From b65897ba50c76e2110f5b5de455c14ca53d4069b Mon Sep 17 00:00:00 2001
From: Amith Yamasani <yamasani@google.com>
Date: Wed, 17 Nov 2010 13:49:27 -0800
Subject: Adjust preference activity margins and move the widget back to the
 right side.

Add a new "icon" field to Preference for adding icons to the left of the preference title.
Several screens such as BluetoothSettings and Accounts have added their own custom preferences
just to add an icon to the left. This makes it simpler going forward.
---
 core/java/android/preference/Preference.java | 59 +++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

(limited to 'core/java/android/preference')

diff --git a/core/java/android/preference/Preference.java b/core/java/android/preference/Preference.java
index 12b9f0c..e869f3f 100644
--- a/core/java/android/preference/Preference.java
+++ b/core/java/android/preference/Preference.java
@@ -22,6 +22,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -31,6 +32,7 @@ import android.view.AbsSavedState;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
 
@@ -52,6 +54,7 @@ import java.util.Set;
  * {@link SharedPreferences}. It is up to the subclass to decide how to store
  * the value.
  * 
+ * @attr ref android.R.styleable#Preference_icon
  * @attr ref android.R.styleable#Preference_key
  * @attr ref android.R.styleable#Preference_title
  * @attr ref android.R.styleable#Preference_summary
@@ -87,6 +90,11 @@ public class Preference implements Comparable<Preference>, OnDependencyChangeLis
     private int mOrder = DEFAULT_ORDER;
     private CharSequence mTitle;
     private CharSequence mSummary;
+    /**
+     * mIconResId is overridden by mIcon, if mIcon is specified.
+     */
+    private int mIconResId;
+    private Drawable mIcon;
     private String mKey;
     private Intent mIntent;
     private String mFragment;
@@ -197,6 +205,10 @@ public class Preference implements Comparable<Preference>, OnDependencyChangeLis
         for (int i = a.getIndexCount(); i >= 0; i--) {
             int attr = a.getIndex(i); 
             switch (attr) {
+                case com.android.internal.R.styleable.Preference_icon:
+                    mIconResId = a.getResourceId(attr, 0);
+                    break;
+
                 case com.android.internal.R.styleable.Preference_key:
                     mKey = a.getString(attr);
                     break;
@@ -499,11 +511,20 @@ public class Preference implements Comparable<Preference>, OnDependencyChangeLis
             }
         }
         
+        ImageView imageView = (ImageView) view.findViewById(com.android.internal.R.id.icon);
+        if (imageView != null && (mIconResId != 0 || mIcon != null)) {
+            if (mIcon == null) {
+                mIcon = getContext().getResources().getDrawable(mIconResId);
+            }
+            if (mIcon != null) {
+                imageView.setImageDrawable(mIcon);
+            }
+        }
         if (mShouldDisableView) {
             setEnabledStateOnViews(view, isEnabled());
         }
     }
-    
+
     /**
      * Makes sure the view (and any children) get the enabled state changed.
      */
@@ -587,6 +608,42 @@ public class Preference implements Comparable<Preference>, OnDependencyChangeLis
     }
 
     /**
+     * Sets the icon for this Preference with a Drawable. 
+     * This icon will be placed into the ID
+     * {@link android.R.id#icon} within the View created by
+     * {@link #onCreateView(ViewGroup)}.
+     * 
+     * @param icon The optional icon for this Preference.
+     */
+    public void setIcon(Drawable icon) {
+        if ((icon == null && mIcon != null) || (icon != null && mIcon != icon)) {
+            mIcon = icon;
+            notifyChanged();
+        }
+    }
+
+    /**
+     * Sets the icon for this Preference with a resource ID. 
+     * 
+     * @see #setIcon(Drawable)
+     * @param iconResId The icon as a resource ID.
+     */
+    public void setIcon(int iconResId) {
+        mIconResId = iconResId;
+        setIcon(mContext.getResources().getDrawable(iconResId));
+    }
+
+    /**
+     * Returns the icon of this Preference.
+     * 
+     * @return The icon.
+     * @see #setIcon(Drawable)
+     */
+    public Drawable getIcon() {
+        return mIcon;
+    }
+
+    /**
      * Returns the summary of this Preference.
      * 
      * @return The summary.
-- 
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