diff options
Diffstat (limited to 'examples/widgets/gestures/imagegestures/imagewidget.cpp')
-rw-r--r-- | examples/widgets/gestures/imagegestures/imagewidget.cpp | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/examples/widgets/gestures/imagegestures/imagewidget.cpp b/examples/widgets/gestures/imagegestures/imagewidget.cpp index 38319a9dbe..3d0d7e7a93 100644 --- a/examples/widgets/gestures/imagegestures/imagewidget.cpp +++ b/examples/widgets/gestures/imagegestures/imagewidget.cpp @@ -77,6 +77,7 @@ bool ImageWidget::event(QEvent *event) } //! [event handler] +//! [paint method] void ImageWidget::paintEvent(QPaintEvent*) { QPainter p(this); @@ -93,6 +94,7 @@ void ImageWidget::paintEvent(QPaintEvent*) p.translate(-iw/2, -ih/2); p.drawImage(0, 0, currentImage); } +//! [paint method] void ImageWidget::mouseDoubleClickEvent(QMouseEvent *) { @@ -138,16 +140,20 @@ void ImageWidget::panTriggered(QPanGesture *gesture) update(); } +//! [pinch function] void ImageWidget::pinchTriggered(QPinchGesture *gesture) { QPinchGesture::ChangeFlags changeFlags = gesture->changeFlags(); if (changeFlags & QPinchGesture::RotationAngleChanged) { - rotationAngle += gesture->rotationAngle() - gesture->lastRotationAngle(); - qCDebug(lcExample) << "pinchTriggered(): rotate to" << rotationAngle; + qreal rotationDelta = gesture->rotationAngle() - gesture->lastRotationAngle(); + rotationAngle += rotationDelta; + qCDebug(lcExample) << "pinchTriggered(): rotate by" << + rotationDelta << "->" << rotationAngle; } if (changeFlags & QPinchGesture::ScaleFactorChanged) { currentStepScaleFactor = gesture->totalScaleFactor(); - qCDebug(lcExample) << "pinchTriggered(): zoom by" << gesture->scaleFactor() << "->" << currentStepScaleFactor; + qCDebug(lcExample) << "pinchTriggered(): zoom by" << + gesture->scaleFactor() << "->" << currentStepScaleFactor; } if (gesture->state() == Qt::GestureFinished) { scaleFactor *= currentStepScaleFactor; @@ -155,6 +161,7 @@ void ImageWidget::pinchTriggered(QPinchGesture *gesture) } update(); } +//! [pinch function] //! [swipe function] void ImageWidget::swipeTriggered(QSwipeGesture *gesture) |