gtkwidget.h

windows平台下开发gtk程序所需要的库和头文件等

/* 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 Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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 1997-2000.  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/.
 */

#if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gtk/gtk.h> can be included directly."
#endif

#ifndef __GTK_WIDGET_H__
#define __GTK_WIDGET_H__

#include <gdk/gdk.h>
#include <gtk/gtkaccelgroup.h>
#include <gtk/gtkobject.h>
#include <gtk/gtkadjustment.h>
#include <gtk/gtkstyle.h>
#include <gtk/gtksettings.h>
#include <atk/atk.h>

G_BEGIN_DECLS

/* The flags that are used by GtkWidget on top of the
 * flags field of GtkObject.
 */
typedef enum
{
  GTK_TOPLEVEL         = 1 << 4,
  GTK_NO_WINDOW        = 1 << 5,
  GTK_REALIZED         = 1 << 6,
  GTK_MAPPED           = 1 << 7,
  GTK_VISIBLE          = 1 << 8,
  GTK_SENSITIVE        = 1 << 9,
  GTK_PARENT_SENSITIVE = 1 << 10,
  GTK_CAN_FOCUS        = 1 << 11,
  GTK_HAS_FOCUS        = 1 << 12,

  /* widget is allowed to receive the default via gtk_widget_grab_default
   * and will reserve space to draw the default if possible
   */
  GTK_CAN_DEFAULT      = 1 << 13,

  /* the widget currently is receiving the default action and should be drawn
   * appropriately if possible
   */
  GTK_HAS_DEFAULT      = 1 << 14,

  GTK_HAS_GRAB	       = 1 << 15,
  GTK_RC_STYLE	       = 1 << 16,
  GTK_COMPOSITE_CHILD  = 1 << 17,
  GTK_NO_REPARENT      = 1 << 18,
  GTK_APP_PAINTABLE    = 1 << 19,

  /* the widget when focused will receive the default action and have
   * HAS_DEFAULT set even if there is a different widget set as default
   */
  GTK_RECEIVES_DEFAULT = 1 << 20,

  GTK_DOUBLE_BUFFERED  = 1 << 21,
  GTK_NO_SHOW_ALL      = 1 << 22
} GtkWidgetFlags;

/* Kinds of widget-specific help */
typedef enum
{
  GTK_WIDGET_HELP_TOOLTIP,
  GTK_WIDGET_HELP_WHATS_THIS
} GtkWidgetHelpType;

/* Macro for casting a pointer to a GtkWidget or GtkWidgetClass pointer.
 * Macros for testing whether `widget' or `klass' are of type GTK_TYPE_WIDGET.
 */
#define GTK_TYPE_WIDGET			  (gtk_widget_get_type ())
#define GTK_WIDGET(widget)		  (G_TYPE_CHECK_INSTANCE_CAST ((widget), GTK_TYPE_WIDGET, GtkWidget))
#define GTK_WIDGET_CLASS(klass)		  (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_WIDGET, GtkWidgetClass))
#define GTK_IS_WIDGET(widget)		  (G_TYPE_CHECK_INSTANCE_TYPE ((widget), GTK_TYPE_WIDGET))
#define GTK_IS_WIDGET_CLASS(klass)	  (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_WIDGET))
#define GTK_WIDGET_GET_CLASS(obj)         (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_WIDGET, GtkWidgetClass))

/* Macros for extracting various fields from GtkWidget and GtkWidgetClass.
 */
#define GTK_WIDGET_TYPE(wid)		  (GTK_OBJECT_TYPE (wid))
#define GTK_WIDGET_STATE(wid)		  (GTK_WIDGET (wid)->state)
#define GTK_WIDGET_SAVED_STATE(wid)	  (GTK_WIDGET (wid)->saved_state)

/* Macros for extracting the widget flags from GtkWidget.
 */
#define GTK_WIDGET_FLAGS(wid)		  (GTK_OBJECT_FLAGS (wid))
#define GTK_WIDGET_TOPLEVEL(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)
#define GTK_WIDGET_NO_WINDOW(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)
#define GTK_WIDGET_REALIZED(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)
#define GTK_WIDGET_MAPPED(wid)		  ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)
#define GTK_WIDGET_VISIBLE(wid)		  ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)
#define GTK_WIDGET_DRAWABLE(wid)	  (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))
#define GTK_WIDGET_SENSITIVE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)
#define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)
#define GTK_WIDGET_IS_SENSITIVE(wid)	  (GTK_WIDGET_SENSITIVE (wid) && \
					   GTK_WIDGET_PARENT_SENSITIVE (wid))
#define GTK_WIDGET_CAN_FOCUS(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)
#define GTK_WIDGET_HAS_FOCUS(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)
#define GTK_WIDGET_CAN_DEFAULT(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)
#define GTK_WIDGET_HAS_DEFAULT(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)
#define GTK_WIDGET_HAS_GRAB(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)
#define GTK_WIDGET_RC_STYLE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)
#define GTK_WIDGET_COMPOSITE_CHILD(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)
#define GTK_WIDGET_APP_PAINTABLE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)
#define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)
#define GTK_WIDGET_DOUBLE_BUFFERED(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)
  
/* Macros for setting and clearing widget flags.
 */
#define GTK_WIDGET_SET_FLAGS(wid,flag)	  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END
#define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END

#define GTK_TYPE_REQUISITION              (gtk_requisition_get_type ())

/* forward declaration to avoid excessive includes (and concurrent includes)
 */
typedef struct _GtkRequisition	   GtkRequisition;
typedef 	GdkRectangle	   GtkAllocation;
typedef struct _GtkSelectionData   GtkSelectionData;
typedef struct _GtkWidgetClass	   GtkWidgetClass;
typedef struct _GtkWidgetAuxInfo   GtkWidgetAuxInfo;
typedef struct _GtkWidgetShapeInfo GtkWidgetShapeInfo;
typedef struct _GtkClipboard	   GtkClipboard;
typedef struct _GtkTooltip         GtkTooltip;
typedef struct _GtkWindow          GtkWindow;
typedef void     (*GtkCallback)        (GtkWidget        *widget,
					gpointer	  data);

/* A requisition is a desired amount of space which a
 *  widget may request.
 */
struct _GtkRequisition
{
  gint width;
  gint height;
};

/* The widget is the base of the tree for displayable objects.
 *  (A displayable object is one which takes up some amount
 *  of screen real estate). It provides a common base and interface
 *  which actual widgets must adhere to.
 */
struct _GtkWidget
{
  /* The object structure needs to be the first
   *  element in the widget structure in order for
   *  the object mechanism to work correctly. This
   *  allows a GtkWidget pointer to be cast to a
   *  GtkObject pointer.
   */
  GtkObject object;
  
  /* 16 bits of internally used private flags.
   * this will be packed into the same 4 byte alignment frame that
   * state and saved_state go. we therefore don't waste any new
   * space on this.
   */
  guint16 GSEAL (private_flags);
  
  /* The state of the widget. There are actually only
   *  5 widget states (defined in "gtkenums.h").
   */
  guint8 GSEAL (state);
  
  /* The saved state of the widget. When a widget's state
   *  is changed to GTK_STATE_INSENSITIVE via
   *  "gtk_widget_set_state" or "gtk_widget_set_sensitive"
   *  the old state is kept around in this field. The state
   *  will be restored once the widget gets sensitive again.
   */
  guint8 GSEAL (saved_state);
  
  /* The widget's name. If the widget does not have a name
   *  (the name is NULL), then its name (as returned by
   *  "gtk_widget_get_name") is its class's name.
   * Among other things, the widget name is used to determine
   *  the style to use for a widget.
   */
  gchar *GSEAL (name);
  
  /*< public >*/

  /* The style for the widget. The style contains the
   *  colors the widget should be drawn in for each state
   *  along with graphics contexts used to draw with and
   *  the font to use for text.
   */
  GtkStyle *GSEAL (style);
  
  /* The widget's desired size.
   */
  GtkRequisition GSEAL (requisition);
  
  /* The widget's allocated size.
   */
  GtkAllocation GSEAL (allocation);
  
  /* The widget's window or its parent window if it does
   *  not have a window. (Which will be indicated by the
   *  GTK_NO_WINDOW flag being set).
   */
  GdkWindow *GSEAL (window);
  
  /* The widget's parent.
   */
  GtkWidget *GSEAL (parent);
};

struct _GtkWidgetClass
{
  /* The object class structure needs to be the first
   *  element in the widget class structure in order for
   *  the class mechanism to work correctly. This allows a
   *  GtkWidgetClass pointer to be cast to a GtkObjectClass
   *  pointer.
   */
  GtkObjectClass parent_class;

  /*< public >*/
  
  guint activate_signal;

  guint set_scroll_adjustments_signal;

  /*< private >*/
  
  /* seldomly overidden */
  void (*dispatch_child_properties_changed) (GtkWidget   *widget,
					     guint        n_pspecs,
					     GParamSpec **pspecs);

  /* basics */
  void (* show)		       (GtkWidget        *widget);
  void (* show_all)            (GtkWidget        *widget);
  void (* hide)		       (GtkWidget        *widget);
  void (* hide_all)            (GtkWidget        *widget);
  void (* map)		       (GtkWidget        *widget);
  void (* unmap)	       (GtkWidget        *widget);
  void (* realize)	       (GtkWidget        *widget);
  void (* unrealize)	       (GtkWidget        *widget);
  void (* size_request)	       (GtkWidget        *widget,
				GtkRequisition   *requisition);
  void (* size_allocate)       (GtkWidget        *widget,
				GtkAllocation    *allocation);
  void (* state_changed)       (GtkWidget        *widget,
				GtkStateType   	  previous_state);
  void (* parent_set)	       (GtkWidget        *widget,
				GtkWidget        *previous_parent);
  void (* hierarchy_changed)   (GtkWidget        *widget,
				GtkWidget        *previous_toplevel);
  void (* style_set)	       (GtkWidget        *widget,
				GtkStyle         *previous_style);
  void (* direction_changed)   (GtkWidget        *widget,
				GtkTextDirection  previous_direction);
  void (* grab_notify)         (GtkWidget        *widget,
				gboolean          was_grabbed);
  void (* child_notify)        (GtkWidget	 *widget,
				GParamSpec       *pspec);
  
  /* Mnemonics */