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/*
* Copyright (C) 2010 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.app.StatusBarManager;
import android.content.res.Resources;
import android.graphics.RectF;
import android.view.MotionEvent;
import android.view.View;
import com.android.systemui.R;
import com.android.systemui.statusbar.phone.PhoneStatusBar;
public class DelegateViewHelper {
private View mDelegateView;
private View mSourceView;
private PhoneStatusBar mBar;
private int[] mTempPoint = new int[2];
private float[] mDownPoint = new float[2];
private float mTriggerThreshhold;
private boolean mPanelShowing;
RectF mInitialTouch = new RectF();
private boolean mStarted;
private boolean mSwapXY = false;
private boolean mDisabled;
public DelegateViewHelper(View sourceView) {
setSourceView(sourceView);
}
public void setDelegateView(View view) {
mDelegateView = view;
}
public void setBar(PhoneStatusBar phoneStatusBar) {
mBar = phoneStatusBar;
}
public boolean onInterceptTouchEvent(MotionEvent event) {
if (mSourceView == null || mDelegateView == null || mBar.shouldDisableNavbarGestures()) {
return false;
}
mSourceView.getLocationOnScreen(mTempPoint);
final float sourceX = mTempPoint[0];
final float sourceY = mTempPoint[1];
final int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
mPanelShowing = mDelegateView.getVisibility() == View.VISIBLE;
mDownPoint[0] = event.getX();
mDownPoint[1] = event.getY();
mStarted = mInitialTouch.contains(mDownPoint[0] + sourceX, mDownPoint[1] + sourceY);
break;
}
if (!mStarted) {
return false;
}
if (!mDisabled && !mPanelShowing && action == MotionEvent.ACTION_MOVE) {
final int historySize = event.getHistorySize();
for (int k = 0; k < historySize + 1; k++) {
float x = k < historySize ? event.getHistoricalX(k) : event.getX();
float y = k < historySize ? event.getHistoricalY(k) : event.getY();
final float distance = mSwapXY ? (mDownPoint[0] - x) : (mDownPoint[1] - y);
if (distance > mTriggerThreshhold) {
mBar.invokeAssistGesture(false /* vibrate */);
mPanelShowing = true;
break;
}
}
}
if (action == MotionEvent.ACTION_DOWN) {
mBar.setInteracting(StatusBarManager.WINDOW_NAVIGATION_BAR, true);
} else if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) {
mBar.setInteracting(StatusBarManager.WINDOW_NAVIGATION_BAR, false);
}
mDelegateView.getLocationOnScreen(mTempPoint);
final float delegateX = mTempPoint[0];
final float delegateY = mTempPoint[1];
float deltaX = sourceX - delegateX;
float deltaY = sourceY - delegateY;
event.offsetLocation(deltaX, deltaY);
mDelegateView.dispatchTouchEvent(event);
event.offsetLocation(-deltaX, -deltaY);
return mPanelShowing;
}
public void abortCurrentGesture() {
if (mStarted) {
mStarted = false;
mBar.setInteracting(StatusBarManager.WINDOW_NAVIGATION_BAR, false);
}
}
public void setSourceView(View view) {
mSourceView = view;
if (mSourceView != null) {
Resources r = mSourceView.getContext().getResources();
mTriggerThreshhold = r.getDimensionPixelSize(R.dimen.navigation_bar_min_swipe_distance);
}
}
/**
* Selects the initial touch region based on a list of views. This is meant to be called by
* a container widget on children over which the initial touch should be detected. Note this
* will compute a minimum bound that contains all specified views.
*
* @param views
*/
public void setInitialTouchRegion(View ... views) {
RectF bounds = new RectF();
int p[] = new int[2];
for (int i = 0; i < views.length; i++) {
View view = views[i];
if (view == null) continue;
view.getLocationOnScreen(p);
if (i == 0) {
bounds.set(p[0], p[1], p[0] + view.getWidth(), p[1] + view.getHeight());
} else {
bounds.union(p[0], p[1], p[0] + view.getWidth(), p[1] + view.getHeight());
}
}
mInitialTouch.set(bounds);
}
/**
* When rotation is set to NO_SENSOR, then this allows swapping x/y for gesture detection
* @param swap
*/
public void setSwapXY(boolean swap) {
mSwapXY = swap;
}
public void setDisabled(boolean disabled) {
mDisabled = disabled;
}
}
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