Creating a Facebook Clone - Part XVI - Transcript.pdf

Creating a Facebook Clone - Part XV
The one last form we’ll work on in the mockup stage is the “New Post” Form

© Codename One 2017 all rights reserved
Right now I'll only support simple variations of the new post. I'll deal with image & video posting later. We will discuss some builtin styles and use HTML to display
formatted posts. This could allow for logic that implements things such as hashtags etc. in a future implementation.

public class NewPostForm extends Form {
private static final String[] POST_STYLES = {
"Label", "PostStyleHearts", "PostStyleHands", "PostStyleBlack",
"PostStyleRed", "PostStylePurple" };
public NewPostForm() {
super("Create Post", new BorderLayout());
Form current = getCurrentForm();
getToolbar().setBackCommand("Cancel",
Toolbar.BackCommandPolicy.
WHEN_USES_TITLE_OTHERWISE_ARROW,
e -> current.showBack());
getToolbar().addMaterialCommandToRightBar("",
FontImage.MATERIAL_DONE, e -> {});
User me = ServerAPI.me();
Container userSettings = BorderLayout.west(
new Label(me.getAvatar(6.5f), "HalfPaddedContainer"));
Button friends = new Button("Friends", "FriendCombo");
FontImage.setMaterialIcon(friends, FontImage.MATERIAL_PEOPLE);
userSettings.add(CENTER,
BoxLayout.encloseY(
new Label(me.fullName(), "MultiLine1"),
FlowLayout.encloseIn(friends)));
NewPostForm
Unlike the tabs we had until now the new post is a separate Form

BoxLayout.encloseY(
NewPostForm
The new post form includes styles that can be applied to the editing such as colors, background images etc.

BoxLayout.encloseY(
NewPostForm
The Form itself uses a BorderLayout to position a title area on the top and the rest of the UI over the entire screen

BoxLayout.encloseY(
NewPostForm
We save the current form before showing so we can go back to it

BoxLayout.encloseY(
NewPostForm
The avatar of the user goes on the left side of the title area followed by a button that should let us pick the right visibility mode for the post

BoxLayout.encloseY(
add(NORTH, userSettings);
TextArea post = new TextArea(3, 80);
post.setUIID("Label");
post.setGrowByContent(false);
Container postStyles = createPostStyles(post);
add(CENTER, LayeredLayout.encloseIn(
BorderLayout.north(post), BorderLayout.south(postStyles)));
setEditOnShow(post);
}
private Container createPostStyles(TextArea post) {
Container postStyles = new Container(BoxLayout.x());
postStyles.setScrollableX(true);
NewPostForm
The text of the post is just a standard TextArea with 3 rows and 80 columns. These are just hints for the preferred size of the component

BoxLayout.encloseY(
add(NORTH, userSettings);
TextArea post = new TextArea(3, 80);
post.setUIID("Label");
post.setGrowByContent(false);
Container postStyles = createPostStyles(post);
add(CENTER, LayeredLayout.encloseIn(
}
NewPostForm
If we input more than 3 rows the UI shouldn't grow, it might go on top of the the post styles container and it would be hard to diﬀerentiate a tap there from a text edit
gesture

}
int size = convertToPixels(8);
ButtonGroup bg = new ButtonGroup();
for(String s : POST_STYLES) {
Button postStyleButton = RadioButton.createToggle("", bg);
postStyleButton.setShowEvenIfBlank(true);
postStyleButton.setUIID(s);
Style stl = postStyleButton.getAllStyles();
stl.setBorder(RoundRectBorder.create());
stl.setPadding(3, 3, 3, 3);
stl.setMarginUnit(Style.UNIT_TYPE_DIPS);
stl.setMargin(1, 1, 1, 1);
int strokeColor = 0xffffff;
if(s.equals("Label")) {
stl.setBgTransparency(255);
stl.setBgColor(0xffffff);
strokeColor = 0;
}
postStyleButton.getPressedStyle().setBorder(RoundRectBorder.
create().strokeColor(strokeColor).
NewPostForm
This method creates the bar at the bottom of the screen,

When we click an entry in the bar the look changes and the post gets a new style

}
strokeColor = 0;
}
NewPostForm
The bar on the bottom of the form is an X axis box layout that's scrollable on the X axis

}
strokeColor = 0;
}
NewPostForm
Every icon is 8 millimeter in size

strokeColor = 0;
}
strokeOpacity(255).
stroke(0.5f, true));
postStyleButton.addActionListener(e -> changeStyle(post, s));
NewPostForm
We loop over the style types, the first style is "Label" which means an unstyled regular post

strokeColor = 0;
}
strokeOpacity(255).
NewPostForm
We create a radio toggle button for every style and set the style to the button

strokeColor = 0;
}
strokeOpacity(255).
NewPostForm
For the round corners we use the RoundRectBorder class and apply it manually as the style is designed for the entire entry

strokeColor = 0;
}
strokeOpacity(255).
NewPostForm
The first entry is a special case because text fields are sometimes transparent and so are labels

strokeColor = 0;
}
strokeOpacity(255).
postStyleButton.setPreferredSize(new Dimension(size, size));
postStyles.add(postStyleButton);
}
return postStyles;
}
NewPostForm
This implements the selected line border around an entry notice strokeColor can be black when surrounding the white label entry

strokeColor = 0;
}
strokeOpacity(255).
}
return postStyles;
}
NewPostForm
When the user clicks one of these radio buttons we invoke the changeStyle method

strokeColor = 0;
}
strokeOpacity(255).
}
return postStyles;
}
private void changeStyle(TextArea post, String s) {
post.setUIID(s);
post.getParent().setUIID("Container");
} else {
post.setUIID("PostStyleText");
post.getParent().setUIID(s);
}
revalidate();
}
}
NewPostForm
This brings us directly to the changeStyle method

strokeColor = 0;
}
strokeOpacity(255).
}
return postStyles;
}
post.setUIID(s);
} else {
}
revalidate();
}
}
NewPostForm
We need a special case for the first entry again as the behavior is slightly diﬀerent

strokeColor = 0;
}
strokeOpacity(255).
}
return postStyles;
}
post.setUIID(s);
} else {
}
revalidate();
}
}
NewPostForm
Separate UIID's are needed for the text area and the foreground

}
if(p.comments.size() > 0) {
stats.add(EAST, new Label(p.comments.size() + " comments",
"SmallLabel"));
}
return stats;
}
private Container createPostBar() {
Button avatar = new Button(ServerAPI.me().getAvatar(6.5f), "Label");
Button writePost = new Button("What's on your mind?",
"NewPostButton");
Button gallery = new Button("Photo", "GalleryButton");
FontImage.setMaterialIcon(gallery,
FontImage.MATERIAL_PHOTO_LIBRARY, 2.9f);
gallery.setTextPosition(BOTTOM);
Container c = BorderLayout.
centerEastWest(writePost, gallery, avatar);
c.setUIID("HalfPaddedContainer");
writePost.addActionListener(e -> new NewPostForm().show());
return c;
}
}
NewsfeedContainer
Before we go into the CSS we need one more thing to get this working. We need the following line in the NewsfeedContainer class in the createPostBar() method.

FriendCombo {
padding: 2mm;
margin: 1mm;
border-radius: 1mm;
border-width: 1px;
border-color: gray;
background: transparent;
color: gray;
font-family: "native:MainLight";
font-size: 2.6mm;
}
PostStyleBase {
background-color: black;
color: white;
padding: 3mm;
text-align: center;
font-family: "native:MainRegular";
font-size: 4.5mm;
}
PostStyleHearts {
cn1-derive: PostStyleBase;
background-image: url(images/hearts.jpg);
theme.css
There is quite a bit of CSS listed here, lets start with the simple stuﬀ. The FriendCombo. This is the gray round rect border that's applied to the visibility button. This
button determines if something is seen only by friends or is public

FriendCombo {
padding: 2mm;
margin: 1mm;
border-radius: 1mm;
border-width: 1px;
border-color: gray;
color: gray;
font-family: "native:MainLight";
font-size: 2.6mm;
}
PostStyleBase {
background-color: black;
color: white;
padding: 3mm;
text-align: center;
font-size: 4.5mm;
}
PostStyleHearts {
theme.css
This is the base UIID for every one of the UIID's listed in the array it isn't mentioned in the code but it's used in the CSS itself

color: white;
padding: 3mm;
text-align: center;
font-size: 4.5mm;
}
PostStyleHearts {
cn1-source-dpi: 0;
cn1-background-type: cn1-image-scaled-fill;
}
PostStyleHands {
background-image: url(images/hands.jpg);
cn1-source-dpi: 0;
cn1-background-type: cn1-image-scaled-fit;
background: #243761;
}
PostStyleBlack {
}
PostStyleRed {
background: red;
}
theme.css
Next we have the CSS definitions of the text styles. For this code we'll need hearts.jpg & hands.jpg that represent two of the designs.

Notice that all the styles here derive from PostStyleBase. I fill the hearts pattern into place even though it might make sense to tile it in some cases.

cn1-source-dpi: 0;
cn1-background-type: cn1-image-scaled-fill;
}
PostStyleHands {
cn1-source-dpi: 0;
}
PostStyleBlack {
}
PostStyleRed {
background: red;
}
PostStylePurple {
background: #c600ff;
}
PostStyleText {
color: white;
padding: 1.5mm;
theme.css
I scale to fit the hands entry, I'm not sure if it's the best way as even in the native app the hands disappear in some cases

cn1-source-dpi: 0;
}
PostStyleBlack {
}
PostStyleRed {
background: red;
}
PostStylePurple {
}
PostStyleText {
color: white;
padding: 1.5mm;
text-align: center;
font-size: 3.5mm;
}
theme.css
The rest of the styles are pretty trivial and should be easy to understand

cn1-source-dpi: 0;
}
PostStyleBlack {
}
PostStyleRed {
background: red;
}
PostStylePurple {
}
PostStyleText {
color: white;
padding: 1.5mm;
text-align: center;
font-size: 3.5mm;
}
theme.css
This is the style of the foreground text when another style is applied to the background. With that we are done. You should have a working mockup with a signup wizard
and the core functionality we will work on.

Creating a Facebook Clone - Part XVI - Transcript.pdf

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Creating a Facebook Clone - Part XVI - Transcript.pdf