A modular functional UI language for Android

When I run gen-idea, I get:

[FAILED     ] org.macroid#macroid_2.11;2.0.0-M3!macroid_2.11.jar:  (0ms)
...
[warn] ==== jcenter: tried
[warn]   http://jcenter.bintray.com/org/macroid/macroid_2.11/2.0.0-M3/macroid_2.11-2.0.0-M3.jar

Is this because sbt-idea is looking for a .jar instead of a .aar? How do I get it working? I know this isn't really a Macroid issue but I figured you would know a workaround.

(This is not an issue, but more like a comment and feedback) Maybe using support libraries is the recommended way to reach more devices. But requiring your users to stick with android.support.v4.Fragment when you can use a newer API (this is my case) seems a little bit restrictive.

I have a base trait for my views in which I call setContentView to set a layout. Then I have several subtraits that extend from the base trait in order to add certain layout elements.

Base trait

trait View[V <: IView, M <: AbstractViewModel[V]]
        extends ViewModelBaseActivity[V, M]
        with Contexts[Activity] { self: V ⇒
    def layout: Ui[android.view.ViewGroup]

    def onCreateView( state: Bundle ): Unit

    override def onCreate( state: Bundle ) = {
        super.onCreate( state )

        onCreateView( state )

        setContentView {
            getUi{
                layout
            }
        }

        setModelView( self )
    }
}

Subtrait:

trait Coordinator[V <: IView, M <: AbstractViewModel[V]]
        extends View[V, M]
        with Contexts[Activity] { self: V ⇒
    val coordinator = l[CoordinatorLayout]()

    override def onCreateView( state: Bundle ) = {
        coordinator <~ addViews(
            Seq(
                w[TextView] <~ text( "test" )
            )
        )
    }

    override val layout = coordinator
}

However when I create a new view which extends the Coordinator subtrait, there is no TextView displaying "test". It works when I do the layout manipulation directly in the base trait.

Added scalac flags that revealed many warnings. Migrated macros to macro-compat to deal with many of them. Configured tests using roboelectric and added simple test for Bundles.

I've been tinkering with type signatures for quite some time, and can't find a way to write this without relying on runUi (which if Ui is analogous to IO in Haskell, we should treat runUi as something to be avoided, same as unsafePerformIO in Haskell).

The specific use case is this: When the user clicks a button, we submit a form to a server, and depending on the result will either display a toast, or go to the next screen. The signatures are roughly:

def submitForm: Future[String \/ ResponseData] = {
  // form submission code irrelevant
}

def handleResponse(response: String \/ ResponseData): Ui[Unit] =
  response.map(goToNextScreen).valueOr(displayError)

def goToNextScreen(data: ResponseData): Ui[Unit] = Ui {
  // create intent and pass data as extras, details irrelevant
}

def displayError(message: String): Ui[Unit] =
  toast(message) <~ fry

Now ultimately On.click needs a Ui[Any], but given any asynchronous action, I have no way to convert from a Ui[Future[Ui[A]]] to a Ui[Future[A]]. The simplest solution would seem to be adding a method to Ui of a type that looks something like:

def ~~>[B, C](next: C => Ui[B])(implicit ev: A <:< Future[C]): Ui[Future[B]]

Which would let me write my code as

w[Button] <~ On.click(Ui(submitForm) ~~> handleResponse _)

For the record, my code is currently

Ui {
  submitForm().flatMapUi(handleResponse _ >>> runUi[Unit])
}

I can't seem to get Macroid to find the right LayoutParams constructor with Macroid 2.0.0-20140401 (trimmed version, I have other elements in this layout):

l[HorizontalLinearLayout] (
  w[Button] <~ text("Start") <~ wire(startButton) <~
    lp(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f) <~
    On.click(Ui(start()))
 )

Compilation fails with:

[error] XXX.scala:110: Could not find the appropriate LayoutParams constructor
[error]           w[Button] <~ text("Start") <~ wire(startButton) <~ lp(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f) <~ On.click(Ui(start())),
[error]                                                                ^

Maybe I'm not using it correctly, as the documentation and the starter are for 1.x.

This PR brings the ability to override the different handlers in the Android Listeners with several overrides (for instance: OnSeekBarChangeListener).

If this contribution looks good to you, in a potential next PR, we would propose replace the current On implementation for the equivalent UnitOn proposed here, and FuncOn for UnitFuncOn, even both could be named On and FuncOn. That means the UnitOn is equivalent to the current On, and in the other hand, UnitFuncOn is equivalent to FuncOn.

From 47Deg, we wish this contribution will be useful.

Please, @stanch , Could you review? Thanks!

Trying to go through library sources to see how it works in Idea gives me this sad screen:

It would be nice to publish sources + javadoc, if it wasn't before, or am I missing something obvious here?

it removes room for one to use other string interpolators, e.g. for formatting (f)

also, logX doesn't do anything special other than insert the variables. no reason to use string interp. and it looks ugly

logV"foo"() ? yuck :(

logV(f"$interp%02d") that's pretty reasonable (all other implicits for logtag, etc. are ok)

Hello, I'm playing with the macroid-starter sample project and trying to add a sample ListView. The code compiles properly but I get a runtime error:

03-18 21:33:14.956    9578-9578/com.example.macroid.starter E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.NoSuchMethodError: macroid.viewable.Listable.listAdapter
            at com.example.macroid.starter.MainActivity.onCreate(MainActivity.scala:45)    

The error is triggered by the last line of the code provided below:

package com.example.macroid.starter
// ...
// import macroid stuff
import macroid._
import macroid.FullDsl._
import macroid.contrib._
import macroid.viewable._
import scala.concurrent.ExecutionContext.Implicits.global
// ...
// mix in Contexts for Activity
class MainActivity extends Activity with Styles with Contexts[Activity] {
  // prepare a variable to hold our text view
  var cap = slot[TextView]

  override def onCreate(savedInstanceState: Bundle) = {
    super.onCreate(savedInstanceState)

    var textListable: Listable[String, TextView] = Listable.text {
      TextTweaks.large
    }
    var adapt = textListable.listAdapter( Seq("one", "two") )

I tried to disable proguard and I believe it's not triggered, but I got no improvement. Not sure if I'm doing something wrong or there's a bug in macroid (I noticed macroid-viewable was moved in the core project 10 days ago).

Any clue?

Android local m2repository

This line fails both on Mac OS X 10.9.2 and Windows 8.1 with cygwin (https://github.com/macroid/macroid/blob/v2/build.sbt#L18)

"Google Repository" at (new File(System.getenv("ANDROID_SDK_HOME")) / "extras" / "google" / "m2repository").getAbsolutePath

It is working in both Mac OS X and Windows with:

"Android Repository" at (new File(System.getenv("ANDROID_SDK_HOME")) / "extras" / "android" / "m2repository").getCanonicalFile.toURI.toString

When was the last time you updated your local Android SDK installation with $ android? (I need "extras" / "android" / "m2repository" instead of "extras" / "google" / "m2repository")

scalaz-core dependency

I think your code ultimately depends on "org.scalaz" % "scalaz-core_2.10" % "7.0.3" Is it possible to update to a more recent version scalaz-core? (What about 7.0.5 or even 7.1.0-M5?)

Apparently version 2.1.0 is not published anywhere. I was not able to find it, at least.

[info] Resolving org.macroid#macroid-viewable_2.11;2.1.0 ...
[warn]  module not found: org.macroid#macroid-viewable_2.11;2.1.0
[warn] ==== local: tried
[warn]   /home/rgomes/.ivy2/local/org.macroid/macroid-viewable_2.11/2.1.0/ivys/ivy.xml
[warn] ==== public: tried
[warn]   https://repo1.maven.org/maven2/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[warn] ==== local-preloaded-ivy: tried
[warn]   /home/rgomes/.sbt/preloaded/org.macroid/macroid-viewable_2.11/2.1.0/ivys/ivy.xml
[warn] ==== local-preloaded: tried
[warn]   file:////home/rgomes/.sbt/preloaded/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[warn] ==== google libraries: tried
[warn]   file:/home/rgomes/tools/sdk-tools-linux-4333796/extras/google/m2repository/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[warn] ==== android libraries: tried
[warn]   file:/home/rgomes/tools/sdk-tools-linux-4333796/extras/android/m2repository/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[warn] ==== sonatype-releases: tried
[warn]   https://oss.sonatype.org/content/repositories/releases/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[warn] ==== jcenter: tried
[warn]   http://jcenter.bintray.com/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[warn] ==== Sonatype OSS Releasess: tried
[warn]   https://oss.sonatype.org/content/repositories/releases/org/macroid/macroid-viewable_2.11/2.1.0/macroid-viewable_2.11-2.1.0.pom
[info] Resolving jline#jline;2.14.3 ...
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: org.macroid#macroid_2.11;2.1.0: not found
[warn]  :: org.macroid#macroid-viewable_2.11;2.1.0: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::

This is my build.sbt:

import android.Keys._
import android.Dependencies.{LibraryDependency, aar}

enablePlugins(AndroidApp)

platformTarget in Android := "android-22"

name := "example"

scalaVersion := "2.11.12"

resolvers ++= Seq(
  Resolver.sonatypeRepo("releases"),
  "jcenter" at "http://jcenter.bintray.com",
  "Sonatype OSS Releasess" at "https://oss.sonatype.org/content/repositories/releases"
)

javacOptions ++= Seq("-source", "1.7", "-target", "1.7")
scalacOptions ++= Seq("-feature", "-deprecation", "-target:jvm-1.7")

libraryDependencies ++= Seq(
  aar("org.macroid" %% "macroid" % "2.1.0"),
  aar("org.macroid" %% "macroid-viewable" % "2.1.0"),
  aar("com.android.support" % "support-v4" % "24.0.0")
)

proguardScala in Android := true

proguardOptions in Android ++= Seq(
  "-ignorewarnings",
  "-keep class scala.Dynamic"
)

Adding macroid 2.0 to a fresh project created with sbt-android 1.7.10 gen-android yields the following proguard issues. How does one fix them? Shouldn't there be somewhere a list with proguard options that need to be enabled for macroid to work?

[info] Collecting resources
[info] Performing full resource merge
[info] QueuedCruncher is using /opt/android-sdk/build-tools/27.0.2/aapt
[info] Processing resources
[info] QueuedCruncher is using /opt/android-sdk/build-tools/27.0.2/aapt
[info] Rebuilding all classes because R.java has changed
[info] Regenerating TR.scala because R.java has changed
[info] Formatting 1 Scala source in foo:compile ...
[info] Compiling 4 Scala sources and 3 Java sources to /home/wookietreiber/projects/apps/foo/target/scala-2.11/classes...
[info] Packaging /home/wookietreiber/projects/apps/foo/target/android/intermediates/classes.jar ...
[info] Packaging resources: resources-debug.ap_
[info] QueuedCruncher is using /opt/android-sdk/build-tools/27.0.2/aapt
[info] Done packaging.
[info] Finding dependency references for: com.android.support:support-core-ui:25.0.1
[info] Finding dependency references for: com.android.support:support-v4:25.0.1
[info] Finding dependency references for: com.android.support:support-compat:25.0.1
[info] Finding dependency references for: com.android.support:support-vector-drawable:24.0.0
[info] Finding dependency references for: com.android.support:animated-vector-drawable:24.0.0
[info] Finding dependency references for: org.macroid:macroid_2.11:2.0
[info] Finding dependency references for: com.android.support:appcompat-v7:24.0.0
[info] Finding dependency references for: com.android.support:support-core-utils:25.0.1
[info] Finding dependency references for: com.android.support:support-fragment:25.0.1
[info] Finding dependency references for: com.android.support:support-media-compat:25.0.1
[info] Finding dependency references for: com.android.support:support-core-ui:25.0.1
[info] Finding dependency references for: com.android.support:support-compat:25.0.1
[info] Finding dependency references for: com.android.support:support-core-utils:25.0.1
[info] Finding dependency references for: com.android.support:support-fragment:25.0.1
[info] Finding dependency references for: com.android.support:support-media-compat:25.0.1
[info] Finding dependency references for: org.typelevel:macro-compat_2.11:1.1.1:default (artifactId=macro-compat_2.11, project.packaging=jar.asc, project.version=1.1.1, pom.groupId=org.typelevel, groupId=org.typelevel, project.groupId=org.
typelevel, version=1.1.1, pom.version=1.1.1, project.artifactId=macro-compat_2.11, pom.artifactId=macro-compat_2.11)
[info] Finding dependency references for: com.android.support:support-annotations:25.0.1:default (artifactId=support-annotations, project.packaging=pom.md5, project.version=25.0.1, pom.groupId=com.android.support, groupId=com.android.suppo
rt, project.groupId=com.android.support, version=25.0.1, pom.version=25.0.1, project.artifactId=support-annotations, pom.artifactId=support-annotations)
[info] Finding dependency references for: classes.jar
ProGuard, version 5.0
ProGuard is released under the GNU General Public License. You therefore
must ensure that programs that link to it (android, ...)
carry the GNU General Public License as well. Alternatively, you can
apply for an exception with the author of ProGuard.
Reading input...
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-core-ui-25.0.1/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-v4-25.0.1/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-compat-25.0.1/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-vector-drawable-24.0.0/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-animated-vector-drawable-24.0.0/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/org.macroid-macroid_2.11-2.0/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-appcompat-v7-24.0.0/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-core-utils-25.0.1/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-fragment-25.0.1/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-media-compat-25.0.1/classes.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-core-ui-25.0.1/libs/internal_impl-25.0.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-compat-25.0.1/libs/internal_impl-25.0.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-core-utils-25.0.1/libs/internal_impl-25.0.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-fragment-25.0.1/libs/internal_impl-25.0.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.android/sbt/exploded-aars/com.android.support-support-media-compat-25.0.1/libs/internal_impl-25.0.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-xml_2.11/1.0.5/scala-xml_2.11-1.0.5.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.11.12/scala-compiler-2.11.12.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/typelevel/macro-compat_2.11/1.1.1/macro-compat_2.11-1.1.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-async_2.11/0.9.5/scala-async_2.11-0.9.5.jar] (filtered)
Reading program jar [/opt/android-sdk/extras/android/m2repository/com/android/support/support-annotations/25.0.1/support-annotations-25.0.1.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-parser-combinators_2.11/1.0.4/scala-parser-combinators_2.11-1.0.4.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.11.12/scala-reflect-2.11.12.jar] (filtered)
Reading program jar [/home/wookietreiber/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.11.12/scala-library-2.11.12.jar] (filtered)
Reading program jar [/home/wookietreiber/projects/apps/foo/target/android/intermediates/classes.jar] (filtered)
Reading library jar [/opt/android-sdk/platforms/android-27/android.jar]
Initializing...
Note: scala.tools.nsc.typechecker.TypeStrings$class calls 'Class.getEnclosingClass'
Warning: scala.async.internal.AsyncTransform$$typecreator3$1: can't find enclosing method 'scala.reflect.api.Trees$TreeApi startStateMachine$1(scala.async.internal.AsyncMacro,scala.reflect.api.TypeTags$WeakTypeTag,scala.reflect.api.Trees$ClassDefApi,scala.async.internal.ExprBuilder$AsyncBlock,scala.collection.immutable.List)' in program class scala.async.internal.AsyncTransform
Warning: scala.async.internal.LiveVariables$FindUseTraverser$1: can't find enclosing method 'scala.async.internal.LiveVariables$ReferencedFields$3 fieldsUsedIn$1(scala.async.internal.AsyncMacro,scala.async.internal.ExprBuilder$AsyncState,scala.collection.immutable.Set,scala.runtime.VolatileObjectRef)' in program class scala.async.internal.LiveVariables
Note: scala.tools.jline_embedded.OSvTerminal: can't find dynamically referenced class com.cloudius.util.Stty
Note: scala.tools.jline_embedded.console.ConsoleReader: can't find dynamically referenced class sun.misc.Signal
Note: scala.tools.jline_embedded.console.ConsoleReader: can't find dynamically referenced class sun.misc.SignalHandler
Note: scala.tools.jline_embedded.internal.TerminalLineSettings accesses a field 'INHERIT' dynamically
      Maybe this is library field 'android.util.LayoutDirection { int INHERIT; }'
      Maybe this is library field 'java.lang.ProcessBuilder$Redirect { java.lang.ProcessBuilder$Redirect INHERIT; }'
      Maybe this is library field 'java.lang.ProcessBuilder$Redirect$Type { java.lang.ProcessBuilder$Redirect$Type INHERIT; }'
Note: there were 1 classes trying to access enclosing classes using reflection.
      You should consider keeping the inner classes attributes
      (using '-keepattributes InnerClasses').
      (http://proguard.sourceforge.net/manual/troubleshooting.html#attributes)
Note: there were 3 unresolved dynamic references to classes or interfaces.
      You should check if you need to specify additional program jars.
      (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclass)
Note: there were 1 accesses to class members by means of introspection.
      You should consider explicitly keeping the mentioned class members
      (using '-keep' or '-keepclassmembers').
      (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclassmember)
Warning: there were 2 unresolved references to program class members.
         Your input classes appear to be inconsistent.
         You may need to recompile the code.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedprogramclassmember

We need to remove an element from the list adapter via onClick for a button that is a widget inside the row. Banging my head around different options but none is working. Ideally we should access a ListView and get adapter from it to remove item from it and trigger notification to the ListView that data is changed. But the problem is that we can't access ListView from within the Object that is inherited from SlottedListable

It might be useful to adapt the old Wart’s code to the new WartRemover release. I’ve just lost ~15 minutes because the compiler did not catch discarding Ui in a Ui… :smiley:

Something like that should be possible:

Tweak[SomeView](v ⇒
  v.subView1 <~ someTweak ~
  v.subView2 <~ someOtherTweak
)

… without any notion of Ui.

Currently, we have to do:

Tweak[SomeView](v ⇒
  (
    v.subView1 <~ someTweak ~
    v.subView2 <~ someOtherTweak
  ).get
)

For some reason a listener for CheckBox is named OnCheckedChangeListerer, while its method is onCheckedChanged—mind the last letter. :disappointed:

Perhaps, an exception should be added to EventTweakMacros for this particular case.