| 236 | } |
| 237 | |
| 238 | void MoveAndZoomableView::wheelEvent(QWheelEvent *event) |
| 239 | { |
| 240 | #if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0) |
| 241 | auto p = event->position().toPoint(); |
| 242 | #else |
| 243 | auto p = event->pos(); |
| 244 | #endif |
| 245 | |
| 246 | DEBUG_VIEW("MoveAndZoomableView::wheelEvent delta " << event->angleDelta().y() << " pos " << p); |
| 247 | |
| 248 | auto deltaAbs = std::abs(event->angleDelta().y()); |
| 249 | auto deltaPositive = event->angleDelta().y() > 0; |
| 250 | auto noAction = (this->viewAction == ViewAction::NONE); |
| 251 | if (noAction && deltaAbs > 0) |
| 252 | { |
| 253 | auto deltaScaled = (double(deltaAbs) / 120); |
| 254 | auto deltaFactor = (deltaPositive) ? 1.0 + deltaScaled : 1.0 - deltaScaled / 2; |
| 255 | auto newZoomFactor = this->zoomFactor * deltaFactor; |
| 256 | this->zoom(ZoomMode::TO_VALUE, p, newZoomFactor); |
| 257 | } |
| 258 | |
| 259 | event->accept(); |
| 260 | } |
| 261 | |
| 262 | void MoveAndZoomableView::keyPressEvent(QKeyEvent *event) |
| 263 | { |