Merge pull request #148 from TouchInstinct/loading-view

added loading view

views/build.gradle

@@ -1,10 +1,19 @@
 apply from: "../android-configs/lib-config.gradle"
+apply plugin: 'kotlin-android'
+
+android {
+    buildFeatures {
+        viewBinding true
+    }
+}
 
 dependencies {
     implementation project(":utils")
+    implementation project(":kotlin-extensions")
     implementation project(":logging")
 
     implementation "com.google.android.material:material"
+    implementation "androidx.core:core-ktx"
 
     constraints {
         implementation("com.google.android.material:material") {
@@ -12,5 +21,19 @@ dependencies {
                 require '1.0.0'
             }
         }
+        implementation("androidx.core:core-ktx") {
+            version {
+                require '1.3.1'
+            }
+        }
+        implementation("org.jetbrains.kotlin:kotlin-stdlib") {
+            version {
+                require '1.3.0'
+            }
+        }
     }
 }
+
+repositories {
+    mavenCentral()
+}

views/src/main/java/ru/touchin/widget/LoadingContentView.kt

@@ -0,0 +1,69 @@
+package ru.touchin.widget
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import androidx.core.content.withStyledAttributes
+import ru.touchin.extensions.observable
+import ru.touchin.extensions.setOnRippleClickListener
+import ru.touchin.roboswag.components.views.R
+import ru.touchin.roboswag.components.views.databinding.ProgressViewBinding
+import kotlin.properties.Delegates
+
+//TODO make customizable views list and views style
+class LoadingContentView @JvmOverloads constructor(
+        context: Context,
+        attrs: AttributeSet? = null,
+        defStyleAttr: Int = 0
+) : Switcher(context, attrs) {
+
+    private val binding = ProgressViewBinding.inflate(LayoutInflater.from(context), this)
+
+    var state by Delegates.observable<State>(State.Loading, this::updateView)
+
+    init {
+        if (attrs != null) {
+            context.withStyledAttributes(attrs, R.styleable.LoadingContentView, defStyleAttr, 0) {
+                if (hasValue(R.styleable.LoadingContentView_stubText)) {
+                    setStubText(getString(R.styleable.LoadingContentView_stubText))
+                }
+            }
+        }
+    }
+
+    private fun setStubText(text: String?) {
+        binding.textStub.text = text
+    }
+
+    private fun updateView(state: State) {
+        if (state == State.ShowContent) {
+            getChildAt(childCount - 1)?.let { showChild(it.id) }
+        } else {
+            when (state) {
+                is State.Stub -> {
+                    setStubText(state.stubText)
+                    showChild(R.id.text_stub)
+                }
+                is State.Loading -> {
+                    showChild(R.id.progress_bar)
+                }
+                is State.Error -> {
+                    binding.apply {
+                        errorText.text = state.errorText
+                        errorRepeatButton.setOnRippleClickListener { state.action.invoke() }
+                        errorRepeatButton.text = state.repeatButtonText
+                        showChild(R.id.error_with_repeat)
+                    }
+                }
+            }
+        }
+    }
+
+    sealed class State {
+        object ShowContent : State()
+        data class Stub(val stubText: String) : State()
+        object Loading : State()
+        data class Error(val action: () -> Unit, val errorText: String, val repeatButtonText: String) : State()
+    }
+
+}

views/src/main/res/drawable/light_button_background.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="220dp"
+    android:height="50dp"
+    android:viewportWidth="220"
+    android:viewportHeight="50">
+    <path
+        android:pathData="M8 0h204a8 8 0 0 1 8 8v34a8 8 0 0 1-8 8H8a8 8 0 0 1-8-8V8a8 8 0 0 1 8-8z"
+        android:fillColor="#F2F2F7" />
+</vector>

views/src/main/res/layout/progress_view.xml

@@ -0,0 +1,64 @@
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@android:color/white">
+
+    <ProgressBar
+        android:id="@+id/progress_bar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminateTint="@color/loadingContentViewProgressBar" />
+
+    <LinearLayout
+        android:id="@+id/error_with_repeat"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/error_text"
+            style="@style/Text.Regular"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="32dp"
+            android:layout_marginEnd="32dp"
+            android:gravity="center"
+            android:textColor="@color/loadingContentViewTextColor"
+            android:textSize="15sp"
+            tools:text="Error text" />
+
+        <TextView
+            android:id="@+id/error_repeat_button"
+            style="@style/Text.Medium"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:background="@drawable/light_button_background"
+            android:clickable="true"
+            android:focusable="true"
+            android:foreground="?attr/selectableItemBackgroundBorderless"
+            android:gravity="center"
+            android:textColor="@color/loadingContentViewButtonTextColor"
+            android:textSize="18sp"
+            tools:text="Повторить" />
+
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/text_stub"
+        style="@style/Text.Regular"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:layout_marginStart="32dp"
+        android:layout_marginEnd="32dp"
+        android:gravity="center"
+        android:textColor="@color/loadingContentViewTextColor"
+        android:textSize="15sp"
+        tools:text="Stub text" />
+
+</merge>
+

views/src/main/res/values/attrs.xml

@@ -30,4 +30,8 @@
         <attr name="defaultChild" format="reference"/>
     </declare-styleable>
 
+    <declare-styleable name="LoadingContentView">
+        <attr name="stubText" format="string"/>
+    </declare-styleable>
+
 </resources>

views/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="loadingContentViewProgressBar">#8D8EA6</color>
+    <color name="loadingContentViewTextColor">#999BBF</color>
+    <color name="loadingContentViewButtonTextColor">#141233</color>
+</resources>

views/src/main/res/values/styles.xml

@@ -4,4 +4,17 @@
         <item name="android:inAnimation">@android:anim/fade_in</item>
         <item name="android:outAnimation">@android:anim/fade_out</item>
     </style>
+
+    <style name="Text">
+        <item name="android:textColor">@android:color/white</item>
+    </style>
+
+    <style name="Text.Medium">
+        <item name="android:fontFamily">@font/roboto_medium</item>
+    </style>
+
+    <style name="Text.Regular">
+        <item name="android:fontFamily">@font/roboto</item>
+    </style>
+
 </resources>