/////////////////////////////////////////////////////////////////////////////
-// Name: gtk/slider.cpp
+// Name: src/gtk/slider.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "slider.h"
-#endif
-
-#include "wx/slider.h"
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
#if wxUSE_SLIDER
-#include "wx/utils.h"
-
-#include <math.h>
-
-#include <gdk/gdk.h>
-#include <gtk/gtk.h>
+#include "wx/slider.h"
-//-----------------------------------------------------------------------------
-// idle system
-//-----------------------------------------------------------------------------
+#ifndef WX_PRECOMP
+ #include "wx/utils.h"
+#endif
-extern void wxapp_install_idle_handler();
-extern bool g_isIdle;
+#include "wx/math.h"
+#include "wx/gtk/private.h"
//-----------------------------------------------------------------------------
// data
extern bool g_blockEventsOnDrag;
-static const float sensitivity = 0.02;
+// ----------------------------------------------------------------------------
+// helper functions
+// ----------------------------------------------------------------------------
+
+// compare 2 adjustment values up to some (hardcoded) precision
+static inline bool AreSameAdjustValues(double x, double y)
+{
+ return fabs(x - y) < 0.02;
+}
+
+static inline int AdjustValueToInt(double x)
+{
+ // we want to round to the nearest integer, i.e. 0.9 is rounded to 1 and
+ // -0.9 is rounded to -1
+ return (int)(x < 0 ? x - 0.5 : x + 0.5);
+}
+
+// process a scroll event
+static void
+ProcessScrollEvent(wxSlider *win, wxEventType evtType, double dvalue)
+{
+ const int orient = win->HasFlag(wxSL_VERTICAL) ? wxVERTICAL
+ : wxHORIZONTAL;
+
+ const int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
+
+ // if we have any "special" event (i.e. the value changed by a line or a
+ // page), send this specific event first
+ if ( evtType != wxEVT_NULL )
+ {
+ wxScrollEvent event( evtType, win->GetId(), value, orient );
+ event.SetEventObject( win );
+ win->GetEventHandler()->ProcessEvent( event );
+ }
+
+ // but, in any case, except if we're dragging the slider (and so the change
+ // is not definitive), send a generic "changed" event
+ if ( evtType != wxEVT_SCROLL_THUMBTRACK )
+ {
+ wxScrollEvent event(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient);
+ event.SetEventObject( win );
+ win->GetEventHandler()->ProcessEvent( event );
+ }
+
+ // and also generate a command event for compatibility
+ wxCommandEvent event( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
+ event.SetEventObject( win );
+ event.SetInt( value );
+ win->GetEventHandler()->ProcessEvent( event );
+}
//-----------------------------------------------------------------------------
// "value_changed"
//-----------------------------------------------------------------------------
-static void gtk_slider_callback( GtkAdjustment *adjust, wxSlider *win )
+extern "C" {
+static void gtk_slider_callback( GtkAdjustment *adjust,
+ wxSlider *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;
+ const double dvalue = adjust->value;
+ const double diff = dvalue - win->m_oldPos;
+ if ( AreSameAdjustValues(diff, 0) )
+ return;
+
+ wxEventType evtType;
+ if ( win->m_isScrolling )
+ evtType = wxEVT_SCROLL_THUMBTRACK;
+ // it could seem that UP/DOWN are inversed but this is what wxMSW does
+ else if ( AreSameAdjustValues(diff, adjust->step_increment) )
+ evtType = wxEVT_SCROLL_LINEDOWN;
+ else if ( AreSameAdjustValues(diff, -adjust->step_increment) )
+ evtType = wxEVT_SCROLL_LINEUP;
+ else if ( AreSameAdjustValues(diff, adjust->page_increment) )
+ evtType = wxEVT_SCROLL_PAGEDOWN;
+ else if ( AreSameAdjustValues(diff, -adjust->page_increment) )
+ evtType = wxEVT_SCROLL_PAGEUP;
+ else if ( AreSameAdjustValues(adjust->value, adjust->lower) )
+ evtType = wxEVT_SCROLL_TOP;
+ else if ( AreSameAdjustValues(adjust->value, adjust->upper) )
+ evtType = wxEVT_SCROLL_BOTTOM;
+ else
+ evtType = wxEVT_NULL; // wxEVT_SCROLL_CHANGED will still be generated
- win->m_oldPos = adjust->value;
+ ProcessScrollEvent(win, evtType, dvalue);
- GtkRange *range = GTK_RANGE( win->m_widget );
+ win->m_oldPos = dvalue;
+}
- wxEventType command = wxEVT_SCROLL_THUMBTRACK;
- if (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLL_LINEUP;
- else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD) command = wxEVT_SCROLL_LINEDOWN;
- 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;
+static gint gtk_slider_button_press_callback( GtkWidget * /* widget */,
+ GdkEventButton * /* gdk_event */,
+ wxWindowGTK *win)
+{
+ // indicate that the thumb is being dragged with the mouse
+ win->m_isScrolling = true;
- double dvalue = adjust->value;
- int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
+ return FALSE;
+}
- int orient = win->GetWindowStyleFlag() & wxSL_VERTICAL ? wxVERTICAL
- : wxHORIZONTAL;
+static gint gtk_slider_button_release_callback( GtkWidget *scale,
+ GdkEventButton * /* gdk_event */,
+ wxSlider *win)
+{
+ // not scrolling any longer
+ win->m_isScrolling = false;
- wxScrollEvent event( command, win->GetId(), value, orient );
- event.SetEventObject( win );
- win->GetEventHandler()->ProcessEvent( event );
+ ProcessScrollEvent(win, wxEVT_SCROLL_THUMBRELEASE,
+ GTK_RANGE(scale)->adjustment->value);
+
+ return FALSE;
+}
- wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
- cevent.SetEventObject( win );
- cevent.SetInt( value );
- win->GetEventHandler()->ProcessEvent( cevent );
}
//-----------------------------------------------------------------------------
const wxPoint& pos, const wxSize& size,
long style, const wxValidator& validator, const wxString& name )
{
- m_acceptsFocus = TRUE;
- m_needParent = TRUE;
+ m_acceptsFocus = true;
+ m_needParent = true;
if (!PreCreation( parent, pos, size ) ||
!CreateBase( parent, id, pos, size, style, validator, name ))
{
wxFAIL_MSG( wxT("wxSlider creation failed") );
- return FALSE;
+ return false;
}
m_oldPos = 0.0;
m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
- gtk_signal_connect( GTK_OBJECT(m_adjust),
- "value_changed",
- (GtkSignalFunc) gtk_slider_callback,
- (gpointer) this );
+ if (style & wxSL_INVERSE)
+ gtk_range_set_inverted( GTK_RANGE(m_widget), TRUE );
+
+ GtkEnableEvents();
+ g_signal_connect (m_widget, "button_press_event",
+ G_CALLBACK (gtk_slider_button_press_callback),
+ this);
+ g_signal_connect (m_widget, "button_release_event",
+ G_CALLBACK (gtk_slider_button_release_callback),
+ this);
SetRange( minValue, maxValue );
SetValue( value );
m_parent->DoAddChild( this );
- PostCreation();
-
- SetBackgroundColour( parent->GetBackgroundColour() );
+ PostCreation(size);
- Show( TRUE );
-
- return TRUE;
+ return true;
}
int wxSlider::GetValue() const
{
- // we want to round to the nearest integer, i.e. 0.9 is rounded to 1 and
- // -0.9 is rounded to -1
- double val = m_adjust->value;
- return (int)(val < 0 ? val - 0.5 : val + 0.5);
+ return AdjustValueToInt(m_adjust->value);
}
void wxSlider::SetValue( int value )
{
- float fpos = (float)value;
+ double fpos = (double)value;
m_oldPos = fpos;
- if (fabs(fpos-m_adjust->value) < 0.2) return;
+ if ( AreSameAdjustValues(fpos, m_adjust->value) )
+ return;
m_adjust->value = fpos;
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
+ GtkDisableEvents();
+
+ g_signal_emit_by_name (m_adjust, "value_changed");
+
+ GtkEnableEvents();
}
void wxSlider::SetRange( int minValue, int maxValue )
{
- float fmin = (float)minValue;
- float fmax = (float)maxValue;
+ double fmin = (double)minValue;
+ double fmax = (double)maxValue;
if ((fabs(fmin-m_adjust->lower) < 0.2) &&
(fabs(fmax-m_adjust->upper) < 0.2))
m_adjust->step_increment = 1.0;
m_adjust->page_increment = ceil((fmax-fmin) / 10.0);
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+ GtkDisableEvents();
+
+ g_signal_emit_by_name (m_adjust, "changed");
+
+ GtkEnableEvents();
}
int wxSlider::GetMin() const
void wxSlider::SetPageSize( int pageSize )
{
- float fpage = (float)pageSize;
+ double fpage = (double)pageSize;
if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
m_adjust->page_increment = fpage;
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+ GtkDisableEvents();
+
+ g_signal_emit_by_name (m_adjust, "changed");
+
+ GtkEnableEvents();
}
int wxSlider::GetPageSize() const
void wxSlider::SetThumbLength( int len )
{
- float flen = (float)len;
+ double flen = (double)len;
if (fabs(flen-m_adjust->page_size) < 0.2) return;
m_adjust->page_size = flen;
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+ GtkDisableEvents();
+
+ g_signal_emit_by_name (m_adjust, "changed");
+
+ GtkEnableEvents();
}
int wxSlider::GetThumbLength() const
bool wxSlider::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 (range->event_window == window);
}
-void wxSlider::ApplyWidgetStyle()
+void wxSlider::GtkDisableEvents()
{
- SetWidgetStyle();
- gtk_widget_set_style( m_widget, m_widgetStyle );
+ g_signal_handlers_disconnect_by_func (m_adjust,
+ (gpointer) gtk_slider_callback,
+ this);
}
-#endif
+void wxSlider::GtkEnableEvents()
+{
+ g_signal_connect (m_adjust, "value_changed",
+ G_CALLBACK (gtk_slider_callback), this);
+}
+
+// static
+wxVisualAttributes
+wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
+{
+ return GetDefaultAttributesFromGTKWidget(gtk_vscale_new);
+}
+
+#endif // wxUSE_SLIDER
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