Camera: Change volume hard key button to zoom functionnext

Able to capture image through volume hard key
button in camera application, change the function
to zoom function.

Change-Id: Iab9fc2492b2e2ff89cd58c21bac2f147f47b77e2

4 files changed, 80 insertions, 6 deletions

diff --git a/src/com/android/camera/PhotoModule.java b/src/com/android/camera/PhotoModule.java
index cbfc385b2..0ab6bd596 100644
--- a/src/com/android/camera/PhotoModule.java
+++ b/src/com/android/camera/PhotoModule.java
@@ -1633,7 +1633,17 @@ public class PhotoModule
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         switch (keyCode) {
         case KeyEvent.KEYCODE_VOLUME_UP:
+            if (mActivity.isInCameraApp() && mFirstTimeInitialized
+                && (mUI.mMenuInitialized)) {
+                mUI.onScaleStepResize(true);
+            }
+            return true;
         case KeyEvent.KEYCODE_VOLUME_DOWN:
+            if (mActivity.isInCameraApp() && mFirstTimeInitialized
+                && (mUI.mMenuInitialized)) {
+                mUI.onScaleStepResize(false);
+            }
+            return true;
         case KeyEvent.KEYCODE_FOCUS:
             if (mActivity.isInCameraApp() && mFirstTimeInitialized &&
                   mShutterButton.getVisibility() == View.VISIBLE) {
@@ -1671,12 +1681,7 @@ public class PhotoModule
         switch (keyCode) {
         case KeyEvent.KEYCODE_VOLUME_UP:
         case KeyEvent.KEYCODE_VOLUME_DOWN:
-            if (mActivity.isInCameraApp() && mFirstTimeInitialized &&
-                  mShutterButton.getVisibility() == View.VISIBLE) {
-                onShutterButtonClick();
-                return true;
-            }
-            return false;
+            return true;
         case KeyEvent.KEYCODE_FOCUS:
             if (mFirstTimeInitialized) {
                 onShutterButtonFocus(false);
diff --git a/src/com/android/camera/PhotoUI.java b/src/com/android/camera/PhotoUI.java
index dddf56292..42907274b 100644
--- a/src/com/android/camera/PhotoUI.java
+++ b/src/com/android/camera/PhotoUI.java
@@ -32,6 +32,7 @@ import android.view.ViewStub;
 import android.widget.FrameLayout;
 import android.widget.FrameLayout.LayoutParams;
 import android.widget.Toast;
+import android.graphics.Canvas;
 
 import com.android.camera.CameraPreference.OnPreferenceChangedListener;
 import com.android.camera.FocusOverlayManager.FocusUI;
@@ -692,6 +693,22 @@ public class PhotoUI implements PieListener,
         mFaceView.setFaces(faces);
     }
 
+
+    public boolean onScaleStepResize(boolean direction)
+    {
+        if(mGestures != null){
+            return mGestures.onScaleStepResize(direction);
+        }
+        return false;
+    }
+
+    public void onScaleChangeDraw(Canvas canvas)
+    {
+        if(mGestures != null){
+            mGestures.onScaleChangeDraw(canvas);
+        }
+    }
+
     @Override
     public void onSwipe(int direction) {
         if (direction == PreviewGestures.DIR_UP) {
diff --git a/src/com/android/camera/PreviewGestures.java b/src/com/android/camera/PreviewGestures.java
index 0b80ff688..3d27e5166 100644
--- a/src/com/android/camera/PreviewGestures.java
+++ b/src/com/android/camera/PreviewGestures.java
@@ -22,6 +22,7 @@ import android.view.MotionEvent;
 import android.view.ScaleGestureDetector;
 import android.view.View;
 import android.view.ViewConfiguration;
+import android.graphics.Canvas;
 
 import com.android.camera.ui.PieRenderer;
 import com.android.camera.ui.RenderOverlay;
@@ -385,4 +386,19 @@ public class PreviewGestures
             mZoom.onScaleEnd(detector);
         }
     }
+
+    public boolean onScaleStepResize(boolean direction)
+    {
+        if(mZoom != null){
+            return mZoom.onScaleStepResize(direction);
+        }
+        return false;
+    }
+
+    public void onScaleChangeDraw(Canvas canvas)
+    {
+        if(mZoom != null){
+            mZoom.onScaleChangeDraw(canvas);
+        }
+    }
 }
diff --git a/src/com/android/camera/ui/ZoomRenderer.java b/src/com/android/camera/ui/ZoomRenderer.java
index 86b82b459..386f2a387 100644
--- a/src/com/android/camera/ui/ZoomRenderer.java
+++ b/src/com/android/camera/ui/ZoomRenderer.java
@@ -48,6 +48,7 @@ public class ZoomRenderer extends OverlayRenderer
     private int mZoomSig;
     private int mZoomFraction;
     private Rect mTextBounds;
+    private Canvas mCanvas;
 
     public interface OnZoomChangedListener {
         void onZoomStart();
@@ -109,6 +110,7 @@ public class ZoomRenderer extends OverlayRenderer
 
     @Override
     public void onDraw(Canvas canvas) {
+        mCanvas = canvas;
         mPaint.setStrokeWidth(mInnerStroke);
         canvas.drawCircle(mCenterX, mCenterY, mMinCircle, mPaint);
         canvas.drawCircle(mCenterX, mCenterY, mMaxCircle, mPaint);
@@ -123,6 +125,13 @@ public class ZoomRenderer extends OverlayRenderer
                 mTextPaint);
     }
 
+     public void onScaleChangeDraw(Canvas canvas) {
+        if(mCanvas != null){
+            onDraw(mCanvas);
+        }
+    }
+
+
     @Override
     public boolean onScale(ScaleGestureDetector detector) {
         final float sf = detector.getScaleFactor();
@@ -137,6 +146,33 @@ public class ZoomRenderer extends OverlayRenderer
         return true;
     }
 
+    public boolean onScaleStepResize(boolean direction) {
+        int zoom;
+        float circle;
+        float circleStep = (mMaxCircle - mMinCircle)/10;
+        if(direction){
+            circle = (int) (mCircleSize + circleStep);
+        } else {
+            circle = (int) (mCircleSize - circleStep);
+        }
+        circle = Math.max(mMinCircle, circle);
+        circle = Math.min(mMaxCircle, circle);
+        if (mListener != null && (int) circle != mCircleSize
+            && ((mMaxCircle - mMinCircle) != 0)) {
+            mCircleSize = (int) circle;
+            zoom = mMinZoom + (int) ((mCircleSize - mMinCircle)
+                   * (mMaxZoom - mMinZoom) / (mMaxCircle - mMinCircle));
+            if (mListener != null) {
+                mListener.onZoomStart();
+                mListener.onZoomValueChanged(zoom);
+                mListener.onZoomEnd();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+
     @Override
     public boolean onScaleBegin(ScaleGestureDetector detector) {
         setVisible(true);