///////////////////////////////////////////////////////////////////////////// // Name: scrolbar.cpp // Purpose: // Author: Robert Roebling // Created: 01/02/97 // Id: // Copyright: (c) 1998 Robert Roebling, Julian Smart and Markus Holzem // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifdef __GNUG__ #pragma implementation "scrolbar.h" #endif #include "wx/scrolbar.h" #include "wx/utils.h" //----------------------------------------------------------------------------- // data //----------------------------------------------------------------------------- extern bool g_blockEventsOnDrag; //----------------------------------------------------------------------------- // "value_changed" //----------------------------------------------------------------------------- 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 ); */ } //----------------------------------------------------------------------------- // "button_press_event" from slider //----------------------------------------------------------------------------- static gint gtk_scrollbar_button_press_callback( GtkRange *widget, GdkEventButton *gdk_event, wxScrollBar *win ) { if (gdk_event->window != widget->slider) return FALSE; win->m_isScrolling = TRUE; return FALSE; } //----------------------------------------------------------------------------- // "button_release_event" from slider //----------------------------------------------------------------------------- static gint gtk_scrollbar_button_release_callback( GtkRange *widget, GdkEventButton *gdk_event, wxScrollBar *win ) { if (gdk_event->window != widget->slider) return FALSE; gtk_signal_emit_by_name( GTK_OBJECT(win->m_adjust), "value_changed" ); win->m_isScrolling = FALSE; return FALSE; } //----------------------------------------------------------------------------- // wxScrollBar //----------------------------------------------------------------------------- IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl) wxScrollBar::~wxScrollBar(void) { } bool wxScrollBar::Create(wxWindow *parent, wxWindowID id, 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 & wxSB_VERTICAL == wxSB_VERTICAL) m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL ); else m_widget = gtk_vscrollbar_new( (GtkAdjustment *) 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 ); gtk_signal_connect( GTK_OBJECT(m_widget), "button_press_event", (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this ); gtk_signal_connect( GTK_OBJECT(m_widget), "button_release_event", (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this ); PostCreation(); Show( TRUE ); return TRUE; } int wxScrollBar::GetPosition(void) const { return (int)(m_adjust->value+0.5); } int wxScrollBar::GetThumbSize() const { return (int)(m_adjust->page_size+0.5); } int wxScrollBar::GetPageSize() const { return (int)(m_adjust->page_increment+0.5); } int wxScrollBar::GetRange() const { return (int)(m_adjust->upper+0.5); } void wxScrollBar::SetPosition( int viewStart ) { float fpos = (float)viewStart; m_oldPos = fpos; if (fabs(fpos-m_adjust->value) < 0.2) return; m_adjust->value = fpos; if (!m_isScrolling) gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" ); } void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize, bool WXUNUSED(refresh) ) { float fpos = (float)position; float frange = (float)range; float fthumb = (float)thumbSize; float fpage = (float)pageSize; if ((fabs(frange-m_adjust->upper) < 0.2) && (fabs(fthumb-m_adjust->page_size) < 0.2) && (fabs(fpage-m_adjust->page_increment) < 0.2)) { SetPosition( position ); return; } m_oldPos = fpos; 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" ); } // Backward compatibility int wxScrollBar::GetValue(void) const { return GetPosition(); } void wxScrollBar::SetValue( int viewStart ) { SetPosition( viewStart ); } void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const { 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; } int wxScrollBar::GetViewLength() const { return (int)(m_adjust->upper+0.5); } int wxScrollBar::GetObjectLength() const { return (int)(m_adjust->page_size+0.5); } void wxScrollBar::SetPageSize( int pageLength ) { 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 ); } void wxScrollBar::SetObjectLength( int objectLength ) { 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 ); } void wxScrollBar::SetViewLength( int viewLength ) { 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 ); } bool wxScrollBar::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) ); }