diff --git a/CMakeLists.txt b/CMakeLists.txt
index 83486603..54b4c129 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,7 +70,7 @@ if (NOT Boost_PYTHON_FOUND )
 endif ()
 include(gui/gui.cmake)
 
-include_directories(common/ gui/ frontend/json ${Boost_INCLUDE_DIRS} ${PYTHON_INCLUDE_DIRS})
+include_directories(common/ gui/ frontend/json ${Boost_INCLUDE_DIRS} ${PYTHON_INCLUDE_DIRS} 3rdparty/QtPropertyBrowser/src)
 aux_source_directory(common/ COMMON_SRC_FILES)
 aux_source_directory(frontend/json/ JSON_PARSER_FILES)
 set(COMMON_FILES ${COMMON_SRC_FILES} ${JSON_PARSER_FILES})
diff --git a/gui/gui.cmake b/gui/gui.cmake
index 95a4a397..23f955f9 100644
--- a/gui/gui.cmake
+++ b/gui/gui.cmake
@@ -22,7 +22,7 @@ qt5_wrap_ui_custom(GENERATED_UI_HEADERS ${UI_SOURCES})
 qt5_add_resources_custom(GUI_RESOURCE_FILES gui/nextpnr.qrc)
 
 set(GUI_SOURCE_FILES gui/mainwindow.cc gui/fpgaviewwidget.cc gui/emb.cc ${GENERATED_MOC_FILES} ${GENERATED_UI_HEADERS} ${GUI_RESOURCE_FILES})
-set(GUI_LIBRARY_FILES Qt5::Widgets Qt5::OpenGL ${OPENGL_LIBRARIES})
+set(GUI_LIBRARY_FILES Qt5::Widgets Qt5::OpenGL ${OPENGL_LIBRARIES} QtPropertyBrowser)
 
 
 add_library(QtPropertyBrowser STATIC "")
@@ -33,6 +33,7 @@ qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qtpropertymanager.h ${CMAKE_CURR
 qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qtbuttonpropertybrowser.h ${CMAKE_CURRENT_BINARY_DIR}/generated/moc_qtbuttonpropertybrowser.hpp)
 qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qteditorfactory.h ${CMAKE_CURRENT_BINARY_DIR}/generated/moc_qteditorfactory.hpp)
 qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.h ${CMAKE_CURRENT_BINARY_DIR}/generated/moc_qttreepropertybrowser.hpp)
+qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qtpropertybrowserutils_p.h ${CMAKE_CURRENT_BINARY_DIR}/generated/moc_qtpropertybrowserutils_p.cpp)
 
 qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qtpropertymanager.cpp ${CMAKE_CURRENT_BINARY_DIR}/generated/qtpropertymanager.moc)
 qt5_generate_moc(3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp ${CMAKE_CURRENT_BINARY_DIR}/generated/qttreepropertybrowser.moc)
@@ -49,10 +50,12 @@ set(QTPB_GENERATED_MOC_FILES
     ${CMAKE_CURRENT_BINARY_DIR}/generated/qtpropertymanager.moc
     ${CMAKE_CURRENT_BINARY_DIR}/generated/qttreepropertybrowser.moc
     ${CMAKE_CURRENT_BINARY_DIR}/generated/qteditorfactory.moc
+    ${CMAKE_CURRENT_BINARY_DIR}/generated/moc_qtpropertybrowserutils_p.cpp
 )
 
+qt5_add_resources_custom(QTPB_RESOURCE_FILES 3rdparty/QtPropertyBrowser/src/qtpropertybrowser.qrc)
 aux_source_directory(3rdparty/QtPropertyBrowser/src/ QTPROPBROWSER_SRC_ALL)
-target_sources(QtPropertyBrowser PRIVATE ${QTPROPBROWSER_SRC_ALL} ${QTPB_GENERATED_MOC_FILES} )
+target_sources(QtPropertyBrowser PRIVATE ${QTPROPBROWSER_SRC_ALL} ${QTPB_GENERATED_MOC_FILES} ${QTPB_RESOURCE_FILES})
 target_include_directories(QtPropertyBrowser PRIVATE 3rdparty/QtPropertyBrowser/src generated)
-target_link_libraries(QtPropertyBrowser PRIVATE Qt5::Widgets)
+target_link_libraries(QtPropertyBrowser PRIVATE Qt5::Core Qt5::Widgets)
 
diff --git a/gui/mainwindow.cc b/gui/mainwindow.cc
index 52174139..b24fb58b 100644
--- a/gui/mainwindow.cc
+++ b/gui/mainwindow.cc
@@ -5,6 +5,12 @@
 #include "emb.h"
 #include "pybindings.h"
 #include "ui_mainwindow.h"
+#include "qtpropertymanager.h"
+#include "qtvariantproperty.h"
+#include "qttreepropertybrowser.h"
+
+#include <QDate>
+#include <QLocale>
 
 MainWindow::MainWindow(Design *_design, QWidget *parent)
         : QMainWindow(parent), ui(new Ui::MainWindow), design(_design)
@@ -20,9 +26,137 @@ MainWindow::MainWindow(Design *_design, QWidget *parent)
     emb::set_stdout(write);
     std::string title = "nextpnr-ice40 - " + design->chip.getChipName();
     setWindowTitle(title.c_str());
+        QtVariantPropertyManager *variantManager = new QtVariantPropertyManager();
+
+    int i = 0;
+    QtProperty *topItem = variantManager->addProperty(QtVariantPropertyManager::groupTypeId(),
+                QString::number(i++) + QLatin1String(" Group Property"));
+
+    QtVariantProperty *item = variantManager->addProperty(QVariant::Bool, QString::number(i++) + QLatin1String(" Bool Property"));
+    item->setValue(true);
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Int, QString::number(i++) + QLatin1String(" Int Property"));
+    item->setValue(20);
+    item->setAttribute(QLatin1String("minimum"), 0);
+    item->setAttribute(QLatin1String("maximum"), 100);
+    item->setAttribute(QLatin1String("singleStep"), 10);
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Double, QString::number(i++) + QLatin1String(" Double Property"));
+    item->setValue(1.2345);
+    item->setAttribute(QLatin1String("singleStep"), 0.1);
+    item->setAttribute(QLatin1String("decimals"), 3);
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::String, QString::number(i++) + QLatin1String(" String Property"));
+    item->setValue("Value");
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Date, QString::number(i++) + QLatin1String(" Date Property"));
+    item->setValue(QDate::currentDate().addDays(2));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Time, QString::number(i++) + QLatin1String(" Time Property"));
+    item->setValue(QTime::currentTime());
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::DateTime, QString::number(i++) + QLatin1String(" DateTime Property"));
+    item->setValue(QDateTime::currentDateTime());
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::KeySequence, QString::number(i++) + QLatin1String(" KeySequence Property"));
+    item->setValue(QKeySequence(Qt::ControlModifier | Qt::Key_Q));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Char, QString::number(i++) + QLatin1String(" Char Property"));
+    item->setValue(QChar(386));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Locale, QString::number(i++) + QLatin1String(" Locale Property"));
+    item->setValue(QLocale(QLocale::Polish, QLocale::Poland));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Point, QString::number(i++) + QLatin1String(" Point Property"));
+    item->setValue(QPoint(10, 10));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::PointF, QString::number(i++) + QLatin1String(" PointF Property"));
+    item->setValue(QPointF(1.2345, -1.23451));
+    item->setAttribute(QLatin1String("decimals"), 3);
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Size, QString::number(i++) + QLatin1String(" Size Property"));
+    item->setValue(QSize(20, 20));
+    item->setAttribute(QLatin1String("minimum"), QSize(10, 10));
+    item->setAttribute(QLatin1String("maximum"), QSize(30, 30));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::SizeF, QString::number(i++) + QLatin1String(" SizeF Property"));
+    item->setValue(QSizeF(1.2345, 1.2345));
+    item->setAttribute(QLatin1String("decimals"), 3);
+    item->setAttribute(QLatin1String("minimum"), QSizeF(0.12, 0.34));
+    item->setAttribute(QLatin1String("maximum"), QSizeF(20.56, 20.78));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Rect, QString::number(i++) + QLatin1String(" Rect Property"));
+    item->setValue(QRect(10, 10, 20, 20));
+    topItem->addSubProperty(item);
+    item->setAttribute(QLatin1String("constraint"), QRect(0, 0, 50, 50));
+
+    item = variantManager->addProperty(QVariant::RectF, QString::number(i++) + QLatin1String(" RectF Property"));
+    item->setValue(QRectF(1.2345, 1.2345, 1.2345, 1.2345));
+    topItem->addSubProperty(item);
+    item->setAttribute(QLatin1String("constraint"), QRectF(0, 0, 50, 50));
+    item->setAttribute(QLatin1String("decimals"), 3);
+
+    item = variantManager->addProperty(QtVariantPropertyManager::enumTypeId(),
+                    QString::number(i++) + QLatin1String(" Enum Property"));
+    QStringList enumNames;
+    enumNames << "Enum0" << "Enum1" << "Enum2";
+    item->setAttribute(QLatin1String("enumNames"), enumNames);
+    item->setValue(1);
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QtVariantPropertyManager::flagTypeId(),
+                    QString::number(i++) + QLatin1String(" Flag Property"));
+    QStringList flagNames;
+    flagNames << "Flag0" << "Flag1" << "Flag2";
+    item->setAttribute(QLatin1String("flagNames"), flagNames);
+    item->setValue(5);
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::SizePolicy, QString::number(i++) + QLatin1String(" SizePolicy Property"));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Font, QString::number(i++) + QLatin1String(" Font Property"));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Cursor, QString::number(i++) + QLatin1String(" Cursor Property"));
+    topItem->addSubProperty(item);
+
+    item = variantManager->addProperty(QVariant::Color, QString::number(i++) + QLatin1String(" Color Property"));
+    topItem->addSubProperty(item);
+
+    QtVariantEditorFactory *variantFactory = new QtVariantEditorFactory();
+
+    QtTreePropertyBrowser *variantEditor = new QtTreePropertyBrowser();
+    variantEditor->setFactoryForManager(variantManager, variantFactory);
+    variantEditor->addProperty(topItem);
+    variantEditor->setPropertiesWithoutValueMarked(true);
+    variantEditor->setRootIsDecorated(false);
+    variantEditor->show();
+    ui->splitter_2->addWidget(variantEditor);
 }
 
-MainWindow::~MainWindow() { delete ui; }
+MainWindow::~MainWindow() 
+{ 
+    
+    //delete variantManager;
+    //delete variantFactory;
+    //delete variantEditor;
+delete ui; 
+}
 
 void handle_system_exit() { exit(-1); }
 
diff --git a/gui/mainwindow.ui b/gui/mainwindow.ui
index 4e236f3c..3fe0f400 100644
--- a/gui/mainwindow.ui
+++ b/gui/mainwindow.ui
@@ -63,22 +63,21 @@
       <widget class="QSplitter" name="splitter_2">
        <property name="orientation">
         <enum>Qt::Vertical</enum>
-       </property>
+       </property>       
        <widget class="QTreeView" name="treeView">
         <property name="minimumSize">
          <size>
-          <width>200</width>
+          <width>300</width>
           <height>0</height>
          </size>
         </property>
         <property name="maximumSize">
          <size>
-          <width>200</width>
+          <width>300</width>
           <height>16777215</height>
          </size>
         </property>
        </widget>
-       <widget class="QTableView" name="tableView"/>
       </widget>
      </widget>
     </item>