sl4a/ScriptingLayerForAndroid/src/com/googlecode/android_scripting/widget/NumberPickerButton.java

/*
 * Copyright (C) 2008 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.googlecode.android_scripting.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.ImageButton;

import com.googlecode.android_scripting.R;

/**
 * This class exists purely to cancel long click events.
 */
public class NumberPickerButton extends ImageButton {

  private NumberPicker mNumberPicker;

  public NumberPickerButton(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  public NumberPickerButton(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public NumberPickerButton(Context context) {
    super(context);
  }

  public void setNumberPicker(NumberPicker picker) {
    mNumberPicker = picker;
  }

  @Override
  public boolean onTouchEvent(MotionEvent event) {
    cancelLongpressIfRequired(event);
    return super.onTouchEvent(event);
  }

  @Override
  public boolean onTrackballEvent(MotionEvent event) {
    cancelLongpressIfRequired(event);
    return super.onTrackballEvent(event);
  }

  @Override
  public boolean onKeyUp(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER) || (keyCode == KeyEvent.KEYCODE_ENTER)) {
      cancelLongpress();
    }
    return super.onKeyUp(keyCode, event);
  }

  private void cancelLongpressIfRequired(MotionEvent event) {
    if ((event.getAction() == MotionEvent.ACTION_CANCEL)
        || (event.getAction() == MotionEvent.ACTION_UP)) {
      cancelLongpress();
    }
  }

  private void cancelLongpress() {
    if (R.id.increment == getId()) {
      mNumberPicker.cancelIncrement();
    } else if (R.id.decrement == getId()) {
      mNumberPicker.cancelDecrement();
    }
  }
}