Fix up layout of auto HDR notice and histogram view.

Change-Id: I61f93c68b52d81c5e19919a5b0b894cf51dd35c4

3 files changed, 163 insertions, 4 deletions

diff --git a/src/com/android/camera/ui/CameraControls.java b/src/com/android/camera/ui/CameraControls.java
index 186626015..a93b41773 100644
--- a/src/com/android/camera/ui/CameraControls.java
+++ b/src/com/android/camera/ui/CameraControls.java
@@ -38,6 +38,7 @@ import android.widget.TextView;
 import java.util.ArrayList;
 
 import org.codeaurora.snapcam.R;
+import com.android.camera.CameraManager;
 import com.android.camera.ui.ModuleSwitcher;
 import com.android.camera.ui.RotateImageView;
 import com.android.camera.ShutterButton;
@@ -65,6 +66,8 @@ public class CameraControls extends RotatableLayout {
     private View mReviewDoneButton;
     private View mReviewCancelButton;
     private View mReviewRetakeButton;
+    private View mAutoHdrNotice;
+    private HistogramView mHistogramView;
     private ArrowTextView mRefocusToast;
 
     private int mSize;
@@ -84,9 +87,11 @@ public class CameraControls extends RotatableLayout {
     private static final int INDICATOR_INDEX = 8;
     private static final int MUTE_INDEX = 9;
     private static final int VIDEO_SHUTTER_INDEX = 10;
+    private static final int HISTOGRAM_INDEX = 11;
+    private static final int AUTO_HDR_INDEX = 12;
     private static final int ANIME_DURATION = 300;
-    private float[][] mLocX = new float[4][11];
-    private float[][] mLocY = new float[4][11];
+    private float[][] mLocX = new float[4][13];
+    private float[][] mLocY = new float[4][13];
     private boolean mLocSet = false;
     private boolean mHideRemainingPhoto = false;
     private LinearLayout mRemainingPhotos;
@@ -297,6 +302,8 @@ public class CameraControls extends RotatableLayout {
         mFilterModeSwitcher = findViewById(R.id.filter_mode_switcher);
         mRemainingPhotos = (LinearLayout) findViewById(R.id.remaining_photos);
         mRemainingPhotosText = (TextView) findViewById(R.id.remaining_photos_text);
+        mAutoHdrNotice = (TextView) findViewById(R.id.auto_hdr_notice);
+        mHistogramView = (HistogramView) findViewById(R.id.histogram);
     }
 
     @Override
@@ -322,6 +329,13 @@ public class CameraControls extends RotatableLayout {
         mBackgroundView.setVisibility(View.GONE);
         setLocation(r - l, b - t);
 
+        center(mAutoHdrNotice, l, t + mSize, r,
+                t + mSize + mAutoHdrNotice.getMeasuredHeight(),
+                orientation, rotation, new Rect(), AUTO_HDR_INDEX);
+        center(mHistogramView, l, t + mSize,
+                r, t + mSize + mHistogramView.getMeasuredHeight(),
+                orientation, rotation, new Rect(), HISTOGRAM_INDEX);
+
         View retake = findViewById(R.id.btn_retake);
         if (retake != null) {
             mReviewRetakeButton = retake;
@@ -516,6 +530,10 @@ public class CameraControls extends RotatableLayout {
         }
     }
 
+    public void setAutoHdrEnabled(boolean enabled) {
+        mAutoHdrNotice.setVisibility(enabled ? View.VISIBLE : View.GONE);
+    }
+
     public void hideUI() {
         if (!mAnimating)
             enableTouch(false);
@@ -995,19 +1013,30 @@ public class CameraControls extends RotatableLayout {
         }
     }
 
+    public void setHistogramEnabled(boolean enabled, CameraManager.CameraProxy camera) {
+        mHistogramView.setVisibility(enabled ? View.VISIBLE : View.GONE);
+        mHistogramView.setCamera(camera);
+    }
+
+    public void updateHistogramData(int[] data) {
+        mHistogramView.updateData(data);
+    }
+
     public void setOrientation(int orientation, boolean animation) {
         mOrientation = orientation;
         View[] views = {
             mSceneModeSwitcher, mFilterModeSwitcher, mFrontBackSwitcher,
             TsMakeupManager.HAS_TS_MAKEUP ? mTsMakeupSwitcher : mHdrSwitcher,
             mMenu, mShutter, mPreview, mSwitcher, mMute, mReviewRetakeButton,
-            mReviewCancelButton, mReviewDoneButton
+            mReviewCancelButton, mReviewDoneButton, mAutoHdrNotice, mHistogramView
         };
         for (View v : views) {
             if (v != null) {
                 if (v instanceof RotateImageView) {
                     ((RotateImageView) v).setOrientation(orientation,
                                                          animation);
+                } else if (v instanceof HistogramView) {
+                    ((HistogramView) v).setRotation(-orientation);
                 }
             }
         }
diff --git a/src/com/android/camera/ui/HistogramView.java b/src/com/android/camera/ui/HistogramView.java
new file mode 100644
index 000000000..2ae2c40a8
--- /dev/null
+++ b/src/com/android/camera/ui/HistogramView.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ * Copyright (C) 2013-2015 The CyanogenMod 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.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.util.AttributeSet;
+import android.view.View;
+
+import com.android.camera.CameraManager;
+
+public class HistogramView extends View {
+    private static final int STATS_SIZE = 256;
+
+    private int[] mData = new int[STATS_SIZE + 1];
+    private boolean mDataValid;
+
+    private Bitmap  mBitmap;
+    private Paint   mPaint = new Paint();
+    private Paint   mPaintRect = new Paint();
+    private Canvas  mCanvas = new Canvas();
+    private float   mWidth;
+    private float   mHeight;
+    private CameraManager.CameraProxy mGraphCameraDevice;
+
+    public HistogramView(Context context, AttributeSet attrs) {
+        super(context,attrs);
+
+        mPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
+        mPaintRect.setColor(0xFFFFFFFF);
+        mPaintRect.setStyle(Paint.Style.FILL);
+    }
+
+    public void setCamera(CameraManager.CameraProxy camera) {
+        mGraphCameraDevice = camera;
+        if (camera == null) {
+            mDataValid = false;
+        }
+    }
+
+    public void updateData(int[] data) {
+        if (data.length == mData.length) {
+            System.arraycopy(data, 0, mData, 0, data.length);
+            drawGraph();
+            mDataValid = true;
+            invalidate();
+        }
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565);
+        mCanvas.setBitmap(mBitmap);
+        mWidth = w;
+        mHeight = h;
+        if (mDataValid) {
+            drawGraph();
+        }
+        super.onSizeChanged(w, h, oldw, oldh);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (mDataValid && mBitmap != null) {
+            canvas.drawBitmap(mBitmap, 0, 0, null);
+            if (mGraphCameraDevice != null) {
+                mGraphCameraDevice.sendHistogramData();
+            }
+        }
+    }
+
+    private void drawGraph() {
+        final float border = 5;
+        float graphheight = mHeight - (2 * border);
+        float graphwidth = mWidth - (2 * border);
+        float bargap = 0.0f;
+        float barwidth = graphwidth/STATS_SIZE;
+
+        mCanvas.drawColor(0xFFAAAAAA);
+        mPaint.setColor(Color.BLACK);
+
+        for (int k = 0; k <= (graphheight /32) ; k++) {
+            float y = (float)(32 * k)+ border;
+            mCanvas.drawLine(border, y, graphwidth + border , y, mPaint);
+        }
+        for (int j = 0; j <= (graphwidth /32); j++) {
+            float x = (float)(32 * j)+ border;
+            mCanvas.drawLine(x, border, x, graphheight + border, mPaint);
+        }
+
+        //Assumption: The first element contains the maximum value.
+        int maxValue = Integer.MIN_VALUE;
+        if (mData[0] == 0) {
+            for (int i = 1; i <= STATS_SIZE ; i++) {
+                maxValue = Math.max(maxValue, mData[i]);
+            }
+        } else {
+            maxValue = mData[0];
+        }
+
+        for (int i = 1; i <= STATS_SIZE; i++)  {
+            float scaled = Math.min(STATS_SIZE,
+                    (float) mData[i] * (float) STATS_SIZE / (float) maxValue);
+            float left = (bargap * (i+1)) + (barwidth * i) + border;
+            float top = graphheight + border;
+            float right = left + barwidth;
+            float bottom = top - scaled;
+            mCanvas.drawRect(left, top, right, bottom, mPaintRect);
+        }
+    }
+}
+
diff --git a/src/com/android/camera/ui/RotatableLayout.java b/src/com/android/camera/ui/RotatableLayout.java
index 6867e6a8b..702590f9f 100644
--- a/src/com/android/camera/ui/RotatableLayout.java
+++ b/src/com/android/camera/ui/RotatableLayout.java
@@ -280,4 +280,4 @@ public class RotatableLayout extends FrameLayout {
         rotateClockwise(view);
         rotateClockwise(view);
     }
-}
\ No newline at end of file
+}