X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f96aa4d9eb296b3dfc468a351ce013bf92fab983..b7c542d5c6104aa3a52b0cafda59dff03510e888:/src/gtk/slider.cpp?ds=inline diff --git a/src/gtk/slider.cpp b/src/gtk/slider.cpp index 3c3e199010..42de025936 100644 --- a/src/gtk/slider.cpp +++ b/src/gtk/slider.cpp @@ -1,252 +1,350 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: slider.cpp +// Name: 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 +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" #include "wx/slider.h" + +#if wxUSE_SLIDER + #include "wx/utils.h" +#include "wx/math.h" +#include "wx/gtk/private.h" //----------------------------------------------------------------------------- -// data +// idle system //----------------------------------------------------------------------------- -extern bool g_blockEventsOnDrag; +extern void wxapp_install_idle_handler(); +extern bool g_isIdle; //----------------------------------------------------------------------------- -// "value_changed" +// data //----------------------------------------------------------------------------- -static void gtk_slider_callback( GtkWidget *WXUNUSED(widget), wxSlider *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 = wxVERTICAL; - - wxScrollEvent event( command, win->GetId(), value, orient ); - event.SetEventObject( win ); - win->ProcessEvent( event ); - - wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); - cevent.SetEventObject( win ); - win->ProcessEvent( cevent ); +extern bool g_blockEventsOnDrag; + +// ---------------------------------------------------------------------------- +// helper functions +// ---------------------------------------------------------------------------- + +// compare 2 adjustment values up to some (hardcoded) precision +static inline bool AreSameAdjustValues(double x, double y) +{ + return fabs(x - y) < 0.02; +} + +static inline int AdjustValueToInt(double x) +{ + // we want to round to the nearest integer, i.e. 0.9 is rounded to 1 and + // -0.9 is rounded to -1 + return (int)(x < 0 ? x - 0.5 : x + 0.5); +} + +// process a scroll event +static void +ProcessScrollEvent(wxSlider *win, wxEventType evtType, double dvalue) +{ + int orient = win->GetWindowStyleFlag() & wxSL_VERTICAL ? wxVERTICAL + : wxHORIZONTAL; + + int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5); + wxScrollEvent event( evtType, win->GetId(), value, orient ); + event.SetEventObject( win ); + win->GetEventHandler()->ProcessEvent( event ); + + if ( evtType != wxEVT_SCROLL_THUMBTRACK ) + { + wxScrollEvent event2(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient); + event2.SetEventObject( win ); + win->GetEventHandler()->ProcessEvent( event2 ); + } + + wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); + cevent.SetEventObject( win ); + cevent.SetInt( value ); + win->GetEventHandler()->ProcessEvent( cevent ); } //----------------------------------------------------------------------------- -// wxSlider +// "value_changed" //----------------------------------------------------------------------------- -IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl) +extern "C" { +static void gtk_slider_callback( GtkAdjustment *adjust, + wxSlider *win ) +{ + if (g_isIdle) wxapp_install_idle_handler(); + + if (!win->m_hasVMT) return; + if (g_blockEventsOnDrag) return; + + const double dvalue = adjust->value; + const double diff = dvalue - win->m_oldPos; + if ( AreSameAdjustValues(diff, 0) ) + return; + + wxEventType evtType; + if ( win->m_isScrolling ) + evtType = wxEVT_SCROLL_THUMBTRACK; + // it could seem that UP/DOWN are inversed but this is what wxMSW does + else if ( AreSameAdjustValues(diff, adjust->step_increment) ) + evtType = wxEVT_SCROLL_LINEDOWN; + else if ( AreSameAdjustValues(diff, -adjust->step_increment) ) + evtType = wxEVT_SCROLL_LINEUP; + else if ( AreSameAdjustValues(diff, adjust->page_increment) ) + evtType = wxEVT_SCROLL_PAGEDOWN; + else if ( AreSameAdjustValues(diff, -adjust->page_increment) ) + evtType = wxEVT_SCROLL_PAGEUP; + else if ( AreSameAdjustValues(adjust->value, adjust->lower) ) + evtType = wxEVT_SCROLL_TOP; + else if ( AreSameAdjustValues(adjust->value, adjust->upper) ) + evtType = wxEVT_SCROLL_BOTTOM; + + ProcessScrollEvent(win, evtType, dvalue); + + win->m_oldPos = dvalue; +} -wxSlider::wxSlider(void) +static gint gtk_slider_button_press_callback( GtkWidget * /* widget */, + GdkEventButton * /* gdk_event */, + wxWindowGTK *win) { + // indicate that the thumb is being dragged with the mouse + win->m_isScrolling = true; + + return FALSE; } -wxSlider::~wxSlider(void) +static gint gtk_slider_button_release_callback( GtkWidget *scale, + GdkEventButton * /* gdk_event */, + wxSlider *win) { + // not scrolling any longer + win->m_isScrolling = false; + + ProcessScrollEvent(win, wxEVT_SCROLL_THUMBRELEASE, + GTK_RANGE(scale)->adjustment->value); + + return FALSE; +} + } +//----------------------------------------------------------------------------- +// wxSlider +//----------------------------------------------------------------------------- + +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 ) { - m_needParent = TRUE; - - PreCreation( parent, id, pos, size, style, name ); - - SetValidator( validator ); - - m_oldPos = 0.0; - - if (style & wxSL_VERTICAL == wxSL_VERTICAL) - m_widget = gtk_hscale_new( (GtkAdjustment *) NULL ); - else - m_widget = gtk_vscale_new( (GtkAdjustment *) NULL ); - - m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) ); - - gtk_signal_connect (GTK_OBJECT (m_adjust), "value_changed", - (GtkSignalFunc) gtk_slider_callback, (gpointer) this ); - SetRange( minValue, maxValue ); - SetValue( value ); - - PostCreation(); - - SetBackgroundColour( parent->GetBackgroundColour() ); - - Show( TRUE ); - - return TRUE; + m_acceptsFocus = TRUE; + m_needParent = TRUE; + + if (!PreCreation( parent, pos, size ) || + !CreateBase( parent, id, pos, size, style, validator, name )) + { + wxFAIL_MSG( wxT("wxSlider creation failed") ); + return FALSE; + } + + m_oldPos = 0.0; + + if (style & wxSL_VERTICAL) + m_widget = gtk_vscale_new( (GtkAdjustment *) NULL ); + else + m_widget = gtk_hscale_new( (GtkAdjustment *) NULL ); + + if (style & wxSL_LABELS) + { + gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE ); + gtk_scale_set_digits( GTK_SCALE( m_widget ), 0 ); + + /* labels need more space and too small window will + cause junk to appear on the dialog */ + if (style & wxSL_VERTICAL) + { + wxSize sz( size ); + if (sz.x < 35) + { + sz.x = 35; + SetSize( sz ); + } + } + else + { + wxSize sz( size ); + if (sz.y < 35) + { + sz.y = 35; + SetSize( sz ); + } + } + } + else + gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE ); + + m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) ); + + if (style & wxSL_INVERSE) + gtk_range_set_inverted( GTK_RANGE(m_widget), TRUE ); + + GtkEnableEvents(); + g_signal_connect (m_widget, "button_press_event", + G_CALLBACK (gtk_slider_button_press_callback), + this); + g_signal_connect (m_widget, "button_release_event", + G_CALLBACK (gtk_slider_button_release_callback), + this); + + SetRange( minValue, maxValue ); + SetValue( value ); + + m_parent->DoAddChild( this ); + + PostCreation(size); + + return TRUE; } -int wxSlider::GetValue(void) const +int wxSlider::GetValue() const { - return (int)(m_adjust->value+0.5); + return AdjustValueToInt(m_adjust->value); } void wxSlider::SetValue( int value ) { - 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" ); + double fpos = (double)value; + m_oldPos = fpos; + if ( AreSameAdjustValues(fpos, m_adjust->value) ) + return; + + m_adjust->value = fpos; + + GtkDisableEvents(); + + g_signal_emit_by_name (m_adjust, "value_changed"); + + GtkEnableEvents(); } 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; + double fmin = (double)minValue; + double fmax = (double)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); + + GtkDisableEvents(); + + g_signal_emit_by_name (m_adjust, "changed"); - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); + GtkEnableEvents(); } -int wxSlider::GetMin(void) const +int wxSlider::GetMin() const { - return (int)(m_adjust->lower+0.5); + return (int)ceil(m_adjust->lower); } -int wxSlider::GetMax(void) const +int wxSlider::GetMax() const { - return (int)(m_adjust->upper+0.5); + return (int)ceil(m_adjust->upper); } void wxSlider::SetPageSize( int pageSize ) { - float fpage = (float)pageSize; - - if (fabs(fpage-m_adjust->page_increment) < 0.2) return; - - m_adjust->page_increment = fpage; + double fpage = (double)pageSize; - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); -} + if (fabs(fpage-m_adjust->page_increment) < 0.2) return; -int wxSlider::GetPageSize(void) const -{ - return (int)(m_adjust->page_increment+0.5); -} + m_adjust->page_increment = fpage; -void wxSlider::SetThumbLength( int len ) -{ - float flen = (float)len; - - if (fabs(flen-m_adjust->page_size) < 0.2) return; - - m_adjust->page_size = flen; + GtkDisableEvents(); - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); -} + g_signal_emit_by_name (m_adjust, "changed"); -int wxSlider::GetThumbLength(void) const -{ - return (int)(m_adjust->page_size+0.5); + GtkEnableEvents(); } -void wxSlider::SetLineSize( int WXUNUSED(lineSize) ) +int wxSlider::GetPageSize() const { + return (int)ceil(m_adjust->page_increment); } -int wxSlider::GetLineSize(void) const +void wxSlider::SetThumbLength( int len ) { - return 0; -} + double flen = (double)len; -// not supported in wxGTK (and GTK) + if (fabs(flen-m_adjust->page_size) < 0.2) return; -void wxSlider::GetSize( int *x, int *y ) const -{ - wxWindow::GetSize( x, y ); -} + m_adjust->page_size = flen; -void wxSlider::SetSize( int x, int y, int width, int height, int sizeFlags ) -{ - wxWindow::SetSize( x, y, width, height, sizeFlags ); -} + GtkDisableEvents(); -void wxSlider::GetPosition( int *x, int *y ) const -{ - wxWindow::GetPosition( x, y ); -} + g_signal_emit_by_name (m_adjust, "changed"); -void wxSlider::SetTick( int WXUNUSED(tickPos) ) -{ + GtkEnableEvents(); } -void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) ) +int wxSlider::GetThumbLength() const { + return (int)ceil(m_adjust->page_size); } -int wxSlider::GetTickFreq(void) const -{ - return 0; -} - -void wxSlider::ClearTicks(void) +void wxSlider::SetLineSize( int WXUNUSED(lineSize) ) { } -void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) ) +int wxSlider::GetLineSize() const { + return 0; } -int wxSlider::GetSelEnd(void) const +bool wxSlider::IsOwnGtkWindow( GdkWindow *window ) { - return 0; + GtkRange *range = GTK_RANGE(m_widget); + return (range->event_window == window); } -int wxSlider::GetSelStart(void) const +void wxSlider::GtkDisableEvents() { - return 0; + g_signal_handlers_disconnect_by_func (m_adjust, + (gpointer) gtk_slider_callback, + this); } -void wxSlider::ClearSel(void) +void wxSlider::GtkEnableEvents() { + g_signal_connect (m_adjust, "value_changed", + G_CALLBACK (gtk_slider_callback), this); } -bool wxSlider::IsOwnGtkWindow( GdkWindow *window ) +// static +wxVisualAttributes +wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) { - 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 GetDefaultAttributesFromGTKWidget(gtk_vscale_new); } - +#endif