chart.c

系统任务管理器

/* GKrellM
|  Copyright (C) 1999-2006 Bill Wilson
|
|  Author:  Bill Wilson    [e-mail]
|  Latest versions might be found at:  http://gkrellm.net
|
|  This program is free software which I release under the GNU General Public
|  License. You may redistribute and/or modify this program under the terms
|  of that license as published by the Free Software Foundation; either
|  version 2 of the License, or (at your option) any later version.
|
|  This program is distributed in the hope that it will be useful,
|  but WITHOUT ANY WARRANTY; without even the implied warranty of
|  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
|  GNU General Public License for more details.  Version 2 is in the
|  COPYRIGHT file in the top level directory of this distribution.
| 
|  To get a copy of the GNU General Puplic License, write to the Free Software
|  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "gkrellm.h"
#include "gkrellm-private.h"

#include <math.h>


static void	set_grid_resolution_spin_button(GkrellmChart *, gint);


  /* For grid images of height 2 pixels, make room at bottom of chartdata
  |  window so both pixel lines will show.
  */
#define GRID_HEIGHT_Y_OFFSET_ADJUST(cp) \
		(( gdk_pixbuf_get_height((cp)->bg_grid_piximage->pixbuf) < 2) ? 0 : 1)

  /* Map internal y values with origin at lower left to X screen coordinates
  |  which have origin at upper left.
  */
#define Y_SCREEN_MAP(cp,y)	((cp)->h - (y) - 1)


#define	MIN_CHARTHEIGHT	5
#define	MAX_CHARTHEIGHT	200

static GList	*chart_list;

// #define DEBUG1
// #define DEBUG2
// #define DEBUG3

/* ----------------------------------------------------------------------- */

static gint
computed_index(GkrellmChart *cp, gint i)
	{
	gint	x;
	
	x = (cp->position + i + 1) % cp->w;
	return x;
	}

GList *
gkrellm_get_chart_list()
	{
	return chart_list;
	}

gint
gkrellm_get_chart_scalemax(GkrellmChart *cp)
	{
	if (!cp)
		return 0;
	return cp->scale_max;
	}

gint
gkrellm_get_current_chartdata(GkrellmChartdata *cd)
	{
	if (!cd)
		return 0;
	return cd->data[cd->chart->position];
	}

gint
gkrellm_get_chartdata_data(GkrellmChartdata *cd, gint index)
	{
	gint	x;

	if (!cd)
		return 0;
	x = computed_index(cd->chart, index);
	return cd->data[x];
	}

void
gkrellm_clear_chart(GkrellmChart *cp)
	{
	if (!cp)
		return;
	gdk_draw_drawable(cp->pixmap, _GK.draw1_GC, cp->bg_src_pixmap,
						0, 0,	0, 0,   cp->w, cp->h);
	gdk_draw_drawable(cp->bg_pixmap, _GK.draw1_GC, cp->bg_src_pixmap,
						0, 0,	0, 0,   cp->w, cp->h);
	if (cp->drawing_area->window)
		gdk_draw_drawable(cp->drawing_area->window, _GK.draw1_GC, cp->pixmap,
						0, 0,	0, 0,   cp->w, cp->h);
	}

void
gkrellm_clear_chart_pixmap(GkrellmChart *cp)
	{
	if (!cp)
		return;
	gdk_draw_drawable(cp->pixmap, _GK.draw1_GC, cp->bg_src_pixmap,
						0, 0,	0, 0,   cp->w, cp->h);
	gdk_draw_drawable(cp->bg_pixmap, _GK.draw1_GC, cp->bg_src_pixmap,
						0, 0,	0, 0,   cp->w, cp->h);
	}

void
gkrellm_clean_bg_src_pixmap(GkrellmChart *cp)
	{
	if (!cp)
		return;
	if (!gkrellm_winop_draw_rootpixmap_onto_transparent_chart(cp))
		gdk_draw_drawable(cp->bg_src_pixmap, _GK.draw1_GC,
				cp->bg_clean_pixmap, 0, 0, 0, 0, cp->w, cp->h);
	cp->bg_sequence_id += 1;
	}

void
gkrellm_draw_chart_grid_line(GkrellmChart *cp, GdkPixmap *pixmap, gint y)
	{
	gint	h;

	if (!cp)
		return;
	gdk_drawable_get_size(cp->bg_grid_pixmap, NULL, &h);
	gdk_draw_drawable(pixmap, _GK.draw1_GC,
				cp->bg_grid_pixmap, 0, 0, cp->x, y, cp->w, h);
	}

void
gkrellm_draw_chart_to_screen(GkrellmChart *cp)
	{
	/* Draw the expose pixmap onto the screen.
	*/
	if (cp && cp->drawing_area->window)
		gdk_draw_drawable(cp->drawing_area->window, _GK.draw1_GC, cp->pixmap,
						0, 0,	0, 0,   cp->w, cp->h);
	}

static void
default_draw_chart_function(GkrellmChart *cp)
	{
	if (!cp)
		return;
	gkrellm_draw_chartdata(cp);
	gkrellm_draw_chart_to_screen(cp);
	}

void
gkrellm_set_draw_chart_function(GkrellmChart *cp, void (*func)(), gpointer data)
	{
	if (!cp)
		return;
	cp->draw_chart = func;
	cp->draw_chart_data = data;
	}

void
gkrellm_scale_chartdata(GkrellmChartdata *cd, gint multiplier, gint divisor)
	{
	gint	i;

	if (!cd || !cd->data || divisor < 1)
		return;
	for (i = 0; i < cd->chart->w; ++i)
		cd->data[i] = cd->data[i] * multiplier / divisor;
	cd->previous = cd->previous * multiplier / divisor;
	}

void
gkrellm_offset_chartdata(GkrellmChartdata *cd, gint offset)
	{
	gint	i;

	if (!cd || !cd->data)
		return;
	for (i = 0; i < cd->chart->w; ++i)
		cd->data[i] = cd->data[i] + offset;
	cd->previous = cd->previous + offset;
	}

void
gkrellm_reset_chart(GkrellmChart *cp)
	{
	GList			*list;
	GkrellmChartdata *cd;
	gint			i;

	cp->scale_max = 0;
	cp->maxval = 0;
	cp->redraw_all = TRUE;
	cp->position = cp->w - 1;
	cp->primed = FALSE;

	for (list = cp->cd_list; list; list = list->next)
		{
		cd = (GkrellmChartdata *) list->data;
		cd->maxval = 0;
		cd->previous = 0;
		if (cd->data)
			for (i = 0; i < cp->w; ++i)
				cd->data[i] = 0;
		}
	}

void
gkrellm_reset_and_draw_chart(GkrellmChart *cp)
	{
	if (!cp)
		return;
	gkrellm_reset_chart(cp);
	if (cp->draw_chart)
		(*(cp->draw_chart))(cp->draw_chart_data);
	}

void
gkrellm_monotonic_chartdata(GkrellmChartdata *cd, gboolean value)
	{
	if (cd)
		cd->monotonic = value;
	}

void
gkrellm_set_chartdata_draw_style(GkrellmChartdata *cd, gint dstyle)
	{
	if (cd)
		cd->draw_style = dstyle;
	}

void
gkrellm_set_chartdata_draw_style_default(GkrellmChartdata *cd, gint dstyle)
	{
	if (cd && cd->chart->config && !cd->chart->config->config_loaded)
		cd->draw_style = dstyle;
	}

void
gkrellm_set_chartdata_flags(GkrellmChartdata *cd, gint flags)
	{
	if (cd)
		cd->flags = flags;
	}

static gint
chartdata_ycoord(GkrellmChart *cp, GkrellmChartdata *cd, gint yd)
	{
	glong	y;
	guint64	Y;
	
	if (cp->scale_max <= 0)
		cp->scale_max = 1;

	if (yd > 2000000000 / MAX_CHARTHEIGHT)
		{
		Y = (guint64) yd * (guint64) cd->h;
		y = Y / cp->scale_max;
		}
	else
		y = ((glong) yd * cd->h / cp->scale_max);

	if (y < 0)
		y = 0;
	if (y >= cd->h)
		y = cd->h - 1;
	if (cd->inverted)
		y = cd->h - y - 1;
	y += cd->y;
	return Y_SCREEN_MAP(cp, y);
	}

static void
draw_layer_grid_lines(GkrellmChart *cp)
	{
	GList			*list;
	GkrellmChartdata *cd;
	gint			y, y0, h, grid_res, lines;
	gint			active_split, current_split;
	gboolean		do_next_split, done_once_per_split, tmp;

	gdk_draw_drawable(cp->bg_pixmap, _GK.draw1_GC,
				cp->bg_src_pixmap, 0, 0,  0, 0,  cp->w, cp->h);
	do_next_split = TRUE;
	for (active_split = 0; do_next_split; ++active_split)
		{
		do_next_split = FALSE;
		done_once_per_split = FALSE;
		current_split = 0;
		for (list = cp->cd_list; list; list = list->next)
			{
			cd = (GkrellmChartdata *) list->data;
			if (cd->hide)
				continue;
			current_split += cd->split_chart;
			if (active_split != current_split)
				{
				if (current_split > active_split)
					do_next_split = TRUE;
				continue;
				}
			gdk_draw_drawable(cd->layer.pixmap, _GK.draw1_GC,
					*(cd->layer.src_pixmap), 0, 0,  0, 0,  cp->w, cp->h);

			grid_res = cp->config->grid_resolution;
			lines = cp->scale_max / grid_res;
			if (lines && cd->h / lines > 2)	/* No grids if h is too small */
				{
				for (y = 0; y <= cp->scale_max; y += grid_res)
					{
					if (   _GK.bg_grid_mode == GRID_MODE_RESTRAINED
						&& ((y == 0 && cp->y == 0) || y == cp->scale_max)
					   )
						continue;
					tmp = cd->inverted;	  /* Draw grid lines in one direction*/
					cd->inverted = FALSE; /* else, may not line up by 1 pixel*/
					y0 = chartdata_ycoord(cp, cd, y);
					cd->inverted = tmp;
					gdk_drawable_get_size(cd->layer.grid_pixmap, NULL, &h);
					gdk_draw_drawable(cd->layer.pixmap, _GK.draw1_GC,
						cd->layer.grid_pixmap, 0, 0, cp->x, y0, cp->w, h);

					if (!done_once_per_split)
						{
						gdk_drawable_get_size(cp->bg_grid_pixmap, NULL, &h);
						gdk_draw_drawable(cp->bg_pixmap, _GK.draw1_GC,
							cp->bg_grid_pixmap, 0, 0, cp->x, y0, cp->w, h);
						}
					}
				}
			if (current_split > 0 && !done_once_per_split)
				{
				y = cd->y - 1;		/* Get separator y value */
				y -= GRID_HEIGHT_Y_OFFSET_ADJUST(cp);
				if (y >= 0)
					{
					gdk_draw_drawable(cp->bg_pixmap, _GK.draw1_GC,
							_GK.bg_separator_pixmap,
							0, 0, cp->x, Y_SCREEN_MAP(cp, y),
							cp->w, _GK.bg_separator_height);
					}
				}
			done_once_per_split = TRUE;
			}
		}
	}

  /* Return TRUE as long as there is a next split with impulse data needing
  |  to be drawn.
  */
static gboolean
draw_chartdata_impulses(GkrellmChart *cp, GList *cd_list,
			gint i0, gint active_split)
	{
	GList			*list;
	GkrellmChartdata *cd;
	gint			n, x, y, y0, y1, yN, yI;
	gint			current_split;
	gboolean		need_next_split = FALSE;

	if (!cd_list)
		return FALSE;
	for (n = i0; n < cp->w; ++n)
		{
		x = computed_index(cp, n);
		y0 = y1 = -1;
		yN = yI = 0;
		current_split = 0;
		for (list = cp->cd_list; list; list= list->next)
			{
			cd = (GkrellmChartdata *) list->data;
			if (cd->hide)
				continue;
			current_split += cd->split_chart;
			if (   cd->draw_style != CHARTDATA_IMPULSE
				|| current_split != active_split
			   )
				{
				if (   current_split > active_split
					&& cd->draw_style == CHARTDATA_IMPULSE
				   )
					need_next_split = TRUE;
				continue;
				}
			if (cd->inverted)
				{
				if (y1 < 0)
					y1 = chartdata_ycoord(cp, cd, 0);
				yI += cd->data[x];
				y = chartdata_ycoord(cp, cd, yI);
				if (cd->data[x] > 0)
					gdk_draw_line(cd->data_bitmap, _GK.bit1_GC, n, y1, n, y);
				y1 = y;
				}
			else
				{
				if (y0 < 0)
					y0 = chartdata_ycoord(cp, cd, 0);
				yN += cd->data[x];
				y = chartdata_ycoord(cp, cd, yN);
				if (cd->data[x] > 0)
					gdk_draw_line(cd->data_bitmap, _GK.bit1_GC, n, y0, n, y);
				y0 = y;
				}
			}
		}
	/* Push the grided pixmaps through the data bitmaps onto the expose pixmap
	*/
	current_split = 0;
	for (list = cp->cd_list; list; list = list->next)
		{
		cd = (GkrellmChartdata *) list->data;
		if (cd->hide)
			continue;
		current_split += cd->split_chart;
		if (cd->draw_style == CHARTDATA_LINE || current_split != active_split)
			continue;
		if (cd->maxval > 0)
			{
			y0 = chartdata_ycoord(cp, cd, 0);
			y1 = chartdata_ycoord(cp, cd, cd->maxval);
			gdk_gc_set_clip_mask(_GK.draw1_GC, cd->data_bitmap);
			if (cd->inverted)
				gdk_draw_drawable(cp->pixmap, _GK.draw1_GC, cd->layer.pixmap,
						0, y0,  0, y0,  cp->w, y1 - y0 + 1);
			else
				gdk_draw_drawable(cp->pixmap, _GK.draw1_GC, cd->layer.pixmap,
						0, y1,  0, y1,  cp->w, y0 - y1 + 1);
			}
		}
	return need_next_split;
	}

static gint
fix_y(gint yn, gint yp, gint ypp)
	{
	gint	y;

	if (yp > ypp && yn < yp)
		{
		y = (yp + yn) / 2;
		if (y < ypp)
			y = ypp;
		}
	else if (yp < ypp && yn > yp)
		{
		y = (yp + yn) / 2;
		if (y > ypp)
			y = ypp;
		}
	else
		y = yp;
	return y;
	}

static void
draw_chartdata_lines(GkrellmChart *cp, GkrellmChartdata *cd, gint i0)
	{
	gint	n, x, xp, y, y0, y1;

	y0 = chartdata_ycoord(cp, cd, 0);
	for (n = i0; n < cp->w; ++n)
		{
		x = computed_index(cp, n);
		y1 = chartdata_ycoord(cp, cd, cd->data[x]);
		if (n == 0)
			cd->y_p = y1;
		else if (!cd->y_p_valid && i0 == cp->w - 1)
			{
			if ((xp = x - 1) < 0)
				xp = cp->w - 1;
			cd->y_p = cd->y_pp = chartdata_ycoord(cp, cd, cd->data[xp]);
			}
		y = fix_y(y1, cd->y_p, cd->y_pp);
		cd->y_pp = y;
		cd->y_p = y1;
		cd->y_p_valid = FALSE;	/* Need a store_chartdata to make it valid */
		if (cd->data[x] > 0 || (cd->inverted ? (y > y0) : (y < y0)))
			{
			if (y == y1)
				gdk_draw_point(cd->data_bitmap, _GK.bit1_GC, cp->x + n, y1);
			else
				gdk_draw_line(cd->data_bitmap, _GK.bit1_GC,
						cp->x + n, y, cp->x + n, y1);
			}
		}
	/* Push the grided pixmap through the data bitmap onto the expose pixmap
	*/
	if (cd->maxval > 0)
		{
		y0 = chartdata_ycoord(cp, cd, 0);
		y1 = chartdata_ycoord(cp, cd, cd->maxval);
		gdk_gc_set_clip_mask(_GK.draw1_GC, cd->data_bitmap);
		if (cd->inverted)
			gdk_draw_drawable(cp->pixmap, _GK.draw1_GC, cd->layer.pixmap,
					0, y0,  0, y0,  cp->w, y1 - y0 + 1);
		else
			gdk_draw_drawable(cp->pixmap, _GK.draw1_GC, cd->layer.pixmap,
					0, y1,  0, y1,  cp->w, y0 - y1 + 1);
		}
	}

  /* See the README for description of auto grid resolution behavior.
  */
static void
set_auto_grid_resolution(GkrellmChart *cp, gint maxval)
	{
	GkrellmChartconfig	*cf = cp->config;
	gint				grids, grid_res, maxval_base;

	if (maxval <= cp->maxval_auto_base)
		maxval = cp->maxval_auto_base;
	else
		{
		if (maxval > cp->maxval_peak)
			cp->maxval_peak = maxval;