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Merge "Expose locations from NotifStackScrollLayout"

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This commit is contained in:
Christoph Studer
2014-04-02 13:14:03 +00:00
committed by Android (Google) Code Review
parent 1ccace916c 6e3ecebcec
commit 892c574ecc
3 changed files with 79 additions and 15 deletions
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38
packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
View File

@@ -22,6 +22,7 @@ import android.content.res.Configuration;
import android.graphics.Canvas;
import android.graphics.Outline;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
@@ -37,6 +38,7 @@ import com.android.systemui.ExpandHelper;
import com.android.systemui.R;
import com.android.systemui.SwipeHelper;
import com.android.systemui.statusbar.ExpandableNotificationRow;
import com.android.systemui.statusbar.stack.StackScrollState.ViewState;
/**
* A layout which handles a dynamic amount of notifications and presents them in a scrollable stack.
@@ -86,7 +88,9 @@ public class NotificationStackScrollLayout extends ViewGroup
/**
* The current State this Layout is in
*/
private StackScrollState mCurrentStackScrollState;
private final StackScrollState mCurrentStackScrollState = new StackScrollState(this);
private OnChildLocationsChangedListener mListener;
public NotificationStackScrollLayout(Context context) {
this(context, null);
@@ -153,7 +157,6 @@ public class NotificationStackScrollLayout extends ViewGroup
// currently the padding is in the elements themself
mPaddingBetweenElements = 0;
mStackScrollAlgorithm = new StackScrollAlgorithm(context);
mCurrentStackScrollState = null;
}
@Override
@@ -188,6 +191,24 @@ public class NotificationStackScrollLayout extends ViewGroup
updateContentHeight();
}
public void setChildLocationsChangedListener(OnChildLocationsChangedListener listener) {
mListener = listener;
}
/**
* Returns the location the given child is currently rendered at.
*
* @param child the child to get the location for
* @return one of {@link ViewState}'s <code>LOCATION_*</code> constants
*/
public int getChildLocation(View child) {
ViewState childViewState = mCurrentStackScrollState.getViewStateForView(child);
if (childViewState == null) {
return ViewState.LOCATION_UNKNOWN;
}
return childViewState.location;
}
private void setMaxLayoutHeight(int maxLayoutHeight) {
mMaxLayoutHeight = maxLayoutHeight;
updateAlgorithmHeight();
@@ -203,13 +224,13 @@ public class NotificationStackScrollLayout extends ViewGroup
*/
private void updateChildren() {
if (!isCurrentlyAnimating()) {
if (mCurrentStackScrollState == null) {
mCurrentStackScrollState = new StackScrollState(this);
}
mCurrentStackScrollState.setScrollY(mOwnScrollY);
mStackScrollAlgorithm.getStackScrollState(mCurrentStackScrollState);
mCurrentStackScrollState.apply();
mOwnScrollY = mCurrentStackScrollState.getScrollY();
if (mListener != null) {
mListener.onChildLocationsChanged(this);
}
} else {
// TODO: handle animation
}
@@ -823,4 +844,11 @@ public class NotificationStackScrollLayout extends ViewGroup
public View getHostView() {
return this;
}
/**
* A listener that is notified when some child locations might have changed.
*/
public interface OnChildLocationsChangedListener {
public void onChildLocationsChanged(NotificationStackScrollLayout stackScrollLayout);
}
}

34
packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
View File

@@ -17,6 +17,7 @@
package com.android.systemui.statusbar.stack;
import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import com.android.systemui.R;
@@ -28,6 +29,8 @@ import com.android.systemui.R;
*/
public class StackScrollAlgorithm {
private static final String LOG_TAG = "StackScrollAlgorithm";
private static final int MAX_ITEMS_IN_BOTTOM_STACK = 3;
private static final int MAX_ITEMS_IN_TOP_STACK = 3;
@@ -130,6 +133,7 @@ public class StackScrollAlgorithm {
View child = hostView.getChildAt(i);
StackScrollState.ViewState childViewState = resultState.getViewStateForView(child);
childViewState.yTranslation = currentYPosition;
childViewState.location = StackScrollState.ViewState.LOCATION_UNKNOWN;
int childHeight = child.getHeight();
// The y position after this element
float nextYPosition = currentYPosition + childHeight + mPaddingBetweenElements;
@@ -143,12 +147,12 @@ public class StackScrollAlgorithm {
nextYPosition = updateStateForTopStackChild(algorithmState,
numberOfElementsCompletelyIn,
i, childViewState);
} else if (i == algorithmState.lastTopStackIndex) {
// Case 2:
// First element of regular scrollview comes next, so the position is just the
// scrolling position
nextYPosition = scrollOffset;
childViewState.location = StackScrollState.ViewState.LOCATION_TOP_STACK_PEEKING;
} else if (nextYPosition >= transitioningPositionStart) {
if (currentYPosition >= transitioningPositionStart) {
// Case 3:
@@ -156,8 +160,6 @@ public class StackScrollAlgorithm {
// bottom of the screen so we are fully in the bottom stack
nextYPosition = updateStateForChildFullyInBottomStack(algorithmState,
transitioningPositionStart, childViewState, childHeight);
} else {
// Case 4:
// According to the regular scroll view we are currently translating out of /
@@ -167,6 +169,16 @@ public class StackScrollAlgorithm {
currentYPosition, childViewState,
childHeight, nextYPosition);
}
} else {
childViewState.location = StackScrollState.ViewState.LOCATION_MAIN_AREA;
}
// The first card is always rendered.
if (i == 0) {
childViewState.alpha = 1.0f;
childViewState.location = StackScrollState.ViewState.LOCATION_FIRST_CARD;
}
if (childViewState.location == StackScrollState.ViewState.LOCATION_UNKNOWN) {
Log.wtf(LOG_TAG, "Failed to assign location for child " + i);
}
currentYPosition = nextYPosition;
yPositionInScrollView = yPositionInScrollViewAfterElement;
@@ -192,6 +204,8 @@ public class StackScrollAlgorithm {
if (childHeight != (int) newSize) {
childViewState.height = (int) newSize;
}
childViewState.location = StackScrollState.ViewState.LOCATION_MAIN_AREA;
return nextYPosition;
}
@@ -206,6 +220,7 @@ public class StackScrollAlgorithm {
nextYPosition = transitioningPositionStart
+ mBottomStackIndentationFunctor.getValue(
algorithmState.itemsInBottomStack);
childViewState.location = StackScrollState.ViewState.LOCATION_BOTTOM_STACK_PEEKING;
} else {
// we are fully inside the stack
if (algorithmState.itemsInBottomStack > MAX_ITEMS_IN_BOTTOM_STACK + 2) {
@@ -214,6 +229,7 @@ public class StackScrollAlgorithm {
> MAX_ITEMS_IN_BOTTOM_STACK + 1) {
childViewState.alpha = 1.0f - algorithmState.partialInBottom;
}
childViewState.location = StackScrollState.ViewState.LOCATION_BOTTOM_STACK_HIDDEN;
nextYPosition = transitioningPositionStart + mBottomStackPeekSize;
}
// TODO: only temporarily collapse
@@ -237,14 +253,16 @@ public class StackScrollAlgorithm {
nextYPosition = mCollapsedSize + mPaddingBetweenElements -
mTopStackIndentationFunctor.getValue(
algorithmState.itemsInTopStack - i - 1);
if (paddedIndex == 0 && i != 0) {
if (paddedIndex == 0) {
childViewState.alpha = 1.0f - algorithmState.partialInTop;
childViewState.location = StackScrollState.ViewState.LOCATION_TOP_STACK_HIDDEN;
} else {
childViewState.location = StackScrollState.ViewState.LOCATION_TOP_STACK_PEEKING;
}
} else {
// We are hidden behind the top card and faded out, so we can hide ourselfs
if (i != 0) {
childViewState.alpha = 0.0f;
}
// We are hidden behind the top card and faded out, so we can hide ourselves.
childViewState.alpha = 0.0f;
childViewState.location = StackScrollState.ViewState.LOCATION_TOP_STACK_HIDDEN;
}
return nextYPosition;
}

22
packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollState.java
View File

@@ -45,7 +45,7 @@ public class StackScrollState {
public StackScrollState(ViewGroup hostView) {
mHostView = hostView;
mStateMap = new HashMap<View, ViewState>(mHostView.getChildCount());
mStateMap = new HashMap<View, ViewState>();
}
public ViewGroup getHostView() {
@@ -144,10 +144,28 @@ public class StackScrollState {
}
public class ViewState {
public static class ViewState {
// These are flags such that we can create masks for filtering.
public static final int LOCATION_UNKNOWN = 0x00;
public static final int LOCATION_FIRST_CARD = 0x01;
public static final int LOCATION_TOP_STACK_HIDDEN = 0x02;
public static final int LOCATION_TOP_STACK_PEEKING = 0x04;
public static final int LOCATION_MAIN_AREA = 0x08;
public static final int LOCATION_BOTTOM_STACK_PEEKING = 0x10;
public static final int LOCATION_BOTTOM_STACK_HIDDEN = 0x20;
float alpha;
float yTranslation;
float zTranslation;
int height;
/**
* The location this view is currently rendered at.
*
* <p>See <code>LOCATION_</code> flags.</p>
*/
int location;
}
}