1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/widget/ArrowPopup.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,129 @@
1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +package org.mozilla.gecko.widget;
1.10 +
1.11 +import org.mozilla.gecko.GeckoApp;
1.12 +import org.mozilla.gecko.R;
1.13 +import org.mozilla.gecko.util.HardwareUtils;
1.14 +
1.15 +import android.content.res.Resources;
1.16 +import android.graphics.drawable.BitmapDrawable;
1.17 +import android.os.Build;
1.18 +import android.view.Gravity;
1.19 +import android.view.LayoutInflater;
1.20 +import android.view.View;
1.21 +import android.view.ViewGroup;
1.22 +import android.widget.ImageView;
1.23 +import android.widget.LinearLayout;
1.24 +import android.widget.PopupWindow;
1.25 +import android.widget.RelativeLayout;
1.26 +
1.27 +public class ArrowPopup extends PopupWindow {
1.28 + protected final GeckoApp mActivity;
1.29 +
1.30 + private View mAnchor;
1.31 + private ImageView mArrow;
1.32 +
1.33 + private int mArrowWidth;
1.34 + private int mYOffset;
1.35 +
1.36 + protected LinearLayout mContent;
1.37 + protected boolean mInflated;
1.38 +
1.39 + public ArrowPopup(GeckoApp aActivity) {
1.40 + this(aActivity, null);
1.41 + }
1.42 +
1.43 + public ArrowPopup(GeckoApp activity, View anchor) {
1.44 + super(activity);
1.45 + mActivity = activity;
1.46 + mAnchor = anchor;
1.47 +
1.48 + mInflated = false;
1.49 +
1.50 + final Resources res = activity.getResources();
1.51 + mArrowWidth = res.getDimensionPixelSize(R.dimen.menu_popup_arrow_width);
1.52 + mYOffset = res.getDimensionPixelSize(R.dimen.menu_popup_arrow_offset);
1.53 +
1.54 + setAnimationStyle(R.style.PopupAnimation);
1.55 + }
1.56 +
1.57 + public void setAnchor(View anchor) {
1.58 + mAnchor = anchor;
1.59 + }
1.60 +
1.61 + protected void init() {
1.62 + setBackgroundDrawable(new BitmapDrawable());
1.63 + setOutsideTouchable(true);
1.64 +
1.65 + setWindowLayoutMode(HardwareUtils.isTablet() ? ViewGroup.LayoutParams.WRAP_CONTENT : ViewGroup.LayoutParams.FILL_PARENT,
1.66 + ViewGroup.LayoutParams.WRAP_CONTENT);
1.67 +
1.68 + LayoutInflater inflater = LayoutInflater.from(mActivity);
1.69 + RelativeLayout layout = (RelativeLayout) inflater.inflate(R.layout.arrow_popup, null);
1.70 + setContentView(layout);
1.71 +
1.72 + mArrow = (ImageView) layout.findViewById(R.id.arrow);
1.73 + mContent = (LinearLayout) layout.findViewById(R.id.content);
1.74 +
1.75 + mInflated = true;
1.76 + }
1.77 +
1.78 + /*
1.79 + * Shows the popup with the arrow pointing to the center of the anchor view. If an anchor hasn't
1.80 + * been set or isn't visible, the popup will just be shown at the top of the gecko app view.
1.81 + */
1.82 + public void show() {
1.83 + int[] anchorLocation = new int[2];
1.84 + if (mAnchor != null)
1.85 + mAnchor.getLocationInWindow(anchorLocation);
1.86 +
1.87 + // If there's no anchor or the anchor is out of the window bounds,
1.88 + // just show the popup at the top of the gecko app view.
1.89 + if (mAnchor == null || anchorLocation[1] < 0) {
1.90 + final View view = mActivity.getView();
1.91 +
1.92 + // Bug in android code causes the window layout parameters to be ignored
1.93 + // when using showAtLocation() in Gingerbread phones.
1.94 + if (Build.VERSION.SDK_INT < 11) {
1.95 + setWidth(view.getWidth());
1.96 + setHeight(view.getHeight());
1.97 + }
1.98 +
1.99 + showAtLocation(view, Gravity.TOP, 0, 0);
1.100 + return;
1.101 + }
1.102 +
1.103 + // Remove padding from the width of the anchor when calculating the arrow offset.
1.104 + int anchorWidth = mAnchor.getWidth() - mAnchor.getPaddingLeft() - mAnchor.getPaddingRight();
1.105 + // This is the difference between the edge of the anchor view and the edge of the arrow view.
1.106 + // We're making an assumption here that the anchor view is wider than the arrow view.
1.107 + int arrowOffset = (anchorWidth - mArrowWidth)/2 + mAnchor.getPaddingLeft();
1.108 +
1.109 + // The horizontal offset of the popup window, relative to the left side of the anchor view.
1.110 + int offset = 0;
1.111 +
1.112 + RelativeLayout.LayoutParams arrowLayoutParams = (RelativeLayout.LayoutParams) mArrow.getLayoutParams();
1.113 +
1.114 + if (HardwareUtils.isTablet()) {
1.115 + // On tablets, the popup has a fixed width, so we use a horizontal offset to position it.
1.116 + // The arrow's left margin is set by the arrow_popup.xml layout file.
1.117 + // This assumes that anchor is not too close to the right side of the screen.
1.118 + offset = arrowOffset - arrowLayoutParams.leftMargin;
1.119 + } else {
1.120 + // On phones, the popup takes up the width of the screen, so we set the arrow's left
1.121 + // margin to make it line up with the anchor.
1.122 + int leftMargin = anchorLocation[0] + arrowOffset;
1.123 + arrowLayoutParams.setMargins(leftMargin, 0, 0, 0);
1.124 + }
1.125 +
1.126 + if (isShowing()) {
1.127 + update(mAnchor, offset, -mYOffset, -1, -1);
1.128 + } else {
1.129 + showAsDropDown(mAnchor, offset, -mYOffset);
1.130 + }
1.131 + }
1.132 +}
