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cleanup: prevent distracing conversion warnings

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We do want the -Wfloat-conversion warnings where they point out
potential bugs. But they are very distracting when they are triggered by
floating point literals (which the standard defines as double) passed to
a function expecting float arguments.

The fact that Qt6 changes the arguments to all these functions from
double to float is... hard to explain, but it is what it is. With these
changes, for the majority of cases we create inlined helpers that
conditionally compile to do the right thing. And in a handful of other
cases we simply cast to float (and accept that on Qt5 this then gets
cast back to double... for none of these cases the potential loss in
precision makes any difference, anyway - which likely is why the Qt
community made the decision to change the type of the arguments in the
first place).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2022-02-15 11:23:27 -08:00
parent 81ed23583e
commit 59fe2f3d7e
6 changed files with 84 additions and 66 deletions
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8
desktop-widgets/kmessagewidget.cpp
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@ -250,9 +250,9 @@ KMessageWidget::MessageType KMessageWidget::messageType() const
static QColor darkShade(QColor c)
{
qreal contrast = 0.7; // taken from kcolorscheme for the dark shade
double contrast = 0.7; // taken from kcolorscheme for the dark shade
qreal darkAmount;
double darkAmount;
if (c.lightnessF() < 0.006) { /* too dark */
darkAmount = 0.02 + 0.40 * contrast;
} else if (c.lightnessF() > 0.93) { /* too bright */
@ -261,9 +261,9 @@ static QColor darkShade(QColor c)
darkAmount = (-c.lightnessF()) * (0.55 + contrast * 0.35);
}
qreal v = c.lightnessF() + darkAmount;
double v = c.lightnessF() + darkAmount;
v = v > 0.0 ? (v < 1.0 ? v : 1.0) : 0.0;
c.setHsvF(c.hslHueF(), c.hslSaturationF(), v);
c.setHsvF(c.hslHueF(), c.hslSaturationF(), (float)v);
return c;
}