1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
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
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17package com.android.launcher3;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.graphics.Canvas;
22import android.graphics.drawable.Drawable;
23import android.graphics.drawable.StateListDrawable;
24import android.util.AttributeSet;
25import android.view.MotionEvent;
26import android.view.View;
27import android.widget.ImageView;
28
29public class HolographicImageView extends ImageView {
30
31    private final HolographicViewHelper mHolographicHelper;
32    private boolean mHotwordOn;
33    private boolean mIsPressed;
34    private boolean mIsFocused;
35
36    public HolographicImageView(Context context) {
37        this(context, null);
38    }
39
40    public HolographicImageView(Context context, AttributeSet attrs) {
41        this(context, attrs, 0);
42    }
43
44    public HolographicImageView(Context context, AttributeSet attrs, int defStyle) {
45        super(context, attrs, defStyle);
46
47        mHolographicHelper = new HolographicViewHelper(context);
48        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.HolographicLinearLayout,
49                defStyle, 0);
50        mHotwordOn = a.getBoolean(R.styleable.HolographicLinearLayout_stateHotwordOn, false);
51        a.recycle();
52
53        setOnTouchListener(new OnTouchListener() {
54            @Override
55            public boolean onTouch(View v, MotionEvent event) {
56                if (isPressed() != mIsPressed) {
57                    mIsPressed = isPressed();
58                    refreshDrawableState();
59                }
60                return false;
61            }
62        });
63
64        setOnFocusChangeListener(new OnFocusChangeListener() {
65            @Override
66            public void onFocusChange(View v, boolean hasFocus) {
67                if (isFocused() != mIsFocused) {
68                    mIsFocused = isFocused();
69                    refreshDrawableState();
70                }
71            }
72        });
73    }
74
75    void invalidatePressedFocusedStates() {
76        mHolographicHelper.invalidatePressedFocusedStates(this);
77    }
78
79    @Override
80    protected void drawableStateChanged() {
81        super.drawableStateChanged();
82
83        mHolographicHelper.generatePressedFocusedStates(this);
84        Drawable d = getDrawable();
85        if (d instanceof StateListDrawable) {
86            StateListDrawable sld = (StateListDrawable) d;
87            sld.setState(getDrawableState());
88            sld.invalidateSelf();
89        }
90    }
91
92    @Override
93    protected void onDraw(Canvas canvas) {
94        super.onDraw(canvas);
95
96        // One time call to generate the pressed/focused state -- must be called after
97        // measure/layout
98        mHolographicHelper.generatePressedFocusedStates(this);
99    }
100
101    private boolean isHotwordOn() {
102        return mHotwordOn;
103    }
104
105    public void setHotwordState(boolean on) {
106        if (on == mHotwordOn) {
107            return;
108        }
109        mHotwordOn = on;
110        refreshDrawableState();
111    }
112
113    @Override
114    public int[] onCreateDrawableState(int extraSpace) {
115        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
116        if (isHotwordOn()) {
117            mergeDrawableStates(drawableState, new int[] {R.attr.stateHotwordOn});
118        }
119        return drawableState;
120    }
121}
122