X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2b5f62a0b2db198609b45dec622a018dae37008e..80acaf25836e222cb9f39f2fbc5c236a1bba0d98:/src/generic/scrlwing.cpp

diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp
index f65fb4b487..deea726fb6 100644
--- a/src/generic/scrlwing.cpp
+++ b/src/generic/scrlwing.cpp
@@ -7,7 +7,7 @@
 // Created:     01/02/97
 // RCS-ID:      $Id$
 // Copyright:   (c) wxWindows team
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
@@ -18,7 +18,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
     #pragma implementation "genscrolwin.h"
 #endif
 
@@ -40,8 +40,11 @@
 
 #include "wx/scrolwin.h"
 #include "wx/panel.h"
+#if wxUSE_TIMER
 #include "wx/timer.h"
+#endif
 #include "wx/sizer.h"
+#include "wx/recguard.h"
 
 #ifdef __WXMSW__
     #include <windows.h> // for DLGC_WANTARROWS
@@ -61,6 +64,11 @@
 
 IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow)
 
+/*
+	TODO PROPERTIES
+		style wxHSCROLL | wxVSCROLL
+*/
+
 // ----------------------------------------------------------------------------
 // wxScrollHelperEvtHandler: intercept the events from the window and forward
 // them to wxScrollHelper
@@ -82,8 +90,11 @@ private:
     wxScrollHelper *m_scrollHelper;
 
     bool m_hasDrawnWindow;
+
+    DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler)
 };
 
+#if wxUSE_TIMER
 // ----------------------------------------------------------------------------
 // wxAutoScrollTimer: the timer used to generate a stream of scroll events when
 // a captured mouse is held outside the window
@@ -104,6 +115,8 @@ private:
     wxEventType m_eventType;
     int m_pos,
         m_orient;
+
+    DECLARE_NO_COPY_CLASS(wxAutoScrollTimer)
 };
 
 // ============================================================================
@@ -166,6 +179,7 @@ void wxAutoScrollTimer::Notify()
         }
     }
 }
+#endif
 
 // ----------------------------------------------------------------------------
 // wxScrollHelperEvtHandler
@@ -340,22 +354,37 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX,
     m_xScrollPosition = xPos;
     m_yScrollPosition = yPos;
 
+    int w = noUnitsX * pixelsPerUnitX;
+    int h = noUnitsY * pixelsPerUnitY;
+
     // For better backward compatibility we set persisting limits
     // here not just the size.  It makes SetScrollbars 'sticky'
     // emulating the old non-autoscroll behaviour.
 
-    m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
+    m_targetWindow->SetVirtualSizeHints( w, h );
 
     // The above should arguably be deprecated, this however we still need.
 
-    m_targetWindow->SetVirtualSize( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
+    m_targetWindow->SetVirtualSize( w, h );
 
     if (do_refresh && !noRefresh)
-        m_targetWindow->Refresh(TRUE, GetRect());
-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately() ;
-#endif
+        m_targetWindow->Refresh(TRUE, GetScrollRect());
+
+#ifndef __WXUNIVERSAL__
+    // If the target is not the same as the window with the scrollbars,
+    // then we need to update the scrollbars here, since they won't have
+    // been updated by SetVirtualSize().
+    if ( m_targetWindow != m_win )
+#endif // !__WXUNIVERSAL__
+    {
+        AdjustScrollbars();
+    }
+#ifndef __WXUNIVERSAL__
+    else
+    {
+        // otherwise this has been done by AdjustScrollbars, above
+    }
+#endif // !__WXUNIVERSAL__
 }
 
 // ----------------------------------------------------------------------------
@@ -475,16 +504,12 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event)
 
     if ( needsRefresh )
     {
-        m_targetWindow->Refresh(TRUE, GetRect());
+        m_targetWindow->Refresh(TRUE, GetScrollRect());
     }
     else
     {
-        m_targetWindow->ScrollWindow(dx, dy, GetRect());
+        m_targetWindow->ScrollWindow(dx, dy, GetScrollRect());
     }
-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately() ;
-#endif
 }
 
 int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
@@ -556,27 +581,32 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
                 nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go
         }
         else
-            m_targetWindow->Refresh(TRUE, GetRect());
+            m_targetWindow->Refresh(TRUE, GetScrollRect());
     }
     else
     {
-        if (m_yScrollPixelsPerLine > 0)
+        if ( m_yScrollPixelsPerLine > 0 )
         {
-            int w, h;
-            GetTargetSize(&w, &h);
-
-            int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
-            int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 );
-            if (noPositions < 0)
-                noPositions = 0;
-
-            if ( (m_yScrollPosition + nScrollInc) < 0 )
-                nScrollInc = -m_yScrollPosition; // As -ve as we can go
-            else if ( (m_yScrollPosition + nScrollInc) > noPositions )
-                nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go
+            if ( m_yScrollPosition + nScrollInc < 0 )
+            {
+                // As -ve as we can go
+                nScrollInc = -m_yScrollPosition;
+            }
+            else // check for the other bound
+            {
+                const int posMax = m_yScrollLines - m_yScrollLinesPerPage;
+                if ( m_yScrollPosition + nScrollInc > posMax )
+                {
+                    // As +ve as we can go
+                    nScrollInc = posMax - m_yScrollPosition;
+                }
+            }
         }
         else
-            m_targetWindow->Refresh(TRUE, GetRect());
+        {
+            // VZ: why do we do this? (FIXME)
+            m_targetWindow->Refresh(TRUE, GetScrollRect());
+        }
     }
 
     return nScrollInc;
@@ -585,9 +615,18 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
 // Adjust the scrollbars - new version.
 void wxScrollHelper::AdjustScrollbars()
 {
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
+    static wxRecursionGuardFlag s_flagReentrancy;
+    wxRecursionGuard guard(s_flagReentrancy);
+    if ( guard.IsInside() )
+    {
+        // don't reenter AdjustScrollbars() while another call to
+        // AdjustScrollbars() is in progress because this may lead to calling
+        // ScrollWindow() twice and this can really happen under MSW if
+        // SetScrollbar() call below adds or removes the scrollbar which
+        // changes the window size and hence results in another
+        // AdjustScrollbars() call
+        return;
+    }
 
     int w = 0, h = 0;
     int oldw, oldh;
@@ -595,7 +634,14 @@ void wxScrollHelper::AdjustScrollbars()
     int oldXScroll = m_xScrollPosition;
     int oldYScroll = m_yScrollPosition;
 
-    do {
+    // VZ: at least under Windows this loop is useless because when scrollbars
+    //     [dis]appear we get a WM_SIZE resulting in another call to
+    //     AdjustScrollbars() anyhow. As it doesn't seem to do any harm I leave
+    //     it here for now but it would be better to ensure that all ports
+    //     generate EVT_SIZE when scrollbars [dis]appear, emulating it if
+    //     necessary, and remove it later
+    do
+    {
         GetTargetSize(&w, 0);
 
         if (m_xScrollPixelsPerLine == 0)
@@ -627,40 +673,59 @@ void wxScrollHelper::AdjustScrollbars()
 
         GetTargetSize(0, &h);
 
-        if (m_yScrollPixelsPerLine == 0)
+        // scroll lines per page: if 0, no scrolling is needed
+        int linesPerPage;
+
+        if ( m_yScrollPixelsPerLine == 0 )
         {
+            // scrolling is disabled
             m_yScrollLines = 0;
             m_yScrollPosition = 0;
-            m_win->SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
+            linesPerPage = 0;
         }
-        else
+        else // might need scrolling
         {
-            m_yScrollLines = m_targetWindow->GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine;
+            int hVirt = m_targetWindow->GetVirtualSize().GetHeight();
+            m_yScrollLines = hVirt / m_yScrollPixelsPerLine;
 
             // Calculate page size i.e. number of scroll units you get on the
             // current client window
-            int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
-            if (noPagePositions < 1) noPagePositions = 1;
-            if ( noPagePositions > m_yScrollLines )
-                noPagePositions = m_yScrollLines;
+            linesPerPage = h / m_yScrollPixelsPerLine;
+            if ( linesPerPage >= m_yScrollLines )
+            {
+                // we're big enough to not need scrolling
+                linesPerPage =
+                m_yScrollLines =
+                m_yScrollPosition = 0;
+            }
+            else // we do need a scrollbar
+            {
+                if ( linesPerPage < 1 )
+                    linesPerPage = 1;
+
+                // Correct position if greater than extent of canvas minus
+                // the visible portion of it or if below zero
+                const int posMax = m_yScrollLines - linesPerPage;
+                if ( m_yScrollPosition > posMax )
+                    m_yScrollPosition = posMax;
+                else if ( m_yScrollPosition < 0 )
+                    m_yScrollPosition = 0;
+            }
+        }
 
-            // Correct position if greater than extent of canvas minus
-            // the visible portion of it or if below zero
-            m_yScrollPosition = wxMin( m_yScrollLines - noPagePositions, m_yScrollPosition );
-            m_yScrollPosition = wxMax( 0, m_yScrollPosition );
+        m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition,
+                            linesPerPage, m_yScrollLines);
 
-            m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
-            // The amount by which we scroll when paging
-            SetScrollPageSize(wxVERTICAL, noPagePositions);
-        }
+        // The amount by which we scroll when paging
+        SetScrollPageSize(wxVERTICAL, linesPerPage);
 
-        // If a scrollbar (dis)appeared as a result of this, adjust them again.
 
+        // If a scrollbar (dis)appeared as a result of this, adjust them again.
         oldw = w;
         oldh = h;
 
         GetTargetSize( &w, &h );
-    } while ( w != oldw && h != oldh );
+    } while ( w != oldw || h != oldh );
 
 #ifdef __WXMOTIF__
     // Sorry, some Motif-specific code to implement a backing pixmap
@@ -699,23 +764,19 @@ void wxScrollHelper::AdjustScrollbars()
     {
        if (m_xScrollingEnabled)
             m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0,
-                                          GetRect() );
+                                          GetScrollRect() );
        else
-            m_targetWindow->Refresh(TRUE, GetRect());
+            m_targetWindow->Refresh(TRUE, GetScrollRect());
     }
 
     if (oldYScroll != m_yScrollPosition)
     {
         if (m_yScrollingEnabled)
             m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition),
-                                          GetRect() );
+                                          GetScrollRect() );
         else
-            m_targetWindow->Refresh(TRUE, GetRect());
+            m_targetWindow->Refresh(TRUE, GetScrollRect());
     }
-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
 }
 
 void wxScrollHelper::DoPrepareDC(wxDC& dc)
@@ -779,10 +840,6 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
     if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
         ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
 
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
-
     int w, h;
     GetTargetSize(&w, &h);
 
@@ -804,7 +861,7 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
         if (old_x != m_xScrollPosition) {
             m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
             m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
-                                          GetRect() );
+                                          GetScrollRect() );
         }
     }
     if ((y_pos != -1) && (m_yScrollPixelsPerLine))
@@ -825,14 +882,9 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
         if (old_y != m_yScrollPosition) {
             m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
             m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
-                                          GetRect() );
+                                          GetScrollRect() );
         }
     }
-
-#ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately();
-#endif
-
 }
 
 void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll)
@@ -873,16 +925,19 @@ void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) co
 // Default OnSize resets scrollbars, if any
 void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
 {
-    if( m_win->GetAutoLayout() )
+    if( m_win->GetAutoLayout() || m_targetWindow->GetAutoLayout() )
     {
         if ( m_targetWindow != m_win )
             m_targetWindow->FitInside();
 
         m_win->FitInside();
 
-#if wxUSE_CONSTRAINTS
-        m_win->Layout();
-#endif
+        // FIXME:  Something is really weird here...  This should be
+        // called by FitInside above (and apparently is), yet the
+        // scrollsub sample will get the scrollbar wrong if resized
+        // quickly.  This masks the bug, but is surely not the right
+        // answer at all.
+        AdjustScrollbars();
     }
     else
         AdjustScrollbars();
@@ -938,7 +993,7 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event)
         yScrollOld = m_yScrollPosition;
 
     int dsty;
-    switch ( event.KeyCode() )
+    switch ( event.GetKeyCode() )
     {
         case WXK_PAGEUP:
         case WXK_PRIOR:
@@ -1011,11 +1066,13 @@ bool wxScrollHelper::SendAutoScrollEvents(wxScrollWinEvent& event) const
 
 void wxScrollHelper::StopAutoScrolling()
 {
+#if wxUSE_TIMER
     if ( m_timerAutoScroll )
     {
         delete m_timerAutoScroll;
         m_timerAutoScroll = (wxTimer *)NULL;
     }
+#endif
 }
 
 void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event)
@@ -1077,6 +1134,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event)
         if ( !m_targetWindow->HasScrollbar(orient) )
             return;
 
+#if wxUSE_TIMER
         delete m_timerAutoScroll;
         m_timerAutoScroll = new wxAutoScrollTimer
                                 (
@@ -1087,6 +1145,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event)
                                     orient
                                 );
         m_timerAutoScroll->Start(50); // FIXME: make configurable
+#endif
     }
 }
 
@@ -1184,10 +1243,8 @@ void wxGenericScrolledWindow::DoSetVirtualSize(int x, int y)
     wxPanel::DoSetVirtualSize( x, y );
     AdjustScrollbars();
 
-#if wxUSE_CONSTRAINTS
     if (GetAutoLayout())
         Layout();
-#endif
 }
 
 void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)
@@ -1207,35 +1264,19 @@ wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
 {
     long rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam);
 
+#ifndef __WXWINCE__
     // we need to process arrows ourselves for scrolling
     if ( nMsg == WM_GETDLGCODE )
     {
         rc |= DLGC_WANTARROWS;
     }
+#endif
 
     return rc;
 }
 
 #endif // __WXMSW__
 
-#if WXWIN_COMPATIBILITY
-
-void wxGenericScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const
-{
-      *x_page = GetScrollPageSize(wxHORIZONTAL);
-      *y_page = GetScrollPageSize(wxVERTICAL);
-}
-
-void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const
-{
-    if ( xx )
-        *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine);
-    if ( yy )
-        *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine);
-}
-
-#endif // WXWIN_COMPATIBILITY
-
 #endif // !wxGTK
 
 // vi:sts=4:sw=4:et