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profile: only keep pointer to plot_info in ruler objects

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Now this one was strange:

The ruler items keep a copy of the plot_info struct. However,
only a shallow copy is made (the actual plot data is not copied).
This means that the data is only valid as long as the source
plot_info is valid. But if that is guaranteed, we simply can
keep a pointer instead of the full object.

I wonder if it wouldn't be better still to keep a pointer to
the profile and query that for the plot info?

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Berthold Stoeger 2022-03-12 11:21:56 +01:00 • committed by Dirk Hohndel
parent f9b9582a64
commit ed83f6ce32
2 changed files with 14 additions and 14 deletions
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22
profile-widget/ruleritem.cpp
View file

@ -8,12 +8,12 @@
#include "core/profile.h"
RulerNodeItem2::RulerNodeItem2() :
pInfo(NULL),
idx(-1),
ruler(NULL),
timeAxis(NULL),
depthAxis(NULL)
{
init_plot_info(&pInfo);
setRect(-8, -8, 16, 16);
setBrush(QColor(0xff, 0, 0, 127));
setPen(QColor(Qt::red));
@ -24,7 +24,7 @@ RulerNodeItem2::RulerNodeItem2() :
void RulerNodeItem2::setPlotInfo(const plot_info &info)
{
pInfo = info;
pInfo = &info;
idx = 0;
}
@ -35,19 +35,19 @@ void RulerNodeItem2::setRuler(RulerItem2 *r)
void RulerNodeItem2::recalculate()
{
if (pInfo.nr <= 0)
if (!pInfo || pInfo->nr <= 0)
return;
const struct plot_data &last = pInfo.entry[pInfo.nr - 1];
const struct plot_data &last = pInfo->entry[pInfo->nr - 1];
if (x() < 0) {
setPos(0, y());
} else if (x() > timeAxis->posAtValue(last.sec)) {
setPos(timeAxis->posAtValue(last.sec), depthAxis->posAtValue(last.depth));
} else {
idx = 0;
while (idx < pInfo.nr && timeAxis->posAtValue(pInfo.entry[idx].sec) < x())
while (idx < pInfo->nr && timeAxis->posAtValue(pInfo->entry[idx].sec) < x())
++idx;
const struct plot_data &data = pInfo.entry[idx];
const struct plot_data &data = pInfo->entry[idx];
setPos(timeAxis->posAtValue(data.sec), depthAxis->posAtValue(data.depth));
}
}
@ -62,14 +62,14 @@ void RulerNodeItem2::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
ruler->recalculate();
}
RulerItem2::RulerItem2() : source(new RulerNodeItem2()),
RulerItem2::RulerItem2() : pInfo(NULL),
source(new RulerNodeItem2()),
dest(new RulerNodeItem2()),
timeAxis(NULL),
depthAxis(NULL),
textItemBack(new QGraphicsRectItem(this)),
textItem(new QGraphicsSimpleTextItem(this))
{
memset(&pInfo, 0, sizeof(pInfo));
source->setRuler(this);
dest->setRuler(this);
textItem->setFlag(QGraphicsItem::ItemIgnoresTransformations);
@ -98,7 +98,7 @@ void RulerItem2::recalculate()
QFont font;
QFontMetrics fm(font);
if (timeAxis == NULL || depthAxis == NULL || pInfo.nr == 0)
if (timeAxis == NULL || depthAxis == NULL || !pInfo || pInfo->nr == 0)
return;
prepareGeometryChange();
@ -112,7 +112,7 @@ void RulerItem2::recalculate()
}
QLineF line(startPoint, endPoint);
setLine(line);
compare_samples(dive, &pInfo, source->idx, dest->idx, buffer, 500, 1);
compare_samples(dive, pInfo, source->idx, dest->idx, buffer, 500, 1);
text = QString(buffer);
// draw text
@ -150,7 +150,7 @@ RulerNodeItem2 *RulerItem2::destNode() const
void RulerItem2::setPlotInfo(const struct dive *d, const plot_info &info)
{
dive = d;
pInfo = info;
pInfo = &info;
dest->setPlotInfo(info);
source->setPlotInfo(info);
dest->recalculate();

6
profile-widget/ruleritem.h
View file

@ -6,9 +6,9 @@
#include <QGraphicsEllipseItem>
#include <QGraphicsObject>
#include "profile-widget/divecartesianaxis.h"
#include "core/profile.h"
struct plot_data;
struct plot_info;
class RulerItem2;
class RulerNodeItem2 : public QObject, public QGraphicsEllipseItem {
@ -23,7 +23,7 @@ public:
private:
void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
struct plot_info pInfo;
const struct plot_info *pInfo;
int idx;
RulerItem2 *ruler;
DiveCartesianAxis *timeAxis;
@ -48,7 +48,7 @@ slots:
private:
const struct dive *dive;
struct plot_info pInfo;
const struct plot_info *pInfo;
QPointF startPoint, endPoint;
RulerNodeItem2 *source, *dest;
QString text;