diff options
Diffstat (limited to 'src/com/android/camera/PanoProgressBar.java')
-rw-r--r-- | src/com/android/camera/PanoProgressBar.java | 188 |
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); + } +} |