gtkcalendar.c

gtk是linux一款强大的夸平台的图形化开发工具

  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);

  /* Header window ------------------------------------- */
  if (calendar->display_flags & GTK_CALENDAR_SHOW_HEADING)
    {
      attributes.wclass = GDK_INPUT_OUTPUT;
      attributes.window_type = GDK_WINDOW_CHILD;
      attributes.visual = gtk_widget_get_visual (widget);
      attributes.colormap = gtk_widget_get_colormap (widget);
      attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
      attributes.x = 2;
      attributes.y = 2;
      attributes.width = widget->allocation.width - 4;
      attributes.height = private_data->header_h;
      private_data->header_win = gdk_window_new (widget->window,
					     &attributes, attributes_mask);
      
      gdk_window_set_background (private_data->header_win,
				 HEADER_BG_COLOR (GTK_WIDGET (calendar)));
      gdk_window_show (private_data->header_win);
      gdk_window_set_user_data (private_data->header_win, widget);
      
    }
  else
    {
      private_data->header_win = NULL;
    }
  gtk_calendar_realize_arrows (widget);
}

static void
gtk_calendar_realize_day_names (GtkWidget *widget)
{
  GtkCalendar *calendar;
  GtkCalendarPrivateData *private_data;
  GdkWindowAttr attributes;
  gint attributes_mask;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CALENDAR (widget));
  
  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);

  /* Day names	window --------------------------------- */
  if ( calendar->display_flags & GTK_CALENDAR_SHOW_DAY_NAMES)
    {
      attributes.wclass = GDK_INPUT_OUTPUT;
      attributes.window_type = GDK_WINDOW_CHILD;
      attributes.visual = gtk_widget_get_visual (widget);
      attributes.colormap = gtk_widget_get_colormap (widget);
      attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
      attributes.x = (widget->style->klass->xthickness + INNER_BORDER);
      attributes.y = private_data->header_h + (widget->style->klass->ythickness 
					   + INNER_BORDER);
      attributes.width = (widget->allocation.width 
			  - (widget->style->klass->xthickness + INNER_BORDER) 
			  * 2);
      attributes.height = private_data->day_name_h;
      private_data->day_name_win = gdk_window_new (widget->window,
						   &attributes, 
						   attributes_mask);
      gdk_window_set_background (private_data->day_name_win, 
				 BACKGROUND_COLOR ( GTK_WIDGET ( calendar)));
      gdk_window_show (private_data->day_name_win);
      gdk_window_set_user_data (private_data->day_name_win, widget);
    }
  else
    {
      private_data->day_name_win = NULL;
    }
}

static void
gtk_calendar_realize_week_numbers (GtkWidget *widget)
{
  GtkCalendar *calendar;
  GtkCalendarPrivateData *private_data;
  GdkWindowAttr attributes;
  gint attributes_mask;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CALENDAR (widget));
  
  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);

  /* Week number window -------------------------------- */
  if (calendar->display_flags & GTK_CALENDAR_SHOW_WEEK_NUMBERS)
    {
      attributes.wclass = GDK_INPUT_OUTPUT;
      attributes.window_type = GDK_WINDOW_CHILD;
      attributes.visual = gtk_widget_get_visual (widget);
      attributes.colormap = gtk_widget_get_colormap (widget);
      attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
      
      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
      attributes.x = + (widget->style->klass->xthickness + INNER_BORDER);
      attributes.y = (private_data->header_h + private_data->day_name_h 
		      + (widget->style->klass->ythickness + INNER_BORDER));
      attributes.width = private_data->week_width;
      attributes.height = private_data->main_h;
      private_data->week_win = gdk_window_new (widget->window,
					       &attributes, attributes_mask);
      gdk_window_set_background (private_data->week_win,  
				 BACKGROUND_COLOR (GTK_WIDGET (calendar)));
      gdk_window_show (private_data->week_win);
      gdk_window_set_user_data (private_data->week_win, widget);
    } 
  else
    {
      private_data->week_win = NULL;
    }
}

static void
gtk_calendar_realize (GtkWidget *widget)
{
  GtkCalendar *calendar;
  GtkCalendarPrivateData *private_data;
  GdkWindowAttr attributes;
  gint attributes_mask;
  GdkGCValues values;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CALENDAR (widget));
  
  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);
  
  GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
  gtk_calendar_compute_days (calendar);
  
  attributes.x = widget->allocation.x;
  attributes.y = widget->allocation.y;
  attributes.width = widget->allocation.width;
  attributes.height = widget->allocation.height;
  attributes.wclass = GDK_INPUT_OUTPUT;
  attributes.window_type = GDK_WINDOW_CHILD;
  attributes.event_mask =  (gtk_widget_get_events (widget) 
			    | GDK_EXPOSURE_MASK |GDK_KEY_PRESS_MASK);
  attributes.visual = gtk_widget_get_visual (widget);
  attributes.colormap = gtk_widget_get_colormap (widget);
  
  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
  widget->window = gdk_window_new (widget->parent->window,
				   &attributes, attributes_mask);
  
  widget->style = gtk_style_attach (widget->style, widget->window);
  
  /* Header window ------------------------------------- */
  gtk_calendar_realize_header (widget);
  /* Day names	window --------------------------------- */
  gtk_calendar_realize_day_names (widget);
  /* Week number window -------------------------------- */
  gtk_calendar_realize_week_numbers (widget);
  /* Main Window --------------------------------------	 */
  attributes.event_mask =  (gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK
			    | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK
			    | GDK_POINTER_MOTION_MASK | GDK_LEAVE_NOTIFY_MASK);
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_WEEK_NUMBERS)
    attributes.x = private_data->week_width;
  else
    attributes.x = 0;
  attributes.x += (widget->style->klass->xthickness + INNER_BORDER);
  attributes.y = (private_data->header_h + private_data->day_name_h 
		  + (widget->style->klass->ythickness + INNER_BORDER));
  attributes.width = (widget->allocation.width - attributes.x 
		      - (widget->style->klass->xthickness + INNER_BORDER));
  attributes.height = private_data->main_h;
  private_data->main_win = gdk_window_new (widget->window,
					   &attributes, attributes_mask);
  gdk_window_set_background (private_data->main_win, 
			     BACKGROUND_COLOR ( GTK_WIDGET ( calendar)));
  gdk_window_show (private_data->main_win);
  gdk_window_set_user_data (private_data->main_win, widget);
  gdk_window_set_background (widget->window, BACKGROUND_COLOR (widget));
  gdk_window_show (widget->window);
  gdk_window_set_user_data (widget->window, widget);
  
  /* Set widgets gc */
  calendar->gc = gdk_gc_new (widget->window);

  values.foreground = widget->style->white;
  values.function = GDK_XOR;
  calendar->xor_gc = gdk_gc_new_with_values (widget->window,
					     &values,
					     GDK_GC_FOREGROUND |
					     GDK_GC_FUNCTION);
}

static void
gtk_calendar_unrealize (GtkWidget *widget)
{
  GtkCalendar *calendar;
  GtkCalendarPrivateData *private_data;
  gint i;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CALENDAR (widget));
  
  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);
  
  if (private_data->header_win)
    {
      for (i = 0; i < 4; i++)
	{
	  if (private_data->arrow_win[i])
	    {
	      gdk_window_set_user_data (private_data->arrow_win[i], NULL);
	      gdk_window_destroy (private_data->arrow_win[i]);
	      private_data->arrow_win[i] = NULL;
	    }
	}
      gdk_window_set_user_data (private_data->header_win, NULL);
      gdk_window_destroy (private_data->header_win);
      private_data->header_win = NULL;
    }
  
  if (private_data->week_win)
    {
      gdk_window_set_user_data (private_data->week_win, NULL);
      gdk_window_destroy (private_data->week_win);
      private_data->week_win = NULL;      
    }
  
  if (private_data->main_win)
    {
      gdk_window_set_user_data (private_data->main_win, NULL);
      gdk_window_destroy (private_data->main_win);
      private_data->main_win = NULL;      
    }
  
  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}

static void
gtk_calendar_size_request (GtkWidget	  *widget,
			   GtkRequisition *requisition)
{
  GtkCalendar *calendar;
  GtkCalendarPrivateData *private_data;

  gint height;
  gint i;
  gchar buffer[255];
  gint calendar_margin = CALENDAR_MARGIN;
  gint header_width, main_width;
  gint lbearing;
  gint rbearing;
  gint ascent;
  gint descent;
  gint width;
  
  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);
  
  /*
   * Calculate the requisition	width for the widget.
   */
  
  /* Header width */
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_HEADING)
    {
      private_data->max_month_width = 0;
      for (i = 0; i < 12; i++)
	{
	  private_data->max_month_width = MAX (private_data->max_month_width,
					       gdk_string_measure (HEADER_FONT (widget),
								   default_monthname[i]) + 8);
	}
      private_data->max_year_width = 0;
      for (i=0; i<10; i++)
	{
	  sprintf (buffer, "%d%d%d%d", i,i,i,i);
	  private_data->max_year_width = MAX (private_data->max_year_width,
					      gdk_string_measure (HEADER_FONT (widget),
								  buffer) + 8);
	}
    } 
  else 
    {
      private_data->max_month_width = 0;
      private_data->max_year_width = 0;
    }
  
  if (calendar->display_flags & GTK_CALENDAR_NO_MONTH_CHANGE)
    header_width = (private_data->max_month_width 
		    + private_data->max_year_width
		    + 3 * 3);
  else
    header_width = (private_data->max_month_width 
		    + private_data->max_year_width
		    + 4 * private_data->arrow_width + 3 * 3);

  /* Mainwindow labels width */
  
  private_data->max_day_char_width = 0;
  for (i = 0; i < 9; i++)
    {
      sprintf (buffer, "%d%d", i, i);
      private_data->min_day_width = MAX (private_data->max_day_char_width,
				     gdk_string_measure (DAY_FONT (widget),
							 buffer));
    }
  /* We add one to max_day_char_width to be able to make the marked day "bold" */
  private_data->max_day_char_width = private_data->min_day_width / 2 +1;
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_DAY_NAMES)
    for (i = 0; i < 7; i++)
      {
	gdk_text_extents (LABEL_FONT (widget),
			  default_abbreviated_dayname[i],
			  strlen(default_abbreviated_dayname[i]),
			  &lbearing,
			  &rbearing,
			  &width,
			  &ascent,
			  &descent);
	private_data->min_day_width = MAX (private_data->min_day_width, width);
	private_data->max_label_char_ascent = MAX (private_data->max_label_char_ascent, 
					       ascent);
	private_data->max_label_char_descent = MAX (private_data->max_label_char_descent, 
						    descent);
      }
  
  private_data->max_week_char_width = 0;
  if (calendar->display_flags & GTK_CALENDAR_SHOW_WEEK_NUMBERS)
    for (i = 0; i < 9; i++)
      {
	sprintf (buffer, "%d%d", i, i);
	private_data->max_week_char_width = MAX (private_data->max_week_char_width,
					     gdk_string_measure (LABEL_FONT (widget), buffer) / 2);
      }
  
  main_width = (7 * (private_data->min_day_width + DAY_XPAD * 2) + (DAY_XSEP * 6) + CALENDAR_MARGIN * 2
		+ (private_data->max_week_char_width
		   ? private_data->max_week_char_width * 2 + DAY_XPAD * 2 + CALENDAR_XSEP * 2
		   : 0));
  
  
  requisition->width = MAX (header_width+4, main_width + (widget->style->klass->xthickness + INNER_BORDER) *2);
  
  /*
   * Calculate the requisition height for the widget.
   */
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_HEADING)
    {
      private_data->header_h = (HEADER_FONT (widget)->ascent 
				+ HEADER_FONT (widget)->descent
				+ CALENDAR_YSEP * 2);
    }
  else
    {
      private_data->header_h = 0;
    }
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_DAY_NAMES)
    {
      private_data->day_name_h = (private_data->max_label_char_ascent
				  + private_data->max_label_char_descent
				  + 2 * DAY_YPAD + calendar_margin);
      calendar_margin = CALENDAR_YSEP;
    } 
  else
    {
      private_data->day_name_h = 0;
    }

  gdk_text_extents (DAY_FONT (widget),
		    "0123456789",
		    10,
		    &lbearing,
		    &rbearing,
		    &width,
		    &private_data->max_day_char_ascent,
		    &private_data->max_day_char_descent);
  
  private_data->main_h = (CALENDAR_MARGIN + calendar_margin
			  + 6 * (private_data->max_day_char_ascent
				 + private_data->max_day_char_descent 
				 + DAY_YPAD * 2)
			  + DAY_YSEP * 5);
  
  /* 
   * If we display weeknumbers we need some extra space 
   */
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_WEEK_NUMBERS)
    {
      private_data->main_h = MAX (private_data->main_h,
				  (CALENDAR_MARGIN + calendar_margin
				   + 6 * (private_data->max_day_char_ascent 
					  + private_data->max_day_char_descent 
					  + DAY_YPAD * 2)
				   + DAY_YSEP * 5));
    }
  
  height = (private_data->header_h + private_data->day_name_h 
	    + private_data->main_h);
  
  requisition->height = height + (widget->style->klass->ythickness + INNER_BORDER) * 2;
}

static void
gtk_calendar_size_allocate (GtkWidget	  *widget,
			    GtkAllocation *allocation)
{
  GtkCalendar *calendar;
  GtkCalendarPrivateData *private_data;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_CALENDAR (widget));
  g_return_if_fail (allocation != NULL);
  
  widget->allocation = *allocation;
  
  calendar = GTK_CALENDAR (widget);
  private_data = GTK_CALENDAR_PRIVATE_DATA (widget);
  
  if (calendar->display_flags & GTK_CALENDAR_SHOW_WEEK_NUMBERS)
    {
      private_data->day_width = (private_data->min_day_width
			     * ((allocation->width - (widget->style->klass->xthickness + INNER_BORDER) * 2
				 - (CALENDAR_MARGIN * 2) -  (DAY_XSEP * 7) - CALENDAR_XSEP * 2))
			     / (7 * private_data->min_day_width + private_data->max_week_char_width * 2));
      private_data->week_width = ((allocation->width - (widget->style->klass->xthickness + INNER_BORDER) * 2
			       - (CALENDAR_MARGIN * 2) - (DAY_XSEP * 7) - CALENDAR_XSEP * 2 )
			      - private_data->day_width * 7 + CALENDAR_MARGIN + CALENDAR_XSEP);
    } 
  else 
    {
      private_data->day_width = (allocation->width
			     - (widget->style->klass->xthickness + INNER_BORDER) * 2
			     - (CALENDAR_MARGIN * 2)
			     - (DAY_XSEP * 7))/7;
      private_data->week_width = 0;
    }
  
  if (GTK_WIDGET_REALIZED (widget))
    {
      gdk_window_move_resize (widget->window,