Show changelog even when there are no new updates available.

gui/MainWindow.cpp

@@ -305,12 +305,8 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWi
 		auto updater = MMC->updateChecker();
 		connect(updater.get(), &UpdateChecker::updateAvailable, this,
 				&MainWindow::updateAvailable);
-		connect(updater.get(), &UpdateChecker::noUpdateFound, [this]()
-		{
-			CustomMessageBox::selectable(
-				this, tr("No update found."),
-				tr("No MultiMC update was found!\nYou are using the latest version."))->exec();
-		});
+		connect(updater.get(), &UpdateChecker::noUpdateFound, this,
+				&MainWindow::updateNotAvailable);
 		// if automatic update checks are allowed, start one.
 		if (MMC->settings()->get("AutoUpdate").toBool())
 			on_actionCheckUpdate_triggered();
@@ -621,6 +617,12 @@ void MainWindow::updateAvailable(QString repo, QString versionName, int versionI
 	}
 }
 
+void MainWindow::updateNotAvailable()
+{
+	UpdateDialog dlg(false);
+	dlg.exec();
+}
+
 QList<int> stringToIntList(const QString &string)
 {
 	QStringList split = string.split(',', QString::SkipEmptyParts);

gui/MainWindow.h

@@ -154,6 +154,8 @@ slots:
 
 	void updateAvailable(QString repo, QString versionName, int versionId);
 
+	void updateNotAvailable();
+
 	void notificationsChanged();
 
 	void activeAccountChanged();

gui/dialogs/SettingsDialog.cpp

@@ -73,7 +73,7 @@ SettingsDialog::SettingsDialog(QWidget *parent) : QDialog(parent), ui(new Ui::Se
 	}
 	else
 	{
-		MMC->updateChecker()->updateChanList();
+		MMC->updateChecker()->updateChanList(false);
 	}
 	connect(ui->proxyGroup, SIGNAL(buttonClicked(int)), SLOT(proxyChanged(int)));
 	ui->mceditLink->setOpenExternalLinks(true);

gui/dialogs/UpdateDialog.cpp

@@ -5,12 +5,21 @@
 #include "MultiMC.h"
 #include <logic/settings/SettingsObject.h>
 
-UpdateDialog::UpdateDialog(QWidget *parent) : QDialog(parent), ui(new Ui::UpdateDialog)
+UpdateDialog::UpdateDialog(bool hasUpdate, QWidget *parent) : QDialog(parent), ui(new Ui::UpdateDialog)
 {
 	MultiMCPlatform::fixWM_CLASS(this);
 	ui->setupUi(this);
 	auto channel = MMC->settings()->get("UpdateChannel").toString();
+	if(hasUpdate)
+	{
 		ui->label->setText(tr("A new %1 update is available!").arg(channel));
+	}
+	else
+	{
+		ui->label->setText(tr("No %1 updates found. You are running the latest version.").arg(channel));
+		ui->btnUpdateNow->setDisabled(true);
+		ui->btnUpdateOnExit->setDisabled(true);
+	}
 	loadChangelog();
 }
 

gui/dialogs/UpdateDialog.h

@@ -36,7 +36,7 @@ class UpdateDialog : public QDialog
 	Q_OBJECT
 
 public:
-	explicit UpdateDialog(QWidget *parent = 0);
+	explicit UpdateDialog(bool hasUpdate = true, QWidget *parent = 0);
 	~UpdateDialog();
 
 private:

logic/updater/DownloadUpdateTask.cpp

@@ -91,7 +91,7 @@ void DownloadUpdateTask::findCurrentVersionInfo()
 
 		QObject::connect(checker.get(), &UpdateChecker::channelListLoaded, this,
 						 &DownloadUpdateTask::processChannels);
-		checker->updateChanList();
+		checker->updateChanList(false);
 	}
 	else
 	{

logic/updater/UpdateChecker.cpp

@@ -59,7 +59,7 @@ void UpdateChecker::checkForUpdate(bool notifyNoUpdate)
 		QLOG_DEBUG() << "Channel list isn't loaded yet. Loading channel list and deferring "
 						"update check.";
 		m_checkUpdateWaiting = true;
-		updateChanList();
+		updateChanList(notifyNoUpdate);
 		return;
 	}
 
@@ -170,7 +170,7 @@ void UpdateChecker::updateCheckFailed()
 	QLOG_ERROR() << "Update check failed for reasons unknown.";
 }
 
-void UpdateChecker::updateChanList()
+void UpdateChecker::updateChanList(bool notifyNoUpdate)
 {
 	QLOG_DEBUG() << "Loading the channel list.";
 
@@ -185,13 +185,14 @@ void UpdateChecker::updateChanList()
 	m_chanListLoading = true;
 	NetJob *job = new NetJob("Update System Channel List");
 	job->addNetAction(ByteArrayDownload::make(QUrl(m_channelListUrl)));
-	QObject::connect(job, &NetJob::succeeded, this, &UpdateChecker::chanListDownloadFinished);
+	connect(job, &NetJob::succeeded, [this, notifyNoUpdate]()
+	{ chanListDownloadFinished(notifyNoUpdate); });
 	QObject::connect(job, &NetJob::failed, this, &UpdateChecker::chanListDownloadFailed);
 	chanListJob.reset(job);
 	job->start();
 }
 
-void UpdateChecker::chanListDownloadFinished()
+void UpdateChecker::chanListDownloadFinished(bool notifyNoUpdate)
 {
 	QByteArray data;
 	{
@@ -250,7 +251,7 @@ void UpdateChecker::chanListDownloadFinished()
 
 	// If we're waiting to check for updates, do that now.
 	if (m_checkUpdateWaiting)
-		checkForUpdate(false);
+		checkForUpdate(notifyNoUpdate);
 
 	emit channelListLoaded();
 }

logic/updater/UpdateChecker.h

@@ -33,7 +33,7 @@ public:
 	 * Causes the update checker to download the channel list from the URL specified in config.h (generated by CMake).
 	 * If this isn't called before checkForUpdate(), it will automatically be called.
 	 */
-	void updateChanList();
+	void updateChanList(bool notifyNoUpdate);
 
 	/*!
 	 * An entry in the channel list.
@@ -70,7 +70,7 @@ private slots:
 	void updateCheckFinished(bool notifyNoUpdate);
 	void updateCheckFailed();
 
-	void chanListDownloadFinished();
+	void chanListDownloadFinished(bool notifyNoUpdate);
 	void chanListDownloadFailed();
 
 private:

tests/tst_UpdateChecker.cpp

@@ -116,7 +116,7 @@ slots:
 
 		checker.setChannelListUrl(channelUrl);
 
-		checker.updateChanList();
+		checker.updateChanList(false);
 
 		if (valid)
 		{
@@ -165,7 +165,7 @@ slots:
 		QSignalSpy channelListLoadedSpy(&checker, SIGNAL(channelListLoaded()));
 		QVERIFY(channelListLoadedSpy.isValid());
 
-		checker.updateChanList();
+		checker.updateChanList(false);
 		QVERIFY(channelListLoadedSpy.wait());
 
 		checker.m_channels[0].url = QUrl::fromLocalFile(QDir::current().absoluteFilePath("tests/data/")).toString();