1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.home;
import org.mozilla.gecko.R;
import org.mozilla.gecko.ThumbnailHelper;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View;
import android.widget.AbsListView;
import android.widget.GridView;
/**
* A grid view of top and pinned sites.
* Each cell in the grid is a TopSitesGridItemView.
*/
public class TopSitesGridView extends GridView {
private static final String LOGTAG = "GeckoTopSitesGridView";
// Listener for editing pinned sites.
public static interface OnEditPinnedSiteListener {
public void onEditPinnedSite(int position, String searchTerm);
}
// Max number of top sites that needs to be shown.
private final int mMaxSites;
// Number of columns to show.
private final int mNumColumns;
// Horizontal spacing in between the rows.
private final int mHorizontalSpacing;
// Vertical spacing in between the rows.
private final int mVerticalSpacing;
// Measured width of this view.
private int mMeasuredWidth;
// Measured height of this view.
private int mMeasuredHeight;
// A dummy View used to measure the required size of the child Views.
private final TopSitesGridItemView dummyChildView;
// Context menu info.
private TopSitesGridContextMenuInfo mContextMenuInfo;
// Whether we're handling focus changes or not. This is used
// to avoid infinite re-layouts when using this GridView as
// a ListView header view (see bug 918044).
private boolean mIsHandlingFocusChange;
public TopSitesGridView(Context context) {
this(context, null);
}
public TopSitesGridView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.topSitesGridViewStyle);
}
public TopSitesGridView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mMaxSites = getResources().getInteger(R.integer.number_of_top_sites);
mNumColumns = getResources().getInteger(R.integer.number_of_top_sites_cols);
setNumColumns(mNumColumns);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TopSitesGridView, defStyle, 0);
mHorizontalSpacing = a.getDimensionPixelOffset(R.styleable.TopSitesGridView_android_horizontalSpacing, 0x00);
mVerticalSpacing = a.getDimensionPixelOffset(R.styleable.TopSitesGridView_android_verticalSpacing, 0x00);
a.recycle();
dummyChildView = new TopSitesGridItemView(context);
// Set a default LayoutParams on the child, if it doesn't have one on its own.
AbsListView.LayoutParams params = (AbsListView.LayoutParams) dummyChildView.getLayoutParams();
if (params == null) {
params = new AbsListView.LayoutParams(AbsListView.LayoutParams.WRAP_CONTENT,
AbsListView.LayoutParams.WRAP_CONTENT);
dummyChildView.setLayoutParams(params);
}
}
@Override
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
mIsHandlingFocusChange = true;
super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
mIsHandlingFocusChange = false;
}
@Override
public void requestLayout() {
if (!mIsHandlingFocusChange) {
super.requestLayout();
}
}
@Override
public int getColumnWidth() {
// This method will be called from onMeasure() too.
// It's better to use getMeasuredWidth(), as it is safe in this case.
final int totalHorizontalSpacing = mNumColumns > 0 ? (mNumColumns - 1) * mHorizontalSpacing : 0;
return (getMeasuredWidth() - getPaddingLeft() - getPaddingRight() - totalHorizontalSpacing) / mNumColumns;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// Sets the padding for this view.
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int measuredWidth = getMeasuredWidth();
if (measuredWidth == mMeasuredWidth) {
// Return the cached values as the width is the same.
setMeasuredDimension(mMeasuredWidth, mMeasuredHeight);
return;
}
final int columnWidth = getColumnWidth();
// Measure the exact width of the child, and the height based on the width.
// Note: the child (and TopSitesThumbnailView) takes care of calculating its height.
int childWidthSpec = MeasureSpec.makeMeasureSpec(columnWidth, MeasureSpec.EXACTLY);
int childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
dummyChildView.measure(childWidthSpec, childHeightSpec);
final int childHeight = dummyChildView.getMeasuredHeight();
// This is the maximum width of the contents of each child in the grid.
// Use this as the target width for thumbnails.
final int thumbnailWidth = dummyChildView.getMeasuredWidth() - dummyChildView.getPaddingLeft() - dummyChildView.getPaddingRight();
ThumbnailHelper.getInstance().setThumbnailWidth(thumbnailWidth);
// Number of rows required to show these top sites.
final int rows = (int) Math.ceil((double) mMaxSites / mNumColumns);
final int childrenHeight = childHeight * rows;
final int totalVerticalSpacing = rows > 0 ? (rows - 1) * mVerticalSpacing : 0;
// Total height of this view.
final int measuredHeight = childrenHeight + getPaddingTop() + getPaddingBottom() + totalVerticalSpacing;
setMeasuredDimension(measuredWidth, measuredHeight);
mMeasuredWidth = measuredWidth;
mMeasuredHeight = measuredHeight;
}
@Override
public ContextMenuInfo getContextMenuInfo() {
return mContextMenuInfo;
}
public void setContextMenuInfo(TopSitesGridContextMenuInfo contextMenuInfo) {
mContextMenuInfo = contextMenuInfo;
}
/**
* Stores information regarding the creation of the context menu for a GridView item.
*/
public static class TopSitesGridContextMenuInfo extends HomeContextMenuInfo {
public int type = -1;
public TopSitesGridContextMenuInfo(View targetView, int position, long id) {
super(targetView, position, id);
this.itemType = RemoveItemType.HISTORY;
}
}
}
|
