/////////////////////////////////////////////////////////////////////////////
-// Name: scrolbar.cpp
+// Name: src/gtk/scrolbar.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
/////////////////////////////////////////////////////////////////////////////
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
-#ifdef __GNUG__
-#pragma implementation "scrolbar.h"
-#endif
+#if wxUSE_SCROLLBAR
#include "wx/scrolbar.h"
-#include "wx/utils.h"
-//-----------------------------------------------------------------------------
-// data
-//-----------------------------------------------------------------------------
+#ifndef WX_PRECOMP
+ #include "wx/utils.h"
+#endif
-extern bool g_blockEventsOnDrag;
+#include "wx/gtk/private.h"
//-----------------------------------------------------------------------------
-// wxScrollBar
+// "value_changed" from scrollbar
//-----------------------------------------------------------------------------
-static void gtk_scrollbar_callback( GtkWidget *WXUNUSED(widget), wxScrollBar *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->GetEventHandler()->ProcessEvent( event );
-
-/*
- wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
- cevent.SetEventObject( win );
- win->ProcessEvent( cevent );
-*/
+extern "C" {
+static void
+gtk_value_changed(GtkRange* range, wxScrollBar* win)
+{
+ wxEventType eventType = win->GetScrollEventType(range);
+ if (eventType != wxEVT_NULL)
+ {
+ const int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
+ const int i = orient == wxVERTICAL;
+ const int value = win->GetThumbPosition();
+ wxScrollEvent event(eventType, win->GetId(), value, orient);
+ event.SetEventObject(win);
+ win->m_blockValueChanged[i] = true;
+ win->GetEventHandler()->ProcessEvent(event);
+ if (!win->m_isScrolling)
+ {
+ wxScrollEvent event(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient);
+ event.SetEventObject(win);
+ win->GetEventHandler()->ProcessEvent(event);
+ }
+ win->m_blockValueChanged[i] = false;
+ }
+}
}
-IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
+//-----------------------------------------------------------------------------
+// "button_press_event" from scrollbar
+//-----------------------------------------------------------------------------
-wxScrollBar::~wxScrollBar(void)
+extern "C" {
+static gboolean
+gtk_button_press_event(GtkRange*, GdkEventButton*, wxScrollBar* win)
{
+ if (g_isIdle) wxapp_install_idle_handler();
+
+ win->m_mouseButtonDown = true;
+ return false;
+}
}
-bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
- const wxPoint& pos, const wxSize& size,
- long style, const wxValidator& validator, const wxString& name )
+//-----------------------------------------------------------------------------
+// "event_after" from scrollbar
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static void
+gtk_event_after(GtkRange* range, GdkEvent* event, wxScrollBar* win)
{
- m_needParent = TRUE;
-
- PreCreation( parent, id, pos, size, style, name );
-
- SetValidator( validator );
+ if (event->type == GDK_BUTTON_RELEASE)
+ {
+ g_signal_handlers_block_by_func(range, (void*)gtk_event_after, win);
- m_oldPos = 0.0;
+ const int value = win->GetThumbPosition();
+ const int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
- if (style & wxSB_VERTICAL == wxSB_VERTICAL)
- m_widget = gtk_hscrollbar_new( NULL );
- else
- m_widget = gtk_vscrollbar_new( NULL );
-
- m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
-
- gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed",
- (GtkSignalFunc) gtk_scrollbar_callback, (gpointer) this );
-
- PostCreation();
-
- Show( TRUE );
-
- return TRUE;
+ wxScrollEvent event(wxEVT_SCROLL_THUMBRELEASE, win->GetId(), value, orient);
+ event.SetEventObject(win);
+ win->GetEventHandler()->ProcessEvent(event);
+
+ wxScrollEvent event2(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient);
+ event2.SetEventObject(win);
+ win->GetEventHandler()->ProcessEvent(event2);
+ }
+}
}
-int wxScrollBar::GetPosition(void) const
+//-----------------------------------------------------------------------------
+// "button_release_event" from scrollbar
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static gboolean
+gtk_button_release_event(GtkRange* range, GdkEventButton*, wxScrollBar* win)
{
- return (int)(m_adjust->value+0.5);
+ if (g_isIdle)
+ wxapp_install_idle_handler();
+
+ win->m_mouseButtonDown = false;
+ // If thumb tracking
+ if (win->m_isScrolling)
+ {
+ win->m_isScrolling = false;
+ // Hook up handler to send thumb release event after this emission is finished.
+ // To allow setting scroll position from event handler, sending event must
+ // be deferred until after the GtkRange handler for this signal has run
+ g_signal_handlers_unblock_by_func(range, (void*)gtk_event_after, win);
+ }
+
+ return false;
+}
}
-int wxScrollBar::GetThumbSize() const
+//-----------------------------------------------------------------------------
+// wxScrollBar
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
+
+wxScrollBar::wxScrollBar()
{
- return (int)(m_adjust->page_size+0.5);
}
-int wxScrollBar::GetPageSize() const
+wxScrollBar::~wxScrollBar()
{
- return (int)(m_adjust->page_increment+0.5);
}
-int wxScrollBar::GetRange() const
+bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
+ const wxPoint& pos, const wxSize& size,
+ long style, const wxValidator& validator, const wxString& name )
{
- return (int)(m_adjust->upper+0.5);
+ m_needParent = true;
+ m_acceptsFocus = true;
+
+ if (!PreCreation( parent, pos, size ) ||
+ !CreateBase( parent, id, pos, size, style, validator, name ))
+ {
+ wxFAIL_MSG( wxT("wxScrollBar creation failed") );
+ return false;
+ }
+
+ const bool isVertical = (style & wxSB_VERTICAL) != 0;
+ if (isVertical)
+ m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL );
+ else
+ m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL );
+
+ m_scrollBar[int(isVertical)] = (GtkRange*)m_widget;
+
+ g_signal_connect(m_widget, "value_changed",
+ G_CALLBACK(gtk_value_changed), this);
+ g_signal_connect(m_widget, "button_press_event",
+ G_CALLBACK(gtk_button_press_event), this);
+ g_signal_connect(m_widget, "button_release_event",
+ G_CALLBACK(gtk_button_release_event), this);
+
+ gulong handler_id;
+ handler_id = g_signal_connect(
+ m_widget, "event_after", G_CALLBACK(gtk_event_after), this);
+ g_signal_handler_block(m_widget, handler_id);
+
+ m_parent->DoAddChild( this );
+
+ PostCreation(size);
+
+ return true;
}
-void wxScrollBar::SetPosition( int viewStart )
+int wxScrollBar::GetThumbPosition() const
{
- float fpos = (float)viewStart;
- 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" );
+ GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment;
+ return int(adj->value + 0.5);
}
-void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize,
- bool WXUNUSED(refresh) )
+int wxScrollBar::GetThumbSize() const
{
- float fpos = (float)position;
- m_oldPos = fpos;
- float frange = (float)range;
- float fthumb = (float)thumbSize;
- float fpage = (float)pageSize;
-
- if ((fabs(fpos-m_adjust->value) < 0.2) &&
- (fabs(frange-m_adjust->upper) < 0.2) &&
- (fabs(fthumb-m_adjust->page_size) < 0.2) &&
- (fabs(fpage-m_adjust->page_increment) < 0.2))
- return;
-
- m_adjust->lower = 0.0;
- m_adjust->upper = frange;
- m_adjust->value = fpos;
- m_adjust->step_increment = 1.0;
- m_adjust->page_increment = (float)(wxMax(fpage-2,0));
- m_adjust->page_size = fthumb;
-
- gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
+ GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment;
+ return int(adj->page_size);
}
-// Backward compatibility
-int wxScrollBar::GetValue(void) const
+int wxScrollBar::GetPageSize() const
{
- return GetPosition();
+ GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment;
+ return int(adj->page_increment);
}
-void wxScrollBar::SetValue( int viewStart )
+int wxScrollBar::GetRange() const
{
- SetPosition( viewStart );
+ GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment;
+ return int(adj->upper);
}
-void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const
+void wxScrollBar::SetThumbPosition( int viewStart )
{
- int pos = (int)(m_adjust->value+0.5);
- int thumb = (int)(m_adjust->page_size+0.5);
- int page = (int)(m_adjust->page_increment+0.5);
- int range = (int)(m_adjust->upper+0.5);
-
- *viewStart = pos;
- *viewLength = range;
- *objectLength = thumb;
- *pageLength = page;
+ if (GetThumbPosition() != viewStart)
+ {
+ GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment;
+ const int i = (GtkRange*)m_widget == m_scrollBar[1];
+ const int max = int(adj->upper - adj->page_size);
+ if (viewStart > max)
+ viewStart = max;
+ if (viewStart < 0)
+ viewStart = 0;
+
+ m_scrollPos[i] =
+ adj->value = viewStart;
+ // If a "value_changed" signal emission is not already in progress
+ if (!m_blockValueChanged[i])
+ {
+ gtk_adjustment_value_changed(adj);
+ }
+ }
}
-int wxScrollBar::GetViewLength() const
+void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize, bool)
{
- return (int)(m_adjust->upper+0.5);
+ if (range == 0)
+ {
+ // GtkRange requires upper > lower
+ range =
+ thumbSize = 1;
+ }
+ if (position > range - thumbSize)
+ position = range - thumbSize;
+ if (position < 0)
+ position = 0;
+ GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment;
+ adj->step_increment = 1;
+ adj->page_increment = pageSize;
+ adj->page_size = thumbSize;
+ adj->upper = range;
+ SetThumbPosition(position);
+ gtk_adjustment_changed(adj);
}
-int wxScrollBar::GetObjectLength() const
+void wxScrollBar::SetPageSize( int pageLength )
{
- return (int)(m_adjust->page_size+0.5);
+ SetScrollbar(GetThumbPosition(), GetThumbSize(), GetRange(), pageLength);
}
-void wxScrollBar::SetPageSize( int pageLength )
+void wxScrollBar::SetRange(int range)
{
- int pos = (int)(m_adjust->value+0.5);
- int thumb = (int)(m_adjust->page_size+0.5);
- int range = (int)(m_adjust->upper+0.5);
- SetScrollbar( pos, thumb, range, pageLength );
+ SetScrollbar(GetThumbPosition(), GetThumbSize(), range, GetPageSize());
}
-void wxScrollBar::SetObjectLength( int objectLength )
+bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
{
- int pos = (int)(m_adjust->value+0.5);
- int page = (int)(m_adjust->page_increment+0.5);
- int range = (int)(m_adjust->upper+0.5);
- SetScrollbar( pos, objectLength, range, page );
+ GtkRange *range = GTK_RANGE(m_widget);
+ return ( (window == GTK_WIDGET(range)->window) );
}
-void wxScrollBar::SetViewLength( int viewLength )
+// static
+wxVisualAttributes
+wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
- int pos = (int)(m_adjust->value+0.5);
- int thumb = (int)(m_adjust->page_size+0.5);
- int page = (int)(m_adjust->page_increment+0.5);
- SetScrollbar( pos, thumb, viewLength, page );
+ return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new);
}
+#endif // wxUSE_SCROLLBAR
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