[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.
 *
 * This file provides an API which is meant to be reusable for all viewers that
 * need to show information in line, icon, text, background or point form in
 * a drawable area having time for x axis. The y axis, in the control flow
 * viewer case, is corresponding to the different processes, but it can be
 * reused integrally for cpu, and eventually locks, buffers, network
 * interfaces... What will differ between the viewers is the precise
 * information which interests us. We may think that the most useful
 * information for control flow are some specific events, like schedule
 * change, and processes'states. It may differ for a cpu viewer : the
 * interesting information could be more the execution mode of each cpu.
 * This API in meant to make viewer's writers life easier : it will become
 * a simple choice of icons and line types for the precise information
 * the viewer has to provide (agremented with keeping supplementary records
 * and modifying slightly the DrawContext to suit the needs.)
 *
 * We keep each data type in attributes, keys to specific information
 * being formed from the GQuark corresponding to the information received.
 * (facilities / facility_name / events / eventname.)
 * (cpus/cpu_name, process_states/ps_name,
 * execution_modes/em_name, execution_submodes/es_name).
 * 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)
 * - Arc (big points) (color, size)
 * - background color (color)
 *
 * An item is a leaf of the attributes tree. It is, in that case, including
 * all kind of events categories we can have. It then associates each category
 * with one or more actions (drawing something) or nothing.
 * 
 * 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. An operation type
 * is associated with each hook to permit user listing and modification
 * of these operations. The operation type is also used to find the
 * corresponding priority for the sorting. Operation type and priorities
 * are enum and a static int table.
 *
 * The array has to be sorted by priority each time we add a task in it.
 * A priority is associated with each operation type. 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.
 *
 * We use the lttv global attributes to keep track of the loaded icons.
 * If we need an icon, we look for it in the icons / icon name pathname.
 * If found, we use the pointer to it. If not, we load the pixmap in
 * memory and set the pointer to the GdkPixmap in the attributes. The
 * structure pointed to contains the pixmap and the mask bitmap.
 * 
 * Author : Mathieu Desnoyers, October 2003
 */

#include <glib.h>
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <lttv/hook.h>
#include <lttv/attribute.h>
#include <lttv/iattribute.h>
#include <string.h>

#include <lttv/processTrace.h>
#include <lttv/state.h>

#include "Draw_Item.h"


#define MAX_PATH_LEN 256

/* The DrawContext keeps information about the current drawing position and
 * the previous one, so we can use both to draw lines.
 *
 * over : position for drawing over the middle line.
 * middle : middle line position.
 * under : position for drawing under the middle line.
 *
 * the modify_* are used to take into account that we should go forward
 * when we draw a text, an arc or an icon, while it's unneeded when we
 * draw a line or background.
 *
 */
struct _DrawContext {
	GdkDrawable	*drawable;
	GdkGC		*gc;
	

	DrawInfo	*Current;
	DrawInfo	*Previous;
};

struct _DrawInfo {
	ItemInfo	*over;
	ItemInfo	*middle;
	ItemInfo	*under;
	
	ItemInfo	*modify_over;
	ItemInfo	*modify_middle;
	ItemInfo	*modify_under;
};

/* LttvExecutionState is accessible through the LttvTracefileState. Is has
 * a pointer to the LttvProcessState which points to the top of stack
 * execution state : LttvExecutionState *state.
 *
 * LttvExecutionState contains (useful here):
 * LttvExecutionMode t,
 * LttvExecutionSubmode n,
 * LttvProcessStatus s
 * 
 *
 * LttvTraceState will be used in the case we need the string of the
 * different processes, eventtype_names, syscall_names, trap_names, irq_names.
 *
 * LttvTracefileState also gives the cpu_name and, as it herits from
 * LttvTracefileContext, it gives the LttEvent structure, which is needed
 * to get facility name and event name.
 */
struct _ItemInfo {
	gint	x, y;
	LttvTraceState		*ts;
	LttvTracefileState	*tfs;
};

/*
 * Structure used to keep information about icons.
 */
struct _IconStruct {
	GdkPixmap *pixmap;
	GdkBitmap *mask;
};


/*
 * The Item element is only used so the DrawOperation is modifiable by users.
 * During drawing, only the Hook is needed.
 */
struct _DrawOperation {
	DrawableItems	Item;
	LttvHooks	*Hook;
};

/*
 * We define here each items that can be drawn, together with their
 * associated priority. Many item types can have the same priority,
 * it's only used for quicksorting the operations when we add a new one
 * to the array of operations to perform. Lower priorities are executed
 * first. So, for example, we may want to give background color a value
 * of 10 while a line would have 20, so the background color, which
 * is in fact a rectangle, does not hide the line.
 */

static int Items_Priorities[] = {
	50,	/* ITEM_TEXT */
	40,	/* ITEM_ICON */
	20,	/* ITEM_LINE */
	30,	/* ITEM_POINT */
	10	/* ITEM_BACKGROUND */
};

/*
 * Here are the different structures describing each item type that can be
 * drawn. They contain the information necessary to draw the item : not the
 * position (this is provided by the DrawContext), but the text, icon name,
 * line width, color; all the properties of the specific items.
 */

struct _PropertiesText {
	GdkColor	*foreground;
	GdkColor	*background;
	gint		size;
	gchar		*Text;
	RelPos		position;
};


struct _PropertiesIcon {
	gchar		*icon_name;
	gint		width;
	gint		height;
	RelPos		position;
};

struct _PropertiesLine {
	GdkColor	*color;
	gint		line_width;
	GdkLineStyle	style;
	RelPos		position;
};

struct _PropertiesArc {
	GdkColor	*color;
	gint		size;	/* We force circle by width = height */
	gboolean	filled;
	RelPos		position;
};

struct _PropertiesBG {
	GdkColor	*color;
};


/* Drawing hook functions */
gboolean draw_text( void *hook_data, void *call_data)
{
	PropertiesText *Properties = (PropertiesText*)hook_data;
	DrawContext *Draw_Context = (DrawContext*)call_data;

	PangoContext *context;
	PangoLayout *layout;
	PangoFontDescription *FontDesc;// = pango_font_description_new();
	gint Font_Size;
	PangoRectangle ink_rect;
		
	gdk_gc_set_foreground(Draw_Context->gc, Properties->foreground);
	gdk_gc_set_background(Draw_Context->gc, Properties->background);

	layout = gtk_widget_create_pango_layout(GTK_WIDGET(Draw_Context->drawable), NULL);
	context = pango_layout_get_context(layout);
	FontDesc = pango_context_get_font_description(context);
	Font_Size = pango_font_description_get_size(FontDesc);
	pango_font_description_set_size(FontDesc, Properties->size*PANGO_SCALE);
	
	
	pango_layout_set_text(layout, Properties->Text, -1);
	pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
	switch(Properties->position) {
		case OVER:
							gdk_draw_layout(Draw_Context->drawable, Draw_Context->gc,
								Draw_Context->Current->modify_over->x,
								Draw_Context->Current->modify_over->y,
								layout);
							Draw_Context->Current->modify_over->x += ink_rect.width;

			break;
		case MIDDLE:
							gdk_draw_layout(Draw_Context->drawable, Draw_Context->gc,
								Draw_Context->Current->modify_middle->x,
								Draw_Context->Current->modify_middle->y,
								layout);
							Draw_Context->Current->modify_middle->x += ink_rect.width;
			break;
		case UNDER:
							gdk_draw_layout(Draw_Context->drawable, Draw_Context->gc,
								Draw_Context->Current->modify_under->x,
								Draw_Context->Current->modify_under->y,
								layout);
							Draw_Context->Current->modify_under->x += ink_rect.width;
			break;
	}


	pango_font_description_set_size(FontDesc, Font_Size);
	g_free(layout);
	
	return 0;
}


/* To speed up the process, search in already loaded icons list first. Only
 * load it if not present.
 */
gboolean draw_icon( void *hook_data, void *call_data)
{
	PropertiesIcon *Properties = (PropertiesIcon*)hook_data;
	DrawContext *Draw_Context = (DrawContext*)call_data;

  LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes());
	LttvAttributeValue value;
	gchar icon_name[MAX_PATH_LEN] = "icons/";
	IconStruct *icon_info;
	
	strcat(icon_name, Properties->icon_name);
	
  g_assert(lttv_iattribute_find_by_path(attributes, icon_name,
      LTTV_POINTER, &value));
	if(*(value.v_pointer) == NULL)
	{
  	*(value.v_pointer) = icon_info = g_new(IconStruct,1);
		
		icon_info->pixmap = gdk_pixmap_create_from_xpm(Draw_Context->drawable,
													&icon_info->mask, NULL, Properties->icon_name);
	}
	else
	{
		icon_info = *(value.v_pointer);
	}
	
	gdk_gc_set_clip_mask(Draw_Context->gc, icon_info->mask);
	
	switch(Properties->position) {
		case OVER:
							gdk_gc_set_clip_origin(
									Draw_Context->gc,
									Draw_Context->Current->modify_over->x,
									Draw_Context->Current->modify_over->y);
							gdk_draw_drawable(Draw_Context->drawable, 
									Draw_Context->gc,
									icon_info->pixmap,
									0, 0,
									Draw_Context->Current->modify_over->x,
									Draw_Context->Current->modify_over->y,
									Properties->width, Properties->height);

							Draw_Context->Current->modify_over->x += Properties->width;

			break;
		case MIDDLE:
							gdk_gc_set_clip_origin(
									Draw_Context->gc,
									Draw_Context->Current->modify_middle->x,
									Draw_Context->Current->modify_middle->y);
							gdk_draw_drawable(Draw_Context->drawable, 
									Draw_Context->gc,
									icon_info->pixmap,
									0, 0,
									Draw_Context->Current->modify_middle->x,
									Draw_Context->Current->modify_middle->y,
									Properties->width, Properties->height);

							Draw_Context->Current->modify_middle->x += Properties->width;
			break;
		case UNDER:
							gdk_gc_set_clip_origin(
									Draw_Context->gc,
									Draw_Context->Current->modify_under->x,
									Draw_Context->Current->modify_under->y);
							gdk_draw_drawable(Draw_Context->drawable, 
									Draw_Context->gc,
									icon_info->pixmap,
									0, 0,
									Draw_Context->Current->modify_under->x,
									Draw_Context->Current->modify_under->y,
									Properties->width, Properties->height);

							Draw_Context->Current->modify_under->x += Properties->width;
			break;
	}

	gdk_gc_set_clip_origin(Draw_Context->gc, 0, 0);
	gdk_gc_set_clip_mask(Draw_Context->gc, NULL);
	
	return 0;
}

gboolean draw_line( void *hook_data, void *call_data)
{
	PropertiesLine *Properties = (PropertiesLine*)hook_data;
	DrawContext *Draw_Context = (DrawContext*)call_data;

	gdk_gc_set_foreground(Draw_Context->gc, Properties->color);
	gdk_gc_set_line_attributes(	Draw_Context->gc,
															Properties->line_width,
															Properties->style,
															GDK_CAP_BUTT,
															GDK_JOIN_MITER);

	switch(Properties->position) {
		case OVER:
							drawing_draw_line(
								NULL, Draw_Context->drawable,
								Draw_Context->Previous->over->x,
								Draw_Context->Previous->over->y,
								Draw_Context->Current->over->x,
								Draw_Context->Current->over->y,
								Draw_Context->gc);
			break;
		case MIDDLE:
							drawing_draw_line(
								NULL, Draw_Context->drawable,
								Draw_Context->Previous->middle->x,
								Draw_Context->Previous->middle->y,
								Draw_Context->Current->middle->x,
								Draw_Context->Current->middle->y,
								Draw_Context->gc);
			break;
		case UNDER:
							drawing_draw_line(
								NULL, Draw_Context->drawable,
								Draw_Context->Previous->under->x,
								Draw_Context->Previous->under->y,
								Draw_Context->Current->under->x,
								Draw_Context->Current->under->y,
								Draw_Context->gc);

			break;
	}

	return 0;
}

gboolean draw_arc( void *hook_data, void *call_data)
{
	PropertiesArc *Properties = (PropertiesArc*)hook_data;
	DrawContext *Draw_Context = (DrawContext*)call_data;

	gdk_gc_set_foreground(Draw_Context->gc, Properties->color);

	switch(Properties->position) {
		case OVER:
			gdk_draw_arc(Draw_Context->drawable, Draw_Context->gc,
							Properties->filled,
							Draw_Context->Current->modify_over->x,
							Draw_Context->Current->modify_over->y,
							Properties->size, Properties->size, 0, 360*64);
			Draw_Context->Current->modify_over->x += Properties->size;
		
			break;
		case MIDDLE:
			gdk_draw_arc(Draw_Context->drawable, Draw_Context->gc,
							Properties->filled,
							Draw_Context->Current->modify_middle->x,
							Draw_Context->Current->modify_middle->y,
							Properties->size, Properties->size, 0, 360*64);
			Draw_Context->Current->modify_middle->x += Properties->size;
			
			break;
		case UNDER:
			gdk_draw_arc(Draw_Context->drawable, Draw_Context->gc,
							Properties->filled,
							Draw_Context->Current->modify_under->x,
							Draw_Context->Current->modify_under->y,
							Properties->size, Properties->size, 0, 360*64);
			Draw_Context->Current->modify_under->x += Properties->size;
	
			break;
	}

	
	return 0;
}

gboolean draw_bg( void *hook_data, void *call_data)
{
	PropertiesBG *Properties = (PropertiesBG*)hook_data;
	DrawContext *Draw_Context = (DrawContext*)call_data;

	gdk_gc_set_foreground(Draw_Context->gc, Properties->color);


	gdk_draw_rectangle(Draw_Context->drawable, Draw_Context->gc,
					TRUE,
					Draw_Context->Previous->over->x,
					Draw_Context->Previous->over->y,
					Draw_Context->Current->over->x - Draw_Context->Previous->over->x,
					Draw_Context->Previous->under->y);

	return 0;
}
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	*
b782dd11	8	* This file provides an API which is meant to be reusable for all viewers that
	9	* need to show information in line, icon, text, background or point form in
	10	* a drawable area having time for x axis. The y axis, in the control flow
	11	* viewer case, is corresponding to the different processes, but it can be
	12	* reused integrally for cpu, and eventually locks, buffers, network
	13	* interfaces... What will differ between the viewers is the precise
	14	* information which interests us. We may think that the most useful
	15	* information for control flow are some specific events, like schedule
	16	* change, and processes'states. It may differ for a cpu viewer : the
	17	* interesting information could be more the execution mode of each cpu.
	18	* This API in meant to make viewer's writers life easier : it will become
	19	* a simple choice of icons and line types for the precise information
	20	* the viewer has to provide (agremented with keeping supplementary records
	21	* and modifying slightly the DrawContext to suit the needs.)
	22	*
f0728492	23	* We keep each data type in attributes, keys to specific information
	24	* being formed from the GQuark corresponding to the information received.
	25	* (facilities / facility_name / events / eventname.)
	26	* (cpus/cpu_name, process_states/ps_name,
	27	* execution_modes/em_name, execution_submodes/es_name).
cf6cb7e0	28	* The goal is then to provide a generic way to print information on the
	29	* screen for all this different information.
	30	*
	31	* Information can be printed as
	32	*
	33	* - text (text + color + size + position (over or under line)
	34	* - icon (icon filename, corresponding to a loaded icon, accessible through
	35	* a GQuark. Icons are loaded statically at the guiControlFlow level during
	36	* module initialization and can be added on the fly if not present in the
	37	* GQuark.) The habitual place for xpm icons is in
	38	* ${prefix}/share/LinuxTraceToolkit.) + position (over or under line)
	39	* - line (color, width, style)
189a5d08	40	* - Arc (big points) (color, size)
cf6cb7e0	41	* - background color (color)
cf6cb7e0	42	*
189a5d08	43	* An item is a leaf of the attributes tree. It is, in that case, including
	44	* all kind of events categories we can have. It then associates each category
	45	* with one or more actions (drawing something) or nothing.
	46	*
7d5ffafa	47	* Each item has an array of hooks (hook list). Each hook represents an
7d5ffafa	48	* operation to perform. We seek the array each time we want to
a2e850ff	49	* draw an item. We execute each operation in order. An operation type
	50	* is associated with each hook to permit user listing and modification
	51	* of these operations. The operation type is also used to find the
	52	* corresponding priority for the sorting. Operation type and priorities
	53	* are enum and a static int table.
cf6cb7e0	54	*
cf6cb7e0	55	* The array has to be sorted by priority each time we add a task in it.
a2e850ff	56	* A priority is associated with each operation type. It permits
cf6cb7e0	57	* to perform background color selection before line or text drawing. We also
	58	* draw lines before text, so the text appears over the lines.
	59	*
	60	* Executing all the arrays of operations for a specific event (which
	61	* implies information for state, event, cpu, execution mode and submode)
	62	* has to be done in a same DrawContext. The goal there is to keep the offset
	63	* of the text and icons over and under the middle line, so a specific
	64	* event could be printed as ( R Si 0 for running, scheduled in, cpu 0 ),
7d5ffafa	65	* text being easy to replace with icons. The DrawContext is passed as
7d5ffafa	66	* call_data for the operation hooks.
cf6cb7e0	67	*
b782dd11	68	* We use the lttv global attributes to keep track of the loaded icons.
	69	* If we need an icon, we look for it in the icons / icon name pathname.
	70	* If found, we use the pointer to it. If not, we load the pixmap in
1a31868c	71	* memory and set the pointer to the GdkPixmap in the attributes. The
1a31868c	72	* structure pointed to contains the pixmap and the mask bitmap.
b782dd11	73	*
cf6cb7e0	74	* Author : Mathieu Desnoyers, October 2003
cf6cb7e0	75	*/
7d5ffafa	76
7d5ffafa	77	#include <glib.h>
09e2606f	78	#include <gtk/gtk.h>
09e2606f	79	#include <gdk/gdk.h>
7d5ffafa	80	#include <lttv/hook.h>
f0728492	81	#include <lttv/attribute.h>
f0728492	82	#include <lttv/iattribute.h>
1a31868c	83	#include <string.h>
7d5ffafa	84
b782dd11	85	#include <lttv/processTrace.h>
	86	#include <lttv/state.h>
	87
09e2606f	88	#include "Draw_Item.h"
1a31868c	89
	90
	91	#define MAX_PATH_LEN 256
	92
b782dd11	93	/* The DrawContext keeps information about the current drawing position and
	94	* the previous one, so we can use both to draw lines.
	95	*
	96	* over : position for drawing over the middle line.
	97	* middle : middle line position.
	98	* under : position for drawing under the middle line.
09e2606f	99	*
	100	* the modify_* are used to take into account that we should go forward
	101	* when we draw a text, an arc or an icon, while it's unneeded when we
	102	* draw a line or background.
1a31868c	103	*
b782dd11	104	*/
	105	struct _DrawContext {
	106	GdkDrawable *drawable;
	107	GdkGC *gc;
1a31868c	108
b782dd11	109
	110	DrawInfo *Current;
	111	DrawInfo *Previous;
	112	};
	113
	114	struct _DrawInfo {
	115	ItemInfo *over;
	116	ItemInfo *middle;
	117	ItemInfo *under;
09e2606f	118
	119	ItemInfo *modify_over;
	120	ItemInfo *modify_middle;
	121	ItemInfo *modify_under;
b782dd11	122	};
	123
	124	/* LttvExecutionState is accessible through the LttvTracefileState. Is has
	125	* a pointer to the LttvProcessState which points to the top of stack
	126	* execution state : LttvExecutionState *state.
	127	*
	128	* LttvExecutionState contains (useful here):
	129	* LttvExecutionMode t,
	130	* LttvExecutionSubmode n,
	131	* LttvProcessStatus s
	132	*
	133	*
	134	* LttvTraceState will be used in the case we need the string of the
	135	* different processes, eventtype_names, syscall_names, trap_names, irq_names.
	136	*
	137	* LttvTracefileState also gives the cpu_name and, as it herits from
	138	* LttvTracefileContext, it gives the LttEvent structure, which is needed
	139	* to get facility name and event name.
	140	*/
	141	struct _ItemInfo {
	142	gint x, y;
	143	LttvTraceState *ts;
	144	LttvTracefileState *tfs;
	145	};
	146
1a31868c	147	/*
	148	* Structure used to keep information about icons.
	149	*/
	150	struct _IconStruct {
	151	GdkPixmap *pixmap;
	152	GdkBitmap *mask;
	153	};
	154
b782dd11	155
	156	/*
	157	* The Item element is only used so the DrawOperation is modifiable by users.
	158	* During drawing, only the Hook is needed.
	159	*/
	160	struct _DrawOperation {
	161	DrawableItems Item;
	162	LttvHooks *Hook;
	163	};
	164
	165	/*
	166	* We define here each items that can be drawn, together with their
	167	* associated priority. Many item types can have the same priority,
	168	* it's only used for quicksorting the operations when we add a new one
	169	* to the array of operations to perform. Lower priorities are executed
	170	* first. So, for example, we may want to give background color a value
	171	* of 10 while a line would have 20, so the background color, which
	172	* is in fact a rectangle, does not hide the line.
	173	*/
	174
09e2606f	175	static int Items_Priorities[] = {
b782dd11	176	50, /* ITEM_TEXT */
	177	40, /* ITEM_ICON */
	178	20, /* ITEM_LINE */
	179	30, /* ITEM_POINT */
	180	10 /* ITEM_BACKGROUND */
	181	};
	182
b782dd11	183	/*
	184	* Here are the different structures describing each item type that can be
	185	* drawn. They contain the information necessary to draw the item : not the
	186	* position (this is provided by the DrawContext), but the text, icon name,
	187	* line width, color; all the properties of the specific items.
	188	*/
	189
	190	struct _PropertiesText {
	191	GdkColor *foreground;
	192	GdkColor *background;
	193	gint size;
	194	gchar *Text;
	195	RelPos position;
	196	};
	197
	198
	199	struct _PropertiesIcon {
	200	gchar *icon_name;
	201	gint width;
	202	gint height;
	203	RelPos position;
	204	};
	205
	206	struct _PropertiesLine {
	207	GdkColor *color;
	208	gint line_width;
	209	GdkLineStyle style;
	210	RelPos position;
	211	};
	212
	213	struct _PropertiesArc {
	214	GdkColor *color;
	215	gint size; /* We force circle by width = height */
	216	gboolean filled;
	217	RelPos position;
	218	};
	219
	220	struct _PropertiesBG {
	221	GdkColor *color;
	222	};
	223
	224
b782dd11	225	/* Drawing hook functions */
4c69e0cc	226	gboolean draw_text( void hook_data, void call_data)
b782dd11	227	{
	228	PropertiesText Properties = (PropertiesText)hook_data;
	229	DrawContext Draw_Context = (DrawContext)call_data;
09e2606f	230
	231	PangoContext *context;
	232	PangoLayout *layout;
	233	PangoFontDescription *FontDesc;// = pango_font_description_new();
	234	gint Font_Size;
	235	PangoRectangle ink_rect;
	236
	237	gdk_gc_set_foreground(Draw_Context->gc, Properties->foreground);
	238	gdk_gc_set_background(Draw_Context->gc, Properties->background);
	239
	240	layout = gtk_widget_create_pango_layout(GTK_WIDGET(Draw_Context->drawable), NULL);
	241	context = pango_layout_get_context(layout);
	242	FontDesc = pango_context_get_font_description(context);
	243	Font_Size = pango_font_description_get_size(FontDesc);
	244	pango_font_description_set_size(FontDesc, Properties->size*PANGO_SCALE);
	245
	246
	247	pango_layout_set_text(layout, Properties->Text, -1);
	248	pango_layout_get_pixel_extents(layout, &ink_rect, NULL);
	249	switch(Properties->position) {
	250	case OVER:
	251	gdk_draw_layout(Draw_Context->drawable, Draw_Context->gc,
	252	Draw_Context->Current->modify_over->x,
	253	Draw_Context->Current->modify_over->y,
	254	layout);
	255	Draw_Context->Current->modify_over->x += ink_rect.width;
	256
	257	break;
	258	case MIDDLE:
	259	gdk_draw_layout(Draw_Context->drawable, Draw_Context->gc,
	260	Draw_Context->Current->modify_middle->x,
	261	Draw_Context->Current->modify_middle->y,
	262	layout);
	263	Draw_Context->Current->modify_middle->x += ink_rect.width;
	264	break;
	265	case UNDER:
	266	gdk_draw_layout(Draw_Context->drawable, Draw_Context->gc,
	267	Draw_Context->Current->modify_under->x,
	268	Draw_Context->Current->modify_under->y,
	269	layout);
	270	Draw_Context->Current->modify_under->x += ink_rect.width;
	271	break;
	272	}
	273
	274
	275	pango_font_description_set_size(FontDesc, Font_Size);
	276	g_free(layout);
	277
	278	return 0;
b782dd11	279	}
b782dd11	280
1a31868c	281
	282	/* To speed up the process, search in already loaded icons list first. Only
	283	* load it if not present.
	284	*/
4c69e0cc	285	gboolean draw_icon( void hook_data, void call_data)
b782dd11	286	{
	287	PropertiesIcon Properties = (PropertiesIcon)hook_data;
	288	DrawContext Draw_Context = (DrawContext)call_data;
	289
1a31868c	290	LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes());
	291	LttvAttributeValue value;
	292	gchar icon_name[MAX_PATH_LEN] = "icons/";
	293	IconStruct *icon_info;
	294
	295	strcat(icon_name, Properties->icon_name);
	296
	297	g_assert(lttv_iattribute_find_by_path(attributes, icon_name,
	298	LTTV_POINTER, &value));
	299	if(*(value.v_pointer) == NULL)
	300	{
	301	*(value.v_pointer) = icon_info = g_new(IconStruct,1);
	302
	303	icon_info->pixmap = gdk_pixmap_create_from_xpm(Draw_Context->drawable,
	304	&icon_info->mask, NULL, Properties->icon_name);
	305	}
	306	else
	307	{
	308	icon_info = *(value.v_pointer);
	309	}
	310
	311	gdk_gc_set_clip_mask(Draw_Context->gc, icon_info->mask);
	312
09e2606f	313	switch(Properties->position) {
09e2606f	314	case OVER:
1a31868c	315	gdk_gc_set_clip_origin(
	316	Draw_Context->gc,
	317	Draw_Context->Current->modify_over->x,
	318	Draw_Context->Current->modify_over->y);
09e2606f	319	gdk_draw_drawable(Draw_Context->drawable,
1a31868c	320	Draw_Context->gc,
1a31868c	321	icon_info->pixmap,
09e2606f	322	0, 0,
	323	Draw_Context->Current->modify_over->x,
	324	Draw_Context->Current->modify_over->y,
	325	Properties->width, Properties->height);
	326
	327	Draw_Context->Current->modify_over->x += Properties->width;
	328
	329	break;
	330	case MIDDLE:
1a31868c	331	gdk_gc_set_clip_origin(
	332	Draw_Context->gc,
	333	Draw_Context->Current->modify_middle->x,
	334	Draw_Context->Current->modify_middle->y);
09e2606f	335	gdk_draw_drawable(Draw_Context->drawable,
1a31868c	336	Draw_Context->gc,
1a31868c	337	icon_info->pixmap,
09e2606f	338	0, 0,
	339	Draw_Context->Current->modify_middle->x,
	340	Draw_Context->Current->modify_middle->y,
	341	Properties->width, Properties->height);
	342
09e2606f	343	Draw_Context->Current->modify_middle->x += Properties->width;
	344	break;
	345	case UNDER:
1a31868c	346	gdk_gc_set_clip_origin(
	347	Draw_Context->gc,
	348	Draw_Context->Current->modify_under->x,
	349	Draw_Context->Current->modify_under->y);
09e2606f	350	gdk_draw_drawable(Draw_Context->drawable,
1a31868c	351	Draw_Context->gc,
1a31868c	352	icon_info->pixmap,
09e2606f	353	0, 0,
	354	Draw_Context->Current->modify_under->x,
	355	Draw_Context->Current->modify_under->y,
	356	Properties->width, Properties->height);
	357
	358	Draw_Context->Current->modify_under->x += Properties->width;
	359	break;
	360	}
	361
1a31868c	362	gdk_gc_set_clip_origin(Draw_Context->gc, 0, 0);
1a31868c	363	gdk_gc_set_clip_mask(Draw_Context->gc, NULL);
09e2606f	364
09e2606f	365	return 0;
b782dd11	366	}
b782dd11	367
4c69e0cc	368	gboolean draw_line( void hook_data, void call_data)
b782dd11	369	{
	370	PropertiesLine Properties = (PropertiesLine)hook_data;
	371	DrawContext Draw_Context = (DrawContext)call_data;
	372
09e2606f	373	gdk_gc_set_foreground(Draw_Context->gc, Properties->color);
	374	gdk_gc_set_line_attributes( Draw_Context->gc,
	375	Properties->line_width,
	376	Properties->style,
	377	GDK_CAP_BUTT,
	378	GDK_JOIN_MITER);
	379
	380	switch(Properties->position) {
	381	case OVER:
	382	drawing_draw_line(
	383	NULL, Draw_Context->drawable,
	384	Draw_Context->Previous->over->x,
	385	Draw_Context->Previous->over->y,
	386	Draw_Context->Current->over->x,
	387	Draw_Context->Current->over->y,
	388	Draw_Context->gc);
	389	break;
	390	case MIDDLE:
	391	drawing_draw_line(
	392	NULL, Draw_Context->drawable,
	393	Draw_Context->Previous->middle->x,
	394	Draw_Context->Previous->middle->y,
	395	Draw_Context->Current->middle->x,
	396	Draw_Context->Current->middle->y,
	397	Draw_Context->gc);
	398	break;
	399	case UNDER:
	400	drawing_draw_line(
	401	NULL, Draw_Context->drawable,
	402	Draw_Context->Previous->under->x,
	403	Draw_Context->Previous->under->y,
	404	Draw_Context->Current->under->x,
	405	Draw_Context->Current->under->y,
	406	Draw_Context->gc);
	407
	408	break;
	409	}
	410
	411	return 0;
b782dd11	412	}
b782dd11	413
4c69e0cc	414	gboolean draw_arc( void hook_data, void call_data)
b782dd11	415	{
	416	PropertiesArc Properties = (PropertiesArc)hook_data;
	417	DrawContext Draw_Context = (DrawContext)call_data;
	418
09e2606f	419	gdk_gc_set_foreground(Draw_Context->gc, Properties->color);
	420
	421	switch(Properties->position) {
	422	case OVER:
	423	gdk_draw_arc(Draw_Context->drawable, Draw_Context->gc,
	424	Properties->filled,
	425	Draw_Context->Current->modify_over->x,
	426	Draw_Context->Current->modify_over->y,
	427	Properties->size, Properties->size, 0, 360*64);
	428	Draw_Context->Current->modify_over->x += Properties->size;
	429
	430	break;
	431	case MIDDLE:
	432	gdk_draw_arc(Draw_Context->drawable, Draw_Context->gc,
	433	Properties->filled,
	434	Draw_Context->Current->modify_middle->x,
	435	Draw_Context->Current->modify_middle->y,
	436	Properties->size, Properties->size, 0, 360*64);
	437	Draw_Context->Current->modify_middle->x += Properties->size;
	438
	439	break;
	440	case UNDER:
	441	gdk_draw_arc(Draw_Context->drawable, Draw_Context->gc,
	442	Properties->filled,
	443	Draw_Context->Current->modify_under->x,
	444	Draw_Context->Current->modify_under->y,
	445	Properties->size, Properties->size, 0, 360*64);
	446	Draw_Context->Current->modify_under->x += Properties->size;
	447
	448	break;
	449	}
	450
	451
	452	return 0;
b782dd11	453	}
b782dd11	454
4c69e0cc	455	gboolean draw_bg( void hook_data, void call_data)
b782dd11	456	{
	457	PropertiesBG Properties = (PropertiesBG)hook_data;
	458	DrawContext Draw_Context = (DrawContext)call_data;
	459
09e2606f	460	gdk_gc_set_foreground(Draw_Context->gc, Properties->color);
	461
	462
	463	gdk_draw_rectangle(Draw_Context->drawable, Draw_Context->gc,
	464	TRUE,
	465	Draw_Context->Previous->over->x,
	466	Draw_Context->Previous->over->y,
	467	Draw_Context->Current->over->x - Draw_Context->Previous->over->x,
	468	Draw_Context->Previous->under->y);
	469
	470	return 0;
b782dd11	471	}
	472
	473