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.view.menu; 18 19 import android.content.Context; 20 import android.content.res.Configuration; 21 import android.content.res.Resources; 22 import android.content.res.TypedArray; 23 import android.graphics.Rect; 24 import android.graphics.drawable.Drawable; 25 import android.text.TextUtils; 26 import android.util.AttributeSet; 27 import android.view.Gravity; 28 import android.view.MotionEvent; 29 import android.view.View; 30 import android.view.accessibility.AccessibilityEvent; 31 import android.widget.TextView; 32 import android.widget.Toast; 33 34 /** 35 * @hide 36 */ 37 public class ActionMenuItemView extends TextView 38 implements MenuView.ItemView, View.OnClickListener, View.OnLongClickListener, 39 ActionMenuView.ActionMenuChildView { 40 private static final String TAG = "ActionMenuItemView"; 41 42 private MenuItemImpl mItemData; 43 private CharSequence mTitle; 44 private Drawable mIcon; 45 private MenuBuilder.ItemInvoker mItemInvoker; 46 47 private boolean mAllowTextWithIcon; 48 private boolean mExpandedFormat; 49 private int mMinWidth; 50 private int mSavedPaddingLeft; 51 52 private static final int MAX_ICON_SIZE = 32; // dp 53 private int mMaxIconSize; 54 ActionMenuItemView(Context context)55 public ActionMenuItemView(Context context) { 56 this(context, null); 57 } 58 ActionMenuItemView(Context context, AttributeSet attrs)59 public ActionMenuItemView(Context context, AttributeSet attrs) { 60 this(context, attrs, 0); 61 } 62 ActionMenuItemView(Context context, AttributeSet attrs, int defStyle)63 public ActionMenuItemView(Context context, AttributeSet attrs, int defStyle) { 64 super(context, attrs, defStyle); 65 final Resources res = context.getResources(); 66 mAllowTextWithIcon = res.getBoolean( 67 com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon); 68 TypedArray a = context.obtainStyledAttributes(attrs, 69 com.android.internal.R.styleable.ActionMenuItemView, 0, 0); 70 mMinWidth = a.getDimensionPixelSize( 71 com.android.internal.R.styleable.ActionMenuItemView_minWidth, 0); 72 a.recycle(); 73 74 final float density = res.getDisplayMetrics().density; 75 mMaxIconSize = (int) (MAX_ICON_SIZE * density + 0.5f); 76 77 setOnClickListener(this); 78 setOnLongClickListener(this); 79 80 mSavedPaddingLeft = -1; 81 } 82 83 @Override onConfigurationChanged(Configuration newConfig)84 public void onConfigurationChanged(Configuration newConfig) { 85 super.onConfigurationChanged(newConfig); 86 87 mAllowTextWithIcon = getContext().getResources().getBoolean( 88 com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon); 89 updateTextButtonVisibility(); 90 } 91 92 @Override setPadding(int l, int t, int r, int b)93 public void setPadding(int l, int t, int r, int b) { 94 mSavedPaddingLeft = l; 95 super.setPadding(l, t, r, b); 96 } 97 getItemData()98 public MenuItemImpl getItemData() { 99 return mItemData; 100 } 101 initialize(MenuItemImpl itemData, int menuType)102 public void initialize(MenuItemImpl itemData, int menuType) { 103 mItemData = itemData; 104 105 setIcon(itemData.getIcon()); 106 setTitle(itemData.getTitleForItemView(this)); // Title only takes effect if there is no icon 107 setId(itemData.getItemId()); 108 109 setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE); 110 setEnabled(itemData.isEnabled()); 111 } 112 onClick(View v)113 public void onClick(View v) { 114 if (mItemInvoker != null) { 115 mItemInvoker.invokeItem(mItemData); 116 } 117 } 118 setItemInvoker(MenuBuilder.ItemInvoker invoker)119 public void setItemInvoker(MenuBuilder.ItemInvoker invoker) { 120 mItemInvoker = invoker; 121 } 122 prefersCondensedTitle()123 public boolean prefersCondensedTitle() { 124 return true; 125 } 126 setCheckable(boolean checkable)127 public void setCheckable(boolean checkable) { 128 // TODO Support checkable action items 129 } 130 setChecked(boolean checked)131 public void setChecked(boolean checked) { 132 // TODO Support checkable action items 133 } 134 setExpandedFormat(boolean expandedFormat)135 public void setExpandedFormat(boolean expandedFormat) { 136 if (mExpandedFormat != expandedFormat) { 137 mExpandedFormat = expandedFormat; 138 if (mItemData != null) { 139 mItemData.actionFormatChanged(); 140 } 141 } 142 } 143 updateTextButtonVisibility()144 private void updateTextButtonVisibility() { 145 boolean visible = !TextUtils.isEmpty(mTitle); 146 visible &= mIcon == null || 147 (mItemData.showsTextAsAction() && (mAllowTextWithIcon || mExpandedFormat)); 148 149 setText(visible ? mTitle : null); 150 } 151 setIcon(Drawable icon)152 public void setIcon(Drawable icon) { 153 mIcon = icon; 154 if (icon != null) { 155 int width = icon.getIntrinsicWidth(); 156 int height = icon.getIntrinsicHeight(); 157 if (width > mMaxIconSize) { 158 final float scale = (float) mMaxIconSize / width; 159 width = mMaxIconSize; 160 height *= scale; 161 } 162 if (height > mMaxIconSize) { 163 final float scale = (float) mMaxIconSize / height; 164 height = mMaxIconSize; 165 width *= scale; 166 } 167 icon.setBounds(0, 0, width, height); 168 } 169 setCompoundDrawables(icon, null, null, null); 170 171 updateTextButtonVisibility(); 172 } 173 hasText()174 public boolean hasText() { 175 return !TextUtils.isEmpty(getText()); 176 } 177 setShortcut(boolean showShortcut, char shortcutKey)178 public void setShortcut(boolean showShortcut, char shortcutKey) { 179 // Action buttons don't show text for shortcut keys. 180 } 181 setTitle(CharSequence title)182 public void setTitle(CharSequence title) { 183 mTitle = title; 184 185 setContentDescription(mTitle); 186 updateTextButtonVisibility(); 187 } 188 189 @Override dispatchPopulateAccessibilityEvent(AccessibilityEvent event)190 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 191 onPopulateAccessibilityEvent(event); 192 return true; 193 } 194 195 @Override onPopulateAccessibilityEvent(AccessibilityEvent event)196 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 197 super.onPopulateAccessibilityEvent(event); 198 final CharSequence cdesc = getContentDescription(); 199 if (!TextUtils.isEmpty(cdesc)) { 200 event.getText().add(cdesc); 201 } 202 } 203 204 @Override dispatchHoverEvent(MotionEvent event)205 public boolean dispatchHoverEvent(MotionEvent event) { 206 // Don't allow children to hover; we want this to be treated as a single component. 207 return onHoverEvent(event); 208 } 209 showsIcon()210 public boolean showsIcon() { 211 return true; 212 } 213 needsDividerBefore()214 public boolean needsDividerBefore() { 215 return hasText() && mItemData.getIcon() == null; 216 } 217 needsDividerAfter()218 public boolean needsDividerAfter() { 219 return hasText(); 220 } 221 222 @Override onLongClick(View v)223 public boolean onLongClick(View v) { 224 if (hasText()) { 225 // Don't show the cheat sheet for items that already show text. 226 return false; 227 } 228 229 final int[] screenPos = new int[2]; 230 final Rect displayFrame = new Rect(); 231 getLocationOnScreen(screenPos); 232 getWindowVisibleDisplayFrame(displayFrame); 233 234 final Context context = getContext(); 235 final int width = getWidth(); 236 final int height = getHeight(); 237 final int midy = screenPos[1] + height / 2; 238 final int screenWidth = context.getResources().getDisplayMetrics().widthPixels; 239 240 Toast cheatSheet = Toast.makeText(context, mItemData.getTitle(), Toast.LENGTH_SHORT); 241 if (midy < displayFrame.height()) { 242 // Show along the top; follow action buttons 243 cheatSheet.setGravity(Gravity.TOP | Gravity.END, 244 screenWidth - screenPos[0] - width / 2, height); 245 } else { 246 // Show along the bottom center 247 cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height); 248 } 249 cheatSheet.show(); 250 return true; 251 } 252 253 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)254 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 255 if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST) { 256 // Fill all available height. 257 heightMeasureSpec = MeasureSpec.makeMeasureSpec( 258 MeasureSpec.getSize(heightMeasureSpec), MeasureSpec.EXACTLY); 259 } 260 final boolean textVisible = hasText(); 261 if (textVisible && mSavedPaddingLeft >= 0) { 262 super.setPadding(mSavedPaddingLeft, getPaddingTop(), 263 getPaddingRight(), getPaddingBottom()); 264 } 265 266 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 267 268 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 269 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 270 final int oldMeasuredWidth = getMeasuredWidth(); 271 final int targetWidth = widthMode == MeasureSpec.AT_MOST ? Math.min(widthSize, mMinWidth) 272 : mMinWidth; 273 274 if (widthMode != MeasureSpec.EXACTLY && mMinWidth > 0 && oldMeasuredWidth < targetWidth) { 275 // Remeasure at exactly the minimum width. 276 super.onMeasure(MeasureSpec.makeMeasureSpec(targetWidth, MeasureSpec.EXACTLY), 277 heightMeasureSpec); 278 } 279 280 if (!textVisible && mIcon != null) { 281 // TextView won't center compound drawables in both dimensions without 282 // a little coercion. Pad in to center the icon after we've measured. 283 final int w = getMeasuredWidth(); 284 final int dw = mIcon.getBounds().width(); 285 super.setPadding((w - dw) / 2, getPaddingTop(), getPaddingRight(), getPaddingBottom()); 286 } 287 } 288 } 289