-converted project to Kotlin. Code can be shortened a lot, but requir…

…es some delicate work.

-fixed some time/date formatting related issues:
alamkanak#497
alamkanak#495 (but not fixed RTL alignment issue)
-created a new activity to demonstrate the paging of entire view (example: week by week snapping), based on this pull request:
Quivr#88

build.gradle

@@ -1,12 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext.kotlin_version = '1.2.41'
     repositories {
         jcenter()
         google()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.2.0-alpha13'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

library/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
 
 repositories {
     mavenCentral()
@@ -19,6 +21,7 @@ configurations {
 dependencies {
     compile 'com.android.support:appcompat-v7:27.1.1'
     javadocDeps 'com.android.support:appcompat-v7:27.1.1'
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }
 
 apply from: 'gradle-mvn-push.gradle'

library/gradle-mvn-push.gradle

@@ -18,7 +18,7 @@ apply plugin: 'maven'
 apply plugin: 'signing'
 
 def isReleaseBuild() {
-    return VERSION_NAME.contains("SNAPSHOT") == false
+    return !VERSION_NAME.contains("SNAPSHOT")
 }
 
 def getReleaseRepositoryUrl() {
@@ -112,4 +112,4 @@ afterEvaluate { project ->
         archives androidSourcesJar
         // archives androidJavadocsJar
     }
-}
+}

library/src/main/AndroidManifest.xml

@@ -1 +1 @@
-<manifest package="com.alamkanak.weekview"></manifest>
+<manifest package="com.alamkanak.weekview"/>

library/src/main/java/com/alamkanak/weekview/DateTimeInterpreter.kt

@@ -0,0 +1,12 @@
+package com.alamkanak.weekview
+
+import java.util.*
+
+/**
+ * Created by Raquib on 1/6/2015.
+ */
+interface DateTimeInterpreter {
+    fun interpretDate(date: Calendar): String
+
+    fun interpretTime(hour: Int, minutes: Int): String
+}

library/src/main/java/com/alamkanak/weekview/MonthLoader.kt

@@ -0,0 +1,30 @@
+package com.alamkanak.weekview
+
+import java.util.*
+
+class MonthLoader(var onMonthChangeListener: MonthChangeListener?) : WeekViewLoader {
+
+    override fun toWeekViewPeriodIndex(instance: Calendar): Double {
+        return (instance.get(Calendar.YEAR) * 12).toDouble() + instance.get(Calendar.MONTH).toDouble() + (instance.get(Calendar.DAY_OF_MONTH) - 1) / 30.0
+    }
+
+    override fun onLoad(periodIndex: Int): List<WeekViewEvent>? {
+        return onMonthChangeListener!!.onMonthChange(periodIndex / 12, periodIndex % 12 + 1)
+    }
+
+    interface MonthChangeListener {
+        /**
+         *
+         * Very important interface, it's the base to load events in the calendar.
+         * This method is called three times: once to load the previous month, once to load the next month and once to load the current month.
+         * **That's why you can have three times the same event at the same place if you mess up with the configuration**
+         *
+         * @param newYear  : year of the events required by the view.
+         * @param newMonth :
+         *
+         *month of the events required by the view **1 based (not like JAVA API) : January = 1 and December = 12**.
+         * @return a list of the events happening **during the specified month**.
+         */
+        fun onMonthChange(newYear: Int, newMonth: Int): List<WeekViewEvent>?
+    }
+}

library/src/main/java/com/alamkanak/weekview/TextColorPicker.kt

@@ -0,0 +1,10 @@
+package com.alamkanak.weekview
+
+import android.support.annotation.ColorInt
+
+interface TextColorPicker {
+
+    @ColorInt
+    fun getTextColor(event: WeekViewEvent): Int
+
+}