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/* * Copyright (C) 2008 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. * * Modifications by: Alessandro Crugnola */ package it.sephiroth.demo.slider.widget; import it.sephiroth.demo.slider.R; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Rect; import android.os.Handler; import android.os.Message; import android.os.SystemClock; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.SoundEffectConstants; import android.view.VelocityTracker; import android.view.View; import android.view.ViewGroup; import android.view.accessibility.AccessibilityEvent; public class MultiDirectionSlidingDrawer extends ViewGroup { public static final int ORIENTATION_RTL = 0; public static final int ORIENTATION_BTT = 1; public static final int ORIENTATION_LTR = 2; public static final int ORIENTATION_TTB = 3; private static final int TAP_THRESHOLD = 6; private static final float MAXIMUM_TAP_VELOCITY = 100.0f; private static final float MAXIMUM_MINOR_VELOCITY = 150.0f; private static final float MAXIMUM_MAJOR_VELOCITY = 200.0f; private static final float MAXIMUM_ACCELERATION = 2000.0f; private static final int VELOCITY_UNITS = 1000; private static final int MSG_ANIMATE = 1000; private static final int ANIMATION_FRAME_DURATION = 1000 / 60; private static final int EXPANDED_FULL_OPEN = -10001; private static final int COLLAPSED_FULL_CLOSED = -10002; private final int mHandleId; private final int mContentId; private View mHandle; private View mContent; private final Rect mFrame = new Rect(); private final Rect mInvalidate = new Rect(); private boolean mTracking; private boolean mLocked; private VelocityTracker mVelocityTracker; private boolean mInvert; private boolean mVertical; private boolean mExpanded; private int mBottomOffset; private int mTopOffset; private int mHandleHeight; private int mHandleWidth; private OnDrawerOpenListener mOnDrawerOpenListener; private OnDrawerCloseListener mOnDrawerCloseListener; private OnDrawerScrollListener mOnDrawerScrollListener; private final Handler mHandler = new SlidingHandler(); private float mAnimatedAcceleration; private float mAnimatedVelocity; private float mAnimationPosition; private long mAnimationLastTime; private long mCurrentAnimationTime; private int mTouchDelta; private boolean mAnimating; private boolean mAllowSingleTap; private boolean mAnimateOnClick; private final int mTapThreshold; private final int mMaximumTapVelocity; private int mMaximumMinorVelocity; private int mMaximumMajorVelocity; private int mMaximumAcceleration; private final int mVelocityUnits; /** * Callback invoked when the drawer is opened. */ public static interface OnDrawerOpenListener { /** * Invoked when the drawer becomes fully open. */ public void onDrawerOpened(); } /** * Callback invoked when the drawer is closed. */ public static interface OnDrawerCloseListener { /** * Invoked when the drawer becomes fully closed. */ public void onDrawerClosed(); } /** * Callback invoked when the drawer is scrolled. */ public static interface OnDrawerScrollListener { /** * Invoked when the user starts dragging/flinging the drawer's handle. */ public void onScrollStarted(); /** * Invoked when the user stops dragging/flinging the drawer's handle. */ public void onScrollEnded(); } /** * Creates a new SlidingDrawer from a specified set of attributes defined in * XML. * * @param context * The application's environment. * @param attrs * The attributes defined in XML. */ public MultiDirectionSlidingDrawer( Context context, AttributeSet attrs ) { this( context, attrs, 0 ); } /** * Creates a new SlidingDrawer from a specified set of attributes defined in * XML. * * @param context * The application's environment. * @param attrs * The attributes defined in XML. * @param defStyle * The style to apply to this widget. */ public MultiDirectionSlidingDrawer( Context context, AttributeSet attrs, int defStyle ) { super( context, attrs, defStyle ); TypedArray a = context.obtainStyledAttributes( attrs, R.styleable.MultiDirectionSlidingDrawer, defStyle, 0 ); int orientation = a.getInt( R.styleable.MultiDirectionSlidingDrawer_direction, ORIENTATION_BTT ); mVertical = ( orientation == ORIENTATION_BTT || orientation == ORIENTATION_TTB ); mBottomOffset = (int)a.getDimension( R.styleable.MultiDirectionSlidingDrawer_bottomOffset, 0.0f ); mTopOffset = (int)a.getDimension( R.styleable.MultiDirectionSlidingDrawer_topOffset, 0.0f ); mAllowSingleTap = a.getBoolean( R.styleable.MultiDirectionSlidingDrawer_allowSingleTap, true ); mAnimateOnClick = a.getBoolean( R.styleable.MultiDirectionSlidingDrawer_animateOnClick, true ); mInvert = ( orientation == ORIENTATION_TTB || orientation == ORIENTATION_LTR ); int handleId = a.getResourceId( R.styleable.MultiDirectionSlidingDrawer_handle, 0 ); if ( handleId == 0 ) { throw new IllegalArgumentException( "The handle attribute is required and must refer " + "to a valid child." ); } int contentId = a.getResourceId( R.styleable.MultiDirectionSlidingDrawer_content, 0 ); if ( contentId == 0 ) { throw new IllegalArgumentException( "The content attribute is required and must refer " + "to a valid child." ); } if ( handleId == contentId ) { throw new IllegalArgumentException( "The content and handle attributes must refer " + "to different children." ); } mHandleId = handleId; mContentId = contentId; final float density = getResources().getDisplayMetrics().density; mTapThreshold = (int)( TAP_THRESHOLD * density + 0.5f ); mMaximumTapVelocity = (int)( MAXIMUM_TAP_VELOCITY * density + 0.5f ); mMaximumMinorVelocity = (int)( MAXIMUM_MINOR_VELOCITY * density + 0.5f ); mMaximumMajorVelocity = (int)( MAXIMUM_MAJOR_VELOCITY * density + 0.5f ); mMaximumAcceleration = (int)( MAXIMUM_ACCELERATION * density + 0.5f ); mVelocityUnits = (int)( VELOCITY_UNITS * density + 0.5f ); if( mInvert ) { mMaximumAcceleration = -mMaximumAcceleration; mMaximumMajorVelocity = -mMaximumMajorVelocity; mMaximumMinorVelocity = -mMaximumMinorVelocity; } a.recycle(); setAlwaysDrawnWithCacheEnabled( false ); } @Override protected void onFinishInflate() { mHandle = findViewById( mHandleId ); if ( mHandle == null ) { throw new IllegalArgumentException( "The handle attribute is must refer to an" + " existing child." ); } mHandle.setOnClickListener( new DrawerToggler() ); mContent = findViewById( mContentId ); if ( mContent == null ) { throw new IllegalArgumentException( "The content attribute is must refer to an" + " existing child." ); } mContent.setVisibility( View.GONE ); } @Override protected void onMeasure( int widthMeasureSpec, int heightMeasureSpec ) { int widthSpecMode = MeasureSpec.getMode( widthMeasureSpec ); int widthSpecSize = MeasureSpec.getSize( widthMeasureSpec