| /* |
| * Copyright (C) 2013 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.camera.ui; |
| |
| import android.graphics.RectF; |
| import android.view.GestureDetector; |
| import android.view.TextureView; |
| import android.view.View; |
| |
| /** |
| * This interface defines a listener that watches preview status, including SurfaceTexture |
| * change and preview gestures. |
| */ |
| public interface PreviewStatusListener extends TextureView.SurfaceTextureListener { |
| /** |
| * The preview status listener needs to provide an |
| * {@link android.view.GestureDetector.OnGestureListener} in order to listen |
| * to the touch events that happen on preview. |
| * |
| * @return a listener that listens to touch events |
| */ |
| public GestureDetector.OnGestureListener getGestureListener(); |
| |
| /** |
| * An {@link android.view.View.OnTouchListener} can be provided in addition to |
| * or instead of a {@link android.view.GestureDetector.OnGestureListener} |
| * for listening to touch events on the preview. The listener is called whenever |
| * there is a touch event on the {@link com.android.camera.ui.PreviewOverlay}. |
| */ |
| public View.OnTouchListener getTouchListener(); |
| |
| /** |
| * Gets called when preview TextureView gets a layout change call. |
| */ |
| public void onPreviewLayoutChanged(View v, int left, int top, int right, |
| int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom); |
| |
| /** |
| * This listener gets notified when the actual preview frame changes due |
| * to a transform matrix being applied to the TextureView |
| */ |
| public interface PreviewAreaChangedListener { |
| public void onPreviewAreaChanged(RectF previewArea); |
| } |
| |
| /** |
| * The preview status listener needs to know for the specific module whether |
| * preview TextureView should automatically adjust its transform matrix based |
| * on the current aspect ratio, width and height of the TextureView. |
| * |
| * @return whether transform matrix should be automatically adjusted |
| */ |
| public boolean shouldAutoAdjustTransformMatrixOnLayout(); |
| |
| /** |
| * The preview status listener needs to know for the specific module whether |
| * bottom bar should be automatically adjusted when preview has changed size |
| * or orientation. |
| * |
| * @return whether bottom bar should be automatically adjusted |
| */ |
| public boolean shouldAutoAdjustBottomBar(); |
| |
| /** |
| * Gets called when the preview is flipped (i.e. 180-degree rotated). |
| */ |
| public void onPreviewFlipped(); |
| |
| /** |
| * This listener gets notified when the preview aspect ratio is changed. |
| */ |
| public interface PreviewAspectRatioChangedListener { |
| public void onPreviewAspectRatioChanged(float aspectRatio); |
| } |
| } |