ActionMenuItemView.java revision 367ee326058bbee6fc179b8b1eb2174fe7ba8f45
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 com.android.internal.view.menu; 18 19import android.content.Context; 20import android.content.res.Resources; 21import android.content.res.TypedArray; 22import android.graphics.Rect; 23import android.graphics.drawable.Drawable; 24import android.text.TextUtils; 25import android.util.AttributeSet; 26import android.view.Gravity; 27import android.view.MotionEvent; 28import android.view.View; 29import android.view.accessibility.AccessibilityEvent; 30import android.widget.TextView; 31import android.widget.Toast; 32 33/** 34 * @hide 35 */ 36public class ActionMenuItemView extends TextView 37 implements MenuView.ItemView, View.OnClickListener, View.OnLongClickListener, 38 ActionMenuView.ActionMenuChildView { 39 private static final String TAG = "ActionMenuItemView"; 40 41 private MenuItemImpl mItemData; 42 private CharSequence mTitle; 43 private Drawable mIcon; 44 private MenuBuilder.ItemInvoker mItemInvoker; 45 46 private boolean mAllowTextWithIcon; 47 private boolean mExpandedFormat; 48 private int mMinWidth; 49 private int mSavedPaddingLeft; 50 51 public ActionMenuItemView(Context context) { 52 this(context, null); 53 } 54 55 public ActionMenuItemView(Context context, AttributeSet attrs) { 56 this(context, attrs, 0); 57 } 58 59 public ActionMenuItemView(Context context, AttributeSet attrs, int defStyle) { 60 super(context, attrs, defStyle); 61 final Resources res = context.getResources(); 62 mAllowTextWithIcon = res.getBoolean( 63 com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon); 64 TypedArray a = context.obtainStyledAttributes(attrs, 65 com.android.internal.R.styleable.ActionMenuItemView, 0, 0); 66 mMinWidth = a.getDimensionPixelSize( 67 com.android.internal.R.styleable.ActionMenuItemView_minWidth, 0); 68 a.recycle(); 69 70 setOnClickListener(this); 71 setOnLongClickListener(this); 72 73 mSavedPaddingLeft = -1; 74 } 75 76 @Override 77 public void setPadding(int l, int t, int r, int b) { 78 mSavedPaddingLeft = l; 79 super.setPadding(l, t, r, b); 80 } 81 82 public MenuItemImpl getItemData() { 83 return mItemData; 84 } 85 86 public void initialize(MenuItemImpl itemData, int menuType) { 87 mItemData = itemData; 88 89 setIcon(itemData.getIcon()); 90 setTitle(itemData.getTitleForItemView(this)); // Title only takes effect if there is no icon 91 setId(itemData.getItemId()); 92 93 setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE); 94 setEnabled(itemData.isEnabled()); 95 } 96 97 public void onClick(View v) { 98 if (mItemInvoker != null) { 99 mItemInvoker.invokeItem(mItemData); 100 } 101 } 102 103 public void setItemInvoker(MenuBuilder.ItemInvoker invoker) { 104 mItemInvoker = invoker; 105 } 106 107 public boolean prefersCondensedTitle() { 108 return true; 109 } 110 111 public void setCheckable(boolean checkable) { 112 // TODO Support checkable action items 113 } 114 115 public void setChecked(boolean checked) { 116 // TODO Support checkable action items 117 } 118 119 public void setExpandedFormat(boolean expandedFormat) { 120 if (mExpandedFormat != expandedFormat) { 121 mExpandedFormat = expandedFormat; 122 if (mItemData != null) { 123 mItemData.actionFormatChanged(); 124 } 125 } 126 } 127 128 private void updateTextButtonVisibility() { 129 boolean visible = !TextUtils.isEmpty(mTitle); 130 visible &= mIcon == null || 131 (mItemData.showsTextAsAction() && (mAllowTextWithIcon || mExpandedFormat)); 132 133 setText(visible ? mTitle : null); 134 } 135 136 public void setIcon(Drawable icon) { 137 mIcon = icon; 138 setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null); 139 140 updateTextButtonVisibility(); 141 } 142 143 public boolean hasText() { 144 return !TextUtils.isEmpty(getText()); 145 } 146 147 public void setShortcut(boolean showShortcut, char shortcutKey) { 148 // Action buttons don't show text for shortcut keys. 149 } 150 151 public void setTitle(CharSequence title) { 152 mTitle = title; 153 154 setContentDescription(mTitle); 155 updateTextButtonVisibility(); 156 } 157 158 @Override 159 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 160 onPopulateAccessibilityEvent(event); 161 return true; 162 } 163 164 @Override 165 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 166 super.onPopulateAccessibilityEvent(event); 167 final CharSequence cdesc = getContentDescription(); 168 if (!TextUtils.isEmpty(cdesc)) { 169 event.getText().add(cdesc); 170 } 171 } 172 173 @Override 174 public boolean dispatchHoverEvent(MotionEvent event) { 175 // Don't allow children to hover; we want this to be treated as a single component. 176 return onHoverEvent(event); 177 } 178 179 public boolean showsIcon() { 180 return true; 181 } 182 183 public boolean needsDividerBefore() { 184 return hasText() && mItemData.getIcon() == null; 185 } 186 187 public boolean needsDividerAfter() { 188 return hasText(); 189 } 190 191 @Override 192 public boolean onLongClick(View v) { 193 if (hasText()) { 194 // Don't show the cheat sheet for items that already show text. 195 return false; 196 } 197 198 final int[] screenPos = new int[2]; 199 final Rect displayFrame = new Rect(); 200 getLocationOnScreen(screenPos); 201 getWindowVisibleDisplayFrame(displayFrame); 202 203 final Context context = getContext(); 204 final int width = getWidth(); 205 final int height = getHeight(); 206 final int midy = screenPos[1] + height / 2; 207 final int screenWidth = context.getResources().getDisplayMetrics().widthPixels; 208 209 Toast cheatSheet = Toast.makeText(context, mItemData.getTitle(), Toast.LENGTH_SHORT); 210 if (midy < displayFrame.height()) { 211 // Show along the top; follow action buttons 212 cheatSheet.setGravity(Gravity.TOP | Gravity.RIGHT, 213 screenWidth - screenPos[0] - width / 2, height); 214 } else { 215 // Show along the bottom center 216 cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height); 217 } 218 cheatSheet.show(); 219 return true; 220 } 221 222 @Override 223 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 224 final boolean textVisible = hasText(); 225 if (textVisible && mSavedPaddingLeft >= 0) { 226 super.setPadding(mSavedPaddingLeft, getPaddingTop(), 227 getPaddingRight(), getPaddingBottom()); 228 } 229 230 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 231 232 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 233 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 234 final int oldMeasuredWidth = getMeasuredWidth(); 235 final int targetWidth = widthMode == MeasureSpec.AT_MOST ? Math.min(widthSize, mMinWidth) 236 : mMinWidth; 237 238 if (widthMode != MeasureSpec.EXACTLY && mMinWidth > 0 && oldMeasuredWidth < targetWidth) { 239 // Remeasure at exactly the minimum width. 240 super.onMeasure(MeasureSpec.makeMeasureSpec(targetWidth, MeasureSpec.EXACTLY), 241 heightMeasureSpec); 242 } 243 244 if (!textVisible && mIcon != null) { 245 // TextView won't center compound drawables in both dimensions without 246 // a little coercion. Pad in to center the icon after we've measured. 247 final int w = getMeasuredWidth(); 248 final int dw = mIcon.getIntrinsicWidth(); 249 super.setPadding((w - dw) / 2, getPaddingTop(), getPaddingRight(), getPaddingBottom()); 250 } 251 } 252} 253