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/*
* Copyright (C) 2014 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
*
* http://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 android.widget;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.accessibility.AccessibilityEvent;
import java.util.Calendar;
import com.android.internal.R;
/**
* Displays a selectable list of years.
*/
class YearPickerView extends ListView implements AdapterView.OnItemClickListener,
OnDateChangedListener {
private DatePickerController mController;
private YearAdapter mAdapter;
private int mViewSize;
private int mChildSize;
private int mSelectedPosition = -1;
private int mYearSelectedCircleColor;
public YearPickerView(Context context) {
this(context, null);
}
public YearPickerView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.listViewStyle);
}
public YearPickerView(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public YearPickerView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
final LayoutParams frame = new LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
setLayoutParams(frame);
final Resources res = context.getResources();
mViewSize = res.getDimensionPixelOffset(R.dimen.datepicker_view_animator_height);
mChildSize = res.getDimensionPixelOffset(R.dimen.datepicker_year_label_height);
setVerticalFadingEdgeEnabled(true);
setFadingEdgeLength(mChildSize / 3);
final int paddingTop = res.getDimensionPixelSize(
R.dimen.datepicker_year_picker_padding_top);
setPadding(0, paddingTop, 0, 0);
setOnItemClickListener(this);
setDividerHeight(0);
}
public void init(DatePickerController controller) {
mController = controller;
mController.registerOnDateChangedListener(this);
mAdapter = new YearAdapter(getContext(), R.layout.year_label_text_view);
updateAdapterData();
setAdapter(mAdapter);
onDateChanged();
}
public void setYearSelectedCircleColor(int color) {
if (color != mYearSelectedCircleColor) {
mYearSelectedCircleColor = color;
}
requestLayout();
}
public int getYearSelectedCircleColor() {
return mYearSelectedCircleColor;
}
private void updateAdapterData() {
mAdapter.clear();
final int maxYear = mController.getMaxYear();
for (int year = mController.getMinYear(); year <= maxYear; year++) {
mAdapter.add(year);
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
mController.tryVibrate();
if (position != mSelectedPosition) {
mSelectedPosition = position;
mAdapter.notifyDataSetChanged();
}
mController.onYearSelected(mAdapter.getItem(position));
}
void setItemTextAppearance(int resId) {
mAdapter.setItemTextAppearance(resId);
}
private class YearAdapter extends ArrayAdapter<Integer> {
int mItemTextAppearanceResId;
public YearAdapter(Context context, int resource) {
super(context, resource);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextViewWithCircularIndicator v = (TextViewWithCircularIndicator)
super.getView(position, convertView, parent);
v.setTextAppearance(getContext(), mItemTextAppearanceResId);
v.requestLayout();
int year = getItem(position);
boolean selected = mController.getSelectedDay().get(Calendar.YEAR) == year;
v.setDrawIndicator(selected);
if (selected) {
v.setCircleColor(mYearSelectedCircleColor);
}
return v;
}
public void setItemTextAppearance(int resId) {
mItemTextAppearanceResId = resId;
}
}
public void postSetSelectionCentered(final int position) {
postSetSelectionFromTop(position, mViewSize / 2 - mChildSize / 2);
}
public void postSetSelectionFromTop(final int position, final int offset) {
post(new Runnable() {
@Override
public void run() {
setSelectionFromTop(position, offset);
requestLayout();
}
});
}
public int getFirstPositionOffset() {
final View firstChild = getChildAt(0);
if (firstChild == null) {
return 0;
}
return firstChild.getTop();
}
@Override
public void onDateChanged() {
updateAdapterData();
mAdapter.notifyDataSetChanged();
postSetSelectionCentered(
mController.getSelectedDay().get(Calendar.YEAR) - mController.getMinYear());
}
@Override
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(event);
if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
event.setFromIndex(0);
event.setToIndex(0);
}
}
}
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