Following a recent post about Gtk::Button and changing its state to
depressed and redrawing with different colours, I wrote the code as
below. I can initially set the colour when creating the button, but
I don't seem to be able to change its colour later - see set_color().
Any ideas on how I can force the button to redraw itself with new color?
Thanks.
#include <iostream>
#include <gtkmm.h>
namespace Gtk
{
class DepressedToggleButton : public Gtk::ToggleButton
{
public:
DepressedToggleButton() : color(Gdk::Color("grey")) {}
DepressedToggleButton(Gdk::Color c) : color(c) {}
~DepressedToggleButton() {}
void set_color(Gdk::Color c)
{
color = c;
modify_bg(Gtk::STATE_INSENSITIVE, color);
queue_draw(); // need to force the button to
redraw with new color - HOW?!? }
Gdk::Color get_color()
{
return color;
}
protected:
virtual bool on_expose_event(GdkEventExpose* event);
Gdk::Color color;
};
bool DepressedToggleButton::on_expose_event(GdkEventExpose*
event) {
modify_bg(Gtk::STATE_INSENSITIVE, color);
return Gtk::Widget::on_expose_event(event);
}
}
class TestButton : public Gtk::Window
{
public:
TestButton();
~TestButton();
protected:
void HandleButton(int i);
Gtk::VBox m_VBox;
Gtk::HButtonBox m_HButtonBox;
Gtk::DepressedToggleButton m_DepressedToggleButton[3];
private:
bool state;
};
TestButton::TestButton() :
state(false)
{
set_title("DepressedToggleButton");
add(m_VBox);
m_HButtonBox.set_border_width(5);
m_HButtonBox.set_layout(Gtk::BUTTONBOX_END);
m_HButtonBox.set_spacing(5);
m_DepressedToggleButton[0].set_label("First");
m_DepressedToggleButton[0].set_color(Gdk::Color("red"));
m_DepressedToggleButton[1].set_label("Second");
m_DepressedToggleButton[1].set_color(Gdk::Color("blue"));
m_DepressedToggleButton[2].set_label("Third");
m_DepressedToggleButton[2].set_color(Gdk::Color("green"));
for (int i = 0; i < 3; i++)
{
m_DepressedToggleButton[i].signal_clicked().connect(
sigc::bind<int>(sigc::mem_fun(*this,
&TestButton::HandleButton), i)); m_HButtonBox.add
(m_DepressedToggleButton[i]); }
m_VBox.pack_start(m_HButtonBox, Gtk::BUTTONBOX_END, 0);
set_resizable(false);
show_all_children();
}
TestButton::~TestButton()
{
}
int main(int argc, char *argv[])
{
Gtk::Main app(argc, argv);
TestButton test;
Gtk::Main::run(test);
return 0;
}
void TestButton::HandleButton(int i)
{
std::cout << "Button " << i << " clicked!\n";
}
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