9d522606d0
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27115 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
347 lines
9.6 KiB
C++
347 lines
9.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/gtk/scrolbar.cpp
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// Purpose:
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// Author: Robert Roebling
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// Id: $Id$
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// Copyright: (c) 1998 Robert Roebling
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
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#pragma implementation "scrolbar.h"
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#endif
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#if wxUSE_SCROLLBAR
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#include "wx/scrolbar.h"
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#include "wx/utils.h"
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#include <math.h>
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#include "wx/gtk/private.h"
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//-----------------------------------------------------------------------------
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// idle system
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//-----------------------------------------------------------------------------
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extern void wxapp_install_idle_handler();
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extern bool g_isIdle;
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//-----------------------------------------------------------------------------
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// data
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//-----------------------------------------------------------------------------
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extern bool g_blockEventsOnDrag;
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extern bool g_blockEventsOnScroll;
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static const float sensitivity = 0.02;
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//-----------------------------------------------------------------------------
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// "value_changed"
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//-----------------------------------------------------------------------------
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// FIXME: is GtkScrollType really passed to us as 2nd argument?
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static void gtk_scrollbar_callback( GtkAdjustment *adjust,
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SCROLLBAR_CBACK_ARG
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wxScrollBar *win )
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{
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if (g_isIdle) wxapp_install_idle_handler();
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if (!win->m_hasVMT) return;
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if (g_blockEventsOnDrag) return;
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float diff = adjust->value - win->m_oldPos;
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if (fabs(diff) < sensitivity) return;
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win->m_oldPos = adjust->value;
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wxEventType command = GtkScrollTypeToWx(GET_SCROLL_TYPE(win->m_widget));
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double dvalue = adjust->value;
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int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5);
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int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
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wxScrollEvent event( command, win->GetId(), value, orient );
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event.SetEventObject( win );
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win->GetEventHandler()->ProcessEvent( event );
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/*
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wxCommandEvent cevent( wxEVT_COMMAND_SCROLLBAR_UPDATED, win->GetId() );
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cevent.SetEventObject( win );
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win->ProcessEvent( cevent );
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*/
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}
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//-----------------------------------------------------------------------------
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// "button_press_event" from slider
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//-----------------------------------------------------------------------------
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static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
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GdkEventButton *gdk_event,
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wxScrollBar *win )
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{
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if (g_isIdle) wxapp_install_idle_handler();
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// g_blockEventsOnScroll = TRUE; doesn't work in DialogEd
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// FIXME: there is no slider field any more, what was meant here?
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#ifndef __WXGTK20__
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win->m_isScrolling = (gdk_event->window == widget->slider);
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#endif
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return FALSE;
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}
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//-----------------------------------------------------------------------------
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// "button_release_event" from slider
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//-----------------------------------------------------------------------------
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static gint
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gtk_scrollbar_button_release_callback( GtkRange *WXUNUSED(widget),
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GdkEventButton *WXUNUSED(gdk_event),
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wxScrollBar *win )
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{
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if (g_isIdle)
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wxapp_install_idle_handler();
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// g_blockEventsOnScroll = FALSE;
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if (win->m_isScrolling)
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{
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wxEventType command = wxEVT_SCROLL_THUMBRELEASE;
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int value = (int)ceil(win->m_adjust->value);
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int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL;
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wxScrollEvent event( command, win->GetId(), value, orient );
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event.SetEventObject( win );
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win->GetEventHandler()->ProcessEvent( event );
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}
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win->m_isScrolling = FALSE;
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return FALSE;
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}
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//-----------------------------------------------------------------------------
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// wxScrollBar
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl)
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wxScrollBar::~wxScrollBar()
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{
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}
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bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
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const wxPoint& pos, const wxSize& size,
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long style, const wxValidator& validator, const wxString& name )
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{
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m_needParent = TRUE;
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m_acceptsFocus = TRUE;
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if (!PreCreation( parent, pos, size ) ||
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!CreateBase( parent, id, pos, size, style, validator, name ))
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{
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wxFAIL_MSG( wxT("wxScrollBar creation failed") );
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return FALSE;
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}
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m_oldPos = 0.0;
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if ((style & wxSB_VERTICAL) == wxSB_VERTICAL)
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m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL );
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else
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m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL );
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m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) );
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gtk_signal_connect( GTK_OBJECT(m_adjust),
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"value_changed",
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(GtkSignalFunc) gtk_scrollbar_callback,
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(gpointer) this );
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gtk_signal_connect( GTK_OBJECT(m_widget),
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"button_press_event",
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(GtkSignalFunc)gtk_scrollbar_button_press_callback,
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(gpointer) this );
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gtk_signal_connect( GTK_OBJECT(m_widget),
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"button_release_event",
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(GtkSignalFunc)gtk_scrollbar_button_release_callback,
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(gpointer) this );
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m_parent->DoAddChild( this );
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PostCreation(size);
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return TRUE;
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}
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int wxScrollBar::GetThumbPosition() const
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{
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double val = m_adjust->value;
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return (int)(val < 0 ? val - 0.5 : val + 0.5);
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}
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int wxScrollBar::GetThumbSize() const
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{
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return (int)(m_adjust->page_size+0.5);
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}
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int wxScrollBar::GetPageSize() const
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{
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return (int)(m_adjust->page_increment+0.5);
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}
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int wxScrollBar::GetRange() const
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{
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return (int)(m_adjust->upper+0.5);
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}
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void wxScrollBar::SetThumbPosition( int viewStart )
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{
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if (m_isScrolling) return;
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float fpos = (float)viewStart;
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m_oldPos = fpos;
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if (fabs(fpos-m_adjust->value) < 0.2) return;
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m_adjust->value = fpos;
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gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust),
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(GtkSignalFunc) gtk_scrollbar_callback,
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(gpointer) this );
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gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" );
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gtk_signal_connect( GTK_OBJECT(m_adjust),
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"value_changed",
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(GtkSignalFunc) gtk_scrollbar_callback,
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(gpointer) this );
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}
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void wxScrollBar::SetScrollbar( int position, int thumbSize, int range, int pageSize,
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bool WXUNUSED(refresh) )
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{
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float fpos = (float)position;
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float frange = (float)range;
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float fthumb = (float)thumbSize;
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float fpage = (float)pageSize;
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if ((fabs(frange-m_adjust->upper) < 0.2) &&
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(fabs(fthumb-m_adjust->page_size) < 0.2) &&
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(fabs(fpage-m_adjust->page_increment) < 0.2))
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{
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SetThumbPosition( position );
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return;
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}
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m_oldPos = fpos;
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m_adjust->lower = 0.0;
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m_adjust->upper = frange;
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m_adjust->value = fpos;
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m_adjust->step_increment = 1.0;
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m_adjust->page_increment = (float)(wxMax(fpage,0));
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m_adjust->page_size = fthumb;
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gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" );
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}
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/* Backward compatibility */
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int wxScrollBar::GetValue() const
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{
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return GetThumbPosition();
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}
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void wxScrollBar::SetValue( int viewStart )
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{
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SetThumbPosition( viewStart );
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}
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void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const
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{
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int pos = (int)(m_adjust->value+0.5);
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int thumb = (int)(m_adjust->page_size+0.5);
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int page = (int)(m_adjust->page_increment+0.5);
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int range = (int)(m_adjust->upper+0.5);
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*viewStart = pos;
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*viewLength = range;
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*objectLength = thumb;
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*pageLength = page;
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}
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int wxScrollBar::GetViewLength() const
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{
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return (int)(m_adjust->upper+0.5);
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}
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int wxScrollBar::GetObjectLength() const
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{
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return (int)(m_adjust->page_size+0.5);
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}
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void wxScrollBar::SetPageSize( int pageLength )
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{
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int pos = (int)(m_adjust->value+0.5);
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int thumb = (int)(m_adjust->page_size+0.5);
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int range = (int)(m_adjust->upper+0.5);
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SetScrollbar( pos, thumb, range, pageLength );
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}
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void wxScrollBar::SetObjectLength( int objectLength )
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{
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int pos = (int)(m_adjust->value+0.5);
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int page = (int)(m_adjust->page_increment+0.5);
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int range = (int)(m_adjust->upper+0.5);
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SetScrollbar( pos, objectLength, range, page );
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}
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void wxScrollBar::SetViewLength( int viewLength )
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{
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int pos = (int)(m_adjust->value+0.5);
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int thumb = (int)(m_adjust->page_size+0.5);
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int page = (int)(m_adjust->page_increment+0.5);
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SetScrollbar( pos, thumb, viewLength, page );
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}
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bool wxScrollBar::IsOwnGtkWindow( GdkWindow *window )
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{
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GtkRange *range = GTK_RANGE(m_widget);
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return ( (window == GTK_WIDGET(range)->window)
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#ifndef __WXGTK20__
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|| (window == range->trough)
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|| (window == range->slider)
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|| (window == range->step_forw)
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|| (window == range->step_back)
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#endif // GTK+ 1.x
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);
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}
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void wxScrollBar::ApplyWidgetStyle()
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{
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SetWidgetStyle();
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gtk_widget_set_style( m_widget, m_widgetStyle );
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}
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wxSize wxScrollBar::DoGetBestSize() const
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{
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return wxControl::DoGetBestSize();
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}
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// static
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wxVisualAttributes
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wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
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{
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return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new);
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}
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#endif
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