| /* |
| * 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 com.android.launcher3; |
| |
| import android.content.Context; |
| import android.graphics.Rect; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.widget.LinearLayout; |
| |
| /** |
| * A base container view, which supports resizing. |
| */ |
| public abstract class BaseContainerView extends LinearLayout implements Insettable { |
| |
| private final static String TAG = "BaseContainerView"; |
| |
| // The window insets |
| private Rect mInsets = new Rect(); |
| // The bounds of the search bar. Only the left, top, right are used to inset the |
| // search bar and the height is determined by the measurement of the layout |
| private Rect mFixedSearchBarBounds = new Rect(); |
| // The computed bounds of the search bar |
| private Rect mSearchBarBounds = new Rect(); |
| // The computed bounds of the container |
| protected Rect mContentBounds = new Rect(); |
| // The computed padding to apply to the container to achieve the container bounds |
| private Rect mContentPadding = new Rect(); |
| // The inset to apply to the edges and between the search bar and the container |
| private int mContainerBoundsInset; |
| private boolean mHasSearchBar; |
| |
| public BaseContainerView(Context context) { |
| this(context, null); |
| } |
| |
| public BaseContainerView(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public BaseContainerView(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| mContainerBoundsInset = getResources().getDimensionPixelSize(R.dimen.container_bounds_inset); |
| } |
| |
| @Override |
| final public void setInsets(Rect insets) { |
| mInsets.set(insets); |
| updateBackgroundAndPaddings(); |
| } |
| |
| protected void setHasSearchBar() { |
| mHasSearchBar = true; |
| } |
| |
| /** |
| * Sets the search bar bounds for this container view to match. |
| */ |
| final public void setSearchBarBounds(Rect bounds) { |
| if (LauncherAppState.isDogfoodBuild() && !isValidSearchBarBounds(bounds)) { |
| Log.e(TAG, "Invalid search bar bounds: " + bounds); |
| } |
| |
| mFixedSearchBarBounds.set(bounds); |
| |
| // Post the updates since they can trigger a relayout, and this call can be triggered from |
| // a layout pass itself. |
| post(new Runnable() { |
| @Override |
| public void run() { |
| updateBackgroundAndPaddings(); |
| } |
| }); |
| } |
| |
| /** |
| * Update the backgrounds and padding in response to a change in the bounds or insets. |
| */ |
| protected void updateBackgroundAndPaddings() { |
| Rect padding; |
| Rect searchBarBounds = new Rect(); |
| if (!isValidSearchBarBounds(mFixedSearchBarBounds)) { |
| // Use the default bounds |
| padding = new Rect(mInsets.left + mContainerBoundsInset, |
| (mHasSearchBar ? 0 : (mInsets.top + mContainerBoundsInset)), |
| mInsets.right + mContainerBoundsInset, |
| mInsets.bottom + mContainerBoundsInset); |
| |
| // Special case -- we have the search bar, but no specific bounds, so just give it |
| // the inset bounds without a height. |
| searchBarBounds.set(mInsets.left + mContainerBoundsInset, |
| mInsets.top + mContainerBoundsInset, |
| getMeasuredWidth() - (mInsets.right + mContainerBoundsInset), 0); |
| } else { |
| // Use the search bounds, if there is a search bar, the bounds will contain |
| // the offsets for the insets so we can ignore that |
| padding = new Rect(mFixedSearchBarBounds.left, |
| (mHasSearchBar ? 0 : (mInsets.top + mContainerBoundsInset)), |
| getMeasuredWidth() - mFixedSearchBarBounds.right, |
| mInsets.bottom + mContainerBoundsInset); |
| |
| // Use the search bounds |
| searchBarBounds.set(mFixedSearchBarBounds); |
| } |
| |
| // If either the computed container padding has changed, or the computed search bar bounds |
| // has changed, then notify the container |
| if (!padding.equals(mContentPadding) || !searchBarBounds.equals(mSearchBarBounds)) { |
| mContentPadding.set(padding); |
| mContentBounds.set(padding.left, padding.top, |
| getMeasuredWidth() - padding.right, |
| getMeasuredHeight() - padding.bottom); |
| mSearchBarBounds.set(searchBarBounds); |
| onUpdateBackgroundAndPaddings(mSearchBarBounds, padding); |
| } |
| } |
| |
| /** |
| * To be implemented by container views to update themselves when the bounds changes. |
| */ |
| protected abstract void onUpdateBackgroundAndPaddings(Rect searchBarBounds, Rect padding); |
| |
| /** |
| * Returns whether the search bar bounds we got are considered valid. |
| */ |
| private boolean isValidSearchBarBounds(Rect searchBarBounds) { |
| return !searchBarBounds.isEmpty() && |
| searchBarBounds.right <= getMeasuredWidth() && |
| searchBarBounds.bottom <= getMeasuredHeight(); |
| } |
| } |