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Android example source code file (ZoomButton.java)
The ZoomButton.java Android example source code/* * 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 android.widget; import android.content.Context; import android.os.Handler; import android.util.AttributeSet; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.View.OnLongClickListener; public class ZoomButton extends ImageButton implements OnLongClickListener { private final Handler mHandler; private final Runnable mRunnable = new Runnable() { public void run() { if ((mOnClickListener != null) && mIsInLongpress && isEnabled()) { mOnClickListener.onClick(ZoomButton.this); mHandler.postDelayed(this, mZoomSpeed); } } }; private long mZoomSpeed = 1000; private boolean mIsInLongpress; public ZoomButton(Context context) { this(context, null); } public ZoomButton(Context context, AttributeSet attrs) { this(context, attrs, 0); } public ZoomButton(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); mHandler = new Handler(); setOnLongClickListener(this); } @Override public boolean onTouchEvent(MotionEvent event) { if ((event.getAction() == MotionEvent.ACTION_CANCEL) || (event.getAction() == MotionEvent.ACTION_UP)) { mIsInLongpress = false; } return super.onTouchEvent(event); } public void setZoomSpeed(long speed) { mZoomSpeed = speed; } public boolean onLongClick(View v) { mIsInLongpress = true; mHandler.post(mRunnable); return true; } @Override public boolean onKeyUp(int keyCode, KeyEvent event) { mIsInLongpress = false; return super.onKeyUp(keyCode, event); } @Override public void setEnabled(boolean enabled) { if (!enabled) { /* If we're being disabled reset the state back to unpressed * as disabled views don't get events and therefore we won't * get the up event to reset the state. */ setPressed(false); } super.setEnabled(enabled); } @Override public boolean dispatchUnhandledMove(View focused, int direction) { clearFocus(); return super.dispatchUnhandledMove(focused, direction); } } Other Android examples (source code examples)Here is a short list of links related to this Android ZoomButton.java source code file: |
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