Example usage for android.widget PopupWindow INPUT_METHOD_NEEDED

Introduction

In this page you can find the example usage for android.widget PopupWindow INPUT_METHOD_NEEDED.

Prototype

int INPUT_METHOD_NEEDED

To view the source code for android.widget PopupWindow INPUT_METHOD_NEEDED.

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Document

Mode for #setInputMethodMode(int) : this popup always needs to work with an input method, regardless of whether it is focusable.

Usage

From source file:android.support.v7.widget.AbstractXpListPopupWindow.java

/**
 * Filter key down events. By forwarding key down events to this function,
 * views using non-modal ListPopupWindow can have it handle key selection of items.
 *
 * @param keyCode keyCode param passed to the host view's onKeyDown
 * @param event event param passed to the host view's onKeyDown
 * @return true if the event was handled, false if it was ignored.
 * @see #setModal(boolean)//from w  w  w .  j a v a 2 s .  c  o m
 */
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // when the drop down is shown, we drive it directly
    if (isShowing()) {
        // the key events are forwarded to the list in the drop down view
        // note that ListView handles space but we don't want that to happen
        // also if selection is not currently in the drop down, then don't
        // let center or enter presses go there since that would cause it
        // to select one of its items
        if (keyCode != KeyEvent.KEYCODE_SPACE
                && (mDropDownList.getSelectedItemPosition() >= 0 || !isConfirmKey(keyCode))) {
            int curIndex = mDropDownList.getSelectedItemPosition();
            boolean consumed;

            final boolean below = !mPopup.isAboveAnchor();

            final ListAdapter adapter = mAdapter;

            boolean allEnabled;
            int firstItem = Integer.MAX_VALUE;
            int lastItem = Integer.MIN_VALUE;

            if (adapter != null) {
                allEnabled = adapter.areAllItemsEnabled();
                firstItem = allEnabled ? 0 : mDropDownList.lookForSelectablePosition(0, true);
                lastItem = allEnabled ? adapter.getCount() - 1
                        : mDropDownList.lookForSelectablePosition(adapter.getCount() - 1, false);
            }

            if ((below && keyCode == KeyEvent.KEYCODE_DPAD_UP && curIndex <= firstItem)
                    || (!below && keyCode == KeyEvent.KEYCODE_DPAD_DOWN && curIndex >= lastItem)) {
                // When the selection is at the top, we block the key
                // event to prevent focus from moving.
                clearListSelection();
                mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
                show();
                return true;
            } else {
                // WARNING: Please read the comment where mListSelectionHidden
                //          is declared
                mDropDownList.setListSelectionHidden(false);
            }

            consumed = mDropDownList.onKeyDown(keyCode, event);
            if (DEBUG)
                Log.v(TAG, "Key down: code=" + keyCode + " list consumed=" + consumed);

            if (consumed) {
                // If it handled the key event, then the user is
                // navigating in the list, so we should put it in front.
                mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
                // Here's a little trick we need to do to make sure that
                // the list view is actually showing its focus indicator,
                // by ensuring it has focus and getting its window out
                // of touch mode.
                mDropDownList.requestFocusFromTouch();
                show();

                switch (keyCode) {
                // avoid passing the focus from the text view to the
                // next component
                case KeyEvent.KEYCODE_ENTER:
                case KeyEvent.KEYCODE_DPAD_CENTER:
                case KeyEvent.KEYCODE_DPAD_DOWN:
                case KeyEvent.KEYCODE_DPAD_UP:
                    return true;
                }
            } else {
                if (below && keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
                    // when the selection is at the bottom, we block the
                    // event to avoid going to the next focusable widget
                    if (curIndex == lastItem) {
                        return true;
                    }
                } else if (!below && keyCode == KeyEvent.KEYCODE_DPAD_UP && curIndex == firstItem) {
                    return true;
                }
            }
        }
    }

    return false;
}

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