Removed the existing date/time picker; this isn't the preferred way to d o it in modern programs according to Company
This commit is contained in:
Pietro Gagliardi
parent
da991fd5bd
commit
04d2c460ae
208
gtkdtp/dtp.c
208
gtkdtp/dtp.c
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// 3 september 2015
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#define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_32
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#define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_32
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#define GDK_VERSION_MIN_REQUIRED GDK_VERSION_3_4
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#define GDK_VERSION_MAX_ALLOWED GDK_VERSION_3_4
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#include <gtk/gtk.h>
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#define dateTimePickerType (dateTimePicker_get_type())
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#define dateTimePicker(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), dateTimePickerType, dateTimePicker))
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#define isDateTimePicker(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), dateTimePickerType))
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#define dateTimePickerClass(class) (G_TYPE_CHECK_CLASS_CAST((class), dateTimePickerType, dateTimePickerClass))
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#define isDateTimePickerClass(class) (G_TYPE_CHECK_CLASS_TYPE((class), dateTimePickerType))
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#define dateTimePickerGetClass(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), dateTimePickerType, dateTimePickerClass))
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typedef struct dateTimePicker dateTimePicker;
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typedef struct dateTimePickerClass dateTimePickerClass;
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struct dateTimePicker {
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GtkContainer parent_instance;
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};
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struct dateTimePickerClass {
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GtkContainerClass parent_class;
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};
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G_DEFINE_TYPE(dateTimePicker, dateTimePicker, GTK_TYPE_CONTAINER)
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static void dateTimePicker_init(dateTimePicker *d)
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{
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GtkStyleContext *context;
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gtk_widget_set_has_window(GTK_WIDGET(d), FALSE);
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context = gtk_widget_get_style_context(GTK_WIDGET(d));
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gtk_style_context_add_class(context, GTK_STYLE_CLASS_ENTRY);
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}
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static void dateTimePicker_dispose(GObject *obj)
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{
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G_OBJECT_CLASS(dateTimePicker_parent_class)->dispose(obj);
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}
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static void dateTimePicker_finalize(GObject *obj)
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{
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G_OBJECT_CLASS(dateTimePicker_parent_class)->finalize(obj);
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}
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// All of this is to imitate GtkEntry without actually using its code
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// TODO when updating to GTK+ 3.10, copy its imitations too
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// This is a hard-coded value that has remained unchanged since 3.4.
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#define minEntryWidth 150
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struct metrics {
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gint ascent;
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gint descent;
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gboolean interiorFocus;
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gint focusWidth;
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GtkBorder border;
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};
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static struct metrics metrics(dateTimePicker *d)
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{
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struct metrics m;
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GtkStyleContext *scontext;
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PangoContext *pcontext;
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GtkStateFlags stateflags;
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PangoFontMetrics *pmetrics;
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GtkBorder padding;
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scontext = gtk_widget_get_style_context(GTK_WIDGET(d));
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pcontext = gtk_widget_get_pango_context(GTK_WIDGET(d));
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stateflags = gtk_widget_get_state_flags(GTK_WIDGET(d));
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pmetrics = pango_context_get_metrics(pcontext,
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gtk_style_context_get_font(scontext, stateflags),
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pango_context_get_language(pcontext));
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m.ascent = pango_font_metrics_get_ascent(pmetrics);
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m.descent = pango_font_metrics_get_descent(pmetrics);
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pango_font_metrics_unref(pmetrics);
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gtk_widget_style_get(GTK_WIDGET(d),
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"interior-focus", &(m.interiorFocus),
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"focus-line-width", &(m.focusWidth),
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NULL);
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gtk_style_context_get_border(scontext, 0, &(m.border));
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gtk_style_context_get_padding(scontext, 0, &padding);
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m.border.left += padding.left;
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m.border.top += padding.top;
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m.border.right += padding.right;
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m.border.bottom += padding.bottom;
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if (!m.interiorFocus) {
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m.border.left += m.focusWidth;
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m.border.top += m.focusWidth;
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m.border.right += m.focusWidth;
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m.border.bottom += m.focusWidth;
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}
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return m;
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}
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static void dateTimePicker_get_preferred_width(GtkWidget *w, gint *minimum, gint *natural)
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{
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dateTimePicker *d = dateTimePicker(w);
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struct metrics m;
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m = metrics(d);
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// TODO base width on content
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*minimum = minEntryWidth + m.border.left + m.border.right;
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*natural = *minimum;
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}
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static void dateTimePicker_get_preferred_height(GtkWidget *w, gint *minimum, gint *natural)
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{
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dateTimePicker *d = dateTimePicker(w);
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struct metrics m;
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m = metrics(d);
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// TODO base width on content
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*minimum = PANGO_PIXELS(m.ascent + m.descent) + m.border.top + m.border.bottom;
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*natural = *minimum;
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}
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static void dateTimePicker_size_allocate(GtkWidget *w, GtkAllocation *allocation)
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{
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gtk_widget_set_allocation(w, allocation);
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}
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static gint dateTimePicker_draw(GtkWidget *w, cairo_t *cr)
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{
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dateTimePicker *d = dateTimePicker(w);
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GtkStyleContext *context;
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gint x, y, width, height;
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struct metrics m;
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GtkAllocation allocation;
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GtkRequisition minimum;
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gint minHeight;
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context = gtk_widget_get_style_context(GTK_WIDGET(d));
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x = 0;
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y = 0;
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m = metrics(d);
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// draw background, shadow, focus, etc.
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cairo_save(cr);
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gtk_widget_get_allocation(GTK_WIDGET(d), &allocation);
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gtk_widget_get_preferred_size(GTK_WIDGET(d), &minimum, NULL);
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minHeight = minimum.height - gtk_widget_get_margin_top(GTK_WIDGET(d)) - gtk_widget_get_margin_bottom(GTK_WIDGET(d));
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x = 0;
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y = (allocation.height - minHeight) / 2;
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width = allocation.width;
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height = minHeight;
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cairo_translate(cr, x, y);
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x = 0;
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y = 0;
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if (gtk_widget_has_focus(GTK_WIDGET(d)) & !m.interiorFocus) {
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x += m.focusWidth;
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y += m.focusWidth;
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width -= 2 * m.focusWidth;
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height -= 2 * m.focusWidth;
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}
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gtk_render_background(context, cr, x, y, width, height);
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gtk_render_frame(context, cr, x, y, width, height);
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if (gtk_widget_has_visible_focus(GTK_WIDGET(d)) & !m.interiorFocus) {
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x -= m.focusWidth;
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y -= m.focusWidth;
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width += 2 * m.focusWidth;
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height += 2 * m.focusWidth;
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// TODO 0,0? this was removed in 3.14...
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gtk_render_focus(context, cr, 0, 0, width, height);
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}
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cairo_restore(cr);
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return FALSE;
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}
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static void dateTimePicker_class_init(dateTimePickerClass *class)
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{
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G_OBJECT_CLASS(class)->dispose = dateTimePicker_dispose;
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G_OBJECT_CLASS(class)->finalize = dateTimePicker_finalize;
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GTK_WIDGET_CLASS(class)->get_preferred_width = dateTimePicker_get_preferred_width;
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GTK_WIDGET_CLASS(class)->get_preferred_height = dateTimePicker_get_preferred_height;
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GTK_WIDGET_CLASS(class)->size_allocate = dateTimePicker_size_allocate;
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GTK_WIDGET_CLASS(class)->draw = dateTimePicker_draw;
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// GTK_CONTAINER_CLASS(class)->forall = dateTimePicker_forall;
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}
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// #qo pkg-config: gtk+-3.0
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int main(void)
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{
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GtkWidget *mainwin;
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GtkWidget *dtp;
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gtk_init(NULL, NULL);
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mainwin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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gtk_container_set_border_width(GTK_CONTAINER(mainwin), 12);
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g_signal_connect(mainwin, "destroy", G_CALLBACK(gtk_main_quit), NULL);
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dtp = GTK_WIDGET(g_object_new(dateTimePickerType, NULL));
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gtk_container_add(GTK_CONTAINER(mainwin), dtp);
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gtk_widget_show_all(mainwin);
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gtk_main();
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return 0;
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}
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