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Make sure pages are always accessible via left/right arrow keys.

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- Handle NextPageFirstItem as first focusable item in reading order
- Handle PreviousPageLastItem as last focusable item in reading order
- Check the hotseat after the workspace in both cases above
- Dpad horizontal navigation (left/right) uses these as a last
  resort (Rule3) to guarantee an item takes focus if a page exists

Note that it is necessary to search for a focusable item because
widgets are not yet focusable.

Bug: 25591057
Change-Id: I953648bd76c657d660a38427fdd4108bf9963c23
This commit is contained in:
Tony Wickham
2015-11-11 09:25:38 -08:00
parent b879abd274
commit af78b59af1
3 changed files with 96 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

97
src/com/android/launcher3/FocusHelper.java
View File

@@ -374,7 +374,9 @@ public class FocusHelper {
// Process the focus.
int newIconIndex = FocusLogic.handleKeyEvent(keyCode, countX,
countY, matrix, iconIndex, pageIndex, pageCount, Utilities.isRtl(v.getResources()));
boolean isRtl = Utilities.isRtl(v.getResources());
View newIcon = null;
CellLayout workspaceLayout = (CellLayout) workspace.getChildAt(pageIndex);
switch (newIconIndex) {
case FocusLogic.NOOP:
if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
@@ -396,20 +398,30 @@ public class FocusHelper {
newIconIndex = FocusLogic.handleKeyEvent(keyCode, countX + 1, countY,
matrix, FocusLogic.PIVOT, newPageIndex, pageCount,
Utilities.isRtl(v.getResources()));
newIcon = parent.getChildAt(newIconIndex);
if (newIconIndex == FocusLogic.NEXT_PAGE_FIRST_ITEM) {
newIcon = handleNextPageFirstItem(workspace, hotseatLayout, pageIndex,
isRtl);
} else if (newIconIndex == FocusLogic.PREVIOUS_PAGE_LAST_ITEM) {
newIcon = handlePreviousPageLastItem(workspace, hotseatLayout, pageIndex,
isRtl);
} else {
newIcon = parent.getChildAt(newIconIndex);
}
}
break;
case FocusLogic.PREVIOUS_PAGE_FIRST_ITEM:
parent = getCellLayoutChildrenForIndex(workspace, pageIndex - 1);
newIcon = parent.getChildAt(0);
workspaceLayout = (CellLayout) workspace.getChildAt(pageIndex - 1);
newIcon = getFirstFocusableIconInReadingOrder(workspaceLayout, isRtl);
if (newIcon == null) {
newIcon = getFirstFocusableIconInReadingOrder(hotseatLayout, isRtl);
workspace.snapToPage(pageIndex - 1);
}
break;
case FocusLogic.PREVIOUS_PAGE_LAST_ITEM:
parent = getCellLayoutChildrenForIndex(workspace, pageIndex - 1);
newIcon = parent.getChildAt(parent.getChildCount() - 1);
newIcon = handlePreviousPageLastItem(workspace, hotseatLayout, pageIndex, isRtl);
break;
case FocusLogic.NEXT_PAGE_FIRST_ITEM:
parent = getCellLayoutChildrenForIndex(workspace, pageIndex + 1);
newIcon = parent.getChildAt(0);
newIcon = handleNextPageFirstItem(workspace, hotseatLayout, pageIndex, isRtl);
break;
case FocusLogic.NEXT_PAGE_LEFT_COLUMN:
case FocusLogic.PREVIOUS_PAGE_LEFT_COLUMN:
@@ -425,14 +437,28 @@ public class FocusHelper {
newIconIndex = FocusLogic.handleKeyEvent(keyCode, countX + 1, countY,
matrix, FocusLogic.PIVOT, newPageIndex, pageCount,
Utilities.isRtl(v.getResources()));
newIcon = parent.getChildAt(newIconIndex);
if (newIconIndex == FocusLogic.NEXT_PAGE_FIRST_ITEM) {
newIcon = handleNextPageFirstItem(workspace, hotseatLayout, pageIndex,
isRtl);
} else if (newIconIndex == FocusLogic.PREVIOUS_PAGE_LAST_ITEM) {
newIcon = handlePreviousPageLastItem(workspace, hotseatLayout, pageIndex,
isRtl);
} else {
newIcon = parent.getChildAt(newIconIndex);
}
}
break;
case FocusLogic.CURRENT_PAGE_FIRST_ITEM:
newIcon = parent.getChildAt(0);
newIcon = getFirstFocusableIconInReadingOrder(workspaceLayout, isRtl);
if (newIcon == null) {
newIcon = getFirstFocusableIconInReadingOrder(hotseatLayout, isRtl);
}
break;
case FocusLogic.CURRENT_PAGE_LAST_ITEM:
newIcon = parent.getChildAt(parent.getChildCount() - 1);
newIcon = getFirstFocusableIconInReverseReadingOrder(workspaceLayout, isRtl);
if (newIcon == null) {
newIcon = getFirstFocusableIconInReverseReadingOrder(hotseatLayout, isRtl);
}
break;
default:
// current page, some item.
@@ -507,4 +533,55 @@ public class FocusHelper {
return (keyCode == KeyEvent.KEYCODE_DEL || keyCode == KeyEvent.KEYCODE_FORWARD_DEL) &&
event.hasModifiers(KeyEvent.META_CTRL_ON);
}
private static View handlePreviousPageLastItem(Workspace workspace, CellLayout hotseatLayout,
int pageIndex, boolean isRtl) {
CellLayout workspaceLayout = (CellLayout) workspace.getChildAt(pageIndex - 1);
View newIcon = getFirstFocusableIconInReverseReadingOrder(workspaceLayout, isRtl);
if (newIcon == null) {
newIcon = getFirstFocusableIconInReverseReadingOrder(hotseatLayout,isRtl);
workspace.snapToPage(pageIndex - 1);
}
return newIcon;
}
private static View handleNextPageFirstItem(Workspace workspace, CellLayout hotseatLayout,
int pageIndex, boolean isRtl) {
CellLayout workspaceLayout = (CellLayout) workspace.getChildAt(pageIndex + 1);
View newIcon = getFirstFocusableIconInReadingOrder(workspaceLayout, isRtl);
if (newIcon == null) {
newIcon = getFirstFocusableIconInReadingOrder(hotseatLayout, isRtl);
workspace.snapToPage(pageIndex + 1);
}
return newIcon;
}
private static View getFirstFocusableIconInReadingOrder(CellLayout cellLayout, boolean isRtl) {
View icon;
int countX = cellLayout.getCountX();
for (int y = 0; y < cellLayout.getCountY(); y++) {
int increment = isRtl ? -1 : 1;
for (int x = isRtl ? countX - 1 : 0; 0 <= x && x < countX; x += increment) {
if ((icon = cellLayout.getChildAt(x, y)) != null && icon.isFocusable()) {
return icon;
}
}
}
return null;
}
private static View getFirstFocusableIconInReverseReadingOrder(CellLayout cellLayout,
boolean isRtl) {
View icon;
int countX = cellLayout.getCountX();
for (int y = cellLayout.getCountY() - 1; y >= 0; y--) {
int increment = isRtl ? 1 : -1;
for (int x = isRtl ? 0 : countX - 1; 0 <= x && x < countX; x += increment) {
if ((icon = cellLayout.getChildAt(x, y)) != null && icon.isFocusable()) {
return icon;
}
}
}
return null;
}
}