Initial Contribution

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);
+    }
+}