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/*
* Copyright 2012 Google Inc.
*
* 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 org.sufficientlysecure.keychain.ui.util;
import android.content.Context;
import android.graphics.Rect;
import android.text.TextUtils;
import android.view.Gravity;
import android.view.View;
import android.widget.Toast;
public class ContentDescriptionHint {
private static final int ESTIMATED_TOAST_HEIGHT_DIPS = 48;
public static void setup(View view) {
view.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
return showLongClickText(view, view.getContentDescription());
}
});
}
public static void setup(View view, final int textResId) {
view.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
return showLongClickText(view, view.getContext().getString(textResId));
}
});
}
public static void setup(View view, final CharSequence text) {
view.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
return showLongClickText(view, text);
}
});
}
public static void remove(final View view) {
view.setOnLongClickListener(null);
}
private static boolean showLongClickText(View view, CharSequence text) {
if (TextUtils.isEmpty(text)) {
return false;
}
final int[] screenPos = new int[2]; // origin is device display
final Rect displayFrame = new Rect(); // includes decorations (e.g. status bar)
view.getLocationOnScreen(screenPos);
view.getWindowVisibleDisplayFrame(displayFrame);
final Context context = view.getContext();
final int viewWidth = view.getWidth();
final int viewHeight = view.getHeight();
final int viewCenterX = screenPos[0] + viewWidth / 2;
final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
final int estimatedToastHeight = (int) (ESTIMATED_TOAST_HEIGHT_DIPS
* context.getResources().getDisplayMetrics().density);
Toast longClickText = Toast.makeText(context, text, Toast.LENGTH_SHORT);
boolean showBelow = screenPos[1] < estimatedToastHeight;
if (showBelow) {
// Show below
// Offsets are after decorations (e.g. status bar) are factored in
longClickText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
viewCenterX - screenWidth / 2,
screenPos[1] - displayFrame.top + viewHeight);
} else {
// Show above
// Offsets are after decorations (e.g. status bar) are factored in
// NOTE: We can't use Gravity.BOTTOM because when the keyboard is up
// its height isn't factored in.
longClickText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
viewCenterX - screenWidth / 2,
screenPos[1] - displayFrame.top - estimatedToastHeight);
}
longClickText.show();
return true;
}
}
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