sweeping vfx rewrite

ui/fontcombobox.cpp

@@ -0,0 +1,22 @@
+#include "fontcombobox.h"
+
+#include <QFontDatabase>
+
+FontCombobox::FontCombobox(QWidget* parent) : ComboBoxEx(parent) {
+	addItem(QFont().family());
+}
+
+void FontCombobox::showPopup() {
+	QString current = currentText();
+	clear();
+	QStringList fonts = QFontDatabase().families();
+	bool found = false;
+	for (int i=0;i<fonts.size();i++) {
+		addItem(fonts.at(i));
+		if (!found && fonts.at(i) == current) {
+			setCurrentIndex(i);
+			found = true;
+		}
+	}
+	QComboBox::showPopup();
+}