Fixed Bug 1829931: calculation of zoom level in Window_Zoom(), so we show more...

Fixed Bug 1829931: calculation of zoom level in Window_Zoom(), so we show more rather than less for a box-zoom.

share/zoom.cpp

@@ -130,8 +130,9 @@ void WinEDA_DrawFrame::Window_Zoom( EDA_Rect& Rect )
     /* Compute the best zoom */
     Rect.Normalize();
     size     = DrawPanel->GetClientSize();
-    ii       = Rect.GetSize().x / size.x;
-    jj       = Rect.GetSize().y / size.y;
+    // Overestimate zoom level, i. e. show more than selected rather than less.
+    ii       = static_cast<int>( ceil(1.0 * Rect.GetSize().x / size.x) );
+    jj       = static_cast<int>( ceil(1.0 * Rect.GetSize().y / size.y) );
     bestzoom = MAX( ii, jj );
     if( bestzoom <= 0 )
         bestzoom = 1;