Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Tree: d4a94adb6f
Fetching contributors…

Cannot retrieve contributors at this time

337 lines (260 sloc) 8.798 kB
/////////////////////////////////////////////////////////////////////////////
// Name: src/gtk1/slider.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if wxUSE_SLIDER
#include "wx/slider.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;
// ----------------------------------------------------------------------------
// 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;
}
// 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->HandleWindowEvent( event );
if ( evtType != wxEVT_SCROLL_THUMBTRACK )
{
wxScrollEvent event2(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient);
event2.SetEventObject( win );
win->HandleWindowEvent( event2 );
}
wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
cevent.SetEventObject( win );
cevent.SetInt( value );
win->HandleWindowEvent( cevent );
}
//-----------------------------------------------------------------------------
// "value_changed"
//-----------------------------------------------------------------------------
extern "C" {
static void gtk_slider_callback( GtkAdjustment *adjust,
SCROLLBAR_CBACK_ARG
wxSlider *win )
{
if (g_isIdle) wxapp_install_idle_handler();
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;
}
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
//-----------------------------------------------------------------------------
bool wxSlider::Create(wxWindow *parent, wxWindowID id,
int value, int minValue, int maxValue,
const wxPoint& pos, const wxSize& size,
long style, const wxValidator& validator, const wxString& name )
{
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;
}
m_oldPos = 0.0;
if (style & wxSL_VERTICAL)
m_widget = gtk_vscale_new( NULL );
else
m_widget = gtk_hscale_new( 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)
{
wxSize sz( size );
if (sz.x < 35)
{
sz.x = 35;
SetSize( sz );
}
}
else
{
wxSize sz( size );
if (sz.y < 35)
{
sz.y = 35;
SetSize( sz );
}
}
}
else
gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
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(size);
return true;
}
int wxSlider::GetValue() const
{
return wxRound(m_adjust->value);
}
void wxSlider::SetValue( int value )
{
double fpos = (double)value;
m_oldPos = fpos;
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 )
{
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() const
{
return (int)ceil(m_adjust->lower);
}
int wxSlider::GetMax() const
{
return (int)ceil(m_adjust->upper);
}
void wxSlider::SetPageSize( int 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() const
{
return (int)ceil(m_adjust->page_increment);
}
void wxSlider::SetThumbLength( int 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() const
{
return (int)ceil(m_adjust->page_size);
}
void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
{
}
int wxSlider::GetLineSize() const
{
return 0;
}
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) );
}
void wxSlider::GtkDisableEvents()
{
gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
GTK_SIGNAL_FUNC(gtk_slider_callback),
(gpointer) this );
}
void wxSlider::GtkEnableEvents()
{
gtk_signal_connect( GTK_OBJECT (m_adjust),
"value_changed",
GTK_SIGNAL_FUNC(gtk_slider_callback),
(gpointer) this );
}
// static
wxVisualAttributes
wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
return GetDefaultAttributesFromGTKWidget(gtk_vscale_new);
}
#endif // wxUSE_SLIDER
Jump to Line
Something went wrong with that request. Please try again.