gtkclist.c 85.5 KB
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/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball, Josh MacDonald, 
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 * Copyright (C) 1997-1998 Jay Painter <jpaint@serv.net><jpaint@gimp.org>  
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 *
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 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <stdlib.h>
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#include "../config.h"
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#include "gtkclist.h"

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/* the number rows memchunk expands at a time */
#define CLIST_OPTIMUM_SIZE 512

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/* the width of the column resize windows */
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#define DRAG_WIDTH  6
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/* minimum allowed width of a column */
#define COLUMN_MIN_WIDTH 5

/* this defigns the base grid spacing */
#define CELL_SPACING 1

/* added the horizontal space at the beginning and end of a row*/
#define COLUMN_INSET 3

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/* scrollbar spacing class macro */
#define SCROLLBAR_SPACING(w) (GTK_CLIST_CLASS (GTK_OBJECT (w)->klass)->scrollbar_spacing)
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/* gives the top pixel of the given row in context of
 * the clist's voffset */
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#define ROW_TOP_YPIXEL(clist, row) (((clist)->row_height * (row)) + \
				    (((row) + 1) * CELL_SPACING) + \
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				    (clist)->voffset)

/* returns the row index from a y pixel location in the 
 * context of the clist's voffset */
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#define ROW_FROM_YPIXEL(clist, y)  (((y) - (clist)->voffset) / \
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				    ((clist)->row_height + CELL_SPACING))

/* gives the left pixel of the given column in context of
 * the clist's hoffset */
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#define COLUMN_LEFT_XPIXEL(clist, column)  ((clist)->column[(column)].area.x + \
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					    (clist)->hoffset)

/* returns the column index from a x pixel location in the 
 * context of the clist's hoffset */
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static inline gint
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COLUMN_FROM_XPIXEL (GtkCList * clist,
		    gint x)
{
  gint i, cx;

  for (i = 0; i < clist->columns; i++)
    {
      cx = clist->column[i].area.x + clist->hoffset;

      if (x >= (cx - (COLUMN_INSET + CELL_SPACING)) &&
	  x <= (cx + clist->column[i].area.width + COLUMN_INSET))
	return i;
    }

  /* no match */
  return -1;
}

/* returns the top pixel of the given row in the context of
 * the list height */
#define ROW_TOP(clist, row)        (((clist)->row_height + CELL_SPACING) * (row))

/* returns the left pixel of the given column in the context of
 * the list width */
#define COLUMN_LEFT(clist, column) ((clist)->column[(column)].area.x)

/* returns the total height of the list */
#define LIST_HEIGHT(clist)         (((clist)->row_height * ((clist)->rows)) + \
				    (CELL_SPACING * ((clist)->rows + 1)))

/* returns the total width of the list */
#define LIST_WIDTH(clist)          ((clist)->column[(clist)->columns - 1].area.x + \
				    (clist)->column[(clist)->columns - 1].area.width + \
				    COLUMN_INSET + CELL_SPACING)


/* Signals */
enum
{
  SELECT_ROW,
  UNSELECT_ROW,
  CLICK_COLUMN,
  LAST_SIGNAL
};

typedef void (*GtkCListSignal1) (GtkObject * object,
				 gint arg1,
				 gint arg2,
				 GdkEventButton * arg3,
				 gpointer data);

typedef void (*GtkCListSignal2) (GtkObject * object,
				 gint arg1,
				 gpointer data);


/* GtkCList Methods */
static void gtk_clist_class_init (GtkCListClass * klass);
static void gtk_clist_init (GtkCList * clist);

/* GtkObject Methods */
static void gtk_clist_destroy (GtkObject * object);
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static void gtk_clist_finalize (GtkObject * object);
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/* GtkWidget Methods */
static void gtk_clist_realize (GtkWidget * widget);
static void gtk_clist_unrealize (GtkWidget * widget);
static void gtk_clist_map (GtkWidget * widget);
static void gtk_clist_unmap (GtkWidget * widget);
static void gtk_clist_draw (GtkWidget * widget,
			    GdkRectangle * area);
static gint gtk_clist_expose (GtkWidget * widget,
			      GdkEventExpose * event);
static gint gtk_clist_button_press (GtkWidget * widget,
				    GdkEventButton * event);
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static gint gtk_clist_button_release (GtkWidget * widget,
				      GdkEventButton * event);
static gint gtk_clist_motion (GtkWidget * widget, 
			      GdkEventMotion * event);
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static void gtk_clist_size_request (GtkWidget * widget,
				    GtkRequisition * requisition);
static void gtk_clist_size_allocate (GtkWidget * widget,
				     GtkAllocation * allocation);

/* GtkContainer Methods */
static void gtk_clist_foreach (GtkContainer * container,
			       GtkCallback callback,
			       gpointer callback_data);

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/* Drawing */
static void draw_row (GtkCList * clist,
		      GdkRectangle * area,
		      gint row,
		      GtkCListRow * clist_row);
static void draw_rows (GtkCList * clist,
		       GdkRectangle * area);

/* Size Allocation */
static void size_allocate_title_buttons (GtkCList * clist);
static void size_allocate_columns (GtkCList * clist);

/* Selection */
static void real_select_row (GtkCList * clist,
			     gint row,
			     gint column,
			     GdkEventButton * event);
static void real_unselect_row (GtkCList * clist,
			       gint row,
			       gint column,
			       GdkEventButton * event);
static gint get_selection_info (GtkCList * clist,
				gint x,
				gint y,
				gint * row,
				gint * column);

/* Resize Columns */
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static void draw_xor_line (GtkCList * clist);
static gint new_column_width (GtkCList * clist,
			      gint column,
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			      gint * x,
			      gint * visible);
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static void resize_column (GtkCList * clist,
			   gint column,
			   gint width);
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/* Buttons */
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static void column_button_create (GtkCList * clist,
				  gint column);
static void column_button_clicked (GtkWidget * widget,
				   gpointer data);
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/* Scrollbars */
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static void create_scrollbars (GtkCList * clist);
static void adjust_scrollbars (GtkCList * clist);
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static void check_exposures   (GtkCList * clist);
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static void vadjustment_changed (GtkAdjustment * adjustment,
				 gpointer data);
static void vadjustment_value_changed (GtkAdjustment * adjustment,
				       gpointer data);
static void hadjustment_changed (GtkAdjustment * adjustment,
				 gpointer data);
static void hadjustment_value_changed (GtkAdjustment * adjustment,
				       gpointer data);
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/* Memory Allocation/Distruction Routines */
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static GtkCListColumn *columns_new (GtkCList * clist);
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static void column_title_new (GtkCList * clist,
			      gint column,
			      gchar * title);
static void columns_delete (GtkCList * clist);
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static GtkCListRow *row_new (GtkCList * clist);
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static void row_delete (GtkCList * clist,
			GtkCListRow * clist_row);
static void cell_empty (GtkCList * clist,
			GtkCListRow * clist_row,
			gint column);
static void cell_set_text (GtkCList * clist,
			   GtkCListRow * clist_row,
			   gint column,
			   gchar * text);
static void cell_set_pixmap (GtkCList * clist,
			     GtkCListRow * clist_row,
			     gint column,
			     GdkPixmap * pixmap,
			     GdkBitmap * mask);
static void cell_set_pixtext (GtkCList * clist,
			      GtkCListRow * clist_row,
			      gint column,
			      gchar * text,
			      guint8 spacing,
			      GdkPixmap * pixmap,
			      GdkBitmap * mask);
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/* Signals */
static void gtk_clist_marshal_signal_1 (GtkObject * object,
					GtkSignalFunc func,
					gpointer func_data,
					GtkArg * args);
static void gtk_clist_marshal_signal_2 (GtkObject * object,
					GtkSignalFunc func,
					gpointer func_data,
					GtkArg * args);

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/* Fill in data after widget is realized and has style */

static void add_style_data (GtkCList * clist);

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static GtkContainerClass *parent_class = NULL;
static gint clist_signals[LAST_SIGNAL] = {0};


guint
gtk_clist_get_type ()
{
  static guint clist_type = 0;

  if (!clist_type)
    {
      GtkTypeInfo clist_info =
      {
	"GtkCList",
	sizeof (GtkCList),
	sizeof (GtkCListClass),
	(GtkClassInitFunc) gtk_clist_class_init,
	(GtkObjectInitFunc) gtk_clist_init,
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	(GtkArgSetFunc) NULL,
        (GtkArgGetFunc) NULL,
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      };

      clist_type = gtk_type_unique (gtk_container_get_type (), &clist_info);
    }

  return clist_type;
}

static void
gtk_clist_class_init (GtkCListClass * 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_container_get_type ());

  clist_signals[SELECT_ROW] =
    gtk_signal_new ("select_row",
		    GTK_RUN_LAST,
		    object_class->type,
		    GTK_SIGNAL_OFFSET (GtkCListClass, select_row),
		    gtk_clist_marshal_signal_1,
	    GTK_TYPE_NONE, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_POINTER);
  clist_signals[UNSELECT_ROW] =
    gtk_signal_new ("unselect_row",
		    GTK_RUN_LAST,
		    object_class->type,
		    GTK_SIGNAL_OFFSET (GtkCListClass, unselect_row),
		    gtk_clist_marshal_signal_1,
	    GTK_TYPE_NONE, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_POINTER);
  clist_signals[CLICK_COLUMN] =
    gtk_signal_new ("click_column",
		    GTK_RUN_LAST,
		    object_class->type,
		    GTK_SIGNAL_OFFSET (GtkCListClass, click_column),
		    gtk_clist_marshal_signal_2,
		    GTK_TYPE_NONE, 1, GTK_TYPE_INT);

  gtk_object_class_add_signals (object_class, clist_signals, LAST_SIGNAL);

  object_class->destroy = gtk_clist_destroy;
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  object_class->finalize = gtk_clist_finalize;
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  widget_class->realize = gtk_clist_realize;
  widget_class->unrealize = gtk_clist_unrealize;
  widget_class->map = gtk_clist_map;
  widget_class->unmap = gtk_clist_unmap;
  widget_class->draw = gtk_clist_draw;
  widget_class->button_press_event = gtk_clist_button_press;
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  widget_class->button_release_event = gtk_clist_button_release;
  widget_class->motion_notify_event = gtk_clist_motion;
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  widget_class->expose_event = gtk_clist_expose;
  widget_class->size_request = gtk_clist_size_request;
  widget_class->size_allocate = gtk_clist_size_allocate;

  container_class->add = NULL;
  container_class->remove = NULL;
  container_class->foreach = gtk_clist_foreach;

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  klass->select_row = real_select_row;
  klass->unselect_row = real_unselect_row;
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  klass->click_column = NULL;
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  klass->scrollbar_spacing = 5;
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}

static void
gtk_clist_marshal_signal_1 (GtkObject * object,
			    GtkSignalFunc func,
			    gpointer func_data,
			    GtkArg * args)
{
  GtkCListSignal1 rfunc;

  rfunc = (GtkCListSignal1) func;

  (*rfunc) (object, GTK_VALUE_INT (args[0]),
	    GTK_VALUE_INT (args[1]),
	    GTK_VALUE_POINTER (args[2]),
	    func_data);
}

static void
gtk_clist_marshal_signal_2 (GtkObject * object,
			    GtkSignalFunc func,
			    gpointer func_data,
			    GtkArg * args)
{
  GtkCListSignal2 rfunc;

  rfunc = (GtkCListSignal2) func;

  (*rfunc) (object, GTK_VALUE_INT (args[0]),
	    func_data);
}

static void
gtk_clist_init (GtkCList * clist)
{
  clist->flags = 0;

  GTK_WIDGET_UNSET_FLAGS (clist, GTK_NO_WINDOW);
  GTK_CLIST_SET_FLAGS (clist, CLIST_FROZEN);

  clist->rows = 0;
  clist->row_center_offset = 0;
  clist->row_height = 0;
  clist->row_list = NULL;
  clist->row_list_end = NULL;

  clist->columns = 0;

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  clist->title_window = NULL;
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  clist->column_title_area.x = 0;
  clist->column_title_area.y = 0;
  clist->column_title_area.width = 0;
  clist->column_title_area.height = 0;

  clist->clist_window = NULL;
  clist->clist_window_width = 0;
  clist->clist_window_height = 0;

  clist->hoffset = 0;
  clist->voffset = 0;

  clist->shadow_type = GTK_SHADOW_IN;
  clist->hscrollbar_policy = GTK_POLICY_ALWAYS;
  clist->vscrollbar_policy = GTK_POLICY_ALWAYS;

  clist->cursor_drag = NULL;
  clist->xor_gc = NULL;
  clist->fg_gc = NULL;
  clist->bg_gc = NULL;
  clist->x_drag = 0;

  clist->selection_mode = GTK_SELECTION_SINGLE;
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  clist->selection = NULL;
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}

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/*
 * GTKCLIST PUBLIC INTERFACE
 *   gtk_clist_new_with_titles
 *   gtk_clist_new
 */
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GtkWidget *
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gtk_clist_new_with_titles (int columns,
			   gchar * titles[])
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{
  int i;
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  GtkWidget *widget;
  GtkCList *clist;

  if (titles == NULL)
    return NULL;

  widget = gtk_clist_new (columns);
  if (!widget)
    return NULL;
  else
    clist = GTK_CLIST (widget);

  /* set column titles */
  GTK_CLIST_SET_FLAGS (clist, CLIST_SHOW_TITLES);
  for (i = 0; i < columns; i++)
    {
      gtk_clist_set_column_title (clist, i, titles[i]);
    }

  return widget;
}

GtkWidget *
gtk_clist_new (int columns)
{
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  GtkCList *clist;

  /* sanity check */
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  if (columns < 1)
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    return NULL;

  clist = gtk_type_new (gtk_clist_get_type ());
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  GTK_CLIST_UNSET_FLAGS (clist, CLIST_SHOW_TITLES);
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  /* initalize memory chunks */
  clist->row_mem_chunk = g_mem_chunk_new ("clist row mem chunk",
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					  sizeof (GtkCListRow),
					  sizeof (GtkCListRow) * CLIST_OPTIMUM_SIZE, 
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					  G_ALLOC_AND_FREE);
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  clist->cell_mem_chunk = g_mem_chunk_new ("clist cell mem chunk",
					   sizeof (GtkCell) * columns,
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					   sizeof (GtkCell) * columns * CLIST_OPTIMUM_SIZE, 
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					   G_ALLOC_AND_FREE);
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  /* set number of columns, allocate memory */
  clist->columns = columns;
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  clist->column = columns_new (clist);
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  /* there needs to be at least one column button 
   * because there is alot of code that will break if it
   * isn't there*/
  column_button_create (clist, 0);
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  /* create scrollbars */
  create_scrollbars (clist);
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  return GTK_WIDGET (clist);
}

void
gtk_clist_set_border (GtkCList * clist,
		      GtkShadowType border)
{
  g_return_if_fail (clist != NULL);

  clist->shadow_type = border;

  if (GTK_WIDGET_VISIBLE (clist))
    gtk_widget_queue_resize (GTK_WIDGET (clist));
}

void
gtk_clist_set_selection_mode (GtkCList * clist,
			      GtkSelectionMode mode)
{
  g_return_if_fail (clist != NULL);

  clist->selection_mode = mode;
}

void
gtk_clist_freeze (GtkCList * clist)
{
  g_return_if_fail (clist != NULL);

  GTK_CLIST_SET_FLAGS (clist, CLIST_FROZEN);
}

void
gtk_clist_thaw (GtkCList * clist)
{
  g_return_if_fail (clist != NULL);

  GTK_CLIST_UNSET_FLAGS (clist, CLIST_FROZEN);

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  adjust_scrollbars (clist);
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  draw_rows (clist, NULL);
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}

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void
gtk_clist_column_titles_show (GtkCList * clist)
{
  g_return_if_fail (clist != NULL);

  if (!GTK_CLIST_SHOW_TITLES (clist))
    {
      GTK_CLIST_SET_FLAGS (clist, CLIST_SHOW_TITLES);
      gdk_window_show (clist->title_window);
      gtk_widget_queue_resize (GTK_WIDGET (clist));
    }
}

void 
gtk_clist_column_titles_hide (GtkCList * clist)
{
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  g_return_if_fail (clist != NULL);

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  if (GTK_CLIST_SHOW_TITLES (clist))
    {
      GTK_CLIST_UNSET_FLAGS (clist, CLIST_SHOW_TITLES);
      gdk_window_hide (clist->title_window);
      gtk_widget_queue_resize (GTK_WIDGET (clist));
    }
}
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void
gtk_clist_column_title_active (GtkCList * clist,
			       gint column)
{
  g_return_if_fail (clist != NULL);

  if (column < 0 || column >= clist->columns)
    return;

  if (!GTK_WIDGET_SENSITIVE (clist->column[column].button) ||
      !GTK_WIDGET_CAN_FOCUS (clist->column[column].button))
    {
      GTK_WIDGET_SET_FLAGS (clist->column[column].button, GTK_SENSITIVE | GTK_CAN_FOCUS);
      if (GTK_WIDGET_VISIBLE (clist))
	gtk_widget_queue_draw (clist->column[column].button);
    }
}

void
gtk_clist_column_title_passive (GtkCList * clist,
				gint column)
{
  g_return_if_fail (clist != NULL);

  if (column < 0 || column >= clist->columns)
    return;

  if (GTK_WIDGET_SENSITIVE (clist->column[column].button) ||
      GTK_WIDGET_CAN_FOCUS (clist->column[column].button))
    {
      GTK_WIDGET_UNSET_FLAGS (clist->column[column].button, GTK_SENSITIVE | GTK_CAN_FOCUS);
      if (GTK_WIDGET_VISIBLE (clist))
	gtk_widget_queue_draw (clist->column[column].button);
    }
}

void
gtk_clist_column_titles_active (GtkCList * clist)
{
  gint i;

  g_return_if_fail (clist != NULL);

  for (i = 0; i < clist->columns; i++)
    if (clist->column[i].button)
      gtk_clist_column_title_active (clist, i);
}

void
gtk_clist_column_titles_passive (GtkCList * clist)
{
  gint i;

  g_return_if_fail (clist != NULL);

  for (i = 0; i < clist->columns; i++)
    if (clist->column[i].button)
      gtk_clist_column_title_passive (clist, i);
}

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void
gtk_clist_set_column_title (GtkCList * clist,
			    gint column,
			    gchar * title)
{
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  gint new_button = 0;
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  GtkWidget *old_widget;
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  GtkWidget *alignment = NULL;
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  GtkWidget *label;

  g_return_if_fail (clist != NULL);

  if (column < 0 || column >= clist->columns)
    return;

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  /* if the column button doesn't currently exist,
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   * it has to be created first */
  if (!clist->column[column].button)
    {
      column_button_create (clist, column);
      new_button = 1;
    }

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  column_title_new (clist, column, title);
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  /* remove and destroy the old widget */
  old_widget = GTK_BUTTON (clist->column[column].button)->child;
  if (old_widget)
    {
      gtk_container_remove (GTK_CONTAINER (clist->column[column].button), old_widget);
      gtk_widget_destroy (old_widget);
    }

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  /* create new alignment based no column justification */
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  switch (clist->column[column].justification)
    {
    case GTK_JUSTIFY_LEFT:
      alignment = gtk_alignment_new (0.0, 0.5, 0.0, 0.0);
      break;

    case GTK_JUSTIFY_RIGHT:
      alignment = gtk_alignment_new (1.0, 0.5, 0.0, 0.0);
      break;

    case GTK_JUSTIFY_CENTER:
      alignment = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
      break;

    case GTK_JUSTIFY_FILL:
      alignment = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
      break;
    }

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  label = gtk_label_new (clist->column[column].title);
  gtk_container_add (GTK_CONTAINER (alignment), label);
  gtk_container_add (GTK_CONTAINER (clist->column[column].button), alignment);
  gtk_widget_show (label);
  gtk_widget_show (alignment);

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  /* if this button didn't previously exist, then the
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   * column button positions have to be re-computed */
  if (GTK_WIDGET_VISIBLE (clist) && new_button)
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    size_allocate_title_buttons (clist);
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}

void
gtk_clist_set_column_widget (GtkCList * clist,
			     gint column,
			     GtkWidget * widget)
{
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  gint new_button = 0;
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  GtkWidget *old_widget;

  g_return_if_fail (clist != NULL);

  if (column < 0 || column >= clist->columns)
    return;

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  /* if the column button doesn't currently exist,
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   * it has to be created first */
  if (!clist->column[column].button)
    {
      column_button_create (clist, column);
      new_button = 1;
    }

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  column_title_new (clist, column, NULL);
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  /* remove and destroy the old widget */
  old_widget = GTK_BUTTON (clist->column[column].button)->child;
  if (old_widget)
    {
      gtk_container_remove (GTK_CONTAINER (clist->column[column].button), old_widget);
      gtk_widget_destroy (old_widget);
    }

  /* add and show the widget */
  if (widget)
    {
      gtk_container_add (GTK_CONTAINER (clist->column[column].button), widget);
      gtk_widget_show (widget);
    }
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  /* if this button didn't previously exist, then the
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   * column button positions have to be re-computed */
  if (GTK_WIDGET_VISIBLE (clist) && new_button)
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    size_allocate_title_buttons (clist);
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}

void
gtk_clist_set_column_justification (GtkCList * clist,
				    gint column,
				    GtkJustification justification)
{
  GtkWidget *alignment;

  g_return_if_fail (clist != NULL);

  if (column < 0 || column >= clist->columns)
    return;

  clist->column[column].justification = justification;

  /* change the alinment of the button title if it's not a
   * custom widget */
  if (clist->column[column].title)
    {
      alignment = GTK_BUTTON (clist->column[column].button)->child;

      switch (clist->column[column].justification)
	{
	case GTK_JUSTIFY_LEFT:
	  gtk_alignment_set (GTK_ALIGNMENT (alignment), 0.0, 0.5, 0.0, 0.0);
	  break;

	case GTK_JUSTIFY_RIGHT:
	  gtk_alignment_set (GTK_ALIGNMENT (alignment), 1.0, 0.5, 0.0, 0.0);
	  break;

	case GTK_JUSTIFY_CENTER:
	  gtk_alignment_set (GTK_ALIGNMENT (alignment), 0.5, 0.5, 0.0, 0.0);
	  break;

	case GTK_JUSTIFY_FILL:
	  gtk_alignment_set (GTK_ALIGNMENT (alignment), 0.5, 0.5, 0.0, 0.0);
	  break;

	default:
	  break;
	}
    }

  if (!GTK_CLIST_FROZEN (clist))
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    draw_rows (clist, NULL);
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}

void
gtk_clist_set_column_width (GtkCList * clist,
			    gint column,
			    gint width)
{
  g_return_if_fail (clist != NULL);

  if (column < 0 || column >= clist->columns)
    return;

  clist->column[column].width = width;
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  clist->column[column].width_set = TRUE;
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  /* FIXME: this is quite expensive to do if the widget hasn't
   *        been size_allocated yet, and pointless. Should
   *        a flag be kept
   */
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  size_allocate_columns (clist);
  size_allocate_title_buttons (clist);
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  if (!GTK_CLIST_FROZEN (clist))
    {
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      adjust_scrollbars (clist);
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      draw_rows (clist, NULL);
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    }
}

void
gtk_clist_set_row_height (GtkCList * clist,
			  gint height)
{
  gint text_height;

  g_return_if_fail (clist != NULL);

  if (height > 0)
    clist->row_height = height;
  else
    return;

  GTK_CLIST_SET_FLAGS (clist, CLIST_ROW_HEIGHT_SET);
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  if (GTK_WIDGET_REALIZED (clist))
    {
      text_height = height - (GTK_WIDGET (clist)->style->font->ascent +
			      GTK_WIDGET (clist) ->style->font->descent + 1);
      clist->row_center_offset = (text_height / 2) + GTK_WIDGET (clist)->style->font->ascent + 1.5;
    }
      
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  if (!GTK_CLIST_FROZEN (clist))
    {
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      adjust_scrollbars (clist);
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      draw_rows (clist, NULL);
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    }
}

void
gtk_clist_moveto (GtkCList * clist,
		  gint row,
		  gint column,
		  gfloat row_align,
		  gfloat col_align)
{
  gint x, y;

  g_return_if_fail (clist != NULL);

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  if (row < -1 || row >= clist->rows)
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    return;
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  if (column < -1 || column >= clist->columns)
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    return;

  /* adjust vertical scrollbar */
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  if (row >= 0)
    {
      x = ROW_TOP (clist, row) - (row_align * (clist->clist_window_height - 
					       (clist->row_height + 2 * CELL_SPACING)));
      
      if (x < 0)
	GTK_RANGE (clist->vscrollbar)->adjustment->value = 0.0;
      else if (x > LIST_HEIGHT (clist) - clist->clist_window_height)
	GTK_RANGE (clist->vscrollbar)->adjustment->value = LIST_HEIGHT (clist) - 
	  clist->clist_window_height;
      else
	GTK_RANGE (clist->vscrollbar)->adjustment->value = x;
      
      gtk_signal_emit_by_name (GTK_OBJECT (GTK_RANGE (clist->vscrollbar)->adjustment), 
			       "value_changed");
    } 
     
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  /* adjust horizontal scrollbar */
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  if (column >= 0)
    {
      y = COLUMN_LEFT (clist, column) - (col_align * (clist->clist_window_width - 
						      clist->column[column].area.width + 
						      2 * (CELL_SPACING + COLUMN_INSET)));
      
      if (y < 0)
	GTK_RANGE (clist->hscrollbar)->adjustment->value = 0.0;
      else if (y > LIST_WIDTH (clist) - clist->clist_window_width)
	GTK_RANGE (clist->hscrollbar)->adjustment->value = LIST_WIDTH (clist) - 
	  clist->clist_window_width;
      else
	GTK_RANGE (clist->hscrollbar)->adjustment->value = y;
      
      gtk_signal_emit_by_name (GTK_OBJECT (GTK_RANGE (clist->hscrollbar)->adjustment), 
			       "value_changed");
    }
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}

void
gtk_clist_set_text (GtkCList * clist,
		    gint row,
		    gint column,
		    gchar * text)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

  if (row < 0 || row >= clist->rows)
    return;
  if (column < 0 || column >= clist->columns)
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;

  /* if text is null, then the cell is empty */
  if (text)
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    cell_set_text (clist, clist_row, column, text);
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  else
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    cell_empty (clist, clist_row, column);
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  /* redraw the list if it's not frozen */
  if (!GTK_CLIST_FROZEN (clist))
    {
      if (gtk_clist_row_isvisable (clist, row))
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	draw_row (clist, NULL, row, clist_row);
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    }
}

void
gtk_clist_set_pixmap (GtkCList * clist,
		      gint row,
		      gint column,
		      GdkPixmap * pixmap,
		      GdkBitmap * mask)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

  if (row < 0 || row >= clist->rows)
    return;
  if (column < 0 || column >= clist->columns)
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;
  
  gdk_pixmap_ref (pixmap);
  gdk_pixmap_ref (mask);
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  cell_set_pixmap (clist, clist_row, column, pixmap, mask);
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  /* redraw the list if it's not frozen */
  if (!GTK_CLIST_FROZEN (clist))
    {
      if (gtk_clist_row_isvisable (clist, row))
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	draw_row (clist, NULL, row, clist_row);
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    }
}

void
gtk_clist_set_pixtext (GtkCList * clist,
		       gint row,
		       gint column,
		       gchar * text,
		       guint8 spacing,
		       GdkPixmap * pixmap,
		       GdkBitmap * mask)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

  if (row < 0 || row >= clist->rows)
    return;
  if (column < 0 || column >= clist->columns)
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;
  
  gdk_pixmap_ref (pixmap);
  gdk_pixmap_ref (mask);
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  cell_set_pixtext (clist, clist_row, column, text, spacing, pixmap, mask);
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  /* redraw the list if it's not frozen */
  if (!GTK_CLIST_FROZEN (clist))
    {
      if (gtk_clist_row_isvisable (clist, row))
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	draw_row (clist, NULL, row, clist_row);
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    }
}

void
gtk_clist_set_foreground (GtkCList * clist,
			  gint row,
			  GdkColor * color)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);
  g_return_if_fail (color != NULL);

  if (row < 0 || row >= clist->rows)
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;
  clist_row->foreground = *color;
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  clist_row->fg_set = TRUE;
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  if (!GTK_CLIST_FROZEN (clist) && gtk_clist_row_isvisable (clist, row))
    draw_row (clist, NULL, row, clist_row);
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}

void gtk_clist_set_background (GtkCList * clist,
			       gint row,
			       GdkColor * color)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);
  g_return_if_fail (color != NULL);

  if (row < 0 || row >= clist->rows)
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;
  clist_row->background = *color;
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  clist_row->bg_set = TRUE;
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  if (!GTK_CLIST_FROZEN (clist) && gtk_clist_row_isvisable (clist, row))
    draw_row (clist, NULL, row, clist_row);
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}

void
gtk_clist_set_shift (GtkCList * clist,
		     gint row,
		     gint column,
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		     gint vertical,
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		     gint horizontal)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

  if (row < 0 || row >= clist->rows)
    return;
  if (column < 0 || column >= clist->columns)
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;

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  clist_row->cell[column].vertical = vertical;
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  clist_row->cell[column].horizontal = horizontal;

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  if (!GTK_CLIST_FROZEN (clist) && gtk_clist_row_isvisable (clist, row))
    draw_row (clist, NULL, row, clist_row);
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}

gint
gtk_clist_append (GtkCList * clist,
		  gchar * text[])
{
  gint i;
  GtkCListRow *clist_row;

  g_return_val_if_fail (clist != NULL, -1);

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  clist_row = row_new (clist);
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  clist->rows++;

  /* keeps track of the end of the list so the list 
   * doesn't have to be traversed every time a item is added */
  if (!clist->row_list)
    {
      clist->row_list = g_list_append (clist->row_list, clist_row);
      clist->row_list_end = clist->row_list;

      /* check the selection mode to see if we should select
       * the first row automaticly */
      switch (clist->selection_mode)
	{
	case GTK_SELECTION_BROWSE:
	  gtk_clist_select_row (clist, 0, -1);
	  break;

	default:
	  break;
	}
    }
  else
    clist->row_list_end = (g_list_append (clist->row_list_end, clist_row))->next;

  /* set the text in the row's columns */
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  if (text)
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    for (i = 0; i < clist->columns; i++)
      if (text[i])
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        cell_set_text (clist, clist_row, i, text[i]);
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  /* redraw the list if it's not frozen */
  if (!GTK_CLIST_FROZEN (clist))
    {
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      adjust_scrollbars (clist);
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      if (gtk_clist_row_isvisable (clist, clist->rows - 1))
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	draw_rows (clist, NULL);
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    }

  /* return index of the row */
  return clist->rows - 1;
}

void
gtk_clist_insert (GtkCList * clist,
		  gint row,
		  gchar * text[])
{
  gint i;
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);
  g_return_if_fail (text != NULL);

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  /* return if out of bounds */
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  if (row < 0 || row > (clist->rows - 1))
    return;

  /* create the row */
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  clist_row = row_new (clist);
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  /* reset the row end pointer if we're inserting at the
   * end of the list */
  if (row == clist->rows)
    clist->row_list_end = (g_list_append (clist->row_list_end, clist_row))->next;
  else
    clist->row_list = g_list_insert (clist->row_list, clist_row, row);

  clist->rows++;

  /* set the text in the row's columns */
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  if (text)
    for (i = 0; i < clist->columns; i++)
      if (text[i])
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	cell_set_text (clist, clist_row, i, text[i]);
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  /* redraw the list if it isn't frozen */
  if (!GTK_CLIST_FROZEN (clist))
    {
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      adjust_scrollbars (clist);
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      if (gtk_clist_row_isvisable (clist, row))
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	draw_rows (clist, NULL);
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    }
}

void
gtk_clist_remove (GtkCList * clist,
		  gint row)
{
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  gint was_visible;
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  GList *list;
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

  /* return if out of bounds */
  if (row < 0 || row > (clist->rows - 1))
    return;

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  was_visible = gtk_clist_row_isvisable (clist, row);

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  /* get the row we're going to delete */
  list = g_list_nth (clist->row_list, row);
  clist_row = list->data;

  /* reset the row end pointer if we're removing at the
   * end of the list */
  if (row == clist->rows - 1)
    clist->row_list_end = list->prev;

  clist->row_list = g_list_remove (clist->row_list, clist_row);
  clist->rows--;

  /* redraw the row if it isn't frozen */
  if (!GTK_CLIST_FROZEN (clist))
    {
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      adjust_scrollbars (clist);
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      if (was_visible)
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	draw_rows (clist, NULL);
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    }
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  if (clist_row->state == GTK_STATE_SELECTED)
    {
      switch (clist->selection_mode)
	{
	case GTK_SELECTION_BROWSE:
	  if (row >= clist->rows)
	    row--;
	  gtk_clist_select_row (clist, row, -1);
	  break;
	  
	default:
	  break;
	}

      /* remove from selection list */
      clist->selection = g_list_remove (clist->selection, clist_row);
    }

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  row_delete (clist, clist_row);
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}

void
gtk_clist_clear (GtkCList * clist)
{
  GList *list;
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

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  /* remove all the rows */
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  list = clist->row_list;
  while (list)
    {
      clist_row = list->data;
      list = list->next;

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      row_delete (clist, clist_row);
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    }
  g_list_free (clist->row_list);

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  /* free up the selection list */
  g_list_free (clist->selection);

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  clist->row_list = NULL;
  clist->row_list_end = NULL;
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  clist->selection = NULL;
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  clist->voffset = 0;
  clist->rows = 0;

  /* zero-out the scrollbars */
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  if (clist->vscrollbar)
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    {
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      GTK_RANGE (clist->vscrollbar)->adjustment->value = 0.0;
      gtk_signal_emit_by_name (GTK_OBJECT (GTK_RANGE (clist->vscrollbar)->adjustment), "changed");
      
      if (!GTK_CLIST_FROZEN (clist))
	{
	  adjust_scrollbars (clist);
	  draw_rows (clist, NULL);
	}
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    }
}

void
gtk_clist_set_row_data (GtkCList * clist,
			gint row,
			gpointer data)
{
  GtkCListRow *clist_row;

  g_return_if_fail (clist != NULL);

  if (row < 0 || row > (clist->rows - 1))
    return;

  clist_row = (g_list_nth (clist->row_list, row))->data;
  clist_row->data = data;

  /*
   * re-send the selected signal if data is changed/added
   * so the application can respond to the new data -- 
   * this could be questionable behavior
   */
  if (clist_row->state == GTK_STATE_SELECTED)
    gtk_clist_select_row (clist, 0, 0);
}

gpointer
gtk_clist_get_row_data (GtkCList * clist,
			gint row)
{
  GtkCListRow *clist_row;

  g_return_val_if_fail (clist != NULL, NULL);

  if (row < 0 || row > (clist->rows - 1))
    return NULL;

  clist_row = (g_list_nth (clist->row_list, row))->data;
  return clist_row->data;
}

void
gtk_clist_select_row (GtkCList * clist,
		      gint row,
		      gint column)
{
  g_return_if_fail (clist != NULL);

  if (row < 0 || row >= clist->rows)
    return;

  if (column < -1 || column >= clist->columns)
    return;

  gtk_signal_emit (GTK_OBJECT (clist), clist_signals[SELECT_ROW], row, column, NULL);
}

void
gtk_clist_unselect_row (GtkCList * clist,
			gint row,
			gint column)
{
  g_return_if_fail (clist != NULL);

  if (row < 0 || row >= clist->rows)
    return;

  if (column < -1 || column >= clist->columns)
    return;

  gtk_signal_emit (GTK_OBJECT (clist), clist_signals[UNSELECT_ROW], row, column, NULL);
}

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gint
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gtk_clist_row_isvisable (GtkCList * clist,
			 gint row)
{
  g_return_val_if_fail (clist != NULL, 0);

  if (row < 0 || row >= clist->rows)
    return 0;

  if (clist->row_height == 0)
    return 0;

  if (row < ROW_FROM_YPIXEL (clist, 0))
    return 0;

  if (row > ROW_FROM_YPIXEL (clist, clist->clist_window_height))
    return 0;

  return 1;
}

GtkAdjustment *
gtk_clist_get_vadjustment (GtkCList * clist)
{
  g_return_val_if_fail (clist != NULL, NULL);
  g_return_val_if_fail (GTK_IS_CLIST (clist), NULL);

  return gtk_range_get_adjustment (GTK_RANGE (clist->vscrollbar));
}

GtkAdjustment *
gtk_clist_get_hadjustment (GtkCList * clist)
{
  g_return_val_if_fail (clist != NULL, NULL);
  g_return_val_if_fail (GTK_IS_CLIST (clist), NULL);

  return gtk_range_get_adjustment (GTK_RANGE (clist->hscrollbar));
}

void
gtk_clist_set_policy (GtkCList * clist,
		      GtkPolicyType vscrollbar_policy,
		      GtkPolicyType hscrollbar_policy)
{
  g_return_if_fail (clist != NULL);
  g_return_if_fail (GTK_IS_CLIST (clist));

  if (clist->vscrollbar_policy != vscrollbar_policy)
    {
      clist->vscrollbar_policy = vscrollbar_policy;

      if (GTK_WIDGET (clist)->parent)
	gtk_widget_queue_resize (GTK_WIDGET (clist));
    }

  if (clist->hscrollbar_policy != hscrollbar_policy)
    {
      clist->hscrollbar_policy = hscrollbar_policy;

      if (GTK_WIDGET (clist)->parent)
	gtk_widget_queue_resize (GTK_WIDGET (clist));
    }
}

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/*
 * GTKOBJECT
 *   gtk_clist_destroy
1373
 *   gtk_clist_finalize
1374
 */
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static void
gtk_clist_destroy (GtkObject * object)
{
  gint i;
  GtkCList *clist;

  g_return_if_fail (object != NULL);
  g_return_if_fail (GTK_IS_CLIST (object));

  clist = GTK_CLIST (object);

  /* freeze the list */
  GTK_CLIST_SET_FLAGS (clist, CLIST_FROZEN);

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  /* get rid of all the rows */
  gtk_clist_clear (clist);

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  /* Since we don't have a _remove method, unparent the children
   * instead of destroying them so the focus will be unset properly.
   * (For other containers, the _remove method takes care of the
   * unparent) The destroy will happen when the refcount drops
   * to zero.
   */

1399
  /* destroy the scrollbars */
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  if (clist->vscrollbar)
    {
      gtk_widget_unparent (clist->vscrollbar);
      clist->vscrollbar = NULL;
    }
  if (clist->hscrollbar)
    {
      gtk_widget_unparent (clist->hscrollbar);
      clist->hscrollbar = NULL;
    }
1410

1411
  /* destroy the column buttons */
1412
  for (i = 0; i < clist->columns; i++)
1413
    if (clist->column[i].button)
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      {
	gtk_widget_unparent (clist->column[i].button);
	clist->column[i].button = NULL;
      }

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

static void
gtk_clist_finalize (GtkObject * object)
{
  GtkCList *clist;

  g_return_if_fail (object != NULL);
  g_return_if_fail (GTK_IS_CLIST (object));

  clist = GTK_CLIST (object);
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