Added first project implementation

2024-01-22 18:45:09 +09:00
parent 065decd584
commit 9e957f29fe
12 changed files with 893 additions and 0 deletions
--- a/InteractiveChartView.cpp
+++ b/InteractiveChartView.cpp
@@ -0,0 +1,22 @@
+#include "InteractiveChartView.h"
+
+void InteractiveChartView::wheelEvent(QWheelEvent* event)
+{
+    qreal factor;
+    if (event->delta() > 0)
+        factor = 2.0;
+    else
+        factor = 0.5;
+
+    QRectF r = QRectF(chart()->plotArea().left(),
+                      chart()->plotArea().top(),
+                      chart()->plotArea().width() / factor,
+                      chart()->plotArea().height() / factor);
+    QPointF mousePos = mapFromGlobal(QCursor::pos());
+    r.moveCenter(mousePos);
+    chart()->zoomIn(r);
+    QPointF delta = chart()->plotArea().center() - mousePos;
+    chart()->scroll(delta.x(), -delta.y());
+
+    QChartView::wheelEvent(event);
+}