simplify code to return from the end of the function

[wxWidgets.git] / src / gtk / scrolwin.cpp

diff --git a/src/gtk/scrolwin.cpp b/src/gtk/scrolwin.cpp
index ef9dfd797c2890660a767e87bd88d29d893477ba..2ce5843e923bf46d3e762bf595ff1f128e55f196 100644 (file)
--- a/src/gtk/scrolwin.cpp
+++ b/src/gtk/scrolwin.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        gtk/scrolwin.cpp
+// Name:        src/gtk/scrolwin.cpp
 // Purpose:     wxScrolledWindow implementation
 // Author:      Robert Roebling
 // Modified by: Ron Lee
@@ -10,14 +10,6 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-// ============================================================================
-// declarations
-// ============================================================================
-
-// ----------------------------------------------------------------------------
-// headers
-// ----------------------------------------------------------------------------
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -26,11 +18,9 @@
 #endif
 
 #include "wx/scrolwin.h"
-#include "wx/gtk/private.h"
 
-// ============================================================================
-// implementation
-// ============================================================================
+#include <gtk/gtk.h>
+#include "wx/gtk/private/gtk2-compat.h"
 
 // ----------------------------------------------------------------------------
 // wxScrollHelper implementation
@@ -41,44 +31,12 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
                                    int xPos, int yPos,
                                    bool noRefresh)
 {
-    int xs, ys;
-    GetViewStart(& xs, & ys);
-
-    int old_x = m_xScrollPixelsPerLine * xs;
-    int old_y = m_yScrollPixelsPerLine * ys;
+    // prevent programmatic position changes from causing scroll events
+    m_win->SetScrollPos(wxHORIZONTAL, xPos);
+    m_win->SetScrollPos(wxVERTICAL, yPos);
 
-    m_xScrollPixelsPerLine = pixelsPerUnitX;
-    m_yScrollPixelsPerLine = pixelsPerUnitY;
-
-    m_win->m_scrollBar[wxWindow::ScrollDir_Horz]->adjustment->value =
-    m_xScrollPosition = xPos;
-    m_win->m_scrollBar[wxWindow::ScrollDir_Vert]->adjustment->value =
-    m_yScrollPosition = yPos;
-
-    // Setting hints here should arguably be deprecated, but without it
-    // a sizer might override this manual scrollbar setting in old code.
-    // m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
-
-    int w = noUnitsX * pixelsPerUnitX;
-    int h = noUnitsY * pixelsPerUnitY;
-    m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord,
-                                    h ? h : wxDefaultCoord);
-
-    // 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)
-    {
-        AdjustScrollbars();
-    }
-
-    if (!noRefresh)
-    {
-        int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
-        int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
-
-        m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
-    }
+    base_type::SetScrollbars(
+        pixelsPerUnitX, pixelsPerUnitY, noUnitsX, noUnitsY, xPos, yPos, noRefresh);
 }
 
 void wxScrollHelper::DoAdjustScrollbar(GtkRange* range,
@@ -89,6 +47,9 @@ void wxScrollHelper::DoAdjustScrollbar(GtkRange* range,
                                        int *lines,
                                        int *linesPerPage)
 {
+    if (!range)
+        return;
+
     int upper;
     int page_size;
     if (pixelsPerLine > 0 && winSize > 0 && winSize < virtSize)
@@ -108,10 +69,8 @@ void wxScrollHelper::DoAdjustScrollbar(GtkRange* range,
         *linesPerPage = 0;
     }
 
-    GtkAdjustment* adj = range->adjustment;
-    adj->step_increment = 1;
-    adj->page_increment =
-    adj->page_size = page_size;
+    gtk_range_set_increments(range, 1, page_size);
+    gtk_adjustment_set_page_size(gtk_range_get_adjustment(range), page_size);
     gtk_range_set_range(range, 0, upper);
 
     // ensure that the scroll position is always in valid range
@@ -183,7 +142,7 @@ void wxScrollHelper::DoScrollOneDir(int orient,
 
 void wxScrollHelper::DoScroll( int x_pos, int y_pos )
 {
-    wxCHECK_RET( m_targetWindow != 0, _T("No target window") );
+    wxCHECK_RET( m_targetWindow != 0, wxT("No target window") );
 
     DoScrollOneDir(wxHORIZONTAL, x_pos, m_xScrollPixelsPerLine, &m_xScrollPosition);
     DoScrollOneDir(wxVERTICAL, y_pos, m_yScrollPixelsPerLine, &m_yScrollPosition);
@@ -209,6 +168,10 @@ GtkPolicyType GtkPolicyFromWX(wxScrollbarVisibility visibility)
             policy = GTK_POLICY_AUTOMATIC;
             break;
 
+        default:
+            wxFAIL_MSG( wxS("unknown scrollbar visibility") );
+            // fall through
+
         case wxSHOW_SB_ALWAYS:
             policy = GTK_POLICY_ALWAYS;
             break;
@@ -229,4 +192,3 @@ void wxScrollHelper::DoShowScrollbars(wxScrollbarVisibility horz,
                                    GtkPolicyFromWX(horz),
                                    GtkPolicyFromWX(vert));
 }
-