fix MSVC warnings about possibly uninitialized variables; some reindentation

[wxWidgets.git] / src / gtk1 / scrolbar.cpp

diff --git a/src/gtk1/scrolbar.cpp b/src/gtk1/scrolbar.cpp
index af054a217cc0f79b21157784e82f4cb4f752411c..82ad187aa693439d8a565dad63287d883eca91b7 100644 (file)
--- a/src/gtk1/scrolbar.cpp
+++ b/src/gtk1/scrolbar.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        src/gtk/scrolbar.cpp
+// Name:        src/gtk1/scrolbar.cpp
 // Purpose:
 // Author:      Robert Roebling
 // Id:          $Id$
@@ -7,11 +7,6 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "scrolbar.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -19,9 +14,12 @@
 
 #include "wx/scrolbar.h"
 
-#include "wx/utils.h"
-#include "wx/math.h"
-#include "wx/gtk/private.h"
+#ifndef WX_PRECOMP
+    #include "wx/utils.h"
+    #include "wx/math.h"
+#endif
+
+#include "wx/gtk1/private.h"
 
 //-----------------------------------------------------------------------------
 // idle system
@@ -35,7 +33,7 @@ extern bool g_isIdle;
 //-----------------------------------------------------------------------------
 
 extern bool   g_blockEventsOnDrag;
-extern bool   g_blockEventsOnScroll;
+static wxEventType g_currentUpDownEvent = wxEVT_NULL;
 
 static const float sensitivity = 0.02;
 
@@ -45,6 +43,7 @@ static const float sensitivity = 0.02;
 
 // FIXME: is GtkScrollType really passed to us as 2nd argument?
 
+extern "C" {
 static void gtk_scrollbar_callback( GtkAdjustment *adjust,
                                     SCROLLBAR_CBACK_ARG
                                     wxScrollBar *win )
@@ -66,9 +65,18 @@ static void gtk_scrollbar_callback( GtkAdjustment *adjust,
 
     int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
 
+    // throw a LINEUP / LINEDOWN event if necessary
+    if (g_currentUpDownEvent != wxEVT_NULL)
+    {
+        wxScrollEvent event( g_currentUpDownEvent, win->GetId(), value, orient );
+        event.SetEventObject( win );
+        win->HandleWindowEvent( event );
+    }
+
+    // throw other event (wxEVT_SCROLL_THUMBTRACK)
     wxScrollEvent event( command, win->GetId(), value, orient );
     event.SetEventObject( win );
-    win->GetEventHandler()->ProcessEvent( event );
+    win->HandleWindowEvent( event );
 
 /*
     wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
@@ -76,31 +84,55 @@ static void gtk_scrollbar_callback( GtkAdjustment *adjust,
     win->ProcessEvent( cevent );
 */
 }
+}
 
 //-----------------------------------------------------------------------------
 // "button_press_event" from slider
 //-----------------------------------------------------------------------------
-
+extern "C" {
 static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
                                                  GdkEventButton *gdk_event,
                                                  wxScrollBar *win )
 {
     if (g_isIdle) wxapp_install_idle_handler();
 
-//  g_blockEventsOnScroll = TRUE;  doesn't work in DialogEd
-
-    // FIXME: there is no slider field any more, what was meant here?
-#ifndef __WXGTK20__
+    // check if a LINEUP/LINEDOWN event must be thrown
+    // I suppose here the size of scrollbar top/bottom buttons is 16px height
+    if (gdk_event->type == GDK_BUTTON_PRESS && gdk_event->button == 1)
+    {
+        int scroll_height, mouse_pos;
+
+        // get the mouse position when the click is done
+        if (win->HasFlag(wxSB_VERTICAL))
+        {
+            scroll_height = GTK_WIDGET(widget)->allocation.height - 16;
+            mouse_pos = (int)gdk_event->y;
+        }
+        else
+        {
+            scroll_height = GTK_WIDGET(widget)->allocation.width - 16;
+            mouse_pos = (int)gdk_event->x;
+        }
+
+        // compare mouse position to scrollbar height
+        if  (mouse_pos > scroll_height)
+            g_currentUpDownEvent = wxEVT_SCROLL_LINEDOWN;
+        else if (mouse_pos < 16)
+            g_currentUpDownEvent = wxEVT_SCROLL_LINEUP;
+      }
+
+    // There is no slider field any more
     win->m_isScrolling = (gdk_event->window == widget->slider);
-#endif
 
     return FALSE;
 }
+}
 
 //-----------------------------------------------------------------------------
 // "button_release_event" from slider
 //-----------------------------------------------------------------------------
 
+extern "C" {
 static gint
 gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
                                        GdkEventButton *WXUNUSED(gdk_event),
@@ -109,8 +141,6 @@ gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
     if (g_isIdle)
         wxapp_install_idle_handler();
 
-//  g_blockEventsOnScroll = FALSE;
-
     if (win->m_isScrolling)
     {
         wxEventType command = wxEVT_SCROLL_THUMBRELEASE;
@@ -119,13 +149,17 @@ gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
 
         wxScrollEvent event( command, win->GetId(), value, orient );
         event.SetEventObject( win );
-        win->GetEventHandler()->ProcessEvent( event );
+        win->HandleWindowEvent( event );
     }
 
-    win->m_isScrolling = FALSE;
+    win->m_isScrolling = false;
+
+    // reset the LINEUP/LINEDOWN flag when the mouse button is released
+    g_currentUpDownEvent = wxEVT_NULL;
 
     return FALSE;
 }
+}
 
 //-----------------------------------------------------------------------------
 // wxScrollBar
@@ -141,22 +175,22 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
            const wxPoint& pos, const wxSize& size,
            long style, const wxValidator& validator, const wxString& name )
 {
-    m_needParent = TRUE;
-    m_acceptsFocus = TRUE;
+    m_needParent = true;
+    m_acceptsFocus = true;
 
     if (!PreCreation( parent, pos, size ) ||
         !CreateBase( parent, id, pos, size, style, validator, name ))
     {
         wxFAIL_MSG( wxT("wxScrollBar creation failed") );
-        return FALSE;
+        return false;
     }
 
     m_oldPos = 0.0;
 
     if ((style & wxSB_VERTICAL) == wxSB_VERTICAL)
-        m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL );
+        m_widget = gtk_vscrollbar_new( NULL );
     else
-        m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL );
+        m_widget = gtk_hscrollbar_new( NULL );
 
     m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
 
@@ -164,12 +198,10 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
                         "value_changed",
                         (GtkSignalFunc) gtk_scrollbar_callback,
                         (gpointer) this );
-
     gtk_signal_connect( GTK_OBJECT(m_widget),
                         "button_press_event",
                         (GtkSignalFunc)gtk_scrollbar_button_press_callback,
                         (gpointer) this );
-
     gtk_signal_connect( GTK_OBJECT(m_widget),
                         "button_release_event",
                         (GtkSignalFunc)gtk_scrollbar_button_release_callback,
@@ -179,7 +211,7 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
 
     PostCreation(size);
 
-    return TRUE;
+    return true;
 }
 
 int wxScrollBar::GetThumbPosition() const
@@ -314,12 +346,10 @@ bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
 {
     GtkRange *range = GTK_RANGE(m_widget);
     return ( (window == GTK_WIDGET(range)->window)
-#ifndef __WXGTK20__
                 || (window == range->trough)
                 || (window == range->slider)
                 || (window == range->step_forw)
                 || (window == range->step_back)
-#endif // GTK+ 1.x
            );
 }
 
@@ -335,4 +365,4 @@ wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
     return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new);
 }
 
-#endif
+#endif // wxUSE_SCROLLBAR