Fixing focus issues in Launcher (keyboard support).
Change-Id: Ieafd713393daf5628f229a66441bd3ed293245da
diff --git a/src/com/android/launcher2/FocusHelper.java b/src/com/android/launcher2/FocusHelper.java
new file mode 100644
index 0000000..c9bd58c
--- /dev/null
+++ b/src/com/android/launcher2/FocusHelper.java
@@ -0,0 +1,772 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher2;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+import android.widget.TabHost;
+import android.widget.TabWidget;
+
+import com.android.launcher.R;
+
+/**
+ * A keyboard listener we set on all the button bar buttons.
+ */
+class ButtonBarKeyEventListener implements View.OnKeyListener {
+ @Override
+ public boolean onKey(View v, int keyCode, KeyEvent event) {
+ return FocusHelper.handleButtonBarButtonKeyEvent(v, keyCode, event);
+ }
+}
+
+/**
+ * A keyboard listener we set on the last tab button in AllApps to jump to then
+ * market icon and vice versa.
+ */
+class AllAppsTabKeyEventListener implements View.OnKeyListener {
+ @Override
+ public boolean onKey(View v, int keyCode, KeyEvent event) {
+ return FocusHelper.handleAllAppsTabKeyEvent(v, keyCode, event);
+ }
+}
+
+public class FocusHelper {
+ /**
+ * Private helper to get the parent TabHost in the view hiearchy.
+ */
+ private static TabHost findTabHostParent(View v) {
+ ViewParent p = v.getParent();
+ while (p != null && !(p instanceof TabHost)) {
+ p = p.getParent();
+ }
+ return (TabHost) p;
+ }
+
+ /**
+ * Handles key events in a AllApps tab between the last tab view and the shop button.
+ */
+ static boolean handleAllAppsTabKeyEvent(View v, int keyCode, KeyEvent e) {
+ final TabHost tabHost = findTabHostParent(v);
+ final ViewGroup contents = (ViewGroup)
+ tabHost.findViewById(com.android.internal.R.id.tabcontent);
+ final View shop = tabHost.findViewById(R.id.market_button);
+
+ final int action = e.getAction();
+ final boolean handleKeyEvent = (action != KeyEvent.ACTION_UP);
+ boolean wasHandled = false;
+ switch (keyCode) {
+ case KeyEvent.KEYCODE_DPAD_RIGHT:
+ if (handleKeyEvent) {
+ // Select the shop button if we aren't on it
+ if (v != shop) {
+ shop.requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_DOWN:
+ if (handleKeyEvent) {
+ // Select the content view (down is handled by the tab key handler otherwise)
+ if (v == shop) {
+ contents.requestFocus();
+ wasHandled = true;
+ }
+ }
+ break;
+ default: break;
+ }
+ return wasHandled;
+ }
+
+ /**
+ * Private helper to determine whether a view is visible.
+ */
+ private static boolean isVisible(View v) {
+ return v.getVisibility() == View.VISIBLE;
+ }
+
+ /**
+ * Handles key events in a PageViewExtendedLayout containing PagedViewWidgets.
+ */
+ static boolean handlePagedViewWidgetKeyEvent(PagedViewWidget w, int keyCode, KeyEvent e) {
+ if (!LauncherApplication.isScreenXLarge()) return false;
+
+ final PagedViewExtendedLayout parent = (PagedViewExtendedLayout) w.getParent();
+ final ViewGroup container = (ViewGroup) parent.getParent();
+ final TabHost tabHost = findTabHostParent(container);
+ final TabWidget tabs = (TabWidget) tabHost.findViewById(com.android.internal.R.id.tabs);
+ final int widgetIndex = parent.indexOfChild(w);
+ final int widgetCount = parent.getChildCount();
+ final int pageIndex = container.indexOfChild(parent);
+ final int pageCount = container.getChildCount();
+
+ final int action = e.getAction();
+ final boolean handleKeyEvent = (action != KeyEvent.ACTION_UP);
+ PagedViewExtendedLayout newParent = null;
+ boolean wasHandled = false;
+ switch (keyCode) {
+ case KeyEvent.KEYCODE_DPAD_LEFT:
+ if (handleKeyEvent) {
+ // Select the previous widget or the last widget on the previous page
+ if (widgetIndex > 0) {
+ parent.getChildAt(widgetIndex - 1).requestFocus();
+ } else {
+ if (pageIndex > 0) {
+ newParent = (PagedViewExtendedLayout)
+ container.getChildAt(pageIndex - 1);
+ newParent.getChildAt(newParent.getChildCount() - 1).requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_RIGHT:
+ if (handleKeyEvent) {
+ // Select the next widget or the first widget on the next page
+ if (widgetIndex < (widgetCount - 1)) {
+ parent.getChildAt(widgetIndex + 1).requestFocus();
+ } else {
+ if (pageIndex < (pageCount - 1)) {
+ newParent = (PagedViewExtendedLayout)
+ container.getChildAt(pageIndex + 1);
+ newParent.getChildAt(0).requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_UP:
+ if (handleKeyEvent) {
+ // Select widgets tab on the tab bar
+ tabs.requestFocus();
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_DOWN:
+ if (handleKeyEvent) {
+ // TODO: Should focus the global search bar
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_ENTER:
+ case KeyEvent.KEYCODE_DPAD_CENTER:
+ if (handleKeyEvent) {
+ // Simulate a click on the widget
+ View.OnClickListener clickListener = (View.OnClickListener) container;
+ clickListener.onClick(w);
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_PAGE_UP:
+ if (handleKeyEvent) {
+ // Select the first item on the previous page, or the first item on this page
+ // if there is no previous page
+ if (pageIndex > 0) {
+ newParent = (PagedViewExtendedLayout) container.getChildAt(pageIndex - 1);
+ newParent.getChildAt(0).requestFocus();
+ } else {
+ parent.getChildAt(0).requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_PAGE_DOWN:
+ if (handleKeyEvent) {
+ // Select the first item on the next page, or the last item on this page
+ // if there is no next page
+ if (pageIndex < (pageCount - 1)) {
+ newParent = (PagedViewExtendedLayout) container.getChildAt(pageIndex + 1);
+ newParent.getChildAt(0).requestFocus();
+ } else {
+ parent.getChildAt(widgetCount - 1).requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_MOVE_HOME:
+ if (handleKeyEvent) {
+ // Select the first item on this page
+ parent.getChildAt(0).requestFocus();
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_MOVE_END:
+ if (handleKeyEvent) {
+ // Select the last item on this page
+ parent.getChildAt(widgetCount - 1).requestFocus();
+ }
+ wasHandled = true;
+ break;
+ default: break;
+ }
+ return wasHandled;
+ }
+
+ /**
+ * Private helper method to get the PagedViewCellLayoutChildren given a PagedViewCellLayout
+ * index.
+ */
+ private static PagedViewCellLayoutChildren getPagedViewCellLayoutChildrenForIndex(
+ ViewGroup container, int i) {
+ ViewGroup parent = (ViewGroup) container.getChildAt(i);
+ return (PagedViewCellLayoutChildren) parent.getChildAt(0);
+ }
+
+ /**
+ * Handles key events in a PageViewCellLayout containing PagedViewIcons.
+ */
+ static boolean handlePagedViewIconKeyEvent(PagedViewIcon v, int keyCode, KeyEvent e) {
+ if (!LauncherApplication.isScreenXLarge()) return false;
+
+ final PagedViewCellLayoutChildren parent = (PagedViewCellLayoutChildren) v.getParent();
+ final PagedViewCellLayout parentLayout = (PagedViewCellLayout) parent.getParent();
+ // Note we have an extra parent because of the
+ // PagedViewCellLayout/PagedViewCellLayoutChildren relationship
+ final ViewGroup container = (ViewGroup) parentLayout.getParent();
+ final TabHost tabHost = findTabHostParent(container);
+ final TabWidget tabs = (TabWidget) tabHost.findViewById(com.android.internal.R.id.tabs);
+ final int widgetIndex = parent.indexOfChild(v);
+ final int widgetCount = parent.getChildCount();
+ final int pageIndex = container.indexOfChild(parentLayout);
+ final int pageCount = container.getChildCount();
+ final int cellCountX = parentLayout.getCellCountX();
+ final int cellCountY = parentLayout.getCellCountY();
+ final int x = widgetIndex % cellCountX;
+ final int y = widgetIndex / cellCountX;
+
+ final int action = e.getAction();
+ final boolean handleKeyEvent = (action != KeyEvent.ACTION_UP);
+ PagedViewCellLayoutChildren newParent = null;
+ boolean wasHandled = false;
+ switch (keyCode) {
+ case KeyEvent.KEYCODE_DPAD_LEFT:
+ if (handleKeyEvent) {
+ // Select the previous icon or the last icon on the previous page
+ if (widgetIndex > 0) {
+ parent.getChildAt(widgetIndex - 1).requestFocus();
+ } else {
+ if (pageIndex > 0) {
+ newParent = getPagedViewCellLayoutChildrenForIndex(container,
+ pageIndex - 1);
+ newParent.getChildAt(newParent.getChildCount() - 1).requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_RIGHT:
+ if (handleKeyEvent) {
+ // Select the next icon or the first icon on the next page
+ if (widgetIndex < (widgetCount - 1)) {
+ parent.getChildAt(widgetIndex + 1).requestFocus();
+ } else {
+ if (pageIndex < (pageCount - 1)) {
+ newParent = getPagedViewCellLayoutChildrenForIndex(container,
+ pageIndex + 1);
+ newParent.getChildAt(0).requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_UP:
+ if (handleKeyEvent) {
+ // Select the closest icon in the previous row, otherwise select the tab bar
+ if (y > 0) {
+ int newWidgetIndex = ((y - 1) * cellCountX) + x;
+ parent.getChildAt(newWidgetIndex).requestFocus();
+ } else {
+ tabs.requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_DOWN:
+ if (handleKeyEvent) {
+ // Select the closest icon in the previous row, otherwise do nothing
+ if (y < (cellCountY - 1)) {
+ int newWidgetIndex = Math.min(widgetCount - 1, ((y + 1) * cellCountX) + x);
+ parent.getChildAt(newWidgetIndex).requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_ENTER:
+ case KeyEvent.KEYCODE_DPAD_CENTER:
+ if (handleKeyEvent) {
+ // Simulate a click on the icon
+ View.OnClickListener clickListener = (View.OnClickListener) container;
+ clickListener.onClick(v);
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_PAGE_UP:
+ if (handleKeyEvent) {
+ // Select the first icon on the previous page, or the first icon on this page
+ // if there is no previous page
+ if (pageIndex > 0) {
+ newParent = getPagedViewCellLayoutChildrenForIndex(container,
+ pageIndex - 1);
+ newParent.getChildAt(0).requestFocus();
+ } else {
+ parent.getChildAt(0).requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_PAGE_DOWN:
+ if (handleKeyEvent) {
+ // Select the first icon on the next page, or the last icon on this page
+ // if there is no next page
+ if (pageIndex < (pageCount - 1)) {
+ newParent = getPagedViewCellLayoutChildrenForIndex(container,
+ pageIndex + 1);
+ newParent.getChildAt(0).requestFocus();
+ } else {
+ parent.getChildAt(widgetCount - 1).requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_MOVE_HOME:
+ if (handleKeyEvent) {
+ // Select the first icon on this page
+ parent.getChildAt(0).requestFocus();
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_MOVE_END:
+ if (handleKeyEvent) {
+ // Select the last icon on this page
+ parent.getChildAt(widgetCount - 1).requestFocus();
+ }
+ wasHandled = true;
+ break;
+ default: break;
+ }
+ return wasHandled;
+ }
+
+ /**
+ * Handles key events in the tab widget.
+ */
+ static boolean handleTabKeyEvent(AccessibleTabView v, int keyCode, KeyEvent e) {
+ if (!LauncherApplication.isScreenXLarge()) return false;
+
+ final FocusOnlyTabWidget parent = (FocusOnlyTabWidget) v.getParent();
+ final TabHost tabHost = findTabHostParent(parent);
+ final ViewGroup contents = (ViewGroup)
+ tabHost.findViewById(com.android.internal.R.id.tabcontent);
+ final int tabCount = parent.getTabCount();
+ final int tabIndex = parent.getChildTabIndex(v);
+
+ final int action = e.getAction();
+ final boolean handleKeyEvent = (action != KeyEvent.ACTION_UP);
+ boolean wasHandled = false;
+ switch (keyCode) {
+ case KeyEvent.KEYCODE_DPAD_LEFT:
+ if (handleKeyEvent) {
+ // Select the previous tab
+ if (tabIndex > 0) {
+ parent.getChildTabViewAt(tabIndex - 1).requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_RIGHT:
+ if (handleKeyEvent) {
+ // Select the next tab, or if the last tab has a focus right id, select that
+ if (tabIndex < (tabCount - 1)) {
+ parent.getChildTabViewAt(tabIndex + 1).requestFocus();
+ } else {
+ if (v.getNextFocusRightId() != View.NO_ID) {
+ tabHost.findViewById(v.getNextFocusRightId()).requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_UP:
+ // Do nothing
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_DOWN:
+ if (handleKeyEvent) {
+ // Select the content view
+ contents.requestFocus();
+ }
+ wasHandled = true;
+ break;
+ default: break;
+ }
+ return wasHandled;
+ }
+
+ /**
+ * Handles key events in a the workspace button bar.
+ */
+ static boolean handleButtonBarButtonKeyEvent(View v, int keyCode, KeyEvent e) {
+ if (!LauncherApplication.isScreenXLarge()) return false;
+
+ final ViewGroup parent = (ViewGroup) v.getParent();
+ final ViewGroup launcher = (ViewGroup) parent.getParent();
+ final Workspace workspace = (Workspace) launcher.findViewById(R.id.workspace);
+ final int buttonIndex = parent.indexOfChild(v);
+ final int buttonCount = parent.getChildCount();
+ final int pageIndex = workspace.getCurrentPage();
+ final int pageCount = workspace.getChildCount();
+ final int firstButtonIndex = parent.indexOfChild(parent.findViewById(R.id.search_button));
+ final int lastButtonIndex = parent.indexOfChild(parent.findViewById(R.id.configure_button));
+
+ final int action = e.getAction();
+ final boolean handleKeyEvent = (action != KeyEvent.ACTION_UP);
+ boolean wasHandled = false;
+ switch (keyCode) {
+ case KeyEvent.KEYCODE_DPAD_LEFT:
+ if (handleKeyEvent) {
+ // Select the previous button, otherwise do nothing (since the button bar is
+ // static)
+ if (buttonIndex > firstButtonIndex) {
+ int newButtonIndex = buttonIndex - 1;
+ while (newButtonIndex >= firstButtonIndex) {
+ View prev = parent.getChildAt(newButtonIndex);
+ if (isVisible(prev) && prev.isFocusable()) {
+ prev.requestFocus();
+ break;
+ }
+ --newButtonIndex;
+ }
+ } else {
+ if (pageIndex > 0) {
+ // Snap to previous page and clear focus
+ workspace.snapToPage(pageIndex - 1);
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_RIGHT:
+ if (handleKeyEvent) {
+ // Select the next button, otherwise do nothing (since the button bar is
+ // static)
+ if (buttonIndex < lastButtonIndex) {
+ int newButtonIndex = buttonIndex + 1;
+ while (newButtonIndex <= lastButtonIndex) {
+ View next = parent.getChildAt(newButtonIndex);
+ if (isVisible(next) && next.isFocusable()) {
+ next.requestFocus();
+ break;
+ }
+ ++newButtonIndex;
+ }
+ } else {
+ if (pageIndex < (pageCount - 1)) {
+ // Snap to next page and clear focus
+ workspace.snapToPage(pageIndex + 1);
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_UP:
+ // Do nothing
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_DOWN:
+ if (handleKeyEvent) {
+ // Select the first bubble text view in the current page of the workspace
+ final CellLayout layout = (CellLayout) workspace.getChildAt(pageIndex);
+ final CellLayoutChildren children = layout.getChildrenLayout();
+ final View newIcon = getBubbleTextViewInDirection(layout, children, -1, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ workspace.requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ default: break;
+ }
+ return wasHandled;
+ }
+
+ /**
+ * Private helper method to get the CellLayoutChildren given a CellLayout index.
+ */
+ private static CellLayoutChildren getCellLayoutChildrenForIndex(ViewGroup container, int i) {
+ ViewGroup parent = (ViewGroup) container.getChildAt(i);
+ return (CellLayoutChildren) parent.getChildAt(0);
+ }
+
+ /**
+ * Private helper method to sort all the CellLayout children in order of their (x,y) spatially
+ * from top left to bottom right.
+ */
+ private static ArrayList<View> getCellLayoutChildrenSortedSpatially(CellLayout layout,
+ ViewGroup parent) {
+ // First we order each the CellLayout children by their x,y coordinates
+ final int cellCountX = layout.getCountX();
+ final int count = parent.getChildCount();
+ ArrayList<View> views = new ArrayList<View>();
+ for (int j = 0; j < count; ++j) {
+ views.add(parent.getChildAt(j));
+ }
+ Collections.sort(views, new Comparator<View>() {
+ @Override
+ public int compare(View lhs, View rhs) {
+ CellLayout.LayoutParams llp = (CellLayout.LayoutParams) lhs.getLayoutParams();
+ CellLayout.LayoutParams rlp = (CellLayout.LayoutParams) rhs.getLayoutParams();
+ int lvIndex = (llp.cellY * cellCountX) + llp.cellX;
+ int rvIndex = (rlp.cellY * cellCountX) + rlp.cellX;
+ return lvIndex - rvIndex;
+ }
+ });
+ return views;
+ }
+ /**
+ * Private helper method to find the index of the next BubbleTextView in the delta direction.
+ * @param delta either -1 or 1 depending on the direction we want to search
+ */
+ private static View findIndexOfBubbleTextView(ArrayList<View> views, int i, int delta) {
+ // Then we find the next BubbleTextView offset by delta from i
+ final int count = views.size();
+ int newI = i + delta;
+ while (0 <= newI && newI < count) {
+ View newV = views.get(newI);
+ if (newV instanceof BubbleTextView) {
+ return newV;
+ }
+ newI += delta;
+ }
+ return null;
+ }
+ private static View getBubbleTextViewInDirection(CellLayout layout, ViewGroup parent, int i,
+ int delta) {
+ final ArrayList<View> views = getCellLayoutChildrenSortedSpatially(layout, parent);
+ return findIndexOfBubbleTextView(views, i, delta);
+ }
+ private static View getBubbleTextViewInDirection(CellLayout layout, ViewGroup parent, View v,
+ int delta) {
+ final ArrayList<View> views = getCellLayoutChildrenSortedSpatially(layout, parent);
+ return findIndexOfBubbleTextView(views, views.indexOf(v), delta);
+ }
+ /**
+ * Private helper method to find the next closest BubbleTextView in the delta direction on the
+ * next line.
+ * @param delta either -1 or 1 depending on the line and direction we want to search
+ */
+ private static View getClosestBubbleTextViewOnLine(CellLayout layout, ViewGroup parent, View v,
+ int lineDelta) {
+ final ArrayList<View> views = getCellLayoutChildrenSortedSpatially(layout, parent);
+ final CellLayout.LayoutParams lp = (CellLayout.LayoutParams) v.getLayoutParams();
+ final int cellCountX = layout.getCountX();
+ final int cellCountY = layout.getCountY();
+ final int row = lp.cellY;
+ final int newRow = row + lineDelta;
+ if (0 <= newRow && newRow < cellCountY) {
+ float closestDistance = Float.MAX_VALUE;
+ int closestIndex = -1;
+ int index = views.indexOf(v);
+ int endIndex = (lineDelta < 0) ? -1 : views.size();
+ while (index != endIndex) {
+ View newV = views.get(index);
+ CellLayout.LayoutParams tmpLp = (CellLayout.LayoutParams) newV.getLayoutParams();
+ boolean satisfiesRow = (lineDelta < 0) ? (tmpLp.cellY < row) : (tmpLp.cellY > row);
+ if (satisfiesRow && newV instanceof BubbleTextView) {
+ float tmpDistance = (float) Math.sqrt(Math.pow(tmpLp.cellX - lp.cellX, 2) +
+ Math.pow(tmpLp.cellY - lp.cellY, 2));
+ if (tmpDistance < closestDistance) {
+ closestIndex = index;
+ closestDistance = tmpDistance;
+ }
+ }
+ if (index <= endIndex) {
+ ++index;
+ } else {
+ --index;
+ }
+ }
+ if (closestIndex > -1) {
+ return views.get(closestIndex);
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Handles key events in a Workspace containing BubbleTextView.
+ */
+ static boolean handleBubbleTextViewKeyEvent(BubbleTextView v, int keyCode, KeyEvent e) {
+ if (!LauncherApplication.isScreenXLarge()) return false;
+
+ CellLayoutChildren parent = (CellLayoutChildren) v.getParent();
+ final CellLayout layout = (CellLayout) parent.getParent();
+ final Workspace workspace = (Workspace) layout.getParent();
+ final ViewGroup launcher = (ViewGroup) workspace.getParent();
+ final ViewGroup tabs = (ViewGroup) launcher.findViewById(R.id.all_apps_button_cluster);
+ int iconIndex = parent.indexOfChild(v);
+ int iconCount = parent.getChildCount();
+ int pageIndex = workspace.indexOfChild(layout);
+ int pageCount = workspace.getChildCount();
+
+ final int action = e.getAction();
+ final boolean handleKeyEvent = (action != KeyEvent.ACTION_UP);
+ boolean wasHandled = false;
+ switch (keyCode) {
+ case KeyEvent.KEYCODE_DPAD_LEFT:
+ if (handleKeyEvent) {
+ // Select the previous icon or the last icon on the previous page if possible
+ View newIcon = getBubbleTextViewInDirection(layout, parent, v, -1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ if (pageIndex > 0) {
+ parent = getCellLayoutChildrenForIndex(workspace, pageIndex - 1);
+ newIcon = getBubbleTextViewInDirection(layout, parent,
+ parent.getChildCount(), -1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ // Snap to the previous page
+ workspace.snapToPage(pageIndex - 1);
+ }
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_RIGHT:
+ if (handleKeyEvent) {
+ // Select the next icon or the first icon on the next page if possible
+ View newIcon = getBubbleTextViewInDirection(layout, parent, v, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ if (pageIndex < (pageCount - 1)) {
+ parent = getCellLayoutChildrenForIndex(workspace, pageIndex + 1);
+ newIcon = getBubbleTextViewInDirection(layout, parent, -1, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ // Snap to the next page
+ workspace.snapToPage(pageIndex + 1);
+ }
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_DPAD_UP:
+ if (handleKeyEvent) {
+ // Select the closest icon in the previous line, otherwise select the tab bar
+ View newIcon = getClosestBubbleTextViewOnLine(layout, parent, v, -1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ wasHandled = true;
+ } else {
+ tabs.requestFocus();
+ }
+ }
+ break;
+ case KeyEvent.KEYCODE_DPAD_DOWN:
+ if (handleKeyEvent) {
+ // Select the closest icon in the next line, otherwise select the tab bar
+ View newIcon = getClosestBubbleTextViewOnLine(layout, parent, v, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ wasHandled = true;
+ }
+ }
+ break;
+ case KeyEvent.KEYCODE_PAGE_UP:
+ if (handleKeyEvent) {
+ // Select the first icon on the previous page or the first icon on this page
+ // if there is no previous page
+ if (pageIndex > 0) {
+ parent = getCellLayoutChildrenForIndex(workspace, pageIndex - 1);
+ View newIcon = getBubbleTextViewInDirection(layout, parent, -1, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ // Snap to the previous page
+ workspace.snapToPage(pageIndex - 1);
+ }
+ } else {
+ View newIcon = getBubbleTextViewInDirection(layout, parent, -1, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_PAGE_DOWN:
+ if (handleKeyEvent) {
+ // Select the first icon on the next page or the last icon on this page
+ // if there is no previous page
+ if (pageIndex < (pageCount - 1)) {
+ parent = getCellLayoutChildrenForIndex(workspace, pageIndex + 1);
+ View newIcon = getBubbleTextViewInDirection(layout, parent, -1, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ } else {
+ // Snap to the next page
+ workspace.snapToPage(pageIndex + 1);
+ }
+ } else {
+ View newIcon = getBubbleTextViewInDirection(layout, parent,
+ parent.getChildCount(), -1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ }
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_MOVE_HOME:
+ if (handleKeyEvent) {
+ // Select the first icon on this page
+ View newIcon = getBubbleTextViewInDirection(layout, parent, -1, 1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ case KeyEvent.KEYCODE_MOVE_END:
+ if (handleKeyEvent) {
+ // Select the last icon on this page
+ View newIcon = getBubbleTextViewInDirection(layout, parent,
+ parent.getChildCount(), -1);
+ if (newIcon != null) {
+ newIcon.requestFocus();
+ }
+ }
+ wasHandled = true;
+ break;
+ default: break;
+ }
+ return wasHandled;
+ }
+}