From dfca5cb7fb318cdc5c009e62e29c30e8b6326614 Mon Sep 17 00:00:00 2001
From: Farid Mammadov <farid.mammadov8118@gmail.com>
Date: Wed, 20 Feb 2019 14:50:09 +0900
Subject: [PATCH] Shadow added to SpaceNavigationView, behaviour tested
 with/without bezier curve

---
 .idea/gradle.xml                              |   3 +
 .idea/misc.xml                                |  15 ++-
 .idea/modules.xml                             |   4 +-
 build.gradle                                  |   4 +-
 gradle/wrapper/gradle-wrapper.properties      |   4 +-
 .../spacenavigation/NavigationViewShadow.java | 115 ++++++++++++++++++
 .../spacenavigation/SpaceNavigationView.java  |  33 ++++-
 7 files changed, 170 insertions(+), 8 deletions(-)
 create mode 100644 spacelib/src/main/java/com/luseen/spacenavigation/NavigationViewShadow.java

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 5b95552..501ac57 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -3,6 +3,9 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <compositeConfiguration>
+          <compositeBuild compositeDefinitionSource="SCRIPT" />
+        </compositeConfiguration>
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index ba7052b..e8ee3d9 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -5,21 +5,32 @@
     <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
     <option name="myNullables">
       <value>
-        <list size="4">
+        <list size="10">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
           <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
           <item index="3" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+          <item index="4" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
+          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.Nullable" />
+          <item index="6" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNullable" />
+          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />
+          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
+          <item index="9" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
         </list>
       </value>
     </option>
     <option name="myNotNulls">
       <value>
-        <list size="4">
+        <list size="9">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
           <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
           <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+          <item index="4" class="java.lang.String" itemvalue="androidx.annotation.NonNull" />
+          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNonNull" />
+          <item index="6" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.NonNull" />
+          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullDecl" />
+          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullType" />
         </list>
       </value>
     </option>
diff --git a/.idea/modules.xml b/.idea/modules.xml
index b0d4ebb..ce5c6e5 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -3,8 +3,10 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/Sample/Sample.iml" filepath="$PROJECT_DIR$/Sample/Sample.iml" />
+      <module fileurl="file://$PROJECT_DIR$/Sample/Sample.iml" filepath="$PROJECT_DIR$/Sample/Sample.iml" />
+      <module fileurl="file://$PROJECT_DIR$/Space-Navigation-View.iml" filepath="$PROJECT_DIR$/Space-Navigation-View.iml" />
       <module fileurl="file://$PROJECT_DIR$/Space-Navigation-View-Fork.iml" filepath="$PROJECT_DIR$/Space-Navigation-View-Fork.iml" />
-      <module fileurl="file://$PROJECT_DIR$/Space-Navigation-View-Fork.iml" filepath="$PROJECT_DIR$/Space-Navigation-View-Fork.iml" />
+      <module fileurl="file://$PROJECT_DIR$/spacelib/spacelib.iml" filepath="$PROJECT_DIR$/spacelib/spacelib.iml" />
       <module fileurl="file://$PROJECT_DIR$/spacelib/spacelib.iml" filepath="$PROJECT_DIR$/spacelib/spacelib.iml" />
     </modules>
   </component>
diff --git a/build.gradle b/build.gradle
index 4099202..73ca4f7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,9 +2,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.3.0'
         classpath 'com.novoda:bintray-release:0.8.0'
     }
 }
@@ -12,6 +13,7 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 18d7b73..4984f57 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed Mar 14 18:44:51 IST 2018
+#Wed Feb 20 14:48:23 KST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
diff --git a/spacelib/src/main/java/com/luseen/spacenavigation/NavigationViewShadow.java b/spacelib/src/main/java/com/luseen/spacenavigation/NavigationViewShadow.java
new file mode 100644
index 0000000..fa179c5
--- /dev/null
+++ b/spacelib/src/main/java/com/luseen/spacenavigation/NavigationViewShadow.java
@@ -0,0 +1,115 @@
+package com.luseen.spacenavigation;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.support.v4.content.ContextCompat;
+import android.widget.RelativeLayout;
+
+@SuppressLint("ViewConstructor")
+public class NavigationViewShadow extends RelativeLayout {
+    private Paint paint;
+
+    private int bezierWidth, bezierHeight, navigationWidth;
+
+    private Context context;
+
+    private boolean isLinear=false;
+
+    int [] alphaArray = new int[]{25, 23, 18, 15, 13, 8, 5, 3};
+
+    NavigationViewShadow(Context context) {
+        super(context);
+        this.context = context;
+        paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        paint.setStrokeWidth(2);
+        paint.setAntiAlias(true);
+        paint.setStyle(Paint.Style.STROKE);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        setBackgroundColor(ContextCompat.getColor(context, R.color.space_transparent));
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        // translate canvas by shaow width (8 width of shadow). Otherwise canvas clips top part bezier curve
+        canvas.translate(0, 8);
+
+        for (int i = 0; i<8; i++){
+            /**
+             * Draw shadow
+             */
+            canvas.drawPath(drawPathWithOffset(alphaArray[i], i), paint);
+        }
+    }
+
+    private Path drawPathWithOffset(int alpha, int offset){
+
+        int offsettedBeizerHeight = bezierHeight - offset;
+
+        Path path = new Path();
+        /**
+         * Reset path before drawing
+         */
+        path.reset();
+
+        /**
+         * Set paint color to draw the path with
+         */
+        paint.setColor(Color.BLACK);
+
+
+        /**
+         * Set alpha to change opacity of path
+         */
+        paint.setAlpha(alpha);
+
+        /**
+         * Start point for drawing
+         */
+        path.moveTo(0, offsettedBeizerHeight);
+
+        /**
+         * Draw line over left main-content
+         */
+        path.lineTo((navigationWidth-bezierWidth)/2, offsettedBeizerHeight);
+
+        if(!isLinear){
+            /**
+             * Seth half path of bezier view
+             */
+            path.cubicTo(bezierWidth / 4+(navigationWidth-bezierWidth)/2, offsettedBeizerHeight, bezierWidth / 4+(navigationWidth-bezierWidth)/2, -offset, bezierWidth / 2+(navigationWidth-bezierWidth)/2, -offset);
+            /**
+             * Seth second part of bezier view
+             */
+            path.cubicTo((bezierWidth / 4) * 3 +(navigationWidth-bezierWidth)/2, -offset, (bezierWidth / 4) * 3 +(navigationWidth-bezierWidth)/2, offsettedBeizerHeight, bezierWidth+(navigationWidth-bezierWidth)/2, offsettedBeizerHeight);
+        }
+
+        /**
+         * Draw line over right main-content
+         */
+        path.lineTo(navigationWidth, offsettedBeizerHeight);
+
+        return path;
+    }
+
+    /**
+     * Build bezier view with given width and height
+     *
+     * @param bezierWidth  Given width
+     * @param bezierHeight Given height
+     * @param isLinear True, if curves are not needed
+     */
+    void build(int navigationWidth, int bezierWidth, int bezierHeight,boolean isLinear) {
+        this.navigationWidth = navigationWidth;
+        this.bezierWidth = bezierWidth;
+        this.bezierHeight = bezierHeight;
+        this.isLinear=isLinear;
+    }
+}
diff --git a/spacelib/src/main/java/com/luseen/spacenavigation/SpaceNavigationView.java b/spacelib/src/main/java/com/luseen/spacenavigation/SpaceNavigationView.java
index 7746b15..2db115a 100644
--- a/spacelib/src/main/java/com/luseen/spacenavigation/SpaceNavigationView.java
+++ b/spacelib/src/main/java/com/luseen/spacenavigation/SpaceNavigationView.java
@@ -73,6 +73,7 @@ public class SpaceNavigationView extends RelativeLayout {
     private final int centreContentWight = (int) getResources().getDimension(com.luseen.spacenavigation.R.dimen.centre_content_width);
     private final int itemContentWight = (int) getResources().getDimension(com.luseen.spacenavigation.R.dimen.item_content_width);
     private final int centreButtonSize = (int) getResources().getDimension(com.luseen.spacenavigation.R.dimen.space_centre_button_default_size);
+    private int spaceNavigationWidth;
     private List<SpaceItem> spaceItems = new ArrayList<>();
     private List<View> spaceItemList = new ArrayList<>();
     private List<RelativeLayout> badgeList = new ArrayList<>();
@@ -85,6 +86,7 @@ public class SpaceNavigationView extends RelativeLayout {
     private RelativeLayout centreBackgroundView;
     private LinearLayout leftContent, rightContent;
     private BezierView centreContent;
+    private NavigationViewShadow navigationViewBorderLine;
     private Typeface customFont;
     private Context context;
     private int spaceItemIconSize = NOT_DEFINED;
@@ -221,7 +223,8 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          */
         ViewGroup.LayoutParams params = getLayoutParams();
         params.width = ViewGroup.LayoutParams.MATCH_PARENT;
-        params.height = spaceNavigationHeight;
+        // width increase by 8 to allow shadow be visible, otherwise shadow will be clipped
+        params.height = spaceNavigationHeight+8;
         setBackgroundColor(ContextCompat.getColor(context, R.color.space_transparent));
         setLayoutParams(params);
     }
@@ -230,6 +233,8 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
     protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight) {
         super.onSizeChanged(width, height, oldWidth, oldHeight);
 
+        spaceNavigationWidth = width;
+
         /**
          * Restore current item index from savedInstance
          */
@@ -289,6 +294,7 @@ private void initAndAddViewsToMainView() {
         rightContent = new LinearLayout(context);
 
         centreContent = buildBezierView();
+        navigationViewBorderLine = buildBezierBorderline();
 
         centreButton = new CentreButton(context);
 
@@ -343,6 +349,13 @@ public boolean onLongClick(View v) {
         centreContentParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
         centreContentParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
 
+        /**
+         * Borderline params
+         */
+        LayoutParams borderLineParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, spaceNavigationHeight);
+        borderLineParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
+        borderLineParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
+
         /**
          * Centre Background View content size and position
          */
@@ -371,6 +384,11 @@ public boolean onLongClick(View v) {
          */
         setBackgroundColors();
 
+        /**
+         * Adding shadow first, so it appears under all views
+         */
+        addView(navigationViewBorderLine, borderLineParams);
+
         /**
          * Adding view to centreContent
          */
@@ -438,7 +456,7 @@ private void addSpaceItems(LinearLayout leftContent, LinearLayout rightContent)
                 targetWidth = contentWidth;
             }
 
-            RelativeLayout.LayoutParams textAndIconContainerParams = new RelativeLayout.LayoutParams(
+            LayoutParams textAndIconContainerParams = new LayoutParams(
                     targetWidth, mainContentHeight);
             RelativeLayout textAndIconContainer = (RelativeLayout) inflater.inflate(R.layout.space_item_view, this, false);
             textAndIconContainer.setLayoutParams(textAndIconContainerParams);
@@ -716,6 +734,17 @@ private BezierView buildBezierView() {
         return bezierView;
     }
 
+    /**
+     * Creating borderline with params
+     *
+     * @return created borderline view
+     */
+    private NavigationViewShadow buildBezierBorderline() {
+        NavigationViewShadow borderline = new NavigationViewShadow(context);
+        borderline.build(spaceNavigationWidth, centreContentWight, spaceNavigationHeight - mainContentHeight,isCentrePartLinear);
+        return borderline;
+    }
+
     /**
      * Throw Array Index Out Of Bounds Exception
      *