torstenandCopilot
d6b6ffce7c
- Formatted all CodeGen module files (9 files) - Formatted LtsAppDescriptor module files - Formatted LtsAppManager/AppChooser files - Applied clang-format to all DTC and enum headers across modules - Removed coordTransTests from CommonUnitTestsPlaceholder (moved to tests/) Cosmetic changes only, no functional modifications. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
123 lines
2.9 KiB
C++
123 lines
2.9 KiB
C++
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#include "lts_image_cropper.h"
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#include <QApplication>
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#include <QGraphicsItem>
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#include <QMouseEvent>
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namespace LtsWidgets
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{
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LtsImageCropper::LtsImageCropper(QWidget* parent, const QSize& size, const QPixmap& pixmap)
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: QGraphicsView(parent), m_scene(new QGraphicsScene(this)), m_maxScale(2.0f), m_multiplier(1.0f)
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{
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if (!size.isNull())
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setFixedSize(size);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setFrameStyle(QFrame::NoFrame);
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setDragMode(QGraphicsView::ScrollHandDrag);
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setTransformationAnchor(QGraphicsView::AnchorViewCenter);
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m_scene->setBackgroundBrush(Qt::Dense6Pattern);
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setScene(m_scene);
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setPixmap(pixmap);
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}
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LtsImageCropper::~LtsImageCropper()
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{
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delete m_pixmapItem;
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}
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void LtsImageCropper::setPixmap(const QPixmap& pixmap)
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{
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if (pixmap.isNull())
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return;
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delete m_pixmapItem;
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m_pixmapItem = new QGraphicsPixmapItem(pixmap);
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m_scene->addItem(m_pixmapItem);
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setTransform(QTransform());
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m_currentZoom = 1.0;
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double sx = static_cast<double>(size().height()) / pixmap.height();
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double sy = static_cast<double>(size().width()) / pixmap.width();
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if (sx > 1)
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scale(sx, sx);
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if (sy > 1)
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scale(sy, sy);
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double ratioWidth = 1.0 * size().width() / pixmap.width();
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double ratioHeight = 1.0 * size().height() / pixmap.height();
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m_minScale = qMax(ratioHeight, ratioWidth);
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calculateScaleStep();
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m_scene->setSceneRect(pixmap.rect());
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centerOn(m_scene->sceneRect().center());
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}
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void LtsImageCropper::setImage(const QImage& image)
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{
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setPixmap(QPixmap::fromImage(image));
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}
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void LtsImageCropper::setMultiplier(double multiplier)
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{
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m_multiplier = multiplier;
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calculateScaleStep();
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}
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void LtsImageCropper::calculateScaleStep()
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{
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m_stepScale = (m_maxScale - m_minScale) / 100.0;
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}
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QImage LtsImageCropper::image()
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{
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return grab().toImage();
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}
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void LtsImageCropper::wheelEvent(QWheelEvent* event)
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{
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if (!m_pixmapItem)
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return;
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auto value = event->pixelDelta();
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if (value.isNull())
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value = event->angleDelta() / 15.0;
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double scrollZoom = m_stepScale * value.y() * m_multiplier / 8.0;
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m_currentZoom += scrollZoom;
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if (m_currentZoom > m_maxScale)
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m_currentZoom = m_maxScale;
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else if (m_currentZoom < m_minScale)
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m_currentZoom = m_minScale;
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setTransform(QTransform(m_currentZoom, transform().m12(), transform().m13(), transform().m21(), m_currentZoom,
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transform().m23(), transform().m31(), transform().m32(), 1));
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}
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void LtsImageCropper::mousePressEvent(QMouseEvent* event)
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{
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QApplication::setOverrideCursor(Qt::DragMoveCursor);
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update();
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QGraphicsView::mousePressEvent(event);
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}
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void LtsImageCropper::mouseReleaseEvent(QMouseEvent* event)
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{
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QApplication::restoreOverrideCursor();
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update();
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QGraphicsView::mouseReleaseEvent(event);
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}
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} // namespace LtsWidgets
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