SlidingMenu_RelativeLayout_CustomViewBehind

public class CustomViewBehind extends ViewGroup {private static final String TAG = "CustomViewBehind";private static final int MARGIN_THRESHOLD = 48; // dipsprivate int mTouchMode = SlidingMenu.TOUCHMODE_MARGIN;private CustomViewAbove mViewAbove;private View mContent;private View mSecondaryContent;private int mMarginThreshold;private int mWidthOffset;private CanvasTransformer mTransformer;private boolean mChildrenEnabled;public CustomViewBehind(Context context) {this(context, null);}public CustomViewBehind(Context context, AttributeSet attrs) {super(context, attrs);mMarginThreshold = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, MARGIN_THRESHOLD, getResources().getDisplayMetrics());}public void setCustomViewAbove(CustomViewAbove customViewAbove) {mViewAbove = customViewAbove;}public void setCanvasTransformer(CanvasTransformer t) {mTransformer = t;}public void setWidthOffset(int i) {mWidthOffset = i;requestLayout();}public void setMarginThreshold(int marginThreshold) {mMarginThreshold = marginThreshold;}public int getMarginThreshold() {return mMarginThreshold;}public int getBehindWidth() {return mContent.getWidth();}public void setContent(View v) {if (mContent != null)removeView(mContent);mContent = v;addView(mContent);}public View getContent() {return mContent;}/** * Sets the secondary (right) menu for use when setMode is called with SlidingMenu.LEFT_RIGHT. * @param v the right menu */public void setSecondaryContent(View v) {if (mSecondaryContent != null)removeView(mSecondaryContent);mSecondaryContent = v;addView(mSecondaryContent);}public View getSecondaryContent() {return mSecondaryContent;}public void setChildrenEnabled(boolean enabled) {mChildrenEnabled = enabled;}@Overridepublic void scrollTo(int x, int y) {super.scrollTo(x, y);if (mTransformer != null)invalidate();}@Overridepublic boolean onInterceptTouchEvent(MotionEvent e) {return !mChildrenEnabled;}@Overridepublic boolean onTouchEvent(MotionEvent e) {return !mChildrenEnabled;}@Overrideprotected void dispatchDraw(Canvas canvas) {if (mTransformer != null) {canvas.save();mTransformer.transformCanvas(canvas, mViewAbove.getPercentOpen());super.dispatchDraw(canvas);canvas.restore();} elsesuper.dispatchDraw(canvas);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {final int width = r - l;final int height = b - t;mContent.layout(0, 0, width-mWidthOffset, height);if (mSecondaryContent != null)mSecondaryContent.layout(0, 0, width-mWidthOffset, height);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int width = getDefaultSize(0, widthMeasureSpec);int height = getDefaultSize(0, heightMeasureSpec);setMeasuredDimension(width, height);final int contentWidth = getChildMeasureSpec(widthMeasureSpec, 0, width-mWidthOffset);final int contentHeight = getChildMeasureSpec(heightMeasureSpec, 0, height);mContent.measure(contentWidth, contentHeight);if (mSecondaryContent != null)mSecondaryContent.measure(contentWidth, contentHeight);}private int mMode;private boolean mFadeEnabled;private final Paint mFadePaint = new Paint();private float mScrollScale;private Drawable mShadowDrawable;private Drawable mSecondaryShadowDrawable;private int mShadowWidth;private float mFadeDegree;public void setMode(int mode) {if (mode == SlidingMenu.LEFT || mode == SlidingMenu.RIGHT) {if (mContent != null)mContent.setVisibility(View.VISIBLE);if (mSecondaryContent != null)mSecondaryContent.setVisibility(View.INVISIBLE);}mMode = mode;}public int getMode() {return mMode;}public void setScrollScale(float scrollScale) {mScrollScale = scrollScale;}public float getScrollScale() {return mScrollScale;}public void setShadowDrawable(Drawable shadow) {mShadowDrawable = shadow;invalidate();}public void setSecondaryShadowDrawable(Drawable shadow) {mSecondaryShadowDrawable = shadow;invalidate();}public void setShadowWidth(int width) {mShadowWidth = width;invalidate();}public void setFadeEnabled(boolean b) {mFadeEnabled = b;}public void setFadeDegree(float degree) {if (degree > 1.0f || degree < 0.0f)throw new IllegalStateException("The BehindFadeDegree must be between 0.0f and 1.0f");mFadeDegree = degree;}public int getMenuPage(int page) {page = (page > 1) ? 2 : ((page < 1) ? 0 : page);if (mMode == SlidingMenu.LEFT && page > 1) {return 0;} else if (mMode == SlidingMenu.RIGHT && page < 1) {return 2;} else {return page;}}public void scrollBehindTo(View content, int x, int y) {int vis = View.VISIBLE;if (mMode == SlidingMenu.LEFT) {if (x >= content.getLeft()) vis = View.INVISIBLE;scrollTo((int)((x + getBehindWidth())*mScrollScale), y);} else if (mMode == SlidingMenu.RIGHT) {if (x <= content.getLeft()) vis = View.INVISIBLE;scrollTo((int)(getBehindWidth() - getWidth() + (x-getBehindWidth())*mScrollScale), y);} else if (mMode == SlidingMenu.LEFT_RIGHT) {mContent.setVisibility(x >= content.getLeft() ? View.INVISIBLE : View.VISIBLE);mSecondaryContent.setVisibility(x <= content.getLeft() ? View.INVISIBLE : View.VISIBLE);vis = x == 0 ? View.INVISIBLE : View.VISIBLE;if (x <= content.getLeft()) {scrollTo((int)((x + getBehindWidth())*mScrollScale), y);} else {scrollTo((int)(getBehindWidth() - getWidth() + (x-getBehindWidth())*mScrollScale), y);}}if (vis == View.INVISIBLE)Log.v(TAG, "behind INVISIBLE");setVisibility(vis);}public int getMenuLeft(View content, int page) {if (mMode == SlidingMenu.LEFT) {switch (page) {case 0:return content.getLeft() - getBehindWidth();case 2:return content.getLeft();}} else if (mMode == SlidingMenu.RIGHT) {switch (page) {case 0:return content.getLeft();case 2:return content.getLeft() + getBehindWidth();}} else if (mMode == SlidingMenu.LEFT_RIGHT) {switch (page) {case 0:return content.getLeft() - getBehindWidth();case 2:return content.getLeft() + getBehindWidth();}}return content.getLeft();}public int getAbsLeftBound(View content) {if (mMode == SlidingMenu.LEFT || mMode == SlidingMenu.LEFT_RIGHT) {return content.getLeft() - getBehindWidth();} else if (mMode == SlidingMenu.RIGHT) {return content.getLeft();}return 0;}public int getAbsRightBound(View content) {if (mMode == SlidingMenu.LEFT) {return content.getLeft();} else if (mMode == SlidingMenu.RIGHT || mMode == SlidingMenu.LEFT_RIGHT) {return content.getLeft() + getBehindWidth();}return 0;}public boolean marginTouchAllowed(View content, int x) {int left = content.getLeft();int right = content.getRight();if (mMode == SlidingMenu.LEFT) {return (x >= left && x <= mMarginThreshold + left);} else if (mMode == SlidingMenu.RIGHT) {return (x <= right && x >= right - mMarginThreshold);} else if (mMode == SlidingMenu.LEFT_RIGHT) {return (x >= left && x <= mMarginThreshold + left) || (x <= right && x >= right - mMarginThreshold);}return false;}public void setTouchMode(int i) {mTouchMode = i;}public boolean menuOpenTouchAllowed(View content, int currPage, float x) {switch (mTouchMode) {case SlidingMenu.TOUCHMODE_FULLSCREEN:return true;case SlidingMenu.TOUCHMODE_MARGIN:return menuTouchInQuickReturn(content, currPage, x);}return false;}public boolean menuTouchInQuickReturn(View content, int currPage, float x) {if (mMode == SlidingMenu.LEFT || (mMode == SlidingMenu.LEFT_RIGHT && currPage == 0)) {return x >= content.getLeft();} else if (mMode == SlidingMenu.RIGHT || (mMode == SlidingMenu.LEFT_RIGHT && currPage == 2)) {return x <= content.getRight();}return false;}public boolean menuClosedSlideAllowed(float dx) {if (mMode == SlidingMenu.LEFT) {return dx > 0;} else if (mMode == SlidingMenu.RIGHT) {return dx < 0;} else if (mMode == SlidingMenu.LEFT_RIGHT) {return true;}return false;}public boolean menuOpenSlideAllowed(float dx) {if (mMode == SlidingMenu.LEFT) {return dx < 0;} else if (mMode == SlidingMenu.RIGHT) {return dx > 0;} else if (mMode == SlidingMenu.LEFT_RIGHT) {return true;}return false;}public void drawShadow(View content, Canvas canvas) {if (mShadowDrawable == null || mShadowWidth <= 0) return;int left = 0;if (mMode == SlidingMenu.LEFT) {left = content.getLeft() - mShadowWidth;} else if (mMode == SlidingMenu.RIGHT) {left = content.getRight();} else if (mMode == SlidingMenu.LEFT_RIGHT) {if (mSecondaryShadowDrawable != null) {left = content.getRight();mSecondaryShadowDrawable.setBounds(left, 0, left + mShadowWidth, getHeight());mSecondaryShadowDrawable.draw(canvas);}left = content.getLeft() - mShadowWidth;}mShadowDrawable.setBounds(left, 0, left + mShadowWidth, getHeight());mShadowDrawable.draw(canvas);}public void drawFade(View content, Canvas canvas, float openPercent) {if (!mFadeEnabled) return;final int alpha = (int) (mFadeDegree * 255 * Math.abs(1-openPercent));mFadePaint.setColor(Color.argb(alpha, 0, 0, 0));int left = 0;int right = 0;if (mMode == SlidingMenu.LEFT) {left = content.getLeft() - getBehindWidth();right = content.getLeft();} else if (mMode == SlidingMenu.RIGHT) {left = content.getRight();right = content.getRight() + getBehindWidth();} else if (mMode == SlidingMenu.LEFT_RIGHT) {left = content.getLeft() - getBehindWidth();right = content.getLeft();canvas.drawRect(left, 0, right, getHeight(), mFadePaint);left = content.getRight();right = content.getRight() + getBehindWidth();}canvas.drawRect(left, 0, right, getHeight(), mFadePaint);}private boolean mSelectorEnabled = true;private Bitmap mSelectorDrawable;private View mSelectedView;public void drawSelector(View content, Canvas canvas, float openPercent) {if (!mSelectorEnabled) return;if (mSelectorDrawable != null && mSelectedView != null) {String tag = (String) mSelectedView.getTag(R.id.selected_view);if (tag.equals(TAG+"SelectedView")) {canvas.save();int left, right, offset;offset = (int) (mSelectorDrawable.getWidth() * openPercent);if (mMode == SlidingMenu.LEFT) {right = content.getLeft();left = right - offset;canvas.clipRect(left, 0, right, getHeight());canvas.drawBitmap(mSelectorDrawable, left, getSelectorTop(), null);} else if (mMode == SlidingMenu.RIGHT) {left = content.getRight();right = left + offset;canvas.clipRect(left, 0, right, getHeight());canvas.drawBitmap(mSelectorDrawable, right - mSelectorDrawable.getWidth(), getSelectorTop(), null);}canvas.restore();}}}public void setSelectorEnabled(boolean b) {mSelectorEnabled = b;}public void setSelectedView(View v) {if (mSelectedView != null) {mSelectedView.setTag(R.id.selected_view, null);mSelectedView = null;}if (v != null && v.getParent() != null) {mSelectedView = v;mSelectedView.setTag(R.id.selected_view, TAG+"SelectedView");invalidate();}}private int getSelectorTop() {int y = mSelectedView.getTop();y += (mSelectedView.getHeight() - mSelectorDrawable.getHeight()) / 2;return y;}public void setSelectorBitmap(Bitmap b) {mSelectorDrawable = b;refreshDrawableState();}}