src/com/android/calculator2/CalculatorEditText.java

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.calculator2;

import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.graphics.Rect;
import android.text.Editable;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.Toast;

public class CalculatorEditText extends EditText {

    public CalculatorEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        setCustomSelectionActionModeCallback(new NoTextSelectionMode());
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);

        InputMethodManager imm = ((InputMethodManager) getContext().
                getSystemService(Context.INPUT_METHOD_SERVICE));
        if (imm != null && imm.isActive(this)) {
            imm.hideSoftInputFromWindow(getApplicationWindowToken(), 0);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getActionMasked() == MotionEvent.ACTION_UP) {
            // Hack to prevent keyboard and insertion handle from showing.
            cancelLongPress();
        }
        return super.onTouchEvent(event);
    }

    @Override
    public boolean performLongClick() {
        final Editable text = getText();
        if (TextUtils.isEmpty(text)) {
            return false;
        }

        copyContent();
        return true;
    }

    private void copyContent() {
        final Editable text = getText();
        setSelection(0, text.length());
        ClipboardManager clipboard = (ClipboardManager) getContext().getSystemService(
                Context.CLIPBOARD_SERVICE);
        clipboard.setPrimaryClip(ClipData.newPlainText(null, text));
        Toast.makeText(getContext(), R.string.text_copied_toast, Toast.LENGTH_SHORT).show();
    }

    class NoTextSelectionMode implements ActionMode.Callback {
        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            return false;
        }

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            copyContent();
            // Make the selection highlight blink
            postDelayed(new Runnable() {
                public void run() {
                    setSelection(getSelectionEnd());
                }
            }, 200);
            // Prevents the selection action mode on double tap.
            return false;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {}

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            return false;
        }
    }
}