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 17package android.support.v7.internal.view.menu; 18 19import android.content.Context; 20import android.content.res.Configuration; 21import android.content.res.Resources; 22import android.content.res.TypedArray; 23import android.graphics.Rect; 24import android.graphics.drawable.Drawable; 25import android.os.Build; 26import android.support.v4.view.GravityCompat; 27import android.support.v4.view.ViewCompat; 28import android.support.v7.appcompat.R; 29import android.support.v7.widget.ActionMenuView; 30import android.support.v7.widget.AppCompatTextView; 31import android.support.v7.widget.ListPopupWindow; 32import android.text.TextUtils; 33import android.util.AttributeSet; 34import android.view.Gravity; 35import android.view.MotionEvent; 36import android.view.View; 37import android.widget.Toast; 38 39/** 40 * @hide 41 */ 42public class ActionMenuItemView extends AppCompatTextView 43 implements MenuView.ItemView, View.OnClickListener, View.OnLongClickListener, 44 ActionMenuView.ActionMenuChildView { 45 46 private static final String TAG = "ActionMenuItemView"; 47 48 private MenuItemImpl mItemData; 49 private CharSequence mTitle; 50 private Drawable mIcon; 51 private MenuBuilder.ItemInvoker mItemInvoker; 52 private ListPopupWindow.ForwardingListener mForwardingListener; 53 private PopupCallback mPopupCallback; 54 55 private boolean mAllowTextWithIcon; 56 private boolean mExpandedFormat; 57 private int mMinWidth; 58 private int mSavedPaddingLeft; 59 60 private static final int MAX_ICON_SIZE = 32; // dp 61 private int mMaxIconSize; 62 63 public ActionMenuItemView(Context context) { 64 this(context, null); 65 } 66 67 public ActionMenuItemView(Context context, AttributeSet attrs) { 68 this(context, attrs, 0); 69 } 70 71 public ActionMenuItemView(Context context, AttributeSet attrs, int defStyle) { 72 super(context, attrs, defStyle); 73 final Resources res = context.getResources(); 74 mAllowTextWithIcon = res.getBoolean( 75 R.bool.abc_config_allowActionMenuItemTextWithIcon); 76 TypedArray a = context.obtainStyledAttributes(attrs, 77 R.styleable.ActionMenuItemView, defStyle, 0); 78 mMinWidth = a.getDimensionPixelSize( 79 R.styleable.ActionMenuItemView_android_minWidth, 0); 80 a.recycle(); 81 82 final float density = res.getDisplayMetrics().density; 83 mMaxIconSize = (int) (MAX_ICON_SIZE * density + 0.5f); 84 85 setOnClickListener(this); 86 setOnLongClickListener(this); 87 88 mSavedPaddingLeft = -1; 89 } 90 91 public void onConfigurationChanged(Configuration newConfig) { 92 if (Build.VERSION.SDK_INT >= 8) { 93 super.onConfigurationChanged(newConfig); 94 } 95 96 mAllowTextWithIcon = getContext().getResources().getBoolean( 97 R.bool.abc_config_allowActionMenuItemTextWithIcon); 98 updateTextButtonVisibility(); 99 } 100 101 @Override 102 public void setPadding(int l, int t, int r, int b) { 103 mSavedPaddingLeft = l; 104 super.setPadding(l, t, r, b); 105 } 106 107 public MenuItemImpl getItemData() { 108 return mItemData; 109 } 110 111 public void initialize(MenuItemImpl itemData, int menuType) { 112 mItemData = itemData; 113 114 setIcon(itemData.getIcon()); 115 setTitle(itemData.getTitleForItemView(this)); // Title only takes effect if there is no icon 116 setId(itemData.getItemId()); 117 118 setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE); 119 setEnabled(itemData.isEnabled()); 120 if (itemData.hasSubMenu()) { 121 if (mForwardingListener == null) { 122 mForwardingListener = new ActionMenuItemForwardingListener(); 123 } 124 } 125 } 126 127 @Override 128 public boolean onTouchEvent(MotionEvent e) { 129 if (mItemData.hasSubMenu() && mForwardingListener != null 130 && mForwardingListener.onTouch(this, e)) { 131 return true; 132 } 133 return super.onTouchEvent(e); 134 } 135 136 @Override 137 public void onClick(View v) { 138 if (mItemInvoker != null) { 139 mItemInvoker.invokeItem(mItemData); 140 } 141 } 142 143 public void setItemInvoker(MenuBuilder.ItemInvoker invoker) { 144 mItemInvoker = invoker; 145 } 146 147 public void setPopupCallback(PopupCallback popupCallback) { 148 mPopupCallback = popupCallback; 149 } 150 151 public boolean prefersCondensedTitle() { 152 return true; 153 } 154 155 public void setCheckable(boolean checkable) { 156 // TODO Support checkable action items 157 } 158 159 public void setChecked(boolean checked) { 160 // TODO Support checkable action items 161 } 162 163 public void setExpandedFormat(boolean expandedFormat) { 164 if (mExpandedFormat != expandedFormat) { 165 mExpandedFormat = expandedFormat; 166 if (mItemData != null) { 167 mItemData.actionFormatChanged(); 168 } 169 } 170 } 171 172 private void updateTextButtonVisibility() { 173 boolean visible = !TextUtils.isEmpty(mTitle); 174 visible &= mIcon == null || 175 (mItemData.showsTextAsAction() && (mAllowTextWithIcon || mExpandedFormat)); 176 177 setText(visible ? mTitle : null); 178 } 179 180 public void setIcon(Drawable icon) { 181 mIcon = icon; 182 if (icon != null) { 183 int width = icon.getIntrinsicWidth(); 184 int height = icon.getIntrinsicHeight(); 185 if (width > mMaxIconSize) { 186 final float scale = (float) mMaxIconSize / width; 187 width = mMaxIconSize; 188 height *= scale; 189 } 190 if (height > mMaxIconSize) { 191 final float scale = (float) mMaxIconSize / height; 192 height = mMaxIconSize; 193 width *= scale; 194 } 195 icon.setBounds(0, 0, width, height); 196 } 197 setCompoundDrawables(icon, null, null, null); 198 199 updateTextButtonVisibility(); 200 } 201 202 public boolean hasText() { 203 return !TextUtils.isEmpty(getText()); 204 } 205 206 public void setShortcut(boolean showShortcut, char shortcutKey) { 207 // Action buttons don't show text for shortcut keys. 208 } 209 210 public void setTitle(CharSequence title) { 211 mTitle = title; 212 213 setContentDescription(mTitle); 214 updateTextButtonVisibility(); 215 } 216 217 public boolean showsIcon() { 218 return true; 219 } 220 221 public boolean needsDividerBefore() { 222 return hasText() && mItemData.getIcon() == null; 223 } 224 225 public boolean needsDividerAfter() { 226 return hasText(); 227 } 228 229 @Override 230 public boolean onLongClick(View v) { 231 if (hasText()) { 232 // Don't show the cheat sheet for items that already show text. 233 return false; 234 } 235 236 final int[] screenPos = new int[2]; 237 final Rect displayFrame = new Rect(); 238 getLocationOnScreen(screenPos); 239 getWindowVisibleDisplayFrame(displayFrame); 240 241 final Context context = getContext(); 242 final int width = getWidth(); 243 final int height = getHeight(); 244 final int midy = screenPos[1] + height / 2; 245 int referenceX = screenPos[0] + width / 2; 246 if (ViewCompat.getLayoutDirection(v) == ViewCompat.LAYOUT_DIRECTION_LTR) { 247 final int screenWidth = context.getResources().getDisplayMetrics().widthPixels; 248 referenceX = screenWidth - referenceX; // mirror 249 } 250 Toast cheatSheet = Toast.makeText(context, mItemData.getTitle(), Toast.LENGTH_SHORT); 251 if (midy < displayFrame.height()) { 252 // Show along the top; follow action buttons 253 cheatSheet.setGravity(Gravity.TOP | GravityCompat.END, referenceX, 254 screenPos[1] + height - displayFrame.top); 255 } else { 256 // Show along the bottom center 257 cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height); 258 } 259 cheatSheet.show(); 260 return true; 261 } 262 263 @Override 264 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 265 final boolean textVisible = hasText(); 266 if (textVisible && mSavedPaddingLeft >= 0) { 267 super.setPadding(mSavedPaddingLeft, getPaddingTop(), 268 getPaddingRight(), getPaddingBottom()); 269 } 270 271 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 272 273 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 274 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 275 final int oldMeasuredWidth = getMeasuredWidth(); 276 final int targetWidth = widthMode == MeasureSpec.AT_MOST ? Math.min(widthSize, mMinWidth) 277 : mMinWidth; 278 279 if (widthMode != MeasureSpec.EXACTLY && mMinWidth > 0 && oldMeasuredWidth < targetWidth) { 280 // Remeasure at exactly the minimum width. 281 super.onMeasure(MeasureSpec.makeMeasureSpec(targetWidth, MeasureSpec.EXACTLY), 282 heightMeasureSpec); 283 } 284 285 if (!textVisible && mIcon != null) { 286 // TextView won't center compound drawables in both dimensions without 287 // a little coercion. Pad in to center the icon after we've measured. 288 final int w = getMeasuredWidth(); 289 final int dw = mIcon.getBounds().width(); 290 super.setPadding((w - dw) / 2, getPaddingTop(), getPaddingRight(), getPaddingBottom()); 291 } 292 } 293 294 private class ActionMenuItemForwardingListener extends ListPopupWindow.ForwardingListener { 295 public ActionMenuItemForwardingListener() { 296 super(ActionMenuItemView.this); 297 } 298 299 @Override 300 public ListPopupWindow getPopup() { 301 if (mPopupCallback != null) { 302 return mPopupCallback.getPopup(); 303 } 304 return null; 305 } 306 307 @Override 308 protected boolean onForwardingStarted() { 309 // Call the invoker, then check if the expected popup is showing. 310 if (mItemInvoker != null && mItemInvoker.invokeItem(mItemData)) { 311 final ListPopupWindow popup = getPopup(); 312 return popup != null && popup.isShowing(); 313 } 314 return false; 315 } 316 317 // Do not backport the framework impl here. 318 // The framework's ListPopupWindow uses an animation before performing the item click 319 // after selecting an item. As AppCompat doesn't use an animation, the popup is 320 // dismissed and thus null'ed out before onForwardingStopped() has been called. 321 // This messes up ActionMenuItemView's onForwardingStopped() impl since it will now 322 // return false and make ListPopupWindow think it's still forwarding. 323 } 324 325 public static abstract class PopupCallback { 326 public abstract ListPopupWindow getPopup(); 327 } 328} 329