List of usage examples for android.view Gravity VERTICAL_GRAVITY_MASK
int VERTICAL_GRAVITY_MASK
To view the source code for android.view Gravity VERTICAL_GRAVITY_MASK.
Click Source Link
From source file:com.viewpagerindicator.MyDirectionalViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { 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; // First pass - decor views. We need to do this in two passes so that // we have the proper offsets for non-decor views later. for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 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; }/* ww w. j a va2 s . c om*/ 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; } if (mOrientation == HORIZONTAL) { childLeft += scrollX; } else { childTop += scrollY; } child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); decorCount++; } } } final int childWidth = width - paddingLeft - paddingRight; final int childHeight = height - paddingTop - paddingBottom; // Page views. Do this once we have the right padding offsets from above. for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); ItemInfo ii; if (!lp.isDecor && (ii = infoForChild(child)) != null) { int loff; int childLeft; int childTop; if (mOrientation == HORIZONTAL) { loff = (int) (childWidth * ii.offset); childLeft = paddingLeft + loff; childTop = paddingTop; if (lp.needsMeasure) { // This was added during layout and needs measurement. // Do it now that we know what we're working with. lp.needsMeasure = false; final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth * lp.widthFactor), MeasureSpec.EXACTLY); final int heightSpec = MeasureSpec.makeMeasureSpec( (int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY); child.measure(widthSpec, heightSpec); } } else { loff = (int) (childHeight * ii.offset); childLeft = paddingLeft; childTop = paddingTop + loff; if (lp.needsMeasure) { // This was added during layout and needs measurement. // Do it now that we know what we're working with. lp.needsMeasure = false; final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth), MeasureSpec.EXACTLY); final int heightSpec = MeasureSpec.makeMeasureSpec((int) (childHeight * lp.widthFactor), MeasureSpec.EXACTLY); child.measure(widthSpec, heightSpec); } } // 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; if (mFirstLayout) { scrollToItem(mCurItem, false, 0, false); } mFirstLayout = false; }
From source file:dev.dworks.libs.widget.ViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { 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; // First pass - decor views. We need to do this in two passes so that // we have the proper offsets for non-decor views later. for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 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; }/*from w w w. j av a2s .co m*/ 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; } if (mOrientation == HORIZONTAL) { childLeft += scrollX; } else { childTop += scrollY; } child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); decorCount++; } } } final int childWidth = width - paddingLeft - paddingRight; final int childHeight = height - paddingTop - paddingBottom; // Page views. Do this once we have the right padding offsets from above. for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final LayoutParams lp = (LayoutParams) child.getLayoutParams(); ItemInfo ii; if (!lp.isDecor && (ii = infoForChild(child)) != null) { int loff; int childLeft = paddingLeft; int childTop = paddingTop; if (mOrientation == HORIZONTAL) { loff = (int) (childWidth * ii.offset); childLeft += loff; } else { loff = (int) (childHeight * ii.offset); childTop += loff; } if (lp.needsMeasure) { // This was added during layout and needs measurement. // Do it now that we know what we're working with. lp.needsMeasure = false; final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth * lp.widthFactor), MeasureSpec.EXACTLY); final int heightSpec = MeasureSpec.makeMeasureSpec((int) (childHeight), MeasureSpec.EXACTLY); child.measure(widthSpec, heightSpec); } 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()); } } } if (mOrientation == HORIZONTAL) { mTopPageBounds = paddingTop; mBottomPageBounds = height - paddingBottom; } else { mLeftPageBounds = paddingLeft; mRightPageBounds = width - paddingRight; } mDecorChildCount = decorCount; if (mFirstLayout) { scrollToItem(mCurItem, false, 0, false); } mFirstLayout = false; }
From source file:org.ohmage.widget.VerticalViewPager.java
/** * This method will be invoked when the current page is scrolled, either as part * of a programmatically initiated smooth scroll or a user initiated touch scroll. * If you override this method you must call through to the superclass implementation * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled * returns./* ww w. j a v a2s.c o m*/ * * @param position Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset Value from [0, 1) indicating the offset from the page at position. * @param offsetPixels Value in pixels indicating the offset from position. */ protected void onPageScrolled(int position, double offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { final int scrollY = getScrollY(); int paddingTop = getPaddingTop(); int paddingBottom = getPaddingBottom(); final int height = getHeight(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childTop = 0; switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getHeight(); 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; } childTop += scrollY; final int childOffset = childTop - child.getTop(); if (childOffset != 0) { child.offsetTopAndBottom(childOffset); } } } if (mSeenPositionMin < 0 || position < mSeenPositionMin) { mSeenPositionMin = position; } if (mSeenPositionMax < 0 || Math.ceil(position + offset) > mSeenPositionMax) { mSeenPositionMax = position + 1; } if (mOnPageChangeListener != null) { mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mInternalPageChangeListener != null) { mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mPageTransformer != null) { final int scrollY = getScrollY(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; final float transformPos = (float) (child.getTop() - scrollY) / getHeight(); mPageTransformer.transformPage(child, transformPos); } } mCalledSuper = true; }
From source file:eu.kanade.tachiyomi.ui.reader.viewer.pager.vertical.VerticalViewPagerImpl.java
/** * This method will be invoked when the current page is scrolled, either as part * of a programmatically initiated smooth scroll or a user initiated touch scroll. * If you override this method you must call through to the superclass implementation * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled * returns./*w ww . ja v a2s .c o m*/ * * @param position Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset Value from [0, 1) indicating the offset from the page at position. * @param offsetPixels Value in pixels indicating the offset from position. */ @CallSuper protected void onPageScrolled(int position, float offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { final int scrollY = getScrollY(); int paddingTop = getPaddingTop(); int paddingBottom = getPaddingBottom(); final int height = getHeight(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childTop; switch (vgrav) { case Gravity.TOP: childTop = paddingTop; paddingTop += child.getHeight(); 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; default: childTop = paddingTop; break; } childTop += scrollY; final int childOffset = childTop - child.getTop(); if (childOffset != 0) { child.offsetTopAndBottom(childOffset); } } } dispatchOnPageScrolled(position, offset, offsetPixels); if (mPageTransformer != null) { final int scrollY = getScrollY(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; final float transformPos = (float) (child.getTop() - scrollY) / getClientHeight(); mPageTransformer.transformPage(child, transformPos); } } mCalledSuper = true; }
From source file:android.improving.utils.views.cardsview.OrientedViewPager.java
/** * This method will be invoked when the current page is scrolled, either as part * of a programmatically initiated smooth scroll or a user initiated touch scroll. * If you override this method you must call through to the superclass implementation * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled * returns.//from ww w. ja v a 2 s. c om * * @param position Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset Value from [0, 1) indicating the offset from the page at position. * @param offsetPixels Value in pixels indicating the offset from position. */ protected void onPageScrolled(int position, float offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { if (mOrientation == Orientation.VERTICAL) { final int scrollY = getScrollY(); int paddingTop = getPaddingTop(); int paddingBottom = getPaddingBottom(); final int height = getHeight(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childTop = 0; switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getHeight(); 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; } childTop += scrollY; final int childOffset = childTop - child.getTop(); if (childOffset != 0) { child.offsetTopAndBottom(childOffset); } } } else { final int scrollX = getScrollX(); int paddingLeft = getPaddingLeft(); int paddingRight = getPaddingRight(); final int width = getWidth(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; int childLeft = 0; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getWidth(); 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; } childLeft += scrollX; final int childOffset = childLeft - child.getLeft(); if (childOffset != 0) { child.offsetLeftAndRight(childOffset); } } } } if (mOnPageChangeListener != null) { mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mInternalPageChangeListener != null) { mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mPageTransformer != null) { final int scroll = (mOrientation == Orientation.VERTICAL) ? getScrollY() : getScrollX(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; final float transformPos = (float) (((mOrientation == Orientation.VERTICAL) ? child.getTop() : child.getLeft()) - scroll) / getClientSize(); mPageTransformer.transformPage(child, transformPos); } } mCalledSuper = true; }
From source file:com.example.sky.test.view.ViewPager.java
@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { 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; // First pass - decor views. We need to do this in two passes so that // we have the proper offsets for non-decor views later. for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final ViewPager.LayoutParams lp = (ViewPager.LayoutParams) child.getLayoutParams(); 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; }/*from w w w .ja v a2s . c om*/ 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; child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight()); decorCount++; } } } final int childWidth = width - paddingLeft - paddingRight; // Page views. Do this once we have the right padding offsets from above. for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != GONE) { final ViewPager.LayoutParams lp = (ViewPager.LayoutParams) child.getLayoutParams(); ItemInfo ii; if (!lp.isDecor && (ii = infoForChild(child)) != null) { int loff = (int) (childWidth * ii.offset); int childLeft = paddingLeft + loff; int childTop = paddingTop; if (lp.needsMeasure) { // This was added during layout and needs measurement. // Do it now that we know what we're working with. lp.needsMeasure = false; final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth * lp.widthFactor), MeasureSpec.EXACTLY); final int heightSpec = MeasureSpec .makeMeasureSpec((int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY); child.measure(widthSpec, heightSpec); } 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; if (mFirstLayout) { scrollToItem(mCurItem, false, 0, false); } mFirstLayout = false; }
From source file:com.ifnoif.androidtestdemo.customview.VViewPager.java
/** * This method will be invoked when the current page is scrolled, either as part * of a programmatically initiated smooth scroll or a user initiated touch scroll. * If you override this method you must call through to the superclass implementation * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled * returns.// w ww .j a v a 2 s.c o m * * @param position Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset Value from [0, 1) indicating the offset from the page at position. * @param offsetPixels Value in pixels indicating the offset from position. */ @CallSuper protected void onPageScrolled(int position, float offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { final int scrollY = getScrollY(); int paddingTop = getPaddingTop(); int paddingBottom = getPaddingBottom(); final int height = getHeight(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childTop = 0; switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getHeight(); 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; } childTop += scrollY; final int childOffset = childTop - child.getTop(); if (childOffset != 0) { child.offsetTopAndBottom(childOffset); Log.d(TAG, "offsetTopAndBottom childOffset:" + childOffset + " tag:" + child.getTag()); } } } dispatchOnPageScrolled(position, offset, offsetPixels); if (mPageTransformer != null) { final int scrollY = getScrollY(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; final float transformPos = (float) (child.getTop() - scrollY) / getClientHeight(); mPageTransformer.transformPage(child, transformPos); Log.d(TAG, "transformPage pos:" + transformPos + " tag:" + child.getTag()); } } mCalledSuper = true; }
From source file:com.telerik.examples.primitives.ExampleViewPagerBase.java
/** * This method will be invoked when the current page is scrolled, either as part * of a programmatically initiated smooth scroll or a user initiated touch scroll. * If you override this method you must call through to the superclass implementation * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled * returns./*from w ww .j av a 2 s . co m*/ * * @param position Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset Value from [0, 1) indicating the offset from the page at position. * @param offsetPixels Value in pixels indicating the offset from position. */ protected void onPageScrolled(int position, float offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { final int scroll = getScroll(this); int paddingStart = getPaddingStart(this); int paddingEnd = getPaddingEnd(this); final int length = getViewLength(this); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int gravity = this.orientation == LinearLayout.HORIZONTAL ? lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK : lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childStart = 0; switch (gravity) { default: childStart = paddingStart; break; case Gravity.LEFT: case Gravity.TOP: childStart = paddingStart; paddingStart += this.getViewLength(child); break; case Gravity.CENTER_HORIZONTAL: case Gravity.CENTER_VERTICAL: childStart = Math.max((length - getViewMeasuredLength(child)) / 2, paddingStart); break; case Gravity.RIGHT: case Gravity.BOTTOM: childStart = length - paddingEnd - getViewMeasuredLength(child); paddingEnd += getViewMeasuredLength(child); break; } childStart += scroll; final int childOffset = childStart - getStart(child); if (childOffset != 0) { offsetChildStartEnd(child, childOffset); } } } if (mOnPageChangeListener != null) { mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mInternalPageChangeListener != null) { mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mPageTransformer != null) { final int scroll = getScroll(this); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; final float transformPos = (float) (getStart(child) - scroll) / getClientLength(); mPageTransformer.transformPage(child, transformPos); } } mCalledSuper = true; }
From source file:cn.androidy.materialdesignsample.ryanharterviewpager.ViewPager.java
/** * This method will be invoked when the current page is scrolled, either as part * of a programmatically initiated smooth scroll or a user initiated touch scroll. * If you override this method you must call through to the superclass implementation * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled * returns.//from w w w . jav a2s . com * * @param position Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset Value from [0, 1) indicating the offset from the page at position. * @param offsetPixels Value in pixels indicating the offset from position. */ protected void onPageScrolled(int position, float offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { // TODO This is where I start getting tired. Refactor this better later. if (isOrientationHorizontal()) { final int scrollX = getScrollX(); int paddingLeft = getPaddingLeft(); int paddingRight = getPaddingRight(); final int width = getWidth(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; int childLeft = 0; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getWidth(); 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; } childLeft += scrollX; final int childOffset = childLeft - child.getLeft(); if (childOffset != 0) { child.offsetLeftAndRight(childOffset); } } } else { final int scrollY = getScrollY(); int paddingTop = getPaddingTop(); int paddingBottom = getPaddingBottom(); final int height = getHeight(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childTop = 0; switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getHeight(); 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; } childTop += scrollY; final int childOffset = childTop - child.getTop(); if (childOffset != 0) { child.offsetTopAndBottom(childOffset); } } } } if (mOnPageChangeListener != null) { mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mInternalPageChangeListener != null) { mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mPageTransformer != null) { final boolean horizontal = isOrientationHorizontal(); final int scroll = horizontal ? getScrollX() : getScrollY(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; float transformPos; if (horizontal) { transformPos = (float) (child.getLeft() - scroll) / getClientWidth(); } else { transformPos = (float) (child.getTop() - scroll) / getClientHeight(); } mPageTransformer.transformPage(child, transformPos); } } mCalledSuper = true; }
From source file:com.guide.ViewPager.java
/** * This method will be invoked when the current page is scrolled, either as * part of a programmatically initiated smooth scroll or a user initiated * touch scroll. If you override this method you must call through to the * superclass implementation (e.g. super.onPageScrolled(position, offset, * offsetPixels)) before onPageScrolled returns. * /*from w w w . j a v a2 s. co m*/ * @param position * Position index of the first page currently being displayed. * Page position+1 will be visible if positionOffset is nonzero. * @param offset * Value from [0, 1) indicating the offset from the page at * position. * @param offsetPixels * Value in pixels indicating the offset from position. */ protected void onPageScrolled(int position, float offset, int offsetPixels) { // Offset any decor views if needed - keep them on-screen at all times. if (mDecorChildCount > 0) { // TODO This is where I start getting tired. Refactor this better // later. if (isOrientationHorizontal()) { final int scrollX = getScrollX(); int paddingLeft = getPaddingLeft(); int paddingRight = getPaddingRight(); final int width = getWidth(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK; int childLeft = 0; switch (hgrav) { default: childLeft = paddingLeft; break; case Gravity.LEFT: childLeft = paddingLeft; paddingLeft += child.getWidth(); 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; } childLeft += scrollX; final int childOffset = childLeft - child.getLeft(); if (childOffset != 0) { child.offsetLeftAndRight(childOffset); } } } else { final int scrollY = getScrollY(); int paddingTop = getPaddingTop(); int paddingBottom = getPaddingBottom(); final int height = getHeight(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (!lp.isDecor) continue; final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK; int childTop = 0; switch (vgrav) { default: childTop = paddingTop; break; case Gravity.TOP: childTop = paddingTop; paddingTop += child.getHeight(); 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; } childTop += scrollY; final int childOffset = childTop - child.getTop(); if (childOffset != 0) { child.offsetTopAndBottom(childOffset); } } } } if (mOnPageChangeListener != null) { mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mInternalPageChangeListener != null) { mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels); } if (mPageTransformer != null) { final boolean horizontal = isOrientationHorizontal(); final int scroll = horizontal ? getScrollX() : getScrollY(); final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); if (lp.isDecor) continue; float transformPos; if (horizontal) { transformPos = (float) (child.getLeft() - scroll) / getClientWidth(); } else { transformPos = (float) (child.getTop() - scroll) / getClientHeight(); } mPageTransformer.transformPage(child, transformPos); } } mCalledSuper = true; }