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author | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
commit | 54b6cfa9a9e5b861a9930af873580d6dc20f773c (patch) | |
tree | 35051494d2af230dce54d6b31c6af8fc24091316 /core/java/android/widget/ZoomButton.java | |
download | frameworks_base-54b6cfa9a9e5b861a9930af873580d6dc20f773c.zip frameworks_base-54b6cfa9a9e5b861a9930af873580d6dc20f773c.tar.gz frameworks_base-54b6cfa9a9e5b861a9930af873580d6dc20f773c.tar.bz2 |
Initial Contribution
Diffstat (limited to 'core/java/android/widget/ZoomButton.java')
-rw-r--r-- | core/java/android/widget/ZoomButton.java | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/core/java/android/widget/ZoomButton.java b/core/java/android/widget/ZoomButton.java new file mode 100644 index 0000000..5df8c8a --- /dev/null +++ b/core/java/android/widget/ZoomButton.java @@ -0,0 +1,110 @@ +/* + * 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.GestureDetector; +import android.view.KeyEvent; +import android.view.MotionEvent; +import android.view.View; +import android.view.GestureDetector.SimpleOnGestureListener; +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 final GestureDetector mGestureDetector; + + 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(); + mGestureDetector = new GestureDetector(new SimpleOnGestureListener() { + @Override + public void onLongPress(MotionEvent e) { + onLongClick(ZoomButton.this); + } + }); + setOnLongClickListener(this); + } + + @Override + public boolean onTouchEvent(MotionEvent event) { + mGestureDetector.onTouchEvent(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); + } +} |