67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
#include "RotatableLabel.hpp"
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#include <QPainter>
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namespace Bloom::Widgets
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{
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void RotatableLabel::paintEvent(QPaintEvent* event) {
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auto painter = QPainter(this);
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const auto containerSize = this->getContainerSize();
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const auto textSize = QLabel::minimumSizeHint();
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const auto margins = this->contentsMargins();
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painter.setClipRect(0, 0, containerSize.width(), containerSize.height());
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painter.save();
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painter.setPen(Qt::PenStyle::SolidLine);
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painter.setPen(QColor(this->isEnabled() ? "#afb1b3" : "#808484"));
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painter.translate(std::ceil(containerSize.width() / 2), std::ceil(containerSize.height() / 2));
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painter.rotate(this->angle);
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painter.drawText(
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-(containerSize.height() / 2) + margins.left(),
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-(textSize.height() / 2) + margins.top(),
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textSize.width(),
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textSize.height(),
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Qt::AlignTop,
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this->text()
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);
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painter.restore();
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}
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QSize RotatableLabel::getContainerSize() const {
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auto size = QSize();
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auto textSize = QLabel::sizeHint();
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if (this->angle % 360 == 0 || this->angle % 180 == 0) {
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size = textSize;
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} else if (this->angle % 90 == 0) {
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size.setHeight(textSize.width());
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size.setWidth(textSize.height());
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} else {
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auto angle = this->angle;
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if (angle > 90) {
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float angleMultiplier = static_cast<float>(angle) / 90;
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angleMultiplier = static_cast<float>(angleMultiplier) - std::floor(angleMultiplier);
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angle = static_cast<int>(90 * angleMultiplier);
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}
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auto angleRadians = angle * (M_PI / 180);
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size.setWidth(static_cast<int>(
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std::cos(angleRadians) * textSize.width()
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+ std::ceil(std::sin(angleRadians) * textSize.height())
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))
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;
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size.setHeight(static_cast<int>(
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std::sin(angleRadians) * textSize.width()
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+ std::ceil(std::cos(angleRadians) * textSize.height())
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));
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}
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return size;
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}
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}
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