1 files changed, 188 insertions, 0 deletions
diff --git a/src/com/android/camera/PanoProgressBar.java b/src/com/android/camera/PanoProgressBar.java
new file mode 100644
index 000000000..8dfb3660b
--- /dev/null
+++ b/src/com/android/camera/PanoProgressBar.java
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2011 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;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+
+class PanoProgressBar extends ImageView {
+    @SuppressWarnings("unused")
+    private static final String TAG = "PanoProgressBar";
+    public static final int DIRECTION_NONE = 0;
+    public static final int DIRECTION_LEFT = 1;
+    public static final int DIRECTION_RIGHT = 2;
+    private float mProgress = 0;
+    private float mMaxProgress = 0;
+    private float mLeftMostProgress = 0;
+    private float mRightMostProgress = 0;
+    private float mProgressOffset = 0;
+    private float mIndicatorWidth = 0;
+    private int mDirection = 0;
+    private final Paint mBackgroundPaint = new Paint();
+    private final Paint mDoneAreaPaint = new Paint();
+    private final Paint mIndicatorPaint = new Paint();
+    private float mWidth;
+    private float mHeight;
+    private RectF mDrawBounds;
+    private OnDirectionChangeListener mListener = null;
+
+    public interface OnDirectionChangeListener {
+        public void onDirectionChange(int direction);
+    }
+
+    public PanoProgressBar(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mDoneAreaPaint.setStyle(Paint.Style.FILL);
+        mDoneAreaPaint.setAlpha(0xff);
+
+        mBackgroundPaint.setStyle(Paint.Style.FILL);
+        mBackgroundPaint.setAlpha(0xff);
+
+        mIndicatorPaint.setStyle(Paint.Style.FILL);
+        mIndicatorPaint.setAlpha(0xff);
+
+        mDrawBounds = new RectF();
+    }
+
+    public void setOnDirectionChangeListener(OnDirectionChangeListener l) {
+        mListener = l;
+    }
+
+    private void setDirection(int direction) {
+        if (mDirection != direction) {
+            mDirection = direction;
+            if (mListener != null) {
+                mListener.onDirectionChange(mDirection);
+            }
+            invalidate();
+        }
+    }
+
+    public int getDirection() {
+        return mDirection;
+    }
+
+    @Override
+    public void setBackgroundColor(int color) {
+        mBackgroundPaint.setColor(color);
+        invalidate();
+    }
+
+    public void setDoneColor(int color) {
+        mDoneAreaPaint.setColor(color);
+        invalidate();
+    }
+
+    public void setIndicatorColor(int color) {
+        mIndicatorPaint.setColor(color);
+        invalidate();
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        mWidth = w;
+        mHeight = h;
+        mDrawBounds.set(0, 0, mWidth, mHeight);
+    }
+
+    public void setMaxProgress(int progress) {
+        mMaxProgress = progress;
+    }
+
+    public void setIndicatorWidth(float w) {
+        mIndicatorWidth = w;
+        invalidate();
+    }
+
+    public void setRightIncreasing(boolean rightIncreasing) {
+        if (rightIncreasing) {
+            mLeftMostProgress = 0;
+            mRightMostProgress = 0;
+            mProgressOffset = 0;
+            setDirection(DIRECTION_RIGHT);
+        } else {
+            mLeftMostProgress = mWidth;
+            mRightMostProgress = mWidth;
+            mProgressOffset = mWidth;
+            setDirection(DIRECTION_LEFT);
+        }
+        invalidate();
+    }
+
+    public void setProgress(int progress) {
+        // The panning direction will be decided after user pan more than 10 degrees in one
+        // direction.
+        if (mDirection == DIRECTION_NONE) {
+            if (progress > 10) {
+                setRightIncreasing(true);
+            } else if (progress < -10) {
+                setRightIncreasing(false);
+            }
+        }
+        // mDirection might be modified by setRightIncreasing() above. Need to check again.
+        if (mDirection != DIRECTION_NONE) {
+            mProgress = progress * mWidth / mMaxProgress + mProgressOffset;
+            // value bounds.
+            mProgress = Math.min(mWidth, Math.max(0, mProgress));
+            if (mDirection == DIRECTION_RIGHT) {
+                // The right most progress is adjusted.
+                mRightMostProgress = Math.max(mRightMostProgress, mProgress);
+            }
+            if (mDirection == DIRECTION_LEFT) {
+                // The left most progress is adjusted.
+                mLeftMostProgress = Math.min(mLeftMostProgress, mProgress);
+            }
+            invalidate();
+        }
+    }
+
+    public void reset() {
+        mProgress = 0;
+        mProgressOffset = 0;
+        setDirection(DIRECTION_NONE);
+        invalidate();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        // the background
+        canvas.drawRect(mDrawBounds, mBackgroundPaint);
+        if (mDirection != DIRECTION_NONE) {
+            // the progress area
+            canvas.drawRect(mLeftMostProgress, mDrawBounds.top, mRightMostProgress,
+                    mDrawBounds.bottom, mDoneAreaPaint);
+            // the indication bar
+            float l;
+            float r;
+            if (mDirection == DIRECTION_RIGHT) {
+                l = Math.max(mProgress - mIndicatorWidth, 0f);
+                r = mProgress;
+            } else {
+                l = mProgress;
+                r = Math.min(mProgress + mIndicatorWidth, mWidth);
+            }
+            canvas.drawRect(l, mDrawBounds.top, r, mDrawBounds.bottom, mIndicatorPaint);
+        }
+
+        // draw the mask image on the top for shaping.
+        super.onDraw(canvas);
+    }
+}