/*
* Copyright (C) 2012 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.phone;
import java.util.ArrayList;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Slog;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
public class PanelBar extends FrameLayout {
public static final boolean DEBUG = false;
public static final String TAG = PanelBar.class.getSimpleName();
public static final void LOG(String fmt, Object... args) {
if (!DEBUG) return;
Slog.v(TAG, String.format(fmt, args));
}
public static final int STATE_CLOSED = 0;
public static final int STATE_OPENING = 1;
public static final int STATE_OPEN = 2;
PanelHolder mPanelHolder;
ArrayList<PanelView> mPanels = new ArrayList<PanelView>();
PanelView mTouchingPanel;
private int mState = STATE_CLOSED;
private boolean mTracking;
float mPanelExpandedFractionSum;
public void go(int state) {
if (DEBUG) LOG("go state: %d -> %d", mState, state);
mState = state;
}
public PanelBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
}
public void addPanel(PanelView pv) {
mPanels.add(pv);
pv.setBar(this);
}
public void setPanelHolder(PanelHolder ph) {
if (ph == null) {
Slog.e(TAG, "setPanelHolder: null PanelHolder", new Throwable());
return;
}
ph.setBar(this);
mPanelHolder = ph;
final int N = ph.getChildCount();
for (int i=0; i<N; i++) {
final View v = ph.getChildAt(i);
if (v != null && v instanceof PanelView) {
addPanel((PanelView) v);
}
}
}
public float getBarHeight() {
return getMeasuredHeight();
}
public PanelView selectPanelForTouch(MotionEvent touch) {
final int N = mPanels.size();
return mPanels.get((int)(N * touch.getX() / getMeasuredWidth()));
}
public boolean panelsEnabled() {
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// Allow subclasses to implement enable/disable semantics
if (!panelsEnabled()) return false;
// figure out which panel needs to be talked to here
if (event.getAction() == MotionEvent.ACTION_DOWN) {
final PanelView panel = selectPanelForTouch(event);
if (panel == null) {
// panel is not there, so we'll eat the gesture
if (DEBUG) LOG("PanelBar.onTouch: no panel for x=%d, bailing", event.getX());
mTouchingPanel = null;
return true;
}
boolean enabled = panel.isEnabled();
if (DEBUG) LOG("PanelBar.onTouch: state=%d ACTION_DOWN: panel %s %s", mState, panel,
(enabled ? "" : " (disabled)"));
if (!enabled) {
// panel is disabled, so we'll eat the gesture
mTouchingPanel = null;
return true;
}
startOpeningPanel(panel);
}
final boolean result = mTouchingPanel != null
? mTouchingPanel.onTouchEvent(event)
: true;
return result;
}
// called from PanelView when self-expanding, too
public void startOpeningPanel(PanelView panel) {
if (DEBUG) LOG("startOpeningPanel: " + panel);
mTouchingPanel = panel;
mPanelHolder.setSelectedPanel(mTouchingPanel);
for (PanelView pv : mPanels) {
if (pv != panel) {
pv.collapse();
}
}
}
public void panelExpansionChanged(PanelView panel, float frac) {
boolean fullyClosed = true;
PanelView fullyOpenedPanel = null;
if (DEBUG) LOG("panelExpansionChanged: start state=%d panel=%s", mState, panel.getName());
mPanelExpandedFractionSum = 0f;
for (PanelView pv : mPanels) {
final boolean visible = pv.getVisibility() == View.VISIBLE;
// adjust any other panels that may be partially visible
if (pv.getExpandedHeight() > 0f) {
if (mState == STATE_CLOSED) {
go(STATE_OPENING);
onPanelPeeked();
}
fullyClosed = false;
final float thisFrac = pv.getExpandedFraction();
mPanelExpandedFractionSum += (visible ? thisFrac : 0);
if (DEBUG) LOG("panelExpansionChanged: -> %s: f=%.1f", pv.getName(), thisFrac);
if (panel == pv) {
if (thisFrac == 1f) fullyOpenedPanel = panel;
}
}
if (pv.getExpandedHeight() > 0f) {
if (!visible) pv.setVisibility(View.VISIBLE);
} else {
if (visible) pv.setVisibility(View.GONE);
}
}
mPanelExpandedFractionSum /= mPanels.size();
if (fullyOpenedPanel != null && !mTracking) {
go(STATE_OPEN);
onPanelFullyOpened(fullyOpenedPanel);
} else if (fullyClosed && !mTracking && mState != STATE_CLOSED) {
go(STATE_CLOSED);
onAllPanelsCollapsed();
}
if (DEBUG) LOG("panelExpansionChanged: end state=%d [%s%s ]", mState,
(fullyOpenedPanel!=null)?" fullyOpened":"", fullyClosed?" fullyClosed":"");
}
public void collapseAllPanels(boolean animate) {
boolean waiting = false;
for (PanelView pv : mPanels) {
if (animate && !pv.isFullyCollapsed()) {
pv.collapse();
waiting = true;
} else {
pv.setExpandedFraction(0); // just in case
pv.setVisibility(View.GONE);
}
}
if (DEBUG) LOG("collapseAllPanels: animate=%s waiting=%s", animate, waiting);
if (!waiting && mState != STATE_CLOSED) {
// it's possible that nothing animated, so we replicate the termination
// conditions of panelExpansionChanged here
go(STATE_CLOSED);
onAllPanelsCollapsed();
}
}
public void onPanelPeeked() {
if (DEBUG) LOG("onPanelPeeked");
}
public void onAllPanelsCollapsed() {
if (DEBUG) LOG("onAllPanelsCollapsed");
}
public void onPanelFullyOpened(PanelView openPanel) {
if (DEBUG) LOG("onPanelFullyOpened");
}
public void onTrackingStarted(PanelView panel) {
mTracking = true;
if (DEBUG && panel != mTouchingPanel) {
LOG("shouldn't happen: onTrackingStarted(%s) != mTouchingPanel(%s)",
panel, mTouchingPanel);
}
}
public void onTrackingStopped(PanelView panel) {
mTracking = false;
panelExpansionChanged(panel, panel.getExpandedFraction());
}
}