about Chinese Char in GtkText

[xiening <xiening topshine com cn>]

hi, though gtk1.2 is a bit out of date I have something to ask.
I give the code base on gtk1.2.9/example/text.
I add a delete button and want to delete some context. I find that for 
chinese code it delete by two and english either. It should not do as it.
welcome any suggestion.
( you could get what I add by "/****************" and for some reason I 
use "text" as a global on )
thank for your attention

*******************************************

/* example-start text text.c */

/* text.c */

#include <stdio.h>
#include <gtk/gtk.h>

GtkWidget *text;

void text_toggle_editable (GtkWidget *checkbutton,
			   GtkWidget *text)
{
 gtk_text_set_editable(GTK_TEXT(text),
			GTK_TOGGLE_BUTTON(checkbutton)->active);
}

void text_toggle_word_wrap (GtkWidget *checkbutton,
			    GtkWidget *text)
{
 gtk_text_set_word_wrap(GTK_TEXT(text),
			 GTK_TOGGLE_BUTTON(checkbutton)->active);
}

/************************************ that delete ----test */
void delete_some( GtkWidget *widget,
                       gpointer data )
{
      	gtk_editable_delete_text ( (GtkEditable * ) text, 0, 2);
	/* terrible!!! no effect for Chinese char, test "ning" and chinese xiening */
	//gtk_text_backward_delete ( (GtkText *) text, 2 );
	//gtk_text_forward_delete ( (GtkText *) text, 2 );
}

void close_application( GtkWidget *widget,
                       gpointer   data )
{
      gtk_main_quit();
}

int main( int argc,
         char *argv[] )
{
 GtkWidget *window;
 GtkWidget *box1;
 GtkWidget *box2;
 GtkWidget *hbox;
 GtkWidget *button;
 GtkWidget *buttonA;
 GtkWidget *check;
 GtkWidget *separator;
 GtkWidget *table;
 GtkWidget *vscrollbar;
//  GtkWidget *text;
 GdkColormap *cmap;
 GdkColor color;
 GdkFont *fixed_font;

 FILE *infile;
 
/*******************************this line is what I add to locale*/
 gtk_set_locale ( );
 gtk_init (&argc, &argv);

 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 gtk_widget_set_usize (window, 600, 500);
 gtk_window_set_policy (GTK_WINDOW(window), TRUE, TRUE, FALSE);  
 gtk_signal_connect (GTK_OBJECT (window), "destroy",
		      GTK_SIGNAL_FUNC(close_application),
		      NULL);
 gtk_window_set_title (GTK_WINDOW (window), "Text Widget Example");
 gtk_container_set_border_width (GTK_CONTAINER (window), 0);
 
 
 box1 = gtk_vbox_new (FALSE, 0);
 gtk_container_add (GTK_CONTAINER (window), box1);
 gtk_widget_show (box1);
 
 
 box2 = gtk_vbox_new (FALSE, 10);
 gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
 gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
 gtk_widget_show (box2);
 
 
 table = gtk_table_new (2, 2, FALSE);
 gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
 gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
 gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);
 gtk_widget_show (table);
 
 /* Create the GtkText widget */
 text = gtk_text_new (NULL, NULL);
 gtk_text_set_editable (GTK_TEXT (text), TRUE);
 gtk_table_attach (GTK_TABLE (table), text, 0, 1, 0, 1,
		    GTK_EXPAND | GTK_SHRINK | GTK_FILL,
		    GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
 gtk_widget_show (text);

 /* Add a vertical scrollbar to the GtkText widget */
 vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
 gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,
		    GTK_FILL, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
 gtk_widget_show (vscrollbar);

 /* Get the system color map and allocate the color red */
/*  cmap = gdk_colormap_get_system();
 color.red = 0xffff;
 color.green = 0;
 color.blue = 0;
 if (!gdk_color_alloc(cmap, &color)) {
   g_error("couldn't allocate color");
 }*/

 /* Load a fixed font */
 /********************* I add gb2312.1980-0 for font */
 fixed_font = gdk_font_load ("-misc-fixed-medium-r-*-*-*-140-*-*-*-*-*-*,\
  						-*-*-medium-r-normal--14-*-*-*-*-*-gb2312.1980-0");

 /* Realizing a widget creates a window for it,
  * ready for us to insert some text */
// gtk_widget_realize (text);

 /* Freeze the text widget, ready for multiple updates */
 //gtk_text_freeze (GTK_TEXT (text));
 
 /* Insert some colored text */
/*  gtk_text_insert (GTK_TEXT (text), NULL, &text->style->black, NULL,
		   "Supports ", -1);
 gtk_text_insert (GTK_TEXT (text), NULL, &color, NULL,
		   "colored ", -1);
 gtk_text_insert (GTK_TEXT (text), NULL, &text->style->black, NULL,
		   "text and different ", -1);
 gtk_text_insert (GTK_TEXT (text), fixed_font, &text->style->black, NULL,
		   "fonts\n\n", -1);*/
 
 /* Load the file text.c into the text window */

/* infile = fopen("text.c", "r");
 
 if (infile) {
   char buffer[1024];
   int nchars;
   
   while (1)
     {
	nchars = fread(buffer, 1, 1024, infile);
	gtk_text_insert (GTK_TEXT (text), fixed_font, NULL,
			 NULL, buffer, nchars);
	
	if (nchars < 1024)
	  break;
     }
   
   fclose (infile);
 }*/

 /* Thaw the text widget, allowing the updates to become visible */  
/*  gtk_text_thaw (GTK_TEXT (text));*/
 
 hbox = gtk_hbutton_box_new ();
 gtk_box_pack_start (GTK_BOX (box2), hbox, FALSE, FALSE, 0);
 gtk_widget_show (hbox);

 check = gtk_check_button_new_with_label("Editable");
 gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, FALSE, 0);
 gtk_signal_connect (GTK_OBJECT(check), "toggled",
		      GTK_SIGNAL_FUNC(text_toggle_editable), text);
 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), TRUE);
 gtk_widget_show (check);
 check = gtk_check_button_new_with_label("Wrap Words");
 gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, TRUE, 0);
 gtk_signal_connect (GTK_OBJECT(check), "toggled",
		      GTK_SIGNAL_FUNC(text_toggle_word_wrap), text);
 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), FALSE);
 gtk_widget_show (check);

 separator = gtk_hseparator_new ();
 gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
 gtk_widget_show (separator);

 box2 = gtk_vbox_new (FALSE, 10);
 gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
 gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
 gtk_widget_show (box2);

 /****************************** I add delete button to delete text 
   ******************************by start_pos   
   *****************************  end_pos ; */
 buttonA = gtk_button_new_with_label ("delete");
 gtk_signal_connect (GTK_OBJECT (buttonA), "clicked",
		      GTK_SIGNAL_FUNC(delete_some),
		      NULL);
 gtk_box_pack_start (GTK_BOX (box2), buttonA, TRUE, TRUE, 0);
 GTK_WIDGET_SET_FLAGS (buttonA, GTK_CAN_DEFAULT);
 gtk_widget_grab_default (buttonA);
 gtk_widget_show (buttonA);
 
 button = gtk_button_new_with_label ("close");
 gtk_signal_connect (GTK_OBJECT (button), "clicked",
		      GTK_SIGNAL_FUNC(close_application),
		      NULL);
 gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
 GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
 gtk_widget_grab_default (button);
 gtk_widget_show (button);

 gtk_widget_show (window);

 gtk_main ();
 
 return(0);       
}
/* example-end */

--- Begin Message ---

• From: xiening <xiening topshine com cn>
• To: hqs <hqs topshine com cn>, hqs_tw <hqs topshine com tw>, jacky <jacky topshine com cn>, jacky_tw <jacky topshine com tw>, selina <selina topshine com cn>, selina_tw <selina topshine com tw>
• Subject: bug?
• Date: Thu, 30 Jan 2003 17:39:35 +0800

hi, there.

Thought I have scaned the archive and have not found any thing value I meet a new problem about gtktext.

why it delete chinese by two and english by two?
that means:
if you paste "tops??" and use

gtk_editable_delete_text (text, 0, 2 );

it will delete 1. to

2. ps
3. ??

(I attach the code I base on 1.2.9 text
you can compile text.c or run ./text. )

bug or not?
to be or not to be..

I just for the bug archive directly.

good luck

/* example-start text text.c */

/* text.c */

#include <stdio.h>
#include <gtk/gtk.h>

GtkWidget *text;

void text_toggle_editable (GtkWidget *checkbutton,
			   GtkWidget *text)
{
  gtk_text_set_editable(GTK_TEXT(text),
			GTK_TOGGLE_BUTTON(checkbutton)->active);
}

void text_toggle_word_wrap (GtkWidget *checkbutton,
			    GtkWidget *text)
{
  gtk_text_set_word_wrap(GTK_TEXT(text),
			 GTK_TOGGLE_BUTTON(checkbutton)->active);
}

/************************************ that delete ----test */
void delete_some( GtkWidget *widget,
                        gpointer data )
{
       	gtk_editable_delete_text ( (GtkEditable * ) text, 0, 2);
	/* terrible!!! no effect for Chinese char, test "ning" and chinese xiening */
	//gtk_text_backward_delete ( (GtkText *) text, 2 );
	//gtk_text_forward_delete ( (GtkText *) text, 2 );
}

void close_application( GtkWidget *widget,
                        gpointer   data )
{
       gtk_main_quit();
}

int main( int argc,
          char *argv[] )
{
  GtkWidget *window;
  GtkWidget *box1;
  GtkWidget *box2;
  GtkWidget *hbox;
  GtkWidget *button;
  GtkWidget *buttonA;
  GtkWidget *check;
  GtkWidget *separator;
  GtkWidget *table;
  GtkWidget *vscrollbar;
//  GtkWidget *text;
  GdkColormap *cmap;
  GdkColor color;
  GdkFont *fixed_font;

  FILE *infile;
  
 /*******************************this line is what I add to locale*/
  gtk_set_locale ( );
  gtk_init (&argc, &argv);
 
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_set_usize (window, 600, 500);
  gtk_window_set_policy (GTK_WINDOW(window), TRUE, TRUE, FALSE);  
  gtk_signal_connect (GTK_OBJECT (window), "destroy",
		      GTK_SIGNAL_FUNC(close_application),
		      NULL);
  gtk_window_set_title (GTK_WINDOW (window), "Text Widget Example");
  gtk_container_set_border_width (GTK_CONTAINER (window), 0);
  
  
  box1 = gtk_vbox_new (FALSE, 0);
  gtk_container_add (GTK_CONTAINER (window), box1);
  gtk_widget_show (box1);
  
  
  box2 = gtk_vbox_new (FALSE, 10);
  gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
  gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
  gtk_widget_show (box2);
  
  
  table = gtk_table_new (2, 2, FALSE);
  gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
  gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
  gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);
  gtk_widget_show (table);
  
  /* Create the GtkText widget */
  text = gtk_text_new (NULL, NULL);
  gtk_text_set_editable (GTK_TEXT (text), TRUE);
  gtk_table_attach (GTK_TABLE (table), text, 0, 1, 0, 1,
		    GTK_EXPAND | GTK_SHRINK | GTK_FILL,
		    GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
  gtk_widget_show (text);

  /* Add a vertical scrollbar to the GtkText widget */
  vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
  gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,
		    GTK_FILL, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
  gtk_widget_show (vscrollbar);

  /* Get the system color map and allocate the color red */
/*  cmap = gdk_colormap_get_system();
  color.red = 0xffff;
  color.green = 0;
  color.blue = 0;
  if (!gdk_color_alloc(cmap, &color)) {
    g_error("couldn't allocate color");
  }*/

  /* Load a fixed font */
  /********************* I add gb2312.1980-0 for font */
  fixed_font = gdk_font_load ("-misc-fixed-medium-r-*-*-*-140-*-*-*-*-*-*,\
   						-*-*-medium-r-normal--14-*-*-*-*-*-gb2312.1980-0");

  /* Realizing a widget creates a window for it,
   * ready for us to insert some text */
 // gtk_widget_realize (text);

  /* Freeze the text widget, ready for multiple updates */
  //gtk_text_freeze (GTK_TEXT (text));
  
  /* Insert some colored text */
/*  gtk_text_insert (GTK_TEXT (text), NULL, &text->style->black, NULL,
		   "Supports ", -1);
  gtk_text_insert (GTK_TEXT (text), NULL, &color, NULL,
		   "colored ", -1);
  gtk_text_insert (GTK_TEXT (text), NULL, &text->style->black, NULL,
		   "text and different ", -1);
  gtk_text_insert (GTK_TEXT (text), fixed_font, &text->style->black, NULL,
		   "fonts\n\n", -1);*/
  
  /* Load the file text.c into the text window */

 /* infile = fopen("text.c", "r");
  
  if (infile) {
    char buffer[1024];
    int nchars;
    
    while (1)
      {
	nchars = fread(buffer, 1, 1024, infile);
	gtk_text_insert (GTK_TEXT (text), fixed_font, NULL,
			 NULL, buffer, nchars);
	
	if (nchars < 1024)
	  break;
      }
    
    fclose (infile);
  }*/

  /* Thaw the text widget, allowing the updates to become visible */  
/*  gtk_text_thaw (GTK_TEXT (text));*/
  
  hbox = gtk_hbutton_box_new ();
  gtk_box_pack_start (GTK_BOX (box2), hbox, FALSE, FALSE, 0);
  gtk_widget_show (hbox);

  check = gtk_check_button_new_with_label("Editable");
  gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, FALSE, 0);
  gtk_signal_connect (GTK_OBJECT(check), "toggled",
		      GTK_SIGNAL_FUNC(text_toggle_editable), text);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), TRUE);
  gtk_widget_show (check);
  check = gtk_check_button_new_with_label("Wrap Words");
  gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, TRUE, 0);
  gtk_signal_connect (GTK_OBJECT(check), "toggled",
		      GTK_SIGNAL_FUNC(text_toggle_word_wrap), text);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), FALSE);
  gtk_widget_show (check);

  separator = gtk_hseparator_new ();
  gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
  gtk_widget_show (separator);

  box2 = gtk_vbox_new (FALSE, 10);
  gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
  gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
  gtk_widget_show (box2);

  /****************************** I add delete button to delete text 
    ******************************by start_pos = 2  
    *****************************  end_pos = 6; */
  buttonA = gtk_button_new_with_label ("delete");
  gtk_signal_connect (GTK_OBJECT (buttonA), "clicked",
		      GTK_SIGNAL_FUNC(delete_some),
		      NULL);
  gtk_box_pack_start (GTK_BOX (box2), buttonA, TRUE, TRUE, 0);
  GTK_WIDGET_SET_FLAGS (buttonA, GTK_CAN_DEFAULT);
  gtk_widget_grab_default (buttonA);
  gtk_widget_show (buttonA);
  
  button = gtk_button_new_with_label ("close");
  gtk_signal_connect (GTK_OBJECT (button), "clicked",
		      GTK_SIGNAL_FUNC(close_application),
		      NULL);
  gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
  GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
  gtk_widget_grab_default (button);
  gtk_widget_show (button);

  gtk_widget_show (window);

  gtk_main ();
  
  return(0);       
}
/* example-end */

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