Wt

#include <Wt/WApplication>

#include <Wt/WContainerWidget>

#include <Wt/WVBoxLayout>

#include <Wt/WPushButton>

#include <Wt/WBootstrapTheme>

#include <Wt/WPanel>

class CButtonWidget : public Wt::WContainerWidget

{

  public:

    CButtonWidget() : Wt::WContainerWidget() {}

    void addButton () { this->addWidget (new Wt::WPushButton("Test")); }

};

class CChooserWidget : public Wt::WContainerWidget {

  public:

    CChooserWidget() : Wt::WContainerWidget() {

      Wt::WVBoxLayout* l (new Wt::WVBoxLayout());

      this->setLayout(l);

      Wt::WPushButton* trigger (new Wt::WPushButton("Click Me"));

      l->addWidget (trigger);

      CButtonWidget* bw (new CButtonWidget());

      l->addWidget (bw);

      trigger->clicked().connect (bw,&CButtonWidget::addButton);

    }

};

class CPropertiesWidget : public Wt::WContainerWidget {

  public:

    CPropertiesWidget() : Wt::WContainerWidget() {

      Wt::WGridLayout* l (new Wt::WGridLayout());

      this->setLayout(l);

      Wt::WPanel* panel = new Wt::WPanel();

      panel->setCentralWidget(new CChooserWidget());

      panel->setCollapsible(false);

      panel->setCollapsed(false);

      panel->setTitleBar(false);

      l->addWidget (panel,0,0);

    }

};

class TestApp : public Wt::WApplication

{

  public:

    TestApp (const Wt::WEnvironment& env) : Wt::WApplication(env) {

      this->setTheme(new Wt::WBootstrapTheme(this));

      CPropertiesWidget* p (new CPropertiesWidget());

      this->root()->addWidget (p);

    }

};

Wt::WApplication* createApplication(const Wt::WEnvironment& env)

{

  return new TestApp(env);

}

int main(int argc, char *argv[])

{

  return Wt::WRun(argc, argv, &createApplication);

}