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serenity/Userland/Applications/Piano/ProcessorParameterWidget/Slider.cpp
kleines Filmröllchen 00e13b5b27 LibDSP: Rename library namespace to DSP
That's the standard naming convention, but I didn't follow it when
originally creating LibDSP and nobody corrected me, so here I am one
year later :^)
2022-07-19 11:17:45 +01:00

57 lines
2.2 KiB
C++

/*
* Copyright (c) 2021, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Slider.h"
#include "WidgetWithLabel.h"
#include <AK/FixedPoint.h>
#include <AK/Math.h>
ProcessorParameterSlider::ProcessorParameterSlider(Orientation orientation, DSP::ProcessorRangeParameter& parameter, RefPtr<GUI::Label> value_label)
: Slider(orientation)
, WidgetWithLabel(move(value_label))
, m_parameter(parameter)
{
if (!is_logarithmic()) {
set_range(m_parameter.min_value().raw(), m_parameter.max_value().raw());
set_value(m_parameter.value().raw());
set_step((m_parameter.min_value() - m_parameter.max_value()).raw() / slider_steps);
} else {
auto min_log = m_parameter.min_value().log2().raw();
auto max_log = m_parameter.max_value().log2().raw();
auto value_log = m_parameter.value().log2().raw();
set_range(min_log, max_log);
set_value(value_log);
set_step((min_log - max_log) / slider_steps);
}
set_tooltip(m_parameter.name());
m_value_label->set_text(String::formatted("{:.2f}", static_cast<double>(m_parameter)));
on_change = [this](auto value) {
DSP::ParameterFixedPoint real_value;
real_value.raw() = value;
if (is_logarithmic())
// FIXME: Implement exponential for fixed point
real_value = exp(static_cast<double>(real_value));
m_parameter.set_value_sneaky(real_value, DSP::Detail::ProcessorParameterSetValueTag {});
if (m_value_label) {
double value = static_cast<double>(m_parameter);
String label_text = String::formatted("{:.2f}", value);
// FIXME: This is a magic value; we know that with normal font sizes, the label will disappear starting from approximately this length.
// Can we do this dynamically?
if (label_text.length() > 7)
m_value_label->set_text(String::formatted("{:.0f}", value));
else
m_value_label->set_text(label_text);
}
};
m_parameter.did_change_value = [this](auto value) {
if (!is_logarithmic())
set_value(value.raw());
else
set_value(value.log2().raw());
};
}