X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b292e2f512fa9b25e2d2928604ab884b00e6c6bf..d6a658ff0cd928953efdaf1ea56ff04b9cf281c1:/src/gtk/slider.cpp?ds=sidebyside diff --git a/src/gtk/slider.cpp b/src/gtk/slider.cpp index d45eda3add..83deaec5f3 100644 --- a/src/gtk/slider.cpp +++ b/src/gtk/slider.cpp @@ -1,248 +1,530 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: slider.cpp +// Name: src/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" + +#if wxUSE_SLIDER #include "wx/slider.h" -#include "wx/utils.h" -#include + +#ifndef WX_PRECOMP + #include "wx/utils.h" + #include "wx/math.h" +#endif + +#include //----------------------------------------------------------------------------- // data //----------------------------------------------------------------------------- -extern bool g_blockEventsOnDrag; +extern bool g_blockEventsOnDrag; + +// ---------------------------------------------------------------------------- +// helper functions +// ---------------------------------------------------------------------------- + +// process a scroll event +static void +ProcessScrollEvent(wxSlider *win, wxEventType evtType) +{ + const int orient = win->HasFlag(wxSL_VERTICAL) ? wxVERTICAL + : wxHORIZONTAL; + + const int value = win->GetValue(); + + // if we have any "special" event (i.e. the value changed by a line or a + // page), send this specific event first + if ( evtType != wxEVT_NULL ) + { + wxScrollEvent event( evtType, win->GetId(), value, orient ); + event.SetEventObject( win ); + win->HandleWindowEvent( event ); + } + + // but, in any case, except if we're dragging the slider (and so the change + // is not definitive), send a generic "changed" event + if ( evtType != wxEVT_SCROLL_THUMBTRACK ) + { + wxScrollEvent event(wxEVT_SCROLL_CHANGED, win->GetId(), value, orient); + event.SetEventObject( win ); + win->HandleWindowEvent( event ); + } + + // and also generate a command event for compatibility + wxCommandEvent event( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); + event.SetEventObject( win ); + event.SetInt( value ); + win->HandleWindowEvent( event ); +} + +static inline wxEventType GtkScrollTypeToWx(int scrollType) +{ + wxEventType eventType; + switch (scrollType) + { + case GTK_SCROLL_STEP_BACKWARD: + case GTK_SCROLL_STEP_LEFT: + case GTK_SCROLL_STEP_UP: + eventType = wxEVT_SCROLL_LINEUP; + break; + case GTK_SCROLL_STEP_DOWN: + case GTK_SCROLL_STEP_FORWARD: + case GTK_SCROLL_STEP_RIGHT: + eventType = wxEVT_SCROLL_LINEDOWN; + break; + case GTK_SCROLL_PAGE_BACKWARD: + case GTK_SCROLL_PAGE_LEFT: + case GTK_SCROLL_PAGE_UP: + eventType = wxEVT_SCROLL_PAGEUP; + break; + case GTK_SCROLL_PAGE_DOWN: + case GTK_SCROLL_PAGE_FORWARD: + case GTK_SCROLL_PAGE_RIGHT: + eventType = wxEVT_SCROLL_PAGEDOWN; + break; + case GTK_SCROLL_START: + eventType = wxEVT_SCROLL_TOP; + break; + case GTK_SCROLL_END: + eventType = wxEVT_SCROLL_BOTTOM; + break; + case GTK_SCROLL_JUMP: + eventType = wxEVT_SCROLL_THUMBTRACK; + break; + default: + wxFAIL_MSG(wxT("Unknown GtkScrollType")); + eventType = wxEVT_NULL; + break; + } + return eventType; +} + +// Determine if increment is the same as +/-x, allowing for some small +// difference due to possible inexactness in floating point arithmetic +static inline bool IsScrollIncrement(double increment, double x) +{ + wxASSERT(increment > 0); + const double tolerance = 1.0 / 1024; + return fabs(increment - fabs(x)) < tolerance; +} //----------------------------------------------------------------------------- // "value_changed" //----------------------------------------------------------------------------- -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(win->m_adjust->value-win->m_adjust->lower) < 0.2) command = wxEVT_SCROLL_BOTTOM; - else if (fabs(win->m_adjust->value-win->m_adjust->upper) < 0.2) command = wxEVT_SCROLL_TOP; - else 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 "C" { +static void +gtk_value_changed(GtkRange* range, wxSlider* win) +{ + GtkAdjustment* adj = gtk_range_get_adjustment (range); + const int pos = wxRound(adj->value); + const double oldPos = win->m_pos; + win->m_pos = adj->value; + + if (!win->m_hasVMT || g_blockEventsOnDrag) + return; + + if (win->GTKEventsDisabled()) + { + win->m_scrollEventType = GTK_SCROLL_NONE; + return; + } + + wxEventType eventType = wxEVT_NULL; + if (win->m_isScrolling) + { + eventType = wxEVT_SCROLL_THUMBTRACK; + } + else if (win->m_scrollEventType != GTK_SCROLL_NONE) + { + // Scroll event from "move-slider" (keyboard) + eventType = GtkScrollTypeToWx(win->m_scrollEventType); + } + else if (win->m_mouseButtonDown) + { + // Difference from last change event + const double diff = adj->value - oldPos; + const bool isDown = diff > 0; + + if (IsScrollIncrement(adj->page_increment, diff)) + { + eventType = isDown ? wxEVT_SCROLL_PAGEDOWN : wxEVT_SCROLL_PAGEUP; + } + else if (wxIsSameDouble(adj->value, 0)) + { + eventType = wxEVT_SCROLL_PAGEUP; + } + else if (wxIsSameDouble(adj->value, adj->upper)) + { + eventType = wxEVT_SCROLL_PAGEDOWN; + } + else + { + // Assume track event + eventType = wxEVT_SCROLL_THUMBTRACK; + // Remember that we're tracking + win->m_isScrolling = true; + } + } + + win->m_scrollEventType = GTK_SCROLL_NONE; + + // If integral position has changed + if (wxRound(oldPos) != pos) + { + ProcessScrollEvent(win, eventType); + win->m_needThumbRelease = eventType == wxEVT_SCROLL_THUMBTRACK; + } +} } //----------------------------------------------------------------------------- -// wxSlider +// "move_slider" (keyboard event) //----------------------------------------------------------------------------- -IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl) - -wxSlider::wxSlider(void) +extern "C" { +static void +gtk_move_slider(GtkRange*, GtkScrollType scrollType, wxSlider* win) { + // Save keyboard scroll type for "value_changed" handler + win->m_scrollEventType = scrollType; } - -wxSlider::~wxSlider(void) -{ } -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_acceptsFocus = TRUE; - m_needParent = TRUE; - - PreCreation( parent, id, pos, size, style, name ); - - SetValidator( validator ); +//----------------------------------------------------------------------------- +// "button_press_event" +//----------------------------------------------------------------------------- - m_oldPos = 0.0; +extern "C" { +static gboolean +gtk_button_press_event(GtkWidget*, GdkEventButton*, wxSlider* win) +{ + win->m_mouseButtonDown = true; - if (style & wxSL_VERTICAL == wxSL_VERTICAL) - m_widget = gtk_hscale_new( (GtkAdjustment *) NULL ); - else - m_widget = gtk_vscale_new( (GtkAdjustment *) NULL ); - - gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE ); - - 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 ); - - m_parent->AddChild( this ); + return false; +} +} - (m_parent->m_insertCallback)( m_parent, this ); - - PostCreation(); - - SetBackgroundColour( parent->GetBackgroundColour() ); +//----------------------------------------------------------------------------- +// "event_after" +//----------------------------------------------------------------------------- - Show( TRUE ); - - return TRUE; +extern "C" { +static void +gtk_event_after(GtkRange* range, GdkEvent* event, wxSlider* win) +{ + if (event->type == GDK_BUTTON_RELEASE) + { + g_signal_handlers_block_by_func(range, (gpointer) gtk_event_after, win); + + if (win->m_needThumbRelease) + { + win->m_needThumbRelease = false; + ProcessScrollEvent(win, wxEVT_SCROLL_THUMBRELEASE); + } + // Keep slider at an integral position + win->GTKDisableEvents(); + gtk_range_set_value(GTK_RANGE (win->m_scale), win->GetValue()); + win->GTKEnableEvents(); + } +} } -int wxSlider::GetValue(void) const +//----------------------------------------------------------------------------- +// "button_release_event" +//----------------------------------------------------------------------------- + +extern "C" { +static gboolean +gtk_button_release_event(GtkRange* range, GdkEventButton*, wxSlider* win) { - return (int)(m_adjust->value+0.5); + win->m_mouseButtonDown = false; + if (win->m_isScrolling) + { + win->m_isScrolling = false; + g_signal_handlers_unblock_by_func(range, (gpointer) gtk_event_after, win); + } + return false; +} } -void wxSlider::SetValue( int value ) +//----------------------------------------------------------------------------- +// "format_value" +//----------------------------------------------------------------------------- + +extern "C" { +static gchar* gtk_format_value(GtkScale*, double value, void*) { - 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" ); + // Format value as nearest integer + return g_strdup_printf("%d", wxRound(value)); +} } -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; +//----------------------------------------------------------------------------- +// wxSlider +//----------------------------------------------------------------------------- - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); -} +IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl) -int wxSlider::GetMin(void) const +wxSlider::wxSlider() { - return (int)(m_adjust->lower+0.5); + m_pos = 0; + m_scrollEventType = GTK_SCROLL_NONE; + m_needThumbRelease = false; + m_blockScrollEvent = false; } -int wxSlider::GetMax(void) const +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) { - return (int)(m_adjust->upper+0.5); + m_pos = value; + m_scrollEventType = GTK_SCROLL_NONE; + + if (!PreCreation( parent, pos, size ) || + !CreateBase( parent, id, pos, size, style, validator, name )) + { + wxFAIL_MSG( wxT("wxSlider creation failed") ); + return false; + } + + + if (style & wxSL_VERTICAL) + m_scale = gtk_vscale_new( NULL ); + else + m_scale = gtk_hscale_new( NULL ); + g_object_ref(m_scale); + + if (style & wxSL_MIN_MAX_LABELS) + { + gtk_widget_show( m_scale ); + + if (style & wxSL_VERTICAL) + m_widget = gtk_hbox_new(false, 0); + else + m_widget = gtk_vbox_new(false, 0); + g_object_ref(m_widget); + gtk_widget_show( m_widget ); + gtk_container_add( GTK_CONTAINER(m_widget), m_scale ); + + GtkWidget *box; + if (style & wxSL_VERTICAL) + box = gtk_vbox_new(false,0); + else + box = gtk_hbox_new(false,0); + g_object_ref(box); + gtk_widget_show(box); + gtk_container_add( GTK_CONTAINER(m_widget), box ); + + m_minLabel = gtk_label_new(NULL); + g_object_ref(m_minLabel); + gtk_widget_show( m_minLabel ); + gtk_container_add( GTK_CONTAINER(box), m_minLabel ); + gtk_box_set_child_packing( GTK_BOX(box), m_minLabel, FALSE, FALSE, 0, GTK_PACK_START ); + + // expanding empty space between the min/max labels + GtkWidget *space = gtk_label_new(NULL); + g_object_ref(space); + gtk_widget_show( space ); + gtk_container_add( GTK_CONTAINER(box), space ); + gtk_box_set_child_packing( GTK_BOX(box), space, TRUE, FALSE, 0, GTK_PACK_START ); + + m_maxLabel = gtk_label_new(NULL); + g_object_ref(m_maxLabel); + gtk_widget_show( m_maxLabel ); + gtk_container_add( GTK_CONTAINER(box), m_maxLabel ); + gtk_box_set_child_packing( GTK_BOX(box), m_maxLabel, FALSE, FALSE, 0, GTK_PACK_END ); + } + else + { + m_widget = m_scale; + m_maxLabel = NULL; + m_minLabel = NULL; + } + + const bool showValueLabel = (style & wxSL_VALUE_LABEL) != 0; + gtk_scale_set_draw_value(GTK_SCALE (m_scale), showValueLabel ); + if ( showValueLabel ) + { + // position the label appropriately: notice that wxSL_DIRECTION flags + // specify the position of the ticks, not label, under MSW and so the + // label is on the opposite side + GtkPositionType posLabel; + if ( style & wxSL_VERTICAL ) + { + if ( style & wxSL_LEFT ) + posLabel = GTK_POS_RIGHT; + else // if ( style & wxSL_RIGHT ) -- this is also the default + posLabel = GTK_POS_LEFT; + } + else // horizontal slider + { + if ( style & wxSL_TOP ) + posLabel = GTK_POS_BOTTOM; + else // if ( style & wxSL_BOTTOM) -- this is again the default + posLabel = GTK_POS_TOP; + } + + gtk_scale_set_value_pos( GTK_SCALE(m_scale), posLabel ); + } + + // Keep full precision in position value + gtk_scale_set_digits(GTK_SCALE (m_scale), -1); + + if (style & wxSL_INVERSE) + gtk_range_set_inverted( GTK_RANGE(m_scale), TRUE ); + + g_signal_connect(m_scale, "button_press_event", G_CALLBACK(gtk_button_press_event), this); + g_signal_connect(m_scale, "button_release_event", G_CALLBACK(gtk_button_release_event), this); + g_signal_connect(m_scale, "move_slider", G_CALLBACK(gtk_move_slider), this); + g_signal_connect(m_scale, "format_value", G_CALLBACK(gtk_format_value), NULL); + g_signal_connect(m_scale, "value_changed", G_CALLBACK(gtk_value_changed), this); + gulong handler_id = g_signal_connect(m_scale, "event_after", G_CALLBACK(gtk_event_after), this); + g_signal_handler_block(m_scale, handler_id); + + SetRange( minValue, maxValue ); + + // don't call the public SetValue() as it won't do anything unless the + // value really changed + GTKSetValue( value ); + + m_parent->DoAddChild( this ); + + PostCreation(size); + + return true; } -void wxSlider::SetPageSize( int pageSize ) +void wxSlider::GTKDisableEvents() { - float fpage = (float)pageSize; - - if (fabs(fpage-m_adjust->page_increment) < 0.2) return; - - m_adjust->page_increment = fpage; - - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); + m_blockScrollEvent = true; } -int wxSlider::GetPageSize(void) const +void wxSlider::GTKEnableEvents() { - return (int)(m_adjust->page_increment+0.5); + m_blockScrollEvent = false; } -void wxSlider::SetThumbLength( int len ) +bool wxSlider::GTKEventsDisabled() const { - float flen = (float)len; - - if (fabs(flen-m_adjust->page_size) < 0.2) return; - - m_adjust->page_size = flen; + return m_blockScrollEvent; +} - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); +int wxSlider::GetValue() const +{ + return wxRound(m_pos); } -int wxSlider::GetThumbLength(void) const +void wxSlider::SetValue( int value ) { - return (int)(m_adjust->page_size+0.5); + if (GetValue() != value) + GTKSetValue(value); } -void wxSlider::SetLineSize( int WXUNUSED(lineSize) ) +void wxSlider::GTKSetValue(int value) { + GTKDisableEvents(); + gtk_range_set_value(GTK_RANGE (m_scale), value); + GTKEnableEvents(); } -int wxSlider::GetLineSize(void) const +void wxSlider::SetRange( int minValue, int maxValue ) { - return 0; + GTKDisableEvents(); + if (minValue == maxValue) + maxValue++; + gtk_range_set_range(GTK_RANGE (m_scale), minValue, maxValue); + gtk_range_set_increments(GTK_RANGE (m_scale), 1, (maxValue - minValue + 9) / 10); + GTKEnableEvents(); + + if (HasFlag(wxSL_MIN_MAX_LABELS)) + { + wxString str; + + str.Printf( "%d", minValue ); + if (HasFlag(wxSL_INVERSE)) + gtk_label_set_text( GTK_LABEL(m_maxLabel), str.utf8_str() ); + else + gtk_label_set_text( GTK_LABEL(m_minLabel), str.utf8_str() ); + + str.Printf( "%d", maxValue ); + if (HasFlag(wxSL_INVERSE)) + gtk_label_set_text( GTK_LABEL(m_minLabel), str.utf8_str() ); + else + gtk_label_set_text( GTK_LABEL(m_maxLabel), str.utf8_str() ); + + } } -void wxSlider::SetTick( int WXUNUSED(tickPos) ) +int wxSlider::GetMin() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->lower); } -void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) ) +int wxSlider::GetMax() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->upper); } -int wxSlider::GetTickFreq(void) const +void wxSlider::SetPageSize( int pageSize ) { - return 0; + GTKDisableEvents(); + gtk_range_set_increments(GTK_RANGE (m_scale), GetLineSize(), pageSize); + GTKEnableEvents(); } -void wxSlider::ClearTicks(void) +int wxSlider::GetPageSize() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->page_increment); } -void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) ) +// GTK does not support changing the size of the slider +void wxSlider::SetThumbLength(int) { } -int wxSlider::GetSelEnd(void) const +int wxSlider::GetThumbLength() const { - return 0; + return 0; } -int wxSlider::GetSelStart(void) const +void wxSlider::SetLineSize( int lineSize ) { - return 0; + GTKDisableEvents(); + gtk_range_set_increments(GTK_RANGE (m_scale), lineSize, GetPageSize()); + GTKEnableEvents(); } -void wxSlider::ClearSel(void) +int wxSlider::GetLineSize() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_scale))->step_increment); } -bool wxSlider::IsOwnGtkWindow( GdkWindow *window ) +GdkWindow *wxSlider::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const { - 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 GTK_RANGE(m_scale)->event_window; } -void wxSlider::ApplyWidgetStyle() +// static +wxVisualAttributes +wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) { - SetWidgetStyle(); - gtk_widget_set_style( m_widget, m_widgetStyle ); + return GetDefaultAttributesFromGTKWidget(gtk_vscale_new); } + +#endif // wxUSE_SLIDER