Add TriggerMarker class.

This will be used in a follow-up changeset for the markers that
visualize the time of SR_DF_TRIGGER.

Note that this copies a little code from the TimeMarker class,
but that seemed a better idea than deriving from it and disabling
the popup and label-drawing code.

CMakeLists.txt

@@ -206,6 +206,7 @@ set(pulseview_SOURCES
 	pv/view/tracepalette.cpp
 	pv/view/tracetreeitem.cpp
 	pv/view/tracetreeitemowner.cpp
+	pv/view/triggermarker.cpp
 	pv/view/view.cpp
 	pv/view/viewitem.cpp
 	pv/view/viewitemowner.cpp
@@ -258,6 +259,7 @@ set(pulseview_HEADERS
 	pv/view/trace.hpp
 	pv/view/tracegroup.hpp
 	pv/view/tracetreeitem.hpp
+	pv/view/triggermarker.hpp
 	pv/view/view.hpp
 	pv/view/viewitem.hpp
 	pv/view/viewport.hpp

pv/view/triggermarker.cpp

@@ -0,0 +1,82 @@
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include "triggermarker.hpp"
+#include "view.hpp"
+
+namespace pv {
+namespace view {
+
+const QColor TriggerMarker::Colour(0x00, 0x00, 0xB0);
+
+TriggerMarker::TriggerMarker(View &view, const pv::util::Timestamp& time) :
+	TimeItem(view),
+	time_(time)
+{
+}
+
+TriggerMarker::TriggerMarker(const TriggerMarker &marker) :
+	TimeItem(marker.view_),
+	time_(marker.time_)
+{
+}
+
+bool TriggerMarker::enabled() const
+{
+	return true;
+}
+
+bool TriggerMarker::is_draggable() const
+{
+	return false;
+}
+
+void TriggerMarker::set_time(const pv::util::Timestamp& time)
+{
+	time_ = time;
+
+	view_.time_item_appearance_changed(true, true);
+}
+
+float TriggerMarker::get_x() const
+{
+	return ((time_ - view_.offset()) / view_.scale()).convert_to<float>();
+}
+
+QPoint TriggerMarker::point(const QRect &rect) const
+{
+	return QPoint(get_x(), rect.bottom());
+}
+
+void TriggerMarker::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
+{
+	if (!enabled())
+		return;
+
+	QPen pen(Colour);
+	pen.setStyle(Qt::DashLine);
+
+	const float x = get_x();
+	p.setPen(pen);
+	p.drawLine(QPointF(x, pp.top()), QPointF(x, pp.bottom()));
+}
+
+} // namespace view
+} // namespace pv

pv/view/triggermarker.hpp

@@ -0,0 +1,86 @@
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef PULSEVIEW_PV_VIEW_TRIGGER_MARKER_HPP
+#define PULSEVIEW_PV_VIEW_TRIGGER_MARKER_HPP
+
+#include "timeitem.hpp"
+
+namespace pv {
+namespace view {
+
+class TriggerMarker : public TimeItem
+{
+	Q_OBJECT
+
+public:
+	static const QColor Colour;
+
+public:
+	/**
+	 * Constructor.
+	 * @param view A reference to the view that owns this marker.
+	 * @param time The time to set the marker to.
+	 */
+	TriggerMarker(View &view, const pv::util::Timestamp& time);
+
+	/**
+	 * Copy constructor.
+	 */
+	TriggerMarker(const TriggerMarker &marker);
+
+	/**
+	 * Returns true if the item is visible and enabled.
+	 */
+	bool enabled() const override;
+
+	/**
+	  Returns true if the item may be dragged/moved.
+	 */
+	bool is_draggable() const override;
+
+	/**
+	 * Sets the time of the marker.
+	 */
+	void set_time(const pv::util::Timestamp& time) override;
+
+	float get_x() const override;
+
+	/**
+	 * Gets the arrow-tip point of the time marker.
+	 * @param rect the rectangle of the ruler area.
+	 */
+	QPoint point(const QRect &rect) const override;
+
+	/**
+	 * Paints the foreground layer of the item with a QPainter
+	 * @param p the QPainter to paint into.
+	 * @param pp the painting parameters object to paint with.
+	 **/
+	void paint_fore(QPainter &p, const ViewItemPaintParams &pp) override;
+
+private:
+	pv::util::Timestamp time_;
+};
+
+} // namespace view
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEW_TRIGGER_MARKER_HPP

test/CMakeLists.txt

@@ -61,6 +61,7 @@ set(pulseview_TEST_SOURCES
 	${PROJECT_SOURCE_DIR}/pv/view/tracepalette.cpp
 	${PROJECT_SOURCE_DIR}/pv/view/tracetreeitem.cpp
 	${PROJECT_SOURCE_DIR}/pv/view/tracetreeitemowner.cpp
+	${PROJECT_SOURCE_DIR}/pv/view/triggermarker.cpp
 	${PROJECT_SOURCE_DIR}/pv/view/view.cpp
 	${PROJECT_SOURCE_DIR}/pv/view/viewitem.cpp
 	${PROJECT_SOURCE_DIR}/pv/view/viewitemowner.cpp
@@ -109,6 +110,7 @@ set(pulseview_TEST_HEADERS
 	${PROJECT_SOURCE_DIR}/pv/view/trace.hpp
 	${PROJECT_SOURCE_DIR}/pv/view/tracegroup.hpp
 	${PROJECT_SOURCE_DIR}/pv/view/tracetreeitem.hpp
+	${PROJECT_SOURCE_DIR}/pv/view/triggermarker.hpp
 	${PROJECT_SOURCE_DIR}/pv/view/view.hpp
 	${PROJECT_SOURCE_DIR}/pv/view/viewitem.hpp
 	${PROJECT_SOURCE_DIR}/pv/view/viewport.hpp