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.Resources;
21import android.content.res.TypedArray;
22import android.graphics.Rect;
23import android.graphics.drawable.Drawable;
24import android.support.v7.appcompat.R;
25import android.support.v7.internal.widget.CompatTextView;
26import android.text.TextUtils;
27import android.text.method.TransformationMethod;
28import android.util.AttributeSet;
29import android.view.Gravity;
30import android.view.View;
31import android.widget.TextView;
32import android.widget.Toast;
33
34import java.util.Locale;
35
36/**
37 * @hide
38 */
39public class ActionMenuItemView extends CompatTextView
40        implements MenuView.ItemView, View.OnClickListener, View.OnLongClickListener,
41        ActionMenuView.ActionMenuChildView {
42
43    private static final String TAG = "ActionMenuItemView";
44
45    private MenuItemImpl mItemData;
46    private CharSequence mTitle;
47    private Drawable mIcon;
48    private MenuBuilder.ItemInvoker mItemInvoker;
49
50    private boolean mAllowTextWithIcon;
51    private boolean mExpandedFormat;
52    private int mMinWidth;
53    private int mSavedPaddingLeft;
54
55    public ActionMenuItemView(Context context) {
56        this(context, null);
57    }
58
59    public ActionMenuItemView(Context context, AttributeSet attrs) {
60        this(context, attrs, 0);
61    }
62
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                android.support.v7.appcompat.R.bool.abc_config_allowActionMenuItemTextWithIcon);
68        TypedArray a = context.obtainStyledAttributes(attrs,
69                android.support.v7.appcompat.R.styleable.ActionMenuItemView, 0, 0);
70        mMinWidth = a.getDimensionPixelSize(
71                R.styleable.ActionMenuItemView_android_minWidth, 0);
72        a.recycle();
73
74        setOnClickListener(this);
75        setOnLongClickListener(this);
76
77        setTransformationMethod(new AllCapsTransformationMethod());
78
79        mSavedPaddingLeft = -1;
80    }
81
82    @Override
83    public void setPadding(int l, int t, int r, int b) {
84        mSavedPaddingLeft = l;
85        super.setPadding(l, t, r, b);
86    }
87
88    public MenuItemImpl getItemData() {
89        return mItemData;
90    }
91
92    public void initialize(MenuItemImpl itemData, int menuType) {
93        mItemData = itemData;
94
95        setIcon(itemData.getIcon());
96        setTitle(itemData.getTitleForItemView(this)); // Title only takes effect if there is no icon
97        setId(itemData.getItemId());
98
99        setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE);
100        setEnabled(itemData.isEnabled());
101    }
102
103    public void onClick(View v) {
104        if (mItemInvoker != null) {
105            mItemInvoker.invokeItem(mItemData);
106        }
107    }
108
109    public void setItemInvoker(MenuBuilder.ItemInvoker invoker) {
110        mItemInvoker = invoker;
111    }
112
113    public boolean prefersCondensedTitle() {
114        return true;
115    }
116
117    public void setCheckable(boolean checkable) {
118        // TODO Support checkable action items
119    }
120
121    public void setChecked(boolean checked) {
122        // TODO Support checkable action items
123    }
124
125    public void setExpandedFormat(boolean expandedFormat) {
126        if (mExpandedFormat != expandedFormat) {
127            mExpandedFormat = expandedFormat;
128            if (mItemData != null) {
129                mItemData.actionFormatChanged();
130            }
131        }
132    }
133
134    private void updateTextButtonVisibility() {
135        boolean visible = !TextUtils.isEmpty(mTitle);
136        visible &= mIcon == null ||
137                (mItemData.showsTextAsAction() && (mAllowTextWithIcon || mExpandedFormat));
138
139        setText(visible ? mTitle : null);
140    }
141
142    public void setIcon(Drawable icon) {
143        mIcon = icon;
144        setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null);
145
146        updateTextButtonVisibility();
147    }
148
149    public boolean hasText() {
150        return !TextUtils.isEmpty(getText());
151    }
152
153    public void setShortcut(boolean showShortcut, char shortcutKey) {
154        // Action buttons don't show text for shortcut keys.
155    }
156
157    public void setTitle(CharSequence title) {
158        mTitle = title;
159
160        setContentDescription(mTitle);
161        updateTextButtonVisibility();
162    }
163
164    public boolean showsIcon() {
165        return true;
166    }
167
168    public boolean needsDividerBefore() {
169        return hasText() && mItemData.getIcon() == null;
170    }
171
172    public boolean needsDividerAfter() {
173        return hasText();
174    }
175
176    @Override
177    public boolean onLongClick(View v) {
178        if (hasText()) {
179            // Don't show the cheat sheet for items that already show text.
180            return false;
181        }
182
183        final int[] screenPos = new int[2];
184        final Rect displayFrame = new Rect();
185        getLocationOnScreen(screenPos);
186        getWindowVisibleDisplayFrame(displayFrame);
187
188        final Context context = getContext();
189        final int width = getWidth();
190        final int height = getHeight();
191        final int midy = screenPos[1] + height / 2;
192        final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
193
194        Toast cheatSheet = Toast.makeText(context, mItemData.getTitle(), Toast.LENGTH_SHORT);
195        if (midy < displayFrame.height()) {
196            // Show along the top; follow action buttons
197            cheatSheet.setGravity(Gravity.TOP | Gravity.RIGHT,
198                    screenWidth - screenPos[0] - width / 2, height);
199        } else {
200            // Show along the bottom center
201            cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height);
202        }
203        cheatSheet.show();
204        return true;
205    }
206
207    @Override
208    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
209        final boolean textVisible = hasText();
210        if (textVisible && mSavedPaddingLeft >= 0) {
211            super.setPadding(mSavedPaddingLeft, getPaddingTop(),
212                    getPaddingRight(), getPaddingBottom());
213        }
214
215        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
216
217        final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
218        final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
219        final int oldMeasuredWidth = getMeasuredWidth();
220        final int targetWidth = widthMode == MeasureSpec.AT_MOST ? Math.min(widthSize, mMinWidth)
221                : mMinWidth;
222
223        if (widthMode != MeasureSpec.EXACTLY && mMinWidth > 0 && oldMeasuredWidth < targetWidth) {
224            // Remeasure at exactly the minimum width.
225            super.onMeasure(MeasureSpec.makeMeasureSpec(targetWidth, MeasureSpec.EXACTLY),
226                    heightMeasureSpec);
227        }
228
229        if (!textVisible && mIcon != null) {
230            // TextView won't center compound drawables in both dimensions without
231            // a little coercion. Pad in to center the icon after we've measured.
232            final int w = getMeasuredWidth();
233            final int dw = mIcon.getIntrinsicWidth();
234            super.setPadding((w - dw) / 2, getPaddingTop(), getPaddingRight(), getPaddingBottom());
235        }
236    }
237
238    private class AllCapsTransformationMethod implements TransformationMethod {
239        private Locale mLocale;
240
241        public AllCapsTransformationMethod() {
242            mLocale = getContext().getResources().getConfiguration().locale;
243        }
244
245        @Override
246        public CharSequence getTransformation(CharSequence source, View view) {
247            return source != null ? source.toString().toUpperCase(mLocale) : null;
248        }
249
250        @Override
251        public void onFocusChanged(View view, CharSequence sourceText, boolean focused,
252                int direction, Rect previouslyFocusedRect) {
253        }
254    }
255}
256