bool Liveplay::on_keyboard_arrows(GtkAccelGroup *accel_group, GObject *acceleratable,
guint keyval, GdkModifierType modifier, Liveplay& self) {
if (keyval == GDK_KEY_Left || keyval == GDK_KEY_Right) {
Gtk::Adjustment *a = self.brightness_slider->get_adjustment();
double val = a->get_value();
double step = a->get_step_increment();
if (keyval == GDK_KEY_Left) {
val -= step;
} else {
val += step;
}
a->set_value(val);
} else {
Gtk::Adjustment *a = self.background_slider->get_adjustment();
double val = a->get_value();
double step = a->get_step_increment();
if (keyval == GDK_KEY_Down) {
val -= step;
} else {
val += step;
}
a->set_value(val);
}
return true;
}
//
// 左スクロール
//
void ImageViewMain::scroll_left()
{
#ifdef _DEBUG
std::cout << "ImageViewMain::scroll_left\n";
#endif
Gtk::Adjustment* hadjust = m_scrwin->get_hadjustment();
if( !hadjust ) return;
hadjust->set_value( MAX( 0, hadjust->get_value() - hadjust->get_step_increment() ) );
}
//
// 上スクロール
//
void ImageViewMain::scroll_up()
{
#ifdef _DEBUG
std::cout << "ImageViewMain::scroll_up\n";
#endif
Gtk::Adjustment* vadjust = m_scrwin->get_vadjustment();
if( !vadjust ) return;
vadjust->set_value( MAX( 0, vadjust->get_value() - vadjust->get_step_increment() ) );
}
//
// 右スクロール
//
void ImageViewMain::scroll_right()
{
#ifdef _DEBUG
std::cout << "ImageViewMain::scroll_right\n";
#endif
Gtk::Adjustment* hadjust = m_scrwin->get_hadjustment();
if( !hadjust ) return;
hadjust->set_value( MIN( hadjust->get_upper() - hadjust->get_page_size(),
hadjust->get_value() + hadjust->get_step_increment() ) );
}
//
// 下スクロール
//
void ImageViewMain::scroll_down()
{
#ifdef _DEBUG
std::cout << "ImageViewMain::scroll_down\n";
#endif
Gtk::Adjustment* vadjust = m_scrwin->get_vadjustment();
if( !vadjust ) return;
vadjust->set_value( MIN( vadjust->get_upper() - vadjust->get_page_size(),
vadjust->get_value() + vadjust->get_step_increment() ) );
}