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#define _DARWIN_C_SOURCE
#include "samples.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
/*
* This function looks up a label or key entry of
* a configuration widget.
* The functions descend recursively, so you can just
* specify the last component.
*/
static int
_lookup_widget(CameraWidget*widget, const char *key, CameraWidget **child) {
int ret;
ret = gp_widget_get_child_by_name (widget, key, child);
if (ret < GP_OK)
ret = gp_widget_get_child_by_label (widget, key, child);
return ret;
}
/* Gets a string configuration value.
* This can be:
* - A Text widget
* - The current selection of a Radio Button choice
* - The current selection of a Menu choice
*
* Sample (for Canons eg):
* get_config_value_string (camera, "owner", &ownerstr, context);
*/
int
get_config_value_string (Camera *camera, const char *key, char **str, GPContext *context) {
CameraWidget *widget = NULL, *child = NULL;
CameraWidgetType type;
int ret;
char *val;
ret = gp_camera_get_single_config (camera, key, &child, context);
if (ret == GP_OK) {
if (!child) fprintf(stderr,"child is NULL?\n");
widget = child;
} else {
ret = gp_camera_get_config (camera, &widget, context);
if (ret < GP_OK) {
fprintf (stderr, "camera_get_config failed: %d\n", ret);
return ret;
}
ret = _lookup_widget (widget, key, &child);
if (ret < GP_OK) {
fprintf (stderr, "lookup widget failed: %d\n", ret);
goto out;
}
}
/* This type check is optional, if you know what type the label
* has already. If you are not sure, better check. */
ret = gp_widget_get_type (child, &type);
if (ret < GP_OK) {
fprintf (stderr, "widget get type failed: %d\n", ret);
goto out;
}
switch (type) {
case GP_WIDGET_MENU:
case GP_WIDGET_RADIO:
case GP_WIDGET_TEXT:
break;
default:
fprintf (stderr, "widget has bad type %d\n", type);
ret = GP_ERROR_BAD_PARAMETERS;
goto out;
}
/* This is the actual query call. Note that we just
* a pointer reference to the string, not a copy... */
ret = gp_widget_get_value (child, &val);
if (ret < GP_OK) {
fprintf (stderr, "could not query widget value: %d\n", ret);
goto out;
}
/* Create a new copy for our caller. */
*str = strdup (val);
out:
gp_widget_free (widget);
return ret;
}
/* Sets a string configuration value.
* This can set for:
* - A Text widget
* - The current selection of a Radio Button choice
* - The current selection of a Menu choice
*
* Sample (for Canons eg):
* get_config_value_string (camera, "owner", &ownerstr, context);
*/
int
set_config_value_string (Camera *camera, const char *key, const char *val, GPContext *context) {
CameraWidget *widget = NULL, *child = NULL;
CameraWidgetType type;
int ret;
ret = gp_camera_get_config (camera, &widget, context);
if (ret < GP_OK) {
fprintf (stderr, "camera_get_config failed: %d\n", ret);
return ret;
}
ret = _lookup_widget (widget, key, &child);
if (ret < GP_OK) {
fprintf (stderr, "lookup widget failed: %d\n", ret);
goto out;
}
/* This type check is optional, if you know what type the label
* has already. If you are not sure, better check. */
ret = gp_widget_get_type (child, &type);
if (ret < GP_OK) {
fprintf (stderr, "widget get type failed: %d\n", ret);
goto out;
}
switch (type) {
case GP_WIDGET_MENU:
case GP_WIDGET_RADIO:
case GP_WIDGET_TEXT:
break;
default:
fprintf (stderr, "widget has bad type %d\n", type);
ret = GP_ERROR_BAD_PARAMETERS;
goto out;
}
/* This is the actual set call. Note that we keep
* ownership of the string and have to free it if necessary.
*/
ret = gp_widget_set_value (child, val);
if (ret < GP_OK) {
fprintf (stderr, "could not set widget value: %d\n", ret);
goto out;
}
ret = gp_camera_set_single_config (camera, key, child, context);
if (ret != GP_OK) {
/* This stores it on the camera again */
ret = gp_camera_set_config (camera, widget, context);
if (ret < GP_OK) {
fprintf (stderr, "camera_set_config failed: %d\n", ret);
return ret;
}
}
out:
gp_widget_free (widget);
return ret;
}
/*
* This enables/disables the specific canon capture mode.
*
* For non canons this is not required, and will just return
* with an error (but without negative effects).
*/
int
canon_enable_capture (Camera *camera, int onoff, GPContext *context) {
CameraWidget *widget = NULL, *child = NULL;
CameraWidgetType type;
int ret;
ret = gp_camera_get_single_config (camera, "capture", &widget, context);
if (ret < GP_OK) {
fprintf (stderr, "camera_get_config failed: %d\n", ret);
return ret;
}
ret = gp_widget_get_type (child, &type);
if (ret < GP_OK) {
fprintf (stderr, "widget get type failed: %d\n", ret);
goto out;
}
switch (type) {
case GP_WIDGET_TOGGLE:
break;
default:
fprintf (stderr, "widget has bad type %d\n", type);
ret = GP_ERROR_BAD_PARAMETERS;
goto out;
}
/* Now set the toggle to the wanted value */
ret = gp_widget_set_value (child, &onoff);
if (ret < GP_OK) {
fprintf (stderr, "toggling Canon capture to %d failed with %d\n", onoff, ret);
goto out;
}
/* OK */
ret = gp_camera_set_single_config (camera, "capture", widget, context);
if (ret < GP_OK) {
fprintf (stderr, "camera_set_config failed: %d\n", ret);
return ret;
}
out:
gp_widget_free (widget);
return ret;
}
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