gtknotebook.c

gtk是linux一款强大的夸平台的图形化开发工具

/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the GTK+ Team and others 1997-1999.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

#include "gtknotebook.h"
#include "gtksignal.h"
#include "gtkmain.h"
#include "gtkmenu.h"
#include "gtkmenuitem.h"
#include "gtklabel.h"
#include <gdk/gdkkeysyms.h>
#include <stdio.h>
#include "gtkintl.h"


#define TAB_OVERLAP    2
#define TAB_CURVATURE  1
#define ARROW_SIZE     12
#define ARROW_SPACING  0
#define FOCUS_WIDTH    1
#define NOTEBOOK_INIT_SCROLL_DELAY (200)
#define NOTEBOOK_SCROLL_DELAY      (100)


enum {
  SWITCH_PAGE,
  LAST_SIGNAL
};

enum {
  STEP_PREV,
  STEP_NEXT
};

enum {
  ARG_0,
  ARG_TAB_POS,
  ARG_SHOW_TABS,
  ARG_SHOW_BORDER,
  ARG_SCROLLABLE,
  ARG_TAB_BORDER,
  ARG_TAB_HBORDER,
  ARG_TAB_VBORDER,
  ARG_PAGE,
  ARG_ENABLE_POPUP,
  ARG_HOMOGENEOUS
};

enum {
  CHILD_ARG_0,
  CHILD_ARG_TAB_LABEL,
  CHILD_ARG_MENU_LABEL,
  CHILD_ARG_POSITION,
  CHILD_ARG_TAB_EXPAND,
  CHILD_ARG_TAB_FILL,
  CHILD_ARG_TAB_PACK
};

/** GtkNotebook Methods **/
static void gtk_notebook_class_init          (GtkNotebookClass *klass);
static void gtk_notebook_init                (GtkNotebook      *notebook);

/** GtkObject Methods **/
static void gtk_notebook_destroy             (GtkObject        *object);
static void gtk_notebook_set_arg             (GtkObject        *object,
				              GtkArg           *arg,
				              guint             arg_id);
static void gtk_notebook_get_arg	     (GtkObject        *object,
					      GtkArg           *arg,
					      guint             arg_id);

/** GtkWidget Methods **/
static void gtk_notebook_map                 (GtkWidget        *widget);
static void gtk_notebook_unmap               (GtkWidget        *widget);
static void gtk_notebook_realize             (GtkWidget        *widget);
static void gtk_notebook_unrealize           (GtkWidget        *widget);
static void gtk_notebook_size_request        (GtkWidget        *widget,
					      GtkRequisition   *requisition);
static void gtk_notebook_size_allocate       (GtkWidget        *widget,
					      GtkAllocation    *allocation);
static void gtk_notebook_draw                (GtkWidget        *widget,
					      GdkRectangle     *area);
static gint gtk_notebook_expose              (GtkWidget        *widget,
					      GdkEventExpose   *event);
static gint gtk_notebook_button_press        (GtkWidget        *widget,
					      GdkEventButton   *event);
static gint gtk_notebook_button_release      (GtkWidget        *widget,
					      GdkEventButton   *event);
static gint gtk_notebook_enter_notify        (GtkWidget        *widget,
					      GdkEventCrossing *event);
static gint gtk_notebook_leave_notify        (GtkWidget        *widget,
					      GdkEventCrossing *event);
static gint gtk_notebook_motion_notify       (GtkWidget        *widget,
					      GdkEventMotion   *event);
static gint gtk_notebook_key_press           (GtkWidget        *widget,
					      GdkEventKey      *event);
static gint gtk_notebook_focus_in            (GtkWidget        *widget,
					      GdkEventFocus    *event);
static gint gtk_notebook_focus_out           (GtkWidget        *widget,
					      GdkEventFocus    *event);
static void gtk_notebook_draw_focus          (GtkWidget        *widget);
static void gtk_notebook_style_set           (GtkWidget        *widget,
					      GtkStyle         *previous_style);

/** GtkContainer Methods **/
static void gtk_notebook_set_child_arg	     (GtkContainer     *container,
					      GtkWidget        *child,
					      GtkArg           *arg,
					      guint             arg_id);
static void gtk_notebook_get_child_arg	     (GtkContainer     *container,
					      GtkWidget        *child,
					      GtkArg           *arg,
					      guint             arg_id);
static void gtk_notebook_add                 (GtkContainer     *container,
					      GtkWidget        *widget);
static void gtk_notebook_remove              (GtkContainer     *container,
					      GtkWidget        *widget);
static gint gtk_notebook_focus               (GtkContainer     *container,
					      GtkDirectionType  direction);
static void gtk_notebook_set_focus_child     (GtkContainer     *container,
					      GtkWidget        *child);
static GtkType gtk_notebook_child_type       (GtkContainer     *container);
static void gtk_notebook_forall              (GtkContainer     *container,
					      gboolean		include_internals,
					      GtkCallback       callback,
					      gpointer          callback_data);

/** GtkNotebook Private Functions **/
static void gtk_notebook_panel_realize       (GtkNotebook      *notebook);
static void gtk_notebook_expose_tabs         (GtkNotebook      *notebook);
static void gtk_notebook_focus_changed       (GtkNotebook      *notebook,
					      GtkNotebookPage  *old_page);
static void gtk_notebook_real_remove         (GtkNotebook      *notebook,
					      GList            *list);
static void gtk_notebook_update_labels       (GtkNotebook      *notebook);
static gint gtk_notebook_timer               (GtkNotebook      *notebook);
static gint gtk_notebook_page_compare        (gconstpointer     a,
					      gconstpointer     b);
static gint  gtk_notebook_real_page_position (GtkNotebook      *notebook,
					      GList            *list);
static GList * gtk_notebook_search_page      (GtkNotebook      *notebook,
					      GList            *list,
					      gint              direction,
					      gboolean          find_visible);

/** GtkNotebook Drawing Functions **/
static void gtk_notebook_paint               (GtkWidget        *widget,
					      GdkRectangle     *area);
static void gtk_notebook_draw_tab            (GtkNotebook      *notebook,
					      GtkNotebookPage  *page,
					      GdkRectangle     *area);
static void gtk_notebook_draw_arrow          (GtkNotebook      *notebook,
					      guint             arrow);
static void gtk_notebook_set_shape           (GtkNotebook      *notebook);

/** GtkNotebook Size Allocate Functions **/
static void gtk_notebook_pages_allocate      (GtkNotebook      *notebook,
					      GtkAllocation    *allocation);
static void gtk_notebook_page_allocate       (GtkNotebook      *notebook,
					      GtkNotebookPage  *page,
					      GtkAllocation    *allocation);
static void gtk_notebook_calc_tabs           (GtkNotebook      *notebook,
			                      GList            *start,
					      GList           **end,
					      gint             *tab_space,
					      guint             direction);

/** GtkNotebook Page Switch Methods **/
static void gtk_notebook_real_switch_page    (GtkNotebook      *notebook,
					      GtkNotebookPage  *page,
					      guint             page_num);

/** GtkNotebook Page Switch Functions **/
static void gtk_notebook_switch_page         (GtkNotebook      *notebook,
					      GtkNotebookPage  *page,
					      gint              page_num);
static gint gtk_notebook_page_select         (GtkNotebook      *notebook);
static void gtk_notebook_switch_focus_tab    (GtkNotebook      *notebook,
                                              GList            *new_child);
static void gtk_notebook_menu_switch_page    (GtkWidget        *widget,
					      GtkNotebookPage  *page);

/** GtkNotebook Menu Functions **/
static void gtk_notebook_menu_item_create    (GtkNotebook      *notebook,
					      GList            *list);
static void gtk_notebook_menu_label_unparent (GtkWidget        *widget,
					      gpointer          data);
static void gtk_notebook_menu_detacher       (GtkWidget        *widget,
					      GtkMenu          *menu);


static GtkContainerClass *parent_class = NULL;
static guint notebook_signals[LAST_SIGNAL] = { 0 };

GtkType
gtk_notebook_get_type (void)
{
  static GtkType notebook_type = 0;

  if (!notebook_type)
    {
      static const GtkTypeInfo notebook_info =
      {
	"GtkNotebook",
	sizeof (GtkNotebook),
	sizeof (GtkNotebookClass),
	(GtkClassInitFunc) gtk_notebook_class_init,
	(GtkObjectInitFunc) gtk_notebook_init,
	/* reserved_1 */ NULL,
        /* reserved_2 */ NULL,
        (GtkClassInitFunc) NULL,
      };

      notebook_type = gtk_type_unique (gtk_container_get_type (), &notebook_info);
    }

  return notebook_type;
}

static void
gtk_notebook_class_init (GtkNotebookClass *class)
{
  GtkObjectClass *object_class;
  GtkWidgetClass *widget_class;
  GtkContainerClass *container_class;

  object_class = (GtkObjectClass*) class;
  widget_class = (GtkWidgetClass*) class;
  container_class = (GtkContainerClass*) class;
  parent_class = gtk_type_class (gtk_container_get_type ());

  gtk_object_add_arg_type ("GtkNotebook::page", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_PAGE);
  gtk_object_add_arg_type ("GtkNotebook::tab_pos", GTK_TYPE_POSITION_TYPE, GTK_ARG_READWRITE, ARG_TAB_POS);
  gtk_object_add_arg_type ("GtkNotebook::tab_border", GTK_TYPE_UINT, GTK_ARG_WRITABLE, ARG_TAB_BORDER);
  gtk_object_add_arg_type ("GtkNotebook::tab_hborder", GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_TAB_HBORDER);
  gtk_object_add_arg_type ("GtkNotebook::tab_vborder", GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_TAB_VBORDER);
  gtk_object_add_arg_type ("GtkNotebook::show_tabs", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_SHOW_TABS);
  gtk_object_add_arg_type ("GtkNotebook::show_border", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_SHOW_BORDER);
  gtk_object_add_arg_type ("GtkNotebook::scrollable", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_SCROLLABLE);
  gtk_object_add_arg_type ("GtkNotebook::enable_popup", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_ENABLE_POPUP);
  gtk_object_add_arg_type ("GtkNotebook::homogeneous", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_HOMOGENEOUS);

  gtk_container_add_child_arg_type ("GtkNotebook::tab_label", GTK_TYPE_STRING, GTK_ARG_READWRITE, CHILD_ARG_TAB_LABEL);
  gtk_container_add_child_arg_type ("GtkNotebook::menu_label", GTK_TYPE_STRING, GTK_ARG_READWRITE, CHILD_ARG_MENU_LABEL);
  gtk_container_add_child_arg_type ("GtkNotebook::position", GTK_TYPE_INT, GTK_ARG_READWRITE, CHILD_ARG_POSITION);
  gtk_container_add_child_arg_type ("GtkNotebook::tab_fill", GTK_TYPE_BOOL, GTK_ARG_READWRITE, CHILD_ARG_TAB_FILL);
  gtk_container_add_child_arg_type ("GtkNotebook::tab_pack", GTK_TYPE_BOOL, GTK_ARG_READWRITE, CHILD_ARG_TAB_PACK);

  notebook_signals[SWITCH_PAGE] =
    gtk_signal_new ("switch_page",
		    GTK_RUN_LAST,
		    object_class->type,
		    GTK_SIGNAL_OFFSET (GtkNotebookClass, switch_page),
		    gtk_marshal_NONE__POINTER_UINT,
		    GTK_TYPE_NONE, 2,
		    GTK_TYPE_POINTER,
		    GTK_TYPE_UINT);

  gtk_object_class_add_signals (object_class, notebook_signals, LAST_SIGNAL);

  object_class->set_arg = gtk_notebook_set_arg;
  object_class->get_arg = gtk_notebook_get_arg;
  object_class->destroy = gtk_notebook_destroy;

  widget_class->map = gtk_notebook_map;
  widget_class->unmap = gtk_notebook_unmap;
  widget_class->realize = gtk_notebook_realize;
  widget_class->unrealize = gtk_notebook_unrealize;
  widget_class->size_request = gtk_notebook_size_request;
  widget_class->size_allocate = gtk_notebook_size_allocate;
  widget_class->draw = gtk_notebook_draw;
  widget_class->expose_event = gtk_notebook_expose;
  widget_class->button_press_event = gtk_notebook_button_press;
  widget_class->button_release_event = gtk_notebook_button_release;
  widget_class->enter_notify_event = gtk_notebook_enter_notify;
  widget_class->leave_notify_event = gtk_notebook_leave_notify;
  widget_class->motion_notify_event = gtk_notebook_motion_notify;
  widget_class->key_press_event = gtk_notebook_key_press;
  widget_class->focus_in_event = gtk_notebook_focus_in;
  widget_class->focus_out_event = gtk_notebook_focus_out;
  widget_class->draw_focus = gtk_notebook_draw_focus;
  widget_class->style_set = gtk_notebook_style_set;
   
  container_class->add = gtk_notebook_add;
  container_class->remove = gtk_notebook_remove;
  container_class->forall = gtk_notebook_forall;
  container_class->focus = gtk_notebook_focus;
  container_class->set_focus_child = gtk_notebook_set_focus_child;
  container_class->get_child_arg = gtk_notebook_get_child_arg;
  container_class->set_child_arg = gtk_notebook_set_child_arg;
  container_class->child_type = gtk_notebook_child_type;

  class->switch_page = gtk_notebook_real_switch_page;
}

static void
gtk_notebook_init (GtkNotebook *notebook)
{
  GTK_WIDGET_SET_FLAGS (notebook, GTK_CAN_FOCUS);
  GTK_WIDGET_UNSET_FLAGS (notebook, GTK_NO_WINDOW);

  notebook->cur_page = NULL;
  notebook->children = NULL;
  notebook->first_tab = NULL;
  notebook->focus_tab = NULL;
  notebook->panel = NULL;
  notebook->menu = NULL;

  notebook->tab_hborder = 2;
  notebook->tab_vborder = 2;

  notebook->show_tabs = TRUE;
  notebook->show_border = TRUE;
  notebook->tab_pos = GTK_POS_TOP;
  notebook->scrollable = FALSE;
  notebook->in_child = 0;
  notebook->click_child = 0;
  notebook->button = 0;
  notebook->need_timer = 0;
  notebook->child_has_focus = FALSE;
  notebook->have_visible_child = FALSE;
}

GtkWidget*
gtk_notebook_new (void)
{
  return GTK_WIDGET (gtk_type_new (gtk_notebook_get_type ()));
}

/* Private GtkObject Methods :
 * 
 * gtk_notebook_destroy
 * gtk_notebook_set_arg
 * gtk_notebook_get_arg
 */
static void
gtk_notebook_destroy (GtkObject *object)
{
  GtkNotebook *notebook;
  
  g_return_if_fail (object != NULL);
  g_return_if_fail (GTK_IS_NOTEBOOK (object));

  notebook = GTK_NOTEBOOK (object);

  if (notebook->menu)
    gtk_notebook_popup_disable (notebook);

  GTK_OBJECT_CLASS (parent_class)->destroy (object);
}

static void
gtk_notebook_set_arg (GtkObject *object,
		      GtkArg    *arg,
		      guint      arg_id)
{
  GtkNotebook *notebook;

  notebook = GTK_NOTEBOOK (object);

  switch (arg_id)
    {
    case ARG_SHOW_TABS:
      gtk_notebook_set_show_tabs (notebook, GTK_VALUE_BOOL (*arg));
      break;
    case ARG_SHOW_BORDER:
      gtk_notebook_set_show_border (notebook, GTK_VALUE_BOOL (*arg));
      break;
    case ARG_SCROLLABLE:
      gtk_notebook_set_scrollable (notebook, GTK_VALUE_BOOL (*arg));
      break;
    case ARG_ENABLE_POPUP:
      if (GTK_VALUE_BOOL (*arg))
	gtk_notebook_popup_enable (notebook);
      else
	gtk_notebook_popup_disable (notebook);
      break;
    case ARG_HOMOGENEOUS:
      gtk_notebook_set_homogeneous_tabs (notebook, GTK_VALUE_BOOL (*arg));
      break;  
    case ARG_PAGE:
      gtk_notebook_set_page (notebook, GTK_VALUE_INT (*arg));
      break;
    case ARG_TAB_POS:
      gtk_notebook_set_tab_pos (notebook, GTK_VALUE_ENUM (*arg));
      break;
    case ARG_TAB_BORDER:
      gtk_notebook_set_tab_border (notebook, GTK_VALUE_UINT (*arg));
      break;
    case ARG_TAB_HBORDER:
      gtk_notebook_set_tab_hborder (notebook, GTK_VALUE_UINT (*arg));
      break;
    case ARG_TAB_VBORDER:
      gtk_notebook_set_tab_vborder (notebook, GTK_VALUE_UINT (*arg));
      break;
    default:
      break;
    }
}

static void
gtk_notebook_get_arg (GtkObject *object,
		      GtkArg    *arg,
		      guint      arg_id)
{
  GtkNotebook *notebook;

  notebook = GTK_NOTEBOOK (object);

  switch (arg_id)
    {
    case ARG_SHOW_TABS:
      GTK_VALUE_BOOL (*arg) = notebook->show_tabs;
      break;
    case ARG_SHOW_BORDER:
      GTK_VALUE_BOOL (*arg) = notebook->show_border;
      break;
    case ARG_SCROLLABLE:
      GTK_VALUE_BOOL (*arg) = notebook->scrollable;
      break;
    case ARG_ENABLE_POPUP:
      GTK_VALUE_BOOL (*arg) = notebook->menu != NULL;
      break;
    case ARG_HOMOGENEOUS:
      GTK_VALUE_BOOL (*arg) = notebook->homogeneous;
      break;
    case ARG_PAGE:
      GTK_VALUE_INT (*arg) = gtk_notebook_get_current_page (notebook);
      break;
    case ARG_TAB_POS:
      GTK_VALUE_ENUM (*arg) = notebook->tab_pos;
      break;
    case ARG_TAB_HBORDER:
      GTK_VALUE_UINT (*arg) = notebook->tab_hborder;
      break;
    case ARG_TAB_VBORDER:
      GTK_VALUE_UINT (*arg) = notebook->tab_vborder;