List of usage examples for android.view View FOCUS_LEFT
int FOCUS_LEFT
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From source file:com.hippo.widget.BothScrollView.java
/** * When looking for focus in children of a scroll view, need to be a little * more careful not to give focus to something that is scrolled off screen. * * This is more expensive than the default {@link android.view.ViewGroup} * implementation, otherwise this behavior might have been made the default. *//*from w w w . j a v a2s .com*/ @Override protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { // convert from forward / backward notation to up / down / left / right // (ugh). if (direction == View.FOCUS_FORWARD) { direction = View.FOCUS_RIGHT; } else if (direction == View.FOCUS_BACKWARD) { direction = View.FOCUS_LEFT; } final View nextFocus = previouslyFocusedRect == null ? FocusFinder.getInstance().findNextFocus(this, null, direction) : FocusFinder.getInstance().findNextFocusFromRect(this, previouslyFocusedRect, direction); if (nextFocus == null) { return false; } if (isOffScreen(nextFocus)) { return false; } return nextFocus.requestFocus(direction, previouslyFocusedRect); }
From source file:com.aliasapps.seq.scroller.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 View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending on the * current view orientation.//from w ww.ja v a2 s . com * * @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 = (mIsVertical ? getPaddingTop() : getPaddingLeft()); final int selectedStart; if (selectedView != null) { selectedStart = (mIsVertical ? selectedView.getTop() : selectedView.getLeft()); } else { selectedStart = start; } searchPoint = Math.max(selectedStart, start); } else { final int end = (mIsVertical ? getHeight() - getPaddingBottom() : getWidth() - getPaddingRight()); final int selectedEnd; if (selectedView != null) { selectedEnd = (mIsVertical ? selectedView.getBottom() : selectedView.getRight()); } 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; }
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 w w w.j av a 2 s . c o m * * @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; }
From source file:com.artifex.mupdf.view.ThumbnailViews.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 a2 s .com*/ * @param direction * either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending * on the current view orientation. * * @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 = (mIsVertical ? getPaddingTop() : getPaddingLeft()); final int selectedStart; if (selectedView != null) { selectedStart = (mIsVertical ? selectedView.getTop() : selectedView.getLeft()); } else { selectedStart = start; } searchPoint = Math.max(selectedStart, start); } else { final int end = (mIsVertical ? getHeight() - getPaddingBottom() : getWidth() - getPaddingRight()); final int selectedEnd; if (selectedView != null) { selectedEnd = (mIsVertical ? selectedView.getBottom() : selectedView.getRight()); } 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; }
From source file:com.artifex.mupdflib.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 View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending on the * current view orientation.//from w w w . j a v a 2 s. c o m * * @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) { boolean fadingEdgeShowing = (mFirstPosition > 0); final int start = getStartEdge() + (fadingEdgeShowing ? getArrowScrollPreviewLength() : 0); final int selectedStart; if (selectedView != null) { selectedStart = getChildStartEdge(selectedView); } else { selectedStart = start; } searchPoint = Math.max(selectedStart, start); } else { final boolean fadingEdgeShowing = (mFirstPosition + getChildCount() - 1) < mItemCount; final int end = getEndEdge() - (fadingEdgeShowing ? getArrowScrollPreviewLength() : 0); 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; }
From source file:com.aliasapps.seq.scroller.TwoWayView.java
/** * Handle an arrow scroll going up or down. Take into account whether items are selectable, * whether there are focusable items, etc. * * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending on the * current view orientation./* ww w. j a va 2s. co m*/ * * @return Whether any scrolling, selection or focus change occurred. */ private boolean arrowScrollImpl(int direction) { forceValidFocusDirection(direction); if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // If we are moving focus, we may OVERRIDE the default behaviour final ArrowScrollFocusResult focusResult = (mItemsCanFocus ? arrowScrollFocused(direction) : null); if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = (focusResult != null); if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // There was no new view found to take focus, make sure we // don't leave focus with the old selection. final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy( direction == View.FOCUS_UP || direction == View.FOCUS_LEFT ? amountToScroll : -amountToScroll); needToRedraw = true; } // If we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && focusResult == null && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // If the current selection is panned off, we need to remove the selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // But we don't want to set the ressurect position (that would make subsequent // unhandled key events bring back the item we just scrolled off) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedStart = selectedView.getTop(); } if (!awakenScrollbarsInternal()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.kinth.mmspeed.ui.TwoWayView.java
/** * Handle an arrow scroll going up or down. Take into account whether items * are selectable, whether there are focusable items, etc. * //from ww w .j av a 2 s. c om * @param direction * either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending * on the current view orientation. * * @return Whether any scrolling, selection or focus change occurred. */ private boolean arrowScrollImpl(int direction) { forceValidFocusDirection(direction); if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // If we are moving focus, we may OVERRIDE the default behaviour final ArrowScrollFocusResult focusResult = (mItemsCanFocus ? arrowScrollFocused(direction) : null); if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = (focusResult != null); if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // There was no new view found to take focus, make sure we // don't leave focus with the old selection. final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy( direction == View.FOCUS_UP || direction == View.FOCUS_LEFT ? amountToScroll : -amountToScroll); needToRedraw = true; } // If we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && focusResult == null && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // If the current selection is panned off, we need to remove the // selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // But we don't want to set the ressurect position (that would make // subsequent // unhandled key events bring back the item we just scrolled off) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedStart = selectedView.getTop(); } if (!awakenScrollbarsInternal()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.artifex.mupdf.view.ThumbnailViews.java
/** * Handle an arrow scroll going up or down. Take into account whether items * are selectable, whether there are focusable items, etc. * //from w ww. ja v a 2 s . c om * @param direction * either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending * on the current view orientation. * * @return Whether any scrolling, selection or focus change occurred. */ private boolean arrowScrollImpl(int direction) { forceValidFocusDirection(direction); if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // If we are moving focus, we may OVERRIDE the default behaviour final ArrowScrollFocusResult focusResult = (mItemsCanFocus ? arrowScrollFocused(direction) : null); if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = (focusResult != null); if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // There was no new view found to take focus, make sure we // don't leave focus with the old selection. final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { trackMotionScroll( direction == View.FOCUS_UP || direction == View.FOCUS_LEFT ? amountToScroll : -amountToScroll); needToRedraw = true; } // If we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && focusResult == null && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // If the current selection is panned off, we need to remove the // selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // But we don't want to set the ressurect position (that would make // subsequent // unhandled key events bring back the item we just scrolled off) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedStart = selectedView.getTop(); } if (!awakenScrollbarsInternal()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.artifex.mupdflib.TwoWayView.java
/** * Handle an arrow scroll going up or down. Take into account whether items are selectable, * whether there are focusable items, etc. * * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} or * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending on the * current view orientation.//from w w w .java 2 s .c o m * * @return Whether any scrolling, selection or focus change occurred. */ private boolean arrowScrollImpl(int direction) { forceValidFocusDirection(direction); if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // If we are moving focus, we may OVERRIDE the default behaviour final ArrowScrollFocusResult focusResult = (mItemsCanFocus ? arrowScrollFocused(direction) : null); if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = (focusResult != null); if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // There was no new view found to take focus, make sure we // don't leave focus with the old selection. final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy( direction == View.FOCUS_UP || direction == View.FOCUS_LEFT ? amountToScroll : -amountToScroll); needToRedraw = true; } // If we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && focusResult == null && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // If the current selection is panned off, we need to remove the selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // But we don't want to set the ressurect position (that would make subsequent // unhandled key events bring back the item we just scrolled off) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedStart = getChildStartEdge(selectedView); } if (!awakenScrollbarsInternal()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.appunite.list.ListView.java
private boolean commonKey(int keyCode, int count, KeyEvent event) { if (mAdapter == null || !mIsAttached) { return false; }/* w w w.ja v a 2 s . c om*/ if (mDataChanged) { layoutChildren(); } boolean handled = false; int action = event.getAction(); if (action != KeyEvent.ACTION_UP) { switch (keyCode) { case KeyEvent.KEYCODE_DPAD_UP: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded(); if (!handled) { while (count-- > 0) { if (arrowScroll(FOCUS_UP)) { handled = true; } else { break; } } } } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_ALT_ON)) { handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); } break; case KeyEvent.KEYCODE_DPAD_DOWN: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded(); if (!handled) { while (count-- > 0) { if (arrowScroll(FOCUS_DOWN)) { handled = true; } else { break; } } } } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_ALT_ON)) { handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); } break; case KeyEvent.KEYCODE_DPAD_LEFT: if (KeyEventCompat.hasNoModifiers(event)) { handled = handleHorizontalFocusWithinListItem(View.FOCUS_LEFT); } break; case KeyEvent.KEYCODE_DPAD_RIGHT: if (KeyEventCompat.hasNoModifiers(event)) { handled = handleHorizontalFocusWithinListItem(View.FOCUS_RIGHT); } break; case KeyEvent.KEYCODE_DPAD_CENTER: case KeyEvent.KEYCODE_ENTER: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded(); if (!handled && event.getRepeatCount() == 0 && getChildCount() > 0) { keyPressed(); handled = true; } } break; case KeyEvent.KEYCODE_SPACE: if (mPopup == null || !mPopup.isShowing()) { if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_DOWN); } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) { handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_UP); } handled = true; } break; case KeyEvent.KEYCODE_PAGE_UP: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_UP); } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_ALT_ON)) { handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); } break; case KeyEvent.KEYCODE_PAGE_DOWN: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded() || pageScroll(FOCUS_DOWN); } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_ALT_ON)) { handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); } break; case KeyEvent.KEYCODE_MOVE_HOME: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_UP); } break; case KeyEvent.KEYCODE_MOVE_END: if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded() || fullScroll(FOCUS_DOWN); } break; case KeyEvent.KEYCODE_TAB: // XXX Sometimes it is useful to be able to TAB through the items in // a ListView sequentially. Unfortunately this can create an // asymmetry in TAB navigation order unless the list selection // always reverts to the top or bottom when receiving TAB focus from // another widget. Leaving this behavior disabled for now but // perhaps it should be configurable (and more comprehensive). if (false) { if (KeyEventCompat.hasNoModifiers(event)) { handled = resurrectSelectionIfNeeded() || arrowScroll(FOCUS_DOWN); } else if (KeyEventCompat.hasModifiers(event, KeyEvent.META_SHIFT_ON)) { handled = resurrectSelectionIfNeeded() || arrowScroll(FOCUS_UP); } } break; } } if (handled) { return true; } if (sendToTextFilter(keyCode, count, event)) { return true; } switch (action) { case KeyEvent.ACTION_DOWN: return super.onKeyDown(keyCode, event); case KeyEvent.ACTION_UP: return super.onKeyUp(keyCode, event); case KeyEvent.ACTION_MULTIPLE: return super.onKeyMultiple(keyCode, count, event); default: // shouldn't happen return false; } }