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/* Size Groups
*
* GtkSizeGroup provides a mechanism for grouping a number of
* widgets together so they all request the same amount of space.
* This is typically useful when you want a column of widgets to
* have the same size, but you can't use a GtkGrid widget.
*
* Note that size groups only affect the amount of space requested,
* not the size that the widgets finally receive. If you want the
* widgets in a GtkSizeGroup to actually be the same size, you need
* to pack them in such a way that they get the size they request
* and not more. For example, if you are packing your widgets
* into a table, you would not include the Gtk::FILL flag.
*/
#include <gtkmm.h>
#include <list>
class Example_SizeGroup : public Gtk::Dialog
{
public:
Example_SizeGroup();
virtual ~Example_SizeGroup();
protected:
//Signal handlers:
virtual void on_checkbutton_toggled();
typedef std::list<Glib::ustring> type_listStrings;
virtual void add_row(Gtk::Grid& grid, int row, const Glib::RefPtr<Gtk::SizeGroup>& size_group, const Glib::ustring& label_text, const std::list<Glib::ustring>& options);
virtual Gtk::ComboBoxText* create_combobox(const std::list<Glib::ustring>& strings);
virtual void on_response(int response_id);
//Member widgets:
Gtk::Frame m_Frame_Color, m_Frame_Line;
Gtk::Box m_VBox;
Gtk::Box m_HBox;
Glib::RefPtr<Gtk::SizeGroup> m_refSizeGroup;
Gtk::Grid m_Grid_Color, m_Grid_Line;
Gtk::CheckButton m_CheckButton;
};
//Called by DemoWindow;
Gtk::Window* do_sizegroup()
{
return new Example_SizeGroup();
}
Example_SizeGroup::Example_SizeGroup()
: Gtk::Dialog("Gtk::SizeGroup"),
m_Frame_Color("Color Options"),
m_Frame_Line("Line Options"),
m_VBox(Gtk::ORIENTATION_VERTICAL, 5),
m_HBox(Gtk::ORIENTATION_HORIZONTAL, 5),
m_CheckButton("_Enable grouping", true)
{
set_resizable(false);
add_button("_Close", Gtk::RESPONSE_CLOSE);
get_content_area()->pack_start(m_VBox);
m_VBox.set_border_width(5);
m_refSizeGroup = Gtk::SizeGroup::create(Gtk::SIZE_GROUP_HORIZONTAL),
/* Create one frame holding color options
*/
m_VBox.pack_start(m_Frame_Color);
m_Grid_Color.set_border_width(5);
m_Grid_Color.set_row_spacing(5);
m_Grid_Color.set_column_spacing(10);
m_Frame_Color.add(m_Grid_Color);
type_listStrings color_options;
color_options.push_back("Red");
color_options.push_back("Green");
color_options.push_back("Blue");
add_row(m_Grid_Color, 0, m_refSizeGroup, "_Foreground", color_options);
add_row(m_Grid_Color, 1, m_refSizeGroup, "_Background", color_options);
/* And another frame holding line style options
*/
m_VBox.pack_start(m_Frame_Line, Gtk::PACK_SHRINK);
m_Grid_Line.set_border_width(5);
m_Grid_Line.set_row_spacing(5);
m_Grid_Line.set_column_spacing(10);
m_Frame_Line.add(m_Grid_Line);
type_listStrings dash_options;
dash_options.push_back("Solid");
dash_options.push_back("Dashed");
dash_options.push_back("Dotted");
add_row(m_Grid_Line, 0, m_refSizeGroup, "_Dashing", dash_options);
type_listStrings end_options;
end_options.push_back("Square");
end_options.push_back("Round");
end_options.push_back("Arrow");
add_row(m_Grid_Line, 1, m_refSizeGroup, "_Line ends", end_options);
/* And a check button to turn grouping on and off */
m_VBox.pack_start(m_CheckButton, Gtk::PACK_SHRINK);
m_CheckButton.set_active();
m_CheckButton.signal_toggled().connect(sigc::mem_fun(*this, &Example_SizeGroup::on_checkbutton_toggled));
show_all();
}
Example_SizeGroup::~Example_SizeGroup()
{
}
void Example_SizeGroup::on_checkbutton_toggled()
{
Gtk::SizeGroupMode new_mode = Gtk::SIZE_GROUP_HORIZONTAL;
if(m_CheckButton.get_active())
new_mode = Gtk::SIZE_GROUP_HORIZONTAL;
else
new_mode = Gtk::SIZE_GROUP_NONE;
m_refSizeGroup->set_mode(new_mode);
}
void Example_SizeGroup::add_row(Gtk::Grid& grid, int row,
const Glib::RefPtr<Gtk::SizeGroup>& size_group,
const Glib::ustring& label_text,
const std::list<Glib::ustring>& options)
{
Gtk::Label* pLabel = Gtk::manage(new Gtk::Label(label_text, Gtk::ALIGN_START, Gtk::ALIGN_END, true));
grid.attach(*pLabel, 0, row, 1, 1);
pLabel->set_hexpand();
Gtk::ComboBoxText* pComboBoxText = create_combobox(options);
pLabel->set_mnemonic_widget(*pComboBoxText);
size_group->add_widget(*pComboBoxText);
grid.attach(*pComboBoxText, 1, row, 1, 1);
}
/* Convenience function to create an option menu holding a number of strings
*/
Gtk::ComboBoxText* Example_SizeGroup::create_combobox(const std::list<Glib::ustring>& strings)
{
Gtk::ComboBoxText* pCombo = Gtk::manage( new Gtk::ComboBoxText() );
for(type_listStrings::const_iterator iter = strings.begin(); iter != strings.end(); iter++)
{
pCombo->append(*iter);
}
return pCombo;
}
void Example_SizeGroup::on_response(int)
{
hide();
}
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