/////////////////////////////////////////////////////////////////////////////
-// Name: slider.cpp
+// Name: src/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
-
-#include "wx/slider.h"
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
#if wxUSE_SLIDER
-#include "wx/utils.h"
+#include "wx/slider.h"
-#include <math.h>
+#ifndef WX_PRECOMP
+ #include "wx/utils.h"
+ #include "wx/math.h"
+#endif
-#include <gdk/gdk.h>
#include <gtk/gtk.h>
//-----------------------------------------------------------------------------
-// idle system
+// data
//-----------------------------------------------------------------------------
-extern void wxapp_install_idle_handler();
-extern bool g_isIdle;
+extern bool g_blockEventsOnDrag;
+
+// ----------------------------------------------------------------------------
+// helper functions
+// ----------------------------------------------------------------------------
+
+// process a scroll event
+static void
+ProcessScrollEvent(wxSlider *win, wxEventType evtType)
+{
+ const int orient = win->HasFlag(wxSL_VERTICAL) ? wxVERTICAL
+ : wxHORIZONTAL;
+
+ const int value = win->GetValue();
+
+ // 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->HandleWindowEvent( 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->HandleWindowEvent( event );
+ }
+
+ // and also generate a command event for compatibility
+ wxCommandEvent event( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
+ event.SetEventObject( win );
+ event.SetInt( value );
+ win->HandleWindowEvent( event );
+}
+
+static inline wxEventType GtkScrollTypeToWx(int scrollType)
+{
+ wxEventType eventType;
+ switch (scrollType)
+ {
+ case GTK_SCROLL_STEP_BACKWARD:
+ case GTK_SCROLL_STEP_LEFT:
+ case GTK_SCROLL_STEP_UP:
+ eventType = wxEVT_SCROLL_LINEUP;
+ break;
+ case GTK_SCROLL_STEP_DOWN:
+ case GTK_SCROLL_STEP_FORWARD:
+ case GTK_SCROLL_STEP_RIGHT:
+ eventType = wxEVT_SCROLL_LINEDOWN;
+ break;
+ case GTK_SCROLL_PAGE_BACKWARD:
+ case GTK_SCROLL_PAGE_LEFT:
+ case GTK_SCROLL_PAGE_UP:
+ eventType = wxEVT_SCROLL_PAGEUP;
+ break;
+ case GTK_SCROLL_PAGE_DOWN:
+ case GTK_SCROLL_PAGE_FORWARD:
+ case GTK_SCROLL_PAGE_RIGHT:
+ eventType = wxEVT_SCROLL_PAGEDOWN;
+ break;
+ case GTK_SCROLL_START:
+ eventType = wxEVT_SCROLL_TOP;
+ break;
+ case GTK_SCROLL_END:
+ eventType = wxEVT_SCROLL_BOTTOM;
+ break;
+ case GTK_SCROLL_JUMP:
+ eventType = wxEVT_SCROLL_THUMBTRACK;
+ break;
+ default:
+ wxFAIL_MSG(wxT("Unknown GtkScrollType"));
+ eventType = wxEVT_NULL;
+ break;
+ }
+ return eventType;
+}
+
+// Determine if increment is the same as +/-x, allowing for some small
+// difference due to possible inexactness in floating point arithmetic
+static inline bool IsScrollIncrement(double increment, double x)
+{
+ wxASSERT(increment > 0);
+ const double tolerance = 1.0 / 1024;
+ return fabs(increment - fabs(x)) < tolerance;
+}
//-----------------------------------------------------------------------------
-// data
+// "value_changed"
//-----------------------------------------------------------------------------
-extern bool g_blockEventsOnDrag;
+extern "C" {
+static void
+gtk_value_changed(GtkRange* range, wxSlider* win)
+{
+ GtkAdjustment* adj = gtk_range_get_adjustment (range);
+ const int pos = wxRound(adj->value);
+ const double oldPos = win->m_pos;
+ win->m_pos = adj->value;
+
+ if (!win->m_hasVMT || g_blockEventsOnDrag)
+ return;
-static const float sensitivity = 0.02;
+ if (win->GTKEventsDisabled())
+ {
+ win->m_scrollEventType = GTK_SCROLL_NONE;
+ return;
+ }
+
+ wxEventType eventType = wxEVT_NULL;
+ if (win->m_isScrolling)
+ {
+ eventType = wxEVT_SCROLL_THUMBTRACK;
+ }
+ else if (win->m_scrollEventType != GTK_SCROLL_NONE)
+ {
+ // Scroll event from "move-slider" (keyboard)
+ eventType = GtkScrollTypeToWx(win->m_scrollEventType);
+ }
+ else if (win->m_mouseButtonDown)
+ {
+ // Difference from last change event
+ const double diff = adj->value - oldPos;
+ const bool isDown = diff > 0;
+
+ if (IsScrollIncrement(adj->page_increment, diff))
+ {
+ eventType = isDown ? wxEVT_SCROLL_PAGEDOWN : wxEVT_SCROLL_PAGEUP;
+ }
+ else if (wxIsSameDouble(adj->value, 0))
+ {
+ eventType = wxEVT_SCROLL_PAGEUP;
+ }
+ else if (wxIsSameDouble(adj->value, adj->upper))
+ {
+ eventType = wxEVT_SCROLL_PAGEDOWN;
+ }
+ else
+ {
+ // Assume track event
+ eventType = wxEVT_SCROLL_THUMBTRACK;
+ // Remember that we're tracking
+ win->m_isScrolling = true;
+ }
+ }
+
+ win->m_scrollEventType = GTK_SCROLL_NONE;
+
+ // If integral position has changed
+ if (wxRound(oldPos) != pos)
+ {
+ ProcessScrollEvent(win, eventType);
+ win->m_needThumbRelease = eventType == wxEVT_SCROLL_THUMBTRACK;
+ }
+}
+}
//-----------------------------------------------------------------------------
-// "value_changed"
+// "move_slider" (keyboard event)
//-----------------------------------------------------------------------------
-static void gtk_slider_callback( GtkAdjustment *adjust, wxSlider *win )
+extern "C" {
+static void
+gtk_move_slider(GtkRange*, GtkScrollType scrollType, wxSlider* win)
{
- if (g_isIdle) wxapp_install_idle_handler();
+ // Save keyboard scroll type for "value_changed" handler
+ win->m_scrollEventType = scrollType;
+}
+}
- if (!win->m_hasVMT) return;
- if (g_blockEventsOnDrag) return;
+//-----------------------------------------------------------------------------
+// "button_press_event"
+//-----------------------------------------------------------------------------
- float diff = adjust->value - win->m_oldPos;
- if (fabs(diff) < sensitivity) return;
+extern "C" {
+static gboolean
+gtk_button_press_event(GtkWidget*, GdkEventButton*, wxSlider* win)
+{
+ win->m_mouseButtonDown = true;
- win->m_oldPos = adjust->value;
+ return false;
+}
+}
- GtkRange *range = GTK_RANGE( win->m_widget );
+//-----------------------------------------------------------------------------
+// "event_after"
+//-----------------------------------------------------------------------------
- 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;
+extern "C" {
+static void
+gtk_event_after(GtkRange* range, GdkEvent* event, wxSlider* win)
+{
+ if (event->type == GDK_BUTTON_RELEASE)
+ {
+ g_signal_handlers_block_by_func(range, (gpointer) gtk_event_after, win);
- int value = (int)ceil(adjust->value);
+ if (win->m_needThumbRelease)
+ {
+ win->m_needThumbRelease = false;
+ ProcessScrollEvent(win, wxEVT_SCROLL_THUMBRELEASE);
+ }
+ // Keep slider at an integral position
+ win->GTKDisableEvents();
+ gtk_range_set_value(GTK_RANGE (win->m_scale), win->GetValue());
+ win->GTKEnableEvents();
+ }
+}
+}
- int orient = wxHORIZONTAL;
- if ( (win->GetWindowStyleFlag() & wxSB_VERTICAL) == wxSB_VERTICAL)
- orient = wxVERTICAL;
+//-----------------------------------------------------------------------------
+// "button_release_event"
+//-----------------------------------------------------------------------------
- wxScrollEvent event( command, win->GetId(), value, orient );
- event.SetEventObject( win );
- win->GetEventHandler()->ProcessEvent( event );
+extern "C" {
+static gboolean
+gtk_button_release_event(GtkRange* range, GdkEventButton*, wxSlider* win)
+{
+ win->m_mouseButtonDown = false;
+ if (win->m_isScrolling)
+ {
+ win->m_isScrolling = false;
+ g_signal_handlers_unblock_by_func(range, (gpointer) gtk_event_after, win);
+ }
+ return false;
+}
+}
+
+//-----------------------------------------------------------------------------
+// "format_value"
+//-----------------------------------------------------------------------------
- wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() );
- cevent.SetEventObject( win );
- cevent.SetInt( value );
- win->GetEventHandler()->ProcessEvent( cevent );
+extern "C" {
+static gchar* gtk_format_value(GtkScale*, double value, void*)
+{
+ // Format value as nearest integer
+ return g_strdup_printf("%d", wxRound(value));
+}
}
//-----------------------------------------------------------------------------
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 )
+wxSlider::wxSlider()
+{
+ m_pos = 0;
+ m_scrollEventType = GTK_SCROLL_NONE;
+ m_needThumbRelease = false;
+ m_blockScrollEvent = false;
+}
+
+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;
+ m_pos = value;
+ m_scrollEventType = GTK_SCROLL_NONE;
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;
if (style & wxSL_VERTICAL)
- m_widget = gtk_vscale_new( (GtkAdjustment *) NULL );
+ m_scale = gtk_vscale_new( NULL );
else
- m_widget = gtk_hscale_new( (GtkAdjustment *) NULL );
+ m_scale = gtk_hscale_new( NULL );
+ g_object_ref(m_scale);
- if (style & wxSL_LABELS)
+ if (style & wxSL_MIN_MAX_LABELS)
{
- gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE );
- gtk_scale_set_digits( GTK_SCALE( m_widget ), 0 );
+ gtk_widget_show( m_scale );
+
+ if (style & wxSL_VERTICAL)
+ m_widget = gtk_hbox_new(false, 0);
+ else
+ m_widget = gtk_vbox_new(false, 0);
+ g_object_ref(m_widget);
+ gtk_widget_show( m_widget );
+ gtk_container_add( GTK_CONTAINER(m_widget), m_scale );
- /* labels need more space and too small window will
- cause junk to appear on the dialog */
+ GtkWidget *box;
if (style & wxSL_VERTICAL)
+ box = gtk_vbox_new(false,0);
+ else
+ box = gtk_hbox_new(false,0);
+ g_object_ref(box);
+ gtk_widget_show(box);
+ gtk_container_add( GTK_CONTAINER(m_widget), box );
+
+ m_minLabel = gtk_label_new(NULL);
+ g_object_ref(m_minLabel);
+ gtk_widget_show( m_minLabel );
+ gtk_container_add( GTK_CONTAINER(box), m_minLabel );
+ gtk_box_set_child_packing( GTK_BOX(box), m_minLabel, FALSE, FALSE, 0, GTK_PACK_START );
+
+ // expanding empty space between the min/max labels
+ GtkWidget *space = gtk_label_new(NULL);
+ g_object_ref(space);
+ gtk_widget_show( space );
+ gtk_container_add( GTK_CONTAINER(box), space );
+ gtk_box_set_child_packing( GTK_BOX(box), space, TRUE, FALSE, 0, GTK_PACK_START );
+
+ m_maxLabel = gtk_label_new(NULL);
+ g_object_ref(m_maxLabel);
+ gtk_widget_show( m_maxLabel );
+ gtk_container_add( GTK_CONTAINER(box), m_maxLabel );
+ gtk_box_set_child_packing( GTK_BOX(box), m_maxLabel, FALSE, FALSE, 0, GTK_PACK_END );
+ }
+ else
+ {
+ m_widget = m_scale;
+ m_maxLabel = NULL;
+ m_minLabel = NULL;
+ }
+
+ const bool showValueLabel = (style & wxSL_VALUE_LABEL) != 0;
+ gtk_scale_set_draw_value(GTK_SCALE (m_scale), showValueLabel );
+ if ( showValueLabel )
+ {
+ // position the label appropriately: notice that wxSL_DIRECTION flags
+ // specify the position of the ticks, not label, under MSW and so the
+ // label is on the opposite side
+ GtkPositionType posLabel;
+ if ( style & wxSL_VERTICAL )
{
- wxSize sz( size );
- if (sz.x < 35)
- {
- sz.x = 35;
- SetSize( sz );
- }
+ if ( style & wxSL_LEFT )
+ posLabel = GTK_POS_RIGHT;
+ else // if ( style & wxSL_RIGHT ) -- this is also the default
+ posLabel = GTK_POS_LEFT;
}
- else
+ else // horizontal slider
{
- wxSize sz( size );
- if (sz.y < 35)
- {
- sz.y = 35;
- SetSize( sz );
- }
+ if ( style & wxSL_TOP )
+ posLabel = GTK_POS_BOTTOM;
+ else // if ( style & wxSL_BOTTOM) -- this is again the default
+ posLabel = GTK_POS_TOP;
}
+
+ gtk_scale_set_value_pos( GTK_SCALE(m_scale), posLabel );
}
- else
- gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE );
- m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
+ // Keep full precision in position value
+ gtk_scale_set_digits(GTK_SCALE (m_scale), -1);
- 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_scale), TRUE );
- SetRange( minValue, maxValue );
- SetValue( value );
+ g_signal_connect(m_scale, "button_press_event", G_CALLBACK(gtk_button_press_event), this);
+ g_signal_connect(m_scale, "button_release_event", G_CALLBACK(gtk_button_release_event), this);
+ g_signal_connect(m_scale, "move_slider", G_CALLBACK(gtk_move_slider), this);
+ g_signal_connect(m_scale, "format_value", G_CALLBACK(gtk_format_value), NULL);
+ g_signal_connect(m_scale, "value_changed", G_CALLBACK(gtk_value_changed), this);
+ gulong handler_id = g_signal_connect(m_scale, "event_after", G_CALLBACK(gtk_event_after), this);
+ g_signal_handler_block(m_scale, handler_id);
- m_parent->DoAddChild( this );
+ SetRange( minValue, maxValue );
- PostCreation();
+ // don't call the public SetValue() as it won't do anything unless the
+ // value really changed
+ GTKSetValue( value );
- SetBackgroundColour( parent->GetBackgroundColour() );
+ m_parent->DoAddChild( this );
- Show( TRUE );
+ PostCreation(size);
- return TRUE;
+ return true;
}
-int wxSlider::GetValue() const
+void wxSlider::GTKDisableEvents()
{
- return (int)(m_adjust->value+0.5);
+ m_blockScrollEvent = true;
}
-void wxSlider::SetValue( int value )
+void wxSlider::GTKEnableEvents()
{
- 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" );
-}
-
-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;
- 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" );
+ m_blockScrollEvent = false;
}
-int wxSlider::GetMin() const
+bool wxSlider::GTKEventsDisabled() const
{
- return (int)ceil(m_adjust->lower);
+ return m_blockScrollEvent;
}
-int wxSlider::GetMax() const
+int wxSlider::GetValue() const
{
- return (int)ceil(m_adjust->upper);
+ return wxRound(m_pos);
}
-void wxSlider::SetPageSize( int pageSize )
+void wxSlider::SetValue( int value )
{
- float fpage = (float)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" );
+ if (GetValue() != value)
+ GTKSetValue(value);
}
-int wxSlider::GetPageSize() const
+void wxSlider::GTKSetValue(int value)
{
- return (int)ceil(m_adjust->page_increment);
+ GTKDisableEvents();
+ gtk_range_set_value(GTK_RANGE (m_scale), value);
+ GTKEnableEvents();
}
-void wxSlider::SetThumbLength( int len )
+void wxSlider::SetRange( int minValue, int maxValue )
{
- float flen = (float)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();
+ if (minValue == maxValue)
+ maxValue++;
+ gtk_range_set_range(GTK_RANGE (m_scale), minValue, maxValue);
+ gtk_range_set_increments(GTK_RANGE (m_scale), 1, (maxValue - minValue + 9) / 10);
+ GTKEnableEvents();
+
+ if (HasFlag(wxSL_MIN_MAX_LABELS))
+ {
+ wxString str;
-int wxSlider::GetThumbLength() const
-{
- return (int)ceil(m_adjust->page_size);
-}
+ str.Printf( "%d", minValue );
+ if (HasFlag(wxSL_INVERSE))
+ gtk_label_set_text( GTK_LABEL(m_maxLabel), str.utf8_str() );
+ else
+ gtk_label_set_text( GTK_LABEL(m_minLabel), str.utf8_str() );
-void wxSlider::SetLineSize( int WXUNUSED(lineSize) )
-{
-}
+ str.Printf( "%d", maxValue );
+ if (HasFlag(wxSL_INVERSE))
+ gtk_label_set_text( GTK_LABEL(m_minLabel), str.utf8_str() );
+ else
+ gtk_label_set_text( GTK_LABEL(m_maxLabel), str.utf8_str() );
-int wxSlider::GetLineSize() const
-{
- return 0;
+ }
}
-void wxSlider::SetTick( int WXUNUSED(tickPos) )
+int wxSlider::GetMin() const
{
+ return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->lower);
}
-void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) )
+int wxSlider::GetMax() const
{
+ return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->upper);
}
-int wxSlider::GetTickFreq() const
+void wxSlider::SetPageSize( int pageSize )
{
- return 0;
+ GTKDisableEvents();
+ gtk_range_set_increments(GTK_RANGE (m_scale), GetLineSize(), pageSize);
+ GTKEnableEvents();
}
-void wxSlider::ClearTicks()
+int wxSlider::GetPageSize() const
{
+ return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->page_increment);
}
-void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) )
+// GTK does not support changing the size of the slider
+void wxSlider::SetThumbLength(int)
{
}
-int wxSlider::GetSelEnd() const
+int wxSlider::GetThumbLength() const
{
return 0;
}
-int wxSlider::GetSelStart() const
+void wxSlider::SetLineSize( int lineSize )
{
- return 0;
+ GTKDisableEvents();
+ gtk_range_set_increments(GTK_RANGE (m_scale), lineSize, GetPageSize());
+ GTKEnableEvents();
}
-void wxSlider::ClearSel()
+int wxSlider::GetLineSize() const
{
+ return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->step_increment);
}
-bool wxSlider::IsOwnGtkWindow( GdkWindow *window )
+GdkWindow *wxSlider::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
{
- 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 GTK_RANGE(m_scale)->event_window;
}
-void wxSlider::ApplyWidgetStyle()
+// static
+wxVisualAttributes
+wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
- SetWidgetStyle();
- gtk_widget_set_style( m_widget, m_widgetStyle );
+ return GetDefaultAttributesFromGTKWidget(gtk_vscale_new);
}
-#endif
+#endif // wxUSE_SLIDER
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