SelectPopupDropdown.java revision 010d83a9304c5a91596085d917d248abff47903a 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5package org.chromium.content.browser.input;
6
7import android.content.Context;
8import android.graphics.Rect;
9import android.view.View;
10import android.widget.AdapterView;
11
12import org.chromium.content.browser.ContentViewCore;
13import org.chromium.content.browser.RenderCoordinates;
14import org.chromium.ui.DropdownAdapter;
15import org.chromium.ui.DropdownItem;
16import org.chromium.ui.DropdownPopupWindow;
17
18import java.util.List;
19
20/**
21 * Handles the dropdown popup for the <select> HTML tag support.
22 */
23public class SelectPopupDropdown implements SelectPopup {
24
25    private final ContentViewCore mContentViewCore;
26    private final Context mContext;
27
28    private DropdownPopupWindow mDropdownPopupWindow;
29    private int mInitialSelection = -1;
30
31    public SelectPopupDropdown(ContentViewCore contentViewCore, List<SelectPopupItem> items,
32            Rect bounds, int[] selected) {
33        mContentViewCore = contentViewCore;
34        mContext = mContentViewCore.getContext();
35        mDropdownPopupWindow = new DropdownPopupWindow(mContext,
36                mContentViewCore.getViewAndroidDelegate());
37        mDropdownPopupWindow.setOnItemClickListener(new AdapterView.OnItemClickListener() {
38            @Override
39            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
40                int[] selectedIndices = {position};
41                mContentViewCore.selectPopupMenuItems(selectedIndices);
42                hide();
43            }
44        });
45        if (selected.length > 0) {
46            mInitialSelection = selected[0];
47        }
48        DropdownItem[] dropdownItems = items.toArray(new DropdownItem[items.size()]);
49        mDropdownPopupWindow.setAdapter(new DropdownAdapter(mContext, dropdownItems, null));
50        RenderCoordinates renderCoordinates = mContentViewCore.getRenderCoordinates();
51        float anchorX = renderCoordinates.fromPixToDip(
52                renderCoordinates.fromLocalCssToPix(bounds.left));
53        float anchorY = renderCoordinates.fromPixToDip(
54                renderCoordinates.fromLocalCssToPix(bounds.top));
55        float anchorWidth = renderCoordinates.fromPixToDip(
56                renderCoordinates.fromLocalCssToPix(bounds.right)) - anchorX;
57        float anchorHeight = renderCoordinates.fromPixToDip(
58                renderCoordinates.fromLocalCssToPix(bounds.bottom)) - anchorY;
59        mDropdownPopupWindow.setAnchorRect(anchorX, anchorY, anchorWidth, anchorHeight);
60    }
61
62    @Override
63    public void show() {
64        mDropdownPopupWindow.show();
65        if (mInitialSelection >= 0) {
66            mDropdownPopupWindow.getListView().setSelection(mInitialSelection);
67        }
68    }
69
70    @Override
71    public void hide() {
72        mDropdownPopupWindow.dismiss();
73    }
74}
75