+#include <gtk/gtk.h>
+
+#include "vikwindow.h"
+#include "viklayerspanel.h"
+#include "vikviewport.h"
+
+typedef struct _VikDataSourceInterface VikDataSourceInterface;
+
+/* global data structure used to expose the progress dialog to the worker thread */
+typedef struct {
+ GtkWidget *status;
+ VikWindow *vw;
+ VikLayersPanel *vlp;
+ VikViewport *vvp;
+ GtkWidget *dialog;
+ gboolean ok; /* if OK is false when we exit, we MUST free w */
+ VikDataSourceInterface *interface;
+ gpointer user_data;
+} acq_dialog_widgets_t;
+
+typedef enum { VIK_DATASOURCE_GPSBABEL_DIRECT, VIK_DATASOURCE_SHELL_CMD } vik_datasource_type_t;
+typedef enum { VIK_DATASOURCE_CREATENEWLAYER, VIK_DATASOURCE_ADDTOLAYER } vik_datasource_mode_t;
+
+
+/* returns pointer to state if OK, otherwise NULL */
+typedef gpointer (*VikDataSourceInitFunc) ();
+
+/* returns NULL if OK, otherwise returns an error message. */
+typedef gchar *(*VikDataSourceCheckExistenceFunc) ();
+
+/* Create widgets to show in a setup dialog, set up state via user_data */
+typedef void (*VikDataSourceAddSetupWidgetsFunc) ( GtkWidget *dialog, VikViewport *vvp, gpointer user_data );
+
+/* if VIK_DATASOURCE_GPSBABEL_DIRECT, babelargs and inputfile.
+ if VIK_DATASOURCE_SHELL_CMD, shellcmd and inputtype.
+ set both to NULL to signal refusal (ie already downloading) */
+typedef void (*VikDataSourceGetCmdStringFunc) ( gpointer user_data, gchar **babelargs_or_shellcmd, gchar **inputfile_or_inputtype );
+
+/* */
+typedef void (*VikDataSourceProgressFunc) (gpointer c, gpointer data, acq_dialog_widgets_t *w);
+
+/* Creates widgets to show in a progress dialog, may set up state via user_data */
+typedef void (*VikDataSourceAddProgressWidgetsFunc) ( GtkWidget *dialog, gpointer user_data );
+
+/* Frees any widgets created for the setup or progress dialogs, any allocated state, etc. */
+typedef void (*VikDataSourceCleanupFunc) ( gpointer user_data );
+
+
+struct _VikDataSourceInterface {
+ const gchar *window_title;
+ const gchar *layer_title;
+ vik_datasource_type_t type;
+ vik_datasource_type_t mode;
+
+ VikDataSourceInitFunc init_func;
+ VikDataSourceCheckExistenceFunc check_existence_func;
+ VikDataSourceAddSetupWidgetsFunc add_setup_widgets_func;
+ VikDataSourceGetCmdStringFunc get_cmd_string_func;
+
+ VikDataSourceProgressFunc progress_func;
+ VikDataSourceAddProgressWidgetsFunc add_progress_widgets_func;
+ VikDataSourceCleanupFunc cleanup_func;
+};
+
+
+void a_acquire ( VikWindow *vw, VikLayersPanel *vlp, VikViewport *vvp, VikDataSourceInterface *interface );