| /* |
| * 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.annotation.NonNull; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.ColorFilter; |
| import android.graphics.Outline; |
| import android.graphics.PixelFormat; |
| 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 View mActionBarView; |
| private View mActionContextView; |
| |
| private Drawable mBackground; |
| private Drawable mStackedBackground; |
| private Drawable mSplitBackground; |
| private boolean mIsSplit; |
| private boolean mIsStacked; |
| private int mHeight; |
| |
| public ActionBarContainer(Context context) { |
| this(context, null); |
| } |
| |
| public ActionBarContainer(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| // Set a transparent background so that we project appropriately. |
| setBackground(new ActionBarBackgroundDrawable()); |
| |
| 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); |
| mHeight = a.getDimensionPixelSize(com.android.internal.R.styleable.ActionBar_height, -1); |
| |
| 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 = findViewById(com.android.internal.R.id.action_bar); |
| mActionContextView = findViewById(com.android.internal.R.id.action_context_bar); |
| } |
| |
| public void setPrimaryBackground(Drawable bg) { |
| if (mBackground != null) { |
| mBackground.setCallback(null); |
| unscheduleDrawable(mBackground); |
| } |
| mBackground = bg; |
| if (bg != null) { |
| bg.setCallback(this); |
| if (mActionBarView != null) { |
| mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(), |
| mActionBarView.getRight(), mActionBarView.getBottom()); |
| } |
| } |
| setWillNotDraw(mIsSplit ? mSplitBackground == null : |
| mBackground == null && mStackedBackground == null); |
| invalidate(); |
| } |
| |
| public void setStackedBackground(Drawable bg) { |
| if (mStackedBackground != null) { |
| mStackedBackground.setCallback(null); |
| unscheduleDrawable(mStackedBackground); |
| } |
| mStackedBackground = bg; |
| if (bg != null) { |
| bg.setCallback(this); |
| if ((mIsStacked && mStackedBackground != null)) { |
| mStackedBackground.setBounds(mTabContainer.getLeft(), mTabContainer.getTop(), |
| mTabContainer.getRight(), mTabContainer.getBottom()); |
| } |
| } |
| setWillNotDraw(mIsSplit ? mSplitBackground == null : |
| mBackground == null && mStackedBackground == null); |
| invalidate(); |
| } |
| |
| public void setSplitBackground(Drawable bg) { |
| if (mSplitBackground != null) { |
| mSplitBackground.setCallback(null); |
| unscheduleDrawable(mSplitBackground); |
| } |
| mSplitBackground = bg; |
| if (bg != null) { |
| bg.setCallback(this); |
| if (mIsSplit && mSplitBackground != null) { |
| mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight()); |
| } |
| } |
| setWillNotDraw(mIsSplit ? mSplitBackground == null : |
| mBackground == null && mStackedBackground == null); |
| invalidate(); |
| } |
| |
| @Override |
| public void setVisibility(int visibility) { |
| super.setVisibility(visibility); |
| final boolean isVisible = visibility == VISIBLE; |
| if (mBackground != null) mBackground.setVisible(isVisible, false); |
| if (mStackedBackground != null) mStackedBackground.setVisible(isVisible, false); |
| if (mSplitBackground != null) mSplitBackground.setVisible(isVisible, false); |
| } |
| |
| @Override |
| protected boolean verifyDrawable(@NonNull Drawable who) { |
| return (who == mBackground && !mIsSplit) || (who == mStackedBackground && mIsStacked) || |
| (who == mSplitBackground && mIsSplit) || super.verifyDrawable(who); |
| } |
| |
| @Override |
| protected void drawableStateChanged() { |
| super.drawableStateChanged(); |
| |
| final int[] state = getDrawableState(); |
| boolean changed = false; |
| |
| final Drawable background = mBackground; |
| if (background != null && background.isStateful()) { |
| changed |= background.setState(state); |
| } |
| |
| final Drawable stackedBackground = mStackedBackground; |
| if (stackedBackground != null && stackedBackground.isStateful()) { |
| changed |= stackedBackground.setState(state); |
| } |
| |
| final Drawable splitBackground = mSplitBackground; |
| if (splitBackground != null && splitBackground.isStateful()) { |
| changed |= splitBackground.setState(state); |
| } |
| |
| if (changed) { |
| invalidate(); |
| } |
| } |
| |
| @Override |
| public void jumpDrawablesToCurrentState() { |
| super.jumpDrawablesToCurrentState(); |
| if (mBackground != null) { |
| mBackground.jumpToCurrentState(); |
| } |
| if (mStackedBackground != null) { |
| mStackedBackground.jumpToCurrentState(); |
| } |
| if (mSplitBackground != null) { |
| mSplitBackground.jumpToCurrentState(); |
| } |
| } |
| |
| /** |
| * @hide |
| */ |
| @Override |
| public void onResolveDrawables(int layoutDirection) { |
| super.onResolveDrawables(layoutDirection); |
| if (mBackground != null) { |
| mBackground.setLayoutDirection(layoutDirection); |
| } |
| if (mStackedBackground != null) { |
| mStackedBackground.setLayoutDirection(layoutDirection); |
| } |
| if (mSplitBackground != null) { |
| mSplitBackground.setLayoutDirection(layoutDirection); |
| } |
| } |
| |
| /** |
| * 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 ActionMode startActionModeForChild( |
| View child, ActionMode.Callback callback, int type) { |
| if (type != ActionMode.TYPE_PRIMARY) { |
| return super.startActionModeForChild(child, callback, type); |
| } |
| return null; |
| } |
| |
| private static boolean isCollapsed(View view) { |
| return view == null || view.getVisibility() == GONE || view.getMeasuredHeight() == 0; |
| } |
| |
| private int getMeasuredHeightWithMargins(View view) { |
| final LayoutParams lp = (LayoutParams) view.getLayoutParams(); |
| return view.getMeasuredHeight() + lp.topMargin + lp.bottomMargin; |
| } |
| |
| @Override |
| public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| if (mActionBarView == null && |
| MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST && mHeight >= 0) { |
| heightMeasureSpec = MeasureSpec.makeMeasureSpec( |
| Math.min(mHeight, MeasureSpec.getSize(heightMeasureSpec)), MeasureSpec.AT_MOST); |
| } |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| if (mActionBarView == null) return; |
| |
| if (mTabContainer != null && mTabContainer.getVisibility() != GONE) { |
| int nonTabMaxHeight = 0; |
| final int childCount = getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| final View child = getChildAt(i); |
| if (child == mTabContainer) { |
| continue; |
| } |
| nonTabMaxHeight = Math.max(nonTabMaxHeight, isCollapsed(child) ? 0 : |
| getMeasuredHeightWithMargins(child)); |
| } |
| final int mode = MeasureSpec.getMode(heightMeasureSpec); |
| final int maxHeight = mode == MeasureSpec.AT_MOST ? |
| MeasureSpec.getSize(heightMeasureSpec) : Integer.MAX_VALUE; |
| setMeasuredDimension(getMeasuredWidth(), |
| Math.min(nonTabMaxHeight + getMeasuredHeightWithMargins(mTabContainer), |
| maxHeight)); |
| } |
| } |
| |
| @Override |
| public void onLayout(boolean changed, int l, int t, int r, int b) { |
| super.onLayout(changed, l, t, r, b); |
| |
| final View tabContainer = mTabContainer; |
| final boolean hasTabs = tabContainer != null && tabContainer.getVisibility() != GONE; |
| |
| if (tabContainer != null && tabContainer.getVisibility() != GONE) { |
| final int containerHeight = getMeasuredHeight(); |
| final LayoutParams lp = (LayoutParams) tabContainer.getLayoutParams(); |
| final int tabHeight = tabContainer.getMeasuredHeight(); |
| tabContainer.layout(l, containerHeight - tabHeight - lp.bottomMargin, r, |
| containerHeight - lp.bottomMargin); |
| } |
| |
| boolean needsInvalidate = false; |
| if (mIsSplit) { |
| if (mSplitBackground != null) { |
| mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight()); |
| needsInvalidate = true; |
| } |
| } else { |
| if (mBackground != null) { |
| if (mActionBarView.getVisibility() == View.VISIBLE) { |
| mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(), |
| mActionBarView.getRight(), mActionBarView.getBottom()); |
| } else if (mActionContextView != null && |
| mActionContextView.getVisibility() == View.VISIBLE) { |
| mBackground.setBounds(mActionContextView.getLeft(), mActionContextView.getTop(), |
| mActionContextView.getRight(), mActionContextView.getBottom()); |
| } else { |
| mBackground.setBounds(0, 0, 0, 0); |
| } |
| needsInvalidate = true; |
| } |
| mIsStacked = hasTabs; |
| if (hasTabs && mStackedBackground != null) { |
| mStackedBackground.setBounds(tabContainer.getLeft(), tabContainer.getTop(), |
| tabContainer.getRight(), tabContainer.getBottom()); |
| needsInvalidate = true; |
| } |
| } |
| |
| if (needsInvalidate) { |
| invalidate(); |
| } |
| } |
| |
| /** |
| * Dummy drawable so that we don't break background display lists and |
| * projection surfaces. |
| */ |
| private class ActionBarBackgroundDrawable extends Drawable { |
| @Override |
| public void draw(Canvas canvas) { |
| if (mIsSplit) { |
| if (mSplitBackground != null) { |
| mSplitBackground.draw(canvas); |
| } |
| } else { |
| if (mBackground != null) { |
| mBackground.draw(canvas); |
| } |
| if (mStackedBackground != null && mIsStacked) { |
| mStackedBackground.draw(canvas); |
| } |
| } |
| } |
| |
| @Override |
| public void getOutline(@NonNull Outline outline) { |
| if (mIsSplit) { |
| if (mSplitBackground != null) { |
| mSplitBackground.getOutline(outline); |
| } |
| } else { |
| // ignore the stacked background for shadow casting |
| if (mBackground != null) { |
| mBackground.getOutline(outline); |
| } |
| } |
| } |
| |
| @Override |
| public void setAlpha(int alpha) { |
| } |
| |
| @Override |
| public void setColorFilter(ColorFilter colorFilter) { |
| } |
| |
| @Override |
| public int getOpacity() { |
| if (mIsSplit) { |
| if (mSplitBackground != null |
| && mSplitBackground.getOpacity() == PixelFormat.OPAQUE) { |
| return PixelFormat.OPAQUE; |
| } |
| } else { |
| if (mIsStacked && (mStackedBackground == null |
| || mStackedBackground.getOpacity() != PixelFormat.OPAQUE)) { |
| return PixelFormat.UNKNOWN; |
| } |
| if (!isCollapsed(mActionBarView) && mBackground != null |
| && mBackground.getOpacity() == PixelFormat.OPAQUE) { |
| return PixelFormat.OPAQUE; |
| } |
| } |
| |
| return PixelFormat.UNKNOWN; |
| } |
| } |
| } |
