File: example_panes.cc

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gtkmm3.0 3.24.0-2
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/* Paned Widgets
 *
 * The GtkHPaned and GtkVPaned Widgets divide their content
 * area into two panes with a divider in between that the
 * user can adjust. A separate child is placed into each
 * pane.
 *
 * There are a number of options that can be set for each pane.
 * This test contains both a horizontal (HPaned) and a vertical
 * (VPaned) widget, and allows you to adjust the options for
 * each side of each widget.
 */

#include <gtkmm.h>

namespace
{

class Example_Panes : public Gtk::Window
{
public:
  Example_Panes();
  ~Example_Panes() override;
};

class PaneOptions : public Gtk::Frame
{
public:
  PaneOptions(Gtk::Paned& paned, const Glib::ustring& frame_label,
              const Glib::ustring& label1, const Glib::ustring& label2);
  ~PaneOptions() override;

private:
  // member widgets:
  Gtk::Paned*      m_pPaned;
  Gtk::CheckButton m_CheckButton_resize1;
  Gtk::CheckButton m_CheckButton_shrink1;
  Gtk::CheckButton m_CheckButton_resize2;
  Gtk::CheckButton m_CheckButton_shrink2;

  // signal handlers:
  void on_checkbutton1();
  void on_checkbutton2();
};


Example_Panes::Example_Panes()
{
  set_title("Panes");
  set_border_width(0);

  Gtk::Box *const pVBox = new Gtk::Box(Gtk::ORIENTATION_VERTICAL);
  add(*Gtk::manage(pVBox));

  Gtk::Paned *const pVPaned = new Gtk::Paned(Gtk::ORIENTATION_VERTICAL);
  pVBox->pack_start(*Gtk::manage(pVPaned));
  pVPaned->set_border_width(5);

  Gtk::Paned *const pHPaned = new Gtk::Paned(Gtk::ORIENTATION_HORIZONTAL);
  pVPaned->add1(*Gtk::manage(pHPaned));

  Gtk::Frame *const pFrame1 = new Gtk::Frame();
  pHPaned->add1(*Gtk::manage(pFrame1));
  pFrame1->set_shadow_type(Gtk::SHADOW_IN);
  pFrame1->set_size_request(60, 60);
  pFrame1->add(*Gtk::make_managed<Gtk::Button>("_Hi there", true));

  Gtk::Frame *const pFrame2 = new Gtk::Frame();
  pHPaned->add2(*Gtk::manage(pFrame2));
  pFrame2->set_shadow_type(Gtk::SHADOW_IN);
  pFrame2->set_size_request(80, 60);

  Gtk::Frame *const pFrame3 = new Gtk::Frame();
  pVPaned->add2(*Gtk::manage(pFrame3));
  pFrame3->set_shadow_type(Gtk::SHADOW_IN);
  pFrame3->set_size_request(60, 80);

  // Now create check buttons to control sizing
  pVBox->pack_start(*Gtk::make_managed<PaneOptions>(*pHPaned, "Horizontal", "Left", "Right"), Gtk::PACK_SHRINK);
  pVBox->pack_start(*Gtk::make_managed<PaneOptions>(*pVPaned, "Vertical", "Top", "Bottom"),   Gtk::PACK_SHRINK);

  show_all();
}

Example_Panes::~Example_Panes()
{}


PaneOptions::PaneOptions(Gtk::Paned& paned, const Glib::ustring& frame_label,
                         const Glib::ustring& label1, const Glib::ustring& label2)
:
  Gtk::Frame            (frame_label),
  m_pPaned              (&paned),
  m_CheckButton_resize1 ("_Resize", true),
  m_CheckButton_shrink1 ("_Shrink", true),
  m_CheckButton_resize2 ("_Resize", true),
  m_CheckButton_shrink2 ("_Shrink", true)
{
  set_border_width(4);

  Gtk::Grid *const pGrid = new Gtk::Grid();
  add(*Gtk::manage(pGrid));

  pGrid->attach(*Gtk::make_managed<Gtk::Label>(label1), 0, 0, 1, 1);
  pGrid->attach(*Gtk::make_managed<Gtk::Label>(label2), 1, 0, 1, 1);

  pGrid->attach(m_CheckButton_resize1, 0, 1, 1, 1);
  pGrid->attach(m_CheckButton_shrink1, 0, 2, 1, 1);
  pGrid->attach(m_CheckButton_resize2, 1, 1, 1, 1);
  pGrid->attach(m_CheckButton_shrink2, 1, 2, 1, 1);

  m_CheckButton_resize1.set_active(false);
  m_CheckButton_shrink1.set_active(true);
  m_CheckButton_resize2.set_active(true);
  m_CheckButton_shrink2.set_active(true);

  m_CheckButton_resize1.signal_toggled().connect(sigc::mem_fun(*this, &PaneOptions::on_checkbutton1));
  m_CheckButton_shrink1.signal_toggled().connect(sigc::mem_fun(*this, &PaneOptions::on_checkbutton1));
  m_CheckButton_resize2.signal_toggled().connect(sigc::mem_fun(*this, &PaneOptions::on_checkbutton2));
  m_CheckButton_shrink2.signal_toggled().connect(sigc::mem_fun(*this, &PaneOptions::on_checkbutton2));

  // Sync Gtk::Paned options with the CheckButtons' state.  Actually, the
  // preset state of the buttons should match the Gtk::Paned default settings,
  // but it is definitely cleaner this way.
  on_checkbutton1();
  on_checkbutton2();
}

PaneOptions::~PaneOptions()
{}

void PaneOptions::on_checkbutton1()
{
  Gtk::AttachOptions options = Gtk::AttachOptions(0);

  if(m_CheckButton_resize1.get_active()) options = (options | Gtk::EXPAND);
  if(m_CheckButton_shrink1.get_active()) options = (options | Gtk::SHRINK);

  Gtk::Widget *const pChild = m_pPaned->get_child1();

  m_pPaned->remove(*pChild);
  m_pPaned->pack1(*pChild, options);
}

void PaneOptions::on_checkbutton2()
{
  Gtk::AttachOptions options = Gtk::AttachOptions(0);

  if(m_CheckButton_resize2.get_active()) options = (options | Gtk::EXPAND);
  if(m_CheckButton_shrink2.get_active()) options = (options | Gtk::SHRINK);

  Gtk::Widget *const pChild = m_pPaned->get_child2();

  m_pPaned->remove(*pChild);
  m_pPaned->pack2(*pChild, options);
}

} // anonymous namespace


// called by DemoWindow
Gtk::Window* do_panes()
{
  return new Example_Panes();
}