Viewing file:  gnomelayout.cpp (8.5 KB) -rw-r--r--
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/*
*******************************************************************************
*
* © 2016 and later: Unicode, Inc. and others.
* License & terms of use: http://www.unicode.org/copyright.html#License
*
*******************************************************************************
****************************************************************************** *
*
* Copyright (C) 1999-2007, International Business Machines
* Corporation and others. All Rights Reserved.
*
****************************************************************************** *
* file name: gnomelayout.cpp
*
* created on: 09/04/2001
* created by: Eric R. Mader
*/
#include <gnome.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include "unicode/ustring.h"
#include "unicode/uscript.h"
#include "GnomeFontInstance.h"
#include "paragraph.h"
#include "GnomeGUISupport.h"
#include "GnomeFontMap.h"
#include "UnicodeReader.h"
#include "ScriptCompositeFontInstance.h"
#define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
struct Context
{
long width;
long height;
Paragraph *paragraph;
};
static FT_Library engine;
static GnomeGUISupport *guiSupport;
static GnomeFontMap *fontMap;
static ScriptCompositeFontInstance *font;
static GSList *appList = NULL;
GtkWidget *newSample(const gchar *fileName);
void closeSample(GtkWidget *sample);
void showabout(GtkWidget */*widget*/, gpointer /*data*/)
{
GtkWidget *aboutBox;
const gchar *documentedBy[] = {NULL};
const gchar *writtenBy[] = {
"Eric Mader",
NULL
};
aboutBox = gnome_about_new("Gnome Layout Sample",
"0.1",
"Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
"A simple demo of the ICU LayoutEngine.",
writtenBy,
documentedBy,
"",
NULL);
gtk_widget_show(aboutBox);
}
void notimpl(GtkObject */*object*/, gpointer /*data*/)
{
gnome_ok_dialog("Not implemented...");
}
gchar *prettyTitle(const gchar *path)
{
const gchar *name = g_basename(path);
gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
return title;
}
void openOK(GtkObject */*object*/, gpointer data)
{
GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
gchar *fileName = g_strdup(gtk_file_selection_get_filename(fileselection));
Paragraph *newPara;
gtk_widget_destroy(GTK_WIDGET(fileselection));
newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
if (newPara != NULL) {
gchar *title = prettyTitle(fileName);
GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
if (context->paragraph != NULL) {
delete context->paragraph;
}
context->paragraph = newPara;
gtk_window_set_title(GTK_WINDOW(app), title);
gtk_widget_hide(area);
context->paragraph->breakLines(context->width, context->height);
gtk_widget_show_all(area);
g_free(title);
}
g_free(fileName);
}
void openfile(GtkObject */*object*/, gpointer data)
{
GtkWidget *app = GTK_WIDGET(data);
GtkWidget *fileselection;
GtkWidget *okButton;
GtkWidget *cancelButton;
fileselection =
gtk_file_selection_new("Open File");
gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
okButton =
GTK_FILE_SELECTION(fileselection)->ok_button;
cancelButton =
GTK_FILE_SELECTION(fileselection)->cancel_button;
gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
GTK_SIGNAL_FUNC(openOK), fileselection);
gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
gtk_widget_show(fileselection);
gtk_main();
}
void newapp(GtkObject */*object*/, gpointer /*data*/)
{
GtkWidget *app = newSample("Sample.txt");
gtk_widget_show_all(app);
}
void closeapp(GtkWidget */*widget*/, gpointer data)
{
GtkWidget *app = GTK_WIDGET(data);
closeSample(app);
}
void shutdown(GtkObject */*object*/, gpointer /*data*/)
{
gtk_main_quit();
}
GnomeUIInfo fileMenu[] =
{
GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
(gchar *) "Create a new Gnome Layout Sample",
newapp, NULL),
GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
GNOMEUIINFO_SEPARATOR,
GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
GNOMEUIINFO_END
};
GnomeUIInfo helpMenu[] =
{
// GNOMEUIINFO_HELP("gnomelayout"),
GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
GNOMEUIINFO_END
};
GnomeUIInfo mainMenu[] =
{
GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
GNOMEUIINFO_END
};
gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
{
closeSample(widget);
// indicate that closeapp already destroyed the window
return TRUE;
}
gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
{
if (context->paragraph != NULL) {
context->width = event->width;
context->height = event->height;
if (context->width > 0 && context->height > 0) {
context->paragraph->breakLines(context->width, context->height);
}
}
return TRUE;
}
gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
{
if (context->paragraph != NULL) {
gint maxLines = context->paragraph->getLineCount() - 1;
gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
GnomeSurface surface(widget);
context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
}
return TRUE;
}
GtkWidget *newSample(const gchar *fileName)
{
Context *context = new Context();
context->width = 600;
context->height = 400;
context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
gchar *title = prettyTitle(fileName);
GtkWidget *app = gnome_app_new("gnomeLayout", title);
gtk_object_set_data(GTK_OBJECT(app), "context", context);
gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
gtk_signal_connect(GTK_OBJECT(app), "delete_event",
GTK_SIGNAL_FUNC(eventDelete), NULL);
GtkWidget *area = gtk_drawing_area_new();
gtk_object_set_data(GTK_OBJECT(app), "area", area);
GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
for (int i = 0; i < 5; i += 1) {
style->fg[i] = style->white;
}
gtk_widget_set_style(area, style);
gnome_app_set_contents(GNOME_APP(app), area);
gtk_signal_connect(GTK_OBJECT(area),
"expose_event",
GTK_SIGNAL_FUNC(eventExpose),
context);
gtk_signal_connect(GTK_OBJECT(area),
"configure_event",
GTK_SIGNAL_FUNC(eventConfigure),
context);
appList = g_slist_prepend(appList, app);
g_free(title);
return app;
}
void closeSample(GtkWidget *app)
{
Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
if (context->paragraph != NULL) {
delete context->paragraph;
}
delete context;
appList = g_slist_remove(appList, app);
gtk_widget_destroy(app);
if (appList == NULL) {
gtk_main_quit();
}
}
int main (int argc, char *argv[])
{
LEErrorCode fontStatus = LE_NO_ERROR;
poptContext ptctx;
GtkWidget *app;
FT_Init_FreeType(&engine);
gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
guiSupport = new GnomeGUISupport();
fontMap = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
font = new ScriptCompositeFontInstance(fontMap);
if (LE_FAILURE(fontStatus)) {
FT_Done_FreeType(engine);
return 1;
}
const char *defaultArgs[] = {"Sample.txt", NULL};
const char **args = poptGetArgs(ptctx);
if (args == NULL) {
args = defaultArgs;
}
for (int i = 0; args[i] != NULL; i += 1) {
app = newSample(args[i]);
gtk_widget_show_all(app);
}
poptFreeContext(ptctx);
gtk_main();
delete font;
delete guiSupport;
FT_Done_FreeType(engine);
exit(0);
}
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