/*
* Copyright (C) 2010 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 com.android.internal.widget;
import android.app.ActionBar;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.ActionMode;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
/**
* This class acts as a container for the action bar view and action mode context views.
* It applies special styles as needed to help handle animated transitions between them.
* @hide
*/
public class ActionBarContainer extends FrameLayout {
private boolean mIsTransitioning;
private View mTabContainer;
private ActionBarView mActionBarView;
private Drawable mBackground;
private Drawable mStackedBackground;
private Drawable mSplitBackground;
private boolean mIsSplit;
private boolean mIsStacked;
public ActionBarContainer(Context context) {
this(context, null);
}
public ActionBarContainer(Context context, AttributeSet attrs) {
super(context, attrs);
setBackgroundDrawable(null);
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.ActionBar);
mBackground = a.getDrawable(com.android.internal.R.styleable.ActionBar_background);
mStackedBackground = a.getDrawable(
com.android.internal.R.styleable.ActionBar_backgroundStacked);
if (getId() == com.android.internal.R.id.split_action_bar) {
mIsSplit = true;
mSplitBackground = a.getDrawable(
com.android.internal.R.styleable.ActionBar_backgroundSplit);
}
a.recycle();
setWillNotDraw(mIsSplit ? mSplitBackground == null :
mBackground == null && mStackedBackground == null);
}
@Override
public void onFinishInflate() {
super.onFinishInflate();
mActionBarView = (ActionBarView) findViewById(com.android.internal.R.id.action_bar);
}
public void setPrimaryBackground(Drawable bg) {
mBackground = bg;
invalidate();
}
public void setStackedBackground(Drawable bg) {
mStackedBackground = bg;
invalidate();
}
public void setSplitBackground(Drawable bg) {
mSplitBackground = bg;
invalidate();
}
/**
* Set the action bar into a "transitioning" state. While transitioning
* the bar will block focus and touch from all of its descendants. This
* prevents the user from interacting with the bar while it is animating
* in or out.
*
* @param isTransitioning true if the bar is currently transitioning, false otherwise.
*/
public void setTransitioning(boolean isTransitioning) {
mIsTransitioning = isTransitioning;
setDescendantFocusability(isTransitioning ? FOCUS_BLOCK_DESCENDANTS
: FOCUS_AFTER_DESCENDANTS);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return mIsTransitioning || super.onInterceptTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
super.onTouchEvent(ev);
// An action bar always eats touch events.
return true;
}
@Override
public boolean onHoverEvent(MotionEvent ev) {
super.onHoverEvent(ev);
// An action bar always eats hover events.
return true;
}
public void setTabContainer(ScrollingTabContainerView tabView) {
if (mTabContainer != null) {
removeView(mTabContainer);
}
mTabContainer = tabView;
if (tabView != null) {
addView(tabView);
final ViewGroup.LayoutParams lp = tabView.getLayoutParams();
lp.width = LayoutParams.MATCH_PARENT;
lp.height = LayoutParams.WRAP_CONTENT;
tabView.setAllowCollapse(false);
}
}
public View getTabContainer() {
return mTabContainer;
}
@Override
public void onDraw(Canvas canvas) {
if (getWidth() == 0 || getHeight() == 0) {
return;
}
if (mIsSplit) {
if (mSplitBackground != null) mSplitBackground.draw(canvas);
} else {
if (mBackground != null) {
mBackground.draw(canvas);
}
if (mStackedBackground != null && mIsStacked) {
mStackedBackground.draw(canvas);
}
}
}
@Override
public ActionMode startActionModeForChild(View child, ActionMode.Callback callback) {
// No starting an action mode for an action bar child! (Where would it go?)
return null;
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mActionBarView == null) return;
final LayoutParams lp = (LayoutParams) mActionBarView.getLayoutParams();
final int actionBarViewHeight = mActionBarView.isCollapsed() ? 0 :
mActionBarView.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
if (mTabContainer != null && mTabContainer.getVisibility() != GONE) {
final int mode = MeasureSpec.getMode(heightMeasureSpec);
if (mode == MeasureSpec.AT_MOST) {
final int maxHeight = MeasureSpec.getSize(heightMeasureSpec);
setMeasuredDimension(getMeasuredWidth(),
Math.min(actionBarViewHeight + mTabContainer.getMeasuredHeight(),
maxHeight));
}
}
}
@Override
public void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
final boolean hasTabs = mTabContainer != null && mTabContainer.getVisibility() != GONE;
if (mTabContainer != null && mTabContainer.getVisibility() != GONE) {
final int containerHeight = getMeasuredHeight();
final int tabHeight = mTabContainer.getMeasuredHeight();
if ((mActionBarView.getDisplayOptions() & ActionBar.DISPLAY_SHOW_HOME) == 0) {
// Not showing home, put tabs on top.
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child == mTabContainer) continue;
if (!mActionBarView.isCollapsed()) {
child.offsetTopAndBottom(tabHeight);
}
}
mTabContainer.layout(l, 0, r, tabHeight);
} else {
mTabContainer.layout(l, containerHeight - tabHeight, r, containerHeight);
}
}
boolean needsInvalidate = false;
if (mIsSplit) {
if (mSplitBackground != null) {
mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight());
needsInvalidate = true;
}
} else {
if (mBackground != null) {
mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(),
mActionBarView.getRight(), mActionBarView.getBottom());
needsInvalidate = true;
}
if ((mIsStacked = hasTabs && mStackedBackground != null)) {
mStackedBackground.setBounds(mTabContainer.getLeft(), mTabContainer.getTop(),
mTabContainer.getRight(), mTabContainer.getBottom());
needsInvalidate = true;
}
}
if (needsInvalidate) {
invalidate();
}
}
}