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QDrawUtil: use QPainterStateGuard
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Replace the internal PainterStateGuard class with the now public
QPainterStateGuard.

Pick-to: 6.9
Change-Id: I9c072ce6e45ddfe2d0a8aba789311193788dee5a
Reviewed-by: Volker Hilsheimer <[email protected]>
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@chehrlic
chehrlic committed Dec 21, 2024
1 parent 7690b62 commit 204df60
Showing 1 changed file with 7 additions and 52 deletions.
59 changes: 7 additions & 52 deletions src/widgets/styles/qdrawutil.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
#include "qbitmap.h"
#include "qpixmapcache.h"
#include "qpainter.h"
#include "qpainterstateguard.h"
#include "qpalette.h"
#include "qstylehelper_p.h"
#include <private/qpaintengineex_p.h>
Expand All @@ -14,35 +15,6 @@

QT_BEGIN_NAMESPACE

namespace {
class PainterStateGuard {
Q_DISABLE_COPY_MOVE(PainterStateGuard)
public:
explicit PainterStateGuard(QPainter *p) : m_painter(p) {}
~PainterStateGuard()
{
for ( ; m_level > 0; --m_level)
m_painter->restore();
}

void save()
{
m_painter->save();
++m_level;
}

void restore()
{
m_painter->restore();
--m_level;
}

private:
QPainter *m_painter;
int m_level= 0;
};
} // namespace

/*!
\headerfile <qdrawutil.h>
\inmodule QtWidgets
Expand Down Expand Up @@ -92,10 +64,9 @@ void qDrawShadeLine(QPainter *p, int x1, int y1, int x2, int y2,
qWarning("qDrawShadeLine: Invalid parameters");
return;
}
PainterStateGuard painterGuard(p);
QPainterStateGuard painterGuard(p);
const qreal devicePixelRatio = QStyleHelper::getDpr(p);
if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
painterGuard.save();
const qreal inverseScale = qreal(1) / devicePixelRatio;
p->scale(inverseScale, inverseScale);
x1 = qRound(devicePixelRatio * x1);
Expand All @@ -107,7 +78,6 @@ void qDrawShadeLine(QPainter *p, int x1, int y1, int x2, int y2,
p->translate(0.5, 0.5);
}
int tlw = lineWidth*2 + midLineWidth; // total line width
QPen oldPen = p->pen(); // save pen
if (sunken)
p->setPen(pal.color(QPalette::Dark));
else
Expand Down Expand Up @@ -175,7 +145,6 @@ void qDrawShadeLine(QPainter *p, int x1, int y1, int x2, int y2,
p->drawPolyline(a);
}
}
p->setPen(oldPen);
}

/*!
Expand Down Expand Up @@ -223,10 +192,9 @@ void qDrawShadeRect(QPainter *p, int x, int y, int w, int h,
return;
}

PainterStateGuard painterGuard(p);
QPainterStateGuard painterGuard(p);
const qreal devicePixelRatio = QStyleHelper::getDpr(p);
if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
painterGuard.save();
const qreal inverseScale = qreal(1) / devicePixelRatio;
p->scale(inverseScale, inverseScale);
x = qRound(devicePixelRatio * x);
Expand All @@ -237,8 +205,6 @@ void qDrawShadeRect(QPainter *p, int x, int y, int w, int h,
midLineWidth = qRound(devicePixelRatio * midLineWidth);
p->translate(0.5, 0.5);
}

QPen oldPen = p->pen();
if (sunken)
p->setPen(pal.dark().color());
else
Expand Down Expand Up @@ -288,14 +254,11 @@ void qDrawShadeRect(QPainter *p, int x, int y, int w, int h,
}
}
if (fill) {
QBrush oldBrush = p->brush();
int tlw = lineWidth + midLineWidth;
p->setPen(Qt::NoPen);
p->setBrush(*fill);
p->drawRect(x+tlw, y+tlw, w-2*tlw, h-2*tlw);
p->setBrush(oldBrush);
}
p->setPen(oldPen); // restore pen
}

/*!
Expand Down Expand Up @@ -337,11 +300,10 @@ void qDrawShadePanel(QPainter *p, int x, int y, int w, int h,
qWarning("qDrawShadePanel: Invalid parameters");
}

PainterStateGuard painterGuard(p);
QPainterStateGuard painterGuard(p);
const qreal devicePixelRatio = QStyleHelper::getDpr(p);
bool isTranslated = false;
if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
painterGuard.save();
const qreal inverseScale = qreal(1) / devicePixelRatio;
p->scale(inverseScale, inverseScale);
x = qRound(devicePixelRatio * x);
Expand All @@ -361,7 +323,6 @@ void qDrawShadePanel(QPainter *p, int x, int y, int w, int h,
if (fill->color() == light)
light = pal.midlight().color();
}
QPen oldPen = p->pen(); // save pen
QList<QLineF> lines;
lines.reserve(2*lineWidth);

Expand Down Expand Up @@ -406,7 +367,6 @@ void qDrawShadePanel(QPainter *p, int x, int y, int w, int h,
p->translate(-0.5, -0.5);
p->fillRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2, *fill);
}
p->setPen(oldPen); // restore pen
}

/*!
Expand All @@ -433,11 +393,10 @@ static void qDrawWinShades(QPainter *p,
if (w < 2 || h < 2) // can't do anything with that
return;

PainterStateGuard painterGuard(p);
QPainterStateGuard painterGuard(p);
const qreal devicePixelRatio = QStyleHelper::getDpr(p);
bool isTranslated = false;
if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
painterGuard.save();
const qreal inverseScale = qreal(1) / devicePixelRatio;
p->scale(inverseScale, inverseScale);
x = qRound(devicePixelRatio * x);
Expand All @@ -448,7 +407,6 @@ static void qDrawWinShades(QPainter *p,
isTranslated = true;
}

QPen oldPen = p->pen();
QPoint a[3] = { QPoint(x, y+h-2), QPoint(x, y), QPoint(x+w-2, y) };
p->setPen(c1);
p->drawPolyline(a, 3);
Expand All @@ -468,7 +426,6 @@ static void qDrawWinShades(QPainter *p,
p->fillRect(QRect(x+2, y+2, w-4, h-4), *fill);
}
}
p->setPen(oldPen);
}


Expand Down Expand Up @@ -582,8 +539,7 @@ void qDrawPlainRect(QPainter *p, int x, int y, int w, int h, const QColor &c,
return;
}

PainterStateGuard painterGuard(p);
painterGuard.save();
QPainterStateGuard painterGuard(p);
const qreal devicePixelRatio = QStyleHelper::getDpr(p);
if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
const qreal inverseScale = qreal(1) / devicePixelRatio;
Expand Down Expand Up @@ -646,8 +602,7 @@ void qDrawPlainRoundedRect(QPainter *p, int x, int y, int w, int h,
return;
}

PainterStateGuard painterGuard(p);
painterGuard.save();
QPainterStateGuard painterGuard(p);
const qreal devicePixelRatio = QStyleHelper::getDpr(p);
if (!qFuzzyCompare(devicePixelRatio, qreal(1))) {
const qreal inverseScale = qreal(1) / devicePixelRatio;
Expand Down

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