ltt/branches/poly/lttv/modules/gui/filter/filter.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2005 Simon Bouvier-Zappa
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation;
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  16  * MA 02111-1307, USA.
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include <glib.h>
  24 #include <string.h>
  25 #include <gtk/gtk.h>
  26 #include <gdk/gdk.h>
  27 #include <gdk/gdkkeysyms.h>
  28
  29 #include <lttv/lttv.h>
  30 #include <lttv/module.h>
  31 #include <lttv/hook.h>
  32 #include <lttv/filter.h>
  33
  34 #include <lttvwindow/lttvwindow.h>
  35 #include <lttvwindow/lttvwindowtraces.h>
  36
  37 #include "hGuiFilterInsert.xpm"
  38
  39
  40 GSList *g_filter_list = NULL ;
  41
  42 /*! \file lttv/modules/gui/filter/filter.c
  43  *  \brief Graphic filter interface.
  44  *
  45  *  The gui filter facility gives the user an easy to use
  46  *  basic interface to construct and modify at will a filter
  47  *  expression.  User may either decide to write it himself in
  48  *  expression text entry or add simple expressions using the
  49  *  many choices boxes.
  50  *
  51  *  \note The version of gtk-2.0 currently installed on
  52  *  my desktop misses some function of the newer
  53  *  gtk+ api.  For the time being, I'll use the older api
  54  *  to keep compatibility with most systems.
  55  */
  56
  57 typedef struct _FilterViewerData FilterViewerData;
  58 typedef struct _FilterViewerDataLine FilterViewerDataLine;
  59
  60 /*
  61  * Prototypes
  62  */
  63 GtkWidget *guifilter_get_widget(FilterViewerData *fvd);
  64 FilterViewerData *gui_filter(LttvPlugin *plugin);
  65 void gui_filter_destructor(FilterViewerData *fvd);
  66 FilterViewerDataLine* gui_filter_add_line(FilterViewerData *fvd);
  67 void gui_filter_line_set_visible(FilterViewerDataLine *fvdl, gboolean v);
  68 void gui_filter_line_reset(FilterViewerDataLine *fvdl);
  69 GtkWidget* h_guifilter(LttvPlugin *plugin);
  70 void filter_destroy_walk(gpointer data, gpointer user_data);
  71
  72 /*
  73  * Callback functions
  74  */
  75 void callback_process_button(GtkWidget *widget, gpointer data);
  76 gboolean callback_enter_check(GtkWidget *widget,
  77     GdkEventKey *event,
  78     gpointer user_data);
  79 void callback_add_button(GtkWidget *widget, gpointer data);
  80 void callback_logical_op_box(GtkWidget *widget, gpointer data);
  81 void callback_expression_field(GtkWidget *widget, gpointer data);
  82
  83 /**
  84  *  @struct _FilterViewerDataLine
  85  *
  86  *  @brief Defines a simple expression
  87  *  This structures defines a simple
  88  *  expression whithin the main filter
  89  *  viewer data
  90  */
  91 struct _FilterViewerDataLine {
  92   int row;                            /**< row number */
  93   gboolean visible;                   /**< visible state */
  94   GtkWidget *f_not_op_box;            /**< '!' operator (GtkComboBox) */
  95   GtkWidget *f_logical_op_box;        /**< '&,|,^' operators (GtkComboBox) */
  96   GtkWidget *f_field_box;             /**< field types (GtkComboBox) */
  97   GtkWidget *f_math_op_box;           /**< '>,>=,<,<=,=,!=' operators (GtkComboBox) */
  98   GtkWidget *f_value_field;           /**< expression's value (GtkComboBox) */
  99 };
 100
 101 /**
 102  *  @struct _FilterViewerData
 103  *
 104  *  @brief Main structure of gui filter
 105  *  Main struct for the filter gui module
 106  */
 107 struct _FilterViewerData {
 108   LttvPlugin *plugin;                   /**< Plugin on which we interact. */
 109
 110   GtkWidget *f_window;                  /**< filter window */
 111
 112   GtkWidget *f_main_box;                /**< main container */
 113
 114   GtkWidget *f_expression_field;        /**< entire expression (GtkEntry) */
 115   GtkWidget *f_process_button;          /**< process expression button (GtkButton) */
 116
 117   GtkWidget *f_logical_op_junction_box; /**< linking operator box (GtkComboBox) */
 118
 119   int rows;                             /**< number of rows */
 120   GPtrArray *f_lines;                   /**< array of FilterViewerDataLine */
 121
 122   GPtrArray *f_not_op_options;          /**< array of operators types for not_op box */
 123   GPtrArray *f_logical_op_options;      /**< array of operators types for logical_op box */
 124   GPtrArray *f_field_options;           /**< array of field types for field box */
 125   GPtrArray *f_math_op_options;         /**< array of operators types for math_op box */
 126
 127   GtkWidget *f_add_button;              /**< add expression to current expression (GtkButton) */
 128
 129 };
 130
 131 /**
 132  *  @fn GtkWidget* guifilter_get_widget(FilterViewerData*)
 133  *
 134  *  This function returns the current main widget
 135  *  used by this module
 136  *  @param fvd the module struct
 137  *  @return The main widget
 138  */
 139 GtkWidget*
 140 guifilter_get_widget(FilterViewerData *fvd)
 141 {
 142   return fvd->f_window;
 143 }
 144
 145 /**
 146  *  @fn FilterViewerData* gui_filter(Tab*)
 147  *
 148  *  Constructor is used to create FilterViewerData data structure.
 149  *  @param tab The tab structure used by the widget
 150  *  @return The Filter viewer data created.
 151  */
 152 FilterViewerData*
 153 gui_filter(LttvPlugin *plugin)
 154 {
 155   g_debug("filter::gui_filter()");
 156
 157   unsigned i;
 158   GtkCellRenderer *renderer;
 159   GtkTreeViewColumn *column;
 160
 161   FilterViewerData* fvd = g_new(FilterViewerData,1);
 162
 163   fvd->plugin = plugin;
 164
 165 //  lttvwindow_register_traceset_notify(fvd->tab,
 166 //                                      filter_traceset_changed,
 167 //                                     filter_viewer_data);
 168 //  request_background_data(filter_viewer_data);
 169
 170   /*
 171    * Initiating items for
 172    * combo boxes
 173    */
 174   fvd->f_not_op_options = g_ptr_array_new();
 175   g_ptr_array_add(fvd->f_not_op_options,(gpointer) g_string_new(""));
 176   g_ptr_array_add(fvd->f_not_op_options,(gpointer) g_string_new("!"));
 177
 178   fvd->f_logical_op_options = g_ptr_array_new(); //g_array_new(FALSE,FALSE,sizeof(gchar));
 179   g_ptr_array_add(fvd->f_logical_op_options,(gpointer) g_string_new(""));
 180   g_ptr_array_add(fvd->f_logical_op_options,(gpointer) g_string_new("&"));
 181   g_ptr_array_add(fvd->f_logical_op_options,(gpointer) g_string_new("|"));
 182   g_ptr_array_add(fvd->f_logical_op_options,(gpointer) g_string_new("!"));
 183   g_ptr_array_add(fvd->f_logical_op_options,(gpointer) g_string_new("^"));
 184
 185   fvd->f_field_options = g_ptr_array_new(); //g_array_new(FALSE,FALSE,16);
 186   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new(""));
 187   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("event.name"));
 188   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("event.facility"));
 189   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("event.category"));
 190   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("event.time"));
 191   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("event.tsc"));
 192   /*
 193    * TODO: Add core.xml fields here !
 194    */
 195   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("tracefile.name"));
 196   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("trace.name"));
 197   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.process_name"));
 198   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.thread_brand"));
 199   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.pid"));
 200   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.ppid"));
 201   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.creation_time"));
 202   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.insertion_time"));
 203   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.execution_mode"));
 204   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.execution_submode"));
 205   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.process_status"));
 206   g_ptr_array_add(fvd->f_field_options,(gpointer) g_string_new("state.cpu"));
 207
 208   fvd->f_math_op_options = g_ptr_array_new(); //g_array_new(FALSE,FALSE,7);
 209   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new(""));
 210   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new("="));
 211   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new("!="));
 212   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new("<"));
 213   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new("<="));
 214   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new(">"));
 215   g_ptr_array_add(fvd->f_math_op_options,(gpointer) g_string_new(">="));
 216
 217
 218   fvd->f_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 219   gtk_window_set_title(GTK_WINDOW(fvd->f_window), "LTTV Filter");
 220   gtk_window_set_transient_for(GTK_WINDOW(fvd->f_window),
 221       GTK_WINDOW(gtk_widget_get_toplevel(GTK_WIDGET(fvd->plugin->top_widget))));
 222   gtk_window_set_destroy_with_parent(GTK_WINDOW(fvd->f_window), TRUE);
 223
 224   /*
 225    * Initiating GtkTable layout
 226    * starts with 2 rows and 5 columns and
 227    * expands when expressions added
 228    */
 229   fvd->f_main_box = gtk_table_new(3,7,FALSE);
 230   gtk_table_set_row_spacings(GTK_TABLE(fvd->f_main_box),5);
 231   gtk_table_set_col_spacings(GTK_TABLE(fvd->f_main_box),5);
 232
 233   gtk_container_add(GTK_CONTAINER(fvd->f_window), GTK_WIDGET(fvd->f_main_box));
 234
 235   /*
 236    *  First half of the filter window
 237    *  - textual entry of filter expression
 238    *  - processing button
 239    */
 240   fvd->f_expression_field = gtk_entry_new(); //gtk_scrolled_window_new (NULL, NULL);
 241   g_signal_connect (G_OBJECT(fvd->f_expression_field),
 242       "key-press-event", G_CALLBACK (callback_enter_check), (gpointer)fvd);
 243 //  gtk_entry_set_text(GTK_ENTRY(fvd->f_expression_field),"state.cpu>0");
 244   gtk_widget_show (fvd->f_expression_field);
 245
 246   g_signal_connect (G_OBJECT (fvd->f_expression_field), "changed",
 247       G_CALLBACK (callback_expression_field), (gpointer) fvd);
 248
 249   fvd->f_process_button = gtk_button_new_with_label("Process");
 250   gtk_widget_show (fvd->f_process_button);
 251
 252   g_signal_connect (G_OBJECT (fvd->f_process_button), "clicked",
 253       G_CALLBACK (callback_process_button), (gpointer) fvd);
 254
 255   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvd->f_expression_field,0,6,0,1,GTK_FILL,GTK_FILL,0,0);
 256   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvd->f_process_button,6,7,0,1,GTK_FILL,GTK_FILL,0,0);
 257
 258
 259
 260   /*
 261    *  Second half of the filter window
 262    *  - combo boxes featuring filtering options added to the expression
 263    */
 264   fvd->f_add_button = gtk_button_new_with_label("Add Expression");
 265   gtk_widget_show (fvd->f_add_button);
 266
 267   g_signal_connect (G_OBJECT (fvd->f_add_button), "clicked",
 268       G_CALLBACK (callback_add_button), (gpointer) fvd);
 269
 270   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvd->f_add_button,6,7,1,2,GTK_FILL,GTK_FILL,0,0);
 271
 272   fvd->f_logical_op_junction_box = gtk_combo_box_new_text();
 273   for(i=0;i<fvd->f_logical_op_options->len;i++) {
 274     GString* s = g_ptr_array_index(fvd->f_logical_op_options,i);
 275     gtk_combo_box_append_text(GTK_COMBO_BOX(fvd->f_logical_op_junction_box), s->str);
 276   }
 277   gtk_combo_box_set_active(GTK_COMBO_BOX(fvd->f_logical_op_junction_box),0);
 278
 279   //gtk_widget_show(fvd->f_logical_op_box);
 280
 281   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvd->f_logical_op_junction_box,0,1,1,2,GTK_SHRINK,GTK_FILL,0,0);
 282
 283   gtk_container_set_border_width(GTK_CONTAINER(fvd->f_main_box), 1);
 284
 285   /* initialize a new line */
 286   fvd->f_lines = g_ptr_array_new();
 287   fvd->rows = 1;
 288   FilterViewerDataLine* fvdl = gui_filter_add_line(fvd);
 289   g_ptr_array_add(fvd->f_lines,(gpointer) fvdl);
 290
 291   /*
 292    * show main container
 293    */
 294   gtk_widget_show(fvd->f_main_box);
 295   gtk_widget_show(fvd->f_window);
 296
 297
 298   g_object_set_data_full(
 299       G_OBJECT(guifilter_get_widget(fvd)),
 300       "filter_viewer_data",
 301       fvd,
 302       (GDestroyNotify)gui_filter_destructor);
 303
 304   g_filter_list = g_slist_append(
 305       g_filter_list,
 306       fvd);
 307
 308   return fvd;
 309 }
 310
 311 /**
 312  *  @fn FilterViewerDataLine* gui_filter_add_line(FilterViewerData*)
 313  *
 314  *  Adds a filter option line on the module tab
 315  *  @param fvd The filter module structure
 316  *  @return The line structure
 317  */
 318 FilterViewerDataLine*
 319 gui_filter_add_line(FilterViewerData* fvd) {
 320
 321   FilterViewerDataLine* fvdl = g_new(FilterViewerDataLine,1);
 322
 323   unsigned i;
 324   fvdl->row = fvd->rows;
 325   fvdl->visible = TRUE;
 326
 327   fvdl->f_not_op_box = gtk_combo_box_new_text();
 328   for(i=0;i<fvd->f_not_op_options->len;i++) {
 329     GString* s = g_ptr_array_index(fvd->f_not_op_options,i);
 330     gtk_combo_box_append_text(GTK_COMBO_BOX(fvdl->f_not_op_box), s->str);
 331   }
 332
 333   fvdl->f_field_box = gtk_combo_box_new_text();
 334   for(i=0;i<fvd->f_field_options->len;i++) {
 335     GString* s = g_ptr_array_index(fvd->f_field_options,i);
 336 //    g_print("String field: %s\n",s->str);
 337     gtk_combo_box_append_text(GTK_COMBO_BOX(fvdl->f_field_box), s->str);
 338   }
 339
 340   fvdl->f_math_op_box = gtk_combo_box_new_text();
 341   for(i=0;i<fvd->f_math_op_options->len;i++) {
 342     GString* s = g_ptr_array_index(fvd->f_math_op_options,i);
 343     gtk_combo_box_append_text(GTK_COMBO_BOX(fvdl->f_math_op_box), s->str);
 344   }
 345
 346   fvdl->f_value_field = gtk_entry_new();
 347
 348   fvdl->f_logical_op_box = gtk_combo_box_new_text();
 349   for(i=0;i<fvd->f_logical_op_options->len;i++) {
 350     GString* s = g_ptr_array_index(fvd->f_logical_op_options,i);
 351     gtk_combo_box_append_text(GTK_COMBO_BOX(fvdl->f_logical_op_box), s->str);
 352   }
 353   gtk_widget_set_events(fvdl->f_logical_op_box,
 354       GDK_ENTER_NOTIFY_MASK |
 355       GDK_LEAVE_NOTIFY_MASK |
 356       GDK_FOCUS_CHANGE_MASK);
 357
 358   g_signal_connect (G_OBJECT (fvdl->f_logical_op_box), "changed",
 359     G_CALLBACK (callback_logical_op_box), (gpointer) fvd);
 360
 361   gui_filter_line_reset(fvdl);
 362   gui_filter_line_set_visible(fvdl,TRUE);
 363
 364   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvdl->f_not_op_box,0,1,fvd->rows+1,fvd->rows+2,GTK_SHRINK,GTK_FILL,0,0);
 365   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvdl->f_field_box,1,3,fvd->rows+1,fvd->rows+2,GTK_SHRINK,GTK_FILL,0,0);
 366   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvdl->f_math_op_box,3,4,fvd->rows+1,fvd->rows+2,GTK_SHRINK,GTK_FILL,0,0);
 367   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvdl->f_value_field,4,5,fvd->rows+1,fvd->rows+2,GTK_SHRINK,GTK_FILL,0,0);
 368   gtk_table_attach( GTK_TABLE(fvd->f_main_box),fvdl->f_logical_op_box,5,6,fvd->rows+1,fvd->rows+2,GTK_SHRINK,GTK_FILL,0,0);
 369
 370   return fvdl;
 371 }
 372
 373 /**
 374  *  @fn void gui_filter_line_set_visible(FilterViewerDataLine*,gboolean)
 375  *
 376  *  Change visible state of current FilterViewerDataLine
 377  *  @param fvdl pointer to the current FilterViewerDataLine
 378  *  @param v TRUE: sets visible, FALSE: sets invisible
 379  */
 380 void
 381 gui_filter_line_set_visible(FilterViewerDataLine *fvdl, gboolean v) {
 382
 383   fvdl->visible = v;
 384   if(v) {
 385     gtk_widget_show(fvdl->f_not_op_box);
 386     gtk_widget_show(fvdl->f_field_box);
 387     gtk_widget_show(fvdl->f_math_op_box);
 388     gtk_widget_show(fvdl->f_value_field);
 389     gtk_widget_show(fvdl->f_logical_op_box);
 390   } else {
 391     gtk_widget_hide(fvdl->f_not_op_box);
 392     gtk_widget_hide(fvdl->f_field_box);
 393     gtk_widget_hide(fvdl->f_math_op_box);
 394     gtk_widget_hide(fvdl->f_value_field);
 395     gtk_widget_hide(fvdl->f_logical_op_box);
 396  }
 397
 398 }
 399
 400 /**
 401  *  @fn void gui_filter_line_reset(FilterViewerDataLine*)
 402  *
 403  *  Sets selections of all boxes in current FilterViewerDataLine
 404  *  to default value (0)
 405  *  @param fvdl pointer to current FilterViewerDataLine
 406  */
 407 void
 408 gui_filter_line_reset(FilterViewerDataLine *fvdl) {
 409
 410   gtk_combo_box_set_active(GTK_COMBO_BOX(fvdl->f_not_op_box),0);
 411   gtk_combo_box_set_active(GTK_COMBO_BOX(fvdl->f_field_box),0);
 412   gtk_combo_box_set_active(GTK_COMBO_BOX(fvdl->f_math_op_box),0);
 413   gtk_entry_set_text(GTK_ENTRY(fvdl->f_value_field),"");
 414   gtk_combo_box_set_active(GTK_COMBO_BOX(fvdl->f_logical_op_box),0);
 415 }
 416
 417 /**
 418  *  @fn void gui_filter_destructor(FilterViewerData*)
 419  *
 420  *  Destructor for the filter gui module
 421  *  @param fvd The module structure
 422  */
 423 void
 424 gui_filter_destructor(FilterViewerData *fvd)
 425 {
 426   /* May already been done by GTK window closing */
 427   if(GTK_IS_WIDGET(guifilter_get_widget(fvd))){
 428     g_info("widget still exists");
 429   }
 430 //  if(tab != NULL) {
 431 //    lttvwindow_unregister_traceset_notify(fvd->tab,
 432 //                                          filter_traceset_changed,
 433 //                                          filter_viewer_data);
 434 //  }
 435   lttvwindowtraces_background_notify_remove(fvd);
 436
 437   g_filter_list = g_slist_remove(g_filter_list, fvd);
 438
 439   g_free(fvd);
 440 }
 441
 442
 443 /**
 444  *  @fn GtkWidget* h_guifilter(Tab*)
 445  *
 446  *  Filter Module's constructor hook
 447  *
 448  *  This constructor is given as a parameter to the menuitem and toolbar button
 449  *  registration. It creates the list.
 450  *  @param obj Object to interact with.
 451  *  @return The widget created.
 452  */
 453 GtkWidget *
 454 h_guifilter(LttvPlugin *plugin)
 455 {
 456   FilterViewerData* f = gui_filter(plugin) ;
 457
 458   return NULL;
 459 }
 460
 461 /**
 462  *  @fn static void init()
 463  *
 464  *  This function initializes the Filter Viewer functionnality through the
 465  *  gtkTraceSet API.
 466  */
 467 static void init() {
 468
 469   lttvwindow_register_constructor("guifilter",
 470                                   "/",
 471                                   "Insert Filter Module",
 472                                   hGuiFilterInsert_xpm,
 473                                   "Insert Filter Module",
 474                                   h_guifilter);
 475 }
 476
 477 /**
 478  *  @fn void filter_destroy_walk(gpointer,gpointer)
 479  *
 480  *  Initiate the destruction of the current gui module
 481  *  on the GTK Interface
 482  */
 483 void
 484 filter_destroy_walk(gpointer data, gpointer user_data)
 485 {
 486   FilterViewerData *fvd = (FilterViewerData*)data;
 487
 488   g_debug("CFV.c : filter_destroy_walk, %p", fvd);
 489
 490   /* May already have been done by GTK window closing */
 491   if(GTK_IS_WIDGET(guifilter_get_widget(fvd)))
 492     gtk_widget_destroy(guifilter_get_widget(fvd));
 493 }
 494
 495 /**
 496  *  @fn static void destroy()
 497  *  @brief plugin's destroy function
 498  *
 499  *  This function releases the memory reserved by the module and unregisters
 500  *  everything that has been registered in the gtkTraceSet API.
 501  */
 502 static void destroy() {
 503
 504   g_slist_foreach(g_filter_list, filter_destroy_walk, NULL );
 505
 506   lttvwindow_unregister_constructor(h_guifilter);
 507
 508 }
 509
 510 /**
 511  *  @fn void callback_process_button(GtkWidget*,gpointer)
 512  *
 513  *  The Process Button callback function
 514  *  @param widget The Button widget passed to the callback function
 515  *  @param data Data sent along with the callback function
 516  */
 517 void
 518 callback_process_button(GtkWidget *widget, gpointer data) {
 519
 520   g_debug("callback_process_button(): Processing expression");
 521
 522   FilterViewerData *fvd = (FilterViewerData*)data;
 523   LttvFilter* filter;
 524
 525   if(strlen(gtk_entry_get_text(GTK_ENTRY(fvd->f_expression_field))) !=0) {
 526     filter = lttv_filter_new();
 527     GString* s = g_string_new(gtk_entry_get_text(GTK_ENTRY(fvd->f_expression_field)));
 528     lttv_filter_append_expression(filter,s->str);
 529     g_string_free(s,TRUE);
 530   } else {
 531     filter = NULL;
 532   }
 533   /* Remove the old filter if present */
 534   //g_object_set_data_full(fvd->obj, "filter", filter,
 535   //                      (GDestroyNotify)lttv_filter_destroy);
 536   //g_object_notify(fvd->obj, "filter");
 537   lttv_plugin_update_filter(fvd->plugin, filter);
 538 }
 539
 540 gboolean callback_enter_check(GtkWidget *widget,
 541     GdkEventKey *event,
 542     gpointer user_data)
 543 {
 544  g_debug("typed : %x", event->keyval);
 545  switch(event->keyval) {
 546    case GDK_Return:
 547    case GDK_KP_Enter:
 548    case GDK_ISO_Enter:
 549    case GDK_3270_Enter:
 550      callback_process_button(widget, user_data);
 551      break;
 552    default:
 553      break;
 554  }
 555  return FALSE;
 556 }
 557
 558 /**
 559  *  @fn void callback_expression_field(GtkWidget*,gpointer)
 560  *
 561  *  The Add Button callback function
 562  *  @param widget The Button widget passed to the callback function
 563  *  @param data Data sent along with the callback function
 564  */
 565 void
 566 callback_expression_field(GtkWidget *widget, gpointer data) {
 567
 568   FilterViewerData *fvd = (FilterViewerData*)data;
 569
 570   if(strlen(gtk_entry_get_text(GTK_ENTRY(fvd->f_expression_field))) !=0) {
 571     gtk_widget_show(fvd->f_logical_op_junction_box);
 572   } else {
 573     gtk_widget_hide(fvd->f_logical_op_junction_box);
 574   }
 575 }
 576
 577
 578 /**
 579  *  @fn void callback_add_button(GtkWidget*,gpointer)
 580  *
 581  *  The Add Button callback function
 582  *  @param widget The Button widget passed to the callback function
 583  *  @param data Data sent along with the callback function
 584  */
 585 void
 586 callback_add_button(GtkWidget *widget, gpointer data) {
 587
 588   g_debug("callback_add_button(): processing simple expressions");
 589
 590   unsigned i;
 591
 592   FilterViewerData *fvd = (FilterViewerData*)data;
 593   FilterViewerDataLine *fvdl = NULL;
 594   GString* a_filter_string = g_string_new("");
 595
 596   /*
 597    * adding linking operator to
 598    * string
 599    */
 600   GString* s;
 601   s = g_ptr_array_index(fvd->f_logical_op_options,gtk_combo_box_get_active(GTK_COMBO_BOX(fvd->f_logical_op_junction_box)));
 602   a_filter_string = g_string_append(a_filter_string,s->str);
 603   gtk_combo_box_set_active(GTK_COMBO_BOX(fvd->f_logical_op_junction_box),0);
 604
 605   /* begin expression */
 606   a_filter_string = g_string_append_c(a_filter_string,'(');
 607
 608   /*
 609    * For each simple expression, add the resulting string
 610    * to the filter string
 611    *
 612    * Each simple expression takes the following schema
 613    * [not operator '!',' '] [field type] [math operator '<','<=','>','>=','=','!='] [value]
 614    */
 615   for(i=0;i<fvd->f_lines->len;i++) {
 616     fvdl = (FilterViewerDataLine*)g_ptr_array_index(fvd->f_lines,i);
 617
 618     s = g_ptr_array_index(fvd->f_not_op_options,gtk_combo_box_get_active(GTK_COMBO_BOX(fvdl->f_not_op_box)));
 619     a_filter_string = g_string_append(a_filter_string,s->str);
 620
 621     s = g_ptr_array_index(fvd->f_field_options,gtk_combo_box_get_active(GTK_COMBO_BOX(fvdl->f_field_box)));
 622     a_filter_string = g_string_append(a_filter_string,s->str);
 623
 624     s = g_ptr_array_index(fvd->f_math_op_options,gtk_combo_box_get_active(GTK_COMBO_BOX(fvdl->f_math_op_box)));
 625     a_filter_string = g_string_append(a_filter_string,s->str);
 626
 627     a_filter_string = g_string_append(a_filter_string,gtk_entry_get_text(GTK_ENTRY(fvdl->f_value_field)));
 628
 629     s = g_ptr_array_index(fvd->f_logical_op_options,gtk_combo_box_get_active(GTK_COMBO_BOX(fvdl->f_logical_op_box)));
 630     a_filter_string = g_string_append(a_filter_string,s->str);
 631
 632     /*
 633      * resetting simple expression lines
 634      */
 635     gui_filter_line_reset(fvdl);
 636     if(i) gui_filter_line_set_visible(fvdl,FALSE); // Only keep the first line
 637   }
 638
 639   /* end expression */
 640   a_filter_string = g_string_append_c(a_filter_string,')');
 641
 642   g_string_prepend(a_filter_string,gtk_entry_get_text(GTK_ENTRY(fvd->f_expression_field)));
 643   gtk_entry_set_text(GTK_ENTRY(fvd->f_expression_field),a_filter_string->str);
 644
 645 }
 646
 647 /**
 648  *  @fn void callback_logical_op_box(GtkWidget*,gpointer)
 649  *
 650  *  The logical op box callback function
 651  *  @param widget The Button widget passed to the callback function
 652  *  @param data Data sent along with the callback function
 653  */
 654 void
 655 callback_logical_op_box(GtkWidget *widget, gpointer data) {
 656
 657   g_debug("callback_logical_op_box(): adding new simple expression");
 658
 659   FilterViewerData *fvd = (FilterViewerData*)data;
 660   FilterViewerDataLine *fvdl = NULL;
 661
 662   int i;
 663   for(i=0;i<fvd->f_lines->len;i++) {
 664     fvdl = (FilterViewerDataLine*)g_ptr_array_index(fvd->f_lines,i);
 665     if(fvdl->f_logical_op_box == widget) {
 666       if(gtk_combo_box_get_active(GTK_COMBO_BOX(fvdl->f_logical_op_box)) == 0) return;
 667       if(i==fvd->f_lines->len-1) {  /* create a new line */
 668         fvd->rows++;
 669         FilterViewerDataLine* fvdl2 = gui_filter_add_line(fvd);
 670         g_ptr_array_add(fvd->f_lines,(gpointer) fvdl2);
 671       } else {
 672         FilterViewerDataLine *fvdl2 = (FilterViewerDataLine*)g_ptr_array_index(fvd->f_lines,i+1);
 673         if(!fvdl2->visible) gui_filter_line_set_visible(fvdl2,TRUE);
 674       }
 675     }
 676   }
 677
 678 }
 679
 680 LTTV_MODULE("guifilter", "Filter window", \
 681     "Graphical module that let user specify their filtering options", \
 682     init, destroy, "lttvwindow")
 683