Qt: Add about dialog

src/duckstation-qt/aboutdialog.cpp

@@ -0,0 +1,17 @@
+#include "aboutdialog.h"
+#include "qtutils.h"
+#include "scmversion/scmversion.h"
+#include <QtCore/QString>
+#include <QtWidgets/QDialog>
+
+AboutDialog::AboutDialog(QWidget* parent /* = nullptr */) : QDialog(parent)
+{
+  m_ui.setupUi(this);
+
+  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+  setFixedSize(geometry().width(), geometry().height());
+
+  m_ui.scmversion->setText(tr("%1 (%2)").arg(QString(g_scm_tag_str)).arg(QString(g_scm_branch_str)));
+}
+
+AboutDialog::~AboutDialog() = default;