Restructure library and plugins

The "core" macro conditions and actions have been extracted out to the
"base" plugin.

The library now mostly contains functionality which is required across
all plugins and (e.g. definitions for macro segments).

The goal is to reduce the complexity and cross-dependencies and group
the source files in a better way.

This should relsove the "library limit of 65535 objects exceeded" build
issue occuring in some Windows build environments.

lib/utils/switch-button.cpp

@@ -0,0 +1,102 @@
+#include "switch-button.hpp"
+
+#include <QMouseEvent>
+#include <QPainter>
+#include <QPalette>
+
+namespace advss {
+
+static const int s_height = 20;
+static const int s_innerMargin = 4;
+static const int s_handleSize = s_height - s_innerMargin * 2;
+static const int s_width = s_handleSize * 2 + s_innerMargin * 2;
+
+SwitchButton::SwitchButton(QWidget *parent) : QWidget{parent}
+{
+	setSizePolicy({QSizePolicy::Fixed, QSizePolicy::Fixed});
+	setFocusPolicy(Qt::TabFocus);
+	setAttribute(Qt::WA_Hover);
+}
+
+void SwitchButton::setChecked(bool checked)
+{
+	if (_checked == checked) {
+		return;
+	}
+	_checked = checked;
+	emit toggled(checked);
+	update();
+}
+
+bool SwitchButton::isChecked() const
+{
+	return _checked;
+}
+
+void SwitchButton::toggle()
+{
+	setChecked(!_checked);
+}
+
+QSize SwitchButton::sizeHint() const
+{
+	return QSize(s_width, s_height);
+}
+
+void SwitchButton::paintEvent(QPaintEvent *)
+{
+	QPainter painter(this);
+	painter.setRenderHint(QPainter::Antialiasing);
+	QPalette pal = palette();
+
+	if (!isEnabled()) {
+		painter.setPen(pal.color(QPalette::Midlight));
+		painter.setOpacity(0.5);
+	} else if (_mouseDown) {
+		painter.setPen(pal.color(QPalette::Light));
+	} else if (underMouse() || hasFocus()) {
+		painter.setPen(QPen(pal.brush(QPalette::Highlight), 1));
+	} else {
+		painter.setPen(pal.color(QPalette::Midlight));
+	}
+
+	if (_checked) {
+		painter.setBrush(pal.color(QPalette::Button));
+	}
+	const qreal radius = height() / 2;
+	painter.drawRoundedRect(QRectF(rect()).adjusted(0.5, 0.5, -0.5, -0.5),
+				radius, radius);
+
+	// Now draw the handle
+	QRect valueRect = rect().adjusted(s_innerMargin, s_innerMargin,
+					  -s_innerMargin, -s_innerMargin);
+	valueRect.setWidth(valueRect.height());
+
+	if (_checked) {
+		valueRect.moveLeft(width() / 2);
+	}
+	painter.setBrush(pal.color(QPalette::Base));
+	painter.drawEllipse(valueRect);
+}
+
+void SwitchButton::mousePressEvent(QMouseEvent *event)
+{
+	if (event->button() == Qt::LeftButton) {
+		_mouseDown = true;
+	} else {
+		event->ignore();
+	}
+}
+
+void SwitchButton::mouseReleaseEvent(QMouseEvent *event)
+{
+	if (event->button() == Qt::LeftButton && _mouseDown) {
+		_mouseDown = false;
+		toggle();
+		emit checked(_checked);
+	} else {
+		event->ignore();
+	}
+}
+
+} // namespace advss