Introducing SH_SpinBox_ButtonsInsideFrame

This is currently only used in QMacStyle since,
on macOS, the spin-box buttons are always beside
the line-edit. Hence, there is no need to tamper
with the line-edit frame.

Change-Id: I8ccfbab547fccae89a8ddeaeb7005cb17d5951e6
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

src/plugins/styles/mac/qmacstyle_mac.mm

@@ -2387,14 +2387,6 @@ int QMacStyle::pixelMetric(PixelMetric metric, const QStyleOption *opt, const QW
         break;
     case PM_SpinBoxFrameWidth:
         ret = qt_mac_aqua_get_metric(EditTextFrameOutset);
-        switch (d->aquaSizeConstrain(opt, widget)) {
-        case QStyleHelper::SizeMini:
-            ret += 1;
-            break;
-        default:
-            ret += 2;
-            break;
-        }
         break;
     case PM_ButtonShiftHorizontal:
     case PM_ButtonShiftVertical:
@@ -3001,6 +2993,9 @@ int QMacStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget *w
     case SH_ComboBox_AllowWheelScrolling:
         ret = false;
         break;
+    case SH_SpinBox_ButtonsInsideFrame:
+        ret = false;
+        break;
     default:
         ret = QCommonStyle::styleHint(sh, opt, w, hret);
         break;
@@ -4157,16 +4152,7 @@ void QMacStyle::drawControl(ControlElement ce, const QStyleOption *opt, QPainter
         const int hMargin = proxy()->pixelMetric(QStyle::PM_FocusFrameHMargin, opt, w);
         const int vMargin = proxy()->pixelMetric(QStyle::PM_FocusFrameVMargin, opt, w);
         if (ct == QMacStylePrivate::Box) {
-            auto frameRect = opt->rect;
+            d->drawFocusRing(p, opt->rect, hMargin, vMargin);
-            if (ffw && ffw->inherits("QLineEdit")
-                    && ffw->parentWidget()
-                    && ffw->parentWidget()->inherits("QAbstractSpinBox")) {
-                // See CC_SpinBox case for drawComplexControl
-                const int frame_size = qt_mac_aqua_get_metric(EditTextFrameOutset);
-                frameRect = frameRect.adjusted(-frame_size, -frame_size, +frame_size, +frame_size);
-            }
-
-            d->drawFocusRing(p, frameRect, hMargin, vMargin);
         } else if (ffw) {
             const auto cs = ffw->testAttribute(Qt::WA_MacMiniSize) ? QStyleHelper::SizeMini :
                             ffw->testAttribute(Qt::WA_MacSmallSize) ? QStyleHelper::SizeSmall :
@@ -5444,9 +5430,7 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
     case CC_SpinBox:
         if (const QStyleOptionSpinBox *sb = qstyleoption_cast<const QStyleOptionSpinBox *>(opt)) {
             if (sb->frame && (sb->subControls & SC_SpinBoxFrame)) {
-                const int frame_size = qt_mac_aqua_get_metric(EditTextFrameOutset);
+                const auto lineEditRect = proxy()->subControlRect(CC_SpinBox, sb, SC_SpinBoxEditField, widget);
-                const auto lineEditRect = proxy()->subControlRect(CC_SpinBox, sb, SC_SpinBoxEditField, widget)
-                        .adjusted(-frame_size, -frame_size, +frame_size, +frame_size);
                 QStyleOptionFrame frame;
                 static_cast<QStyleOption &>(frame) = *opt;
                 frame.rect = lineEditRect;
@@ -6175,9 +6159,9 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
     case CC_SpinBox:
         if (const QStyleOptionSpinBox *spin = qstyleoption_cast<const QStyleOptionSpinBox *>(opt)) {
             QStyleHelper::WidgetSizePolicy aquaSize = d->effectiveAquaSizeConstrain(spin, widget);
+            const auto fw = proxy()->pixelMetric(PM_SpinBoxFrameWidth, spin, widget);
             int spinner_w;
             int spinBoxSep;
-            int fw = proxy()->pixelMetric(PM_SpinBoxFrameWidth, spin, widget);
             switch (aquaSize) {
             case QStyleHelper::SizeLarge:
                 spinner_w = 14;
@@ -6240,16 +6224,11 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
                 break;
             }
             case SC_SpinBoxEditField:
-                if (spin->buttonSymbols == QAbstractSpinBox::NoButtons) {
+                ret = spin->rect.adjusted(fw, fw, -fw, -fw);
-                    ret.setRect(fw, fw,
+                if (spin->buttonSymbols != QAbstractSpinBox::NoButtons) {
-                                spin->rect.width() - fw * 2,
+                    ret.setWidth(spin->rect.width() - spinBoxSep - spinner_w);
-                                spin->rect.height() - fw * 2);
+                    ret = visualRect(spin->direction, spin->rect, ret);
-                } else {
-                    ret.setRect(fw, fw,
-                                spin->rect.width() - fw * 2 - spinBoxSep - spinner_w,
-                                spin->rect.height() - fw * 2);
                 }
-                ret = visualRect(spin->direction, spin->rect, ret);
                 break;
             default:
                 ret = QCommonStyle::subControlRect(cc, spin, sc, widget);
@@ -6286,10 +6265,8 @@ QSize QMacStyle::sizeFromContents(ContentsType ct, const QStyleOption *opt,
 #if QT_CONFIG(spinbox)
     case CT_SpinBox:
         if (const QStyleOptionSpinBox *vopt = qstyleoption_cast<const QStyleOptionSpinBox *>(opt)) {
-            // Add button + frame widths
+            const int buttonWidth = 20; // FIXME Use subControlRect()
-            int buttonWidth = 20;
+            sz += QSize(buttonWidth, -3);
-            int fw = proxy()->pixelMetric(PM_SpinBoxFrameWidth, vopt, widget);
-            sz += QSize(buttonWidth + 2*fw, 2*fw - 3);
         }
         break;
 #endif

src/widgets/styles/qcommonstyle.cpp

@@ -5303,6 +5303,9 @@ int QCommonStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget
     case SH_ComboBox_AllowWheelScrolling:
         ret = true;
         break;
+    case SH_SpinBox_ButtonsInsideFrame:
+        ret = true;
+        break;
     default:
         ret = 0;
         break;

src/widgets/styles/qstyle.cpp

@@ -1997,6 +1997,10 @@ void QStyle::drawItemPixmap(QPainter *painter, const QRect &rect, int alignment,
            This is on by default in all styles except the Mac style.
            This enum value has been introduced in Qt 5.10.
 
+    \value SH_SpinBox_ButtonsInsideFrame
+           Determnines if the spin box buttons are inside the line edit frame.
+           This enum value has been introduced in Qt 5.11.
+
     \sa styleHint()
 */
 

src/widgets/styles/qstyle.h

@@ -740,6 +740,7 @@ public:
         SH_TitleBar_ShowToolTipsOnButtons,
         SH_Widget_Animation_Duration,
         SH_ComboBox_AllowWheelScrolling,
+        SH_SpinBox_ButtonsInsideFrame,
         // Add new style hint values here
 
         SH_CustomBase = 0xf0000000

src/widgets/widgets/qabstractspinbox.cpp

@@ -691,7 +691,7 @@ void QAbstractSpinBox::setLineEdit(QLineEdit *lineEdit)
     if (d->edit->parent() != this)
         d->edit->setParent(this);
 
-    d->edit->setFrame(false);
+    d->edit->setFrame(!style()->styleHint(QStyle::SH_SpinBox_ButtonsInsideFrame, nullptr, this));
     d->edit->setFocusProxy(this);
     d->edit->setAcceptDrops(false);
 
@@ -823,6 +823,8 @@ void QAbstractSpinBox::changeEvent(QEvent *event)
             d->spinClickTimerInterval = style()->styleHint(QStyle::SH_SpinBox_ClickAutoRepeatRate, 0, this);
             d->spinClickThresholdTimerInterval =
                 style()->styleHint(QStyle::SH_SpinBox_ClickAutoRepeatThreshold, 0, this);
+            if (d->edit)
+                d->edit->setFrame(!style()->styleHint(QStyle::SH_SpinBox_ButtonsInsideFrame, nullptr, this));
             d->reset();
             d->updateEditFieldGeometry();
             break;
@@ -1649,7 +1651,9 @@ void QAbstractSpinBox::initStyleOption(QStyleOptionSpinBox *option) const
     option->initFrom(this);
     option->activeSubControls = QStyle::SC_None;
     option->buttonSymbols = d->buttonSymbols;
-    option->subControls = QStyle::SC_SpinBoxFrame | QStyle::SC_SpinBoxEditField;
+    option->subControls = QStyle::SC_SpinBoxEditField;
+    if (!style()->styleHint(QStyle::SH_SpinBox_ButtonsInsideFrame, nullptr, this))
+        option->subControls |= QStyle::SC_SpinBoxFrame;
     if (d->buttonSymbols != QAbstractSpinBox::NoButtons) {
         option->subControls |= QStyle::SC_SpinBoxUp | QStyle::SC_SpinBoxDown;
         if (d->buttonState & Up) {