List of usage examples for android.view View requestFocus
public final boolean requestFocus(int direction)
From source file:space.qssq.viewpager.ViewPagerX.java
void populate(int newCurrentItem) { ItemInfo oldCurInfo = null;//from w w w . j a va 2 s. co m int focusDirection = View.FOCUS_FORWARD; if (mCurItem != newCurrentItem) { if (isOrientationHorizontal()) { focusDirection = mCurItem < newCurrentItem ? View.FOCUS_RIGHT : View.FOCUS_LEFT; } else { focusDirection = mCurItem < newCurrentItem ? View.FOCUS_DOWN : View.FOCUS_UP; } oldCurInfo = infoForPosition(mCurItem); mCurItem = newCurrentItem; } if (mAdapter == null) { sortChildDrawingOrder(); return; } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); sortChildDrawingOrder(); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (N != mExpectedAdapterCount) { String resName; try { resName = getResources().getResourceName(getId()); } catch (Resources.NotFoundException e) { resName = Integer.toHexString(getId()); } throw new IllegalStateException("The application's PagerAdapterX changed the adapter's" + " contents without calling PagerAdapterX#notifyDataSetChanged!" + " Expected adapter item count: " + mExpectedAdapterCount + ", found: " + N + " Pager id: " + resName + " Pager class: " + getClass() + " Problematic adapter: " + mAdapter.getClass()); } // Locate the currently focused item or add it if needed. int curIndex = -1; ItemInfo curItem = null; for (curIndex = 0; curIndex < mItems.size(); curIndex++) { final ItemInfo ii = mItems.get(curIndex); if (ii.position >= mCurItem) { if (ii.position == mCurItem) curItem = ii; break; } } if (curItem == null && N > 0) { curItem = addNewItem(mCurItem, curIndex); } // Fill 3x the available width or up to the number of offscreen // pages requested to either side, whichever is larger. // If we have no current item we have no work to do. if (curItem != null) { float extraSizeStart = 0.f; int itemIndex = curIndex - 1; ItemInfo ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; final int paddingStart = isOrientationHorizontal() ? getPaddingLeft() : getPaddingTop(); final int clientSize = isOrientationHorizontal() ? getClientWidth() : getClientHeight(); final float startSizeNeeded = clientSize <= 0 ? 0 : 2.f - curItem.sizeFactor + (float) paddingStart / (float) clientSize; for (int pos = mCurItem - 1; pos >= 0; pos--) { if (extraSizeStart >= startSizeNeeded && pos < startPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } itemIndex--; curIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeStart += ii.sizeFactor; itemIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex + 1); extraSizeStart += ii.sizeFactor; curIndex++; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } float extraSizeEnd = curItem.sizeFactor; itemIndex = curIndex + 1; if (extraSizeEnd < 2.f) { ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; final int paddingEnd = isOrientationHorizontal() ? getPaddingRight() : getPaddingBottom(); final float endSizeNeeded = clientSize <= 0 ? 0 : (float) paddingEnd / (float) clientSize + 2.f; for (int pos = mCurItem + 1; pos < N; pos++) { if (extraSizeEnd >= endSizeNeeded && pos > endPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeEnd += ii.sizeFactor; itemIndex++; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex); itemIndex++; extraSizeEnd += ii.sizeFactor; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } } calculatePageOffsets(curItem, curIndex, oldCurInfo); } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); // Check size measurement of current pages and drawing sort order. // Update LayoutParams as needed. final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.childIndex = i; if (!lp.isDecor && lp.sizeFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid width. final ItemInfo ii = infoForChild(child); if (ii != null) { lp.sizeFactor = ii.sizeFactor; lp.position = ii.position; } } } sortChildDrawingOrder(); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(focusDirection)) { break; } } } } } }
From source file:com.viewpagerindicator.MyDirectionalViewPager.java
void populate(int newCurrentItem) { ItemInfo oldCurInfo = null;/* w ww. j ava 2s . c o m*/ int focusDirection = View.FOCUS_FORWARD; if (mCurItem != newCurrentItem) { focusDirection = mCurItem < newCurrentItem ? View.FOCUS_RIGHT : View.FOCUS_LEFT; oldCurInfo = infoForPosition(mCurItem); mCurItem = newCurrentItem; } if (mAdapter == null) { sortChildDrawingOrder(); return; } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); sortChildDrawingOrder(); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (N != mExpectedAdapterCount) { String resName; try { resName = getResources().getResourceName(getId()); } catch (Resources.NotFoundException e) { resName = Integer.toHexString(getId()); } throw new IllegalStateException("The application's PagerAdapter changed the adapter's" + " contents without calling PagerAdapter#notifyDataSetChanged!" + " Expected adapter item count: " + mExpectedAdapterCount + ", found: " + N + " Pager id: " + resName + " Pager class: " + getClass() + " Problematic adapter: " + mAdapter.getClass()); } // Locate the currently focused item or add it if needed. int curIndex = -1; ItemInfo curItem = null; for (curIndex = 0; curIndex < mItems.size(); curIndex++) { final ItemInfo ii = mItems.get(curIndex); if (ii.position >= mCurItem) { if (ii.position == mCurItem) curItem = ii; break; } } if (curItem == null && N > 0) { curItem = addNewItem(mCurItem, curIndex); } // Fill 3x the available width or up to the number of offscreen // pages requested to either side, whichever is larger. // If we have no current item we have no work to do. if (curItem != null) { float extraSize = 0.f; int itemIndex = curIndex - 1; ItemInfo ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; final int clientSize; final float preSizeNeeded; if (mOrientation == HORIZONTAL) { clientSize = getClientWidth(); preSizeNeeded = clientSize <= 0 ? 0 : 2.f - curItem.widthFactor + (float) getPaddingLeft() / (float) clientSize; } else { clientSize = getClientHeight(); preSizeNeeded = clientSize <= 0 ? 0 : 2.f - curItem.widthFactor + (float) getPaddingTop() / (float) clientSize; } for (int pos = mCurItem - 1; pos >= 0; pos--) { if (extraSize >= preSizeNeeded && pos < startPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } itemIndex--; curIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSize += ii.widthFactor; itemIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex + 1); extraSize += ii.widthFactor; curIndex++; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } float extraSizeNext = curItem.widthFactor; itemIndex = curIndex + 1; if (extraSizeNext < 2.f) { ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; final float nextSizeNeeded; if (mOrientation == HORIZONTAL) { nextSizeNeeded = clientSize <= 0 ? 0 : (float) getPaddingRight() / (float) clientSize + 2.f; } else { nextSizeNeeded = clientSize <= 0 ? 0 : (float) getPaddingBottom() / (float) clientSize + 2.f; } for (int pos = mCurItem + 1; pos < N; pos++) { if (extraSizeNext >= nextSizeNeeded && pos > endPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeNext += ii.widthFactor; itemIndex++; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex); itemIndex++; extraSizeNext += ii.widthFactor; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } } calculatePageOffsets(curItem, curIndex, oldCurInfo); } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); // Check width measurement of current pages and drawing sort order. // Update LayoutParams as needed. final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.childIndex = i; if (!lp.isDecor && lp.widthFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid width. final ItemInfo ii = infoForChild(child); if (ii != null) { lp.widthFactor = ii.widthFactor; lp.position = ii.position; } } } sortChildDrawingOrder(); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(focusDirection)) { break; } } } } } }
From source file:com.guide.ViewPager.java
void populate(int newCurrentItem) { ItemInfo oldCurInfo = null;// w w w. j a v a2 s . co m int focusDirection = View.FOCUS_FORWARD; if (mCurItem != newCurrentItem) { if (isOrientationHorizontal()) { focusDirection = mCurItem < newCurrentItem ? View.FOCUS_RIGHT : View.FOCUS_LEFT; } else { focusDirection = mCurItem < newCurrentItem ? View.FOCUS_DOWN : View.FOCUS_UP; } oldCurInfo = infoForPosition(mCurItem); mCurItem = newCurrentItem; } if (mAdapter == null) { sortChildDrawingOrder(); return; } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); sortChildDrawingOrder(); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (N != mExpectedAdapterCount) { String resName; try { resName = getResources().getResourceName(getId()); } catch (Resources.NotFoundException e) { resName = Integer.toHexString(getId()); } throw new IllegalStateException("The application's PagerAdapter changed the adapter's" + " contents without calling PagerAdapter#notifyDataSetChanged!" + " Expected adapter item count: " + mExpectedAdapterCount + ", found: " + N + " Pager id: " + resName + " Pager class: " + getClass() + " Problematic adapter: " + mAdapter.getClass()); } // Locate the currently focused item or add it if needed. int curIndex = -1; ItemInfo curItem = null; for (curIndex = 0; curIndex < mItems.size(); curIndex++) { final ItemInfo ii = mItems.get(curIndex); if (ii.position >= mCurItem) { if (ii.position == mCurItem) curItem = ii; break; } } if (curItem == null && N > 0) { curItem = addNewItem(mCurItem, curIndex); } // Fill 3x the available width or up to the number of offscreen // pages requested to either side, whichever is larger. // If we have no current item we have no work to do. if (curItem != null) { float extraSizeStart = 0.f; int itemIndex = curIndex - 1; ItemInfo ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; final int paddingStart = isOrientationHorizontal() ? getPaddingLeft() : getPaddingTop(); final int clientSize = isOrientationHorizontal() ? getClientWidth() : getClientHeight(); final float startSizeNeeded = clientSize <= 0 ? 0 : 2.f - curItem.sizeFactor + (float) paddingStart / (float) clientSize; for (int pos = mCurItem - 1; pos >= 0; pos--) { if (extraSizeStart >= startSizeNeeded && pos < startPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } itemIndex--; curIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeStart += ii.sizeFactor; itemIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex + 1); extraSizeStart += ii.sizeFactor; curIndex++; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } float extraSizeEnd = curItem.sizeFactor; itemIndex = curIndex + 1; if (extraSizeEnd < 2.f) { ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; final int paddingEnd = isOrientationHorizontal() ? getPaddingRight() : getPaddingBottom(); final float endSizeNeeded = clientSize <= 0 ? 0 : (float) paddingEnd / (float) clientSize + 2.f; for (int pos = mCurItem + 1; pos < N; pos++) { if (extraSizeEnd >= endSizeNeeded && pos > endPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeEnd += ii.sizeFactor; itemIndex++; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex); itemIndex++; extraSizeEnd += ii.sizeFactor; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } } calculatePageOffsets(curItem, curIndex, oldCurInfo); } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); // Check size measurement of current pages and drawing sort order. // Update LayoutParams as needed. final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.childIndex = i; if (!lp.isDecor && lp.sizeFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid // width. final ItemInfo ii = infoForChild(child); if (ii != null) { lp.sizeFactor = ii.sizeFactor; lp.position = ii.position; } } } sortChildDrawingOrder(); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(focusDirection)) { break; } } } } } }
From source file:dev.dworks.libs.widget.ViewPager.java
void populate(int newCurrentItem) { ItemInfo oldCurInfo = null;//from w ww .j av a 2 s . c om int focusDirection = View.FOCUS_FORWARD; if (mCurItem != newCurrentItem) { focusDirection = mCurItem < newCurrentItem ? mOrientation == HORIZONTAL ? View.FOCUS_RIGHT : View.FOCUS_UP : mOrientation == HORIZONTAL ? View.FOCUS_LEFT : View.FOCUS_DOWN; oldCurInfo = infoForPosition(mCurItem); mCurItem = newCurrentItem; } if (mAdapter == null) { sortChildDrawingOrder(); return; } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); sortChildDrawingOrder(); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (N != mExpectedAdapterCount) { String resName; try { resName = getResources().getResourceName(getId()); } catch (Resources.NotFoundException e) { resName = Integer.toHexString(getId()); } throw new IllegalStateException("The application's PagerAdapter changed the adapter's" + " contents without calling PagerAdapter#notifyDataSetChanged!" + " Expected adapter item count: " + mExpectedAdapterCount + ", found: " + N + " Pager id: " + resName + " Pager class: " + getClass() + " Problematic adapter: " + mAdapter.getClass()); } // Locate the currently focused item or add it if needed. int curIndex = -1; ItemInfo curItem = null; for (curIndex = 0; curIndex < mItems.size(); curIndex++) { final ItemInfo ii = mItems.get(curIndex); if (ii.position >= mCurItem) { if (ii.position == mCurItem) curItem = ii; break; } } if (curItem == null && N > 0) { curItem = addNewItem(mCurItem, curIndex); } // Fill 3x the available width or up to the number of offscreen // pages requested to either side, whichever is larger. // If we have no current item we have no work to do. if (curItem != null) { float extraFactorStart = 0.f; int itemIndex = curIndex - 1; ItemInfo ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; final int clientFactor = mOrientation == HORIZONTAL ? getClientWidth() : getClientHeight(); final float startFactorNeeded = clientFactor <= 0 ? 0 : 2.f - (mOrientation == HORIZONTAL ? curItem.widthFactor : curItem.heightFactor) + (float) (mOrientation == HORIZONTAL ? getPaddingLeft() : getPaddingTop()) / (float) clientFactor; for (int pos = mCurItem - 1; pos >= 0; pos--) { if (extraFactorStart >= startFactorNeeded && pos < startPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } itemIndex--; curIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraFactorStart += mOrientation == HORIZONTAL ? ii.widthFactor : ii.heightFactor; itemIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex + 1); extraFactorStart += mOrientation == HORIZONTAL ? ii.widthFactor : ii.heightFactor; curIndex++; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } float extraFactorEnd = mOrientation == HORIZONTAL ? curItem.widthFactor : curItem.heightFactor; itemIndex = curIndex + 1; if (extraFactorEnd < 2.f) { ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; final float endFactorNeeded = clientFactor <= 0 ? 0 : (float) (mOrientation == HORIZONTAL ? getPaddingRight() : getPaddingBottom()) / (float) clientFactor + 2.f; for (int pos = mCurItem + 1; pos < N; pos++) { if (extraFactorEnd >= endFactorNeeded && pos > endPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraFactorEnd += mOrientation == HORIZONTAL ? ii.widthFactor : ii.heightFactor; itemIndex++; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex); itemIndex++; extraFactorEnd += mOrientation == HORIZONTAL ? ii.widthFactor : ii.heightFactor; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } } calculatePageOffsets(curItem, curIndex, oldCurInfo); } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); // Check width measurement of current pages and drawing sort order. // Update LayoutParams as needed. final int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.childIndex = i; if (mOrientation == HORIZONTAL) { if (!lp.isDecor && lp.widthFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid width. final ItemInfo ii = infoForChild(child); if (ii != null) { lp.widthFactor = ii.widthFactor; lp.position = ii.position; } } } else { if (!lp.isDecor && lp.heightFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid width. final ItemInfo ii = infoForChild(child); if (ii != null) { lp.heightFactor = ii.heightFactor; lp.position = ii.position; } } } } sortChildDrawingOrder(); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(focusDirection)) { break; } } } } } }
From source file:android.improving.utils.views.cardsview.OrientedViewPager.java
void populate(int newCurrentItem) { ItemInfo oldCurInfo = null;/*from w w w . j a v a 2 s .c o m*/ int focusDirection = View.FOCUS_FORWARD; if (mCurItem != newCurrentItem) { focusDirection = mCurItem < newCurrentItem ? View.FOCUS_DOWN : View.FOCUS_UP; oldCurInfo = infoForPosition(mCurItem); mCurItem = newCurrentItem; } if (mAdapter == null) { sortChildDrawingOrder(); return; } // Bail now if we are waiting to populate. This is to hold off // on creating views from the time the user releases their finger to // fling to a new position until we have finished the scroll to // that position, avoiding glitches from happening at that point. if (mPopulatePending) { if (DEBUG) Log.i(TAG, "populate is pending, skipping for now..."); sortChildDrawingOrder(); return; } // Also, don't populate until we are attached to a window. This is to // avoid trying to populate before we have restored our view hierarchy // state and conflicting with what is restored. if (getWindowToken() == null) { return; } mAdapter.startUpdate(this); final int pageLimit = mOffscreenPageLimit; final int startPos = Math.max(0, mCurItem - pageLimit); final int N = mAdapter.getCount(); final int endPos = Math.min(N - 1, mCurItem + pageLimit); if (N != mExpectedAdapterCount) { String resName; try { resName = getResources().getResourceName(getId()); } catch (Resources.NotFoundException e) { resName = Integer.toHexString(getId()); } throw new IllegalStateException("The application's PagerAdapter changed the adapter's" + " contents without calling PagerAdapter#notifyDataSetChanged!" + " Expected adapter item count: " + mExpectedAdapterCount + ", found: " + N + " Pager id: " + resName + " Pager class: " + getClass() + " Problematic adapter: " + mAdapter.getClass()); } // Locate the currently focused item or add it if needed. int curIndex = -1; ItemInfo curItem = null; for (curIndex = 0; curIndex < mItems.size(); curIndex++) { final ItemInfo ii = mItems.get(curIndex); if (ii.position >= mCurItem) { if (ii.position == mCurItem) curItem = ii; break; } } if (curItem == null && N > 0) { curItem = addNewItem(mCurItem, curIndex); } // Fill 3x the available width or up to the number of offscreen // pages requested to either side, whichever is larger. // If we have no current item we have no work to do. if (curItem != null) { float extraSizeTopLeft = 0.f; int itemIndex = curIndex - 1; ItemInfo ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; final int clientSize = getClientSize(); final float topLeftSizeNeeded = clientSize <= 0 ? 0 : 2.f - curItem.sizeFactor + (float) getPaddingLeft() / (float) clientSize; for (int pos = mCurItem - 1; pos >= 0; pos--) { if (extraSizeTopLeft >= topLeftSizeNeeded && pos < startPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } itemIndex--; curIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeTopLeft += ii.sizeFactor; itemIndex--; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex + 1); extraSizeTopLeft += ii.sizeFactor; curIndex++; ii = itemIndex >= 0 ? mItems.get(itemIndex) : null; } } float extraSizeBottomRight = curItem.sizeFactor; itemIndex = curIndex + 1; if (extraSizeBottomRight < 2.f) { ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; final float bottomRightSizeNeeded = clientSize <= 0 ? 0 : (float) getPaddingRight() / (float) clientSize + 2.f; for (int pos = mCurItem + 1; pos < N; pos++) { if (extraSizeBottomRight >= bottomRightSizeNeeded && pos > endPos) { if (ii == null) { break; } if (pos == ii.position && !ii.scrolling) { mItems.remove(itemIndex); mAdapter.destroyItem(this, pos, ii.object); if (DEBUG) { Log.i(TAG, "populate() - destroyItem() with pos: " + pos + " view: " + ((View) ii.object)); } ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } else if (ii != null && pos == ii.position) { extraSizeBottomRight += ii.sizeFactor; itemIndex++; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } else { ii = addNewItem(pos, itemIndex); itemIndex++; extraSizeBottomRight += ii.sizeFactor; ii = itemIndex < mItems.size() ? mItems.get(itemIndex) : null; } } } calculatePageOffsets(curItem, curIndex, oldCurInfo); } if (DEBUG) { Log.i(TAG, "Current page list:"); for (int i = 0; i < mItems.size(); i++) { Log.i(TAG, "#" + i + ": page " + mItems.get(i).position); } } mAdapter.setPrimaryItem(this, mCurItem, curItem != null ? curItem.object : null); mAdapter.finishUpdate(this); // Check width measurement of current pages and drawing sort order. // Update LayoutParams as needed. final int childCount = getChildCount(); if (mOrientation == Orientation.VERTICAL) { for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.childIndex = i; if (!lp.isDecor && lp.heightFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid width // . final ItemInfo ii = infoForChild(child); if (ii != null) { lp.heightFactor = ii.sizeFactor; lp.position = ii.position; } } } } else { for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); final LayoutParams lp = (LayoutParams) child.getLayoutParams(); lp.childIndex = i; if (!lp.isDecor && lp.widthFactor == 0.f) { // 0 means requery the adapter for this, it doesn't have a valid width. final ItemInfo ii = infoForChild(child); if (ii != null) { lp.widthFactor = ii.sizeFactor; lp.position = ii.position; } } } } sortChildDrawingOrder(); if (hasFocus()) { View currentFocused = findFocus(); ItemInfo ii = currentFocused != null ? infoForAnyChild(currentFocused) : null; if (ii == null || ii.position != mCurItem) { for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); ii = infoForChild(child); if (ii != null && ii.position == mCurItem) { if (child.requestFocus(focusDirection)) { break; } } } } } }
From source file:org.bangbang.support.v4.widget.HListView.java
/** * Do an arrow scroll based on focus searching. If a new view is * given focus, return the selection delta and amount to scroll via * an {@link ArrowScrollFocusResult}, otherwise, return null. *//w w w . jav a 2 s. c o m * @param direction either {@link android.view.View#FOCUS_UP} or * {@link android.view.View#FOCUS_DOWN}. * @return The result if focus has changed, or <code>null</code>. */ private ArrowScrollFocusResult arrowScrollFocused(final int direction) { final View selectedView = getSelectedView(); View newFocus; if (selectedView != null && selectedView.hasFocus()) { View oldFocus = selectedView.findFocus(); newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); } else { if (direction == View.FOCUS_LEFT) { final boolean topFadingEdgeShowing = (mFirstPosition > 0); final int listLeft = mListPadding.top + (topFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int ySearchPoint = (selectedView != null && selectedView.getLeft() > listLeft) ? selectedView.getLeft() : listLeft; mTempRect.set(0, ySearchPoint, 0, ySearchPoint); } else { final boolean bottomFadingEdgeShowing = (mFirstPosition + getChildCount() - 1) < mItemCount; final int listRight = getWidth() - mListPadding.right - (bottomFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int ySearchPoint = (selectedView != null && selectedView.getRight() < listRight) ? selectedView.getRight() : listRight; mTempRect.set(0, ySearchPoint, 0, ySearchPoint); } newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); } if (newFocus != null) { final int positionOfNewFocus = positionOfNewFocus(newFocus); // if the focus change is in a different new position, make sure // we aren't jumping over another selectable position if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { final int selectablePosition = lookForSelectablePositionOnScreen(direction); if (selectablePosition != INVALID_POSITION && ((direction == View.FOCUS_DOWN && selectablePosition < positionOfNewFocus) || (direction == View.FOCUS_UP && selectablePosition > positionOfNewFocus))) { return null; } } int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); final int maxScrollAmount = getMaxScrollAmount(); if (focusScroll < maxScrollAmount) { // not moving too far, safe to give next view focus newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); return mArrowScrollFocusResult; } else if (distanceToView(newFocus) < maxScrollAmount) { // Case to consider: // too far to get entire next focusable on screen, but by going // max scroll amount, we are getting it at least partially in view, // so give it focus and scroll the max ammount. newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); return mArrowScrollFocusResult; } } return null; }
From source file:com.appunite.list.HorizontalListView.java
/** * Do an arrow scroll based on focus searching. If a new view is * given focus, return the selection delta and amount to scroll via * an {@link ArrowScrollFocusResult}, otherwise, return null. * * @param direction either {@link android.view.View#FOCUS_UP} or * {@link android.view.View#FOCUS_DOWN}. * @return The result if focus has changed, or <code>null</code>. *///from w ww .ja va2 s . c om private ArrowScrollFocusResult arrowScrollFocused(final int direction) { final View selectedView = getSelectedView(); View newFocus; if (selectedView != null && selectedView.hasFocus()) { View oldFocus = selectedView.findFocus(); newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); } else { if (direction == View.FOCUS_RIGHT) { final boolean topFadingEdgeShowing = (mFirstPosition > 0); final int listLeft = mListPadding.left + (topFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int xSearchPoint = (selectedView != null && selectedView.getLeft() > listLeft) ? selectedView.getLeft() : listLeft; mTempRect.set(xSearchPoint, 0, xSearchPoint, 0); } else { final boolean rightFadingEdgeShowing = (mFirstPosition + getChildCount() - 1) < mItemCount; final int listRight = getWidth() - mListPadding.right - (rightFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int xSearchPoint = (selectedView != null && selectedView.getRight() < listRight) ? selectedView.getRight() : listRight; mTempRect.set(xSearchPoint, 0, xSearchPoint, 0); } newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); } if (newFocus != null) { final int positionOfNewFocus = positionOfNewFocus(newFocus); // if the focus change is in a different new position, make sure // we aren't jumping over another selectable position if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { final int selectablePosition = lookForSelectablePositionOnScreen(direction); if (selectablePosition != INVALID_POSITION && ((direction == View.FOCUS_RIGHT && selectablePosition < positionOfNewFocus) || (direction == View.FOCUS_LEFT && selectablePosition > positionOfNewFocus))) { return null; } } int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); final int maxScrollAmount = getMaxScrollAmount(); if (focusScroll < maxScrollAmount) { // not moving too far, safe to give next view focus newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); return mArrowScrollFocusResult; } else if (distanceToView(newFocus) < maxScrollAmount) { // Case to consider: // too far to get entire next focusable on screen, but by going // max scroll amount, we are getting it at least partially in view, // so give it focus and scroll the max ammount. newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); return mArrowScrollFocusResult; } } return null; }
From source file:com.appunite.list.ListView.java
/** * Do an arrow scroll based on focus searching. If a new view is * given focus, return the selection delta and amount to scroll via * an {@link ArrowScrollFocusResult}, otherwise, return null. * * @param direction either {@link android.view.View#FOCUS_UP} or * {@link android.view.View#FOCUS_DOWN}. * @return The result if focus has changed, or <code>null</code>. *///from ww w.ja va2 s . c o m private ArrowScrollFocusResult arrowScrollFocused(final int direction) { final View selectedView = getSelectedView(); View newFocus; if (selectedView != null && selectedView.hasFocus()) { View oldFocus = selectedView.findFocus(); newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); } else { if (direction == View.FOCUS_DOWN) { final boolean topFadingEdgeShowing = (mFirstPosition > 0); final int listTop = mListPadding.top + (topFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int ySearchPoint = (selectedView != null && selectedView.getTop() > listTop) ? selectedView.getTop() : listTop; mTempRect.set(0, ySearchPoint, 0, ySearchPoint); } else { final boolean bottomFadingEdgeShowing = (mFirstPosition + getChildCount() - 1) < mItemCount; final int listBottom = getHeight() - mListPadding.bottom - (bottomFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int ySearchPoint = (selectedView != null && selectedView.getBottom() < listBottom) ? selectedView.getBottom() : listBottom; mTempRect.set(0, ySearchPoint, 0, ySearchPoint); } newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); } if (newFocus != null) { final int positionOfNewFocus = positionOfNewFocus(newFocus); // if the focus change is in a different new position, make sure // we aren't jumping over another selectable position if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { final int selectablePosition = lookForSelectablePositionOnScreen(direction); if (selectablePosition != INVALID_POSITION && ((direction == View.FOCUS_DOWN && selectablePosition < positionOfNewFocus) || (direction == View.FOCUS_UP && selectablePosition > positionOfNewFocus))) { return null; } } int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); final int maxScrollAmount = getMaxScrollAmount(); if (focusScroll < maxScrollAmount) { // not moving too far, safe to give next view focus newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); return mArrowScrollFocusResult; } else if (distanceToView(newFocus) < maxScrollAmount) { // Case to consider: // too far to get entire next focusable on screen, but by going // max scroll amount, we are getting it at least partially in view, // so give it focus and scroll the max ammount. newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); return mArrowScrollFocusResult; } } return null; }
From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java
/** * Do an arrow scroll based on focus searching. If a new view is given focus, return the selection delta and amount to scroll via * an {@link ArrowScrollFocusResult}, otherwise, return null. * // www .j av a 2s .c o m * @param direction * either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. * @return The result if focus has changed, or <code>null</code>. */ private ArrowScrollFocusResult arrowScrollFocused(final int direction) { final View selectedView = getSelectedView(); View newFocus; if (selectedView != null && selectedView.hasFocus()) { View oldFocus = selectedView.findFocus(); newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); } else { if (direction == View.FOCUS_DOWN) { final boolean leftFadingEdgeShowing = (mFirstPosition > 0); final int listLeft = mListPadding.left + (leftFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int xSearchPoint = (selectedView != null && selectedView.getLeft() > listLeft) ? selectedView.getLeft() : listLeft; mTempRect.set(xSearchPoint, 0, xSearchPoint, 0); } else { final boolean rightFadingEdgeShowing = (mFirstPosition + getChildCount() - 1) < mItemCount; final int listRight = getWidth() - mListPadding.right - (rightFadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int xSearchPoint = (selectedView != null && selectedView.getRight() < listRight) ? selectedView.getRight() : listRight; mTempRect.set(xSearchPoint, 0, xSearchPoint, 0); } newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); } if (newFocus != null) { final int positionOfNewFocus = positionOfNewFocus(newFocus); // if the focus change is in a different new position, make sure // we aren't jumping over another selectable position if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { final int selectablePosition = lookForSelectablePositionOnScreen(direction); if (selectablePosition != INVALID_POSITION && ((direction == View.FOCUS_DOWN && selectablePosition < positionOfNewFocus) || (direction == View.FOCUS_UP && selectablePosition > positionOfNewFocus))) { return null; } } int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); final int maxScrollAmount = getMaxScrollAmount(); if (focusScroll < maxScrollAmount) { // not moving too far, safe to give next view focus newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); return mArrowScrollFocusResult; } else if (distanceToView(newFocus) < maxScrollAmount) { // Case to consider: // too far to get entire next focusable on screen, but by going // max scroll amount, we are getting it at least partially in view, // so give it focus and scroll the max ammount. newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); return mArrowScrollFocusResult; } } return null; }
From source file:com.boutline.sports.helpers.TwoWayView.java
/** * Do an arrow scroll based on focus searching. If a new view is * given focus, return the selection delta and amount to scroll via * an {@link ArrowScrollFocusResult}, otherwise, return null. * * @param direction either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN} or * {@link android.view.View#FOCUS_LEFT} or {@link android.view.View#FOCUS_RIGHT} depending on the * current view orientation.//from ww w.j a va 2s . c om * * @return The result if focus has changed, or <code>null</code>. */ private ArrowScrollFocusResult arrowScrollFocused(final int direction) { forceValidFocusDirection(direction); final View selectedView = getSelectedView(); final View newFocus; final int searchPoint; if (selectedView != null && selectedView.hasFocus()) { View oldFocus = selectedView.findFocus(); newFocus = FocusFinder.getInstance().findNextFocus(this, oldFocus, direction); } else { if (direction == View.FOCUS_DOWN || direction == View.FOCUS_RIGHT) { final int start = getStartEdge(); final int selectedStart; if (selectedView != null) { selectedStart = (mIsVertical ? selectedView.getTop() : selectedView.getLeft()); } else { selectedStart = start; } searchPoint = Math.max(selectedStart, start); } else { final int end = getEndEdge(); final int selectedEnd; if (selectedView != null) { selectedEnd = getChildEndEdge(selectedView); } else { selectedEnd = end; } searchPoint = Math.min(selectedEnd, end); } final int x = (mIsVertical ? 0 : searchPoint); final int y = (mIsVertical ? searchPoint : 0); mTempRect.set(x, y, x, y); newFocus = FocusFinder.getInstance().findNextFocusFromRect(this, mTempRect, direction); } if (newFocus != null) { final int positionOfNewFocus = positionOfNewFocus(newFocus); // If the focus change is in a different new position, make sure // we aren't jumping over another selectable position. if (mSelectedPosition != INVALID_POSITION && positionOfNewFocus != mSelectedPosition) { final int selectablePosition = lookForSelectablePositionOnScreen(direction); final boolean movingForward = (direction == View.FOCUS_DOWN || direction == View.FOCUS_RIGHT); final boolean movingBackward = (direction == View.FOCUS_UP || direction == View.FOCUS_LEFT); if (selectablePosition != INVALID_POSITION && ((movingForward && selectablePosition < positionOfNewFocus) || (movingBackward && selectablePosition > positionOfNewFocus))) { return null; } } int focusScroll = amountToScrollToNewFocus(direction, newFocus, positionOfNewFocus); final int maxScrollAmount = getMaxScrollAmount(); if (focusScroll < maxScrollAmount) { // Not moving too far, safe to give next view focus newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, focusScroll); return mArrowScrollFocusResult; } else if (distanceToView(newFocus) < maxScrollAmount) { // Case to consider: // Too far to get entire next focusable on screen, but by going // max scroll amount, we are getting it at least partially in view, // so give it focus and scroll the max amount. newFocus.requestFocus(direction); mArrowScrollFocusResult.populate(positionOfNewFocus, maxScrollAmount); return mArrowScrollFocusResult; } } return null; }