Fixed toolbar crash for MinGW/Cygwin

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

diff --git a/src/gtk/scrolbar.cpp b/src/gtk/scrolbar.cpp
index 4d21168158e29f2f77e32cae189071cc2ccf3c03..df1cba34af5e367a15cfcc0e25fe187dc8683dfa 100644 (file)
--- a/src/gtk/scrolbar.cpp
+++ b/src/gtk/scrolbar.cpp
@@ -1,10 +1,10 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        scrolbar.cpp
+// Name:        src/gtk/scrolbar.cpp
 // Purpose:
 // Author:      Robert Roebling
 // Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
-// Licence:           wxWindows licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 
@@ -12,15 +12,18 @@
 #pragma implementation "scrolbar.h"
 #endif
 
-#include "wx/scrolbar.h"
+#include "wx/defs.h"
 
 #if wxUSE_SCROLLBAR
 
+#include "wx/scrolbar.h"
+
 #include "wx/utils.h"
+
 #include <math.h>
 
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
 
 //-----------------------------------------------------------------------------
 // idle system
@@ -36,6 +39,8 @@ extern bool g_isIdle;
 extern bool   g_blockEventsOnDrag;
 extern bool   g_blockEventsOnScroll;
 
+static const float sensitivity = 0.02;
+
 //-----------------------------------------------------------------------------
 // "value_changed"
 //-----------------------------------------------------------------------------
@@ -48,7 +53,7 @@ static void gtk_scrollbar_callback( GtkAdjustment *adjust, wxScrollBar *win )
     if (g_blockEventsOnDrag) return;
     
     float diff = adjust->value - win->m_oldPos;
-    if (fabs(diff) < 0.2) return;
+    if (fabs(diff) < sensitivity) return;
     
     win->m_oldPos = adjust->value;
 
@@ -60,7 +65,8 @@ static void gtk_scrollbar_callback( GtkAdjustment *adjust, wxScrollBar *win )
     else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLL_PAGEUP;
     else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD)  command = wxEVT_SCROLL_PAGEDOWN;
     
-    int value = (int)ceil(adjust->value);
+    double dvalue = adjust->value;
+    int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
       
     int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
   
@@ -79,14 +85,15 @@ static void gtk_scrollbar_callback( GtkAdjustment *adjust, wxScrollBar *win )
 // "button_press_event" from slider
 //-----------------------------------------------------------------------------
 
-static gint gtk_scrollbar_button_press_callback( GtkRange *WXUNUSED(widget), 
-                                                 GdkEventButton *WXUNUSED(gdk_event), 
+static gint gtk_scrollbar_button_press_callback( GtkRange *widget, 
+                                                 GdkEventButton *gdk_event, 
                                                  wxScrollBar *win )
 {
     if (g_isIdle) wxapp_install_idle_handler();
 
-    win->SetScrolling(TRUE);
 //  g_blockEventsOnScroll = TRUE;  doesn't work in DialogEd
+
+    win->m_isScrolling = (gdk_event->window == widget->slider);
   
     return FALSE;
 }
@@ -100,12 +107,22 @@ static gint gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
                                                    wxScrollBar *win )
 {
     if (g_isIdle) wxapp_install_idle_handler();
-
-    win->SetScrolling(FALSE);
+    
 //  g_blockEventsOnScroll = FALSE;
   
-    gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
+    if (win->m_isScrolling)
+    {
+        wxEventType command = wxEVT_SCROLL_THUMBRELEASE;
+        int value = (int)ceil(win->m_adjust->value);
+        int dir = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
+
+        wxScrollEvent event( command, value, dir );
+        event.SetEventObject( win );
+        win->GetEventHandler()->ProcessEvent( event );
+    }
       
+    win->m_isScrolling = FALSE;
+    
     return FALSE;
 }
 
@@ -115,7 +132,7 @@ static gint gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
 
 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
 
-wxScrollBar::~wxScrollBar(void)
+wxScrollBar::~wxScrollBar()
 {
 }
 
@@ -129,8 +146,8 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
     if (!PreCreation( parent, pos, size ) ||
         !CreateBase( parent, id, pos, size, style, validator, name ))
     {
-        wxFAIL_MSG( T("wxScrollBar creation failed") );
-       return FALSE;
+        wxFAIL_MSG( wxT("wxScrollBar creation failed") );
+        return FALSE;
     }
 
     m_oldPos = 0.0;
@@ -168,9 +185,10 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
     return TRUE;
 }
 
-int wxScrollBar::GetThumbPosition(void) const
+int wxScrollBar::GetThumbPosition() const
 {
-    return (int)(m_adjust->value+0.5);
+    double val = m_adjust->value;
+    return (int)(val < 0 ? val - 0.5 : val + 0.5);
 }
 
 int wxScrollBar::GetThumbSize() const
@@ -197,7 +215,16 @@ void wxScrollBar::SetThumbPosition( int viewStart )
     if (fabs(fpos-m_adjust->value) < 0.2) return;
     m_adjust->value = fpos;
   
+    gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust), 
+                        (GtkSignalFunc) gtk_scrollbar_callback, 
+                        (gpointer) this );
+                        
     gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
+    
+    gtk_signal_connect( GTK_OBJECT(m_adjust), 
+                        "value_changed",
+                        (GtkSignalFunc) gtk_scrollbar_callback, 
+                        (gpointer) this );
 }
 
 void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize,
@@ -229,7 +256,7 @@ void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int page
 }
 
 /* Backward compatibility */
-int wxScrollBar::GetValue(void) const
+int wxScrollBar::GetValue() const
 {
     return GetThumbPosition();
 }