icuSources/samples/layout/gnomelayout.cpp

   1
   2 /*
   3  ****************************************************************************** *
   4  *
   5  *   Copyright (C) 1999-2007, International Business Machines
   6  *   Corporation and others.  All Rights Reserved.
   7  *
   8  ****************************************************************************** *
   9  *   file name:  gnomelayout.cpp
  10  *
  11  *   created on: 09/04/2001
  12  *   created by: Eric R. Mader
  13  */
  14
  15 #include <gnome.h>
  16 #include <ft2build.h>
  17 #include FT_FREETYPE_H
  18
  19 #include "unicode/ustring.h"
  20 #include "unicode/uscript.h"
  21
  22 #include "GnomeFontInstance.h"
  23
  24 #include "paragraph.h"
  25
  26 #include "GnomeGUISupport.h"
  27 #include "GnomeFontMap.h"
  28 #include "UnicodeReader.h"
  29 #include "ScriptCompositeFontInstance.h"
  30
  31 #define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
  32
  33 struct Context
  34 {
  35     long width;
  36     long height;
  37     Paragraph *paragraph;
  38 };
  39
  40 static FT_Library engine;
  41 static GnomeGUISupport *guiSupport;
  42 static GnomeFontMap *fontMap;
  43 static ScriptCompositeFontInstance *font;
  44
  45 static GSList *appList = NULL;
  46
  47 GtkWidget *newSample(const gchar *fileName);
  48 void       closeSample(GtkWidget *sample);
  49
  50 void showabout(GtkWidget */*widget*/, gpointer /*data*/)
  51 {
  52     GtkWidget *aboutBox;
  53     const gchar *documentedBy[] = {NULL};
  54     const gchar *writtenBy[] = {
  55         "Eric Mader",
  56         NULL
  57     };
  58
  59     aboutBox = gnome_about_new("Gnome Layout Sample",
  60                                "0.1",
  61                                "Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
  62                                "A simple demo of the ICU LayoutEngine.",
  63                                writtenBy,
  64                                documentedBy,
  65                                "",
  66                                NULL);
  67
  68     gtk_widget_show(aboutBox);
  69 }
  70
  71 void notimpl(GtkObject */*object*/, gpointer /*data*/)
  72 {
  73     gnome_ok_dialog("Not implemented...");
  74 }
  75
  76 gchar *prettyTitle(const gchar *path)
  77 {
  78   const gchar *name  = g_basename(path);
  79   gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
  80
  81   return title;
  82 }
  83
  84 void openOK(GtkObject */*object*/, gpointer data)
  85 {
  86   GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
  87   GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
  88   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
  89   gchar *fileName  = g_strdup(gtk_file_selection_get_filename(fileselection));
  90   Paragraph *newPara;
  91
  92   gtk_widget_destroy(GTK_WIDGET(fileselection));
  93
  94   newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
  95
  96   if (newPara != NULL) {
  97     gchar *title = prettyTitle(fileName);
  98     GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
  99
 100     if (context->paragraph != NULL) {
 101       delete context->paragraph;
 102     }
 103
 104     context->paragraph = newPara;
 105     gtk_window_set_title(GTK_WINDOW(app), title);
 106
 107     gtk_widget_hide(area);
 108     context->paragraph->breakLines(context->width, context->height);
 109     gtk_widget_show_all(area);
 110
 111     g_free(title);
 112   }
 113
 114   g_free(fileName);
 115 }
 116
 117 void openfile(GtkObject */*object*/, gpointer data)
 118 {
 119   GtkWidget *app = GTK_WIDGET(data);
 120   GtkWidget *fileselection;
 121   GtkWidget *okButton;
 122   GtkWidget *cancelButton;
 123
 124   fileselection =
 125     gtk_file_selection_new("Open File");
 126
 127   gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
 128
 129   okButton =
 130     GTK_FILE_SELECTION(fileselection)->ok_button;
 131
 132   cancelButton =
 133     GTK_FILE_SELECTION(fileselection)->cancel_button;
 134
 135   gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
 136                      GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
 137
 138   gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
 139                      GTK_SIGNAL_FUNC(openOK), fileselection);
 140
 141   gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
 142                      GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
 143
 144   gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
 145   gtk_widget_show(fileselection);
 146   gtk_main();
 147 }
 148
 149 void newapp(GtkObject */*object*/, gpointer /*data*/)
 150 {
 151   GtkWidget *app = newSample("Sample.txt");
 152
 153   gtk_widget_show_all(app);
 154 }
 155
 156 void closeapp(GtkWidget */*widget*/, gpointer data)
 157 {
 158   GtkWidget *app = GTK_WIDGET(data);
 159
 160   closeSample(app);
 161 }
 162
 163 void shutdown(GtkObject */*object*/, gpointer /*data*/)
 164 {
 165     gtk_main_quit();
 166 }
 167
 168 GnomeUIInfo fileMenu[] =
 169 {
 170   GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
 171                             (gchar *) "Create a new Gnome Layout Sample",
 172                             newapp, NULL),
 173
 174   GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
 175   GNOMEUIINFO_SEPARATOR,
 176   GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
 177   GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
 178   GNOMEUIINFO_END
 179 };
 180
 181 GnomeUIInfo helpMenu[] =
 182 {
 183     // GNOMEUIINFO_HELP("gnomelayout"),
 184     GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
 185     GNOMEUIINFO_END
 186 };
 187
 188 GnomeUIInfo mainMenu[] =
 189 {
 190     GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
 191     GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
 192     GNOMEUIINFO_END
 193 };
 194
 195 gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
 196 {
 197   closeSample(widget);
 198
 199   // indicate that closeapp  already destroyed the window
 200   return TRUE;
 201 }
 202
 203 gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
 204 {
 205   if (context->paragraph != NULL) {
 206     context->width  = event->width;
 207     context->height = event->height;
 208
 209     if (context->width > 0 && context->height > 0) {
 210         context->paragraph->breakLines(context->width, context->height);
 211     }
 212   }
 213
 214   return TRUE;
 215 }
 216
 217 gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
 218 {
 219   if (context->paragraph != NULL) {
 220     gint maxLines = context->paragraph->getLineCount() - 1;
 221     gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
 222     GnomeSurface surface(widget);
 223
 224     context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
 225   }
 226
 227   return TRUE;
 228 }
 229
 230 GtkWidget *newSample(const gchar *fileName)
 231 {
 232   Context   *context = new Context();
 233
 234   context->width  = 600;
 235   context->height = 400;
 236   context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
 237
 238   gchar *title = prettyTitle(fileName);
 239   GtkWidget *app = gnome_app_new("gnomeLayout", title);
 240
 241   gtk_object_set_data(GTK_OBJECT(app), "context", context);
 242
 243   gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
 244
 245   gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
 246
 247   gtk_signal_connect(GTK_OBJECT(app), "delete_event",
 248                      GTK_SIGNAL_FUNC(eventDelete), NULL);
 249
 250   GtkWidget *area = gtk_drawing_area_new();
 251   gtk_object_set_data(GTK_OBJECT(app), "area", area);
 252
 253   GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
 254
 255   for (int i = 0; i < 5; i += 1) {
 256     style->fg[i] = style->white;
 257   }
 258
 259   gtk_widget_set_style(area, style);
 260
 261   gnome_app_set_contents(GNOME_APP(app), area);
 262
 263   gtk_signal_connect(GTK_OBJECT(area),
 264                      "expose_event",
 265                      GTK_SIGNAL_FUNC(eventExpose),
 266                      context);
 267
 268   gtk_signal_connect(GTK_OBJECT(area),
 269                      "configure_event",
 270                      GTK_SIGNAL_FUNC(eventConfigure),
 271                      context);
 272
 273   appList = g_slist_prepend(appList, app);
 274
 275   g_free(title);
 276
 277   return app;
 278 }
 279
 280 void closeSample(GtkWidget *app)
 281 {
 282   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
 283
 284   if (context->paragraph != NULL) {
 285     delete context->paragraph;
 286   }
 287
 288   delete context;
 289
 290   appList = g_slist_remove(appList, app);
 291
 292   gtk_widget_destroy(app);
 293
 294   if (appList == NULL) {
 295     gtk_main_quit();
 296   }
 297 }
 298
 299 int main (int argc, char *argv[])
 300 {
 301     LEErrorCode   fontStatus = LE_NO_ERROR;
 302     poptContext   ptctx;
 303     GtkWidget    *app;
 304
 305     FT_Init_FreeType(&engine);
 306
 307     gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
 308
 309     guiSupport = new GnomeGUISupport();
 310     fontMap    = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
 311     font       = new ScriptCompositeFontInstance(fontMap);
 312
 313     if (LE_FAILURE(fontStatus)) {
 314         FT_Done_FreeType(engine);
 315         return 1;
 316     }
 317
 318     const char  *defaultArgs[] = {"Sample.txt", NULL};
 319     const char **args = poptGetArgs(ptctx);
 320
 321     if (args == NULL) {
 322         args = defaultArgs;
 323     }
 324
 325     for (int i = 0; args[i] != NULL; i += 1) {
 326        app = newSample(args[i]);
 327
 328        gtk_widget_show_all(app);
 329     }
 330
 331     poptFreeContext(ptctx);
 332
 333     gtk_main();
 334
 335     delete font;
 336     delete guiSupport;
 337
 338     FT_Done_FreeType(engine);
 339
 340     exit(0);
 341 }