/////////////////////////////////////////////////////////////////////////////
-// Name: slider.cpp
+// Name: gtk/slider.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "slider.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
#include "wx/slider.h"
-#include "wx/utils.h"
-#include <math.h>
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#if wxUSE_SLIDER
+
+#include "wx/utils.h"
+#include "wx/math.h"
+#include "wx/gtk1/private.h"
//-----------------------------------------------------------------------------
// idle system
// data
//-----------------------------------------------------------------------------
-extern bool g_blockEventsOnDrag;
+extern bool g_blockEventsOnDrag;
-//-----------------------------------------------------------------------------
-// "value_changed"
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// helper functions
+// ----------------------------------------------------------------------------
-static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *win )
-{
- if (g_isIdle) wxapp_install_idle_handler();
+// compare 2 adjustment values up to some (hardcoded) precision
+static inline bool AreSameAdjustValues(double x, double y)
+{
+ return fabs(x - y) < 0.02;
+}
- if (!win->m_hasVMT) return;
- if (g_blockEventsOnDrag) return;
-
- float diff = win->m_adjust->value - win->m_oldPos;
- if (fabs(diff) < 0.2) return;
- win->m_oldPos = win->m_adjust->value;
-
- wxEventType command = wxEVT_NULL;
-
- float line_step = win->m_adjust->step_increment;
- float page_step = win->m_adjust->page_increment;
-
- 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;
-
- int value = (int)ceil(win->m_adjust->value);
-
- int orient = wxHORIZONTAL;
- if (win->GetWindowStyleFlag() & wxSB_VERTICAL == wxSB_VERTICAL) orient = wxVERTICAL;
-
- wxScrollEvent event( command, win->GetId(), value, orient );
+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)
+{
+ int orient = win->GetWindowStyleFlag() & wxSL_VERTICAL ? wxVERTICAL
+ : wxHORIZONTAL;
+
+ int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
+ wxScrollEvent event( evtType, win->GetId(), value, orient );
event.SetEventObject( win );
win->GetEventHandler()->ProcessEvent( event );
-
+
+ if ( evtType != wxEVT_SCROLL_THUMBTRACK )
+ {
+ wxScrollEvent event2(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient);
+ event2.SetEventObject( win );
+ win->GetEventHandler()->ProcessEvent( event2 );
+ }
+
wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
cevent.SetEventObject( win );
+ cevent.SetInt( value );
win->GetEventHandler()->ProcessEvent( cevent );
}
//-----------------------------------------------------------------------------
-// wxSlider
+// "value_changed"
//-----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
+extern "C" {
+static void gtk_slider_callback( GtkAdjustment *adjust,
+ SCROLLBAR_CBACK_ARG
+ wxSlider *win )
+{
+ if (g_isIdle) wxapp_install_idle_handler();
-wxSlider::wxSlider(void)
+ if (!win->m_hasVMT) return;
+ if (g_blockEventsOnDrag) return;
+
+ const double dvalue = adjust->value;
+ const double diff = dvalue - win->m_oldPos;
+ if ( AreSameAdjustValues(diff, 0) )
+ return;
+
+ wxEventType evtType;
+ evtType = GtkScrollTypeToWx(GET_SCROLL_TYPE(win->m_widget));
+
+ ProcessScrollEvent(win, evtType, dvalue);
+
+ win->m_oldPos = dvalue;
+}
+
+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;
+
+ return FALSE;
}
-wxSlider::~wxSlider(void)
+static gint gtk_slider_button_release_callback( GtkWidget *scale,
+ GdkEventButton * /* gdk_event */,
+ wxSlider *win)
{
+ // not scrolling any longer
+ win->m_isScrolling = false;
+
+ ProcessScrollEvent(win, wxEVT_SCROLL_THUMBRELEASE,
+ GTK_RANGE(scale)->adjustment->value);
+
+ return FALSE;
}
+}
+
+//-----------------------------------------------------------------------------
+// wxSlider
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl)
+
bool wxSlider::Create(wxWindow *parent, wxWindowID id,
int value, int minValue, int maxValue,
const wxPoint& pos, const wxSize& size,
{
m_acceptsFocus = TRUE;
m_needParent = TRUE;
-
- PreCreation( parent, id, pos, size, style, name );
-
- SetValidator( validator );
+
+ if (!PreCreation( parent, pos, size ) ||
+ !CreateBase( parent, id, pos, size, style, validator, name ))
+ {
+ wxFAIL_MSG( wxT("wxSlider creation failed") );
+ return FALSE;
+ }
m_oldPos = 0.0;
m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
else
m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
-
+
if (style & wxSL_LABELS)
{
gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE );
-
+ gtk_scale_set_digits( GTK_SCALE( m_widget ), 0 );
+
/* labels need more space and too small window will
cause junk to appear on the dialog */
if (style & wxSL_VERTICAL)
gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
-
- gtk_signal_connect( GTK_OBJECT(m_adjust),
- "value_changed",
- (GtkSignalFunc) gtk_slider_callback,
+
+ GtkEnableEvents();
+ gtk_signal_connect( GTK_OBJECT(m_widget),
+ "button_press_event",
+ (GtkSignalFunc)gtk_slider_button_press_callback,
(gpointer) this );
-
+ gtk_signal_connect( GTK_OBJECT(m_widget),
+ "button_release_event",
+ (GtkSignalFunc)gtk_slider_button_release_callback,
+ (gpointer) this );
+
SetRange( minValue, maxValue );
SetValue( value );
-
+
m_parent->DoAddChild( this );
-
- PostCreation();
-
- SetBackgroundColour( parent->GetBackgroundColour() );
- Show( TRUE );
-
+ PostCreation(size);
+
return TRUE;
}
-int wxSlider::GetValue(void) const
+int wxSlider::GetValue() const
{
- return (int)(m_adjust->value+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;
-
+
+ GtkDisableEvents();
+
gtk_signal_emit_by_name( GTK_OBJECT(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))
{
return;
}
-
+
m_adjust->lower = fmin;
m_adjust->upper = fmax;
+ m_adjust->step_increment = 1.0;
+ m_adjust->page_increment = ceil((fmax-fmin) / 10.0);
+
+ GtkDisableEvents();
gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+
+ GtkEnableEvents();
}
-int wxSlider::GetMin(void) const
+int wxSlider::GetMin() const
{
return (int)ceil(m_adjust->lower);
}
-int wxSlider::GetMax(void) const
+int wxSlider::GetMax() const
{
return (int)ceil(m_adjust->upper);
}
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;
+ GtkDisableEvents();
+
gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+
+ GtkEnableEvents();
}
-int wxSlider::GetPageSize(void) const
+int wxSlider::GetPageSize() const
{
return (int)ceil(m_adjust->page_increment);
}
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;
+ GtkDisableEvents();
+
gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+
+ GtkEnableEvents();
}
-int wxSlider::GetThumbLength(void) const
+int wxSlider::GetThumbLength() const
{
return (int)ceil(m_adjust->page_size);
}
{
}
-int wxSlider::GetLineSize(void) const
+int wxSlider::GetLineSize() const
{
return 0;
}
-void wxSlider::SetTick( int WXUNUSED(tickPos) )
-{
-}
-
-void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
-{
-}
-
-int wxSlider::GetTickFreq(void) const
-{
- return 0;
-}
-
-void wxSlider::ClearTicks(void)
-{
-}
-
-void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
-{
-}
-
-int wxSlider::GetSelEnd(void) const
+bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
{
- return 0;
+ 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) );
}
-int wxSlider::GetSelStart(void) const
+void wxSlider::GtkDisableEvents()
{
- return 0;
+ gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
+ GTK_SIGNAL_FUNC(gtk_slider_callback),
+ (gpointer) this );
}
-void wxSlider::ClearSel(void)
+void wxSlider::GtkEnableEvents()
{
+ gtk_signal_connect( GTK_OBJECT (m_adjust),
+ "value_changed",
+ GTK_SIGNAL_FUNC(gtk_slider_callback),
+ (gpointer) this );
}
-bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
+// static
+wxVisualAttributes
+wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
- 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 GetDefaultAttributesFromGTKWidget(gtk_vscale_new);
}
-void wxSlider::ApplyWidgetStyle()
-{
- SetWidgetStyle();
- gtk_widget_set_style( m_widget, m_widgetStyle );
-}
+#endif
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