| /* |
| * 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 android.support.v7.widget; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.drawable.Drawable; |
| import android.os.Build; |
| import android.support.v7.appcompat.R; |
| import android.support.v7.view.ActionMode; |
| import android.util.AttributeSet; |
| 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 mContextView; |
| |
| Drawable mBackground; |
| Drawable mStackedBackground; |
| Drawable mSplitBackground; |
| boolean mIsSplit; |
| 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. |
| final Drawable bg = Build.VERSION.SDK_INT >= 21 |
| ? new ActionBarBackgroundDrawableV21(this) |
| : new ActionBarBackgroundDrawable(this); |
| setBackgroundDrawable(bg); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, |
| R.styleable.ActionBar); |
| mBackground = a.getDrawable(R.styleable.ActionBar_background); |
| mStackedBackground = a.getDrawable( |
| R.styleable.ActionBar_backgroundStacked); |
| mHeight = a.getDimensionPixelSize(R.styleable.ActionBar_height, -1); |
| |
| if (getId() == R.id.split_action_bar) { |
| mIsSplit = true; |
| mSplitBackground = a.getDrawable(R.styleable.ActionBar_backgroundSplit); |
| } |
| a.recycle(); |
| |
| setWillNotDraw(mIsSplit ? mSplitBackground == null : |
| mBackground == null && mStackedBackground == null); |
| } |
| |
| @Override |
| public void onFinishInflate() { |
| super.onFinishInflate(); |
| mActionBarView = findViewById(R.id.action_bar); |
| mContextView = findViewById(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(Drawable who) { |
| return (who == mBackground && !mIsSplit) || (who == mStackedBackground && mIsStacked) || |
| (who == mSplitBackground && mIsSplit) || super.verifyDrawable(who); |
| } |
| |
| @Override |
| protected void drawableStateChanged() { |
| super.drawableStateChanged(); |
| if (mBackground != null && mBackground.isStateful()) { |
| mBackground.setState(getDrawableState()); |
| } |
| if (mStackedBackground != null && mStackedBackground.isStateful()) { |
| mStackedBackground.setState(getDrawableState()); |
| } |
| if (mSplitBackground != null && mSplitBackground.isStateful()) { |
| mSplitBackground.setState(getDrawableState()); |
| } |
| } |
| |
| public void jumpDrawablesToCurrentState() { |
| if (Build.VERSION.SDK_INT >= 11) { |
| super.jumpDrawablesToCurrentState(); |
| if (mBackground != null) { |
| mBackground.jumpToCurrentState(); |
| } |
| if (mStackedBackground != null) { |
| mStackedBackground.jumpToCurrentState(); |
| } |
| if (mSplitBackground != null) { |
| mSplitBackground.jumpToCurrentState(); |
| } |
| } |
| } |
| |
| /** |
| * 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; |
| } |
| |
| 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) { |
| // No starting an action mode for an action bar child! (Where would it go?) |
| return null; |
| } |
| |
| @Override |
| public android.view.ActionMode startActionModeForChild(View originalView, |
| android.view.ActionMode.Callback callback) { |
| return null; |
| } |
| |
| private 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; |
| |
| final int mode = MeasureSpec.getMode(heightMeasureSpec); |
| if (mTabContainer != null && mTabContainer.getVisibility() != GONE |
| && mode != MeasureSpec.EXACTLY) { |
| final int topMarginForTabs; |
| if (!isCollapsed(mActionBarView)) { |
| topMarginForTabs = getMeasuredHeightWithMargins(mActionBarView); |
| } else if (!isCollapsed(mContextView)) { |
| topMarginForTabs = getMeasuredHeightWithMargins(mContextView); |
| } else { |
| topMarginForTabs = 0; |
| } |
| final int maxHeight = mode == MeasureSpec.AT_MOST ? |
| MeasureSpec.getSize(heightMeasureSpec) : Integer.MAX_VALUE; |
| setMeasuredDimension(getMeasuredWidth(), |
| Math.min(topMarginForTabs + 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 (mContextView != null && |
| mContextView.getVisibility() == View.VISIBLE) { |
| mBackground.setBounds(mContextView.getLeft(), mContextView.getTop(), |
| mContextView.getRight(), mContextView.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(); |
| } |
| } |
| } |
