1 /* 2 * Copyright (C) 2010 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 17 package com.android.internal.widget; 18 19 import android.app.ActionBar; 20 import android.content.Context; 21 import android.content.res.TypedArray; 22 import android.graphics.Canvas; 23 import android.graphics.drawable.Drawable; 24 import android.util.AttributeSet; 25 import android.view.ActionMode; 26 import android.view.MotionEvent; 27 import android.view.View; 28 import android.view.ViewGroup; 29 import android.widget.FrameLayout; 30 31 /** 32 * This class acts as a container for the action bar view and action mode context views. 33 * It applies special styles as needed to help handle animated transitions between them. 34 * @hide 35 */ 36 public class ActionBarContainer extends FrameLayout { 37 private boolean mIsTransitioning; 38 private View mTabContainer; 39 private ActionBarView mActionBarView; 40 41 private Drawable mBackground; 42 private Drawable mStackedBackground; 43 private Drawable mSplitBackground; 44 private boolean mIsSplit; 45 private boolean mIsStacked; 46 47 public ActionBarContainer(Context context) { 48 this(context, null); 49 } 50 51 public ActionBarContainer(Context context, AttributeSet attrs) { 52 super(context, attrs); 53 54 setBackgroundDrawable(null); 55 56 TypedArray a = context.obtainStyledAttributes(attrs, 57 com.android.internal.R.styleable.ActionBar); 58 mBackground = a.getDrawable(com.android.internal.R.styleable.ActionBar_background); 59 mStackedBackground = a.getDrawable( 60 com.android.internal.R.styleable.ActionBar_backgroundStacked); 61 62 if (getId() == com.android.internal.R.id.split_action_bar) { 63 mIsSplit = true; 64 mSplitBackground = a.getDrawable( 65 com.android.internal.R.styleable.ActionBar_backgroundSplit); 66 } 67 a.recycle(); 68 69 setWillNotDraw(mIsSplit ? mSplitBackground == null : 70 mBackground == null && mStackedBackground == null); 71 } 72 73 @Override 74 public void onFinishInflate() { 75 super.onFinishInflate(); 76 mActionBarView = (ActionBarView) findViewById(com.android.internal.R.id.action_bar); 77 } 78 79 public void setPrimaryBackground(Drawable bg) { 80 if (mBackground != null) { 81 mBackground.setCallback(null); 82 unscheduleDrawable(mBackground); 83 } 84 mBackground = bg; 85 if (bg != null) { 86 bg.setCallback(this); 87 if (mActionBarView != null) { 88 mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(), 89 mActionBarView.getRight(), mActionBarView.getBottom()); 90 } 91 } 92 setWillNotDraw(mIsSplit ? mSplitBackground == null : 93 mBackground == null && mStackedBackground == null); 94 invalidate(); 95 } 96 97 public void setStackedBackground(Drawable bg) { 98 if (mStackedBackground != null) { 99 mStackedBackground.setCallback(null); 100 unscheduleDrawable(mStackedBackground); 101 } 102 mStackedBackground = bg; 103 if (bg != null) { 104 bg.setCallback(this); 105 if ((mIsStacked && mStackedBackground != null)) { 106 mStackedBackground.setBounds(mTabContainer.getLeft(), mTabContainer.getTop(), 107 mTabContainer.getRight(), mTabContainer.getBottom()); 108 } 109 } 110 setWillNotDraw(mIsSplit ? mSplitBackground == null : 111 mBackground == null && mStackedBackground == null); 112 invalidate(); 113 } 114 115 public void setSplitBackground(Drawable bg) { 116 if (mSplitBackground != null) { 117 mSplitBackground.setCallback(null); 118 unscheduleDrawable(mSplitBackground); 119 } 120 mSplitBackground = bg; 121 if (bg != null) { 122 bg.setCallback(this); 123 if (mIsSplit && mSplitBackground != null) { 124 mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight()); 125 } 126 } 127 setWillNotDraw(mIsSplit ? mSplitBackground == null : 128 mBackground == null && mStackedBackground == null); 129 invalidate(); 130 } 131 132 @Override 133 public void setVisibility(int visibility) { 134 super.setVisibility(visibility); 135 final boolean isVisible = visibility == VISIBLE; 136 if (mBackground != null) mBackground.setVisible(isVisible, false); 137 if (mStackedBackground != null) mStackedBackground.setVisible(isVisible, false); 138 if (mSplitBackground != null) mSplitBackground.setVisible(isVisible, false); 139 } 140 141 @Override 142 protected boolean verifyDrawable(Drawable who) { 143 return (who == mBackground && !mIsSplit) || (who == mStackedBackground && mIsStacked) || 144 (who == mSplitBackground && mIsSplit) || super.verifyDrawable(who); 145 } 146 147 @Override 148 protected void drawableStateChanged() { 149 super.drawableStateChanged(); 150 if (mBackground != null && mBackground.isStateful()) { 151 mBackground.setState(getDrawableState()); 152 } 153 if (mStackedBackground != null && mStackedBackground.isStateful()) { 154 mStackedBackground.setState(getDrawableState()); 155 } 156 if (mSplitBackground != null && mSplitBackground.isStateful()) { 157 mSplitBackground.setState(getDrawableState()); 158 } 159 } 160 161 @Override 162 public void jumpDrawablesToCurrentState() { 163 super.jumpDrawablesToCurrentState(); 164 if (mBackground != null) { 165 mBackground.jumpToCurrentState(); 166 } 167 if (mStackedBackground != null) { 168 mStackedBackground.jumpToCurrentState(); 169 } 170 if (mSplitBackground != null) { 171 mSplitBackground.jumpToCurrentState(); 172 } 173 } 174 175 /** 176 * @hide 177 */ 178 @Override 179 public void onResolveDrawables(int layoutDirection) { 180 super.onResolveDrawables(layoutDirection); 181 if (mBackground != null) { 182 mBackground.setLayoutDirection(layoutDirection); 183 } 184 if (mStackedBackground != null) { 185 mStackedBackground.setLayoutDirection(layoutDirection); 186 } 187 if (mSplitBackground != null) { 188 mSplitBackground.setLayoutDirection(layoutDirection); 189 } 190 } 191 192 /** 193 * Set the action bar into a "transitioning" state. While transitioning 194 * the bar will block focus and touch from all of its descendants. This 195 * prevents the user from interacting with the bar while it is animating 196 * in or out. 197 * 198 * @param isTransitioning true if the bar is currently transitioning, false otherwise. 199 */ 200 public void setTransitioning(boolean isTransitioning) { 201 mIsTransitioning = isTransitioning; 202 setDescendantFocusability(isTransitioning ? FOCUS_BLOCK_DESCENDANTS 203 : FOCUS_AFTER_DESCENDANTS); 204 } 205 206 @Override 207 public boolean onInterceptTouchEvent(MotionEvent ev) { 208 return mIsTransitioning || super.onInterceptTouchEvent(ev); 209 } 210 211 @Override 212 public boolean onTouchEvent(MotionEvent ev) { 213 super.onTouchEvent(ev); 214 215 // An action bar always eats touch events. 216 return true; 217 } 218 219 @Override 220 public boolean onHoverEvent(MotionEvent ev) { 221 super.onHoverEvent(ev); 222 223 // An action bar always eats hover events. 224 return true; 225 } 226 227 public void setTabContainer(ScrollingTabContainerView tabView) { 228 if (mTabContainer != null) { 229 removeView(mTabContainer); 230 } 231 mTabContainer = tabView; 232 if (tabView != null) { 233 addView(tabView); 234 final ViewGroup.LayoutParams lp = tabView.getLayoutParams(); 235 lp.width = LayoutParams.MATCH_PARENT; 236 lp.height = LayoutParams.WRAP_CONTENT; 237 tabView.setAllowCollapse(false); 238 } 239 } 240 241 public View getTabContainer() { 242 return mTabContainer; 243 } 244 245 @Override 246 public void onDraw(Canvas canvas) { 247 if (getWidth() == 0 || getHeight() == 0) { 248 return; 249 } 250 251 if (mIsSplit) { 252 if (mSplitBackground != null) mSplitBackground.draw(canvas); 253 } else { 254 if (mBackground != null) { 255 mBackground.draw(canvas); 256 } 257 if (mStackedBackground != null && mIsStacked) { 258 mStackedBackground.draw(canvas); 259 } 260 } 261 } 262 263 @Override 264 public ActionMode startActionModeForChild(View child, ActionMode.Callback callback) { 265 // No starting an action mode for an action bar child! (Where would it go?) 266 return null; 267 } 268 269 @Override 270 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 271 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 272 273 if (mActionBarView == null) return; 274 275 final LayoutParams lp = (LayoutParams) mActionBarView.getLayoutParams(); 276 final int actionBarViewHeight = mActionBarView.isCollapsed() ? 0 : 277 mActionBarView.getMeasuredHeight() + lp.topMargin + lp.bottomMargin; 278 279 if (mTabContainer != null && mTabContainer.getVisibility() != GONE) { 280 final int mode = MeasureSpec.getMode(heightMeasureSpec); 281 if (mode == MeasureSpec.AT_MOST) { 282 final int maxHeight = MeasureSpec.getSize(heightMeasureSpec); 283 setMeasuredDimension(getMeasuredWidth(), 284 Math.min(actionBarViewHeight + mTabContainer.getMeasuredHeight(), 285 maxHeight)); 286 } 287 } 288 } 289 290 @Override 291 public void onLayout(boolean changed, int l, int t, int r, int b) { 292 super.onLayout(changed, l, t, r, b); 293 294 final boolean hasTabs = mTabContainer != null && mTabContainer.getVisibility() != GONE; 295 296 if (mTabContainer != null && mTabContainer.getVisibility() != GONE) { 297 final int containerHeight = getMeasuredHeight(); 298 final int tabHeight = mTabContainer.getMeasuredHeight(); 299 300 if ((mActionBarView.getDisplayOptions() & ActionBar.DISPLAY_SHOW_HOME) == 0) { 301 // Not showing home, put tabs on top. 302 final int count = getChildCount(); 303 for (int i = 0; i < count; i++) { 304 final View child = getChildAt(i); 305 306 if (child == mTabContainer) continue; 307 308 if (!mActionBarView.isCollapsed()) { 309 child.offsetTopAndBottom(tabHeight); 310 } 311 } 312 mTabContainer.layout(l, 0, r, tabHeight); 313 } else { 314 mTabContainer.layout(l, containerHeight - tabHeight, r, containerHeight); 315 } 316 } 317 318 boolean needsInvalidate = false; 319 if (mIsSplit) { 320 if (mSplitBackground != null) { 321 mSplitBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight()); 322 needsInvalidate = true; 323 } 324 } else { 325 if (mBackground != null) { 326 mBackground.setBounds(mActionBarView.getLeft(), mActionBarView.getTop(), 327 mActionBarView.getRight(), mActionBarView.getBottom()); 328 needsInvalidate = true; 329 } 330 if ((mIsStacked = hasTabs && mStackedBackground != null)) { 331 mStackedBackground.setBounds(mTabContainer.getLeft(), mTabContainer.getTop(), 332 mTabContainer.getRight(), mTabContainer.getBottom()); 333 needsInvalidate = true; 334 } 335 } 336 337 if (needsInvalidate) { 338 invalidate(); 339 } 340 } 341 } 342