From 0a30457b6cbf55316dbe58fe4b7d328fdc616cdd Mon Sep 17 00:00:00 2001
From: Mateus Pires <mateusplpl@gmail.com>
Date: Thu, 2 Jul 2020 18:25:01 -0300
Subject: [PATCH] Add align and sidePadding attributes

---
 .../shawnlin/numberpicker/NumberPicker.java   | 27 ++++++++++++++++++-
 library/src/main/res/values/attrs.xml         |  6 +++++
 sample/src/main/res/layout/content_main.xml   |  8 ++++--
 3 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java b/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java
index ece35cc..e27baca 100644
--- a/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java
+++ b/library/src/main/java/com/shawnlin/numberpicker/NumberPicker.java
@@ -156,6 +156,11 @@ public class NumberPicker extends LinearLayout {
      */
     private static final int DEFAULT_TEXT_ALIGN = CENTER;
 
+    /**
+     * The default content alignment.
+     */
+    private static final int DEFAULT_ALIGN = CENTER;
+
     /**
      * The default color of text.
      */
@@ -630,6 +635,16 @@ private enum DividerType {
      */
     private ViewConfiguration mViewConfiguration;
 
+    /**
+     * The content alignment.
+     */
+    private int mAlign = DEFAULT_ALIGN;
+
+    /**
+     * The padding applied to the content when it's not centered (align is "left" or "right").
+     */
+    private int mSidePadding = 0;
+
     /**
      * Interface to listen for changes of the current value.
      */
@@ -814,6 +829,9 @@ public NumberPicker(Context context, AttributeSet attrs, int defStyle) {
                 R.styleable.NumberPicker_np_hideWheelUntilFocused, false);
         mAccessibilityDescriptionEnabled = attributes.getBoolean(
                 R.styleable.NumberPicker_np_accessibilityDescriptionEnabled, true);
+        mAlign = attributes.getInt(R.styleable.NumberPicker_np_align, mAlign);
+        mSidePadding = attributes.getDimensionPixelSize(
+                R.styleable.NumberPicker_np_sidePadding, mSidePadding);
 
         // By default LinearLayout that we extend is not drawn. This is
         // its draw() method is not called but dispatchDraw() is called
@@ -1767,7 +1785,14 @@ protected void onDraw(Canvas canvas) {
                 canvas.clipRect(mLeftDividerLeft, 0, mRightDividerRight, getBottom());
             }
         } else {
-            x = (getRight() - getLeft()) / 2f;
+            if (mAlign == LEFT) {
+                x = getLeft() + mSidePadding;
+            } else if (mAlign == RIGHT) {
+                x = getRight() - getMaxTextSize() - mSidePadding;
+            } else {
+                x = (getRight() - getLeft()) / 2f;
+            }
+
             y = mCurrentScrollOffset;
             if (mRealWheelItemCount < DEFAULT_WHEEL_ITEM_COUNT) {
                 canvas.clipRect(0, mTopDividerTop, getRight(), mBottomDividerBottom);
diff --git a/library/src/main/res/values/attrs.xml b/library/src/main/res/values/attrs.xml
index 3f2a4e0..cad2fe8 100644
--- a/library/src/main/res/values/attrs.xml
+++ b/library/src/main/res/values/attrs.xml
@@ -56,5 +56,11 @@
         <attr name="np_value" format="integer" />
         <attr name="np_wheelItemCount" format="integer" />
         <attr name="np_wrapSelectorWheel" format="boolean" />
+        <attr name="np_align" format="enum">
+            <enum name="right" value="0" />
+            <enum name="center" value="1" />
+            <enum name="left" value="2" />
+        </attr>
+        <attr name="np_sidePadding" format="dimension" />
     </declare-styleable>
 </resources>
diff --git a/sample/src/main/res/layout/content_main.xml b/sample/src/main/res/layout/content_main.xml
index 51fa40d..93e39e0 100644
--- a/sample/src/main/res/layout/content_main.xml
+++ b/sample/src/main/res/layout/content_main.xml
@@ -16,8 +16,11 @@
 
     <com.shawnlin.numberpicker.NumberPicker
         android:id="@+id/number_picker"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content" />
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:np_align="left"
+        app:np_sidePadding="20dp"
+        app:np_wheelItemCount="7" />
 
     <com.shawnlin.numberpicker.NumberPicker
         android:id="@+id/horizontal_number_picker"
@@ -40,6 +43,7 @@
         app:np_typeface="@string/roboto_light"
         app:np_fadingEdgeEnabled="false"
         app:np_wrapSelectorWheel="true"
+        android:visibility="gone"
         app:np_dividerType="underline" />
 
 </LinearLayout>