X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1e0af0bcdaedd6cb7a0d49f7752905e8bc3415cd..a6c91f7da9cd1edc4884f915632a74c1078477b3:/src/generic/vscroll.cpp

diff --git a/src/generic/vscroll.cpp b/src/generic/vscroll.cpp
index 87d6f32338..d8d57b6e97 100644
--- a/src/generic/vscroll.cpp
+++ b/src/generic/vscroll.cpp
@@ -17,6 +17,17 @@
 // headers
 // ----------------------------------------------------------------------------
 
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+#pragma implementation "vscroll.h"
+#endif
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
 #include "wx/vscroll.h"
 
 // ----------------------------------------------------------------------------
@@ -26,6 +37,9 @@
 BEGIN_EVENT_TABLE(wxVScrolledWindow, wxPanel)
     EVT_SIZE(wxVScrolledWindow::OnSize)
     EVT_SCROLLWIN(wxVScrolledWindow::OnScroll)
+#if wxUSE_MOUSEWHEEL
+    EVT_MOUSEWHEEL(wxVScrolledWindow::OnMouseWheel)
+#endif
 END_EVENT_TABLE()
 
 
@@ -33,6 +47,8 @@ END_EVENT_TABLE()
 // implementation
 // ============================================================================
 
+IMPLEMENT_ABSTRACT_CLASS(wxVScrolledWindow, wxPanel)
+
 // ----------------------------------------------------------------------------
 // initialization
 // ----------------------------------------------------------------------------
@@ -47,6 +63,10 @@ void wxVScrolledWindow::Init()
     m_nVisible = 1;
 
     m_heightTotal = 0;
+
+#if wxUSE_MOUSEWHEEL
+    m_sumWheelRotation = 0;
+#endif
 }
 
 // ----------------------------------------------------------------------------
@@ -79,7 +99,7 @@ wxCoord wxVScrolledWindow::EstimateTotalHeight() const
 
         // use the height of the lines we looked as the average
         heightTotal = (wxCoord)
-                (((float)m_heightTotal / (3*NUM_LINES_TO_SAMPLE)) * m_lineMax);
+                (((float)heightTotal / (3*NUM_LINES_TO_SAMPLE)) * m_lineMax);
     }
 
     return heightTotal;
@@ -361,6 +381,7 @@ void wxVScrolledWindow::OnScroll(wxScrollWinEvent& event)
     size_t lineFirstNew;
 
     const wxEventType evtType = event.GetEventType();
+
     if ( evtType == wxEVT_SCROLLWIN_TOP )
     {
         lineFirstNew = 0;
@@ -385,21 +406,19 @@ void wxVScrolledWindow::OnScroll(wxScrollWinEvent& event)
     {
         lineFirstNew = GetLastVisibleLine();
     }
-    else // unknown scroll event?
+    else if ( evtType == wxEVT_SCROLLWIN_THUMBRELEASE )
     {
-        if ( evtType == wxEVT_SCROLLWIN_THUMBRELEASE )
-        {
-            lineFirstNew = event.GetPosition();
-        }
-        else
-        {
-            wxASSERT_MSG( evtType == wxEVT_SCROLLWIN_THUMBTRACK,
-                            _T("unknown scroll event type?") );
+        lineFirstNew = event.GetPosition();
+    }
+    else if ( evtType == wxEVT_SCROLLWIN_THUMBTRACK )
+    {
+        lineFirstNew = event.GetPosition();
+    }
 
-            // don't do anything, otherwise dragging the thumb around would
-            // be too slow
-            return;
-        }
+    else // unknown scroll event?
+    {
+        wxFAIL_MSG( _T("unknown scroll event type?") );
+        return;
     }
 
     ScrollToLine(lineFirstNew);
@@ -409,3 +428,25 @@ void wxVScrolledWindow::OnScroll(wxScrollWinEvent& event)
 #endif // __WXMAC__
 }
 
+#if wxUSE_MOUSEWHEEL
+
+void wxVScrolledWindow::OnMouseWheel(wxMouseEvent& event)
+{
+    m_sumWheelRotation += event.GetWheelRotation();
+    int delta = event.GetWheelDelta();
+
+    // how much to scroll this time
+    int units_to_scroll = -(m_sumWheelRotation/delta);
+    if ( !units_to_scroll )
+        return;
+
+    m_sumWheelRotation += units_to_scroll*delta;
+
+    if ( !event.IsPageScroll() )
+        ScrollLines( units_to_scroll*event.GetLinesPerAction() );
+    else
+        // scroll pages instead of lines
+        ScrollPages( units_to_scroll );
+}
+
+#endif