Changelog for GKrellM Plugins

Changes for versions 2.3.1 - 2.3.5

Changes for version 2.3.0

	gint        gkrellm_plugin_export_label(GkrellmMonitor *mon_plugin,
	                    gchar *mon_name,
	                    gchar key, gchar *(*func)(gchar key, gchar *which));
	void        gkrellm_plugin_cancel_label(GkrellmMonitor *mon_plugin, gint id);

	gchar       *gkrellm_plugin_get_exported_label(GkrellmMonitor *mon,
	                    gchar key, gchar *which);

For gkrellmd server plugins:

    GkrellmdTicks *gkrellmd_ticks(void);
    gint          gkrellmd_get_timer_ticks(void);

Changes for version 2.2.7 - 2.2.10

Changes for version 2.2.5

• gkrellmd plugins can read config from a gkrellmd.conf file. Plugin specific config must appear like so:

  	[monitor-name]
  	config line 0
  	config line 1
  	...
  	[/monitor-name]
  

  gkrellmd plugins can read the config lines with:

  	const gchar  *gkrellmd_config_getline(GkrellmdMonitor *mon);
  

• gkrellmd plugins can read data sent from their gkrellm client plugins (demo5 is updated to demonstrate this) using the functions:

  	gboolean  gkrellm_client_send_to_server(gchar *key_name, gchar *line);
  	void    gkrellmd_client_input_connect(GkrellmdMonitor *mon,
  	             void (*func)(GkrellmdClient *, gchar *));
  

• Various other new functions (mostly to round out using text markup):

  	GkrellmDecal  *gkrellm_create_decal_text_markup(GkrellmPanel *p, gchar *string,
  	                    GkrellmTextstyle *ts, GkrellmStyle *style,
  	                    gint x, gint y, gint w);
  	void  gkrellm_decal_text_markup_insert(GkrellmDecal *d, gchar *s,
  	                    GkrellmTextstyle *ts, gint x_off, gint y_off);
  	void  gkrellm_decal_text_nth_inserted_set_offset(GkrellmDecal *d,
  	                    gint n, gint x_off, gint y_off);
  	void  gkrellm_decal_text_nth_inserted_get_offset(GkrellmDecal *d,
  	                    gint n, gint *x_off, gint *y_off);
  	void  gkrellm_config_instant_apply(GkrellmMonitor *mon);
  	GtkTreeSelection *gkrellm_gtk_scrolled_selection(GtkTreeView *treeview,
  	                    GtkWidget *box, GtkSelectionMode s_mode,
  	                    GtkPolicyType h_policy, GtkPolicyType v_policy,
  	                    void (*func_cb)(), gpointer data);
  	void  gkrellm_text_markup_extents(PangoFontDescription *font_desc,
  	                    gchar *text, gint len, gint *width, gint *height,
  	                    gint *baseline, gint *y_ink);
  	gint  gkrellm_gdk_string_markup_width(PangoFontDescription *, gchar *);
  	gint  gkrellm_gdk_text_markup_width(PangoFontDescription *font_desc,
  	                    const gchar *string, gint len);
  	void  gkrellm_gdk_draw_string_markup(GdkDrawable *drawable,
  	                    PangoFontDescription *font,
  	                    GdkGC *gc, gint x, gint y, gchar *string);
  	void  gkrellm_gdk_draw_text_markup(GdkDrawable *drawable,
  	                    PangoFontDescription *font,
  	                    GdkGC *gc, gint x, gint y, gchar *string, gint len);
  

Changes for versions 2.2.3 - 2.2.4

none

Changes for version 2.2.2

New function to get theme position settings for panel labels.

	void   gkrellm_panel_label_get_position(GkrellmStyle *style,
                      gint *x_position, gint *y_off);

Changes for version 2.2.1

New functions for drawing text decals using Pango markup:

	void    gkrellm_draw_decal_markup(GkrellmPanel *p, GkrellmDecal *d, gchar *text);
	void    gkrellm_decal_scroll_text_set_markup(GkrellmPanel *p,
                        GkrellmDecal *d, gchar *text);

The gkrellm_decal_scroll_text_set_text() function introduced in 2.2.0 no longer uses markup.

Changes for version 2.2.0

• Gkrellm text drawing is converted from GdkFont to Pango. The main issue here is that plugins should not be using GdkFont functions such as gdk_string_width() and should use the gkrellm_gdk functions listed below. With maybe only one or two exceptions, existing plugins should compile (with some possible warnings) and run fine since gkrellm now intercepts some straight GdkFont functions. Without this interception, many plugins would crash gkrellm. A plugin using gdk_string_width() can compile under all gkrellm versions by substituting in gkrellm_gdk_string_width() and having this define:

  	#if !GKRELLM_CHECK_VERSION(2,2,0)
  	#define gkrellm_gdk_string_width    gdk_string_width
  	#endif
  	

• There can now be gkrellmd server plugins. See the tutorial demo5 plugin on the plugins page at gkrellm.net.
• Updated the plugins reference with the new functions. Updated demo3 to use new scrolling text functions.
• gkrellm_draw_decal_text() now ignores the "value" arg and internally checks for changed text before doing a redraw.
• gkrellm_create_decal_text_with_height() behavior is changed because GdkFont baseline has a different definition from Pango baseline. So the last arg to the function now has a different meaning. See the plugin programmers reference.

General new functions:

	void    gkrellm_decal_get_size(GkrellmDecal *d, gint *w, gint *h);
	void    gkrellm_decal_text_set_offset(GkrellmDecal *d, gint x, gint y);
	void    gkrellm_decal_text_get_offset(GkrellmDecal *d, gint *x, gint *y);
	void    gkrellm_chart_reuse_text_format(GkrellmChart *cp);
	gchar   *gkrellm_get_hostname(void);

New functions to minimize Pango drawing when scrolling text:

	void    gkrellm_decal_scroll_text_set_text(GkrellmPanel *p,
	                    GkrellmDecal *d, gchar *text);
	void    gkrellm_decal_scroll_text_get_size(GkrellmDecal *d,
	                    gint *w, gint *h);
	void    gkrellm_decal_scroll_text_align_center(GkrellmDecal *d,
	                    gboolean center);
	void    gkrellm_decal_scroll_text_horizontal_loop(GkrellmDecal *d,
	                    gboolean loop);
	void    gkrellm_decal_scroll_text_vertical_loop(GkrellmDecal *d,
	                    gboolean loop);

Some convenience functions for transitioning from GdkFont to PangoFontDescription:

	void    gkrellm_text_extents(PangoFontDescription *font_desc, gchar *text,
	                    gint len, gint *width, gint *height, gint *baseline,
	                    gint *y_ink);

	gint    gkrellm_gdk_string_width(PangoFontDescription *, gchar *);
	void    gkrellm_gdk_draw_string(GdkDrawable *drawable,
	                    PangoFontDescription *font,
	                    GdkGC *gc, gint x, gint y, gchar *string);
	void    gkrellm_gdk_draw_text(GdkDrawable *drawable,
	                    PangoFontDescription *font,
	                    GdkGC *gc, gint x, gint y, gchar *string, gint len);

New functions to implement client/server capable plugins:

    /* -------- gkrellm client plugin functions ----------- */
	gboolean  gkrellm_client_mode(void);
	void    gkrellm_client_plugin_get_setup(gchar *key_name,
	                    void (*setup_func_cb)(gchar *str));
	void    gkrellm_client_plugin_serve_data_connect(GkrellmMonitor *mon,
	                    gchar *key_name, void (*func_cb)(gchar *line));
	void    gkrellm_client_plugin_reconnect_connect(gchar *key_name,
	                    void (*func_cb)());

    /* -------- gkrellmd server plugin functions ----------- */
	void    gkrellmd_plugin_serve_setup(GkrellmdMonitor *mon,
	                    gchar *name, gchar *line);
	void    gkrellmd_need_serve(GkrellmdMonitor *mon);
	void    gkrellmd_set_serve_name(GkrellmdMonitor *mon, const gchar *name);
	void    gkrellmd_serve_data(GkrellmdMonitor *mon, gchar *line);
	void    gkrellmd_add_serveflag_done(gboolean *);

    /* -------- Small set of useful gkrellmd plugin functions -- */
	void    gkrellmd_free_glist_and_data(GList **list_head);
	gchar   *gkrellmd_dup_token(gchar **string, gchar *delimeters);
	gboolean gkrellmd_dup_string(gchar **dst, gchar *src);

Changes for version 2.1.23 - 2.1.28

none

Changes for version 2.1.22

Fix omission of check_func in alert plugin interface. Replace gkrellm_alert_plugin_connect() with:

    void    gkrellm_alert_plugin_alert_connect(GkrellmAlertPlugin *gap,
                 void (*alarm_func)(), void (*warn_func)(),
                 void (*update_func)(), void (*check_func)(),
                 void (*destroy_func)());

(changes the API, but no plugins are using this yet).

Changes for version 2.1.17 - 2.1.21

none

Changes for version 2.1.16

Added a plugin API for alerts:

	void        gkrellm_alert_get_alert_state(GkrellmAlert *alert,
	                    gboolean *alarm_state, gboolean *warn_state);
	GkrellmAlertPlugin *gkrellm_alert_plugin_add(GkrellmMonitor *mon,
	                    gchar *name);
	void        gkrellm_alert_plugin_connect(GkrellmAlertPlugin *gap,
	                    void (*alarm_func)(), void (*warn_func)(),
	                    void (*update_func)(), void (*destroy_func)());
	void        gkrellm_alert_plugin_config_connect(GkrellmAlertPlugin *gap,
	                    gchar *tab_name,
	                    void (*config_create_func)(), void (*config_done_func),
	                    void (*config_save_func)(),void (*config_load_func)());
	gchar       *gkrellm_alert_plugin_config_get_id_string(GkrellmAlert *alert);
	void        gkrellm_alert_plugin_alert_attach(GkrellmAlertPlugin *gap,
	                    GkrellmAlert *alert, gpointer data);
	void        gkrellm_alert_plugin_alert_detach(GkrellmAlertPlugin *gap,
	                    GkrellmAlert *alert);
	gpointer    gkrellm_alert_plugin_get_data(GkrellmAlertPlugin *gap,
	                    GkrellmAlert *alert);
	void        gkrellm_alert_plugin_command_process(GkrellmAlert *alert,
	                    gchar *src, gchar *dst, gint dst_size);

Other new functions:

	GtkWidget   *gkrellm_gtk_category_vbox(GtkWidget *box, gchar *category_header,
	                    gint header_pad, gint box_pad, gboolean pack_start);
	void         gkrellm_remove_launcher(GkrellmLauncher *launch);

Changes for version 2.1.13 - 2.1.15

none

Changes for version 2.1.12

As mentioned in the main Changelog, make install will install a gkrellm.pc file so plugin makefiles may use:

	`pkg-config gkrellm --cflags`
	`pkg-config gkrellm --libs`

New functions:

	void        gkrellm_decal_text_clear(GkrellmDecal *d);
	void        gkrellm_decal_text_insert(GkrellmDecal *d, gchar *s,
	                    GkrellmTextstyle *ts, gint x_off, gint y_off);
	GkrellmDecal *gkrellm_create_decal_text_with_height(GkrellmPanel *p,
	                    GkrellmTextstyle *ts, GkrellmStyle *style,
	                    gint x, gint y, gint w, gint h, gint y_baseline);
	void         gkrellm_chartconfig_callback_block(GkrellmChartconfig *, gboolean);

Changes for version 2.1.10

None

Changes for version 2.1.9

New functions:

	GkrellmPiximage *gkrellm_piximage_new_from_inline(const guint8 *data, gboolean copy_pixels);
	gboolean	gkrellm_load_piximage_from_inline(gchar *name, const guint8 *data,
						GkrellmPiximage **image,
						gchar *subdir, gboolean copy_pixels);
	void		gkrellm_alert_commands_config(GkrellmAlert *alert,
						gboolean alarm, gboolean warn);
	void		gkrellm_reset_alert_soft(GkrellmAlert *alert);

See the GKrellM2 plugin programmers reference for descriptions.

Changes for version 2.1.8

New functions:

	void		gkrellm_panel_label_on_top_of_decals(GkrellmPanel *p,
						gboolean mode);
	gboolean	gkrellm_alert_is_activated(GkrellmAlert *alert);
	void		gkrellm_alert_dup(GkrellmAlert **ap, GkrellmAlert *a_src);
	void		gkrellm_alert_config_create_connect(GkrellmAlert *alert,
						void (*func)(), gpointer data);
	void		gkrellm_alert_command_process_connect(GkrellmAlert *alert,
						void (*func)(), gpointer data);
	gboolean	gkrellm_alert_decal_visible(GkrellmAlert *alert);
	void		gkrellm_alert_set_delay(GkrellmAlert *alert, gint delay);
	void		gkrellm_alert_delay_config(GkrellmAlert *alert, gint step,
						gint high, gint low);
	void		gkrellm_gtk_alert_button(GtkWidget *box, GtkWidget **button,
						gboolean expand, gboolean fill, gint pad,
						gboolean pack_start, void (*cb_func)(), gpointer data);

The GKrellM2 plugin programmers reference is updated with these functions and now includes a link to a tutorial demo-alert.c.

Changes for version 2.1.2 - 2.1.7

None

Changes for version 2.1.1

Users can set a theme scale. Buttons made with gkrellm_make_scaled_button() and krells are automatically theme scaled, but plugins that have their own multi frame decal images will need a code change if they want the decal image to be user scalable. This fragment shows a clean way to do it:

	gkrellm_load_piximae("foo", foo_xpm, &foo_piximage, FOO_STYLE_NAME);
#if defined(GKRELLM_HAVE_THEME_SCALE)
	/* New function scales to multiple of frame height and does not require
	|  the plugin to maintain a pixmap and mask.
	*/
	foo_decal = gkrellm_make_scaled_decal_pixmap(panel, foo_piximage, style,
	              N_FOO_FRAMES, -1, -1, 0, 0);
#else
	gkrellm_scale_piximage_to_pixmap(foo_piximage, &foo_pixmap,
	              &foo_mask, 0, 0);
	foo_decal = gkrellm_create_decal_pixmap(p, foo_pixmap, foo_mask,
	              N_FOO_FRAMES, style, -1, -1);
#endif

However, if the plugin needs to maintain the pixmap and mask, you can handle things yourself by scaling the decal frame height by the theme_scale value and then creating the pixmap height to be a multiple of the frame height:

#if defined(GKRELLM_HAVE_THEME_SCALE)
	h = gdk_pixbuf_get_height(foo_piximage->pixbuf) / N_FOO_FRAMES;
	h *= gkrellm_get_theme_scale();     /* New function */
	h *= N_FOO_FRAMES;
	w = -1;			/* Scales to drawn image size * theme_scale */
#else
	h = 0;             /* Will scale to drawn image size */
	w = 0;
#endif
	gkrellm_scale_piximage_to_pixmap(foo_piximage, &foo_pixmap,
	              &foo_mask, w, h);
	foo_decal = gkrellm_create_decal_pixmap(panel, foo_pixmap, foo_mask,
	              N_FOO_FRAMES, style, -1, -1);

Code that places decals relative to margins or to other decal/krell positions and sizes should be fine, but if you place at hardwired locations, the x,y location values might need to be scaled by gkrellm_get_theme_scale() for things to look right when the user changes the theme scale.

Changes for version 2.1.0

There is an issue with the new theming features in 2.1.0. There are only two defined monitor types (chart and meter), but some monitors are hybrids. The new spacer and cap theme images are applied based on monitor type, but for hybrid monitors there is no way for gkrellm to determine which images should really be used. So there is a new function:

gkrellm_spacers_set_types(GkrellmMonitor *mon, gint top, gint bottom);

where top and bottom are GKRELLM_SPACER_CHART or GKRELLM_SPACER_METER. Hybrid monitors can now make this call to let gkrellm know what it is doing. See the builtin mem.c and my plugin gkrellmss (version 2.1) for examples of its usage.

Changes for version 2.0.4

None.

Changes for version 2.0.3

• If a plugin implements instant apply (so no apply_config() and it is NULL in the GkrellmMonitor struct), then if the plugins config page is selected, there will be no "Apply" button shown since it, ...ummm... doesn't apply.
• For plugins which have an apply_config(), now there is an implied apply if the user leaves the plugins config page by selecting another monitor.

Changes for version 2.0.1 - 2.0.2

None.

Changes for version 2.0.0

See the gkrellm-2.0 porting guide.

Changes for version 1.2.10 - 1.2.11

None.

Changes for version 1.2.9

Some added functions (see the Plugin Programmers Reference for more functions):

Style   *gkrellm_meter_style_by_name(gchar *name);
Style   *gkrellm_panel_style_by_name(gchar *name);
Style   *gkrellm_chart_style_by_name(gchar *name);
	

which provide for using a custom style with values set with StyleMeter or StylePanel lines in the gkrellmrc. If you have extra krells you want to allow to be themed, this can clean up your code by eliminating a bunch of gkrellm_get_gkrellmrc_integer() or gkrellm_get_gkrellmrc_string() calls. See the Themes file and gkrellmss.c in GKrellMSS 0.4 (when I release it) for a working example of this.

Style margin changes for more layout control. Usually these will be set by a theme author in the gkrellmrc:

• There is now a left and right panel margin instead of the single "margin". These are in a new Margin struct which also includes the top and bottom margin. Use gkrellm_get_style_margins() to access the themed margin values.
• The Style struct has new krell_left_margin and krell_right_margin for setting krell margins independently of panel margins.

Changes for version 1.2.6 - 1.2.8

None.

Changes for version 1.2.5

Added some functions.

void    gkrellm_set_krell_expand(Style *, gchar *);
void    gkrellm_insert_krell_nth(Panel *, Krell *, gint);
void    gkrellm_insert_decal_nth(Panel *, Decal *, gint);
gboolean gkrellm_in_decal(Decal *, GdkEventButton *);
void    gkrellm_decal_button_connect(DecalButton *, void (*func)(), void *);
void    gkrellm_decal_button_right_connect(DecalButton *, void (*func)(), void *);
void    gkrellm_set_button_sensitive(DecalButton *, gboolean);
void    gkrellm_hide_button(DecalButton *);
void    gkrellm_show_button(DecalButton *);
	

The DecalButton callback function prototype adds a "gpointer data" so you don't have to reference button->data.

Changes for version 1.2.3 - 1.2.4

None.

Changes for version 1.2.2

Added some functions. Some of them are (for controlling decals and krells):

void          gkrellm_set_krell_margins(Panel *, Krell *k, gint, gint);
void          gkrellm_move_krell_yoff(Panel *, Krell *, gint);
void          gkrellm_draw_decal_on_chart(Chart *, Decal *, gint, gint);
void          gkrellm_move_decal(Panel *, Decal *, gint, gint);
void          gkrellm_decal_on_top_layer(Decal *, gboolean);
	

Changes for version 1.2.1

None.

Changes for version 1.2.0

Any plugin using charts will require coding changes and a recompile. Charts are now automatically user configurable with a right click on a chart. There are too many new functions to cover here, so look over the updated plugin programmers reference and especially the chart demo1.c program. All of the "chartconfig" and "chartdata" functions are new. The create and destroy functions are changed to gkrellm_chart_create() and gkrellm_chart_destroy(). You should no longer do awkward settings such as chart->previous = blah (use gkrellm_monotonic_chartdata()) or chart->scale_max = 0 (chart scaling is now handled properly) A couple of key points to note are:
• Charts no longer automatically have two data sets. There is a new ChartData struct which is added to Charts as needed. To handle a variable number of data layers, the store data routine is changed to a varargs
          gkrellm_store_chartdata(Chart *, gulong total, ...);
• There are several chart config options all handled automatically. But you do need to save and load the config - see demo1.c
Plugins that use panels do not require a recompile, but I've made the chart and panel coding styles cleaner and more consistent by adding some functions you should migrate to. When you do, your plugin will depend on GKrellM version >= 1.2.0. These are for coding cleanups and some new functions:
• If you have a spare right click, you can have it call
          gkrellm_open_config_window(Monitor *);
  and the config window will be opened right to your plugin's config page.
• Use gkrellm_panel_create() instead of gkrellm_create_panel(). Use gkrellm_panel_configure() instead of gkrellm_configure_panel(). Use gkrellm_panel_enable_visibility() instead of gkrellm_enable_visibility() (or you could use gkrellm_hide_panel() and gkrellm_show_panel()). See the plugin programmers reference for usage.
• After you upgrade to using these new functions, there should be no need to worry about managing stuff that gkrellm should be handling. ie, you should never have to make any gkrellm_monitor_height_adjust() or gkrellm_pack_side_frame() calls. Also, decal/krell lists will be automatically destroyed prior to create plugin calls (but you can override this) and you should no longer set krell->previous (use gkrellm_monotonic_krell_values()). Also if you destroy a panel, you will no longer need to destroy lists, adjust monitor height, or g_free() the Panel struct storage.

  Look at the revised demos in the programmers reference. Also look at the bottom of gkrellm_public_proto.h for the list of functions that should be replaced.

Changes for version 1.0.8

None

Changes for version 1.0.7

None

Changes for version 1.0.6

/usr/lib/gkrellm/plugins and /usr/local/lib/gkrellm/plugins are now also searched to comply with the FHS.

Changes for version 1.0.5

None

Changes for version 1.0.4

Looking ahead a bit (some months?) when I get to 1.1.0 I want the gkrellm namespace to be cleaned up. I'm defining that to mean that if you do a "nm -u plugin.so" the undefined symbols expected to link to gkrellm will be only GK and gkrellm_XXX symbols. Starting with 1.0.4 gkrellm_private_proto.h is no longer included by gkrellm.h and it is not installed in the include directory. I have temporarily moved some symbols affecting a few plugins from private to public proto.h. I hope I moved enough so that all current plugins I know of will still compile. The plan is when 1.1.0 arrives I will do the "Cut Here" at the bottom of gkrellm_public_proto.h, so source will need to be in sync by then.
To check if you need changes, #ifdef out the part that will be cut and see if you get warnings compiling with -Wall.
If you have changes to make or want to use any new functions below, make your source dependent on version 1.0.4 as described in the changes for version 1.0.3.

Added some handy utility routines (most were already in gkrellm_private_proto.h without a gkrellm_ prefix):

	GtkWidget *gkrellm_create_tab(GtkWidget *, gchar *);
	gchar   *gkrellm_entry_get_text(GtkWidget **);
	void    gkrellm_spin_button(GtkWidget *, GtkWidget **, gfloat, gfloat, gfloat,
	                gfloat, gfloat, gint, gint, void (*func)(), gpointer, gboolean, gchar *);
	void    gkrellm_check_button(GtkWidget *, GtkWidget **, gboolean, gboolean, gint, gchar *);
	gchar   *gkrellm_homedir(void);
	gboolean gkrellm_dup_string(gchar **, gchar *);
	gchar   *gkrellm_make_config_file_name(gchar *, gchar *);
	struct tm *gkrellm_get_current_time();
	

Other uninteresting changes are: Added some session manager plugin helper functions so I could write the gkrellm-gnome plugin and exported sensor reading functions for special purpose sensor monitoring plugins.

Changes for version 1.0.3

• You can run gkrellm -p plugin-under-test.so to load the plugin you are working on in the current directory. Should be a development time saver.
• I am changing the way top and bottom margins are specified in panels. Previously labels and decals were margined by using the top and bottom borders of the background image. Now there are new top_margin and bottom_margin values in the Style struct to go with the existing margin value (which is used for both left and right margins). Most plugins probably don't care about this since the gkrellm create and configure routines handle most placements, but if you were using any border.top or border.bottom references for positioning, you should use the new routine:

  
      void  gkrellm_get_top_bottom_margins(Style *s, gint *top, gint *bot)
  	

  This routine determines if a theme is using the new top_margin and bottom_margin values and returns them, otherwise it will return the old top and bottom border values so existing themes will not break.
• Two new Style copying functions needed to fix a bad programming practice I had promoted in my demo programs:

  
      Style     *gkrellm_copy_style(Style *src_style);
      TextStyle *gkrellm_copy_textstyle(TextStyle *src_style);
  	

  Previously I had suggested copying a style to a plugin local style like so:

  
      Style *my_style, *style;
  
      style     = gkrellm_meter_style(DEFAULT_STYLE);
      my_style  = gkrellm_style_new0();
      *my_style = *style;
  	

  But I goofed and this is no good. If you have such code please change it. It should now be done like so:

  
      Style *my_style, *style;
  
      style    = gkrellm_meter_style(style_id);
      my_style = gkrellm_copy_style(style);
  	

  NOTE: Just to emphasize a point, you should never have a static local Style or TextStyle declared. You should use the above copy function so the style can be initialized with a themes gkrellmrc settings.
• If you do use the above new routines and don't want to clutter your code with #ifdefs to make it compatible with old GKrellM versions, I suggest making your plugin require version 1.0.3. After all, I don't think it's unreasonable to ask someone installing your latest plugin version to also have installed a recent GKrellM version. It's what I would do and it can keep your code base clean. You can enforce this requirement in your header file after you include gkrellm.h:

  
      #include <gkrellm/gkrellm.h>
      #if  !defined(GKRELLM_VERSION_MAJOR) \
           || (GKRELLM_VERSION_MAJOR==1 && GKRELLM_VERSION_MINOR==0 && GKRELLM_VERSION_REV<3)
      #error This plugin requires GKrellM version >= 1.0.3
      #endif
  	

  Notice that in 1.0.3 you can now use GKRELLM_VERSION_MAJOR instead of just VERSION_MAJOR. Similarly, if you want to clean out ugly #ifdef'ed code sections for previous versions of your plugin, just do it! But if you want to conditional on a GKrellM version prior to 1.0.3, you can't use the GKRELLM_VERSION_MAJOR. Ie. if you #ifdef'ed in some of the new functions for 0.10.0, clean them out and put in your header:

  
      #include <gkrellm/gkrellm.h>
      #if   (VERSION_MAJOR==0) && (VERSION_MINOR<10)
      #error This plugin requires GKrellM version >= 0.10.0
      #endif
  	

  But, if you are going to do this, why not just make a clean break? Go ahead and use the first example using GKRELLM_VERSION_XXX defines, and be done with it!

Changes for version 1.0.0 - 1.0.2

None.

Changes for version 0.10.5

Added these routines:
• gkrellm_config_modified()
• gkrellm_chart_images_override()
• gkrellm_get_gkrellmrc_integer()
• gkrellm_get_gkrellmrc_string()
See the Plugins programmers reference for descriptions.

Changes for version 0.10.2 - 0.10.4

None.

Changes for version 0.10.1

• There has been a loose end with controlling plugin placement when multiple plugins are placing themselves before the same monitor. So far this placement has been determined by the order plugins are read from the plugin directories and this in turn is a function of the order they were written into the directory. There is no alphabetical sorting at all. So to give some control, plugins can now specify a gravity value from 0 to 15 in the placement parameter. Think of it as higher gravity pulling a plugin down in its placement slot. If you see no reason your plugin should care about this level of control then do nothing, no code changes are required. But if there is some reason you prefer your plugin be biased downwards, then give it gravity like so:

  #ifdef GRAVITY
  #define MY_PLACEMENT (MON_APM | GRAVITY(8))
  #else
  #define MY_PLACEMENT (MON_APM)
  #endi