1.QOpenGLWidgetè½ä½ä¸ºQGraphicsViewçviewportç¨å
QOpenGLWidgetè½ä½ä¸ºQGraphicsViewçviewportç¨å
QOpenGLWidgetè½ä½ä¸ºQGraphicsViewçviewportç¨
个人å¨çqwt ä¸çsvgmapæ ·ä¾æ¶ï¼æ¾å¤§ç¼©å°çä½ç½®çæºä»£ç æ¥å°å¨åªéåºç°ï¼ä½å ³äºç§»å¨å´æ¾äºä¸éµï¼ä¸ç¥éå®çæºä»£ç å¨åªéåºç°ï¼ä»è·è¸ªæ åµæ¥çï¼å¨void QwtMagnifier::widgetMouseMoveEvent( QMouseEvent *mouseEvent )ä¸æ²¡ææ§è¡ï¼æææï¼ã
ããåæ¥æ¥çäºQTèªå¸¦æ ·ä¾ï¼imageviewerï¼æè§ä¸Scrollç¸å ³ï¼ç±äºéè¦æ¾ç¤ºï¼ä¸Viewç¸å ³ï¼ææ¶å°±ä¸çGraphicsScenceäº.
å¨void QGraphicsView::mouseMoveEvent(QMouseEvent *event)ä¸ï¼ç»è·è¸ªåç°ä¸ä¸é¢å¸¦ç æå ³ï¼
if (d->dragMode == QGraphicsView::ScrollHandDrag) {
if (d->handScrolling) {
QScrollBar *hBar = horizontalScrollBar();
QScrollBar *vBar = verticalScrollBar();
QPoint delta = event->pos() - d->lastMouseEvent.pos();
hBar->setValue(hBar->value() + (isRightToLeft() ?源码gcn源码下载 delta.x() : -delta.x()));
vBar->setValue(vBar->value() - delta.y());
// Detect how much we've scrolled to disambiguate scrolling from
// clicking.
++d->handScrollMotions;
}
}
d->mouseMoveEventHandler(event);
}