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/*
* The MIT License (MIT)
*
* Copyright (c) 2012-2014 lacolaco.net
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.lacolaco.smileessence.view.page
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.AbsListView
import android.widget.ListView
import com.handmark.pulltorefresh.library.PullToRefreshBase
import com.handmark.pulltorefresh.library.PullToRefreshListView
import kotlinx.android.synthetic.main.fragment_list.view.*
import net.lacolaco.smileessence.R
import net.lacolaco.smileessence.view.adapter.CustomListAdapter
abstract class CustomListFragment<out T : CustomListAdapter<*>> : PageFragment(),
AbsListView.OnScrollListener, PullToRefreshBase.OnRefreshListener2<ListView> {
protected abstract val adapter: T
protected open val refreshMode: PullToRefreshBase.Mode
get() = PullToRefreshBase.Mode.DISABLED
override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {}
override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {}
override fun onScrollStateChanged(absListView: AbsListView, scrollState: Int) {
val adapter = adapter
if (scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL &&
absListView.firstVisiblePosition == 0 && (absListView.getChildAt(0) == null ||
absListView.getChildAt(0).top == 0)) {
adapter.setNotifiable(true)
updateListViewWithNotice(absListView, true)
} else {
adapter.setNotifiable(false)
}
}
override fun onScroll(absListView: AbsListView, i: Int, i2: Int, i3: Int) {}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup, savedInstanceState: Bundle?): View {
return inflater.inflate(R.layout.fragment_list, container, false)
}
override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val listView = getListView(view!!)
listView.setAdapter(adapter)
listView.setOnScrollListener(this)
listView.setOnRefreshListener(this)
listView.mode = refreshMode
}
protected open fun getListView(page: View): PullToRefreshListView {
return page.fragment_list_listview
}
protected fun updateListViewWithNotice(absListView: AbsListView, addedToTop: Boolean) {
val adapter = adapter
val before = adapter.count
adapter.notifyDataSetChanged() // synchronized call (not adapter#updateForce())
val after = adapter.count
val increments = after - before
if (increments > 0) {
if (addedToTop) {
absListView.setSelection(increments + 1)
absListView.smoothScrollToPositionFromTop(increments, 0)
absListView.setSelection(increments)
} else {
absListView.smoothScrollToPositionFromTop(before, 0)
}
if (increments > 1) {
adapter.setNotifiable(false)
}
}
}
}
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