[lttv.git] / ltt / branches / poly / lttv / modules / guiControlFlow / Draw_Item.c

/******************************************************************************
 * Draw_Item.c
 *
 * This file contains methods responsible for drawing a generic type of data
 * in a drawable. Doing this generically will permit user defined drawing
 * behavior in a later time.
 *
 * We keep each data type in a hash table, as this container suits the
 * best the information we receive (GQuark).
 * (A hash table for facilities, pointing to an array per facility, containing
 * event_number events.)
 * (hash tables for cpus, for process state, for execution mode and submode).
 * The goal is then to provide a generic way to print information on the
 * screen for all this different information.
 *
 * Information can be printed as
 *
 * - text (text + color + size + position (over or under line)
 * - icon (icon filename, corresponding to a loaded icon, accessible through
 *   a GQuark. Icons are loaded statically at the guiControlFlow level during
 *   module initialization and can be added on the fly if not present in the
 *   GQuark.) The habitual place for xpm icons is in
 *   ${prefix}/share/LinuxTraceToolkit.) + position (over or under line)
 * - line (color, width, style)
 * - point (color, size)
 * - background color (color)
 *
 * Each item has an array of hooks (hook list). Each hook represents an
 * operation to perform. We seek the array each time we want to
 * draw an item. We execute each operation in order.
 *
 * The array has to be sorted by priority each time we add a task in it.
 * A priority is associated with each hook. It permits
 * to perform background color selection before line or text drawing. We also
 * draw lines before text, so the text appears over the lines.
 *
 * Executing all the arrays of operations for a specific event (which
 * implies information for state, event, cpu, execution mode and submode)
 * has to be done in a same DrawContext. The goal there is to keep the offset
 * of the text and icons over and under the middle line, so a specific
 * event could be printed as (  R Si 0 for running, scheduled in, cpu 0  ),
 * text being easy to replace with icons. The DrawContext is passed as
 * call_data for the operation hooks.
 *
 * Author : Mathieu Desnoyers, October 2003
 */

#include <glib.h>
#include <lttv/hook.h>
Commit	Line	Data
cf6cb7e0	1	/******************************************************************************
	2	* Draw_Item.c
	3	*
	4	* This file contains methods responsible for drawing a generic type of data
	5	* in a drawable. Doing this generically will permit user defined drawing
	6	* behavior in a later time.
	7	*
	8	* We keep each data type in a hash table, as this container suits the
	9	* best the information we receive (GQuark).
	10	* (A hash table for facilities, pointing to an array per facility, containing
	11	* event_number events.)
	12	* (hash tables for cpus, for process state, for execution mode and submode).
	13	* The goal is then to provide a generic way to print information on the
	14	* screen for all this different information.
	15	*
	16	* Information can be printed as
	17	*
	18	* - text (text + color + size + position (over or under line)
	19	* - icon (icon filename, corresponding to a loaded icon, accessible through
	20	* a GQuark. Icons are loaded statically at the guiControlFlow level during
	21	* module initialization and can be added on the fly if not present in the
	22	* GQuark.) The habitual place for xpm icons is in
	23	* ${prefix}/share/LinuxTraceToolkit.) + position (over or under line)
	24	* - line (color, width, style)
	25	* - point (color, size)
	26	* - background color (color)
	27	*
7d5ffafa	28	* Each item has an array of hooks (hook list). Each hook represents an
	29	* operation to perform. We seek the array each time we want to
	30	* draw an item. We execute each operation in order.
cf6cb7e0	31	*
cf6cb7e0	32	* The array has to be sorted by priority each time we add a task in it.
7d5ffafa	33	* A priority is associated with each hook. It permits
cf6cb7e0	34	* to perform background color selection before line or text drawing. We also
	35	* draw lines before text, so the text appears over the lines.
	36	*
	37	* Executing all the arrays of operations for a specific event (which
	38	* implies information for state, event, cpu, execution mode and submode)
	39	* has to be done in a same DrawContext. The goal there is to keep the offset
	40	* of the text and icons over and under the middle line, so a specific
	41	* event could be printed as ( R Si 0 for running, scheduled in, cpu 0 ),
7d5ffafa	42	* text being easy to replace with icons. The DrawContext is passed as
7d5ffafa	43	* call_data for the operation hooks.
cf6cb7e0	44	*
	45	* Author : Mathieu Desnoyers, October 2003
	46	*/
7d5ffafa	47
	48	#include <glib.h>
	49	#include <lttv/hook.h>
	50
	51