PanelBar.java revision d0b2f7ddcac251acfe88092ecef4abb63b3e248b 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.statusbar.phone;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.util.Log;
22import android.view.MotionEvent;
23import android.view.View;
24import android.widget.FrameLayout;
25
26import java.util.ArrayList;
27
28public class PanelBar extends FrameLayout {
29    public static final boolean DEBUG = false;
30    public static final String TAG = PanelBar.class.getSimpleName();
31    public static final void LOG(String fmt, Object... args) {
32        if (!DEBUG) return;
33        Log.v(TAG, String.format(fmt, args));
34    }
35
36    public static final int STATE_CLOSED = 0;
37    public static final int STATE_OPENING = 1;
38    public static final int STATE_OPEN = 2;
39
40    PanelHolder mPanelHolder;
41    ArrayList<PanelView> mPanels = new ArrayList<PanelView>();
42    PanelView mTouchingPanel;
43    private int mState = STATE_CLOSED;
44    private boolean mTracking;
45
46    float mPanelExpandedFractionSum;
47
48    public void go(int state) {
49        if (DEBUG) LOG("go state: %d -> %d", mState, state);
50        mState = state;
51    }
52
53    public PanelBar(Context context, AttributeSet attrs) {
54        super(context, attrs);
55    }
56
57    @Override
58    protected void onFinishInflate() {
59        super.onFinishInflate();
60    }
61
62    public void addPanel(PanelView pv) {
63        mPanels.add(pv);
64        pv.setBar(this);
65    }
66
67    public void setPanelHolder(PanelHolder ph) {
68        if (ph == null) {
69            Log.e(TAG, "setPanelHolder: null PanelHolder", new Throwable());
70            return;
71        }
72        ph.setBar(this);
73        mPanelHolder = ph;
74        final int N = ph.getChildCount();
75        for (int i=0; i<N; i++) {
76            final View v = ph.getChildAt(i);
77            if (v != null && v instanceof PanelView) {
78                addPanel((PanelView) v);
79            }
80        }
81    }
82
83    public void setBouncerShowing(boolean showing) {
84        if (mPanelHolder != null) {
85            mPanelHolder.setImportantForAccessibility(
86                    showing ? IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
87                            : IMPORTANT_FOR_ACCESSIBILITY_AUTO);
88        }
89    }
90
91    public float getBarHeight() {
92        return getMeasuredHeight();
93    }
94
95    public PanelView selectPanelForTouch(MotionEvent touch) {
96        final int N = mPanels.size();
97        return mPanels.get((int)(N * touch.getX() / getMeasuredWidth()));
98    }
99
100    public boolean panelsEnabled() {
101        return true;
102    }
103
104    @Override
105    public boolean onTouchEvent(MotionEvent event) {
106        // Allow subclasses to implement enable/disable semantics
107        if (!panelsEnabled()) {
108            if (event.getAction() == MotionEvent.ACTION_DOWN) {
109                Log.v(TAG, String.format("onTouch: all panels disabled, ignoring touch at (%d,%d)",
110                        (int) event.getX(), (int) event.getY()));
111            }
112            return false;
113        }
114
115        // figure out which panel needs to be talked to here
116        if (event.getAction() == MotionEvent.ACTION_DOWN) {
117            final PanelView panel = selectPanelForTouch(event);
118            if (panel == null) {
119                // panel is not there, so we'll eat the gesture
120                Log.v(TAG, String.format("onTouch: no panel for touch at (%d,%d)",
121                        (int) event.getX(), (int) event.getY()));
122                mTouchingPanel = null;
123                return true;
124            }
125            boolean enabled = panel.isEnabled();
126            if (DEBUG) LOG("PanelBar.onTouch: state=%d ACTION_DOWN: panel %s %s", mState, panel,
127                    (enabled ? "" : " (disabled)"));
128            if (!enabled) {
129                // panel is disabled, so we'll eat the gesture
130                Log.v(TAG, String.format(
131                        "onTouch: panel (%s) is disabled, ignoring touch at (%d,%d)",
132                        panel, (int) event.getX(), (int) event.getY()));
133                mTouchingPanel = null;
134                return true;
135            }
136            startOpeningPanel(panel);
137        }
138        final boolean result = mTouchingPanel != null
139                ? mTouchingPanel.onTouchEvent(event)
140                : true;
141        return result;
142    }
143
144    // called from PanelView when self-expanding, too
145    public void startOpeningPanel(PanelView panel) {
146        if (DEBUG) LOG("startOpeningPanel: " + panel);
147        mTouchingPanel = panel;
148        mPanelHolder.setSelectedPanel(mTouchingPanel);
149        for (PanelView pv : mPanels) {
150            if (pv != panel) {
151                pv.collapse(false /* delayed */, 1.0f /* speedUpFactor */);
152            }
153        }
154    }
155
156    /**
157     * @param panel the panel which changed its expansion state
158     * @param frac the fraction from the expansion in [0, 1]
159     * @param expanded whether the panel is currently expanded; this is independent from the
160     *                 fraction as the panel also might be expanded if the fraction is 0
161     */
162    public void panelExpansionChanged(PanelView panel, float frac, boolean expanded) {
163        boolean fullyClosed = true;
164        PanelView fullyOpenedPanel = null;
165        if (DEBUG) LOG("panelExpansionChanged: start state=%d panel=%s", mState, panel.getName());
166        mPanelExpandedFractionSum = 0f;
167        for (PanelView pv : mPanels) {
168            pv.setVisibility(expanded ? View.VISIBLE : View.INVISIBLE);
169            // adjust any other panels that may be partially visible
170            if (expanded) {
171                if (mState == STATE_CLOSED) {
172                    go(STATE_OPENING);
173                    onPanelPeeked();
174                }
175                fullyClosed = false;
176                final float thisFrac = pv.getExpandedFraction();
177                mPanelExpandedFractionSum += thisFrac;
178                if (DEBUG) LOG("panelExpansionChanged:  -> %s: f=%.1f", pv.getName(), thisFrac);
179                if (panel == pv) {
180                    if (thisFrac == 1f) fullyOpenedPanel = panel;
181                }
182            }
183        }
184        mPanelExpandedFractionSum /= mPanels.size();
185        if (fullyOpenedPanel != null && !mTracking) {
186            go(STATE_OPEN);
187            onPanelFullyOpened(fullyOpenedPanel);
188        } else if (fullyClosed && !mTracking && mState != STATE_CLOSED) {
189            go(STATE_CLOSED);
190            onAllPanelsCollapsed();
191        }
192
193        if (DEBUG) LOG("panelExpansionChanged: end state=%d [%s%s ]", mState,
194                (fullyOpenedPanel!=null)?" fullyOpened":"", fullyClosed?" fullyClosed":"");
195    }
196
197    public void collapseAllPanels(boolean animate, boolean delayed, float speedUpFactor) {
198        boolean waiting = false;
199        for (PanelView pv : mPanels) {
200            if (animate && !pv.isFullyCollapsed()) {
201                pv.collapse(delayed, speedUpFactor);
202                waiting = true;
203            } else {
204                pv.resetViews();
205                pv.setExpandedFraction(0); // just in case
206                pv.cancelPeek();
207            }
208        }
209        if (DEBUG) LOG("collapseAllPanels: animate=%s waiting=%s", animate, waiting);
210        if (!waiting && mState != STATE_CLOSED) {
211            // it's possible that nothing animated, so we replicate the termination
212            // conditions of panelExpansionChanged here
213            go(STATE_CLOSED);
214            onAllPanelsCollapsed();
215        }
216    }
217
218    public void onPanelPeeked() {
219        if (DEBUG) LOG("onPanelPeeked");
220    }
221
222    public void onAllPanelsCollapsed() {
223        if (DEBUG) LOG("onAllPanelsCollapsed");
224    }
225
226    public void onPanelFullyOpened(PanelView openPanel) {
227        if (DEBUG) LOG("onPanelFullyOpened");
228    }
229
230    public void onTrackingStarted(PanelView panel) {
231        mTracking = true;
232        if (DEBUG && panel != mTouchingPanel) {
233            LOG("shouldn't happen: onTrackingStarted(%s) != mTouchingPanel(%s)",
234                    panel, mTouchingPanel);
235        }
236    }
237
238    public void onTrackingStopped(PanelView panel, boolean expand) {
239        mTracking = false;
240    }
241
242    public void onExpandingFinished() {
243
244    }
245
246    public void onClosingFinished() {
247
248    }
249}
250