/*
* Copyright (C) 2014 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.systemui.statusbar;
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import com.android.systemui.R;
import com.android.systemui.statusbar.stack.NotificationStackScrollLayout;
import java.util.ArrayList;
/**
* An abstract view for expandable views.
*/
public abstract class ExpandableView extends FrameLayout {
private final int mMaxNotificationHeight;
private OnHeightChangedListener mOnHeightChangedListener;
private int mActualHeight;
protected int mClipTopAmount;
private boolean mActualHeightInitialized;
private boolean mDark;
private ArrayList<View> mMatchParentViews = new ArrayList<View>();
public ExpandableView(Context context, AttributeSet attrs) {
super(context, attrs);
mMaxNotificationHeight = getResources().getDimensionPixelSize(
R.dimen.notification_max_height);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int ownMaxHeight = mMaxNotificationHeight;
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
boolean hasFixedHeight = heightMode == MeasureSpec.EXACTLY;
boolean isHeightLimited = heightMode == MeasureSpec.AT_MOST;
if (hasFixedHeight || isHeightLimited) {
int size = MeasureSpec.getSize(heightMeasureSpec);
ownMaxHeight = Math.min(ownMaxHeight, size);
}
int newHeightSpec = MeasureSpec.makeMeasureSpec(ownMaxHeight, MeasureSpec.AT_MOST);
int maxChildHeight = 0;
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
int childHeightSpec = newHeightSpec;
ViewGroup.LayoutParams layoutParams = child.getLayoutParams();
if (layoutParams.height != ViewGroup.LayoutParams.MATCH_PARENT) {
if (layoutParams.height >= 0) {
// An actual height is set
childHeightSpec = layoutParams.height > ownMaxHeight
? MeasureSpec.makeMeasureSpec(ownMaxHeight, MeasureSpec.EXACTLY)
: MeasureSpec.makeMeasureSpec(layoutParams.height, MeasureSpec.EXACTLY);
}
child.measure(
getChildMeasureSpec(widthMeasureSpec, 0 /* padding */, layoutParams.width),
childHeightSpec);
int childHeight = child.getMeasuredHeight();
maxChildHeight = Math.max(maxChildHeight, childHeight);
} else {
mMatchParentViews.add(child);
}
}
int ownHeight = hasFixedHeight ? ownMaxHeight : maxChildHeight;
newHeightSpec = MeasureSpec.makeMeasureSpec(ownHeight, MeasureSpec.EXACTLY);
for (View child : mMatchParentViews) {
child.measure(getChildMeasureSpec(
widthMeasureSpec, 0 /* padding */, child.getLayoutParams().width),
newHeightSpec);
}
mMatchParentViews.clear();
int width = MeasureSpec.getSize(widthMeasureSpec);
setMeasuredDimension(width, ownHeight);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (!mActualHeightInitialized && mActualHeight == 0) {
int initialHeight = getInitialHeight();
if (initialHeight != 0) {
setActualHeight(initialHeight);
}
}
}
/**
* Resets the height of the view on the next layout pass
*/
protected void resetActualHeight() {
mActualHeight = 0;
mActualHeightInitialized = false;
requestLayout();
}
protected int getInitialHeight() {
return getHeight();
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (filterMotionEvent(ev)) {
return super.dispatchTouchEvent(ev);
}
return false;
}
protected boolean filterMotionEvent(MotionEvent event) {
return event.getActionMasked() != MotionEvent.ACTION_DOWN
|| event.getY() > mClipTopAmount && event.getY() < mActualHeight;
}
/**
* Sets the actual height of this notification. This is different than the laid out
* {@link View#getHeight()}, as we want to avoid layouting during scrolling and expanding.
*
* @param actualHeight The height of this notification.
* @param notifyListeners Whether the listener should be informed about the change.
*/
public void setActualHeight(int actualHeight, boolean notifyListeners) {
mActualHeightInitialized = true;
mActualHeight = actualHeight;
if (notifyListeners) {
notifyHeightChanged();
}
}
public void setActualHeight(int actualHeight) {
setActualHeight(actualHeight, true);
}
/**
* See {@link #setActualHeight}.
*
* @return The current actual height of this notification.
*/
public int getActualHeight() {
return mActualHeight;
}
/**
* @return The maximum height of this notification.
*/
public int getMaxHeight() {
return getHeight();
}
/**
* @return The minimum height of this notification.
*/
public int getMinHeight() {
return getHeight();
}
/**
* Sets the notification as dimmed. The default implementation does nothing.
*
* @param dimmed Whether the notification should be dimmed.
* @param fade Whether an animation should be played to change the state.
*/
public void setDimmed(boolean dimmed, boolean fade) {
}
/**
* Sets the notification as dark. The default implementation does nothing.
*
* @param dark Whether the notification should be dark.
* @param fade Whether an animation should be played to change the state.
* @param delay If fading, the delay of the animation.
*/
public void setDark(boolean dark, boolean fade, long delay) {
mDark = dark;
}
public boolean isDark() {
return mDark;
}
/**
* See {@link #setHideSensitive}. This is a variant which notifies this view in advance about
* the upcoming state of hiding sensitive notifications. It gets called at the very beginning
* of a stack scroller update such that the updated intrinsic height (which is dependent on
* whether private or public layout is showing) gets taken into account into all layout
* calculations.
*/
public void setHideSensitiveForIntrinsicHeight(boolean hideSensitive) {
}
/**
* Sets whether the notification should hide its private contents if it is sensitive.
*/
public void setHideSensitive(boolean hideSensitive, boolean animated, long delay,
long duration) {
}
/**
* @return The desired notification height.
*/
public int getIntrinsicHeight() {
return getHeight();
}
/**
* Sets the amount this view should be clipped from the top. This is used when an expanded
* notification is scrolling in the top or bottom stack.
*
* @param clipTopAmount The amount of pixels this view should be clipped from top.
*/
public void setClipTopAmount(int clipTopAmount) {
mClipTopAmount = clipTopAmount;
}
public int getClipTopAmount() {
return mClipTopAmount;
}
public void setOnHeightChangedListener(OnHeightChangedListener listener) {
mOnHeightChangedListener = listener;
}
/**
* @return Whether we can expand this views content.
*/
public boolean isContentExpandable() {
return false;
}
public void notifyHeightChanged() {
if (mOnHeightChangedListener != null) {
mOnHeightChangedListener.onHeightChanged(this);
}
}
public boolean isTransparent() {
return false;
}
/**
* Perform a remove animation on this view.
*
* @param duration The duration of the remove animation.
* @param translationDirection The direction value from [-1 ... 1] indicating in which the
* animation should be performed. A value of -1 means that The
* remove animation should be performed upwards,
* such that the child appears to be going away to the top. 1
* Should mean the opposite.
* @param onFinishedRunnable A runnable which should be run when the animation is finished.
*/
public abstract void performRemoveAnimation(long duration, float translationDirection,
Runnable onFinishedRunnable);
public abstract void performAddAnimation(long delay, long duration);
public void setBelowSpeedBump(boolean below) {
}
public void onHeightReset() {
if (mOnHeightChangedListener != null) {
mOnHeightChangedListener.onReset(this);
}
}
/**
* This method returns the drawing rect for the view which is different from the regular
* drawing rect, since we layout all children in the {@link NotificationStackScrollLayout} at
* position 0 and usually the translation is neglected. Since we are manually clipping this
* view,we also need to subtract the clipTopAmount from the top. This is needed in order to
* ensure that accessibility and focusing work correctly.
*
* @param outRect The (scrolled) drawing bounds of the view.
*/
@Override
public void getDrawingRect(Rect outRect) {
super.getDrawingRect(outRect);
outRect.left += getTranslationX();
outRect.right += getTranslationX();
outRect.bottom = (int) (outRect.top + getTranslationY() + getActualHeight());
outRect.top += getTranslationY() + getClipTopAmount();
}
/**
* A listener notifying when {@link #getActualHeight} changes.
*/
public interface OnHeightChangedListener {
/**
* @param view the view for which the height changed, or {@code null} if just the top
* padding or the padding between the elements changed
*/
void onHeightChanged(ExpandableView view);
/**
* Called when the view is reset and therefore the height will change abruptly
*
* @param view The view which was reset.
*/
void onReset(ExpandableView view);
}
}
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