Use wxMBConvUTF8 when G_FILENAME_ENCODING is UTF-8, and set

[wxWidgets.git] / src / generic / vscroll.cpp

diff --git a/src/generic/vscroll.cpp b/src/generic/vscroll.cpp
index e7cb8cfa06c9d7d4afc6747edbefbff5bd735dbd..d8d57b6e97f46986d00bdef1bc229bdb4a5f1d4b 100644 (file)
--- a/src/generic/vscroll.cpp
+++ b/src/generic/vscroll.cpp
@@ -17,6 +17,17 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // 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"
 
 // ----------------------------------------------------------------------------
 #include "wx/vscroll.h"
 
 // ----------------------------------------------------------------------------


@@ -26,6 +37,9 @@
 BEGIN_EVENT_TABLE(wxVScrolledWindow, wxPanel)
     EVT_SIZE(wxVScrolledWindow::OnSize)
     EVT_SCROLLWIN(wxVScrolledWindow::OnScroll)
 BEGIN_EVENT_TABLE(wxVScrolledWindow, wxPanel)
     EVT_SIZE(wxVScrolledWindow::OnSize)
     EVT_SCROLLWIN(wxVScrolledWindow::OnScroll)

+#if wxUSE_MOUSEWHEEL
+    EVT_MOUSEWHEEL(wxVScrolledWindow::OnMouseWheel)
+#endif

 END_EVENT_TABLE()
 
 
 END_EVENT_TABLE()
 
 


@@ -33,6 +47,8 @@ END_EVENT_TABLE()
 // implementation
 // ============================================================================
 
 // implementation
 // ============================================================================
 

+IMPLEMENT_ABSTRACT_CLASS(wxVScrolledWindow, wxPanel)
+

 // ----------------------------------------------------------------------------
 // initialization
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // initialization
 // ----------------------------------------------------------------------------


@@ -47,12 +63,48 @@ void wxVScrolledWindow::Init()
     m_nVisible = 1;
 
     m_heightTotal = 0;
     m_nVisible = 1;
 
     m_heightTotal = 0;

+
+#if wxUSE_MOUSEWHEEL
+    m_sumWheelRotation = 0;
+#endif

 }
 
 // ----------------------------------------------------------------------------
 // various helpers
 // ----------------------------------------------------------------------------
 
 }
 
 // ----------------------------------------------------------------------------
 // various helpers
 // ----------------------------------------------------------------------------
 

+wxCoord wxVScrolledWindow::EstimateTotalHeight() const
+{
+    // estimate the total height: it is impossible to call
+    // OnGetLineHeight() for every line because there may be too many of
+    // them, so we just make a guess using some lines in the beginning,
+    // some in the end and some in the middle
+    static const size_t NUM_LINES_TO_SAMPLE = 10;
+
+    wxCoord heightTotal;
+    if ( m_lineMax < 3*NUM_LINES_TO_SAMPLE )
+    {
+        // in this case calculating exactly is faster and more correct than
+        // guessing
+        heightTotal = GetLinesHeight(0, m_lineMax);
+    }
+    else // too many lines to calculate exactly
+    {
+        // look at some lines in the beginning/middle/end
+        heightTotal =
+            GetLinesHeight(0, NUM_LINES_TO_SAMPLE) +
+                GetLinesHeight(m_lineMax - NUM_LINES_TO_SAMPLE, m_lineMax) +
+                    GetLinesHeight(m_lineMax/2 - NUM_LINES_TO_SAMPLE/2,
+                                   m_lineMax/2 + NUM_LINES_TO_SAMPLE/2);
+
+        // use the height of the lines we looked as the average
+        heightTotal = (wxCoord)
+                (((float)heightTotal / (3*NUM_LINES_TO_SAMPLE)) * m_lineMax);
+    }
+
+    return heightTotal;
+}
+

 wxCoord wxVScrolledWindow::GetLinesHeight(size_t lineMin, size_t lineMax) const
 {
     if ( lineMin == lineMax )
 wxCoord wxVScrolledWindow::GetLinesHeight(size_t lineMin, size_t lineMax) const
 {
     if ( lineMin == lineMax )


@@ -74,7 +126,7 @@ wxCoord wxVScrolledWindow::GetLinesHeight(size_t lineMin, size_t lineMax) const
     return height;
 }
 
     return height;
 }
 

-size_t wxVScrolledWindow::FindFirstFromBottom(size_t lineLast)
+size_t wxVScrolledWindow::FindFirstFromBottom(size_t lineLast, bool full)

 {
     const wxCoord hWindow = GetClientSize().y;
 
 {
     const wxCoord hWindow = GetClientSize().y;
 


@@ -88,7 +140,13 @@ size_t wxVScrolledWindow::FindFirstFromBottom(size_t lineLast)
 
         if ( h > hWindow )
         {
 
         if ( h > hWindow )
         {

-            lineFirst++;
+            // for this line to be fully visible we need to go one line
+            // down, but if it is enough for it to be only partly visible then
+            // this line will do as well
+            if ( full )
+            {
+                lineFirst++;
+            }

 
             break;
         }
 
             break;
         }


@@ -141,33 +199,8 @@ void wxVScrolledWindow::SetLineCount(size_t count)
     // save the number of lines
     m_lineMax = count;
 
     // save the number of lines
     m_lineMax = count;
 

-
-    // estimate the total height: it is impossible to call
-    // OnGetLineHeight() for every line because there may be too many of
-    // them, so we just make a guess using some lines in the beginning,
-    // some in the end and some in the middle
-    static const size_t NUM_LINES_TO_SAMPLE = 10;
-
-    if ( count < 3*NUM_LINES_TO_SAMPLE )
-    {
-        // in this case calculating exactly is faster and more correct than
-        // guessing
-        m_heightTotal = GetLinesHeight(0, m_lineMax);
-    }
-    else // too many lines to calculate exactly
-    {
-        // look at some lines in the beginning/middle/end
-        m_heightTotal =
-            GetLinesHeight(0, NUM_LINES_TO_SAMPLE) +
-                GetLinesHeight(count - NUM_LINES_TO_SAMPLE, count) +
-                    GetLinesHeight(count/2 - NUM_LINES_TO_SAMPLE/2,
-                                   count/2 + NUM_LINES_TO_SAMPLE/2);
-
-        // use the height of the lines we looked as the average
-        m_heightTotal = ((float)m_heightTotal / (3*NUM_LINES_TO_SAMPLE)) *
-                            m_lineMax;
-    }
-
+    // and our estimate for their total height
+    m_heightTotal = EstimateTotalHeight();

 
     // recalculate the scrollbars parameters
     m_lineFirst = 1;    // make sure it is != 0
 
     // recalculate the scrollbars parameters
     m_lineFirst = 1;    // make sure it is != 0


@@ -196,6 +229,42 @@ void wxVScrolledWindow::RefreshLine(size_t line)
     RefreshRect(rect);
 }
 
     RefreshRect(rect);
 }
 

+void wxVScrolledWindow::RefreshLines(size_t from, size_t to)
+{
+    wxASSERT_MSG( from <= to, _T("RefreshLines(): empty range") );
+
+    // clump the range to just the visible lines -- it is useless to refresh
+    // the other ones
+    if ( from < GetFirstVisibleLine() )
+        from = GetFirstVisibleLine();
+
+    if ( to > GetLastVisibleLine() )
+        to = GetLastVisibleLine();
+
+    // calculate the rect occupied by these lines on screen
+    wxRect rect;
+    rect.width = GetClientSize().x;
+    for ( size_t nBefore = GetFirstVisibleLine(); nBefore < from; nBefore++ )
+    {
+        rect.y += OnGetLineHeight(nBefore);
+    }
+
+    for ( size_t nBetween = from; nBetween <= to; nBetween++ )
+    {
+        rect.height += OnGetLineHeight(nBetween);
+    }
+
+    // do refresh it
+    RefreshRect(rect);
+}
+
+void wxVScrolledWindow::RefreshAll()
+{
+    UpdateScrollbar();
+
+    Refresh();
+}
+

 int wxVScrolledWindow::HitTest(wxCoord WXUNUSED(x), wxCoord y) const
 {
     const size_t lineMax = GetLastVisibleLine();
 int wxVScrolledWindow::HitTest(wxCoord WXUNUSED(x), wxCoord y) const
 {
     const size_t lineMax = GetLastVisibleLine();


@@ -223,7 +292,7 @@ bool wxVScrolledWindow::ScrollToLine(size_t line)
 
     // determine the real first line to scroll to: we shouldn't scroll beyond
     // the end
 
     // determine the real first line to scroll to: we shouldn't scroll beyond
     // the end

-    size_t lineFirstLast = FindFirstFromBottom(m_lineMax - 1);
+    size_t lineFirstLast = FindFirstFromBottom(m_lineMax - 1, true);

     if ( line > lineFirstLast )
         line = lineFirstLast;
 
     if ( line > lineFirstLast )
         line = lineFirstLast;
 


@@ -312,6 +381,7 @@ void wxVScrolledWindow::OnScroll(wxScrollWinEvent& event)
     size_t lineFirstNew;
 
     const wxEventType evtType = event.GetEventType();
     size_t lineFirstNew;
 
     const wxEventType evtType = event.GetEventType();

+

     if ( evtType == wxEVT_SCROLLWIN_TOP )
     {
         lineFirstNew = 0;
     if ( evtType == wxEVT_SCROLLWIN_TOP )
     {
         lineFirstNew = 0;


@@ -336,23 +406,47 @@ void wxVScrolledWindow::OnScroll(wxScrollWinEvent& event)
     {
         lineFirstNew = GetLastVisibleLine();
     }
     {
         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);
     }
 
     ScrollToLine(lineFirstNew);

+
+#ifdef __WXMAC__
+    Update();
+#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