From afdb83f84844094b86ad60e1bee18996d26cd5d9 Mon Sep 17 00:00:00 2001
From: Chumva <chumva.forever@gmail.com>
Date: Fri, 6 Jul 2018 19:15:53 +0300
Subject: [PATCH] add match parent continue button if keyboard visible

---
 OsmAnd-telegram/res/layout/login_dialog.xml   |  2 ++
 .../osmand/telegram/ui/LoginDialogFragment.kt | 32 +++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/OsmAnd-telegram/res/layout/login_dialog.xml b/OsmAnd-telegram/res/layout/login_dialog.xml
index f931571b73..9ecec70ff7 100644
--- a/OsmAnd-telegram/res/layout/login_dialog.xml
+++ b/OsmAnd-telegram/res/layout/login_dialog.xml
@@ -376,6 +376,8 @@
 				android:layout_height="wrap_content"
 				android:layout_gravity="bottom|center_horizontal"
 				android:layout_marginBottom="@dimen/dialog_button_bottom_padding"
+				android:layout_marginLeft="@dimen/content_padding_half"
+				android:layout_marginRight="@dimen/content_padding_half"
 				android:text="@string/shared_string_continue" />
 
 		</FrameLayout>
diff --git a/OsmAnd-telegram/src/net/osmand/telegram/ui/LoginDialogFragment.kt b/OsmAnd-telegram/src/net/osmand/telegram/ui/LoginDialogFragment.kt
index 42402e0e30..dd13f1dedf 100644
--- a/OsmAnd-telegram/src/net/osmand/telegram/ui/LoginDialogFragment.kt
+++ b/OsmAnd-telegram/src/net/osmand/telegram/ui/LoginDialogFragment.kt
@@ -16,6 +16,7 @@ import net.osmand.telegram.R
 import net.osmand.telegram.utils.AndroidUtils
 import studio.carbonylgroup.textfieldboxes.ExtendedEditText
 import android.content.Intent
+import android.graphics.Rect
 import android.net.Uri
 import android.support.v4.content.ContextCompat
 import android.view.*
@@ -37,10 +38,13 @@ class LoginDialogFragment : DialogFragment() {
 		private const val SHOW_PROGRESS_PARAM_KEY = "show_progress_param"
 		private const val SHOW_WELCOME_DIALOG_PARAM_KEY = "show_welcome_dialog_param"
 		private const val TELEGRAM_PACKAGE = "org.telegram.messenger"
+		private const val SOFT_KEYBOARD_MIN_DETECTION_SIZE = 0.15
 
 		var welcomeDialogShown = false
 			private set
 
+		private var softKeyboardShown: Boolean = false
+
 		fun showWelcomeDialog(fragmentManager: FragmentManager) {
 			welcomeDialogShown = true
 			showDialog(fragmentManager, welcomeDialog = true)
@@ -134,9 +138,37 @@ class LoginDialogFragment : DialogFragment() {
 		}
 
 		buildDialog(view)
+		view.viewTreeObserver.addOnGlobalLayoutListener {
+			val r = Rect()
+			view.getWindowVisibleDisplayFrame(r)
+			val screenHeight = view.rootView.height
+			val keypadHeight = screenHeight - r.bottom
+			val softKeyboardVisible = keypadHeight > screenHeight * SOFT_KEYBOARD_MIN_DETECTION_SIZE
+			if (!softKeyboardShown && softKeyboardVisible) {
+				softKeyboardShown = softKeyboardVisible
+				setContinueButtonSize(true)
+			} else if (softKeyboardShown && !softKeyboardVisible) {
+				setContinueButtonSize(false)
+			}
+			softKeyboardShown = softKeyboardVisible
+		}
 		return view
 	}
 
+	private fun setContinueButtonSize(isWide: Boolean) {
+		val params = continueButton.layoutParams
+		if (params is ViewGroup.MarginLayoutParams) {
+			if (isWide) {
+				params.setMargins(params.leftMargin, params.topMargin, params.rightMargin, AndroidUtils.dpToPx(context!!, 16F))
+				params.width = ViewGroup.LayoutParams.MATCH_PARENT
+			} else {
+				params.setMargins(params.leftMargin, params.topMargin, params.rightMargin, AndroidUtils.dpToPx(context!!, 40F))
+				params.width = ViewGroup.LayoutParams.WRAP_CONTENT
+			}
+			continueButton.requestLayout()
+		}
+	}
+
 	override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
 		return object : Dialog(requireActivity(), theme) {
 			override fun onBackPressed() {