Signal-Android/app/src/main/java/org/thoughtcrime/securesms/components/WrapperDialogFragment.kt

74 wiersze
2.2 KiB
Kotlin

package org.thoughtcrime.securesms.components
import android.content.DialogInterface
import android.os.Bundle
import android.view.View
import androidx.activity.OnBackPressedCallback
import androidx.fragment.app.DialogFragment
import androidx.fragment.app.Fragment
import org.thoughtcrime.securesms.R
import org.thoughtcrime.securesms.util.fragments.findListener
/**
* Convenience class for wrapping Fragments in full-screen dialogs. Due to how fragments work, they
* must be public static classes. Therefore, this class should be subclassed as its own entity, rather
* than via `object : WrapperDialogFragment`.
*
* Example usage:
*
* ```
* class Dialog : WrapperDialogFragment() {
* override fun getWrappedFragment(): Fragment {
* return NavHostFragment.create(R.navigation.private_story_settings, requireArguments())
* }
* }
*
* companion object {
* fun createAsDialog(distributionListId: DistributionListId): DialogFragment {
* return Dialog().apply {
* arguments = PrivateStorySettingsFragmentArgs.Builder(distributionListId).build().toBundle()
* }
* }
* }
* ```
*/
abstract class WrapperDialogFragment : DialogFragment(R.layout.fragment_container) {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setStyle(STYLE_NO_FRAME, R.style.Signal_DayNight_Dialog_FullScreen)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
requireActivity().onBackPressedDispatcher.addCallback(
viewLifecycleOwner,
object : OnBackPressedCallback(true) {
override fun handleOnBackPressed() {
onHandleBackPressed()
}
}
)
if (savedInstanceState == null) {
childFragmentManager.beginTransaction()
.replace(R.id.fragment_container, getWrappedFragment())
.commitAllowingStateLoss()
}
}
open fun onHandleBackPressed() {
dismissAllowingStateLoss()
}
override fun onDismiss(dialog: DialogInterface) {
findListener<WrapperDialogFragmentCallback>()?.onWrapperDialogFragmentDismissed()
}
abstract fun getWrappedFragment(): Fragment
interface WrapperDialogFragmentCallback {
fun onWrapperDialogFragmentDismissed()
}
}