UI: Pre-stream wizard buttons are dynamic

Hide buttons that are disabled for better user clarity.

UI/data/locale/en-US.ini

@@ -710,7 +710,7 @@ Basic.Settings.Stream.MissingStreamKey="Stream key is missing.\n\nOpen settings
 ## Pre-Live Wizard and Settings
 Basic.Settings.Stream.PreLiveWizard.RunNow="Check stream settings"
 PreLiveWizard.Title="Verify Stream Settings"
-PreLiveWizard.Prompt.Title="Verify stream settings before stream?"
+PreLiveWizard.Prompt.Title="Verify stream settings before stream"
 PreLiveWizard.Prompt.Subtitle.Default="The streaming wizard suggests the most up-to-date settings to improve your stream’s reliability, quality, and latency. \n\nSelect the resolution to stream to your account:"
 PreLiveWizard.Prompt.Subtitle.FB="Your destination is set to Facebook Live."
 PreLiveWizard.Prompt.Explainer="The Streaming wizard suggests the most up-to-date settings to improve your stream’s reliability, quality, and latency."
@@ -727,8 +727,9 @@ PreLiveWizard.Configure.ServiceNotAvailable.Description="The service selected in
 PreLiveWizard.Configure.Error.Url="Settings setup failed. Query: "
 PreLiveWizard.Configure.Error.JsonParse="Problem with server response"
 PreLiveWizard.Configure.Error.JsonParse.Description="Wizard is unavailble at the moment."
-PreLiveWizard.Selection.Title="Settings Suggested"
-PreLiveWizard.Selection.Description="Suggested video settings for your best stream."
+PreLiveWizard.Configure.Error.NoData="No new settings recieved."
+PreLiveWizard.Selection.Title="Suggested Settings"
+PreLiveWizard.Selection.Description="Suggested video settings for your best stream:"
 PreLiveWizard.Completed.Title="Encoder configured"
 PreLiveWizard.Completed.BodyText="Applied suggested settings and encoder is setup to stream. You can now close the wizard."
 PreLiveWizard.Completed.FacebookOnly="To finish going live go to Facebook Live:"

UI/pre-stream-wizard/page-loading.cpp

@@ -3,6 +3,7 @@
 #include <QSpacerItem>
 #include <QVBoxLayout>
 #include <QTimer>
+#include <QList>
 
 #include "obs-app.hpp"
 
@@ -13,6 +14,10 @@ LoadingPage::LoadingPage(QWidget *parent) : QWizardPage(parent)
 	setTitle(QTStr("PreLiveWizard.Loading.Title"));
 	setCommitPage(true);
 
+	timer_ = new QTimer(this);
+	connect(timer_, &QTimer::timeout, this, &LoadingPage::tick);
+	timer_->setSingleShot(false);
+
 	labels_.append(QTStr("Loading"));
 	labels_.append(QTStr("Loading") + ".");
 	labels_.append(QTStr("Loading") + "." + ".");
@@ -27,12 +32,7 @@ LoadingPage::LoadingPage(QWidget *parent) : QWizardPage(parent)
 
 void LoadingPage::initializePage()
 {
-	if (timer_ == nullptr) {
-		timer_ = new QTimer(this);
-		connect(timer_, &QTimer::timeout, this, &LoadingPage::tick);
-	}
-	timer_->setSingleShot(false);
-	timer_->start(500);
+	timer_->start(300);
 }
 void LoadingPage::cleanupPage()
 {

UI/pre-stream-wizard/page-start-prompt.cpp

@@ -23,12 +23,6 @@ StartPage::StartPage(Destination dest, LaunchContext launchContext,
 
 	setTitle(QTStr("PreLiveWizard.Prompt.Title"));
 
-	if (destination_ == Destination::Facebook) {
-		setSubTitle(QTStr("PreLiveWizard.Prompt.Subtitle.FB"));
-	} else {
-		setSubTitle(QTStr("PreLiveWizard.Prompt.Subtitle.Default"));
-	}
-
 	createLayout();
 	connectRadioButtons();
 

UI/pre-stream-wizard/pre-stream-wizard.cpp

@@ -4,6 +4,7 @@
 #include <QFormLayout>
 #include <QLabel>
 #include <QSize>
+#include <QList>
 
 #include "obs-app.hpp"
 #include "encoder-settings-provider-facebook.hpp"
@@ -38,6 +39,8 @@ PreStreamWizard::PreStreamWizard(
 
 	setWizardStyle(QWizard::ModernStyle);
 	setWindowTitle(QTStr("PreLiveWizard.Title"));
+	setOption(QWizard::NoBackButtonOnStartPage, true);
+	setOption(QWizard::NoBackButtonOnLastPage, true);
 
 	// First Page: Explain to the user and confirm sending to API
 	QSize currentRes(currentSettings_->videoWidth,
@@ -61,6 +64,7 @@ PreStreamWizard::PreStreamWizard(
 		new CompletedPage(destination_, launchContext_, this);
 	setPage(Page_Complete, completedPage);
 
+	// Add error page shown instead of completion in failure cases
 	errorPage_ = new ErrorPage(this);
 	setPage(Page_Error, errorPage_);
 }
@@ -113,21 +117,26 @@ void PreStreamWizard::onPageChanged(int id)
 	switch (id) {
 	case Page_StartPrompt:
 		setOption(QWizard::NoCancelButton, false);
+		setButtons(NextStep);
 		break;
 
 	case Page_Loading:
 		requestSettings();
+		setButtons(CancelOnly);
 		break;
 
 	case Page_Selections:
 		selectionPage_->setSettingsMap(newSettingsMap_);
+		setButtons(CommitStep);
 		break;
 
 	case Page_Complete:
+		setButtons(FinishOnly);
 		break;
 
 	case Page_Error:
 		sendToErrorPage_ = false;
+		setButtons(FinishOnly);
 		break;
 	}
 }
@@ -137,22 +146,49 @@ int PreStreamWizard::nextId() const
 	switch (currentId()) {
 	case Page_StartPrompt:
 		return Page_Loading;
-	case Page_Loading:
-		return sendToErrorPage_ ? Page_Error : Page_Selections;
+	case Page_Loading: {
+		if (sendToErrorPage_)
+			return Page_Error;
+		if (newSettingsMap_ == nullptr || newSettingsMap_.isNull()) {
+			errorPage_->setText(
+				QTStr("PreLiveWizard.Configure.Error.NoData"),
+				QTStr("PreLiveWizard.Configure.Error.JsonParse.Description"));
+			return Page_Error;
+		}
+		return Page_Selections;
+	}
 	case Page_Selections:
 		return Page_Complete;
-		break;
 	case Page_Complete:
 		return -1;
 	case Page_Error:
 		return -1;
 	}
 
-	if (currentId() == Page_Loading) {
-	}
 	return QWizard::nextId();
 }
 
+void PreStreamWizard::setButtons(ButtonLayout layout)
+{
+	QList<QWizard::WizardButton> layoutList;
+	layoutList << QWizard::Stretch;
+	switch (layout) {
+	case NextStep:
+		layoutList << QWizard::NextButton << QWizard::CancelButton;
+		break;
+	case CommitStep:
+		layoutList << QWizard::CommitButton << QWizard::CancelButton;
+		break;
+	case CancelOnly:
+		layoutList << QWizard::CancelButton;
+		break;
+	case FinishOnly:
+		layoutList << QWizard::FinishButton;
+		break;
+	}
+	setButtonLayout(layoutList);
+}
+
 void PreStreamWizard::onUserSelectResolution(QSize newSize)
 {
 	blog(LOG_INFO, "Selected res %d x %d", newSize.width(),

UI/pre-stream-wizard/pre-stream-wizard.hpp

@@ -46,6 +46,15 @@ class PreStreamWizard : public QWizard {
 
 	void requestSettings();
 
+	// Wizard uses custom button layouts to manage user flow & aborts.
+	enum ButtonLayout {
+		NextStep,
+		CancelOnly,
+		FinishOnly,
+		CommitStep,
+	};
+	void setButtons(ButtonLayout layout);
+
 signals:
 	// User left the wizard with intention to continue streaming
 	void userSkippedWizard(void);