Fixed compilation error for Motif.

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

diff --git a/src/gtk/scrolbar.cpp b/src/gtk/scrolbar.cpp
index af054a217cc0f79b21157784e82f4cb4f752411c..8e327cb62e0db8c720838f71051ea77832aac750 100644 (file)
--- a/src/gtk/scrolbar.cpp
+++ b/src/gtk/scrolbar.cpp
@@ -35,7 +35,7 @@ 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 +45,7 @@ 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 )
@@ -66,6 +67,15 @@ 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->GetEventHandler()->ProcessEvent( event );
+    }
+
+    // throw other event (wxEVT_SCROLL_THUMBTRACK)
     wxScrollEvent event( command, win->GetId(), value, orient );
     event.SetEventObject( win );
     win->GetEventHandler()->ProcessEvent( event );
@@ -76,31 +86,57 @@ 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
+    // 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;
+      }
 
-    // FIXME: there is no slider field any more, what was meant here?
 #ifndef __WXGTK20__
+    // 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 +145,6 @@ 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;
@@ -122,10 +156,14 @@ gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
         win->GetEventHandler()->ProcessEvent( 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
@@ -141,14 +179,14 @@ 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;
@@ -164,12 +202,10 @@ 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 +215,7 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
 
     PostCreation(size);
 
-    return TRUE;
+    return true;
 }
 
 int wxScrollBar::GetThumbPosition() const