X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6de97a3b945c99fb942209df48be26f43c1b436d..8a31648287be0ef976f133de2786b137f1e98340:/src/gtk/scrolbar.cpp diff --git a/src/gtk/scrolbar.cpp b/src/gtk/scrolbar.cpp index ab1482b006..2ef064b3fa 100644 --- a/src/gtk/scrolbar.cpp +++ b/src/gtk/scrolbar.cpp @@ -1,211 +1,241 @@ ///////////////////////////////////////////////////////////////////////////// -// 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" + +#ifndef WX_PRECOMP + #include "wx/utils.h" +#endif + +#include "wx/gtk/private.h" //----------------------------------------------------------------------------- -// data +// "value_changed" from scrollbar //----------------------------------------------------------------------------- -extern bool g_blockEventsOnDrag; +extern "C" { +static void +gtk_value_changed(GtkRange* range, wxScrollBar* win) +{ + wxEventType eventType = win->GTKGetScrollEventType(range); + if (eventType != wxEVT_NULL) + { + const int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL; + const int value = win->GetThumbPosition(); + const int id = win->GetId(); + + // first send the specific event for the user action + wxScrollEvent evtSpec(eventType, id, value, orient); + evtSpec.SetEventObject(win); + win->HandleWindowEvent(evtSpec); + + if (!win->m_isScrolling) + { + // and if it's over also send a general "changed" event + wxScrollEvent evtChanged(wxEVT_SCROLL_CHANGED, id, value, orient); + evtChanged.SetEventObject(win); + win->HandleWindowEvent(evtChanged); + } + } +} +} //----------------------------------------------------------------------------- -// wxScrollBar +// "button_press_event" 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 ); -*/ -} - -IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl) - -wxScrollBar::~wxScrollBar(void) +extern "C" { +static gboolean +gtk_button_press_event(GtkRange*, GdkEventButton*, wxScrollBar* win) { + 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; + const int id = win->GetId(); - 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 evtRel(wxEVT_SCROLL_THUMBRELEASE, id, value, orient); + evtRel.SetEventObject(win); + win->HandleWindowEvent(evtRel); -int wxScrollBar::GetPosition(void) const -{ - return (int)(m_adjust->value+0.5); + wxScrollEvent evtChanged(wxEVT_SCROLL_CHANGED, id, value, orient); + evtChanged.SetEventObject(win); + win->HandleWindowEvent(evtChanged); + } +} } -int wxScrollBar::GetThumbSize() const +//----------------------------------------------------------------------------- +// "button_release_event" from scrollbar +//----------------------------------------------------------------------------- + +extern "C" { +static gboolean +gtk_button_release_event(GtkRange* range, GdkEventButton*, wxScrollBar* win) { - return (int)(m_adjust->page_size+0.5); + 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::GetPageSize() const +//----------------------------------------------------------------------------- +// wxScrollBar +//----------------------------------------------------------------------------- + +wxScrollBar::wxScrollBar() { - return (int)(m_adjust->page_increment+0.5); } -int wxScrollBar::GetRange() const +wxScrollBar::~wxScrollBar() { - return (int)(m_adjust->upper+0.5); } -void wxScrollBar::SetPosition( int viewStart ) +bool wxScrollBar::Create(wxWindow *parent, wxWindowID id, + const wxPoint& pos, const wxSize& size, + long style, const wxValidator& validator, const wxString& name ) { - 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" ); + 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( NULL ); + else + m_widget = gtk_hscrollbar_new( NULL ); + g_object_ref(m_widget); + + m_scrollBar[0] = (GtkRange*)m_widget; + + g_signal_connect_after(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::SetScrollbar( int position, int thumbSize, int range, int pageSize, - bool WXUNUSED(refresh) ) +int wxScrollBar::GetThumbPosition() 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" ); + return wxRound(gtk_range_get_value(GTK_RANGE(m_widget))); } -// Backward compatibility -int wxScrollBar::GetValue(void) const +int wxScrollBar::GetThumbSize() const { - return GetPosition(); + GtkAdjustment* adj = gtk_range_get_adjustment(GTK_RANGE(m_widget)); + return int(gtk_adjustment_get_page_size(adj)); } -void wxScrollBar::SetValue( int viewStart ) +int wxScrollBar::GetPageSize() const { - SetPosition( viewStart ); + GtkAdjustment* adj = gtk_range_get_adjustment(GTK_RANGE(m_widget)); + return int(gtk_adjustment_get_page_increment(adj)); } -void wxScrollBar::GetValues( int *viewStart, int *viewLength, int *objectLength, int *pageLength ) const +int wxScrollBar::GetRange() 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; + GtkAdjustment* adj = gtk_range_get_adjustment(GTK_RANGE(m_widget)); + return int(gtk_adjustment_get_upper(adj)); } -int wxScrollBar::GetViewLength() const +void wxScrollBar::SetThumbPosition( int viewStart ) { - return (int)(m_adjust->upper+0.5); + if (GetThumbPosition() != viewStart) + { + g_signal_handlers_block_by_func(m_widget, + (gpointer)gtk_value_changed, this); + + gtk_range_set_value((GtkRange*)m_widget, viewStart); + m_scrollPos[0] = gtk_range_get_value((GtkRange*)m_widget); + + g_signal_handlers_unblock_by_func(m_widget, + (gpointer)gtk_value_changed, this); + } } -int wxScrollBar::GetObjectLength() const +void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize, bool) { - return (int)(m_adjust->page_size+0.5); + if (range == 0) + { + // GtkRange requires upper > lower + range = + thumbSize = 1; + } + g_signal_handlers_block_by_func(m_widget, (void*)gtk_value_changed, this); + GtkRange* widget = GTK_RANGE(m_widget); + gtk_adjustment_set_page_size(gtk_range_get_adjustment(widget), thumbSize); + gtk_range_set_increments(widget, 1, pageSize); + gtk_range_set_range(widget, 0, range); + gtk_range_set_value(widget, position); + m_scrollPos[0] = gtk_range_get_value(widget); + g_signal_handlers_unblock_by_func(m_widget, (void*)gtk_value_changed, this); } 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 ); + SetScrollbar(GetThumbPosition(), GetThumbSize(), GetRange(), pageLength); } -void wxScrollBar::SetObjectLength( int objectLength ) +void wxScrollBar::SetRange(int range) { - 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 ); + SetScrollbar(GetThumbPosition(), GetThumbSize(), range, GetPageSize()); } -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