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/*
* Copyright (C) 2011 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.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class HolographicLinearLayout extends LinearLayout {
private final HolographicViewHelper mHolographicHelper;
private ImageView mImageView;
private int mImageViewId;
private boolean mHotwordOn;
private boolean mIsPressed;
private boolean mIsFocused;
public HolographicLinearLayout(Context context) {
this(context, null);
}
public HolographicLinearLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public HolographicLinearLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.HolographicLinearLayout,
defStyle, 0);
mImageViewId = a.getResourceId(R.styleable.HolographicLinearLayout_sourceImageViewId, -1);
mHotwordOn = a.getBoolean(R.styleable.HolographicLinearLayout_stateHotwordOn, false);
a.recycle();
setWillNotDraw(false);
mHolographicHelper = new HolographicViewHelper(context);
setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (isPressed() != mIsPressed) {
mIsPressed = isPressed();
refreshDrawableState();
}
return false;
}
});
setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (isFocused() != mIsFocused) {
mIsFocused = isFocused();
refreshDrawableState();
}
}
});
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mImageView != null) {
mHolographicHelper.generatePressedFocusedStates(mImageView);
Drawable d = mImageView.getDrawable();
if (d instanceof StateListDrawable) {
StateListDrawable sld = (StateListDrawable) d;
sld.setState(getDrawableState());
sld.invalidateSelf();
}
}
}
void invalidatePressedFocusedStates() {
mHolographicHelper.invalidatePressedFocusedStates(mImageView);
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// One time call to generate the pressed/focused state -- must be called after
// measure/layout
if (mImageView == null) {
mImageView = (ImageView) findViewById(mImageViewId);
}
mHolographicHelper.generatePressedFocusedStates(mImageView);
}
private boolean isHotwordOn() {
return mHotwordOn;
}
public void setHotwordState(boolean on) {
if (on == mHotwordOn) {
return;
}
mHotwordOn = on;
refreshDrawableState();
}
@Override
public int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
if (isHotwordOn()) {
mergeDrawableStates(drawableState, new int[] {R.attr.stateHotwordOn});
}
return drawableState;
}
}
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