private void setPopupOffset(
ListPopupWindow popup, int screenRotation, Rect appRect, Rect padding) {
int[] anchorLocation = new int[2];
popup.getAnchorView().getLocationInWindow(anchorLocation);
int anchorHeight = popup.getAnchorView().getHeight();
// If we have a hardware menu button, locate the app menu closer to the estimated
// hardware menu button location.
if (mIsByPermanentButton) {
int horizontalOffset = -anchorLocation[0];
switch (screenRotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_180:
horizontalOffset += (appRect.width() - mPopup.getWidth()) / 2;
break;
case Surface.ROTATION_90:
horizontalOffset += appRect.width() - mPopup.getWidth();
break;
case Surface.ROTATION_270:
break;
default:
assert false;
break;
}
popup.setHorizontalOffset(horizontalOffset);
// The menu is displayed above the anchored view, so shift the menu up by the bottom
// padding of the background.
popup.setVerticalOffset(-padding.bottom);
} else {
// The menu is displayed over and below the anchored view, so shift the menu up by the
// height of the anchor view.
popup.setVerticalOffset(-mNegativeSoftwareVerticalOffset - anchorHeight);
}
}
private void setMenuHeight(
int numMenuItems, Rect appDimensions, int screenHeight, Rect padding, int footerHeight) {
assert mPopup.getAnchorView() != null;
View anchorView = mPopup.getAnchorView();
int[] anchorViewLocation = new int[2];
anchorView.getLocationOnScreen(anchorViewLocation);
anchorViewLocation[1] -= appDimensions.top;
int anchorViewImpactHeight = mIsByPermanentButton ? anchorView.getHeight() : 0;
// Set appDimensions.height() for abnormal anchorViewLocation.
if (anchorViewLocation[1] > screenHeight) {
anchorViewLocation[1] = appDimensions.height();
}
int availableScreenSpace =
Math.max(
anchorViewLocation[1],
appDimensions.height() - anchorViewLocation[1] - anchorViewImpactHeight);
availableScreenSpace -= padding.bottom + footerHeight;
if (mIsByPermanentButton) availableScreenSpace -= padding.top;
int numCanFit = availableScreenSpace / (mItemRowHeight + mItemDividerHeight);
// Fade out the last item if we cannot fit all items.
if (numCanFit < numMenuItems) {
int spaceForFullItems = numCanFit * (mItemRowHeight + mItemDividerHeight);
int spaceForPartialItem = (int) (LAST_ITEM_SHOW_FRACTION * mItemRowHeight);
// Determine which item needs hiding.
if (spaceForFullItems + spaceForPartialItem < availableScreenSpace) {
mPopup.setHeight(spaceForFullItems + spaceForPartialItem + padding.top + padding.bottom);
} else {
mPopup.setHeight(
spaceForFullItems
- mItemRowHeight
+ spaceForPartialItem
+ padding.top
+ padding.bottom);
}
} else {
mPopup.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
}
}