fix #LINQT-1558 back button on login page without refreshing

Linphone/core/account/AccountList.cpp

@@ -64,8 +64,27 @@ void AccountList::setSelf(QSharedPointer<AccountList> me) {
 			}
 			mModelConnection->invokeToCore([this, accounts, defaultAccountCore, isInitialization]() {
 				mustBeInMainThread(getClassName());
+				auto reallyHaveAccount = [this]() -> bool {
+					// When an account is trying to connect, we don't want to display the features
+					// provided for the accounts that really stays in the account list
+					// (for example the back button to return on the main page in the login page)
+					for (auto &account : getSharedList<AccountCore>()) {
+						if (account->getRegistrationState() != LinphoneEnums::RegistrationState::Progress &&
+						    account->getRegistrationState() != LinphoneEnums::RegistrationState::None) {
+							return true;
+						}
+					}
+					return false;
+				};
+				for (auto &account : getSharedList<AccountCore>()) {
+					disconnect(account.get(), &AccountCore::registrationStateChanged, this, nullptr);
+				}
 				resetData<AccountCore>(*accounts);
-				setHaveAccount(accounts->size() > 0);
+				for (auto &account : getSharedList<AccountCore>()) {
+					connect(account.get(), &AccountCore::registrationStateChanged, this,
+					        [this, reallyHaveAccount] { setHaveAccount(reallyHaveAccount()); });
+				}
+				setHaveAccount(reallyHaveAccount());
 				setDefaultAccount(defaultAccountCore);
 				if (isInitialization) setInitialized(true);
 				delete accounts;

Linphone/view/Page/Window/Main/MainWindow.qml

@@ -112,10 +112,13 @@ AbstractWindow {
 		active: AppCpp.coreStarted
 		sourceComponent: AccountProxy {
 			sourceModel: AppCpp.accounts
-			onInitializedChanged: {
+			onInitializedChanged: if (isInitialized) {
 				mainWindow.accountProxy = this
 				mainWindow.initStackViewItem()
 			}
+			onHaveAccountChanged: {
+				if (isInitialized) mainWindow.initStackViewItem()
+			}
 		}
 	}
 
@@ -123,6 +126,10 @@ AbstractWindow {
 		id: mainWindowStackView
 		anchors.fill: parent
 		initialItem: splashScreen
+		Component.onCompleted: {
+			clear()
+			push(splashScreen)
+		}
 	}
 	Component {
 		id: splashScreen
@@ -151,14 +158,10 @@ AbstractWindow {
 		id: loginPage
 		LoginPage {
 			objectName: "loginPage"
-			showBackButton: false
 			onGoBack: openMainPage()
 			onUseSIPButtonClicked: mainWindowStackView.push(sipLoginPage)
 			onGoToRegister: mainWindowStackView.replace(registerPage)
-            Component.onCompleted: if (accountProxy?.haveAccount) showBackButton = true
+			showBackButton: accountProxy?.haveAccount
-			StackView.onActivated:{
-				if (accountProxy?.haveAccount) showBackButton = true
-			}
 		}
 	}
 	Component {
@@ -172,9 +175,7 @@ AbstractWindow {
 					mainWindowStackView.pop()
 			}
 			onGoToRegister: mainWindowStackView.replace(registerPage)
-			StackView.onActivated:{
+			showBackButton: !SettingsCpp.assistantGoDirectlyToThirdPartySipAccountLogin || accountProxy?.haveAccount
-				if (!SettingsCpp.assistantGoDirectlyToThirdPartySipAccountLogin || accountProxy?.haveAccount) showBackButton = true
-			}
 		}
 	}
 	Component {