Introduce progressbar in QWindows11Style

Introduces Windows 11 styled progressbar to QWindows11Style drawn by QPainter.
The progress is indicated by a thicker line in accent color on a grey track.
Animation for indetermined progress is changed to follow the animation of Windows 11
progress bars.

Change-Id: Icac79fdbe40b82b10e1fd0e59b389890a7de6683
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

src/plugins/styles/modernwindows/qwindows11style.cpp

@@ -10,6 +10,8 @@
 #include <QGraphicsDropShadowEffect>
 
 #include "qdrawutil.h"
+#include <chrono>
+
 QT_BEGIN_NAMESPACE
 
 const static int topLevelRoundingRadius    = 8; //Radius for toplevel items like popups for round corners
@@ -718,6 +720,80 @@ void QWindows11Style::drawControl(ControlElement element, const QStyleOption *op
             }
         }
         break;
+    case QStyle::CE_ProgressBarGroove:{
+        if (const QStyleOptionProgressBar* progbaropt = qstyleoption_cast<const QStyleOptionProgressBar*>(option)) {
+            const QProgressBar* bar = qobject_cast<const QProgressBar*>(widget);
+            QRectF rect = subElementRect(SE_ProgressBarContents, progbaropt, widget);
+            QPointF center = rect.center();
+            if (bar->orientation() & Qt::Horizontal) {
+                rect.setHeight(1);
+                rect.moveTop(center.y());
+            } else {
+                rect.setWidth(1);
+                rect.moveLeft(center.x());
+            }
+            painter->setPen(Qt::NoPen);
+            painter->setBrush(Qt::gray);
+            painter->drawRoundedRect(rect, secondLevelRoundingRadius, secondLevelRoundingRadius);
+        }
+        break;
+    }
+    case QStyle::CE_ProgressBarContents:
+        if (const QStyleOptionProgressBar* progbaropt = qstyleoption_cast<const QStyleOptionProgressBar*>(option)) {
+            const QProgressBar* bar = qobject_cast<const QProgressBar*>(widget);
+            QRectF rect = subElementRect(SE_ProgressBarContents, progbaropt, widget);
+            QRectF originalRect = rect;
+            QPointF center = rect.center();
+            bool isIndeterminate = progbaropt->maximum == 0 && progbaropt->minimum == 0;
+            float fillPercentage = 0;
+
+            if (!isIndeterminate) {
+                fillPercentage = ((float(progbaropt->progress) - float(progbaropt->minimum)) / (float(progbaropt->maximum) - float(progbaropt->minimum)));
+                if (bar->orientation() == Qt::Horizontal) {
+                    rect.setHeight(4);
+                    rect.moveTop(center.y() - 1.5);
+                    rect.setWidth(rect.width() * fillPercentage);
+                } else {
+                    float oldHeight = rect.height();
+                    rect.setWidth(4);
+                    rect.moveLeft(center.x() - 1.5);
+                    rect.moveTop(oldHeight * (1.0f - fillPercentage));
+                    rect.setHeight(oldHeight * fillPercentage);
+                }
+            } else {
+                auto elapsedTime = std::chrono::time_point_cast<std::chrono::milliseconds>(std::chrono::system_clock::now());
+                fillPercentage = (elapsedTime.time_since_epoch().count() % 5000)/(5000.0f*0.75);
+                if (bar->orientation() == Qt::Horizontal) {
+                    float barBegin = qMin(qMax(fillPercentage-0.25,0.0) * rect.width(), float(rect.width()));
+                    float barEnd = qMin(fillPercentage * rect.width(), float(rect.width()));
+                    rect = QRect(QPoint(rect.left() + barBegin, rect.top()), QPoint(rect.left() + barEnd, rect.bottom()));
+                    rect.setHeight(4);
+                    rect.moveTop(center.y() - 1.5);
+                } else {
+                    float barBegin = qMin(qMax(fillPercentage-0.25,0.0) * rect.height(), float(rect.height()));
+                    float barEnd = qMin(fillPercentage * rect.height(), float(rect.height()));
+                    rect = QRect(QPoint(rect.left(), rect.bottom() - barEnd), QPoint(rect.right(), rect.bottom() - barBegin));
+                    rect.setWidth(4);
+                    rect.moveLeft(center.x() - 1.5);
+                }
+                const_cast<QWidget*>(widget)->update();
+            }
+            if (progbaropt->invertedAppearance && bar->orientation() == Qt::Horizontal)
+                rect.moveLeft(originalRect.width() * (1.0 - fillPercentage));
+            else if (progbaropt->invertedAppearance && bar->orientation() == Qt::Vertical)
+                rect.moveBottom(originalRect.height() * fillPercentage);
+            painter->setPen(Qt::NoPen);
+            painter->setBrush(progbaropt->palette.accent());
+            painter->drawRoundedRect(rect, secondLevelRoundingRadius, secondLevelRoundingRadius);
+        }
+        break;
+    case QStyle::CE_ProgressBarLabel:
+        if (const QStyleOptionProgressBar* progbaropt = qstyleoption_cast<const QStyleOptionProgressBar*>(option)) {
+            QRect rect = subElementRect(SE_ProgressBarLabel, progbaropt, widget);
+            painter->setPen(progbaropt->palette.text().color());
+            painter->drawText(rect, progbaropt->text,Qt::AlignVCenter|Qt::AlignLeft);
+        }
+        break;
     case CE_PushButtonLabel:
         if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(option))  {
             QRect textRect = btn->rect;

src/plugins/styles/modernwindows/qwindows11style_p.h

@@ -29,7 +29,6 @@ class QWindows11Style : public QWindowsVistaStyle
 public:
     QWindows11Style();
     ~QWindows11Style() override;
-
     void drawComplexControl(ComplexControl control, const QStyleOptionComplex *option,
                             QPainter *painter, const QWidget *widget) const override;
     void drawPrimitive(PrimitiveElement element, const QStyleOption *option,