X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9d522606d0a1dfd22bcdc1a386b3dca01fa985e3..bc6ca1a9e68a84817092856059d8ee9f5d109d1d:/src/gtk/slider.cpp diff --git a/src/gtk/slider.cpp b/src/gtk/slider.cpp index e7079c5c10..52e12014c7 100644 --- a/src/gtk/slider.cpp +++ b/src/gtk/slider.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: gtk/slider.cpp +// Name: src/gtk/slider.cpp // Purpose: // Author: Robert Roebling // Id: $Id$ @@ -7,72 +7,265 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#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/slider.h" -#include +#ifndef WX_PRECOMP + #include "wx/utils.h" + #include "wx/math.h" +#endif -#include "wx/gtk/private.h" +#include //----------------------------------------------------------------------------- -// idle system +// data //----------------------------------------------------------------------------- -extern void wxapp_install_idle_handler(); -extern bool g_isIdle; +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; +} //----------------------------------------------------------------------------- -// data +// "value_changed" //----------------------------------------------------------------------------- -extern bool g_blockEventsOnDrag; +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; -static const float sensitivity = 0.02; + if (!win->m_hasVMT || g_blockEventsOnDrag) + return; + + if (win->m_blockScrollEvent) + { + 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; + } +} +} //----------------------------------------------------------------------------- -// "value_changed" +// "move_slider" (keyboard event) +//----------------------------------------------------------------------------- + +extern "C" { +static void +gtk_move_slider(GtkRange*, GtkScrollType scrollType, wxSlider* win) +{ + // Save keyboard scroll type for "value_changed" handler + win->m_scrollEventType = scrollType; +} +} + +//----------------------------------------------------------------------------- +// "button_press_event" //----------------------------------------------------------------------------- -static void gtk_slider_callback( GtkAdjustment *adjust, - SCROLLBAR_CBACK_ARG - wxSlider *win ) +extern "C" { +static gboolean +gtk_button_press_event(GtkWidget*, GdkEventButton*, wxSlider* win) { - if (g_isIdle) wxapp_install_idle_handler(); + win->m_mouseButtonDown = true; - if (!win->m_hasVMT) return; - if (g_blockEventsOnDrag) return; + return false; +} +} - float diff = adjust->value - win->m_oldPos; - if (fabs(diff) < sensitivity) return; +//----------------------------------------------------------------------------- +// "event_after" +//----------------------------------------------------------------------------- - win->m_oldPos = adjust->value; +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); - wxEventType command = GtkScrollTypeToWx(GET_SCROLL_TYPE(win->m_widget)); + if (win->m_needThumbRelease) + { + win->m_needThumbRelease = false; + ProcessScrollEvent(win, wxEVT_SCROLL_THUMBRELEASE); + } + // Keep slider at an integral position + win->m_blockScrollEvent = true; + gtk_range_set_value(GTK_RANGE (win->m_widget), win->GetValue()); + win->m_blockScrollEvent = false; + } +} +} - double dvalue = adjust->value; - int value = (int)(dvalue < 0 ? dvalue - 0.5 : dvalue + 0.5); +//----------------------------------------------------------------------------- +// "button_release_event" +//----------------------------------------------------------------------------- - int orient = win->GetWindowStyleFlag() & wxSL_VERTICAL ? wxVERTICAL - : wxHORIZONTAL; +extern "C" { +static gboolean +gtk_button_release_event(GtkRange* range, GdkEventButton*, wxSlider* win) +{ + 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; +} +} - wxScrollEvent event( command, win->GetId(), value, orient ); - event.SetEventObject( win ); - win->GetEventHandler()->ProcessEvent( event ); +//----------------------------------------------------------------------------- +// "format_value" +//----------------------------------------------------------------------------- - wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); - cevent.SetEventObject( win ); - cevent.SetInt( value ); - win->GetEventHandler()->ProcessEvent( cevent ); +extern "C" { +static gchar* gtk_format_value(GtkScale*, double value, void*) +{ + // Format value as nearest integer + return g_strdup_printf("%d", wxRound(value)); +} } //----------------------------------------------------------------------------- @@ -81,209 +274,144 @@ static void gtk_slider_callback( GtkAdjustment *adjust, 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 ) +wxSlider::wxSlider() { - m_acceptsFocus = TRUE; - m_needParent = TRUE; + m_pos = 0; + m_scrollEventType = GTK_SCROLL_NONE; + m_needThumbRelease = false; + m_blockScrollEvent = false; +} + +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_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; + return false; } - m_oldPos = 0.0; - if (style & wxSL_VERTICAL) - m_widget = gtk_vscale_new( (GtkAdjustment *) NULL ); + m_widget = gtk_vscale_new( NULL ); else - m_widget = gtk_hscale_new( (GtkAdjustment *) NULL ); + m_widget = gtk_hscale_new( NULL ); + g_object_ref(m_widget); - if (style & wxSL_LABELS) - { - gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE ); - gtk_scale_set_digits( GTK_SCALE( m_widget ), 0 ); + gtk_scale_set_draw_value(GTK_SCALE (m_widget), (style & wxSL_LABELS) != 0); + // Keep full precision in position value + gtk_scale_set_digits(GTK_SCALE (m_widget), -1); - /* 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 ); + if (style & wxSL_INVERSE) + gtk_range_set_inverted( GTK_RANGE(m_widget), TRUE ); - m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) ); - - GtkEnableEvents(); + 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); + g_signal_connect(m_widget, "move_slider", G_CALLBACK(gtk_move_slider), this); + g_signal_connect(m_widget, "format_value", G_CALLBACK(gtk_format_value), NULL); + g_signal_connect(m_widget, "value_changed", G_CALLBACK(gtk_value_changed), this); + gulong handler_id = g_signal_connect(m_widget, "event_after", G_CALLBACK(gtk_event_after), this); + g_signal_handler_block(m_widget, handler_id); SetRange( minValue, maxValue ); - SetValue( value ); + + // 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; + return true; } int wxSlider::GetValue() const { - // we want to round to the nearest integer, i.e. 0.9 is rounded to 1 and - // -0.9 is rounded to -1 - double val = m_adjust->value; - return (int)(val < 0 ? val - 0.5 : val + 0.5); + return wxRound(m_pos); } 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; + if (GetValue() != value) + GTKSetValue(value); +} - GtkDisableEvents(); - - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" ); - - GtkEnableEvents(); +void wxSlider::GTKSetValue(int value) +{ + m_blockScrollEvent = true; + gtk_range_set_value(GTK_RANGE (m_widget), value); + m_blockScrollEvent = false; } 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; - m_adjust->step_increment = 1.0; - m_adjust->page_increment = ceil((fmax-fmin) / 10.0); - - GtkDisableEvents(); - - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); - - GtkEnableEvents(); + m_blockScrollEvent = true; + if (minValue == maxValue) + maxValue++; + gtk_range_set_range(GTK_RANGE (m_widget), minValue, maxValue); + gtk_range_set_increments(GTK_RANGE (m_widget), 1, (maxValue - minValue + 9) / 10); + m_blockScrollEvent = false; } int wxSlider::GetMin() const { - return (int)ceil(m_adjust->lower); + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->lower); } int wxSlider::GetMax() const { - return (int)ceil(m_adjust->upper); + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->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; - - GtkDisableEvents(); - - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); - - GtkEnableEvents(); + m_blockScrollEvent = true; + gtk_range_set_increments(GTK_RANGE (m_widget), GetLineSize(), pageSize); + m_blockScrollEvent = false; } int wxSlider::GetPageSize() const { - return (int)ceil(m_adjust->page_increment); + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->page_increment); } -void wxSlider::SetThumbLength( int len ) +// GTK does not support changing the size of the slider +void wxSlider::SetThumbLength(int) { - 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" ); - - GtkEnableEvents(); } int wxSlider::GetThumbLength() const -{ - return (int)ceil(m_adjust->page_size); -} - -void wxSlider::SetLineSize( int WXUNUSED(lineSize) ) -{ -} - -int wxSlider::GetLineSize() const { return 0; } -bool wxSlider::IsOwnGtkWindow( GdkWindow *window ) -{ - GtkRange *range = GTK_RANGE(m_widget); -#ifdef __WXGTK20__ - return (range->event_window == window); -#else - return ( (window == GTK_WIDGET(range)->window) - || (window == range->trough) - || (window == range->slider) - || (window == range->step_forw) - || (window == range->step_back) ); -#endif -} - -void wxSlider::ApplyWidgetStyle() +void wxSlider::SetLineSize( int lineSize ) { - SetWidgetStyle(); - gtk_widget_set_style( m_widget, m_widgetStyle ); + m_blockScrollEvent = true; + gtk_range_set_increments(GTK_RANGE (m_widget), lineSize, GetPageSize()); + m_blockScrollEvent = false; } -void wxSlider::GtkDisableEvents() +int wxSlider::GetLineSize() const { - gtk_signal_disconnect_by_func( GTK_OBJECT(m_adjust), - GTK_SIGNAL_FUNC(gtk_slider_callback), - (gpointer) this ); + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->step_increment); } -void wxSlider::GtkEnableEvents() +GdkWindow *wxSlider::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const { - gtk_signal_connect( GTK_OBJECT (m_adjust), - "value_changed", - GTK_SIGNAL_FUNC(gtk_slider_callback), - (gpointer) this ); + return GTK_RANGE(m_widget)->event_window; } // static @@ -293,4 +421,4 @@ wxSlider::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) return GetDefaultAttributesFromGTKWidget(gtk_vscale_new); } -#endif +#endif // wxUSE_SLIDER