From: Joel Holdsworth <redacted>
Date: Sun, 28 Oct 2012 18:00:50 +0000 (+0000)
Subject: Added cursors
X-Git-Tag: pulseview-0.1.0~231
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=f76af6375b8aea6b7edb2d6ee838e1589c3490f3;p=pulseview.git

Added cursors
---

diff --git a/pv/view/ruler.cpp b/pv/view/ruler.cpp
index c5f194f2..83863e61 100644
--- a/pv/view/ruler.cpp
+++ b/pv/view/ruler.cpp
@@ -31,6 +31,8 @@
 #include <QPainter>
 #include <QTextStream>
 
+using namespace std;
+
 namespace pv {
 namespace view {
 
@@ -123,12 +125,26 @@ void Ruler::paintEvent(QPaintEvent *event)
 		division++;
 	}
 
+	// Draw the cursors
+	draw_cursors(p);
+
 	// Draw the hover mark
 	draw_hover_mark(p);
 
 	p.end();
 }
 
+void Ruler::draw_cursors(QPainter &p)
+{
+	if(!_view.cursors_shown())
+		return;
+
+	const QRect r = rect();
+	pair<Cursor, Cursor> &cursors = _view.cursors();
+	cursors.first.paint_label(p, r);
+	cursors.second.paint_label(p, r);
+}
+
 void Ruler::draw_hover_mark(QPainter &p)
 {
 	const int x = _view.hover_point().x();
diff --git a/pv/view/ruler.h b/pv/view/ruler.h
index 1bda0642..1381502d 100644
--- a/pv/view/ruler.h
+++ b/pv/view/ruler.h
@@ -48,6 +48,8 @@ private:
 	void paintEvent(QPaintEvent *event);
 
 private:
+	void draw_cursors(QPainter &p);
+
 	/**
 	 * Draw a hover arrow under the cursor position.
 	 */
diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index 54871b5e..7d3dc7f6 100644
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -53,6 +53,8 @@ const int View::MaxScrollValue = INT_MAX / 2;
 
 const int View::SignalHeight = 50;
 
+const QColor View::CursorAreaColour(220, 231, 243);
+
 View::View(SigSession &session, QWidget *parent) :
 	QAbstractScrollArea(parent),
 	_session(session),
@@ -63,6 +65,9 @@ View::View(SigSession &session, QWidget *parent) :
 	_scale(1e-6),
 	_offset(0),
 	_v_offset(0),
+	_show_cursors(false),
+	_cursors(pair<Cursor, Cursor>(Cursor(*this, 0.0),
+		Cursor(*this, 1.0))),
 	_hover_point(-1, -1)
 {
 	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
@@ -128,6 +133,23 @@ void View::set_scale_offset(double scale, double offset)
 	_viewport->update();
 }
 
+bool View::cursors_shown() const
+{
+	return _show_cursors;
+}
+
+void View::show_cursors(bool show)
+{
+	_show_cursors = show;
+	_ruler->update();
+	_viewport->update();
+}
+
+std::pair<Cursor, Cursor>& View::cursors()
+{
+	return _cursors;
+}
+
 const QPoint& View::hover_point() const
 {
 	return _hover_point;
diff --git a/pv/view/view.h b/pv/view/view.h
index ac2835a4..13dd766c 100644
--- a/pv/view/view.h
+++ b/pv/view/view.h
@@ -23,8 +23,12 @@
 
 #include <stdint.h>
 
+#include <utility>
+
 #include <QAbstractScrollArea>
 
+#include "cursor.h"
+
 namespace pv {
 
 class SigSession;
@@ -50,6 +54,8 @@ private:
 public:
 	static const int SignalHeight;
 
+	static const QColor CursorAreaColour;
+
 public:
 	explicit View(SigSession &session, QWidget *parent = 0);
 
@@ -77,6 +83,21 @@ public:
 	 */
 	void set_scale_offset(double scale, double offset);
 
+	/**
+	 * Returns true if cursors are displayed. false otherwise.
+	 */
+	bool cursors_shown() const;
+
+	/**
+	 * Shows or hides the cursors.
+	 */
+	void show_cursors(bool show = true);
+
+	/**
+	 * Returns a reference to the pair of cursors.
+	 */
+	std::pair<Cursor, Cursor>& cursors();
+
 	const QPoint& hover_point() const;
 
 signals:
@@ -118,6 +139,9 @@ private:
 
 	int _v_offset;
 
+	bool _show_cursors;
+	std::pair<Cursor, Cursor> _cursors;
+
 	QPoint _hover_point;
 };
 
diff --git a/pv/view/viewport.cpp b/pv/view/viewport.cpp
index 99e08b27..2dcf9dc7 100644
--- a/pv/view/viewport.cpp
+++ b/pv/view/viewport.cpp
@@ -63,6 +63,8 @@ void Viewport::paintEvent(QPaintEvent *event)
 	QPainter p(this);
 	p.setRenderHint(QPainter::Antialiasing);
 
+	draw_cursors_background(p);
+
 	// Plot the signal
 	int offset = -_view.v_offset();
 	BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
@@ -77,6 +79,8 @@ void Viewport::paintEvent(QPaintEvent *event)
 		offset += View::SignalHeight;
 	}
 
+	draw_cursors_foreground(p);
+
 	p.end();
 }
 
@@ -112,5 +116,33 @@ void Viewport::wheelEvent(QWheelEvent *event)
 	_view.zoom(event->delta() / 120, event->x());
 }
 
+void Viewport::draw_cursors_background(QPainter &p)
+{
+	if(!_view.cursors_shown())
+		return;
+
+	p.setPen(Qt::NoPen);
+	p.setBrush(QBrush(View::CursorAreaColour));
+
+	const pair<Cursor, Cursor> &c = _view.cursors();
+	const float x1 = (c.first.time() - _view.offset()) / _view.scale();
+	const float x2 = (c.second.time() - _view.offset()) / _view.scale();
+	const int l = (int)max(min(x1, x2), 0.0f);
+	const int r = (int)min(max(x1, x2), (float)width());
+
+	p.drawRect(l, 0, r - l, height());
+}
+
+void Viewport::draw_cursors_foreground(QPainter &p)
+{
+	if(!_view.cursors_shown())
+		return;
+
+	const QRect r = rect();
+	pair<Cursor, Cursor> &cursors = _view.cursors();
+	cursors.first.paint(p, r);
+	cursors.second.paint(p, r);
+}
+
 } // namespace view
 } // namespace pv
diff --git a/pv/view/viewport.h b/pv/view/viewport.h
index a33d4045..49b97e3b 100644
--- a/pv/view/viewport.h
+++ b/pv/view/viewport.h
@@ -51,6 +51,11 @@ private:
 	void mouseReleaseEvent(QMouseEvent *event);
 	void wheelEvent(QWheelEvent *event);
 
+private:
+	void draw_cursors_background(QPainter &p);
+
+	void draw_cursors_foreground(QPainter &p);
+
 private:
 	View &_view;