void GuiScroll::set_value(int value) {
int old_value = current_value;
current_value = value;
recalc();
if (current_value != old_value) {
if (on_value_changed) {
on_value_changed(this, on_value_changed_data, current_value);
}
}
}
/*!
*/
KScrollBar::KScrollBar(QGraphicsItem *parent)
: KWidget(parent)
, m_value(0)
, m_minimum(0)
, m_maximum(1)
, m_deltaFactor(1.0)
, m_singleStep(1)
, m_pageStep(1)
, m_orientation(Qt::Horizontal)
, m_pressedValue(0)
, m_hoveredControl(QStyle::SC_None)
, m_pressedControl(QStyle::SC_None)
, m_initialDelay(250)
, m_repeatFrequency(50)
, m_buttonHeight(14)
, m_frameThickness(15)
, m_sliderMinimumHeight(16)
, m_ptThumbIconOffset(0,0)
, m_bShowFullOnHover(false)
{
setAcceptHoverEvents(true);
setAcceptedMouseButtons(Qt::LeftButton);
m_lineAddButton = new KPushButton(this);
m_lineAddButton->setZValue(1);
QObject::connect(m_lineAddButton, SIGNAL(clicked()), this, SLOT(on_linebutton_clicked()));
addChild(m_lineAddButton);
m_lineSubButton = new KPushButton(this);
m_lineSubButton->setZValue(1);
QObject::connect(m_lineSubButton, SIGNAL(clicked()), this, SLOT(on_linebutton_clicked()));
addChild(m_lineSubButton);
m_thumb = new KFrameItem(this);
m_thumb->setFrameType(KFrameItem::GridFour);
m_thumb->setZValue(1000);
addChild(m_thumb);
m_thumbIcon = new KIcon(this);
m_thumbIcon->setZValue(2000);
addChild(m_thumbIcon);
m_background = new KFrameItem(this);
m_background->setFrameType(KFrameItem::GridFour);
m_background->setZValue(0);
addChild(m_background);
QObject::connect(this, SIGNAL(valueChanged(qreal)), this, SLOT(on_value_changed(qreal)));
setOrientation(Qt::Vertical);
displayFullOnHover(m_bShowFullOnHover ? false : true);
}
bool Widget::refresh_meter_level(float new_level) {
static const float falloff = 87 * 60 * 0.001;
// Note: removed RMS calculation, we will only focus on max peaks
static float old_peak_db = -INFINITY;
// calculate peak dB and translate into meter
float peak_db = -INFINITY;
if (new_level > 0) {
peak_db = power2db(new_level);
}
// retrieve old meter value and consider falloff
if (peak_db < old_peak_db) {
peak_db = max(peak_db, old_peak_db - falloff);
}
fastmeter.set(log_meter(peak_db));
old_peak_db = peak_db;
// reset the maxlevel buffer in the vumeter thread
reset *= -1;
on_value_changed(RESET);
return true;
}
void Slider::handle_event(gui::EventArgs &args)
{
if (args.type == gui::Event_CursorDrag || args.type == gui::Event_CursorButtonPressed)
{
// To find the 'current_value' of the slider, we work backwards by
// taking the input at args.local.x and computing the desired position
// for the drag handle.
// calculate usable width
Point left_edge = get_left_edge();
Point right_edge = get_right_edge();
float usable_width = (right_edge.x - left_edge.x);
// user clicked or dragged at input
float input = args.local.x;
// translate it back by half the handle width
float slider_origin = (input - (drag_handle_width / 2.0f));
// cache the previous value
float old_value = current_value;
// compute the new value as it should be in our usable_width
current_value = glm::clamp(((slider_origin - kLeftMargin) / usable_width), 0.0f, 1.0f);
// set pressed color
drag_handle->set_background_color(gemini::Color::from_rgba(255, 128, 0, 255));
if ((old_value != current_value) && on_value_changed.is_valid())
{
on_value_changed(current_value);
}
args.compositor->set_focus(this);
args.handled = true;
}
else if (args.type == gui::Event_KeyButtonReleased)
{
// TODO: handle home/end + various other keys
args.handled = true;
}
else if (args.type == gui::Event_CursorMove)
{
Point pt = args.local - drag_handle->get_origin();
if (drag_handle->hit_test_local(pt))
{
drag_handle->set_background_color(gemini::Color::from_rgba(255, 128, 128, 255));
}
else
{
drag_handle->set_background_color(gemini::Color::from_rgba(0, 255, 0, 255));
}
args.handled = true;
}
else if (args.type == gui::Event_CursorExit)
{
drag_handle->set_background_color(gemini::Color::from_rgba(0, 255, 0, 255));
args.handled = true;
}
}
