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/*
* Copyright (C) 2022 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 com.android.systemui.user
import android.content.Context
import android.graphics.Canvas
import android.graphics.drawable.ShapeDrawable
import android.view.View
import android.view.View.MeasureSpec
import android.widget.ListAdapter
import android.widget.ListPopupWindow
import android.widget.ListView
import com.android.systemui.R
/**
* Popup menu for displaying items on the fullscreen user switcher.
*/
class UserSwitcherPopupMenu(
private val context: Context
) : ListPopupWindow(context) {
private val res = context.resources
private var adapter: ListAdapter? = null
init {
setBackgroundDrawable(null)
setModal(false)
setOverlapAnchor(true)
}
override fun setAdapter(adapter: ListAdapter?) {
super.setAdapter(adapter)
this.adapter = adapter
}
/**
* Show the dialog.
*/
override fun show() {
// need to call show() first in order to construct the listView
super.show()
val listView = getListView()
listView.setVerticalScrollBarEnabled(false)
listView.setHorizontalScrollBarEnabled(false)
// Creates a transparent spacer between items
val shape = ShapeDrawable()
shape.setAlpha(0)
listView.setDivider(shape)
listView.setDividerHeight(res.getDimensionPixelSize(
R.dimen.bouncer_user_switcher_popup_divider_height))
val height = res.getDimensionPixelSize(R.dimen.bouncer_user_switcher_popup_header_height)
listView.addHeaderView(createSpacer(height), null, false)
listView.addFooterView(createSpacer(height), null, false)
setWidth(findMaxWidth(listView))
super.show()
}
private fun findMaxWidth(listView: ListView): Int {
var maxWidth = 0
adapter?.let {
val parentWidth = res.getDisplayMetrics().widthPixels
val spec = MeasureSpec.makeMeasureSpec(
(parentWidth * 0.25).toInt(),
MeasureSpec.AT_MOST
)
for (i in 0 until it.getCount()) {
val child = it.getView(i, null, listView)
child.measure(spec, MeasureSpec.UNSPECIFIED)
maxWidth = Math.max(child.getMeasuredWidth(), maxWidth)
}
}
return maxWidth
}
private fun createSpacer(height: Int): View {
return object : View(context) {
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
setMeasuredDimension(1, height)
}
override fun draw(canvas: Canvas) {
}
}
}
}
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