New rotatable label widget

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

@@ -0,0 +1,63 @@
+#include "RotatableLabel.hpp"
+
+#include <QPainter>
+
+#include "src/Logger/Logger.hpp"
+
+using namespace Bloom::Widgets;
+
+void RotatableLabel::paintEvent(QPaintEvent* event) {
+    auto painter = QPainter(this);
+    static auto containerSize = this->getContainerSize();
+    static auto textSize = QLabel::minimumSizeHint();
+    static auto margins = this->contentsMargins();
+    painter.setClipRect(0, 0, containerSize.width(), containerSize.height());
+    painter.save();
+    painter.setPen(Qt::PenStyle::SolidLine);
+    painter.setPen(QColor("#afb1b3"));
+    painter.translate(std::ceil(containerSize.width() / 2), std::ceil(containerSize.height() / 2));
+    painter.rotate(this->angle);
+    painter.drawText(
+        -(textSize.width() / 2) + margins.left(),
+        (textSize.height() / 2) + margins.top(),
+        this->text()
+    );
+
+    painter.restore();
+}
+
+QSize RotatableLabel::getContainerSize() const {
+    auto size = QSize();
+    auto textSize = QLabel::sizeHint();
+
+    if (this->angle % 360 == 0 || this->angle % 180 == 0) {
+        size = textSize;
+
+    } else if (this->angle % 90 == 0) {
+        size.setHeight(textSize.width());
+        size.setWidth(textSize.height());
+
+    } else {
+        auto angle = this->angle;
+
+        if (angle > 90) {
+            float angleMultiplier = static_cast<float>(angle) / 90;
+            angleMultiplier = static_cast<float>(angleMultiplier) - std::floor(angleMultiplier);
+            angle = static_cast<int>(90 * angleMultiplier);
+        }
+
+        auto angleRadians = angle * (M_PI / 180);
+
+        size.setWidth(static_cast<int>(
+            std::cos(angleRadians) * textSize.width()
+            + std::ceil(std::sin(angleRadians) * textSize.height())
+        ))
+        ;
+        size.setHeight(static_cast<int>(
+            std::sin(angleRadians) * textSize.width()
+            + std::ceil(std::cos(angleRadians) * textSize.height())
+        ));
+    }
+
+    return size;
+}