Add option to change to a custom WINE prefix

src/settingswindow.cpp

@@ -78,6 +78,25 @@ SettingsWindow::SettingsWindow(LauncherWindow& window, QWidget* parent) : window
         winePathLabel->setText(this->window.winePath);
     });
 
+    auto winePrefixDirectory = new QLabel(window.winePrefixPath);
+    winePrefixDirectory->setWordWrap(true);
+    wineBoxLayout->addRow("Wine Prefix", winePrefixDirectory);
+
+    auto selectPrefixButton = new QPushButton("Select Wine Prefix");
+    connect(selectPrefixButton, &QPushButton::pressed, [this, winePrefixDirectory] {
+        this->window.winePrefixPath = QFileDialog::getExistingDirectory(this, "Open Wine Prefix");
+        winePrefixDirectory->setText(this->window.winePrefixPath);
+
+        this->window.readInitialInformation();
+    });
+    wineBoxLayout->addWidget(selectPrefixButton);
+
+    auto openPrefixButton = new QPushButton("Open Wine Prefix");
+    connect(openPrefixButton, &QPushButton::pressed, [this] {
+        openPath(this->window.winePrefixPath);
+    });
+    wineBoxLayout->addWidget(openPrefixButton);
+
     auto enableDXVKhud = new QCheckBox("Enable DXVK HUD");
     enableDXVKhud->setChecked(window.enableDXVKhud);
     wineBoxLayout->addWidget(enableDXVKhud);
@@ -147,14 +166,18 @@ SettingsWindow::SettingsWindow(LauncherWindow& window, QWidget* parent) : window
 
     auto gameDirectoryButton = new QPushButton("Open Game Directory");
     connect(gameDirectoryButton, &QPushButton::pressed, [this] {
-#if defined(Q_OS_WIN)
+        openPath(this->window.gamePath);
-        // for some reason, windows requires special treatment (what else is new?)
-        const QFileInfo fileInfo(this->window.gamePath);
-
-        QProcess::startDetached("explorer.exe", QStringList(QDir::toNativeSeparators(fileInfo.canonicalFilePath())));
-#else
-        QDesktopServices::openUrl("file://" + this->window.gamePath);
-#endif
     });
     layout->addWidget(gameDirectoryButton);
 }
+
+void SettingsWindow::openPath(const QString path) {
+#if defined(Q_OS_WIN)
+    // for some reason, windows requires special treatment (what else is new?)
+        const QFileInfo fileInfo(path);
+
+        QProcess::startDetached("explorer.exe", QStringList(QDir::toNativeSeparators(fileInfo.canonicalFilePath())));
+#else
+    QDesktopServices::openUrl("file://" + path);
+#endif
+}

src/settingswindow.h

@@ -9,5 +9,7 @@ public:
     SettingsWindow(LauncherWindow& window, QWidget* parent = nullptr);
 
 private:
+    void openPath(const QString path);
+
     LauncherWindow& window;
 };

src/xivlauncher.cpp

@@ -89,13 +89,15 @@ void LauncherWindow::launchExecutable(const QStringList args) {
     }
 #endif
 
-#if defined(Q_OS_MACOS) || defined(Q_OS_LINUX)
+#if defined(Q_OS_MAC) || defined(Q_OS_LINUX)
-    arguments.push_back(winePath);
+    env << "WINEPREFIX=" + winePrefixPath;
-#endif
 
     if(enableDXVKhud)
         env << "DXVK_HUD=full";
 
+    arguments.push_back(winePath);
+#endif
+
     arguments.append(args);
 
     auto executable = arguments[0];
@@ -156,6 +158,18 @@ void LauncherWindow::readInitialInformation() {
 #endif
     }
 
+    if(settings.contains("winePrefix") && settings.value("winePrefix").canConvert<QString>() && !settings.value("winePrefix").toString().isEmpty()) {
+        winePrefixPath = settings.value("winePrefix").toString();
+    } else {
+#if defined(Q_OS_MACOS)
+        winePrefixPath = QDir::homePath() + "/Library/Application Support/FINAL FANTASY XIV ONLINE/Bottles/published_Final_Fantasy";
+#endif
+
+#if defined(Q_OS_LINUX)
+        winePrefixPath = QDir::homePath() + "/.wine";
+#endif
+    }
+
     bootVersion = readVersion(gamePath + "/boot/ffxivboot.ver");
     gameVersion = readVersion(gamePath + "/game/ffxivgame.ver");
 
@@ -298,6 +312,7 @@ LauncherWindow::LauncherWindow(QWidget* parent) :
         auto info = LoginInformation{usernameEdit->text(), passwordEdit->text(), otpEdit->text()};
 
         settings.setValue("gamePath", gamePath);
+        settings.setValue("winePrefix", winePrefixPath);
 
         settings.setValue("rememberUsername", rememberUsernameBox->checkState() == Qt::CheckState::Checked);
         if(rememberUsernameBox->checkState() == Qt::CheckState::Checked) {

src/xivlauncher.h

@@ -32,7 +32,7 @@ public:
     QNetworkAccessManager* mgr;
 
     int language = 1; // 1 is english, thats all i know
-    QString gamePath, winePath;
+    QString gamePath, winePath, winePrefixPath;
     QString bootVersion, gameVersion;
 
     bool useEsync, useGamescope, useGamemode;