSelector instance, linking it to the HTML element and the main MapsIndoors instance.
new mapsindoors.FloorSelector(floorSelectorElement, mapsIndoorsInstance);

// Get the underlying Google Maps instance
const googleMapInstance = mapViewInstance.getMap();

// Add the floor selector HTML element to the Google Maps controls.
googleMapInstance.controls[google.maps.ControlPosition.TOP_RIGHT].push(floorSelectorElement);

/** Handle Location Clicks **/

// Function to handle clicks on MapsIndoors locations
function handleLocationClick(location) {
    if (location && location.id) {
        // Move the map to the selected location
        mapsIndoorsInstance.goTo(location);
        // Ensure that the map shows the correct floor
        mapsIndoorsInstance.setFloor(location.properties.floor);
        // Select the location on the map
        mapsIndoorsInstance.selectLocation(location);

        // Show the details UI for the clicked location
        showDetails(location);
    }
}

// Add an event listener to the MapsIndoors instance for click events on locations
mapsIndoorsInstance.on('click', handleLocationClick);

/** Search Functionality **/

// Get references to the search input and results list elements
const searchInputElement = document.getElementById('search-input');
const searchResultsElement = document.getElementById('search-results');

// Initially hide the search results list
searchResultsElement.classList.add('hidden');

// Add an event listener to the search input for 'input' events
// This calls the onSearch function every time the user types in the input field
searchInputElement.addEventListener('input', onSearch);

// Function to perform the search and update the results list and map highlighting
function onSearch() {
    // Get the current value from the search input
    const query = searchInputElement.value;
    // Get the current venue from the MapsIndoors instance
    const currentVenue = mapsIndoorsInstance.getVenue();

    // Clear map highlighting
    mapsIndoorsInstance.highlight();
    // Deselect any selected location
    mapsIndoorsInstance.deselectLocation();

    // Check if the query is too short (less than 3 characters) or empty
    if (query.length < 3) {
        // Hide the results list if the query is too short or empty
        searchResultsElement.classList.add('hidden');
        return; // Stop here
    }

    // Define search parameters with the current input value
    // Include the current venue name in the search parameters
    const searchParameters = { q: query, venue: currentVenue ? currentVenue.name : undefined };

    // Call the MapsIndoors LocationsService to get locations based on the search query
    mapsindoors.services.LocationsService.getLocations(searchParameters).then(locations => {
        // Clear previous search results
        searchResultsElement.innerHTML = null;

        // If no locations are found, display a "No results found" message
        if (locations.length === 0) {
            const noResultsItem = document.createElement('li');
            noResultsItem.textContent = 'No results found';
            searchResultsElement.appendChild(noResultsItem);
            // Ensure the results list is visible to show the "No results found" message
            searchResultsElement.classList.remove('hidden');
            return; // Stop here if no results
        }

        // Append new search results to the list
        locations.forEach(location => {
            const listElement = document.createElement('li');
            // Display the location name
            listElement.innerHTML = location.properties.name;
            // Store the location ID on the list item for easy access
            listElement.dataset.locationId = location.id;

            // Add a click event listener to each list item
            listElement.addEventListener('click', function () {
                // Call the handleLocationClick function when a location in the search results is clicked.
                handleLocationClick(location);
            });

            searchResultsElement.appendChild(listElement);
        });

        // Show the results list now that it has content
        searchResultsElement.classList.remove('hidden');

        // Filter map to only display search results by highlighting them
        mapsIndoorsInstance.highlight(locations.map(location => location.id));
    })
        .catch(error => {
            console.error("Error fetching locations:", error);
            const errorItem = document.createElement('li');
            errorItem.textContent = 'Error performing search.';
            searchResultsElement.appendChild(errorItem);
            searchResultsElement.classList.remove('hidden');
        });
}

/** UI state management **/

const searchUIElement = document.getElementById('search-ui');
const detailsUIElement = document.getElementById('details-ui');
const directionsUIElement = document.getElementById('directions-ui');

function showSearchUI() {
    hideDetailsUI();
    hideDirectionsUI(); // Ensure directions UI is hidden
    searchUIElement.classList.remove('hidden');
    searchInputElement.focus();
}

function showDetailsUI() {
    hideSearchUI();
    hideDirectionsUI(); // Ensure directions UI is hidden
    detailsUIElement.classList.remove('hidden');
}

function hideSearchUI() {
    searchUIElement.classList.add('hidden');
}

function hideDetailsUI() {
    detailsUIElement.classList.add('hidden');
}

function showDirectionsUI() {
    hideSearchUI();
    hideDetailsUI();

    directionsUIElement.classList.remove('hidden');
}

function hideDirectionsUI() {

    directionsUIElement.classList.add('hidden');
}

/** Location Details **/

// Get references to the static details view elements
const detailsNameElement = document.getElementById('details-name');
const detailsDescriptionElement = document.getElementById('details-description');
const detailsCloseButton = document.getElementById('details-close');

detailsCloseButton.addEventListener('click', () => {
    mapsIndoorsInstance.deselectLocation(); // Deselect any selected location
    showSearchUI();
});

// Variable to store the location currently shown in details
let currentDetailsLocation = null;

// Show the details of a location
function showDetails(location) {
    // Keep track of the currently selected location
    currentDetailsLocation = location;
    detailsNameElement.textContent = location.properties.name;
    detailsDescriptionElement.textContent = location.properties.description || 'No description available.';
    showDetailsUI();
}

// Initial call to set up the search UI when the page loads
showSearchUI();

/** Directions Functionality **/

// Handles origin/destination selection, route calculation, and step navigation
const originInputElement = document.getElementById('origin-input');
const originResultsElement = document.getElementById('origin-results');
const destinationInputElement = document.getElementById('destination-input');
const getDirectionsButton = document.getElementById('get-directions');
const prevStepButton = document.getElementById('prev-step');
const nextStepButton = document.getElementById('next-step');
const stepIndicator = document.getElementById('step-indicator');
const directionsCloseButton = document.getElementById('directions-close');

let selectedOrigin = null;
let selectedDestination = null;
let currentRoute = null;
let directionsRenderer = null;

// Reference the details-directions button defined in the HTML
const detailsDirectionsButton = document.getElementById('details-directions');

detailsDirectionsButton.addEventListener('click', () => {
    showDirectionsPanel(currentDetailsLocation);
});

detailsCloseButton.addEventListener('click', showSearchUI);

directionsCloseButton.addEventListener('click', () => {
    hideDirectionsUI();
    showDetailsUI();
    if (directionsRenderer) directionsRenderer.setVisible(false);
});

// Show the directions panel and reset state for a new route
function showDirectionsPanel(destinationLocation) {
    selectedOrigin = null;
    selectedDestination = destinationLocation;
    currentRoute = null;
    destinationInputElement.value = destinationLocation.properties.name;
    originInputElement.value = '';
    originResultsElement.innerHTML = '';
    hideSearchUI();
    hideDetailsUI();
    showDirectionsUI();
    stepIndicator.textContent = '';
}

// Search for origin locations as the user types
originInputElement.addEventListener('input', onOriginSearch);
function onOriginSearch() {
    const query = originInputElement.value;
    const currentVenue = mapsIndoorsInstance.getVenue();
    originResultsElement.innerHTML = '';
    if (query.length < 3) return;
    const searchParameters = { q: query, venue: currentVenue ? currentVenue.name : undefined };
    mapsindoors.services.LocationsService.getLocations(searchParameters).then(locations => {
        if (locations.length === 0) {
            const noResultsItem = document.createElement('li');
            noResultsItem.textContent = 'No results found';
            originResultsElement.appendChild(noResultsItem);
            return;
        }
        locations.forEach(location => {
            const listElement = document.createElement('li');
            listElement.textContent = location.properties.name;
            listElement.addEventListener('click', () => {
                selectedOrigin = location;
                originInputElement.value = location.properties.name;
                originResultsElement.innerHTML = '';
            });
            originResultsElement.appendChild(listElement);
        });
    });
}

// Calculate and display the route when both origin and destination are selected
getDirectionsButton.addEventListener('click', async () => {
    if (!selectedOrigin || !selectedDestination) {
        // Optionally, show an alert or update stepIndicator instead
        stepIndicator.textContent = 'Please select both origin and destination.';
        return;
    }
    // Use anchor property for LatLngLiteral (anchor is always a point)
    const origin = {
        lat: selectedOrigin.properties.anchor.coordinates[1],
        lng: selectedOrigin.properties.anchor.coordinates[0],
        floor: selectedOrigin.properties.floor
    };
    const destination = {
        lat: selectedDestination.properties.anchor.coordinates[1],
        lng: selectedDestination.properties.anchor.coordinates[0],
        floor: selectedDestination.properties.floor
    };
    const directionsService = new mapsindoors.services.DirectionsService();
    const route = await directionsService.getRoute({ origin, destination });
    currentRoute = route;
    if (directionsRenderer) {
        directionsRenderer.setVisible(false);
    }

    directionsRenderer = new mapsindoors.directions.DirectionsRenderer({
        mapsIndoors: mapsIndoorsInstance,
        fitBounds: true,
        strokeColor: '#4285f4',
        strokeWeight: 5
    });

    await directionsRenderer.setRoute(route);
    directionsRenderer.setStepIndex(0, 0);
    showCurrentStep();
});

// Update the step indicator and enable/disable navigation buttons
function showCurrentStep() {
    if (currentRoute?.legs?.length < 1) return;
    const currentLegIndex = directionsRenderer.getLegIndex();
    const currentStepIndex = directionsRenderer.getStepIndex();
    const legs = currentRoute.legs;
    const steps = legs[currentLegIndex].steps;
    if (steps.length === 0) {
        stepIndicator.textContent = '';
        return;
    }
    stepIndicator.textContent = `Leg ${currentLegIndex + 1} of ${legs.length}, Step ${currentStepIndex + 1} of ${steps.length}`;
    prevStepButton.disabled = currentLegIndex === 0 && currentStepIndex === 0;
    nextStepButton.disabled = currentLegIndex === legs.length - 1 && currentStepIndex === steps.length - 1;
}

// Step navigation event listeners
prevStepButton.addEventListener('click', () => {
    if (!directionsRenderer) {
        return;
    }
    directionsRenderer.previousStep();
    showCurrentStep();

});
nextStepButton.addEventListener('click', () => {
    if (!directionsRenderer) {
        return;
    }
    directionsRenderer.nextStep();
    showCurrentStep();
});

Explanation of script.js updates:

UI State Management:
- New constants like directionsUIElement are added to reference the new directions panel in the DOM.
- The existing UI state management functions (showSearchUI(), showDetailsUI()) are updated to explicitly hide the directionsUIElement.
- New functions showDirectionsUI() and hideDirectionsUI() are introduced to manage the visibility of the directions panel, ensuring it's mutually exclusive with the search and details panels.
- The "Get Directions" button (detailsDirectionsButton) in the details panel now has an event listener that calls showDirectionsPanel(), passing the currentDetailsLocation to pre-fill the destination.
- The directionsCloseButton listener is added to hide the directions UI, show the details UI, and make the directionsRenderer invisible when directions are closed, providing a clear exit path.
Location Click Handling:
- The script maintains the unified click handler pattern established in previous steps. The handleLocationClick function continues to serve as the central entry point for user interactions with locations, responding to both map POI clicks and search result clicks.
- This consistent pattern ensures that when a user clicks on a location (either on the map or in search results), the following actions always occur:
  - The map pans to the selected location using mapsIndoorsInstance.goTo(location)
  - The floor is set to the location's floor with mapsIndoorsInstance.setFloor(location.properties.floor)
  - The location is visually selected on the map using mapsIndoorsInstance.selectLocation(location)
  - The location details panel is shown via showDetails(location)
- This unified approach ensures a consistent user experience regardless of how locations are selected.
Directions Panel and Origin/Destination Selection:
- New DOM element references are established for directions-related UI elements: originInputElement, originResultsElement, destinationInputElement, getDirectionsButton, prevStepButton, nextStepButton, stepIndicator, and directionsCloseButton.
- State variables selectedOrigin, selectedDestination, currentRoute, and directionsRenderer are declared to manage the directions workflow state.
- The showDirectionsPanel(destinationLocation) function resets the directions state, pre-fills the destination input with the selected location's name, and shows the directions UI.
- An origin search is implemented with an input event listener on originInputElement, which calls the onOriginSearch() function. This function uses mapsindoors.services.LocationsService.getLocations() to search for origin locations, similar to the main search functionality.
Route Calculation:
- When the user clicks the "Show Route" button (getDirectionsButton), the script checks if both selectedOrigin and selectedDestination are set.
- It extracts coordinates and floor information from the location objects' properties.anchor and properties.floor.
- A new instance of mapsindoors.services.DirectionsService() is created.
- The getRoute() method is called with origin and destination parameters to calculate the route.
- The route is stored in the currentRoute variable for later reference.
Route Display and Step Navigation:
- Any existing directionsRenderer is hidden before creating a new one.
- A new mapsindoors.directions.DirectionsRenderer is instantiated with the mapsIndoorsInstance, fitBounds: true for automatic map adjustment, and styling options.
- The renderer is configured with the calculated route via directionsRenderer.setRoute(route).
- The renderer is set to display the first step of the first leg with directionsRenderer.setStepIndex(0, 0).
- The showCurrentStep() function updates the step indicator text and enables/disables the navigation buttons based on the current position in the route.
- Event listeners for the navigation buttons call directionsRenderer.previousStep() and directionsRenderer.nextStep() respectively, followed by showCurrentStep() to update the UI.
Workflow Integration:
- The script carefully integrates the directions functionality with the existing search and details features.
- The details panel now includes a "Get Directions" button that transitions to the directions workflow.
- The directions panel allows users to return to the details view via the close button.
- All three UI states (search, details, directions) are mutually exclusive, providing a clear and focused user interface.

These updates allow users to search for a location, view its details, and get step-by-step directions between two locations within your venue, all within a clear and interactive UI.

Expected Outcome

Users can search for a location, view its details, and click "Get Directions" to open the directions panel.
When the directions panel opens from the details view, the destination input is pre-filled with the selected location's name and is disabled.
The user can type in the origin input to search for and select an origin location.
After both origin and destination are selected, clicking "Show Route" calculates and displays the route on the map.
The map updates to show the full route, and the step navigation controls become active.
Users can use the "Previous" and "Next" buttons to step through the route, with the map highlighting the current step and the step-indicator updating accordingly.
Only one panel (search, details, or directions) is visible at a time.
Clicking the "Close Directions" button returns to the details panel and hides the route from the map.

Troubleshooting

If the route is not shown after clicking "Show Route", ensure both origin and destination are selected and that the locations have valid anchor coordinates.
If the map does not update, check for errors in the browser console and verify your API keys and venue ID.
If the UI panels do not switch as expected, ensure the show/hide functions are called correctly and that the correct classes are applied.

Last updated 7 months ago

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