Creating an Uber Clone - Part VII - Transcript.pdf

Creating an Uber Clone - Part VII
In this section we finally get to “the map” UI, I hope you followed the instructions before for configuring the map. If not please follow through with that if things don’t work
and if you don’t see the map or it acts funny check out with us in the online support forums. You can also check out the map section in the deep dive into mobile
development course which comes bundled.

Before we begin we need a class we discussed before in the maps module. The MapLayout, I didn’t change much as left it “as is”. Since it’s already available elsewhere I
won’t go into the full discussion here and go right into the form itself.

The Map
© Codename One 2017 all rights reserved
Before we proceed I'd like to highlight some subtle things in this screenshot and discuss what we will and will not do.

The Map
✦The hamburger menu button above
represents the side menu
✦The "Where to?" field is really a button
✦For now I'll just place one unmoving Taxi
and we'll deal with the positioning later on
✦The two icons on the bottom represent
historic rides which I'll hardcode for now
✦The bottom notice is something I won't
implement within the app
I won’t do the side menu right now but I will do it soon…

The "Where to?" field is really a button that leads to a diﬀerent UI. This UI is overlaid on top of the map so it is a part of this Form

I’ll position one taxi in a hardcoded location as part of the mockup

The icons at the bottom are historic rides, I’ll add two hardcoded historic rides for now

I won’t go into the notice at the bottom. It's possible but it would be non-trivial

public class MapForm extends Form {
private static final String MAP_JS_KEY = "AIza-------";
private Image square;
private Image dropShadow;
public MapForm() {
super(new LayeredLayout());
setScrollableY(false);
Display.getInstance().callSeriallyOnIdle(() -> {
dropShadow = LoginForm.squareShadow(getDisplayWidth(), 30,
convertToPixels(3), 0.40f);
});
setTransitionOutAnimator(CommonTransitions.createEmpty());
MapContainer mc = new MapContainer(MAP_JS_KEY);
mc.setShowMyLocation(true);
add(mc);
Container mapLayer = new Container();
mapLayer.setLayout(new MapLayout(mc, mapLayer));
add(mapLayer);
Coord telAviv = new Coord(32.072449, 34.778613);
mc.zoom(telAviv, mc.getMaxZoom() + 1);
Label car = new Label(Resources.getGlobalResources().
getImage("map-vehicle-icon-uberX.png"));
car.getAllStyles().setOpacity(140);
MapForm
Lets jump right into the code.

You need the JS key from Google Maps as explained in the map extension page. This must have a filled up value

public MapForm() {
});
add(mc);
add(mapLayer);
MapForm
We usually use BorderLayout which implicitly disables scrollability. LayeredLayout doesn't do that and the forms content pane is scrollable on the Y-axis by default

public MapForm() {
});
add(mc);
add(mapLayer);
MapForm
Notice we didn't use a thread here and instead used the callSeriallyOnIdle method. On the login Form I didn't use that because the animation might have prevented idle
from occurring. This shadow is used later on in the showNavigationToolbar method

public MapForm() {
});
add(mc);
add(mapLayer);
MapForm
The transitions in the main application are based on cover and the transition out will only be a problem

public MapForm() {
});
add(mc);
add(mapLayer);
MapForm
The map is on the lowest layer and everything is placed on top of it

public MapForm() {
});
add(mc);
add(mapLayer);
MapForm
This layer is on top of the map and uses the MapLayout. Here we will place the car and other landmarks we need

add(mapLayer);
mapLayer.add(telAviv, car);
square = Image.createImage(convertToPixels(0.7f),
convertToPixels(0.7f), 0xff000000);
Button whereTo = new Button("Where To?", square, "WhereTo");
whereTo.setGap(convertToPixels(3));
add(BoxLayout.encloseY(whereTo));
FloatingActionButton history1 = FloatingActionButton.createFAB(
FontImage.MATERIAL_HISTORY, "History");
TextArea history1Label = new TextArea("Mikve Yisrael Str...", 3, 4);
TextArea history2Label = new TextArea("Burgeranch", 3, 4);
history1Label.setUIID("HistoryLabel");
history1Label.setEditable(false);
MapForm
I place a car on top of the map in Tel Aviv. Notice that the car is just a label... I've set the opacity to 140 to match the translucent cars in the native app. Notice that the
`MapLayout` takes a `Coord` as a constraint so it can properly position the car…

add(mapLayer);
mapLayer.add(telAviv, car);
square = Image.createImage(convertToPixels(0.7f),
convertToPixels(0.7f), 0xff000000);
Button whereTo = new Button("Where To?", square, "WhereTo");
MapForm
This is the small square we place next to the "Where to?" button. I could have used a unicode value too but it wasn't available in all the fonts. Notice the "Where to?"
element is just a button as it moves us to a separate UI and isn't really a TextField

history1Label.setGrowByContent(false);
Container h1 = BoxLayout.encloseY(history1, history1Label);
h1.setLeadComponent(history1);
ScaleImageLabel gradient = new ScaleImageLabel(Resources.
getGlobalResources().getImage("gradient-overlay.png"));
gradient.setBackgroundType(Style.BACKGROUND_IMAGE_SCALED_FILL);
add(BorderLayout.south(gradient));
MapForm
The history buttons are FloatingActionButton instances that are customized in terms of styling. I used TextArea instead of SpanLabel because I wanted the history
element to act as a single component with lead component. Lead components can take over a hierarchy of several components and handle the events for everyone so in
this case a click on the text area below the history will trigger an event in the FloatingActionButton

MapForm
The bottom of the map has a gradient overlay that darkens the bottom. This is probably in place to make the history labels readable. I just generated a gradient image in
photoshop and placed it there

add(BorderLayout.south(FlowLayout.encloseCenter(h1, h2)));
}
@Override
protected void initGlobalToolbar() {
setToolbar(new Toolbar(true));
CommonCode.constructSideMenu(getToolbar());
}
}
MapForm
We do two important things here... We use the overlay toolbar which "floats" on top of the UI. We initialize the side menu which we will discuss soon…

That was a lot to cover but there is a lot more... We did mention 3 new styles above which isn't that much all things considered.

WhereTo
The WhereTo style has some subtle nuances such as dark gray text

WhereTo
The padding is large and obvious, I played with it a bit to get it right

WhereTo
The margin is special, we want some margin from the sides so it won’t touch them. We need a lot of margin from the top to leave room for the title area

WhereTo
The corners are rounded on the native widget, this is very subtle so I left it at 0.3 millimeters which should be very easy. It also has a shadow which is more obvious and
80 opacity

WhereTo
The font isn’t big just slightly bigger than normal but the typical light font

History
The History button is the round button on the bottom of the map leading to historic rides. It’s black on white but is implemented as a floating action button

HistoryLabel
So it derives from that and uses the border settings from the floating action button

HistoryLabel
The history label is the text element below which is technically a text area but acts as a label. The text color for this is black

HistoryLabel
While the padding is 2 millimeters on all sides except for the top where we want to be as close as possible to the floating action button which is already well padded

HistoryLabel
Margin is zero as usual

HistoryLabel
And the font is relatively small at 2.2 millimeters so we can fit multiple rides in the form

Creating an Uber Clone - Part VII - Transcript.pdf

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Creating an Uber Clone - Part VII - Transcript.pdf