2 * Copyright (C) 2015 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.android.launcher3;
19 import android.content.Context;
20 import android.graphics.Rect;
21 import android.util.AttributeSet;
22 import android.util.Log;
23 import android.widget.LinearLayout;
26 * A base container view, which supports resizing.
28 public abstract class BaseContainerView extends LinearLayout implements Insettable {
30 private final static String TAG = "BaseContainerView";
33 private Rect mInsets = new Rect();
34 // The bounds of the search bar. Only the left, top, right are used to inset the
35 // search bar and the height is determined by the measurement of the layout
36 private Rect mFixedSearchBarBounds = new Rect();
37 // The bounds of the container
38 protected Rect mContentBounds = new Rect();
39 // The padding to apply to the container to achieve the bounds
40 protected Rect mContentPadding = new Rect();
41 // The inset to apply to the edges and between the search bar and the container
42 private int mContainerBoundsInset;
43 private boolean mHasSearchBar;
45 public BaseContainerView(Context context) {
49 public BaseContainerView(Context context, AttributeSet attrs) {
50 this(context, attrs, 0);
53 public BaseContainerView(Context context, AttributeSet attrs, int defStyleAttr) {
54 super(context, attrs, defStyleAttr);
55 mContainerBoundsInset = getResources().getDimensionPixelSize(R.dimen.container_bounds_inset);
59 final public void setInsets(Rect insets) {
61 updateBackgroundAndPaddings();
64 protected void setHasSearchBar() {
69 * Sets the search bar bounds for this container view to match.
71 final public void setSearchBarBounds(Rect bounds) {
72 if (LauncherAppState.isDogfoodBuild() && !isValidSearchBarBounds(bounds)) {
73 Log.e(TAG, "Invalid search bar bounds: " + bounds);
76 mFixedSearchBarBounds.set(bounds);
78 // Post the updates since they can trigger a relayout, and this call can be triggered from
79 // a layout pass itself.
83 updateBackgroundAndPaddings();
89 * Update the backgrounds and padding in response to a change in the bounds or insets.
91 protected void updateBackgroundAndPaddings() {
93 Rect searchBarBounds = new Rect(mFixedSearchBarBounds);
94 if (!isValidSearchBarBounds(mFixedSearchBarBounds)) {
95 // Use the default bounds
96 padding = new Rect(mInsets.left + mContainerBoundsInset,
97 (mHasSearchBar ? 0 : (mInsets.top + mContainerBoundsInset)),
98 mInsets.right + mContainerBoundsInset,
99 mInsets.bottom + mContainerBoundsInset);
101 // Special case -- we have the search bar, but no specific bounds, so just give it
102 // the inset bounds without a height.
103 searchBarBounds.set(mInsets.left + mContainerBoundsInset,
104 mInsets.top + mContainerBoundsInset,
105 getMeasuredWidth() - (mInsets.right + mContainerBoundsInset), 0);
107 // Use the search bounds, if there is a search bar, the bounds will contain
108 // the offsets for the insets so we can ignore that
109 padding = new Rect(mFixedSearchBarBounds.left,
110 (mHasSearchBar ? 0 : (mInsets.top + mContainerBoundsInset)),
111 getMeasuredWidth() - mFixedSearchBarBounds.right,
112 mInsets.bottom + mContainerBoundsInset);
114 if (!padding.equals(mContentPadding) || !searchBarBounds.equals(mFixedSearchBarBounds)) {
115 mContentPadding.set(padding);
116 mContentBounds.set(padding.left, padding.top,
117 getMeasuredWidth() - padding.right,
118 getMeasuredHeight() - padding.bottom);
119 mFixedSearchBarBounds.set(searchBarBounds);
120 onUpdateBackgroundAndPaddings(mFixedSearchBarBounds, padding);
125 * To be implemented by container views to update themselves when the bounds changes.
127 protected abstract void onUpdateBackgroundAndPaddings(Rect searchBarBounds, Rect padding);
130 * Returns whether the search bar bounds we got are considered valid.
132 private boolean isValidSearchBarBounds(Rect searchBarBounds) {
133 return !searchBarBounds.isEmpty() &&
134 searchBarBounds.right <= getMeasuredWidth() &&
135 searchBarBounds.bottom <= getMeasuredHeight();