TimeMarker: Added default get_label_rect implementation

[pulseview.git] / pv / view / timemarker.cpp

diff --git a/pv/view/timemarker.cpp b/pv/view/timemarker.cpp
index 6571bea95c0eac9e6c98c3fca0f27bb9511a5c79..d4bd7140e92fba17cdf300495c35331cfa24ac1f 100644 (file)
--- a/pv/view/timemarker.cpp
+++ b/pv/view/timemarker.cpp
@@ -18,18 +18,31 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <algorithm>
+
+#include <extdef.h>
+
 #include "timemarker.hpp"
 
 #include "view.hpp"
 
+#include <QApplication>
 #include <QFormLayout>
+#include <QFontMetrics>
 #include <QPainter>
 
+#include <pv/util.hpp>
 #include <pv/widgets/popup.hpp>
 
+using std::max;
+using std::min;
+
 namespace pv {
 namespace view {
 
+const int TimeMarker::ArrowSize = 4;
+const int TimeMarker::Offset = 1;
+
 TimeMarker::TimeMarker(View &view, const QColor &colour, double time) :
        view_(view),
        colour_(colour),
@@ -71,10 +84,78 @@ void TimeMarker::set_time(double time)
 void TimeMarker::paint(QPainter &p, const QRect &rect)
 {
        const float x = get_x();
-       p.setPen(colour_);
+       p.setPen(colour_.darker());
        p.drawLine(QPointF(x, rect.top()), QPointF(x, rect.bottom()));
 }
 
+QRectF TimeMarker::get_label_rect(const QRect &rect) const
+{
+       const float x = (time_ - view_.offset()) / view_.scale();
+
+       QFontMetrics m(QApplication::font());
+       QSize text_size = m.boundingRect(
+               pv::util::format_time(time_, view_.tick_prefix(), 2)).size();
+
+       const QSizeF label_size(
+               text_size.width() + View::LabelPadding.width() * 2,
+               text_size.height() + View::LabelPadding.height() * 2);
+       const float top = rect.height() - label_size.height() -
+               TimeMarker::Offset - TimeMarker::ArrowSize - 0.5f;
+       const float height = label_size.height();
+
+       return QRectF(x - label_size.width() / 2 - 0.5f, top,
+               label_size.width(), height);
+}
+
+void TimeMarker::paint_label(QPainter &p, const QRect &rect)
+{
+       const qreal x = (time_ - view_.offset()) / view_.scale();
+       const QRectF r(get_label_rect(rect));
+
+       const QPointF points[] = {
+               r.topLeft(),
+               r.bottomLeft(),
+               QPointF(max(r.left(), x - ArrowSize), r.bottom()),
+               QPointF(x, rect.bottom()),
+               QPointF(min(r.right(), x + ArrowSize), r.bottom()),
+               r.bottomRight(),
+               r.topRight()
+       };
+
+       const QPointF highlight_points[] = {
+               QPointF(r.left() + 1, r.top() + 1),
+               QPointF(r.left() + 1, r.bottom() - 1),
+               QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
+               QPointF(min(max(r.left() + 1, x), r.right() - 1),
+                       rect.bottom() - 1),
+               QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
+               QPointF(r.right() - 1, r.bottom() - 1),
+               QPointF(r.right() - 1, r.top() + 1),
+       };
+
+       if (selected()) {
+               p.setPen(highlight_pen());
+               p.setBrush(Qt::transparent);
+               p.drawPolygon(points, countof(points));
+       }
+
+       p.setPen(Qt::transparent);
+       p.setBrush(colour_);
+       p.drawPolygon(points, countof(points));
+
+       p.setPen(colour_.lighter());
+       p.setBrush(Qt::transparent);
+       p.drawPolygon(highlight_points, countof(highlight_points));
+
+       p.setPen(colour_.darker());
+       p.setBrush(Qt::transparent);
+       p.drawPolygon(points, countof(points));
+
+       p.setPen(select_text_colour(colour_));
+       p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter,
+               pv::util::format_time(time_, view_.tick_prefix(), 2));
+}
+
 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
 {
        using pv::widgets::Popup;