C++ Color::get_red_p方法代码示例

void GraphicalItem::setColor(const Gdk::Color& color,
    const Cairo::RefPtr<Cairo::Context>& context)
{
        context->set_source_rgb(color.get_red_p(),
        color.get_green_p(),
        color.get_blue_p());
}

void ActivityDrawingArea::setSourceRGB(Cairo::RefPtr<Cairo::Context> cr, const Gdk::Color & col) {
	double r = col.get_red_p();
	double g = col.get_green_p();
	double b = col.get_blue_p();
	//std::cout<<"ActivityDrawingArea::setSourceRGB: "<<"("<<r<<","<<g<<","<<b<<")"<<std::endl;

	cr->set_source_rgb(r, g, b);
}

void WidgetExpanderBase::onWidgetExpanderBaseChanged()
{
  Gdk::Color CurrentColor = mp_ColorButton->get_color();

  double CurrentAlpha = mp_OpacityHScale->get_value() / 100;

  int CurrentWidth = mp_WidthSpinButton->get_value();

  m_signal_WidgetExpanderBaseChanged.emit(CurrentWidth,
      CurrentColor.get_red_p(), CurrentColor.get_green_p(),
      CurrentColor.get_blue_p(), CurrentAlpha, mp_ShowIDCheckBox->get_active()/*, mp_CheckButtonGraph->get_active()*/);
}

static Gdk::Color
color_darken(Gdk::Color x, float amount)
{
	double   red = x.get_red_p()   * amount;
	double green = x.get_green_p() * amount;
	double  blue = x.get_blue_p()  * amount;

	x.set_rgb_p(  red > 1 ? 1 : red,
				green > 1 ? 1 : green,
				 blue > 1 ? 1 : blue);

	return x;
}

void CellRenderer_TimeTrack::draw_activepoint_off(
		const ::Cairo::RefPtr< ::Cairo::Context>& cr,
		Gdk::Color inactive_color,
		int line_width,
		int from_x,
		int from_y,
		int to_x,
		int to_y)
{
	std::valarray< double > activepoint_off_dashes(2);
	activepoint_off_dashes[0] = 1.0;
	activepoint_off_dashes[1] = 2.0;

	cr->set_dash (activepoint_off_dashes, 0.0);
	cr->set_source_rgb( inactive_color.get_red_p(),
						inactive_color.get_green_p(),
						inactive_color.get_red_p() );

	cr->set_line_width(line_width);
	cr->move_to(from_x, from_y);
	cr->line_to(to_y, to_y);
	cr->stroke();

}

void Settings::get_colour_from_gui (Builder &builder, int i)
{
  const char *glade_name = colour_selectors[i].glade_name;
  vmml::Vector4f *dest =
      (vmml::Vector4f *)PTR_OFFSET(this, colour_selectors[i].member_offset);
  Gdk::Color c;
  Gtk::ColorButton *w = NULL;
  builder->get_widget (glade_name, w);
  if (!w) return;

  c = w->get_color();
  dest->r = c.get_red_p();
  dest->g = c.get_green_p();
  dest->b = c.get_blue_p();
  dest->a = (float) (w->get_alpha()) / 65535.0;

  m_signal_visual_settings_changed.emit();
}

void ConnectionActivityDrawingArea::drawBar(const double x, const double y, const int overlay_count,
		const Gdk::Color & colour) {
	Glib::RefPtr < Gdk::Window > window = get_window();
	Cairo::RefPtr < Cairo::Context > cr = window->create_cairo_context();
	cr->save();
	Gtk::Allocation allocation = get_allocation();
	const int width = allocation.get_width();
	const int height = allocation.get_height();

	cr->set_line_width(2.0);
	//  std::cout<<"ActivityDrawingArea::drawPoints: colour: "<<"("<<main_colour[0]<<","<<main_colour[1]<<","<< main_colour[2] <<std::endl;
	double r = colour.get_red_p();
	double g = colour.get_green_p();
	double b = colour.get_blue_p();
	double step = 0.1;
	//std::cout<<"ActivityDrawingArea::setSourceRGB: "<<"("<<r<<","<<g<<","<<b<<")"<<std::endl;
	for (int i = overlay_count; i > 0; i--) {
		if (r < 1) {
			r += step;
		} else if (g < 1) {
			g += step;
		} else if (b < 1) {
			b += step;
		}
	}
	cr->set_source_rgb(r, g, b);

	double scalex = width / connection->getActivityTimer()->getStartingDelay();

	//scale the drawing in x and y
	cr->move_to(x * scalex, height / 2);
	cr->line_to(x * scalex, y);
	//std::cout << "ConnectionActivityDrawingArea::drawBar: " << "(" << x * scalex << ", " << height / 2 << ")"
	//		<< std::endl;
	cr->stroke();
	cr->restore();
}

/// Converts a Gdk::Color to a k3d::color
const k3d::color convert(const Gdk::Color& RHS)
{
	return k3d::color(RHS.get_red_p(), RHS.get_green_p(), RHS.get_blue_p());
}