/////////////////////////////////////////////////////////////////////////////
-// Name: slider.cpp
+// Name: gtk/slider.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
/////////////////////////////////////////////////////////////////////////////
-
-#ifdef __GNUG__
-#pragma implementation "slider.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
#include "wx/slider.h"
+
+#if wxUSE_SLIDER
+
#include "wx/utils.h"
+#include "wx/math.h"
+#include "wx/gtk/private.h"
//-----------------------------------------------------------------------------
-// data
+// idle system
//-----------------------------------------------------------------------------
-extern bool g_blockEventsOnDrag;
+extern void wxapp_install_idle_handler();
+extern bool g_isIdle;
//-----------------------------------------------------------------------------
-// "value_changed"
+// data
//-----------------------------------------------------------------------------
-static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *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->ProcessEvent( event );
-
- wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
- cevent.SetEventObject( win );
- win->ProcessEvent( cevent );
+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;
+}
+
+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,
+ 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;
+ 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;
+
+ ProcessScrollEvent(win, evtType, dvalue);
+
+ win->m_oldPos = dvalue;
+}
-wxSlider::wxSlider(void)
+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,
long style, const wxValidator& validator, const wxString& name )
{
- m_needParent = TRUE;
-
- PreCreation( parent, id, pos, size, style, name );
-
- SetValidator( validator );
-
- m_oldPos = 0.0;
-
- if (style & wxSL_VERTICAL == wxSL_VERTICAL)
- m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
- else
- m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
-
- 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 );
- SetRange( minValue, maxValue );
- SetValue( value );
-
- PostCreation();
-
- Show( TRUE );
-
- return 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;
+ }
+
+ m_oldPos = 0.0;
+
+ if (style & wxSL_VERTICAL)
+ 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)
+ {
+ 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) );
+
+ 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(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;
- 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" );
+ double fpos = (double)value;
+ m_oldPos = fpos;
+ if ( AreSameAdjustValues(fpos, m_adjust->value) )
+ return;
+
+ m_adjust->value = fpos;
+
+ 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;
-
- if ((fabs(fmin-m_adjust->lower) < 0.2) &&
- (fabs(fmax-m_adjust->upper) < 0.2))
- return;
-
- m_adjust->lower = fmin;
- m_adjust->upper = fmax;
+ double fmin = (double)minValue;
+ double fmax = (double)maxValue;
+
+ if ((fabs(fmin-m_adjust->lower) < 0.2) &&
+ (fabs(fmax-m_adjust->upper) < 0.2))
+ {
+ return;
+ }
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+ m_adjust->lower = fmin;
+ m_adjust->upper = fmax;
+ m_adjust->step_increment = 1.0;
+ m_adjust->page_increment = ceil((fmax-fmin) / 10.0);
+
+ GtkDisableEvents();
+
+ g_signal_emit_by_name (m_adjust, "changed");
+
+ GtkEnableEvents();
}
-int wxSlider::GetMin(void) const
+int wxSlider::GetMin() const
{
- return (int)(m_adjust->lower+0.5);
+ return (int)ceil(m_adjust->lower);
}
-int wxSlider::GetMax(void) const
+int wxSlider::GetMax() const
{
- return (int)(m_adjust->upper+0.5);
+ return (int)ceil(m_adjust->upper);
}
void wxSlider::SetPageSize( int pageSize )
{
- float fpage = (float)pageSize;
-
- if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
-
- m_adjust->page_increment = fpage;
+ double fpage = (double)pageSize;
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
-}
+ if (fabs(fpage-m_adjust->page_increment) < 0.2) return;
-int wxSlider::GetPageSize(void) const
-{
- return (int)(m_adjust->page_increment+0.5);
-}
+ m_adjust->page_increment = fpage;
-void wxSlider::SetThumbLength( int len )
-{
- float flen = (float)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" );
-}
+ g_signal_emit_by_name (m_adjust, "changed");
-int wxSlider::GetThumbLength(void) const
-{
- return (int)(m_adjust->page_size+0.5);
+ GtkEnableEvents();
}
-void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
+int wxSlider::GetPageSize() const
{
+ return (int)ceil(m_adjust->page_increment);
}
-int wxSlider::GetLineSize(void) const
+void wxSlider::SetThumbLength( int len )
{
- return 0;
-}
-
-// not supported in wxGTK (and GTK)
+ double flen = (double)len;
-void wxSlider::GetSize( int *x, int *y ) const
-{
- wxWindow::GetSize( x, y );
-}
+ if (fabs(flen-m_adjust->page_size) < 0.2) return;
-void wxSlider::SetSize( int x, int y, int width, int height, int sizeFlags )
-{
- wxWindow::SetSize( x, y, width, height, sizeFlags );
-}
+ m_adjust->page_size = flen;
-void wxSlider::GetPosition( int *x, int *y ) const
-{
- wxWindow::GetPosition( x, y );
-}
+ GtkDisableEvents();
-void wxSlider::SetTick( int WXUNUSED(tickPos) )
-{
-}
+ g_signal_emit_by_name (m_adjust, "changed");
-void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
-{
+ GtkEnableEvents();
}
-int wxSlider::GetTickFreq(void) const
+int wxSlider::GetThumbLength() const
{
- return 0;
+ return (int)ceil(m_adjust->page_size);
}
-void wxSlider::ClearTicks(void)
+void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
{
}
-void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
+int wxSlider::GetLineSize() const
{
+ return 0;
}
-int wxSlider::GetSelEnd(void) const
+bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
{
- return 0;
+ GtkRange *range = GTK_RANGE(m_widget);
+ return (range->event_window == window);
}
-int wxSlider::GetSelStart(void) const
+void wxSlider::GtkDisableEvents()
{
- return 0;
+ g_signal_handlers_disconnect_by_func (m_adjust,
+ (gpointer) gtk_slider_callback,
+ this);
}
-void wxSlider::ClearSel(void)
+void wxSlider::GtkEnableEvents()
{
+ g_signal_connect (m_adjust, "value_changed",
+ G_CALLBACK (gtk_slider_callback), 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);
}
-
+#endif
projects / wxWidgets.git / blobdiff