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Diffstat (limited to 'src/com/android/camera/ui/RenderOverlay.java')
-rw-r--r-- | src/com/android/camera/ui/RenderOverlay.java | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/com/android/camera/ui/RenderOverlay.java b/src/com/android/camera/ui/RenderOverlay.java new file mode 100644 index 000000000..d82ce18b6 --- /dev/null +++ b/src/com/android/camera/ui/RenderOverlay.java @@ -0,0 +1,176 @@ +/* + * Copyright (C) 2012 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.content.Context; +import android.graphics.Canvas; +import android.util.AttributeSet; +import android.view.MotionEvent; +import android.view.View; +import android.widget.FrameLayout; + +import com.android.camera.PreviewGestures; + +import java.util.ArrayList; +import java.util.List; + +public class RenderOverlay extends FrameLayout { + + private static final String TAG = "CAM_Overlay"; + + interface Renderer { + + public boolean handlesTouch(); + public boolean onTouchEvent(MotionEvent evt); + public void setOverlay(RenderOverlay overlay); + public void layout(int left, int top, int right, int bottom); + public void draw(Canvas canvas); + + } + + private RenderView mRenderView; + private List<Renderer> mClients; + private PreviewGestures mGestures; + // reverse list of touch clients + private List<Renderer> mTouchClients; + private int[] mPosition = new int[2]; + + public RenderOverlay(Context context, AttributeSet attrs) { + super(context, attrs); + mRenderView = new RenderView(context); + addView(mRenderView, new LayoutParams(LayoutParams.MATCH_PARENT, + LayoutParams.MATCH_PARENT)); + mClients = new ArrayList<Renderer>(10); + mTouchClients = new ArrayList<Renderer>(10); + setWillNotDraw(false); + } + + public void setGestures(PreviewGestures gestures) { + mGestures = gestures; + } + + public void addRenderer(Renderer renderer) { + mClients.add(renderer); + renderer.setOverlay(this); + if (renderer.handlesTouch()) { + mTouchClients.add(0, renderer); + } + renderer.layout(getLeft(), getTop(), getRight(), getBottom()); + } + + public void addRenderer(int pos, Renderer renderer) { + mClients.add(pos, renderer); + renderer.setOverlay(this); + renderer.layout(getLeft(), getTop(), getRight(), getBottom()); + } + + public void remove(Renderer renderer) { + mClients.remove(renderer); + renderer.setOverlay(null); + } + + public int getClientSize() { + return mClients.size(); + } + + @Override + public boolean dispatchTouchEvent(MotionEvent m) { + if (mGestures != null) { + if (!mGestures.isEnabled()) return false; + mGestures.dispatchTouch(m); + } + return true; + } + + public boolean directDispatchTouch(MotionEvent m, Renderer target) { + mRenderView.setTouchTarget(target); + boolean res = mRenderView.dispatchTouchEvent(m); + mRenderView.setTouchTarget(null); + return res; + } + + private void adjustPosition() { + getLocationInWindow(mPosition); + } + + public int getWindowPositionX() { + return mPosition[0]; + } + + public int getWindowPositionY() { + return mPosition[1]; + } + + public void update() { + mRenderView.invalidate(); + } + + private class RenderView extends View { + + private Renderer mTouchTarget; + + public RenderView(Context context) { + super(context); + setWillNotDraw(false); + } + + public void setTouchTarget(Renderer target) { + mTouchTarget = target; + } + + @Override + public boolean dispatchTouchEvent(MotionEvent evt) { + + if (mTouchTarget != null) { + return mTouchTarget.onTouchEvent(evt); + } + if (mTouchClients != null) { + boolean res = false; + for (Renderer client : mTouchClients) { + res |= client.onTouchEvent(evt); + } + return res; + } + return false; + } + + @Override + public void onLayout(boolean changed, int left, int top, int right, int bottom) { + adjustPosition(); + super.onLayout(changed, left, top, right, bottom); + if (mClients == null) return; + for (Renderer renderer : mClients) { + renderer.layout(left, top, right, bottom); + } + } + + @Override + public void draw(Canvas canvas) { + super.draw(canvas); + if (mClients == null) return; + boolean redraw = false; + for (Renderer renderer : mClients) { + renderer.draw(canvas); + redraw = redraw || ((OverlayRenderer) renderer).isVisible(); + } + if (redraw) { + invalidate(); + } + } + } + +} |