gtkwindow.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 <string.h>
#include <limits.h>
#include "gdk/gdk.h"
#include "gdk/gdkkeysyms.h"
#include "gdk/gdkx.h"
#include "gtkprivate.h"
#include "gtkrc.h"
#include "gtksignal.h"
#include "gtkwindow.h"
#include "gtkbindings.h"
#include "gtkmain.h"

/* TODO: remove this define and assorted code in 1.3 and fix up the
 * real culprits.
 */
#define FIXME_ZVT_ME_HARDER

enum {
  SET_FOCUS,
  LAST_SIGNAL
};
enum {
  ARG_0,
  ARG_TYPE,
  ARG_TITLE,
  ARG_AUTO_SHRINK,
  ARG_ALLOW_SHRINK,
  ARG_ALLOW_GROW,
  ARG_MODAL,
  ARG_WIN_POS,
  ARG_DEFAULT_WIDTH,
  ARG_DEFAULT_HEIGHT
};

typedef struct {
  GdkGeometry    geometry; /* Last set of geometry hints we set */
  GdkWindowHints flags;
  gint           width;
  gint           height;
} GtkWindowLastGeometryInfo;

typedef struct {
  /* Properties that the app has set on the window
   */
  GdkGeometry    geometry;	/* Geometry hints */
  GdkWindowHints mask;
  GtkWidget     *widget;	/* subwidget to which hints apply */
  gint           width;		/* Default size */
  gint           height;

  GtkWindowLastGeometryInfo last;
} GtkWindowGeometryInfo;

static void gtk_window_class_init         (GtkWindowClass    *klass);
static void gtk_window_init               (GtkWindow         *window);
static void gtk_window_set_arg            (GtkObject         *object,
					   GtkArg            *arg,
					   guint	      arg_id);
static void gtk_window_get_arg            (GtkObject         *object,
					   GtkArg            *arg,
					   guint	      arg_id);
static void gtk_window_shutdown           (GtkObject         *object);
static void gtk_window_destroy            (GtkObject         *object);
static void gtk_window_finalize           (GtkObject         *object);
static void gtk_window_show               (GtkWidget         *widget);
static void gtk_window_hide               (GtkWidget         *widget);
static void gtk_window_map                (GtkWidget         *widget);
static void gtk_window_unmap              (GtkWidget         *widget);
static void gtk_window_realize            (GtkWidget         *widget);
static void gtk_window_size_request       (GtkWidget         *widget,
					   GtkRequisition    *requisition);
static void gtk_window_size_allocate      (GtkWidget         *widget,
					   GtkAllocation     *allocation);
static gint gtk_window_configure_event    (GtkWidget         *widget,
					   GdkEventConfigure *event);
static gint gtk_window_key_press_event    (GtkWidget         *widget,
					   GdkEventKey       *event);
static gint gtk_window_key_release_event  (GtkWidget         *widget,
					   GdkEventKey       *event);
static gint gtk_window_enter_notify_event (GtkWidget         *widget,
					   GdkEventCrossing  *event);
static gint gtk_window_leave_notify_event (GtkWidget         *widget,
					   GdkEventCrossing  *event);
static gint gtk_window_focus_in_event     (GtkWidget         *widget,
					   GdkEventFocus     *event);
static gint gtk_window_focus_out_event    (GtkWidget         *widget,
					   GdkEventFocus     *event);
static gint gtk_window_client_event	  (GtkWidget	     *widget,
					   GdkEventClient    *event);
static void gtk_window_check_resize       (GtkContainer      *container);
static void gtk_window_real_set_focus     (GtkWindow         *window,
					   GtkWidget         *focus);

static void gtk_window_move_resize        (GtkWindow         *window);
static gboolean gtk_window_compare_hints  (GdkGeometry       *geometry_a,
					   guint              flags_a,
					   GdkGeometry       *geometry_b,
					   guint              flags_b);
static void gtk_window_compute_default_size (GtkWindow       *window,
					     guint           *width,
					     guint           *height);
static void  gtk_window_constrain_size      (GtkWindow       *window,
					     GdkGeometry     *geometry,
					     guint            flags,
					     gint             width,
					     gint             height,
					     gint            *new_width,
					     gint            *new_height);
static void gtk_window_compute_hints      (GtkWindow         *window, 
					   GdkGeometry       *new_geometry,
					   guint             *new_flags);
static void gtk_window_compute_reposition (GtkWindow         *window,
					   gint               new_width,
					   gint               new_height,
					   gint              *x,
					   gint              *y);

static void gtk_window_read_rcfiles       (GtkWidget         *widget,
					   GdkEventClient    *event);
static void gtk_window_draw               (GtkWidget         *widget,
				           GdkRectangle      *area);
static void gtk_window_paint              (GtkWidget         *widget,
					   GdkRectangle      *area);
static gint gtk_window_expose             (GtkWidget         *widget,
				           GdkEventExpose    *event);
static void gtk_window_unset_transient_for         (GtkWindow  *window);
static void gtk_window_transient_parent_realized   (GtkWidget  *parent,
						    GtkWidget  *window);
static void gtk_window_transient_parent_unrealized (GtkWidget  *parent,
						    GtkWidget  *window);

static GtkWindowGeometryInfo* gtk_window_get_geometry_info (GtkWindow *window,
							    gboolean   create);
static void gtk_window_geometry_destroy  (GtkWindowGeometryInfo *info);

static GtkBinClass *parent_class = NULL;
static guint window_signals[LAST_SIGNAL] = { 0 };


GtkType
gtk_window_get_type (void)
{
  static GtkType window_type = 0;

  if (!window_type)
    {
      static const GtkTypeInfo window_info =
      {
	"GtkWindow",
	sizeof (GtkWindow),
	sizeof (GtkWindowClass),
	(GtkClassInitFunc) gtk_window_class_init,
	(GtkObjectInitFunc) gtk_window_init,
        /* reserved_1 */ NULL,
	/* reserved_2 */ NULL,
	(GtkClassInitFunc) NULL,
      };

      window_type = gtk_type_unique (gtk_bin_get_type (), &window_info);
    }

  return window_type;
}

static void
gtk_window_class_init (GtkWindowClass *klass)
{
  GtkObjectClass *object_class;
  GtkWidgetClass *widget_class;
  GtkContainerClass *container_class;

  object_class = (GtkObjectClass*) klass;
  widget_class = (GtkWidgetClass*) klass;
  container_class = (GtkContainerClass*) klass;

  parent_class = gtk_type_class (gtk_bin_get_type ());

  gtk_object_add_arg_type ("GtkWindow::type", GTK_TYPE_WINDOW_TYPE, GTK_ARG_READWRITE, ARG_TYPE);
  gtk_object_add_arg_type ("GtkWindow::title", GTK_TYPE_STRING, GTK_ARG_READWRITE, ARG_TITLE);
  gtk_object_add_arg_type ("GtkWindow::auto_shrink", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_AUTO_SHRINK);
  gtk_object_add_arg_type ("GtkWindow::allow_shrink", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_ALLOW_SHRINK);
  gtk_object_add_arg_type ("GtkWindow::allow_grow", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_ALLOW_GROW);
  gtk_object_add_arg_type ("GtkWindow::modal", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_MODAL);
  gtk_object_add_arg_type ("GtkWindow::window_position", GTK_TYPE_WINDOW_POSITION, GTK_ARG_READWRITE, ARG_WIN_POS);
  gtk_object_add_arg_type ("GtkWindow::default_width", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_DEFAULT_WIDTH);
  gtk_object_add_arg_type ("GtkWindow::default_height", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_DEFAULT_HEIGHT);
  
  window_signals[SET_FOCUS] =
    gtk_signal_new ("set_focus",
                    GTK_RUN_LAST,
                    object_class->type,
                    GTK_SIGNAL_OFFSET (GtkWindowClass, set_focus),
                    gtk_marshal_NONE__POINTER,
		    GTK_TYPE_NONE, 1,
                    GTK_TYPE_WIDGET);

  gtk_object_class_add_signals (object_class, window_signals, LAST_SIGNAL);

  object_class->set_arg = gtk_window_set_arg;
  object_class->get_arg = gtk_window_get_arg;
  object_class->shutdown = gtk_window_shutdown;
  object_class->destroy = gtk_window_destroy;
  object_class->finalize = gtk_window_finalize;

  widget_class->show = gtk_window_show;
  widget_class->hide = gtk_window_hide;
  widget_class->map = gtk_window_map;
  widget_class->unmap = gtk_window_unmap;
  widget_class->realize = gtk_window_realize;
  widget_class->size_request = gtk_window_size_request;
  widget_class->size_allocate = gtk_window_size_allocate;
  widget_class->configure_event = gtk_window_configure_event;
  widget_class->key_press_event = gtk_window_key_press_event;
  widget_class->key_release_event = gtk_window_key_release_event;
  widget_class->enter_notify_event = gtk_window_enter_notify_event;
  widget_class->leave_notify_event = gtk_window_leave_notify_event;
  widget_class->focus_in_event = gtk_window_focus_in_event;
  widget_class->focus_out_event = gtk_window_focus_out_event;
  widget_class->client_event = gtk_window_client_event;

  widget_class->draw = gtk_window_draw;
  widget_class->expose_event = gtk_window_expose;
   
  container_class->check_resize = gtk_window_check_resize;

  klass->set_focus = gtk_window_real_set_focus;
}

static void
gtk_window_init (GtkWindow *window)
{
  GTK_WIDGET_UNSET_FLAGS (window, GTK_NO_WINDOW);
  GTK_WIDGET_SET_FLAGS (window, GTK_TOPLEVEL);

  gtk_container_set_resize_mode (GTK_CONTAINER (window), GTK_RESIZE_QUEUE);

  window->title = NULL;
  window->wmclass_name = g_strdup (g_get_prgname ());
  window->wmclass_class = g_strdup (gdk_progclass);
  window->type = GTK_WINDOW_TOPLEVEL;
  window->focus_widget = NULL;
  window->default_widget = NULL;
  window->resize_count = 0;
  window->allow_shrink = FALSE;
  window->allow_grow = TRUE;
  window->auto_shrink = FALSE;
  window->handling_resize = FALSE;
  window->position = GTK_WIN_POS_NONE;
  window->use_uposition = TRUE;
  window->modal = FALSE;
  
  gtk_container_register_toplevel (GTK_CONTAINER (window));
}

static void
gtk_window_set_arg (GtkObject  *object,
		    GtkArg     *arg,
		    guint	arg_id)
{
  GtkWindow  *window;

  window = GTK_WINDOW (object);

  switch (arg_id)
    {
    case ARG_TYPE:
      window->type = GTK_VALUE_ENUM (*arg);
      break;
    case ARG_TITLE:
      gtk_window_set_title (window, GTK_VALUE_STRING (*arg));
      break;
    case ARG_AUTO_SHRINK:
      window->auto_shrink = (GTK_VALUE_BOOL (*arg) != FALSE);
      gtk_widget_queue_resize (GTK_WIDGET (window));
      break;
    case ARG_ALLOW_SHRINK:
      window->allow_shrink = (GTK_VALUE_BOOL (*arg) != FALSE);
      gtk_widget_queue_resize (GTK_WIDGET (window));
      break;
    case ARG_ALLOW_GROW:
      window->allow_grow = (GTK_VALUE_BOOL (*arg) != FALSE);
      gtk_widget_queue_resize (GTK_WIDGET (window));
      break;
    case ARG_MODAL:
      gtk_window_set_modal (window, GTK_VALUE_BOOL (*arg));
      break;
    case ARG_WIN_POS:
      gtk_window_set_position (window, GTK_VALUE_ENUM (*arg));
      break;
    case ARG_DEFAULT_WIDTH:
      gtk_window_set_default_size (window, GTK_VALUE_INT (*arg), -2);
      break;
    case ARG_DEFAULT_HEIGHT:
      gtk_window_set_default_size (window, -2, GTK_VALUE_INT (*arg));
      break;
    default:
      break;
    }
}

static void
gtk_window_get_arg (GtkObject  *object,
		    GtkArg     *arg,
		    guint	arg_id)
{
  GtkWindow  *window;

  window = GTK_WINDOW (object);

  switch (arg_id)
    {
      GtkWindowGeometryInfo *info;
    case ARG_TYPE:
      GTK_VALUE_ENUM (*arg) = window->type;
      break;
    case ARG_TITLE:
      GTK_VALUE_STRING (*arg) = g_strdup (window->title);
      break;
    case ARG_AUTO_SHRINK:
      GTK_VALUE_BOOL (*arg) = window->auto_shrink;
      break;
    case ARG_ALLOW_SHRINK:
      GTK_VALUE_BOOL (*arg) = window->allow_shrink;
      break;
    case ARG_ALLOW_GROW:
      GTK_VALUE_BOOL (*arg) = window->allow_grow;
      break;
    case ARG_MODAL:
      GTK_VALUE_BOOL (*arg) = window->modal;
      break;
    case ARG_WIN_POS:
      GTK_VALUE_ENUM (*arg) = window->position;
      break;
    case ARG_DEFAULT_WIDTH:
      info = gtk_window_get_geometry_info (window, FALSE);
      if (!info)
	GTK_VALUE_INT (*arg) = -1;
      else
	GTK_VALUE_INT (*arg) = info->width;
      break;
    case ARG_DEFAULT_HEIGHT:
      info = gtk_window_get_geometry_info (window, FALSE);
      if (!info)
	GTK_VALUE_INT (*arg) = -1;
      else
	GTK_VALUE_INT (*arg) = info->height;
      break;
    default:
      arg->type = GTK_TYPE_INVALID;
      break;
    }
}

GtkWidget*
gtk_window_new (GtkWindowType type)
{
  GtkWindow *window;

  g_return_val_if_fail (type >= GTK_WINDOW_TOPLEVEL && type <= GTK_WINDOW_POPUP, NULL);

  window = gtk_type_new (GTK_TYPE_WINDOW);

  window->type = type;

  return GTK_WIDGET (window);
}

void
gtk_window_set_title (GtkWindow   *window,
		      const gchar *title)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));

  if (window->title)
    g_free (window->title);
  window->title = g_strdup (title);

  if (GTK_WIDGET_REALIZED (window))
    gdk_window_set_title (GTK_WIDGET (window)->window, window->title);
}

void
gtk_window_set_wmclass (GtkWindow *window,
			const gchar *wmclass_name,
			const gchar *wmclass_class)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));

  g_free (window->wmclass_name);
  window->wmclass_name = g_strdup (wmclass_name);

  g_free (window->wmclass_class);
  window->wmclass_class = g_strdup (wmclass_class);

  if (GTK_WIDGET_REALIZED (window))
    g_warning ("shouldn't set wmclass after window is realized!\n");
}

void
gtk_window_set_focus (GtkWindow *window,
		      GtkWidget *focus)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));
  if (focus)
    {
      g_return_if_fail (GTK_IS_WIDGET (focus));
      g_return_if_fail (GTK_WIDGET_CAN_FOCUS (focus));
    }

  if ((window->focus_widget != focus) ||
      (focus && !GTK_WIDGET_HAS_FOCUS (focus)))
    gtk_signal_emit (GTK_OBJECT (window), window_signals[SET_FOCUS], focus);
}

void
gtk_window_set_default (GtkWindow *window,
			GtkWidget *default_widget)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));

  if (default_widget)
    g_return_if_fail (GTK_WIDGET_CAN_DEFAULT (default_widget));

  if (window->default_widget != default_widget)
    {
      if (window->default_widget)
	{
	  GTK_WIDGET_UNSET_FLAGS (window->default_widget, GTK_HAS_DEFAULT);
	  gtk_widget_draw_default (window->default_widget);
	}

      window->default_widget = default_widget;

      if (window->default_widget)
	{
	  GTK_WIDGET_SET_FLAGS (window->default_widget, GTK_HAS_DEFAULT);
	  gtk_widget_draw_default (window->default_widget);
	}
    }
}

void
gtk_window_set_policy (GtkWindow *window,
		       gint       allow_shrink,
		       gint       allow_grow,
		       gint       auto_shrink)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));

  window->allow_shrink = (allow_shrink != FALSE);
  window->allow_grow = (allow_grow != FALSE);
  window->auto_shrink = (auto_shrink != FALSE);

  gtk_widget_queue_resize (GTK_WIDGET (window));
}

void
gtk_window_add_accel_group (GtkWindow        *window,
			    GtkAccelGroup    *accel_group)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (accel_group != NULL);

  gtk_accel_group_attach (accel_group, GTK_OBJECT (window));
}

void
gtk_window_remove_accel_group (GtkWindow       *window,
			       GtkAccelGroup   *accel_group)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (accel_group != NULL);

  gtk_accel_group_detach (accel_group, GTK_OBJECT (window));
}

void
gtk_window_set_position (GtkWindow         *window,
			 GtkWindowPosition  position)
{
  g_return_if_fail (window != NULL);
  g_return_if_fail (GTK_IS_WINDOW (window));

  window->position = position;
}

gint
gtk_window_activate_focus (GtkWindow      *window)
{
  g_return_val_if_fail (window != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  if (window->focus_widget)
    {
      gtk_widget_activate (window->focus_widget);
      return TRUE;
    }

  return FALSE;
}