diff --git a/src/main.cpp b/src/main.cpp
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -26,7 +26,13 @@
 
 // test code
 #include <QTableView>
+#include <QSpinBox>
+#include <QColorDialog>
 #include "channelinfomodel.h"
+#include "utils.h"
+
+#include "color_selector.hpp"
+#include "color_dialog.hpp"
 
 MainWindow* pMainWindow;
 
@@ -55,16 +61,42 @@ int main(int argc, char *argv[])
     w.show();
 
     // test code
-    ChannelInfoModel cim(10, &a);
+    ChannelInfoModel cim(2, &a);
     QTableView tv;
+    QSpinBox cb;
+
+    QObject::connect(&cb, SELECT<int>::OVERLOAD_OF(&QSpinBox::valueChanged), [&cim](int value)
+                     {
+                         cim.setNumOfChannels(value);
+                     });
 
     tv.setModel(&cim);
 
     tv.show();
+    // cb.show();
 
-    // cim.setNumOfChannels(3);
-    // cim.setNumOfChannels(10);
-    // cim.setNumOfChannels(7);
+    cim.setNumOfChannels(3);
+    cim.setNumOfChannels(7);
+    cim.setNumOfChannels(10);
+
+
+    color_widgets::ColorSelector cpicker;
+    cpicker.setColor(QColor("red"));
+    cpicker.show();
+
+    QObject::connect(tv.selectionModel(), &QItemSelectionModel::currentRowChanged,
+                     [&cim, &cpicker](const QModelIndex &current, const QModelIndex &previous)
+                     {
+                         cpicker.setColor(cim.data(current, Qt::ForegroundRole).value<QColor>());
+                     });
+
+    QObject::connect(&cpicker, &color_widgets::ColorSelector::colorChanged,
+                     [&cim, &tv](QColor color)
+                     {
+                         auto index = tv.selectionModel()->currentIndex();
+                         index = index.sibling(index.row(), 0);
+                         cim.setData(index, color, Qt::ForegroundRole);
+                     });
 
     return a.exec();
 }