mirror of
https://github.com/mozilla/gecko-dev.git
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91 lines
3.2 KiB
Java
91 lines
3.2 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko;
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import android.content.Context;
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import android.content.res.Resources;
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import android.graphics.Color;
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import android.graphics.drawable.ColorDrawable;
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import android.view.Gravity;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ImageView;
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import android.widget.PopupWindow;
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import android.widget.RelativeLayout;
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import android.widget.RelativeLayout.LayoutParams;
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/**
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* A popup to show the inflated MenuPanel. This has an arrow pointing to the anchor.
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*/
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public class MenuPopup extends PopupWindow {
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private Resources mResources;
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private ImageView mArrow;
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private RelativeLayout mPanel;
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private int mYOffset;
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private int mArrowMargin;
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private int mPopupWidth;
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public MenuPopup(Context context) {
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super(context);
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mResources = context.getResources();
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setFocusable(true);
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mYOffset = mResources.getDimensionPixelSize(R.dimen.menu_popup_offset);
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mArrowMargin = mResources.getDimensionPixelSize(R.dimen.menu_popup_arrow_margin);
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mPopupWidth = mResources.getDimensionPixelSize(R.dimen.menu_popup_width);
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// Setting a null background makes the popup to not close on touching outside.
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setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
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setWindowLayoutMode(View.MeasureSpec.makeMeasureSpec(mPopupWidth, View.MeasureSpec.AT_MOST),
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ViewGroup.LayoutParams.WRAP_CONTENT);
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LayoutInflater inflater = LayoutInflater.from(context);
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RelativeLayout layout = (RelativeLayout) inflater.inflate(R.layout.menu_popup, null);
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setContentView(layout);
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mArrow = (ImageView) layout.findViewById(R.id.menu_arrow);
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mPanel = (RelativeLayout) layout.findViewById(R.id.menu_panel);
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}
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/**
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* Adds the panel with the menu to its content.
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*
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* @param view The panel view with the menu to be shown.
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*/
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public void setPanelView(View view) {
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mPanel.removeAllViews();
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mPanel.addView(view);
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}
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/**
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* A small little offset for the arrow to overlap the anchor.
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*/
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@Override
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public void showAsDropDown(View anchor) {
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int[] anchorLocation = new int[2];
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anchor.getLocationOnScreen(anchorLocation);
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int screenWidth = mResources.getDisplayMetrics().widthPixels;
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int arrowWidth = mResources.getDimensionPixelSize(R.dimen.menu_popup_arrow_width);
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LayoutParams params = (LayoutParams) mArrow.getLayoutParams();
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int arrowOffset = (anchor.getWidth() - arrowWidth)/2;
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if (anchorLocation[0] + mPopupWidth <= screenWidth) {
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// left align
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params.rightMargin = mPopupWidth - anchor.getWidth() + arrowOffset;
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} else {
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// right align
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params.rightMargin = mArrowMargin;
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}
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showAsDropDown(anchor, 0, -mYOffset);
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}
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}
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