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POValidate format of the string typed in gtk_entry
 

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  1. POValidate format of the string typed in gtk_entry
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    <p>I need to write a function that will validate device name typed by user in gtk entry field.</p> <p>Device must be in the following form:</p> <pre><code>"/dev/video + one digits" ( e.g. /dev/video1 ) </code></pre> <p>For this I made function but I don't now how to write condition</p> <pre><code>void validate_device_cb (GtkEntry* entry, const gchar* text, gint length, gint* position, gpointer data) { GtkEditable *editable = GTK_EDITABLE (entry); int i, count = 0; gchar *result = g_new (gchar, length); for (i = 0; i &lt; length; i++) { /* insert condition here */ continue; result[count++] = text[i]; } if (count &gt; 0) { g_signal_handlers_block_by_func (G_OBJECT (editable), G_CALLBACK (validate_device_cb), data); gtk_editable_insert_text (editable, result, count, position); g_signal_handlers_unblock_by_func (G_OBJECT (editable), G_CALLBACK (validate_device_cb), data); } g_signal_stop_emission_by_name (G_OBJECT (editable), "insert_text"); g_free (result); } </code></pre> <p>Any help are welcome Best regards</p> <p>UPDATE ( more explication)</p> <p>gtk entry must should accept only this chars typed:</p> <pre><code>first typed: '/' second 'd' third 'e' fourth 'v' fifth '/' sixth 'v' seventh 'i' eight 'd' ......... eleven digit twelve digit </code></pre> <p>setting device entry:</p> <pre><code>video_device = gtk_entry_new_with_max_length(12); gtk_editable_set_editable(GTK_EDITABLE(video_device),TRUE); g_signal_connect(G_OBJECT(video_device), "insert_text" , G_CALLBACK(validate_device_cb), NULL); </code></pre>
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