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Turtel

Could anyone give a small example to show how to open a file and write data on to it through press of a button.............??

tadeboro · Posted: Sat Mar 20, 2010 1:03 am Post subject:

Hello.

This crude sample should get you up-and-going, but be aware that my code doesn't check for any errors that may occur while saving, loading ... Be careful when using this application, since it'll overwrite any file you designate as a save location.

And the code:

Code: (C)

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#include <gtk/gtk.h>

typedef struct _Data
{
GtkWidget *main_window;
GtkTextBuffer *buffer;
}
Data;

static void
cb_open( GtkButton *button,
Data *data )
{
GtkWidget *dialog;

dialog = gtk_file_chooser_dialog_new( "Open file",
GTK_WINDOW( data->main_window ),
GTK_FILE_CHOOSER_ACTION_OPEN,
GTK_STOCK_OPEN, GTK_RESPONSE_OK,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
NULL );
if( GTK_RESPONSE_OK == gtk_dialog_run( GTK_DIALOG( dialog ) ) )
{
gchar *filename;
gchar *string;

filename = gtk_file_chooser_get_filename( GTK_FILE_CHOOSER( dialog ) );
g_file_get_contents( filename, &string, NULL, NULL );
g_object_set( G_OBJECT( data->buffer ), "text", string, NULL );
g_free( filename );
g_free( string );
}
gtk_widget_destroy( dialog );
}

static void
cb_save( GtkButton *button,
Data *data )
{
GtkWidget *dialog;

dialog = gtk_file_chooser_dialog_new( "Save file",
GTK_WINDOW( data->main_window ),
GTK_FILE_CHOOSER_ACTION_SAVE,
GTK_STOCK_SAVE, GTK_RESPONSE_OK,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
NULL );
if( GTK_RESPONSE_OK == gtk_dialog_run( GTK_DIALOG( dialog ) ) )
{
gchar *filename;
gchar *string;

filename = gtk_file_chooser_get_filename( GTK_FILE_CHOOSER( dialog ) );
g_object_get( G_OBJECT( data->buffer ), "text", &string, NULL );
g_file_set_contents( filename, string, -1, NULL );
g_free( filename );
g_free( string );
}
gtk_widget_destroy( dialog );
}

int
main( int argc,
char **argv )
{
GtkWidget *window,
*table,
*swindow,
*text,
*button;
Data *data;

gtk_init( &argc, &argv );

data = g_slice_new0( Data );

window = gtk_window_new( GTK_WINDOW_TOPLEVEL );
g_signal_connect( G_OBJECT( window ), "destroy",
G_CALLBACK( gtk_main_quit ), NULL );

table = gtk_table_new( 2, 2, FALSE );
gtk_container_add( GTK_CONTAINER( window ), table );

swindow = gtk_scrolled_window_new( NULL, NULL );
gtk_table_attach( GTK_TABLE( table ), swindow, 0, 2, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0 );

text = gtk_text_view_new();
gtk_container_add( GTK_CONTAINER( swindow ), text );
data->buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW( text ) );

button = gtk_button_new_from_stock( GTK_STOCK_OPEN );
g_signal_connect( G_OBJECT( button ), "clicked",
G_CALLBACK( cb_open ), data );
gtk_table_attach( GTK_TABLE( table ), button, 0, 1, 1, 2,
GTK_FILL, GTK_FILL, 0, 0 );

button = gtk_button_new_from_stock( GTK_STOCK_SAVE_AS );
g_signal_connect( G_OBJECT( button ), "clicked",
G_CALLBACK( cb_save ), data );
gtk_table_attach( GTK_TABLE( table ), button, 1, 2, 1, 2,
GTK_FILL, GTK_FILL, 0, 0 );

gtk_widget_show_all( window );

gtk_main();

g_slice_free( Data, data );

return( 0 );
}

Tadej

Turtel · Posted: Sat Mar 20, 2010 7:07 am Post subject:

thaks very much tadeboro ........ you shall be ever remembered for your cost free services to the open community.............hats off to you.