Action bar button layout changes.

Theme attribute added for spacing between action buttons. Action
buttons are now allowed to fill up to half of the total action bar's
width.

Change-Id: Iabbc67e695684529dfae9681d4d9580cd30839d0

api/current.xml

@@ -2088,6 +2088,17 @@
  visibility="public"
 >
 </field>
+<field name="actionButtonPadding"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="16843547"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="actionButtonStyle"
  type="int"
  transient="false"

core/java/android/view/ActionBarView.java

@@ -19,6 +19,7 @@ package android.view;
 import com.android.internal.R;
 import com.android.internal.view.menu.ActionMenu;
 import com.android.internal.view.menu.ActionMenuItem;
+import com.android.internal.view.menu.ActionMenuView;
 import com.android.internal.view.menu.MenuBuilder;
 
 import android.app.ActionBar;
@@ -85,7 +86,7 @@ public class ActionBarView extends ViewGroup {
     private boolean mShowMenu;
 
     private MenuBuilder mOptionsMenu;
-    private View mMenuView;
+    private ActionMenuView mMenuView;
     
     private ActionMenuItem mLogoNavItem;
     
@@ -186,7 +187,9 @@ public class ActionBarView extends ViewGroup {
         if (mMenuView != null) {
             removeView(mMenuView);
         }
-        final View menuView = builder.getMenuView(MenuBuilder.TYPE_ACTION_BUTTON, null);
+        final ActionMenuView menuView = (ActionMenuView) builder.getMenuView(
+                MenuBuilder.TYPE_ACTION_BUTTON, null);
+        mActionSpacing = menuView.getItemMargin();
         final LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
                 LayoutParams.MATCH_PARENT);
         menuView.setLayoutParams(layoutParams);
@@ -426,7 +429,7 @@ public class ActionBarView extends ViewGroup {
         
         if (mMenuView != null) {
             availableWidth = measureChildView(mMenuView, availableWidth,
-                    childSpecHeight, mActionSpacing);
+                    childSpecHeight, 0);
         }
         
         switch (mNavigationMode) {
@@ -497,9 +500,9 @@ public class ActionBarView extends ViewGroup {
 
         x = r - l - getPaddingRight();
 
-
         if (mMenuView != null) {
-            x -= positionChildInverse(mMenuView, x, y, contentHeight) + mActionSpacing;
+            x -= positionChildInverse(mMenuView, x + mActionSpacing, y, contentHeight)
+                    - mActionSpacing;
         }
     }
 

core/java/com/android/internal/view/menu/ActionMenuView.java

@@ -16,7 +16,10 @@
 package com.android.internal.view.menu;
 
 import android.content.Context;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
 import android.util.AttributeSet;
+import android.view.ViewGroup;
 import android.widget.LinearLayout;
 
 import java.util.ArrayList;
@@ -27,10 +30,11 @@ import java.util.ArrayList;
 public class ActionMenuView extends LinearLayout implements MenuBuilder.ItemInvoker, MenuView {
     private static final String TAG = "ActionMenuView";
     
-    // TODO: Make this a ViewConfiguration constant.
-    private static final int MAX_ACTION_ITEMS = 3;
-    
     private MenuBuilder mMenu;
+
+    private int mItemPadding;
+    private int mItemMargin;
+    private int mMaxItems;
     
     public ActionMenuView(Context context) {
         this(context, null);
@@ -38,6 +42,48 @@ public class ActionMenuView extends LinearLayout implements MenuBuilder.ItemInvo
     
     public ActionMenuView(Context context, AttributeSet attrs) {
         super(context, attrs);
+        
+        TypedArray a = context.obtainStyledAttributes(attrs,
+                com.android.internal.R.styleable.Theme);
+        mItemPadding = a.getDimensionPixelOffset(
+                com.android.internal.R.styleable.Theme_actionButtonPadding, 0);
+        mItemMargin = mItemPadding / 2;
+        a.recycle();
+        
+        final Resources res = getResources();
+        final int size = res.getDimensionPixelSize(com.android.internal.R.dimen.action_icon_size);
+        final int spaceAvailable = res.getDisplayMetrics().widthPixels / 2;
+        final int itemSpace = size + mItemPadding; 
+        
+        mMaxItems = spaceAvailable / (itemSpace > 0 ? itemSpace : 1);
+    }
+    
+    @Override
+    protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
+        if (p instanceof LayoutParams) {
+            LayoutParams lp = (LayoutParams) p;
+            return lp.leftMargin == mItemMargin && lp.rightMargin == mItemMargin &&
+                    lp.width == LayoutParams.WRAP_CONTENT && lp.height == LayoutParams.WRAP_CONTENT;
+        }
+        return false;
+    }
+    
+    @Override
+    protected LayoutParams generateDefaultLayoutParams() {
+        LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
+                LayoutParams.WRAP_CONTENT);
+        params.leftMargin = mItemMargin;
+        params.rightMargin = mItemMargin;
+        return params;
+    }
+    
+    @Override
+    protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
+        return generateDefaultLayoutParams();
+    }
+    
+    public int getItemMargin() {
+        return mItemMargin;
     }
 
     public boolean invokeItem(MenuItemImpl item) {
@@ -49,7 +95,7 @@ public class ActionMenuView extends LinearLayout implements MenuBuilder.ItemInvo
     }
 
     public void initialize(MenuBuilder menu, int menuType) {
-        menu.setMaxActionItems(MAX_ACTION_ITEMS);
+        menu.setMaxActionItems(mMaxItems);
         mMenu = menu;
         updateChildren(true);
     }

core/res/res/values/attrs.xml

@@ -438,6 +438,13 @@
         <!-- Default quickcontact badge style with large quickcontact window. -->
         <attr name="quickContactBadgeStyleSmallWindowLarge" format="reference" />
 
+        <!-- =================== -->
+        <!-- Action bar styles   -->
+        <!-- =================== -->
+        <eat-comment />
+        <!-- Default amount of padding to use between action buttons. -->
+        <attr name="actionButtonPadding" format="dimension" />
+
         <!-- =================== -->
         <!-- Preference styles   -->
         <!-- =================== -->

core/res/res/values/dimens.xml

@@ -25,6 +25,9 @@
     <!-- The standard size (both width and height) of an application icon that
          will be displayed in the app launcher and elsewhere. -->
     <dimen name="app_icon_size">48dip</dimen>
+    <!-- The standard size (both width and height) of an action icon that will
+         be displayed in application action bars. -->
+    <dimen name="action_icon_size">48dip</dimen>
     <dimen name="toast_y_offset">64dip</dimen>
     <!-- Height of the status bar -->
     <dimen name="status_bar_height">25dip</dimen>

core/res/res/values/public.xml

@@ -1298,6 +1298,7 @@
   <public type="attr" name="actionDropDownStyle" />
   <public type="attr" name="actionButtonStyle" />
   <public type="attr" name="showAsAction" />
+  <public type="attr" name="actionButtonPadding" />
 
   <public type="id" name="home" />
 

core/res/res/values/themes.xml

@@ -203,6 +203,9 @@
 
         <!-- Search widget styles -->
         <item name="searchWidgetCorpusItemBackground">@android:color/search_widget_corpus_item_background</item>
+
+        <!-- Action bar styles -->
+        <item name="actionButtonPadding">12dip</item>
     </style>
     
     <!-- Variant of the default (dark) theme with no title bar -->