From: Andreas Eversberg <jolly@eversberg.eu>
Date: Fri, 1 May 2015 11:15:43 +0000 (+0200)
Subject: Ask before overwriting colorized image
X-Git-Url: http://git.eversberg.eu/gitweb.cgi?p=colorize.git;a=commitdiff_plain;h=6967ad17908c3381dd43f2d82e4a09dc7d3776fa

Ask before overwriting colorized image
---

diff --git a/gui/colorize.c b/gui/colorize.c
index 8a321b0..e604288 100644
--- a/gui/colorize.c
+++ b/gui/colorize.c
@@ -57,6 +57,7 @@ static void save_event(gpointer *priv)
 	struct colorize_priv *cp = (struct colorize_priv *) priv;
 	GtkWidget *dialog;
 	char *filename = NULL;
+	FILE *fp;
 
 	dialog = gtk_file_chooser_dialog_new("Select file to save colorized image",
 		GTK_WINDOW(main_window),
@@ -76,8 +77,25 @@ static void save_event(gpointer *priv)
 	if (!filename)
 		return;
 
-	printf("alpha=%d\n", cp->alpha);
+	if ((fp = fopen(filename, "r"))) {
+		int ret;
+		fclose(fp);
+		GtkWidget *dialog = gtk_message_dialog_new (GTK_WINDOW(main_window),
+			GTK_DIALOG_DESTROY_WITH_PARENT,
+			GTK_MESSAGE_ERROR,
+			GTK_BUTTONS_OK_CANCEL,
+			"Image already exists, overwrite it?");
+		ret = gtk_dialog_run(GTK_DIALOG (dialog));
+		gtk_widget_destroy(dialog);
+		if (ret != GTK_RESPONSE_OK)
+			goto exit;
+	}
+
+
 	save_img(cp->img, cp->width, cp->height, cp->alpha, filename, 0);
+
+exit:
+	free(filename);
 }
 
 static void dummy_event(gpointer *priv)