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profile: avoid double recalculation of tick positions

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The ticks were recalculated twice per plotDive() call:
1) When updating the position of the axes in updateChangeLine()
2) After setting the bounds in plotDive() via setBounds()

Remove the first instance. updateChangeLine() is called in
only one place [from plotDive()] and therefore, the recalculation
is always redundant. Moreover, rename the function to setPosition(),
since it doesn't do any animation at all.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-09-28 10:32:41 +02:00 • committed by Dirk Hohndel
parent b0faf2e4b1
commit 99c4741508
4 changed files with 10 additions and 19 deletions
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10
profile-widget/divecartesianaxis.cpp
View file

@ -289,13 +289,7 @@ void DiveCartesianAxis::updateTicks(int animSpeed)
changed = false;
}
void DiveCartesianAxis::setLine(const QLineF &line)
{
QGraphicsLineItem::setLine(line);
changed = true;
}
void DiveCartesianAxis::animateChangeLine(const QRectF &rectIn, int animSpeed)
void DiveCartesianAxis::setPosition(const QRectF &rectIn)
{
rect = rectIn;
switch (position) {
@ -310,7 +304,7 @@ void DiveCartesianAxis::animateChangeLine(const QRectF &rectIn, int animSpeed)
setLine(QLineF(rect.bottomLeft(), rect.bottomRight()));
break;
}
updateTicks(animSpeed);
changed = true;
}
double DiveCartesianAxis::Transform::to(double x) const

3
profile-widget/divecartesianaxis.h
View file

@ -44,10 +44,9 @@ public:
std::pair<double, double> screenMinMax() const;
qreal valueAt(const QPointF &p) const;
qreal posAtValue(qreal value) const;
void animateChangeLine(const QRectF &rect, int animSpeed);
void setPosition(const QRectF &rect);
void setTextVisible(bool arg1);
void setLinesVisible(bool arg1);
void setLine(const QLineF &line);
void updateTicks(int animSpeed);
double width() const; // only for vertical axes
double height() const; // only for horizontal axes

14
profile-widget/profilescene.cpp
View file

@ -218,10 +218,8 @@ struct VerticalAxisLayout {
bool visible;
};
void ProfileScene::updateAxes(bool instant, bool diveHasHeartBeat)
void ProfileScene::updateAxes(bool diveHasHeartBeat)
{
int animSpeed = instant || printMode ? 0 : qPrefDisplay::animation_speed();
// Calculate left and right border needed for the axes.
// viz. the depth axis to the left and the partial pressure axis to the right.
// Thus, calculating the "border" of the graph is trivial.
@ -248,7 +246,7 @@ void ProfileScene::updateAxes(bool instant, bool diveHasHeartBeat)
}
bottomBorder -= timeAxis->height();
timeAxis->animateChangeLine(QRectF(leftBorder, topBorder, width, bottomBorder - topBorder), animSpeed);
timeAxis->setPosition(QRectF(leftBorder, topBorder, width, bottomBorder - topBorder));
if (prefs.tankbar) {
bottomBorder -= tankItem->height();
@ -290,14 +288,14 @@ void ProfileScene::updateAxes(bool instant, bool diveHasHeartBeat)
if (!l.visible)
continue;
bottomBorder -= l.height * dpr;
l.axis->animateChangeLine(QRectF(leftBorder, bottomBorder, width, l.height * dpr), animSpeed);
l.axis->setPosition(QRectF(leftBorder, bottomBorder, width, l.height * dpr));
}
height = bottomBorder - topBorder;
profileYAxis->animateChangeLine(QRectF(leftBorder, topBorder, width, height), animSpeed);
profileYAxis->setPosition(QRectF(leftBorder, topBorder, width, height));
// The cylinders are displayed in the 24-80% region of the profile
cylinderPressureAxis->animateChangeLine(QRectF(leftBorder, topBorder + 0.24 * height, width, 0.56 * height), animSpeed);
cylinderPressureAxis->setPosition(QRectF(leftBorder, topBorder + 0.24 * height, width, 0.56 * height));
// Set scale factors depending on locale.
// The conversion calls, such as mm_to_feet(), will be optimized away.
@ -371,7 +369,7 @@ void ProfileScene::plotDive(const struct dive *dIn, int dcIn, DivePlannerPointsM
bool hasHeartBeat = plotInfo.maxhr;
updateVisibility(hasHeartBeat);
updateAxes(instant, hasHeartBeat);
updateAxes(hasHeartBeat);
int newMaxtime = get_maxtime(&plotInfo);
if (calcMax || newMaxtime > maxtime)

2
profile-widget/profilescene.h
View file

@ -60,7 +60,7 @@ private:
PartialPressureGasItem *createPPGas(int column, color_index_t color, color_index_t colorAlert,
const double *thresholdSettingsMin, const double *thresholdSettingsMax);
void updateVisibility(bool diveHasHeartBeat); // Update visibility of non-interactive chart features according to preferences
void updateAxes(bool instant, bool diveHasHeartBeat); // Update axes according to preferences
void updateAxes(bool diveHasHeartBeat); // Update axes according to preferences
friend class ProfileWidget2; // For now, give the ProfileWidget full access to the objects on the scene
double dpr; // Device Pixel Ratio. A DPR of one corresponds to a "standard" PC screen.