/
CheckBoxMainDemoFragment.java
128 lines (114 loc) · 4.88 KB
/
CheckBoxMainDemoFragment.java
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
/*
* Copyright 2018 The Android Open Source Project
*
* 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
*
* https://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 io.material.catalog.checkbox;
import io.material.catalog.R;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.google.android.material.checkbox.MaterialCheckBox;
import com.google.android.material.checkbox.MaterialCheckBox.OnCheckedStateChangedListener;
import io.material.catalog.feature.DemoFragment;
import io.material.catalog.feature.DemoUtils;
import java.util.List;
/** A fragment that displays the main Checkbox demos for the Catalog app. */
public class CheckBoxMainDemoFragment extends DemoFragment {
private boolean isUpdatingChildren = false;
@Override
public View onCreateDemoView(
LayoutInflater layoutInflater, @Nullable ViewGroup viewGroup, @Nullable Bundle bundle) {
View view = layoutInflater.inflate(R.layout.cat_checkbox, viewGroup, false /* attachToRoot */);
ViewGroup toggleContainer = view.findViewById(R.id.checkbox_toggle_container);
List<CheckBox> toggledCheckBoxes = DemoUtils.findViewsWithType(toggleContainer, CheckBox.class);
List<MaterialCheckBox> allCheckBoxes =
DemoUtils.findViewsWithType(view, MaterialCheckBox.class);
CheckBox checkBoxToggle = view.findViewById(R.id.checkbox_toggle);
checkBoxToggle.setOnCheckedChangeListener(
(CompoundButton buttonView, boolean isChecked) -> {
for (CheckBox cb : toggledCheckBoxes) {
cb.setEnabled(isChecked);
}
});
CheckBox checkBoxToggleError = view.findViewById(R.id.checkbox_toggle_error);
checkBoxToggleError.setOnCheckedChangeListener(
(CompoundButton buttonView, boolean isChecked) -> {
for (MaterialCheckBox cb : allCheckBoxes) {
cb.setErrorShown(isChecked);
}
});
CheckBox firstChild = view.findViewById(R.id.checkbox_child_1);
firstChild.setChecked(true);
ViewGroup indeterminateContainer = view.findViewById(R.id.checkbox_indeterminate_container);
List<CheckBox> childrenCheckBoxes =
DemoUtils.findViewsWithType(indeterminateContainer, CheckBox.class);
MaterialCheckBox checkBoxParent = view.findViewById(R.id.checkbox_parent);
OnCheckedStateChangedListener parentOnCheckedStateChangedListener =
(checkBox, state) -> {
boolean isChecked = checkBox.isChecked();
if (state != MaterialCheckBox.STATE_INDETERMINATE) {
isUpdatingChildren = true;
for (CheckBox child : childrenCheckBoxes) {
child.setChecked(isChecked);
}
isUpdatingChildren = false;
}
};
checkBoxParent.addOnCheckedStateChangedListener(parentOnCheckedStateChangedListener);
OnCheckedStateChangedListener childOnCheckedStateChangedListener =
(checkBox, state) -> {
if (isUpdatingChildren) {
return;
}
setParentState(checkBoxParent, childrenCheckBoxes, parentOnCheckedStateChangedListener);
};
for (CheckBox child : childrenCheckBoxes) {
((MaterialCheckBox) child)
.addOnCheckedStateChangedListener(childOnCheckedStateChangedListener);
}
setParentState(checkBoxParent, childrenCheckBoxes, parentOnCheckedStateChangedListener);
return view;
}
private void setParentState(
@NonNull MaterialCheckBox checkBoxParent,
@NonNull List<CheckBox> childrenCheckBoxes,
@NonNull OnCheckedStateChangedListener parentOnCheckedStateChangedListener) {
boolean allChecked = true;
boolean noneChecked = true;
for (CheckBox child : childrenCheckBoxes) {
if (!child.isChecked()) {
allChecked = false;
} else {
noneChecked = false;
}
if (!allChecked && !noneChecked) {
break;
}
}
checkBoxParent.removeOnCheckedStateChangedListener(parentOnCheckedStateChangedListener);
if (allChecked) {
checkBoxParent.setChecked(true);
} else if (noneChecked) {
checkBoxParent.setChecked(false);
} else {
checkBoxParent.setCheckedState(MaterialCheckBox.STATE_INDETERMINATE);
}
checkBoxParent.addOnCheckedStateChangedListener(parentOnCheckedStateChangedListener);
}
}