/////////////////////////////////////////////////////////////////////////////
-// Name: scrolbar.cpp
+// Name: src/gtk1/scrolbar.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// 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 <math.h>
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#ifndef WX_PRECOMP
+ #include "wx/utils.h"
+ #include "wx/math.h"
+#endif
+
+#include "wx/gtk1/private.h"
+
+//-----------------------------------------------------------------------------
+// idle system
+//-----------------------------------------------------------------------------
+
+extern void wxapp_install_idle_handler();
+extern bool g_isIdle;
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
extern bool g_blockEventsOnDrag;
-extern bool g_blockEventsOnScroll;
+static wxEventType g_currentUpDownEvent = wxEVT_NULL;
+
+static const float sensitivity = 0.02;
//-----------------------------------------------------------------------------
// "value_changed"
//-----------------------------------------------------------------------------
-static void gtk_scrollbar_callback( GtkWidget *WXUNUSED(widget), wxScrollBar *win )
-{
- if (!win->HasVMT()) return;
+// 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 = 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 (win->m_isScrolling)
- {
- command = wxEVT_SCROLL_THUMBTRACK;
- }
- else
+
+ 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)
{
- if (fabs(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM;
- else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP;
- else 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;
+ wxScrollEvent event( g_currentUpDownEvent, win->GetId(), value, orient );
+ event.SetEventObject( win );
+ win->HandleWindowEvent( event );
}
- int value = (int)(win->m_adjust->value+0.5);
-
- int orient = wxHORIZONTAL;
- if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
-
+ // 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() );
cevent.SetEventObject( win );
win->ProcessEvent( cevent );
*/
}
+}
//-----------------------------------------------------------------------------
// "button_press_event" from slider
//-----------------------------------------------------------------------------
-
-static gint gtk_scrollbar_button_press_callback( GtkRange *WXUNUSED(widget),
- GdkEventButton *WXUNUSED(gdk_event),
- wxScrollBar *win )
+extern "C" {
+static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
+ GdkEventButton *gdk_event,
+ wxScrollBar *win )
{
- win->m_isScrolling = TRUE;
-// g_blockEventsOnScroll = TRUE; doesn't work in DialogEd
-
- return FALSE;
+ if (g_isIdle) wxapp_install_idle_handler();
+
+ // 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);
+
+ return FALSE;
+}
}
//-----------------------------------------------------------------------------
// "button_release_event" from slider
//-----------------------------------------------------------------------------
-static gint gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
- GdkEventButton *WXUNUSED(gdk_event),
- wxScrollBar *win )
+extern "C" {
+static gint
+gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
+ GdkEventButton *WXUNUSED(gdk_event),
+ wxScrollBar *win )
{
- win->m_isScrolling = FALSE;
-// g_blockEventsOnScroll = FALSE;
-
- gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" );
-
+ 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->HandleWindowEvent( event );
+ }
+
+ win->m_isScrolling = false;
+
+ // reset the LINEUP/LINEDOWN flag when the mouse button is released
+ g_currentUpDownEvent = wxEVT_NULL;
+
return FALSE;
}
+}
//-----------------------------------------------------------------------------
// wxScrollBar
IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
-wxScrollBar::~wxScrollBar(void)
+wxScrollBar::~wxScrollBar()
{
}
const wxPoint& pos, const wxSize& size,
long style, const wxValidator& validator, const wxString& name )
{
- m_needParent = TRUE;
- m_acceptsFocus = TRUE;
-
- PreCreation( parent, id, pos, size, style, name );
-
- SetValidator( validator );
+ 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_hscrollbar_new( (GtkAdjustment *) NULL );
- else
+ 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) );
-
- gtk_signal_connect( GTK_OBJECT(m_adjust),
+
+ gtk_signal_connect( GTK_OBJECT(m_adjust),
"value_changed",
- (GtkSignalFunc) gtk_scrollbar_callback,
- (gpointer) this );
-
- gtk_signal_connect( GTK_OBJECT(m_widget),
+ (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),
+ (GtkSignalFunc)gtk_scrollbar_button_press_callback,
+ (gpointer) this );
+ gtk_signal_connect( GTK_OBJECT(m_widget),
"button_release_event",
- (GtkSignalFunc)gtk_scrollbar_button_release_callback,
- (gpointer) this );
+ (GtkSignalFunc)gtk_scrollbar_button_release_callback,
+ (gpointer) this );
- m_parent->AddChild( this );
+ m_parent->DoAddChild( this );
- (m_parent->m_insertCallback)( m_parent, this );
-
- PostCreation();
-
- SetBackgroundColour( parent->GetBackgroundColour() );
+ PostCreation(size);
- Show( TRUE );
-
- return TRUE;
+ 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
void wxScrollBar::SetThumbPosition( int viewStart )
{
if (m_isScrolling) return;
-
+
float fpos = (float)viewStart;
m_oldPos = fpos;
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,
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;
}
/* Backward compatibility */
-int wxScrollBar::GetValue(void) const
+int wxScrollBar::GetValue() const
{
return GetThumbPosition();
}
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;
bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
{
GtkRange *range = GTK_RANGE(m_widget);
- return ( (window == GTK_WIDGET(range)->window) ||
- (window == range->trough) ||
- (window == range->slider) ||
- (window == range->step_forw) ||
- (window == range->step_back) );
+ return ( (window == GTK_WIDGET(range)->window)
+ || (window == range->trough)
+ || (window == range->slider)
+ || (window == range->step_forw)
+ || (window == range->step_back)
+ );
+}
+
+wxSize wxScrollBar::DoGetBestSize() const
+{
+ return wxControl::DoGetBestSize();
}
-void wxScrollBar::ApplyWidgetStyle()
+// static
+wxVisualAttributes
+wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
- SetWidgetStyle();
- gtk_widget_set_style( m_widget, m_widgetStyle );
+ return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new);
}
+#endif // wxUSE_SCROLLBAR
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