icuSources/samples/layout/gnomelayout.cpp

   1
   2 /*
   3  ****************************************************************************** *
   4  *
   5  *   Copyright (C) 1999-2005, 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 "freetype/freetype.h"
  17
  18 #include "unicode/ustring.h"
  19 #include "unicode/uscript.h"
  20
  21 #include "GnomeFontInstance.h"
  22
  23 #include "paragraph.h"
  24
  25 #include "GnomeGUISupport.h"
  26 #include "GnomeFontMap.h"
  27 #include "UnicodeReader.h"
  28 #include "ScriptCompositeFontInstance.h"
  29
  30 #define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
  31
  32 struct Context
  33 {
  34     long width;
  35     long height;
  36     Paragraph *paragraph;
  37 };
  38
  39 static TT_Engine engine;
  40 static GnomeGUISupport *guiSupport;
  41 static GnomeFontMap *fontMap;
  42 static ScriptCompositeFontInstance *font;
  43
  44 static GSList *appList = NULL;
  45
  46 GtkWidget *newSample(const gchar *fileName);
  47 void       closeSample(GtkWidget *sample);
  48
  49 void showabout(GtkWidget */*widget*/, gpointer /*data*/)
  50 {
  51     GtkWidget *aboutBox;
  52     const gchar *writtenBy[] = {
  53         "Eric Mader",
  54         NULL
  55     };
  56
  57     aboutBox = gnome_about_new("Gnome Layout Sample",
  58                                "0.1",
  59                                "Copyright (C) 1998-2002 By International Business Machines Corporation and others. All Rights Reserved.",
  60                                writtenBy,
  61                                "A simple demo of the ICU LayoutEngine.",
  62                                NULL);
  63
  64     gtk_widget_show(aboutBox);
  65 }
  66
  67 void notimpl(GtkObject */*object*/, gpointer /*data*/)
  68 {
  69     gnome_ok_dialog("Not implemented...");
  70 }
  71
  72 gchar *prettyTitle(const gchar *path)
  73 {
  74   gchar *name  = g_basename(path);
  75   gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
  76
  77   return title;
  78 }
  79
  80 void openOK(GtkObject */*object*/, gpointer data)
  81 {
  82   GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
  83   GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
  84   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
  85   gchar *fileName  = g_strdup(gtk_file_selection_get_filename(fileselection));
  86   Paragraph *newPara;
  87
  88   gtk_widget_destroy(GTK_WIDGET(fileselection));
  89
  90   newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
  91
  92   if (newPara != NULL) {
  93     gchar *title = prettyTitle(fileName);
  94     GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
  95
  96     if (context->paragraph != NULL) {
  97       delete context->paragraph;
  98     }
  99
 100     context->paragraph = newPara;
 101     gtk_window_set_title(GTK_WINDOW(app), title);
 102
 103     gtk_widget_hide(area);
 104     context->paragraph->breakLines(context->width, context->height);
 105     gtk_widget_show_all(area);
 106
 107     g_free(title);
 108   }
 109
 110   g_free(fileName);
 111 }
 112
 113 void openfile(GtkObject */*object*/, gpointer data)
 114 {
 115   GtkWidget *app = GTK_WIDGET(data);
 116   GtkWidget *fileselection;
 117   GtkWidget *okButton;
 118   GtkWidget *cancelButton;
 119
 120   fileselection =
 121     gtk_file_selection_new("Open File");
 122
 123   gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
 124
 125   okButton =
 126     GTK_FILE_SELECTION(fileselection)->ok_button;
 127
 128   cancelButton =
 129     GTK_FILE_SELECTION(fileselection)->cancel_button;
 130
 131   gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
 132                      GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
 133
 134   gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
 135                      GTK_SIGNAL_FUNC(openOK), fileselection);
 136
 137   gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
 138                      GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
 139
 140   gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
 141   gtk_widget_show(fileselection);
 142   gtk_main();
 143 }
 144
 145 void newapp(GtkObject */*object*/, gpointer /*data*/)
 146 {
 147   GtkWidget *app = newSample("Sample.txt");
 148
 149   gtk_widget_show_all(app);
 150 }
 151
 152 void closeapp(GtkWidget */*widget*/, gpointer data)
 153 {
 154   GtkWidget *app = GTK_WIDGET(data);
 155
 156   closeSample(app);
 157 }
 158
 159 void shutdown(GtkObject */*object*/, gpointer /*data*/)
 160 {
 161     gtk_main_quit();
 162 }
 163
 164 GnomeUIInfo fileMenu[] =
 165 {
 166   GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
 167                             (gchar *) "Create a new Gnome Layout Sample",
 168                             newapp, NULL),
 169
 170   GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
 171   GNOMEUIINFO_SEPARATOR,
 172   GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
 173   GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
 174   GNOMEUIINFO_END
 175 };
 176
 177 GnomeUIInfo helpMenu[] =
 178 {
 179     // GNOMEUIINFO_HELP("gnomelayout"),
 180     GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
 181     GNOMEUIINFO_END
 182 };
 183
 184 GnomeUIInfo mainMenu[] =
 185 {
 186     GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
 187     GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
 188     GNOMEUIINFO_END
 189 };
 190
 191 gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
 192 {
 193   closeSample(widget);
 194
 195   // indicate that closeapp  already destroyed the window
 196   return TRUE;
 197 }
 198
 199 gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
 200 {
 201   if (context->paragraph != NULL) {
 202     context->width  = event->width;
 203     context->height = event->height;
 204
 205     if (context->width > 0 && context->height > 0) {
 206         context->paragraph->breakLines(context->width, context->height);
 207     }
 208   }
 209
 210   return TRUE;
 211 }
 212
 213 gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
 214 {
 215   if (context->paragraph != NULL) {
 216     gint maxLines = context->paragraph->getLineCount() - 1;
 217     gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
 218     GnomeSurface surface(widget);
 219
 220     context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
 221   }
 222
 223   return TRUE;
 224 }
 225
 226 GtkWidget *newSample(const gchar *fileName)
 227 {
 228   Context   *context = new Context();
 229
 230   context->width  = 600;
 231   context->height = 400;
 232   context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
 233
 234   gchar *title = prettyTitle(fileName);
 235   GtkWidget *app = gnome_app_new("gnomeLayout", title);
 236
 237   gtk_object_set_data(GTK_OBJECT(app), "context", context);
 238
 239   gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
 240
 241   gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
 242
 243   gtk_signal_connect(GTK_OBJECT(app), "delete_event",
 244                      GTK_SIGNAL_FUNC(eventDelete), NULL);
 245
 246   GtkWidget *area = gtk_drawing_area_new();
 247   gtk_object_set_data(GTK_OBJECT(app), "area", area);
 248
 249   GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
 250
 251   for (int i = 0; i < 5; i += 1) {
 252     style->fg[i] = style->white;
 253   }
 254
 255   gtk_widget_set_style(area, style);
 256
 257   gnome_app_set_contents(GNOME_APP(app), area);
 258
 259   gtk_signal_connect(GTK_OBJECT(area),
 260                      "expose_event",
 261                      GTK_SIGNAL_FUNC(eventExpose),
 262                      context);
 263
 264   gtk_signal_connect(GTK_OBJECT(area),
 265                      "configure_event",
 266                      GTK_SIGNAL_FUNC(eventConfigure),
 267                      context);
 268
 269   appList = g_slist_prepend(appList, app);
 270
 271   g_free(title);
 272
 273   return app;
 274 }
 275
 276 void closeSample(GtkWidget *app)
 277 {
 278   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
 279
 280   if (context->paragraph != NULL) {
 281     delete context->paragraph;
 282   }
 283
 284   delete context;
 285
 286   appList = g_slist_remove(appList, app);
 287
 288   gtk_widget_destroy(app);
 289
 290   if (appList == NULL) {
 291     gtk_main_quit();
 292   }
 293 }
 294
 295 int main (int argc, char *argv[])
 296 {
 297     LEErrorCode   fontStatus = LE_NO_ERROR;
 298     GtkWidget     *app;
 299
 300     TT_Init_FreeType(&engine);
 301
 302     gnome_init("gnomelayout", "0.1", argc, argv);
 303
 304     guiSupport = new GnomeGUISupport();
 305     fontMap    = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
 306     font       = new ScriptCompositeFontInstance(fontMap);
 307
 308     if (LE_FAILURE(fontStatus)) {
 309         TT_Done_FreeType(engine);
 310         return 1;
 311     }
 312
 313     if (argc <= 1) {
 314       app = newSample("Sample.txt");
 315
 316       gtk_widget_show_all(app);
 317     } else {
 318       for (int i = 1; i < argc; i += 1) {
 319         app = newSample(argv[i]);
 320
 321         gtk_widget_show_all(app);
 322       }
 323     }
 324
 325     gtk_main();
 326
 327     delete font;
 328     delete guiSupport;
 329
 330     TT_Done_FreeType(engine);
 331
 332     exit(0);
 333 }