Backport AlertDialog's button stacking
BUG: 19399462
Change-Id: I7d824085041c2cc9c1b16bbd2a9792e30a3ff70e
diff --git a/v7/appcompat/api/current.txt b/v7/appcompat/api/current.txt
index 257b10c..c97d647 100644
--- a/v7/appcompat/api/current.txt
+++ b/v7/appcompat/api/current.txt
@@ -368,6 +368,7 @@
field public static int alertDialogCenterButtons;
field public static int alertDialogStyle;
field public static int alertDialogTheme;
+ field public static int allowStacking;
field public static int arrowHeadLength;
field public static int arrowShaftLength;
field public static int autoCompleteTextViewStyle;
@@ -540,6 +541,7 @@
field public static int abc_action_bar_embed_tabs;
field public static int abc_action_bar_embed_tabs_pre_jb;
field public static int abc_action_bar_expanded_action_views_exclusive;
+ field public static int abc_allow_stacked_button_bar;
field public static int abc_config_actionMenuItemAllCaps;
field public static int abc_config_allowActionMenuItemTextWithIcon;
field public static int abc_config_closeDialogWhenTouchOutside;
@@ -839,6 +841,7 @@
field public static int showCustom;
field public static int showHome;
field public static int showTitle;
+ field public static int spacer;
field public static int split_action_bar;
field public static int src_atop;
field public static int src_in;
@@ -879,6 +882,7 @@
field public static int abc_action_mode_close_item_material;
field public static int abc_activity_chooser_view;
field public static int abc_activity_chooser_view_list_item;
+ field public static int abc_alert_dialog_button_bar_material;
field public static int abc_alert_dialog_material;
field public static int abc_dialog_title_material;
field public static int abc_expanded_menu_layout;
@@ -1291,6 +1295,7 @@
field public static final int[] AppCompatTextView;
field public static int AppCompatTextView_android_textAppearance;
field public static int AppCompatTextView_textAllCaps;
+ field public static int ButtonBarLayout_allowStacking;
field public static final int[] CompoundButton;
field public static int CompoundButton_android_button;
field public static int CompoundButton_buttonTint;
diff --git a/v7/appcompat/res/layout/abc_alert_dialog_button_bar_material.xml b/v7/appcompat/res/layout/abc_alert_dialog_button_bar_material.xml
new file mode 100644
index 0000000..4405707
--- /dev/null
+++ b/v7/appcompat/res/layout/abc_alert_dialog_button_bar_material.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright (C) 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<android.support.v7.internal.widget.ButtonBarLayout
+ xmlns:android="http://schemas.android.com/apk/res/android"
+ xmlns:app="http://schemas.android.com/apk/res-auto"
+ android:id="@+id/buttonPanel"
+ android:layout_width="match_parent"
+ android:layout_height="wrap_content"
+ android:layoutDirection="locale"
+ android:orientation="horizontal"
+ android:paddingLeft="12dp"
+ android:paddingRight="12dp"
+ android:paddingTop="4dp"
+ android:paddingBottom="4dp"
+ android:gravity="bottom"
+ app:allowStacking="@bool/abc_allow_stacked_button_bar"
+ style="?attr/buttonBarStyle">
+
+ <Button
+ android:id="@android:id/button3"
+ style="?attr/buttonBarNeutralButtonStyle"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content" />
+
+ <android.support.v4.widget.Space
+ android:id="@+id/spacer"
+ android:layout_width="0dp"
+ android:layout_height="0dp"
+ android:layout_weight="1"
+ android:visibility="invisible" />
+
+ <Button
+ android:id="@android:id/button2"
+ style="?attr/buttonBarNegativeButtonStyle"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content" />
+
+ <Button
+ android:id="@android:id/button1"
+ style="?attr/buttonBarPositiveButtonStyle"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content" />
+
+</android.support.v7.internal.widget.ButtonBarLayout>
diff --git a/v7/appcompat/res/layout/abc_alert_dialog_material.xml b/v7/appcompat/res/layout/abc_alert_dialog_material.xml
index 9ba81fd..01ff885 100644
--- a/v7/appcompat/res/layout/abc_alert_dialog_material.xml
+++ b/v7/appcompat/res/layout/abc_alert_dialog_material.xml
@@ -108,41 +108,6 @@
android:layout_height="wrap_content"/>
</FrameLayout>
- <LinearLayout
- android:id="@+id/buttonPanel"
- style="?attr/buttonBarStyle"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:layoutDirection="locale"
- android:orientation="horizontal"
- android:paddingLeft="12dp"
- android:paddingRight="12dp"
- android:paddingTop="8dp"
- android:paddingBottom="8dp"
- android:gravity="bottom">
+ <include layout="@layout/abc_alert_dialog_button_bar_material" />
- <Button
- android:id="@android:id/button3"
- style="?attr/buttonBarNeutralButtonStyle"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"/>
-
- <android.support.v4.widget.Space
- android:layout_width="0dp"
- android:layout_height="0dp"
- android:layout_weight="1"
- android:visibility="invisible"/>
-
- <Button
- android:id="@android:id/button2"
- style="?attr/buttonBarNegativeButtonStyle"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"/>
-
- <Button
- android:id="@android:id/button1"
- style="?attr/buttonBarPositiveButtonStyle"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"/>
- </LinearLayout>
</LinearLayout>
\ No newline at end of file
diff --git a/v7/appcompat/res/values-h320dp/bools.xml b/v7/appcompat/res/values-h320dp/bools.xml
new file mode 100644
index 0000000..5576c18
--- /dev/null
+++ b/v7/appcompat/res/values-h320dp/bools.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<resources>
+ <bool name="abc_allow_stacked_button_bar">true</bool>
+</resources>
diff --git a/v7/appcompat/res/values/attrs.xml b/v7/appcompat/res/values/attrs.xml
index 040bea1..7f03ec6 100644
--- a/v7/appcompat/res/values/attrs.xml
+++ b/v7/appcompat/res/values/attrs.xml
@@ -943,4 +943,11 @@
<attr name="listItemLayout" format="reference" />
</declare-styleable>
+ <!-- @hide -->
+ <declare-styleable name="ButtonBarLayout">
+ <!-- Whether to automatically stack the buttons when there is not
+ enough space to lay them out side-by-side. -->
+ <attr name="allowStacking" format="boolean" />
+ </declare-styleable>
+
</resources>
diff --git a/v7/appcompat/res/values/bools.xml b/v7/appcompat/res/values/bools.xml
index 79a5035..3508cf3 100644
--- a/v7/appcompat/res/values/bools.xml
+++ b/v7/appcompat/res/values/bools.xml
@@ -21,4 +21,8 @@
<bool name="abc_action_bar_expanded_action_views_exclusive">true</bool>
<bool name="abc_config_showMenuShortcutsWhenKeyboardPresent">false</bool>
+
+ <!-- Whether to allow vertically stacked button bars. This is disabled for
+ configurations with a small (e.g. less than 320dp) screen height. -->
+ <bool name="abc_allow_stacked_button_bar">false</bool>
</resources>
diff --git a/v7/appcompat/src/android/support/v7/internal/widget/ButtonBarLayout.java b/v7/appcompat/src/android/support/v7/internal/widget/ButtonBarLayout.java
new file mode 100644
index 0000000..dd0044b
--- /dev/null
+++ b/v7/appcompat/src/android/support/v7/internal/widget/ButtonBarLayout.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.support.v7.internal.widget;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.support.v7.appcompat.R;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+
+/**
+ * An extension of LinearLayout that automatically switches to vertical
+ * orientation when it can't fit its child views horizontally.
+ *
+ * @hide
+ */
+public class ButtonBarLayout extends LinearLayout {
+
+ /** Whether the current configuration allows stacking. */
+ private boolean mAllowStacking;
+ private int mLastWidthSize = -1;
+
+ public ButtonBarLayout(Context context, AttributeSet attrs) {
+ super(context, attrs);
+ final TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ButtonBarLayout);
+ mAllowStacking = ta.getBoolean(R.styleable.ButtonBarLayout_allowStacking, false);
+ ta.recycle();
+ }
+
+ public void setAllowStacking(boolean allowStacking) {
+ if (mAllowStacking != allowStacking) {
+ mAllowStacking = allowStacking;
+ if (!mAllowStacking && getOrientation() == LinearLayout.VERTICAL) {
+ setStacked(false);
+ }
+ requestLayout();
+ }
+ }
+
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
+ if (mAllowStacking) {
+ if (widthSize > mLastWidthSize && isStacked()) {
+ // We're being measured wider this time, try un-stacking.
+ setStacked(false);
+ }
+ mLastWidthSize = widthSize;
+ }
+ boolean needsRemeasure = false;
+ // If we're not stacked, make sure the measure spec is AT_MOST rather
+ // than EXACTLY. This ensures that we'll still get TOO_SMALL so that we
+ // know to stack the buttons.
+ final int initialWidthMeasureSpec;
+ if (!isStacked() && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) {
+ initialWidthMeasureSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST);
+ // We'll need to remeasure again to fill excess space.
+ needsRemeasure = true;
+ } else {
+ initialWidthMeasureSpec = widthMeasureSpec;
+ }
+ super.onMeasure(initialWidthMeasureSpec, heightMeasureSpec);
+ if (mAllowStacking && !isStacked()) {
+ final int measuredWidth = getMeasuredWidthAndState();
+ final int measuredWidthState = measuredWidth & MEASURED_STATE_MASK;
+ if (measuredWidthState == MEASURED_STATE_TOO_SMALL) {
+ setStacked(true);
+ // Measure again in the new orientation.
+ needsRemeasure = true;
+ }
+ }
+ if (needsRemeasure) {
+ super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+ }
+ }
+
+ private void setStacked(boolean stacked) {
+ setOrientation(stacked ? LinearLayout.VERTICAL : LinearLayout.HORIZONTAL);
+ setGravity(stacked ? Gravity.RIGHT : Gravity.BOTTOM);
+ final View spacer = findViewById(R.id.spacer);
+ if (spacer != null) {
+ spacer.setVisibility(stacked ? View.GONE : View.INVISIBLE);
+ }
+ // Reverse the child order. This is specific to the Material button
+ // bar's layout XML and will probably not generalize.
+ final int childCount = getChildCount();
+ for (int i = childCount - 2; i >= 0; i--) {
+ bringChildToFront(getChildAt(i));
+ }
+ }
+
+ private boolean isStacked() {
+ return getOrientation() == LinearLayout.VERTICAL;
+ }
+}
\ No newline at end of file
