/////////////////////////////////////////////////////////////////////////////
-// Name: scrolbar.cpp
+// Name: src/gtk/scrolbar.cpp
// Purpose:
// Author: Robert Roebling
-// Created: 01/02/97
-// Id:
-// Copyright: (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
-// Licence: wxWindows licence
+// Id: $Id$
+// Copyright: (c) 1998 Robert Roebling
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
-#ifdef __GNUG__
-#pragma implementation "scrolbar.h"
-#endif
+#if wxUSE_SCROLLBAR
#include "wx/scrolbar.h"
+
#include "wx/utils.h"
+#include "wx/math.h"
+#include "wx/gtk/private.h"
+
+//-----------------------------------------------------------------------------
+// idle system
+//-----------------------------------------------------------------------------
+
+extern void wxapp_install_idle_handler();
+extern bool g_isIdle;
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
extern bool g_blockEventsOnDrag;
+static wxEventType g_currentUpDownEvent = wxEVT_NULL;
+
+static const float sensitivity = 0.02;
//-----------------------------------------------------------------------------
-// wxScrollBar
+// "value_changed"
//-----------------------------------------------------------------------------
-static void gtk_scrollbar_callback( GtkWidget *WXUNUSED(widget), wxScrollBar *win )
-{
- if (!win->HasVMT()) return;
- if (g_blockEventsOnDrag) return;
-
- float diff = win->m_adjust->value - win->m_oldPos;
- if (fabs(diff) < 0.2) return;
-
- wxEventType command = wxEVT_NULL;
-
- float line_step = win->m_adjust->step_increment;
- float page_step = win->m_adjust->page_increment;
-
- if (fabs(diff-line_step) < 0.2) command = wxEVT_SCROLL_LINEDOWN;
- else if (fabs(diff+line_step) < 0.2) command = wxEVT_SCROLL_LINEUP;
- else if (fabs(diff-page_step) < 0.2) command = wxEVT_SCROLL_PAGEDOWN;
- else if (fabs(diff+page_step) < 0.2) command = wxEVT_SCROLL_PAGEUP;
- else command = wxEVT_SCROLL_THUMBTRACK;
-
- int value = (int)(win->m_adjust->value+0.5);
-
- int orient = wxHORIZONTAL;
- if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxHORIZONTAL;
-
- wxScrollEvent event( command, win->GetId(), value, orient );
- event.SetEventObject( win );
- win->GetEventHandler()->ProcessEvent( event );
-
+// FIXME: is GtkScrollType really passed to us as 2nd argument?
+
+extern "C" {
+static void gtk_scrollbar_callback( GtkAdjustment *adjust,
+ SCROLLBAR_CBACK_ARG
+ wxScrollBar *win )
+{
+ if (g_isIdle) wxapp_install_idle_handler();
+
+ if (!win->m_hasVMT) return;
+ if (g_blockEventsOnDrag) return;
+
+ float diff = adjust->value - win->m_oldPos;
+ if (fabs(diff) < sensitivity) return;
+
+ win->m_oldPos = adjust->value;
+
+ wxEventType command = GtkScrollTypeToWx(GET_SCROLL_TYPE(win->m_widget));
+
+ double dvalue = adjust->value;
+ int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
+
+ 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 );
+
/*
- wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
- cevent.SetEventObject( win );
- win->ProcessEvent( cevent );
+ wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
+ cevent.SetEventObject( win );
+ win->ProcessEvent( cevent );
*/
-};
+}
+}
-IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
+//-----------------------------------------------------------------------------
+// "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();
-wxScrollBar::wxScrollBar(wxWindow *parent, wxWindowID id,
- const wxPoint& pos, const wxSize& size,
- long style, const wxString& name )
+ // 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;
+ }
+
+ return FALSE;
+}
+}
+
+//-----------------------------------------------------------------------------
+// "button_release_event" from slider
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static gint
+gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
+ GdkEventButton *WXUNUSED(gdk_event),
+ wxScrollBar *win )
{
- Create( parent, id, pos, size, style, name );
-};
+ if (g_isIdle)
+ wxapp_install_idle_handler();
+
+ if (win->m_isScrolling)
+ {
+ wxEventType command = wxEVT_SCROLL_THUMBRELEASE;
+ int value = (int)ceil(win->m_adjust->value);
+ int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
+
+ wxScrollEvent event( command, win->GetId(), value, orient );
+ event.SetEventObject( win );
+ win->GetEventHandler()->ProcessEvent( event );
+ }
+
+ win->m_isScrolling = false;
+
+ // reset the LINEUP/LINEDOWN flag when the mouse button is released
+ g_currentUpDownEvent = wxEVT_NULL;
+
+ return FALSE;
+}
+}
-wxScrollBar::~wxScrollBar(void)
+//-----------------------------------------------------------------------------
+// wxScrollBar
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
+
+wxScrollBar::~wxScrollBar()
{
-};
+}
bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
const wxPoint& pos, const wxSize& size,
- long style, const wxString& name )
-{
- m_needParent = TRUE;
-
- PreCreation( parent, id, pos, size, style, name );
-
- m_oldPos = 0.0;
-
- if (style & wxSB_VERTICAL == wxSB_VERTICAL)
- m_widget = gtk_hscrollbar_new( NULL );
- else
- m_widget = gtk_vscrollbar_new( NULL );
-
- m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
-
- gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
- (GtkSignalFunc) gtk_scrollbar_callback, (gpointer) this );
-
- PostCreation();
-
- Show( TRUE );
-
- return TRUE;
-};
-
-int wxScrollBar::GetPosition(void) const
-{
- return (int)(m_adjust->value+0.5);
-};
+ long style, const wxValidator& validator, const wxString& name )
+{
+ 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;
+ }
+
+ m_oldPos = 0.0;
+
+ if ((style & wxSB_VERTICAL) == wxSB_VERTICAL)
+ m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL );
+ else
+ m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL );
+
+ m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
+
+ g_signal_connect (m_adjust, "value_changed",
+ G_CALLBACK (gtk_scrollbar_callback), this);
+ g_signal_connect (m_widget, "button_press_event",
+ G_CALLBACK (gtk_scrollbar_button_press_callback),
+ this);
+ g_signal_connect (m_widget, "button_release_event",
+ G_CALLBACK (gtk_scrollbar_button_release_callback),
+ this);
+
+ m_parent->DoAddChild( this );
+
+ PostCreation(size);
+
+ return true;
+}
+
+int wxScrollBar::GetThumbPosition() const
+{
+ double val = m_adjust->value;
+ return (int)(val < 0 ? val - 0.5 : val + 0.5);
+}
int wxScrollBar::GetThumbSize() const
{
- return (int)(m_adjust->page_size+0.5);
-};
+ return (int)(m_adjust->page_size+0.5);
+}
int wxScrollBar::GetPageSize() const
{
- return (int)(m_adjust->page_increment+0.5);
-};
+ return (int)(m_adjust->page_increment+0.5);
+}
int wxScrollBar::GetRange() const
{
- return (int)(m_adjust->upper+0.5);
-};
+ return (int)(m_adjust->upper+0.5);
+}
-void wxScrollBar::SetPosition( int viewStart )
+void wxScrollBar::SetThumbPosition( int viewStart )
{
- float fpos = (float)viewStart;
- m_oldPos = fpos;
- if (fabs(fpos-m_adjust->value) < 0.2) return;
- m_adjust->value = fpos;
-
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
-};
+ if (m_isScrolling) return;
+
+ float fpos = (float)viewStart;
+ m_oldPos = fpos;
+ if (fabs(fpos-m_adjust->value) < 0.2) return;
+ m_adjust->value = fpos;
+
+ g_signal_handlers_disconnect_by_func (m_adjust,
+ (gpointer) gtk_scrollbar_callback,
+ this);
+
+ g_signal_emit_by_name (m_adjust, "value_changed");
+
+ g_signal_connect (m_adjust, "value_changed",
+ G_CALLBACK (gtk_scrollbar_callback), this);
+}
void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize,
bool WXUNUSED(refresh) )
{
- float fpos = (float)position;
- m_oldPos = fpos;
- float frange = (float)range;
- float fthumb = (float)thumbSize;
- float fpage = (float)pageSize;
-
- if ((fabs(fpos-m_adjust->value) < 0.2) &&
- (fabs(frange-m_adjust->upper) < 0.2) &&
- (fabs(fthumb-m_adjust->page_size) < 0.2) &&
- (fabs(fpage-m_adjust->page_increment) < 0.2))
- return;
-
- m_adjust->lower = 0.0;
- m_adjust->upper = frange;
- m_adjust->value = fpos;
- m_adjust->step_increment = 1.0;
- m_adjust->page_increment = (float)(wxMax(fpage-2,0));
- m_adjust->page_size = fthumb;
-
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
-};
-
-// Backward compatibility
-int wxScrollBar::GetValue(void) const
-{
- return GetPosition();
-};
+ float fpos = (float)position;
+ float frange = (float)range;
+ float fthumb = (float)thumbSize;
+ float fpage = (float)pageSize;
+
+ if ((fabs(frange-m_adjust->upper) < 0.2) &&
+ (fabs(fthumb-m_adjust->page_size) < 0.2) &&
+ (fabs(fpage-m_adjust->page_increment) < 0.2))
+ {
+ SetThumbPosition( position );
+ return;
+ }
+
+ m_oldPos = fpos;
+
+ m_adjust->lower = 0.0;
+ m_adjust->upper = frange;
+ m_adjust->value = fpos;
+ m_adjust->step_increment = 1.0;
+ m_adjust->page_increment = (float)(wxMax(fpage,0));
+ m_adjust->page_size = fthumb;
+
+ g_signal_emit_by_name (m_adjust, "changed");
+}
+
+/* Backward compatibility */
+int wxScrollBar::GetValue() const
+{
+ return GetThumbPosition();
+}
void wxScrollBar::SetValue( int viewStart )
{
- SetPosition( viewStart );
-};
+ SetThumbPosition( viewStart );
+}
void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const
{
- int pos = (int)(m_adjust->value+0.5);
- int thumb = (int)(m_adjust->page_size+0.5);
- int page = (int)(m_adjust->page_increment+0.5);
- int range = (int)(m_adjust->upper+0.5);
-
- *viewStart = pos;
- *viewLength = range;
- *objectLength = thumb;
- *pageLength = page;
-};
+ int pos = (int)(m_adjust->value+0.5);
+ int thumb = (int)(m_adjust->page_size+0.5);
+ int page = (int)(m_adjust->page_increment+0.5);
+ int range = (int)(m_adjust->upper+0.5);
+
+ *viewStart = pos;
+ *viewLength = range;
+ *objectLength = thumb;
+ *pageLength = page;
+}
int wxScrollBar::GetViewLength() const
{
- return (int)(m_adjust->upper+0.5);
-};
+ return (int)(m_adjust->upper+0.5);
+}
int wxScrollBar::GetObjectLength() const
{
- return (int)(m_adjust->page_size+0.5);
-};
+ return (int)(m_adjust->page_size+0.5);
+}
void wxScrollBar::SetPageSize( int pageLength )
{
- int pos = (int)(m_adjust->value+0.5);
- int thumb = (int)(m_adjust->page_size+0.5);
- int range = (int)(m_adjust->upper+0.5);
- SetScrollbar( pos, thumb, range, pageLength );
-};
+ int pos = (int)(m_adjust->value+0.5);
+ int thumb = (int)(m_adjust->page_size+0.5);
+ int range = (int)(m_adjust->upper+0.5);
+ SetScrollbar( pos, thumb, range, pageLength );
+}
void wxScrollBar::SetObjectLength( int objectLength )
{
- int pos = (int)(m_adjust->value+0.5);
- int page = (int)(m_adjust->page_increment+0.5);
- int range = (int)(m_adjust->upper+0.5);
- SetScrollbar( pos, objectLength, range, page );
-};
+ int pos = (int)(m_adjust->value+0.5);
+ int page = (int)(m_adjust->page_increment+0.5);
+ int range = (int)(m_adjust->upper+0.5);
+ SetScrollbar( pos, objectLength, range, page );
+}
void wxScrollBar::SetViewLength( int viewLength )
{
- int pos = (int)(m_adjust->value+0.5);
- int thumb = (int)(m_adjust->page_size+0.5);
- int page = (int)(m_adjust->page_increment+0.5);
- SetScrollbar( pos, thumb, viewLength, page );
-};
+ int pos = (int)(m_adjust->value+0.5);
+ int thumb = (int)(m_adjust->page_size+0.5);
+ int page = (int)(m_adjust->page_increment+0.5);
+ SetScrollbar( pos, thumb, viewLength, page );
+}
+
+bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
+{
+ GtkRange *range = GTK_RANGE(m_widget);
+ return ( (window == GTK_WIDGET(range)->window) );
+}
+
+wxSize wxScrollBar::DoGetBestSize() const
+{
+ return wxControl::DoGetBestSize();
+}
+
+// static
+wxVisualAttributes
+wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
+{
+ return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new);
+}
+#endif
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