SvgWidget and SvgToolButton spinning animation support

src/Insight/UserInterfaces/InsightWindow/Widgets/SvgToolButton.hpp

@@ -56,6 +56,13 @@ namespace Bloom::Widgets
             return this->buttonHeight;
         }
 
+        void startSpin() {
+            this->svgWidget->startSpin();
+        }
+
+        void stopSpin() {
+            this->svgWidget->stopSpin();
+        }
     protected:
         void childEvent(QChildEvent* childEvent) override;
 

src/Insight/UserInterfaces/InsightWindow/Widgets/SvgWidget.cpp

@@ -9,6 +9,28 @@ SvgWidget::SvgWidget(QWidget* parent): QFrame(parent) {
     this->renderer.setAspectRatioMode(Qt::AspectRatioMode::KeepAspectRatioByExpanding);
 }
 
+void SvgWidget::startSpin() {
+    if (this->spinningAnimation == nullptr) {
+        this->spinningAnimation = new QPropertyAnimation(this, "angle", this);
+        this->spinningAnimation->setDuration(2000);
+        this->spinningAnimation->setStartValue(0);
+        this->spinningAnimation->setEndValue(360);
+
+        QObject::connect(this->spinningAnimation, &QPropertyAnimation::finished, this, [this] {
+            this->spinningAnimation->start();
+        });
+    }
+
+    this->spinningAnimation->start();
+}
+
+void SvgWidget::stopSpin() {
+    if (this->spinningAnimation != nullptr) {
+        this->spinningAnimation->stop();
+        this->setAngle(0);
+    }
+}
+
 void SvgWidget::paintEvent(QPaintEvent* paintEvent) {
     auto painter = QPainter(this);
     auto svgSize = this->renderer.defaultSize();

src/Insight/UserInterfaces/InsightWindow/Widgets/SvgWidget.hpp

@@ -5,6 +5,7 @@
 #include <QString>
 #include <QEvent>
 #include <QSize>
+#include <QPropertyAnimation>
 
 namespace Bloom::Widgets
 {
@@ -57,12 +58,29 @@ namespace Bloom::Widgets
 
         void setAngle(int angle) {
             this->angle = angle;
+
+            if (this->spinningAnimation != nullptr) {
+                this->update();
+            }
         }
 
         [[nodiscard]] int getAngle() const {
             return this->angle;
         }
 
+        /**
+         * Starts a spinning animation, where the widget will rotate on its center, indefinitely.
+         *
+         * This is typically used in SvgToolButton instances, where the spinning of the tool button icon indicates
+         * some action being in progress (see the refresh tool button in the TargetMemoryInspectionPane widget).
+         */
+        void startSpin();
+
+        /**
+         * Stops the spinning animation.
+         */
+        void stopSpin();
+
     protected:
         void paintEvent(QPaintEvent* paintEvent) override;
         void changeEvent(QEvent* event) override;
@@ -74,5 +92,6 @@ namespace Bloom::Widgets
         int containerWidth = 0;
         int containerHeight = 0;
         int angle = 0;
+        QPropertyAnimation* spinningAnimation = nullptr;
     };
 }