X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ef7a25a73ef4215454d6d8e3bad63bdf5b4339a0..3201a1046ba71ba8e5ef2ed694fde34d12f743f3:/src/gtk/slider.cpp?ds=sidebyside diff --git a/src/gtk/slider.cpp b/src/gtk/slider.cpp index 58aa39db81..f14ae6394a 100644 --- a/src/gtk/slider.cpp +++ b/src/gtk/slider.cpp @@ -1,298 +1,423 @@ ///////////////////////////////////////////////////////////////////////////// -// 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 - -#include "wx/slider.h" +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.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 #include -//----------------------------------------------------------------------------- -// idle system -//----------------------------------------------------------------------------- - -extern void wxapp_install_idle_handler(); -extern bool g_isIdle; - //----------------------------------------------------------------------------- // data //----------------------------------------------------------------------------- -extern bool g_blockEventsOnDrag; +extern bool g_blockEventsOnDrag; -static const float sensitivity = 0.02; +// ---------------------------------------------------------------------------- +// helper functions +// ---------------------------------------------------------------------------- -//----------------------------------------------------------------------------- -// "value_changed" -//----------------------------------------------------------------------------- - -static void gtk_slider_callback( GtkAdjustment *adjust, wxSlider *win ) +// process a scroll event +static void +ProcessScrollEvent(wxSlider *win, wxEventType evtType) { - if (g_isIdle) wxapp_install_idle_handler(); - - if (!win->m_hasVMT) return; - if (g_blockEventsOnDrag) return; + const int orient = win->HasFlag(wxSL_VERTICAL) ? wxVERTICAL + : wxHORIZONTAL; - float diff = adjust->value - win->m_oldPos; - if (fabs(diff) < sensitivity) return; + const int value = win->GetValue(); - win->m_oldPos = adjust->value; - - GtkRange *range = GTK_RANGE( win->m_widget ); - - wxEventType command = wxEVT_SCROLL_THUMBTRACK; - if (range->scroll_type == GTK_SCROLL_STEP_BACKWARD) command = wxEVT_SCROLL_LINEUP; - else if (range->scroll_type == GTK_SCROLL_STEP_FORWARD) command = wxEVT_SCROLL_LINEDOWN; - else if (range->scroll_type == GTK_SCROLL_PAGE_BACKWARD) command = wxEVT_SCROLL_PAGEUP; - else if (range->scroll_type == GTK_SCROLL_PAGE_FORWARD) command = wxEVT_SCROLL_PAGEDOWN; - - int value = (int)ceil(adjust->value); + // 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 ); + } - int orient = wxHORIZONTAL; - if ( (win->GetWindowStyleFlag() & wxSB_VERTICAL) == wxSB_VERTICAL) - orient = wxVERTICAL; + // 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 ); + } - wxScrollEvent event( command, win->GetId(), value, orient ); + // and also generate a command event for compatibility + wxCommandEvent event( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); event.SetEventObject( win ); - win->GetEventHandler()->ProcessEvent( event ); + event.SetInt( value ); + win->HandleWindowEvent( event ); +} - wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, win->GetId() ); - cevent.SetEventObject( win ); - cevent.SetInt( value ); - win->GetEventHandler()->ProcessEvent( cevent ); +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(_T("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; } //----------------------------------------------------------------------------- -// wxSlider +// "value_changed" //----------------------------------------------------------------------------- -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 ) +extern "C" { +static void +gtk_value_changed(GtkRange* range, wxSlider* win) { - m_acceptsFocus = TRUE; - m_needParent = TRUE; + 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 (!PreCreation( parent, pos, size ) || - !CreateBase( parent, id, pos, size, style, validator, name )) + if (!win->m_hasVMT || g_blockEventsOnDrag) + return; + + if (win->m_blockScrollEvent) { - wxFAIL_MSG( wxT("wxSlider creation failed") ); - return FALSE; + win->m_scrollEventType = GTK_SCROLL_NONE; + return; } - 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) + wxEventType eventType = wxEVT_NULL; + if (win->m_isScrolling) { - gtk_scale_set_draw_value( GTK_SCALE( m_widget ), TRUE ); - gtk_scale_set_digits( GTK_SCALE( m_widget ), 0 ); + 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; - /* labels need more space and too small window will - cause junk to appear on the dialog */ - if (style & wxSL_VERTICAL) + if (IsScrollIncrement(adj->page_increment, diff)) { - wxSize sz( size ); - if (sz.x < 35) - { - sz.x = 35; - SetSize( sz ); - } + 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 { - wxSize sz( size ); - if (sz.y < 35) - { - sz.y = 35; - SetSize( sz ); - } + // Assume track event + eventType = wxEVT_SCROLL_THUMBTRACK; + // Remember that we're tracking + win->m_isScrolling = true; } } - else - gtk_scale_set_draw_value( GTK_SCALE( m_widget ), FALSE ); - m_adjust = gtk_range_get_adjustment( GTK_RANGE(m_widget) ); + win->m_scrollEventType = GTK_SCROLL_NONE; - gtk_signal_connect( GTK_OBJECT(m_adjust), - "value_changed", - (GtkSignalFunc) gtk_slider_callback, - (gpointer) this ); - - SetRange( minValue, maxValue ); - SetValue( value ); + // If integral position has changed + if (wxRound(oldPos) != pos) + { + ProcessScrollEvent(win, eventType); + win->m_needThumbRelease = eventType == wxEVT_SCROLL_THUMBTRACK; + } +} +} - m_parent->DoAddChild( this ); +//----------------------------------------------------------------------------- +// "move_slider" (keyboard event) +//----------------------------------------------------------------------------- - PostCreation(); +extern "C" { +static void +gtk_move_slider(GtkRange*, GtkScrollType scrollType, wxSlider* win) +{ + // Save keyboard scroll type for "value_changed" handler + win->m_scrollEventType = scrollType; +} +} - SetBackgroundColour( parent->GetBackgroundColour() ); +//----------------------------------------------------------------------------- +// "button_press_event" +//----------------------------------------------------------------------------- - Show( TRUE ); +extern "C" { +static gboolean +gtk_button_press_event(GtkWidget*, GdkEventButton*, wxSlider* win) +{ + win->m_mouseButtonDown = true; - return TRUE; + return false; } - -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); } -void wxSlider::SetValue( int value ) -{ - float fpos = (float)value; - m_oldPos = fpos; - if (fabs(fpos-m_adjust->value) < 0.2) return; +//----------------------------------------------------------------------------- +// "event_after" +//----------------------------------------------------------------------------- - m_adjust->value = fpos; +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); - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "value_changed" ); + 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; + } +} } -void wxSlider::SetRange( int minValue, int maxValue ) -{ - float fmin = (float)minValue; - float fmax = (float)maxValue; +//----------------------------------------------------------------------------- +// "button_release_event" +//----------------------------------------------------------------------------- - if ((fabs(fmin-m_adjust->lower) < 0.2) && - (fabs(fmax-m_adjust->upper) < 0.2)) +extern "C" { +static gboolean +gtk_button_release_event(GtkRange* range, GdkEventButton*, wxSlider* win) +{ + win->m_mouseButtonDown = false; + if (win->m_isScrolling) { - return; + win->m_isScrolling = false; + g_signal_handlers_unblock_by_func(range, (gpointer) gtk_event_after, win); } - - m_adjust->lower = fmin; - m_adjust->upper = fmax; - m_adjust->step_increment = 1.0; - m_adjust->page_increment = ceil((fmax-fmin) / 10.0); - - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); + return false; +} } -int wxSlider::GetMin() const +//----------------------------------------------------------------------------- +// "format_value" +//----------------------------------------------------------------------------- + +extern "C" { +static gchar* gtk_format_value(GtkScale*, double value, void*) { - return (int)ceil(m_adjust->lower); + // Format value as nearest integer + return g_strdup_printf("%d", wxRound(value)); +} } -int wxSlider::GetMax() const +//----------------------------------------------------------------------------- +// wxSlider +//----------------------------------------------------------------------------- + +IMPLEMENT_DYNAMIC_CLASS(wxSlider,wxControl) + +wxSlider::wxSlider() { - return (int)ceil(m_adjust->upper); + m_pos = 0; + m_scrollEventType = GTK_SCROLL_NONE; + m_needThumbRelease = false; + m_blockScrollEvent = false; } -void wxSlider::SetPageSize( int pageSize ) +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) { - float fpage = (float)pageSize; + m_pos = value; + m_scrollEventType = GTK_SCROLL_NONE; - if (fabs(fpage-m_adjust->page_increment) < 0.2) return; + if (!PreCreation( parent, pos, size ) || + !CreateBase( parent, id, pos, size, style, validator, name )) + { + wxFAIL_MSG( wxT("wxSlider creation failed") ); + return false; + } - m_adjust->page_increment = fpage; + if (style & wxSL_VERTICAL) + m_widget = gtk_vscale_new( (GtkAdjustment *) NULL ); + else + m_widget = gtk_hscale_new( (GtkAdjustment *) NULL ); - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); -} + 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); -int wxSlider::GetPageSize() const -{ - return (int)ceil(m_adjust->page_increment); -} + if (style & wxSL_INVERSE) + gtk_range_set_inverted( GTK_RANGE(m_widget), TRUE ); -void wxSlider::SetThumbLength( int len ) -{ - float flen = (float)len; + 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 ); + + // don't call the public SetValue() as it won't do anything unless the + // value really changed + GTKSetValue( value ); - if (fabs(flen-m_adjust->page_size) < 0.2) return; + m_parent->DoAddChild( this ); - m_adjust->page_size = flen; + PostCreation(size); - gtk_signal_emit_by_name( GTK_OBJECT(m_adjust), "changed" ); + return true; } -int wxSlider::GetThumbLength() const +int wxSlider::GetValue() const { - return (int)ceil(m_adjust->page_size); + return wxRound(m_pos); } -void wxSlider::SetLineSize( int WXUNUSED(lineSize) ) +void wxSlider::SetValue( int value ) { + if (GetValue() != value) + GTKSetValue(value); } -int wxSlider::GetLineSize() const +void wxSlider::GTKSetValue(int value) { - return 0; + m_blockScrollEvent = true; + gtk_range_set_value(GTK_RANGE (m_widget), value); + m_blockScrollEvent = false; } -void wxSlider::SetTick( int WXUNUSED(tickPos) ) +void wxSlider::SetRange( int minValue, int maxValue ) { + 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; } -void wxSlider::SetTickFreq( int WXUNUSED(n), int WXUNUSED(pos) ) +int wxSlider::GetMin() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->lower); } -int wxSlider::GetTickFreq() const +int wxSlider::GetMax() const { - return 0; + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->upper); } -void wxSlider::ClearTicks() +void wxSlider::SetPageSize( int pageSize ) { + m_blockScrollEvent = true; + gtk_range_set_increments(GTK_RANGE (m_widget), GetLineSize(), pageSize); + m_blockScrollEvent = false; } -void wxSlider::SetSelection( int WXUNUSED(minPos), int WXUNUSED(maxPos) ) +int wxSlider::GetPageSize() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->page_increment); } -int wxSlider::GetSelEnd() const +// GTK does not support changing the size of the slider +void wxSlider::SetThumbLength(int) { - return 0; } -int wxSlider::GetSelStart() const +int wxSlider::GetThumbLength() const { return 0; } -void wxSlider::ClearSel() +void wxSlider::SetLineSize( int lineSize ) +{ + m_blockScrollEvent = true; + gtk_range_set_increments(GTK_RANGE (m_widget), lineSize, GetPageSize()); + m_blockScrollEvent = false; +} + +int wxSlider::GetLineSize() const { + return int(gtk_range_get_adjustment (GTK_RANGE (m_widget))->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_widget)->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 +#endif // wxUSE_SLIDER