101 lines
3.7 KiB
Java
101 lines
3.7 KiB
Java
/*
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* Copyright 2012 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.sufficientlysecure.keychain.ui.util;
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import android.content.Context;
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import android.graphics.Rect;
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import android.text.TextUtils;
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import android.view.Gravity;
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import android.view.View;
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import android.widget.Toast;
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public class ContentDescriptionHint {
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private static final int ESTIMATED_TOAST_HEIGHT_DIPS = 48;
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public static void setup(View view) {
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view.setOnLongClickListener(new View.OnLongClickListener() {
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@Override
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public boolean onLongClick(View view) {
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return showLongClickText(view, view.getContentDescription());
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}
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});
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}
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public static void setup(View view, final int textResId) {
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view.setOnLongClickListener(new View.OnLongClickListener() {
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@Override
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public boolean onLongClick(View view) {
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return showLongClickText(view, view.getContext().getString(textResId));
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}
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});
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}
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public static void setup(View view, final CharSequence text) {
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view.setOnLongClickListener(new View.OnLongClickListener() {
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@Override
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public boolean onLongClick(View view) {
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return showLongClickText(view, text);
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}
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});
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}
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public static void remove(final View view) {
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view.setOnLongClickListener(null);
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}
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private static boolean showLongClickText(View view, CharSequence text) {
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if (TextUtils.isEmpty(text)) {
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return false;
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}
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final int[] screenPos = new int[2]; // origin is device display
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final Rect displayFrame = new Rect(); // includes decorations (e.g. status bar)
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view.getLocationOnScreen(screenPos);
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view.getWindowVisibleDisplayFrame(displayFrame);
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final Context context = view.getContext();
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final int viewWidth = view.getWidth();
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final int viewHeight = view.getHeight();
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final int viewCenterX = screenPos[0] + viewWidth / 2;
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final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
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final int estimatedToastHeight = (int) (ESTIMATED_TOAST_HEIGHT_DIPS
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* context.getResources().getDisplayMetrics().density);
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Toast longClickText = Toast.makeText(context, text, Toast.LENGTH_SHORT);
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boolean showBelow = screenPos[1] < estimatedToastHeight;
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if (showBelow) {
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// Show below
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// Offsets are after decorations (e.g. status bar) are factored in
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longClickText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
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viewCenterX - screenWidth / 2,
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screenPos[1] - displayFrame.top + viewHeight);
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} else {
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// Show above
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// Offsets are after decorations (e.g. status bar) are factored in
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// NOTE: We can't use Gravity.BOTTOM because when the keyboard is up
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// its height isn't factored in.
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longClickText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
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viewCenterX - screenWidth / 2,
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screenPos[1] - displayFrame.top - estimatedToastHeight);
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}
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longClickText.show();
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return true;
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}
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}
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