[Seq-cvs-commit] SF.net SVN: seq:[1302] showeq/branches/cn187_devel/src

[<cn...@us...>]

Revision: 1302
          http://sourceforge.net/p/seq/svn/1302
Author:   cn187
Date:     2022-11-29 23:33:51 +0000 (Tue, 29 Nov 2022)
Log Message:
-----------
Add ability to zoom map via mouse wheel

Modified Paths:
--------------
    showeq/branches/cn187_devel/src/map.cpp
    showeq/branches/cn187_devel/src/map.h

Modified: showeq/branches/cn187_devel/src/map.cpp
===================================================================
--- showeq/branches/cn187_devel/src/map.cpp	2022-11-29 04:00:43 UTC (rev 1301)
+++ showeq/branches/cn187_devel/src/map.cpp	2022-11-29 23:33:51 UTC (rev 1302)
@@ -2077,6 +2077,36 @@
   }
 }
 
+
+void Map::wheelEvent( QWheelEvent * ev)
+{
+    int deltaY = 0;
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
+    deltaY = ev->angleDelta().y();
+#else
+    deltaY = ev->delta();
+#endif
+
+    //y is verticle, x is horizontal
+    //we only handle vertical scroll for zoom in/out.
+    //ignore anything else so it can be handled by parent.
+    if (deltaY > 0)
+    {
+        setZoom(zoom() + 1);
+        ev->accept();
+        return;
+    }
+    else if (deltaY < 0)
+    {
+        setZoom(zoom() - 1);
+        ev->accept();
+        return;
+    }
+
+    ev->ignore();
+}
+
 void Map::zoomIn()
 {
 #ifdef DEBUGMAP

Modified: showeq/branches/cn187_devel/src/map.h
===================================================================
--- showeq/branches/cn187_devel/src/map.h	2022-11-29 04:00:43 UTC (rev 1301)
+++ showeq/branches/cn187_devel/src/map.h	2022-11-29 23:33:51 UTC (rev 1302)
@@ -578,6 +578,7 @@
    void mouseMoveEvent( QMouseEvent* );
    void mouseReleaseEvent( QMouseEvent *);
    void mouseDoubleClickEvent( QMouseEvent *);
+   void wheelEvent( QWheelEvent *);
    void resizeEvent (QResizeEvent *);
 
    void paintMap (QPainter *);

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