org.chromium.chrome.browser.compositor.layouts.eventfilter.EventFilter Java Examples

/**
 * @param e                 The {@link MotionEvent} to consider.
 * @param offsets           The current touch offsets that should be applied to the
 *                          {@link EventFilter}s.
 * @param isKeyboardShowing Whether or not the keyboard is showing.
 * @return The {@link EventFilter} the {@link Layout} is listening to.
 */
public EventFilter findInterceptingEventFilter(
        MotionEvent e, PointF offsets, boolean isKeyboardShowing) {
    // The last added overlay will be drawn on top of everything else, therefore the last
    // filter added should have the first chance to intercept any touch events.
    for (int i = mSceneOverlays.size() - 1; i >= 0; i--) {
        EventFilter eventFilter = mSceneOverlays.get(i).getEventFilter();
        if (eventFilter == null) continue;
        if (offsets != null) eventFilter.setCurrentMotionEventOffsets(offsets.x, offsets.y);
        if (eventFilter.onInterceptTouchEvent(e, isKeyboardShowing)) return eventFilter;
    }

    EventFilter layoutEventFilter = getEventFilter();
    if (layoutEventFilter != null) {
        if (offsets != null) {
            layoutEventFilter.setCurrentMotionEventOffsets(offsets.x, offsets.y);
        }
        if (layoutEventFilter.onInterceptTouchEvent(e, isKeyboardShowing)) {
            return layoutEventFilter;
        }
    }
    return null;
}
 

/**
 * Gives the {@link LayoutManager} a chance to intercept and process touch events from the
 * Android {@link View} system.
 * @param e                 The {@link MotionEvent} that might be intercepted.
 * @param isKeyboardShowing Whether or not the keyboard is showing.
 * @return                  Whether or not this current touch gesture should be intercepted and
 *                          continually forwarded to this class.
 */
public boolean onInterceptTouchEvent(MotionEvent e, boolean isKeyboardShowing) {
    if (mActiveLayout == null) return false;

    if (e.getAction() == MotionEvent.ACTION_DOWN) {
        mLastTapX = (int) e.getX();
        mLastTapY = (int) e.getY();
    }

    PointF offsets = getMotionOffsets(e);

    EventFilter layoutFilter =
            mActiveLayout.findInterceptingEventFilter(e, offsets, isKeyboardShowing);
    mIsNewEventFilter = layoutFilter != mActiveEventFilter;
    mActiveEventFilter = layoutFilter;

    if (mActiveEventFilter != null) mActiveLayout.unstallImmediately();
    return mActiveEventFilter != null;
}
 

/**
 * @param e                 The {@link MotionEvent} to consider.
 * @param offsets           The current touch offsets that should be applied to the
 *                          {@link EventFilter}s.
 * @param isKeyboardShowing Whether or not the keyboard is showing.
 * @return The {@link EventFilter} the {@link Layout} is listening to.
 */
public EventFilter findInterceptingEventFilter(
        MotionEvent e, Point offsets, boolean isKeyboardShowing) {
    // The last added overlay will be drawn on top of everything else, therefore the last
    // filter added should have the first chance to intercept any touch events.
    for (int i = mSceneOverlays.size() - 1; i >= 0; i--) {
        EventFilter eventFilter = mSceneOverlays.get(i).getEventFilter();
        if (eventFilter == null) continue;
        if (offsets != null) eventFilter.setCurrentMotionEventOffsets(offsets.x, offsets.y);
        if (eventFilter.onInterceptTouchEvent(e, isKeyboardShowing)) return eventFilter;
    }

    if (mEventFilter != null) {
        if (offsets != null) mEventFilter.setCurrentMotionEventOffsets(offsets.x, offsets.y);
        if (mEventFilter.onInterceptTouchEvent(e, isKeyboardShowing)) return mEventFilter;
    }
    return null;
}
 

/**
 * @param context     The current Android's context.
 * @param updateHost  The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost  The {@link LayoutRenderHost} view for this layout.
 * @param eventFilter The {@link EventFilter} that is needed for this view.
 */
public StackLayout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter) {
    super(context, updateHost, renderHost, eventFilter);

    final ViewConfiguration configuration = ViewConfiguration.get(context);
    mMinDirectionThreshold = configuration.getScaledTouchSlop();
    mMinShortPressThresholdSqr =
            configuration.getScaledPagingTouchSlop() * configuration.getScaledPagingTouchSlop();

    mMinMaxInnerMargin = (int) (MIN_INNER_MARGIN_PERCENT_DP + 0.5);
    mFlingSpeed = FLING_SPEED_DP;
    mStacks = new Stack[2];
    mStacks[0] = new Stack(context, this);
    mStacks[1] = new Stack(context, this);
    mStackRects = new RectF[2];
    mStackRects[0] = new RectF();
    mStackRects[1] = new RectF();

    mViewContainer = new FrameLayout(getContext());
    mSceneLayer = new TabListSceneLayer();
}
 

/**
 * @param context     The current Android's context.
 * @param updateHost  The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost  The {@link LayoutRenderHost} view for this layout.
 * @param eventFilter The {@link EventFilter} that is needed for this view.
 */
public StackLayout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter) {
    super(context, updateHost, renderHost, eventFilter);

    final ViewConfiguration configuration = ViewConfiguration.get(context);
    mMinDirectionThreshold = configuration.getScaledTouchSlop();
    mMinShortPressThresholdSqr =
            configuration.getScaledPagingTouchSlop() * configuration.getScaledPagingTouchSlop();

    mMinMaxInnerMargin = (int) (MIN_INNER_MARGIN_PERCENT_DP + 0.5);
    mFlingSpeed = FLING_SPEED_DP;
    mStacks = new Stack[2];
    mStacks[0] = new Stack(context, this);
    mStacks[1] = new Stack(context, this);
    mStackRects = new RectF[2];
    mStackRects[0] = new RectF();
    mStackRects[1] = new RectF();

    mViewContainer = new FrameLayout(getContext());
    mSceneLayer = new TabListSceneLayer();
}
 

/**
 * @param e                 The {@link MotionEvent} to consider.
 * @param offsets           The current touch offsets that should be applied to the
 *                          {@link EventFilter}s.
 * @param isKeyboardShowing Whether or not the keyboard is showing.
 * @return The {@link EventFilter} the {@link Layout} is listening to.
 */
public EventFilter findInterceptingEventFilter(
        MotionEvent e, Point offsets, boolean isKeyboardShowing) {
    // The last added overlay will be drawn on top of everything else, therefore the last
    // filter added should have the first chance to intercept any touch events.
    for (int i = mSceneOverlays.size() - 1; i >= 0; i--) {
        EventFilter eventFilter = mSceneOverlays.get(i).getEventFilter();
        if (eventFilter == null) continue;
        if (offsets != null) eventFilter.setCurrentMotionEventOffsets(offsets.x, offsets.y);
        if (eventFilter.onInterceptTouchEvent(e, isKeyboardShowing)) return eventFilter;
    }

    if (mEventFilter != null) {
        if (offsets != null) mEventFilter.setCurrentMotionEventOffsets(offsets.x, offsets.y);
        if (mEventFilter.onInterceptTouchEvent(e, isKeyboardShowing)) return mEventFilter;
    }
    return null;
}
 

/**
 * The {@link Layout} is not usable until sizeChanged is called.
 * This is convenient this way so we can pre-create the layout before the host is fully defined.
 * @param context      The current Android's context.
 * @param updateHost   The parent {@link LayoutUpdateHost}.
 * @param renderHost   The parent {@link LayoutRenderHost}.
 * @param eventFilter  The {@link EventFilter} this {@link Layout} is listening to.
 */
public Layout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter) {
    mContext = context;
    mUpdateHost = updateHost;
    mRenderHost = renderHost;
    mEventFilter = eventFilter;

    // Invalid sizes
    mWidth = -1;
    mHeight = -1;
    mHeightMinusTopControls = -1;

    mCurrentOrientation = Orientation.UNSET;
}
 

/**
 * @param context             The current Android's context.
 * @param updateHost          The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost          The {@link LayoutRenderHost} view for this layout.
 * @param eventFilter         The {@link EventFilter} that is needed for this view.
 */
public ToolbarSwipeLayout(Context context, LayoutUpdateHost updateHost,
        LayoutRenderHost renderHost, EventFilter eventFilter) {
    super(context, updateHost, renderHost, eventFilter);
    Resources res = context.getResources();
    final float pxToDp = 1.0f / res.getDisplayMetrics().density;
    mCommitDistanceFromEdge = res.getDimension(R.dimen.toolbar_swipe_commit_distance) * pxToDp;
    mSpaceBetweenTabs = res.getDimension(R.dimen.toolbar_swipe_space_between_tabs) * pxToDp;
    mSceneLayer = new TabListSceneLayer();
}
 

/**
 * Creates an instance of the {@link StaticLayout}.
 * @param context             The current Android's context.
 * @param updateHost          The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost          The {@link LayoutRenderHost} view for this layout.
 * @param eventFilter         The {@link EventFilter} that is needed for this view.
 * @param panelManager        The {@link OverlayPanelManager} responsible for showing panels.
 */
public StaticLayout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter, OverlayPanelManager panelManager) {
    super(context, updateHost, renderHost, eventFilter);

    mHandler = new Handler();
    mUnstallRunnable = new UnstallRunnable();
    mUnstalling = false;
    mSceneLayer = new StaticTabSceneLayer(R.id.control_container);
}
 

/**
 * Creates an instance of the {@link StaticLayout}.
 * @param context             The current Android's context.
 * @param updateHost          The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost          The {@link LayoutRenderHost} view for this layout.
 * @param panelManager        The {@link OverlayPanelManager} responsible for showing panels.
 */
public StaticLayout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter, OverlayPanelManager panelManager) {
    super(context, updateHost, renderHost);

    mHandler = new Handler();
    mUnstallRunnable = new UnstallRunnable();
    mUnstalling = false;
    mSceneLayer = new StaticTabSceneLayer(R.id.control_container);
}
 

/**
 * @param context             The current Android's context.
 * @param updateHost          The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost          The {@link LayoutRenderHost} view for this layout.
 * @param eventFilter         The {@link EventFilter} that is needed for this view.
 */
public ToolbarSwipeLayout(Context context, LayoutUpdateHost updateHost,
        LayoutRenderHost renderHost, EventFilter eventFilter) {
    super(context, updateHost, renderHost, eventFilter);
    Resources res = context.getResources();
    final float pxToDp = 1.0f / res.getDisplayMetrics().density;
    mCommitDistanceFromEdge = res.getDimension(R.dimen.toolbar_swipe_commit_distance) * pxToDp;
    mSpaceBetweenTabs = res.getDimension(R.dimen.toolbar_swipe_space_between_tabs) * pxToDp;
    mSceneLayer = new TabListSceneLayer();
}
 

/**
 * Creates an instance of the {@link StaticLayout}.
 * @param context             The current Android's context.
 * @param updateHost          The {@link LayoutUpdateHost} view for this layout.
 * @param renderHost          The {@link LayoutRenderHost} view for this layout.
 * @param eventFilter         The {@link EventFilter} that is needed for this view.
 * @param panelManager        The {@link OverlayPanelManager} responsible for showing panels.
 */
public StaticLayout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter, OverlayPanelManager panelManager) {
    super(context, updateHost, renderHost, eventFilter);

    mHandler = new Handler();
    mUnstallRunnable = new UnstallRunnable();
    mUnstalling = false;
    mSceneLayer = new StaticTabSceneLayer(R.id.control_container);
}
 

/**
 * The {@link Layout} is not usable until sizeChanged is called.
 * This is convenient this way so we can pre-create the layout before the host is fully defined.
 * @param context      The current Android's context.
 * @param updateHost   The parent {@link LayoutUpdateHost}.
 * @param renderHost   The parent {@link LayoutRenderHost}.
 * @param eventFilter  The {@link EventFilter} this {@link Layout} is listening to.
 */
public Layout(Context context, LayoutUpdateHost updateHost, LayoutRenderHost renderHost,
        EventFilter eventFilter) {
    mContext = context;
    mUpdateHost = updateHost;
    mRenderHost = renderHost;
    mEventFilter = eventFilter;

    // Invalid sizes
    mWidth = -1;
    mHeight = -1;
    mHeightMinusBrowserControls = -1;

    mCurrentOrientation = Orientation.UNSET;
}
 

@Override
public EventFilter getEventFilter() {
    return mEventFilter;
}
 

public OverviewListLayout(Context context, LayoutUpdateHost updateHost,
        LayoutRenderHost renderHost, EventFilter eventFilter) {
    super(context, updateHost, renderHost, eventFilter);
    mDpToPx = context.getResources().getDisplayMetrics().density;
    mSceneLayer = new SceneLayer();
}
 

@Override
public EventFilter getEventFilter() {
    return null;
}
 

@Override
public EventFilter getEventFilter() {
    return mEventFilter;
}
 

@Override
protected EventFilter getEventFilter() {
    return mBlackHoleEventFilter;
}
 

@Override
protected EventFilter getEventFilter() {
    return null;
}
 

@Override
public EventFilter getEventFilter() {
    return mEventFilter;
}
 

@Override
public Layout createOverviewLayout(Context context, LayoutUpdateHost updateHost,
        LayoutRenderHost renderHost, EventFilter eventFilter) {
    return new StackLayout(context, updateHost, renderHost, eventFilter);
}
 

@Override
protected EventFilter getEventFilter() {
    return mBlackHoleEventFilter;
}
 

@Override
public Layout createOverviewLayout(Context context, LayoutUpdateHost updateHost,
        LayoutRenderHost renderHost, EventFilter eventFilter) {
    return new StackLayout(context, updateHost, renderHost, eventFilter);
}
 

public OverviewListLayout(Context context, LayoutUpdateHost updateHost,
        LayoutRenderHost renderHost, EventFilter eventFilter) {
    super(context, updateHost, renderHost, eventFilter);
    mDpToPx = context.getResources().getDisplayMetrics().density;
    mSceneLayer = new SceneLayer();
}
 

@Override
public EventFilter getEventFilter() {
    return null;
}
 

@Override
public EventFilter getEventFilter() {
    return mEventFilter;
}
 

@Override
protected EventFilter getEventFilter() {
    return mGestureEventFilter;
}
 

@Override
public EventFilter getEventFilter() {
    return mEventFilter;
}
 

@Override
public EventFilter getEventFilter() {
    return null;
}
 

@Override
public EventFilter getEventFilter() {
    return mEventFilter;
}