List of usage examples for android.view Gravity VERTICAL_GRAVITY_MASK
int VERTICAL_GRAVITY_MASK
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From source file:com.ferg.awfulapp.widget.AwfulViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { mInLayout = true;/*w w w. jav a 2 s .com*/ populate(); mInLayout = false; final int count = getChildCount(); int width = r - l; int height = b - t; int paddingLeft = getPaddingLeft(); int paddingTop = getPaddingTop(); int paddingRight = getPaddingRight(); int paddingBottom = getPaddingBottom(); final int scrollX = getScrollX(); int decorCount = 0; for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); ItemInfo ii; int childLeft = 0; int childTop = 0; if (lp.isDecor) { final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getMeasuredWidth(); break; case Gravity.CENTER_HORIZONTAL: childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft); break; case Gravity.RIGHT: childLeft = width - paddingRight - child.getMeasuredWidth(); paddingRight += child.getMeasuredWidth(); break; } switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getMeasuredHeight(); break; case Gravity.CENTER_VERTICAL: childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop); break; case Gravity.BOTTOM: childTop = height - paddingBottom - child.getMeasuredHeight(); paddingBottom += child.getMeasuredHeight(); break; } childLeft += scrollX; decorCount++; child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } else if ((ii = infoForChild(child)) != null) { int loff = (width + mPageMargin) * ii.position; childLeft = paddingLeft + loff; childTop = paddingTop; // if (DEBUG) Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object // + ":" + childLeft + "," + childTop + " " + child.getMeasuredWidth() // + "x" + child.getMeasuredHeight()); child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } } } mTopPageBounds = paddingTop; mBottomPageBounds = height - paddingBottom; mDecorChildCount = decorCount; mFirstLayout = false; }
From source file:administrator.example.com.myscrollview.VerticalViewPager.java
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // For simple implementation, or internal size is always 0. // We depend on the container to specify the layout size of // our view. We can't really know what it is since we will be // adding and removing different arbitrary views and do not // want the layout to change as this happens. setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec)); // Children are just made to fill our space. int childWidthSize = getMeasuredWidth() - getPaddingLeft() - getPaddingRight(); int childHeightSize = getMeasuredHeight() - getPaddingTop() - getPaddingBottom(); /*// w w w .j a va 2s . c o m * Make sure all children have been properly measured. Decor views first. * Right now we cheat and make this less complicated by assuming decor * views won't intersect. We will pin to edges based on gravity. */ int size = getChildCount(); for (int i = 0; i < size; ++i) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp != null && lp.isDecor) { final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; Log.d(TAG, "gravity: " + lp.gravity + " hgrav: " + hgrav + " vgrav: " + vgrav); int widthMode = MeasureSpec.AT_MOST; int heightMode = MeasureSpec.AT_MOST; boolean consumeVertical = vgrav == Gravity.TOP || vgrav == Gravity.BOTTOM; boolean consumeHorizontal = hgrav == Gravity.LEFT || hgrav == Gravity.RIGHT; if (consumeVertical) { widthMode = MeasureSpec.EXACTLY; } else if (consumeHorizontal) { heightMode = MeasureSpec.EXACTLY; } /* end of if */ final int widthSpec = MeasureSpec.makeMeasureSpec(childWidthSize, widthMode); final int heightSpec = MeasureSpec.makeMeasureSpec(childHeightSize, heightMode); child.measure(widthSpec, heightSpec); if (consumeVertical) { childHeightSize -= child.getMeasuredHeight(); } else if (consumeHorizontal) { childWidthSize -= child.getMeasuredWidth(); } /* end of if */ } /* end of if */ } /* end of if */ } /* end of for */ mChildWidthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY); mChildHeightMeasureSpec = MeasureSpec.makeMeasureSpec(childHeightSize, MeasureSpec.EXACTLY); // Make sure we have created all fragments that we need to have shown. mInLayout = true; populate(); mInLayout = false; // Page views next. size = getChildCount(); for (int i = 0; i < size; ++i) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { if (DEBUG) Log.v(TAG, "Measuring #" + i + " " + child + ": " + mChildWidthMeasureSpec); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp == null || !lp.isDecor) { child.measure(mChildWidthMeasureSpec, mChildHeightMeasureSpec); } /* end of if */ } /* end of if */ } /* end of for */ }
From source file:beichen.douban.ui.view.LazyViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { mInLayout = true;//from ww w. ja va 2 s .c om populate(); mInLayout = false; final int count = getChildCount(); int width = r - l; int height = b - t; int paddingLeft = getPaddingLeft(); int paddingTop = getPaddingTop(); int paddingRight = getPaddingRight(); int paddingBottom = getPaddingBottom(); final int scrollX = getScrollX(); int decorCount = 0; for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); ItemInfo ii; int childLeft = 0; int childTop = 0; if (lp.isDecor) { final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getMeasuredWidth(); break; case Gravity.CENTER_HORIZONTAL: childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft); break; case Gravity.RIGHT: childLeft = width - paddingRight - child.getMeasuredWidth(); paddingRight += child.getMeasuredWidth(); break; } switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getMeasuredHeight(); break; case Gravity.CENTER_VERTICAL: childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop); break; case Gravity.BOTTOM: childTop = height - paddingBottom - child.getMeasuredHeight(); paddingBottom += child.getMeasuredHeight(); break; } childLeft += scrollX; decorCount++; child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } else if ((ii = infoForChild(child)) != null) { int loff = (width + mPageMargin) * ii.position; childLeft = paddingLeft + loff; childTop = paddingTop; if (DEBUG) Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + "," + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight()); child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } } } mTopPageBounds = paddingTop; mBottomPageBounds = height - paddingBottom; mDecorChildCount = decorCount; mFirstLayout = false; }
From source file:javalibrary.android.ui.VerticalViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { mInLayout = true;/*from w w w . ja v a 2 s . c o m*/ populate(); mInLayout = false; final int count = getChildCount(); int width = r - l; int height = b - t; int paddingLeft = getPaddingLeft(); int paddingTop = getPaddingTop(); int paddingRight = getPaddingRight(); int paddingBottom = getPaddingBottom(); final int scrollX = getScrollX(); final int scrollY = getScrollY(); int decorCount = 0; for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); ItemInfo ii; int childLeft = 0; int childTop = 0; if (lp.isDecor) { final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getMeasuredWidth(); break; case Gravity.CENTER_HORIZONTAL: childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft); break; case Gravity.RIGHT: childLeft = width - paddingRight - child.getMeasuredWidth(); paddingRight += child.getMeasuredWidth(); break; } switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getMeasuredHeight(); break; case Gravity.CENTER_VERTICAL: childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop); break; case Gravity.BOTTOM: childTop = height - paddingBottom - child.getMeasuredHeight(); paddingBottom += child.getMeasuredHeight(); break; } // childLeft += scrollX; childTop += scrollY; decorCount++; child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } else if ((ii = infoForChild(child)) != null) { /*int loff = (width + mPageMargin) * ii.position; childLeft = paddingLeft + loff; childTop = paddingTop;*/ int loff = (height + mPageMargin) * ii.position; childLeft = paddingLeft; childTop = paddingTop + loff; if (DEBUG) Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + "," + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight()); child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } } } mTopPageBounds = paddingTop; mBottomPageBounds = height - paddingBottom; mDecorChildCount = decorCount; mFirstLayout = false; }
From source file:com.example.view.VerticalViewPager.java
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // For simple implementation, or internal size is always 0. // We depend on the container to specify the layout size of // our view. We can't really know what it is since we will be // adding and removing different arbitrary views and do not // want the layout to change as this happens. setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec)); // Children are just made to fill our space. int childWidthSize = getMeasuredWidth() - getPaddingLeft() - getPaddingRight(); int childHeightSize = getMeasuredHeight() - getPaddingTop() - getPaddingBottom(); /*//from www . j a v a 2 s.c om * Make sure all children have been properly measured. Decor views * first. Right now we cheat and make this less complicated by assuming * decor views won't intersect. We will pin to edges based on gravity. */ int size = getChildCount(); for (int i = 0; i < size; ++i) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp != null && lp.isDecor) { final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; Log.d(TAG, "gravity: " + lp.gravity + " hgrav: " + hgrav + " vgrav: " + vgrav); int widthMode = MeasureSpec.AT_MOST; int heightMode = MeasureSpec.AT_MOST; boolean consumeVertical = vgrav == Gravity.TOP || vgrav == Gravity.BOTTOM; boolean consumeHorizontal = hgrav == Gravity.LEFT || hgrav == Gravity.RIGHT; if (consumeVertical) { widthMode = MeasureSpec.EXACTLY; } else if (consumeHorizontal) { heightMode = MeasureSpec.EXACTLY; } /* end of if */ final int widthSpec = MeasureSpec.makeMeasureSpec(childWidthSize, widthMode); final int heightSpec = MeasureSpec.makeMeasureSpec(childHeightSize, heightMode); child.measure(widthSpec, heightSpec); if (consumeVertical) { childHeightSize -= child.getMeasuredHeight(); } else if (consumeHorizontal) { childWidthSize -= child.getMeasuredWidth(); } /* end of if */ } /* end of if */ } /* end of if */ } /* end of for */ mChildWidthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY); mChildHeightMeasureSpec = MeasureSpec.makeMeasureSpec(childHeightSize, MeasureSpec.EXACTLY); // Make sure we have created all fragments that we need to have shown. mInLayout = true; populate(); mInLayout = false; // Page views next. size = getChildCount(); for (int i = 0; i < size; ++i) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { if (DEBUG) Log.v(TAG, "Measuring #" + i + " " + child + ": " + mChildWidthMeasureSpec); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp == null || !lp.isDecor) { child.measure(mChildWidthMeasureSpec, mChildHeightMeasureSpec); } /* end of if */ } /* end of if */ } /* end of for */ }
From source file:org.immopoly.android.widget.ViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { mInLayout = true;/* w ww. java 2s .c o m*/ populate(); mInLayout = false; final int count = getChildCount(); int width = forcedChildWidth > 0 ? forcedChildWidth : r - l; int height = b - t; int paddingLeft = getPaddingLeft(); int paddingTop = getPaddingTop(); int paddingRight = getPaddingRight(); int paddingBottom = getPaddingBottom(); final int scrollX = getScrollX(); int decorCount = 0; for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); ItemInfo ii; int childLeft = 0; int childTop = 0; if (lp.isDecor) { final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getMeasuredWidth(); break; case Gravity.CENTER_HORIZONTAL: childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft); break; case Gravity.RIGHT: childLeft = width - paddingRight - child.getMeasuredWidth(); paddingRight += child.getMeasuredWidth(); break; } switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getMeasuredHeight(); break; case Gravity.CENTER_VERTICAL: childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop); break; case Gravity.BOTTOM: childTop = height - paddingBottom - child.getMeasuredHeight(); paddingBottom += child.getMeasuredHeight(); break; } childLeft += scrollX; decorCount++; child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } else if ((ii = infoForChild(child)) != null) { int loff = (width + mPageMargin) * ii.position; childLeft = paddingLeft + loff; childTop = paddingTop; if (DEBUG) Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + "," + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight()); child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); } } } mTopPageBounds = paddingTop; mBottomPageBounds = height - paddingBottom; mDecorChildCount = decorCount; mFirstLayout = false; }
From source file:com.zyk.drawerlayout.widget.DrawerLayout.java
/** * @param gravity the gravity of the child to return. If specified as a * relative value, it will be resolved according to the current * layout direction.// www . j av a2 s .c o m * @return the drawer with the specified gravity */ View findDrawerWithGravity(int gravity) { final int absHorizGravity = GravityCompat.getAbsoluteGravity(gravity, ViewCompat.getLayoutDirection(this)) & Gravity.HORIZONTAL_GRAVITY_MASK; final int absVerticalGravity = GravityCompat.getAbsoluteGravity(gravity, ViewCompat.getLayoutDirection(this)) & Gravity.VERTICAL_GRAVITY_MASK; final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final int childAbsGravity = getDrawerViewAbsoluteGravity(child); boolean h = (absHorizGravity != 0) && ((childAbsGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == absHorizGravity); boolean v = (absVerticalGravity != 0) && ((childAbsGravity & Gravity.VERTICAL_GRAVITY_MASK) == absVerticalGravity); if (h || v) { return child; } } return null; }
From source file:android.support.v7.internal.widget.ActionBarView.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int x = getPaddingLeft(); final int y = getPaddingTop(); final int contentHeight = b - t - getPaddingTop() - getPaddingBottom(); if (contentHeight <= 0) { // Nothing to do if we can't see anything. return;/*from w ww . j a v a 2 s .c om*/ } HomeView homeLayout = mExpandedActionView != null ? mExpandedHomeLayout : mHomeLayout; if (homeLayout.getVisibility() != GONE) { final int leftOffset = homeLayout.getLeftOffset(); x += positionChild(homeLayout, x + leftOffset, y, contentHeight) + leftOffset; } if (mExpandedActionView == null) { final boolean showTitle = mTitleLayout != null && mTitleLayout.getVisibility() != GONE && (mDisplayOptions & ActionBar.DISPLAY_SHOW_TITLE) != 0; if (showTitle) { x += positionChild(mTitleLayout, x, y, contentHeight); } switch (mNavigationMode) { case ActionBar.NAVIGATION_MODE_STANDARD: break; case ActionBar.NAVIGATION_MODE_LIST: if (mListNavLayout != null) { if (showTitle) { x += mItemPadding; } x += positionChild(mListNavLayout, x, y, contentHeight) + mItemPadding; } break; case ActionBar.NAVIGATION_MODE_TABS: if (mTabScrollView != null) { if (showTitle) { x += mItemPadding; } x += positionChild(mTabScrollView, x, y, contentHeight) + mItemPadding; } break; } } int menuLeft = r - l - getPaddingRight(); if (mMenuView != null && mMenuView.getParent() == this) { positionChildInverse(mMenuView, menuLeft, y, contentHeight); menuLeft -= mMenuView.getMeasuredWidth(); } if (mIndeterminateProgressView != null && mIndeterminateProgressView.getVisibility() != GONE) { positionChildInverse(mIndeterminateProgressView, menuLeft, y, contentHeight); menuLeft -= mIndeterminateProgressView.getMeasuredWidth(); } View customView = null; if (mExpandedActionView != null) { customView = mExpandedActionView; } else if ((mDisplayOptions & ActionBar.DISPLAY_SHOW_CUSTOM) != 0 && mCustomNavView != null) { customView = mCustomNavView; } if (customView != null) { ViewGroup.LayoutParams lp = customView.getLayoutParams(); final ActionBar.LayoutParams ablp = lp instanceof ActionBar.LayoutParams ? (ActionBar.LayoutParams) lp : null; final int gravity = ablp != null ? ablp.gravity : DEFAULT_CUSTOM_GRAVITY; final int navWidth = customView.getMeasuredWidth(); int topMargin = 0; int bottomMargin = 0; if (ablp != null) { x += ablp.leftMargin; menuLeft -= ablp.rightMargin; topMargin = ablp.topMargin; bottomMargin = ablp.bottomMargin; } int hgravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK; // See if we actually have room to truly center; if not push against left or right. if (hgravity == Gravity.CENTER_HORIZONTAL) { final int centeredLeft = (getWidth() - navWidth) / 2; if (centeredLeft < x) { hgravity = Gravity.LEFT; } else if (centeredLeft + navWidth > menuLeft) { hgravity = Gravity.RIGHT; } } else if (gravity == -1) { hgravity = Gravity.LEFT; } int xpos = 0; switch (hgravity) { case Gravity.CENTER_HORIZONTAL: xpos = (getWidth() - navWidth) / 2; break; case Gravity.LEFT: xpos = x; break; case Gravity.RIGHT: xpos = menuLeft - navWidth; break; } int vgravity = gravity & Gravity.VERTICAL_GRAVITY_MASK; if (gravity == -1) { vgravity = Gravity.CENTER_VERTICAL; } int ypos = 0; switch (vgravity) { case Gravity.CENTER_VERTICAL: final int paddedTop = getPaddingTop(); final int paddedBottom = getHeight() - getPaddingBottom(); ypos = ((paddedBottom - paddedTop) - customView.getMeasuredHeight()) / 2; break; case Gravity.TOP: ypos = getPaddingTop() + topMargin; break; case Gravity.BOTTOM: ypos = getHeight() - getPaddingBottom() - customView.getMeasuredHeight() - bottomMargin; break; } final int customWidth = customView.getMeasuredWidth(); customView.layout(xpos, ypos, xpos + customWidth, ypos + customView.getMeasuredHeight()); x += customWidth; } if (mProgressView != null) { mProgressView.bringToFront(); final int halfProgressHeight = mProgressView.getMeasuredHeight() / 2; mProgressView.layout(mProgressBarPadding, -halfProgressHeight, mProgressBarPadding + mProgressView.getMeasuredWidth(), halfProgressHeight); } }
From source file:com.jecelyin.editor.v2.widget.AnyDrawerLayout.java
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthMode = MeasureSpec.getMode(widthMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); int widthSize = MeasureSpec.getSize(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); if (widthMode != MeasureSpec.EXACTLY || heightMode != MeasureSpec.EXACTLY) { if (isInEditMode()) { // Don't crash the layout editor. Consume all of the space if specified // or pick a magic number from thin air otherwise. // TODO Better communication with tools of this bogus state. // It will crash on a real device. if (widthMode == MeasureSpec.AT_MOST) { widthMode = MeasureSpec.EXACTLY; } else if (widthMode == MeasureSpec.UNSPECIFIED) { widthMode = MeasureSpec.EXACTLY; widthSize = 300;/* w w w . j a v a 2 s . c o m*/ } if (heightMode == MeasureSpec.AT_MOST) { heightMode = MeasureSpec.EXACTLY; } else if (heightMode == MeasureSpec.UNSPECIFIED) { heightMode = MeasureSpec.EXACTLY; heightSize = 300; } } else { throw new IllegalArgumentException("DrawerLayout must be measured with MeasureSpec.EXACTLY."); } } setMeasuredDimension(widthSize, heightSize); final boolean applyInsets = mLastInsets != null && ViewCompat.getFitsSystemWindows(this); final int layoutDirection = ViewCompat.getLayoutDirection(this); // Only one drawer is permitted along each vertical edge (left / right). These two booleans // are tracking the presence of the edge drawers. boolean hasDrawerOnLeftEdge = false; boolean hasDrawerOnRightEdge = false; boolean hasDrawerOnBottomEdge = false; final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); if (child.getVisibility() == GONE) { continue; } final @EdgeGravity int vchildGravity = getDrawerViewAbsoluteGravity(child) & Gravity.VERTICAL_GRAVITY_MASK; boolean isBottomEdgeDrawer = (vchildGravity == Gravity.BOTTOM); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (applyInsets && !isBottomEdgeDrawer) { final int cgrav = GravityCompat.getAbsoluteGravity(lp.gravity, layoutDirection); if (ViewCompat.getFitsSystemWindows(child)) { IMPL.dispatchChildInsets(child, mLastInsets, cgrav); } else { IMPL.applyMarginInsets(lp, mLastInsets, cgrav); } } if (isContentView(child)) { // Content views get measured at exactly the layout's size. final int contentWidthSpec = MeasureSpec.makeMeasureSpec(widthSize - lp.leftMargin - lp.rightMargin, MeasureSpec.EXACTLY); final int contentHeightSpec = MeasureSpec .makeMeasureSpec(heightSize - lp.topMargin - lp.bottomMargin, MeasureSpec.EXACTLY); child.measure(contentWidthSpec, contentHeightSpec); } else if (isDrawerView(child)) { if (SET_DRAWER_SHADOW_FROM_ELEVATION) { if (ViewCompat.getElevation(child) != mDrawerElevation) { ViewCompat.setElevation(child, mDrawerElevation); } } final @EdgeGravity int childGravity = getDrawerViewAbsoluteGravity(child) & Gravity.HORIZONTAL_GRAVITY_MASK; // final @EdgeGravity int vchildGravity = // getDrawerViewAbsoluteGravity(child) & Gravity.VERTICAL_GRAVITY_MASK; // Note that the isDrawerView check guarantees that childGravity here is either // LEFT or RIGHT boolean isLeftEdgeDrawer = (childGravity == Gravity.LEFT); if ((isLeftEdgeDrawer && hasDrawerOnLeftEdge) || (isBottomEdgeDrawer && hasDrawerOnBottomEdge) || (!isBottomEdgeDrawer && !isLeftEdgeDrawer && hasDrawerOnRightEdge)) { throw new IllegalStateException("Child drawer has absolute gravity " + gravityToString(isBottomEdgeDrawer ? vchildGravity : childGravity) + " but this " + TAG + " already has a " + "drawer view along that edge"); } if (isBottomEdgeDrawer) { hasDrawerOnBottomEdge = true; } else if (isLeftEdgeDrawer) { hasDrawerOnLeftEdge = true; } else { hasDrawerOnRightEdge = true; } // View ??? int minDrawerMargin = isBottomEdgeDrawer ? 0 : mMinDrawerMargin; final int drawerWidthSpec = getChildMeasureSpec(widthMeasureSpec, minDrawerMargin + lp.leftMargin + lp.rightMargin, lp.width); final int drawerHeightSpec = getChildMeasureSpec(heightMeasureSpec, lp.topMargin + lp.bottomMargin, lp.height); child.measure(drawerWidthSpec, drawerHeightSpec); } else { throw new IllegalStateException("Child " + child + " at index " + i + " does not have a valid layout_gravity - must be Gravity.LEFT, " + "Gravity.RIGHT, Gravity.BOTTOM or Gravity.NO_GRAVITY"); } } }
From source file:android.support.design.widget.CoordinatorLayout.java
/** * Lay out a child view with respect to a keyline. * * <p>The keyline represents a horizontal offset from the unpadded starting edge of * the CoordinatorLayout. The child's gravity will affect how it is positioned with * respect to the keyline.</p>//from w w w . j av a 2 s .co m * * @param child child to lay out * @param keyline offset from the starting edge in pixels of the keyline to align with * @param layoutDirection ViewCompat constant for layout direction */ private void layoutChildWithKeyline(View child, int keyline, int layoutDirection) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); final int absGravity = GravityCompat.getAbsoluteGravity(resolveKeylineGravity(lp.gravity), layoutDirection); final int hgrav = absGravity & Gravity.HORIZONTAL_GRAVITY_MASK; final int vgrav = absGravity & Gravity.VERTICAL_GRAVITY_MASK; final int width = getWidth(); final int height = getHeight(); final int childWidth = child.getMeasuredWidth(); final int childHeight = child.getMeasuredHeight(); if (layoutDirection == ViewCompat.LAYOUT_DIRECTION_RTL) { keyline = width - keyline; } int left = getKeyline(keyline) - childWidth; int top = 0; switch (hgrav) { default: case Gravity.LEFT: // Nothing to do. break; case Gravity.RIGHT: left += childWidth; break; case Gravity.CENTER_HORIZONTAL: left += childWidth / 2; break; } switch (vgrav) { default: case Gravity.TOP: // Do nothing, we're already in position. break; case Gravity.BOTTOM: top += childHeight; break; case Gravity.CENTER_VERTICAL: top += childHeight / 2; break; } // Obey margins and padding left = Math.max(getPaddingLeft() + lp.leftMargin, Math.min(left, width - getPaddingRight() - childWidth - lp.rightMargin)); top = Math.max(getPaddingTop() + lp.topMargin, Math.min(top, height - getPaddingBottom() - childHeight - lp.bottomMargin)); child.layout(left, top, left + childWidth, top + childHeight); }