gnuplot/src/multiplot.c at 5.5 · gnuplot/gnuplot · GitHub

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/* GNUPLOT - term.c */

/*[

* Permission to use, copy, and distribute this software and its

* documentation for any purpose with or without fee is hereby granted,

* provided that the above copyright notice appear in all copies and

* that both that copyright notice and this permission notice appear

* in supporting documentation.

* Permission to modify the software is granted, but not the right to

* distribute the complete modified source code. Modifications are to

* be distributed as patches to the released version. Permission to

* distribute binaries produced by compiling modified sources is granted,

* provided you

* 1. distribute the corresponding source modifications from the

* released version in the form of a patch file along with the binaries,

* 2. add special version identification to distinguish your version

* in addition to the base release version number,

* 3. provide your name and address as the primary contact for the

* support of your modified version, and

* 4. retain our contact information in regard to use of the base

* software.

* Permission to distribute the released version of the source code along

* with corresponding source modifications in the form of a patch file is

* granted with same provisions 2 through 4 for binary distributions.

* This software is provided "as is" without express or implied warranty

* to the extent permitted by applicable law.

]*/

* Bookkeeping and support routines for 'set multiplot layout ...'

* Jul 2004 Volker Dobler layout rows, columns

* Feb 2013 Christoph Bersch layout margins spacing

* Mar 2014 Ethan A Merritt refactor into separate file (used to be in term.c)

#include "term_api.h"

#include "multiplot.h"

#include "command.h"

#include "gadgets.h"

#include "graphics.h"

#include "parse.h"

#include "setshow.h"

#include "util.h"

static void mp_layout_size_and_offset(void);

static void mp_layout_margins_and_spacing(void);

static void mp_layout_set_margin_or_spacing(t_position *);

enum set_multiplot_id {

S_MULTIPLOT_LAYOUT,

S_MULTIPLOT_COLUMNSFIRST, S_MULTIPLOT_ROWSFIRST, S_MULTIPLOT_SCALE,

S_MULTIPLOT_DOWNWARDS, S_MULTIPLOT_UPWARDS,

S_MULTIPLOT_OFFSET, S_MULTIPLOT_TITLE,

S_MULTIPLOT_MARGINS, S_MULTIPLOT_SPACING,

S_MULTIPLOT_INVALID

};

static const struct gen_table set_multiplot_tbl[] =

{

{ "lay$out", S_MULTIPLOT_LAYOUT },

{ "col$umnsfirst", S_MULTIPLOT_COLUMNSFIRST },

{ "row$sfirst", S_MULTIPLOT_ROWSFIRST },

{ "down$wards", S_MULTIPLOT_DOWNWARDS },

{ "up$wards", S_MULTIPLOT_UPWARDS },

{ "sca$le", S_MULTIPLOT_SCALE },

{ "off$set", S_MULTIPLOT_OFFSET },

{ "ti$tle", S_MULTIPLOT_TITLE },

{ "ma$rgins", S_MULTIPLOT_MARGINS },

{ "spa$cing", S_MULTIPLOT_SPACING },

{ NULL, S_MULTIPLOT_INVALID }

};

# define MP_LAYOUT_DEFAULT { \

FALSE, /* auto_layout */ \

0, /* current_panel */ \

0, 0, /* num_rows, num_cols */ \

FALSE, /* row_major */ \

TRUE, /* downwards */ \

0, 0, /* act_row, act_col */ \

1, 1, /* xscale, yscale */ \

0, 0, /* xoffset, yoffset */ \

FALSE, /* auto_layout_margins */ \

{screen, screen, screen, 0.1, -1, -1}, /* lmargin */ \

{screen, screen, screen, 0.9, -1, -1}, /* rmargin */ \

{screen, screen, screen, 0.1, -1, -1}, /* bmargin */ \

{screen, screen, screen, 0.9, -1, -1}, /* tmargin */ \

{screen, screen, screen, 0.05, -1, -1}, /* xspacing */ \

{screen, screen, screen, 0.05, -1, -1}, /* yspacing */ \

0,0,0,0, /* prev_ sizes and offsets */ \

DEFAULT_MARGIN_POSITION, \

DEFAULT_MARGIN_POSITION, /* prev_ margins */ \

EMPTY_LABELSTRUCT, 0.0 \

}

static struct {

TBOOLEAN auto_layout; /* automatic layout if true */

int current_panel; /* initialized to 0, incremented after each plot */

int num_rows; /* number of rows in layout */

int num_cols; /* number of columns in layout */

TBOOLEAN row_major; /* row major mode if true, column major else */

TBOOLEAN downwards; /* prefer downwards or upwards direction */

int act_row; /* actual row in layout */

int act_col; /* actual column in layout */

double xscale; /* factor for horizontal scaling */

double yscale; /* factor for vertical scaling */

double xoffset; /* horizontal shift */

double yoffset; /* horizontal shift */

TBOOLEAN auto_layout_margins;

t_position lmargin, rmargin, bmargin, tmargin;

t_position xspacing, yspacing;

double prev_xsize, prev_ysize, prev_xoffset, prev_yoffset;

t_position prev_lmargin, prev_rmargin, prev_tmargin, prev_bmargin;

/* values before 'set multiplot layout' */

text_label title; /* goes above complete set of plots */

double title_height; /* fractional height reserved for title */

} mp_layout = MP_LAYOUT_DEFAULT;

/* Helper routines */

void

multiplot_next()

{

mp_layout.current_panel++;

if (mp_layout.auto_layout) {

if (mp_layout.row_major) {

mp_layout.act_row++;

if (mp_layout.act_row == mp_layout.num_rows) {

mp_layout.act_row = 0;

mp_layout.act_col++;

if (mp_layout.act_col == mp_layout.num_cols) {

/* int_warn(NO_CARET,"will overplot first plot"); */

mp_layout.act_col = 0;

}

} else { /* column-major */

mp_layout.act_col++;

if (mp_layout.act_col == mp_layout.num_cols ) {

mp_layout.act_col = 0;

mp_layout.act_row++;

if (mp_layout.act_row == mp_layout.num_rows ) {

/* int_warn(NO_CARET,"will overplot first plot"); */

mp_layout.act_row = 0;

}

multiplot_reset();

}

void

multiplot_previous(void)

{

mp_layout.current_panel--;

if (mp_layout.auto_layout) {

if (mp_layout.row_major) {

mp_layout.act_row--;

if (mp_layout.act_row < 0) {

mp_layout.act_row = mp_layout.num_rows-1;

mp_layout.act_col--;

if (mp_layout.act_col < 0) {

/* int_warn(NO_CARET,"will overplot first plot"); */

mp_layout.act_col = mp_layout.num_cols-1;

}

} else { /* column-major */

mp_layout.act_col--;

if (mp_layout.act_col < 0) {

mp_layout.act_col = mp_layout.num_cols-1;

mp_layout.act_row--;

if (mp_layout.act_row < 0) {

/* int_warn(NO_CARET,"will overplot first plot"); */

mp_layout.act_row = mp_layout.num_rows-1;

}

multiplot_reset();

}

int

multiplot_current_panel()

{

return mp_layout.current_panel;

}

void

multiplot_start()

{

TBOOLEAN set_spacing = FALSE;

TBOOLEAN set_margins = FALSE;

c_token++;

/* Only a few options are possible if we are already in multiplot mode */

/* So far we have "next". Maybe also "previous", "clear"? */

if (multiplot) {

if (equals(c_token, "next")) {

c_token++;

if (!mp_layout.auto_layout)

int_error(c_token, "only valid inside an auto-layout multiplot");

multiplot_next();

return;

} else if (almost_equals(c_token, "prev$ious")) {

c_token++;

if (!mp_layout.auto_layout)

int_error(c_token, "only valid inside an auto-layout multiplot");

multiplot_previous();

return;

} else {

term_end_multiplot();

}

/* FIXME: more options should be reset/initialized each time */

mp_layout.auto_layout = FALSE;

mp_layout.auto_layout_margins = FALSE;

mp_layout.current_panel = 0;

mp_layout.title.noenhanced = FALSE;

free(mp_layout.title.text);

mp_layout.title.text = NULL;

free(mp_layout.title.font);

mp_layout.title.font = NULL;

mp_layout.title.boxed = 0;

/* Parse options */

while (!END_OF_COMMAND) {

if (almost_equals(c_token, "ti$tle")) {

c_token++;

parse_label_options(&mp_layout.title, 2);

if (!END_OF_COMMAND)

mp_layout.title.text = try_to_get_string();

parse_label_options(&mp_layout.title, 2);

continue;

}

if (almost_equals(c_token, "lay$out")) {

if (mp_layout.auto_layout)

int_error(c_token, "too many layout commands");

else

mp_layout.auto_layout = TRUE;

c_token++;

if (END_OF_COMMAND)

int_error(c_token,"expecting '<num_cols>,<num_rows>'");

/* read row,col */

mp_layout.num_rows = int_expression();

if (END_OF_COMMAND || !equals(c_token,",") )

int_error(c_token, "expecting ', <num_cols>'");

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting <num_cols>");

mp_layout.num_cols = int_expression();

/* remember current values of the plot size and the margins */

mp_layout.prev_xsize = xsize;

mp_layout.prev_ysize = ysize;

mp_layout.prev_xoffset = xoffset;

mp_layout.prev_yoffset = yoffset;

mp_layout.prev_lmargin = lmargin;

mp_layout.prev_rmargin = rmargin;

mp_layout.prev_bmargin = bmargin;

mp_layout.prev_tmargin = tmargin;

mp_layout.act_row = 0;

mp_layout.act_col = 0;

continue;

}

/* The remaining options are only valid for auto-layout mode */

if (!mp_layout.auto_layout)

int_error(c_token, "only valid in the context of an auto-layout command");

switch(lookup_table(&set_multiplot_tbl[0],c_token)) {

case S_MULTIPLOT_COLUMNSFIRST:

mp_layout.row_major = TRUE;

c_token++;

break;

case S_MULTIPLOT_ROWSFIRST:

mp_layout.row_major = FALSE;

c_token++;

break;

case S_MULTIPLOT_DOWNWARDS:

mp_layout.downwards = TRUE;

c_token++;

break;

case S_MULTIPLOT_UPWARDS:

mp_layout.downwards = FALSE;

c_token++;

break;

case S_MULTIPLOT_SCALE:

c_token++;

mp_layout.xscale = real_expression();

mp_layout.yscale = mp_layout.xscale;

if (!END_OF_COMMAND && equals(c_token,",") ) {

c_token++;

if (END_OF_COMMAND) {

int_error(c_token, "expecting <yscale>");

}

mp_layout.yscale = real_expression();

}

break;

case S_MULTIPLOT_OFFSET:

c_token++;

mp_layout.xoffset = real_expression();

mp_layout.yoffset = mp_layout.xoffset;

if (!END_OF_COMMAND && equals(c_token,",") ) {

c_token++;

if (END_OF_COMMAND) {

int_error(c_token, "expecting <yoffset>");

}

mp_layout.yoffset = real_expression();

}

break;

case S_MULTIPLOT_MARGINS:

c_token++;

if (END_OF_COMMAND)

int_error(c_token,"expecting '<left>,<right>,<bottom>,<top>'");

mp_layout.lmargin.scalex = screen;

mp_layout_set_margin_or_spacing(&(mp_layout.lmargin));

if (!END_OF_COMMAND && equals(c_token,",") ) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting <right>");

mp_layout.rmargin.scalex = mp_layout.lmargin.scalex;

mp_layout_set_margin_or_spacing(&(mp_layout.rmargin));

} else {

int_error(c_token, "expecting <right>");

}

if (!END_OF_COMMAND && equals(c_token,",") ) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting <top>");

mp_layout.bmargin.scalex = mp_layout.rmargin.scalex;

mp_layout_set_margin_or_spacing(&(mp_layout.bmargin));

} else {

int_error(c_token, "expecting <bottom>");

}

if (!END_OF_COMMAND && equals(c_token,",") ) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting <bottom>");

mp_layout.tmargin.scalex = mp_layout.bmargin.scalex;

mp_layout_set_margin_or_spacing(&(mp_layout.tmargin));

} else {

int_error(c_token, "expecting <top>");

}

set_margins = TRUE;

break;

case S_MULTIPLOT_SPACING:

c_token++;

if (END_OF_COMMAND)

int_error(c_token,"expecting '<xspacing>,<yspacing>'");

mp_layout.xspacing.scalex = screen;

mp_layout_set_margin_or_spacing(&(mp_layout.xspacing));

mp_layout.yspacing = mp_layout.xspacing;

if (!END_OF_COMMAND && equals(c_token, ",")) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting <yspacing>");

mp_layout_set_margin_or_spacing(&(mp_layout.yspacing));

}

set_spacing = TRUE;

break;

default:

int_error(c_token,"invalid or duplicate option");

break;

}

if (set_spacing || set_margins) {

if (set_spacing && set_margins) {

if (mp_layout.lmargin.x >= 0 && mp_layout.rmargin.x >= 0

&& mp_layout.tmargin.x >= 0 && mp_layout.bmargin.x >= 0

&& mp_layout.xspacing.x >= 0 && mp_layout.yspacing.x >= 0)

mp_layout.auto_layout_margins = TRUE;

else

int_error(NO_CARET, "must give positive margin and spacing values");

} else if (set_margins) {

mp_layout.auto_layout_margins = TRUE;

mp_layout.xspacing.scalex = screen;

mp_layout.xspacing.x = 0.05;

mp_layout.yspacing.scalex = screen;

mp_layout.yspacing.x = 0.05;

}

/* Sanity check that screen tmargin is > screen bmargin */

if (mp_layout.bmargin.scalex == screen && mp_layout.tmargin.scalex == screen)

if (mp_layout.bmargin.x > mp_layout.tmargin.x) {

double tmp = mp_layout.bmargin.x;

mp_layout.bmargin.x = mp_layout.tmargin.x;

mp_layout.tmargin.x = tmp;

}

/* If we reach here, then the command has been successfully parsed.

* Aug 2013: call term_start_plot() before setting multiplot so that

* the wxt and qt terminals will reset the plot count to 0 before

* ignoring subsequent TERM_LAYER_RESET requests.

term_start_plot();

multiplot = TRUE;

multiplot_count = 0;

fill_gpval_integer("GPVAL_MULTIPLOT", 1);

/* Place overall title before doing anything else */

if (mp_layout.title.text) {

unsigned int x, y;

char *p = mp_layout.title.text;

x = term->xmax / 2;

y = term->ymax - term->v_char;

write_label(x, y, &(mp_layout.title));

reset_textcolor(&(mp_layout.title.textcolor));

/* Calculate fractional height of title compared to entire page */

/* If it would fill the whole page, forget it! */

for (y=1; *p; p++)

if (*p == '\n')

y++;

/* Oct 2012 - v_char depends on the font used */

if (mp_layout.title.font && *mp_layout.title.font)

term->set_font(mp_layout.title.font);

mp_layout.title_height = (double)(y * term->v_char) / (double)term->ymax;

if (mp_layout.title.font && *mp_layout.title.font)

term->set_font("");

if (mp_layout.title_height > 0.9)

mp_layout.title_height = 0.05;

} else {

mp_layout.title_height = 0.0;

}

multiplot_reset();

}

void

multiplot_end()

{

multiplot = FALSE;

multiplot_count = 0;

fill_gpval_integer("GPVAL_MULTIPLOT", 0);

/* reset plot size, origin and margins to values before 'set

multiplot layout' */

if (mp_layout.auto_layout) {

xsize = mp_layout.prev_xsize;

ysize = mp_layout.prev_ysize;

xoffset = mp_layout.prev_xoffset;

yoffset = mp_layout.prev_yoffset;

lmargin = mp_layout.prev_lmargin;

rmargin = mp_layout.prev_rmargin;

bmargin = mp_layout.prev_bmargin;

tmargin = mp_layout.prev_tmargin;

}

/* reset automatic multiplot layout */

mp_layout.auto_layout = FALSE;

mp_layout.auto_layout_margins = FALSE;

mp_layout.xscale = mp_layout.yscale = 1.0;

mp_layout.xoffset = mp_layout.yoffset = 0.0;

mp_layout.lmargin.scalex = mp_layout.rmargin.scalex = screen;

mp_layout.bmargin.scalex = mp_layout.tmargin.scalex = screen;

mp_layout.lmargin.x = mp_layout.rmargin.x = mp_layout.bmargin.x = mp_layout.tmargin.x = -1;

mp_layout.xspacing.scalex = mp_layout.yspacing.scalex = screen;

mp_layout.xspacing.x = mp_layout.yspacing.x = -1;

if (mp_layout.title.text) {

free(mp_layout.title.text);

mp_layout.title.text = NULL;

}

/* Helper function for multiplot auto layout to issue size and offset cmds */

void

multiplot_reset()

{

if (mp_layout.auto_layout_margins)

mp_layout_margins_and_spacing();

else

mp_layout_size_and_offset();

}

static void

mp_layout_size_and_offset(void)

{

if (!mp_layout.auto_layout) return;

/* fprintf(stderr,"col==%d row==%d\n",mp_layout.act_col,mp_layout.act_row); */

/* the 'set size' command */

xsize = mp_layout.xscale / mp_layout.num_cols;

ysize = mp_layout.yscale / mp_layout.num_rows;

/* the 'set origin' command */

xoffset = (double)(mp_layout.act_col) / mp_layout.num_cols;

if (mp_layout.downwards)

yoffset = 1.0 - (double)(mp_layout.act_row+1) / mp_layout.num_rows;

else

yoffset = (double)(mp_layout.act_row) / mp_layout.num_rows;

/* fprintf(stderr,"xoffset==%g yoffset==%g\n", xoffset,yoffset); */

/* Allow a little space at the top for a title */

if (mp_layout.title.text) {

ysize *= (1.0 - mp_layout.title_height);

yoffset *= (1.0 - mp_layout.title_height);

}

/* corrected for x/y-scaling factors and user defined offsets */

xoffset -= (mp_layout.xscale-1)/(2*mp_layout.num_cols);

yoffset -= (mp_layout.yscale-1)/(2*mp_layout.num_rows);

/* fprintf(stderr," xoffset==%g yoffset==%g\n", xoffset,yoffset); */

xoffset += mp_layout.xoffset;

yoffset += mp_layout.yoffset;

/* fprintf(stderr," xoffset==%g yoffset==%g\n", xoffset,yoffset); */

}

/* Helper function for multiplot auto layout to set the explicit plot margins,

if requested with 'margins' and 'spacing' options. */

static void

mp_layout_margins_and_spacing(void)

{

/* width and height of a single sub plot. */

double tmp_width, tmp_height;

double leftmargin, rightmargin, topmargin, bottommargin, xspacing, yspacing;

if (!mp_layout.auto_layout_margins) return;

if (mp_layout.lmargin.scalex == screen)

leftmargin = mp_layout.lmargin.x;

else

leftmargin = (mp_layout.lmargin.x * term->h_char) / term->xmax;

if (mp_layout.rmargin.scalex == screen)

rightmargin = mp_layout.rmargin.x;

else

rightmargin = 1 - (mp_layout.rmargin.x * term->h_char) / term->xmax;

if (mp_layout.tmargin.scalex == screen)

topmargin = mp_layout.tmargin.x;

else

topmargin = 1 - (mp_layout.tmargin.x * term->v_char) / term->ymax;

if (mp_layout.bmargin.scalex == screen)

bottommargin = mp_layout.bmargin.x;

else

bottommargin = (mp_layout.bmargin.x * term->v_char) / term->ymax;

if (mp_layout.xspacing.scalex == screen)

xspacing = mp_layout.xspacing.x;

else

xspacing = (mp_layout.xspacing.x * term->h_char) / term->xmax;

if (mp_layout.yspacing.scalex == screen)

yspacing = mp_layout.yspacing.x;

else

yspacing = (mp_layout.yspacing.x * term->v_char) / term->ymax;

tmp_width = (rightmargin - leftmargin - (mp_layout.num_cols - 1) * xspacing)

/ mp_layout.num_cols;

tmp_height = (topmargin - bottommargin - (mp_layout.num_rows - 1) * yspacing)

/ mp_layout.num_rows;

lmargin.x = leftmargin + mp_layout.act_col * (tmp_width + xspacing);

lmargin.scalex = screen;

rmargin.x = lmargin.x + tmp_width;

rmargin.scalex = screen;

if (mp_layout.downwards) {

bmargin.x = bottommargin + (mp_layout.num_rows - mp_layout.act_row - 1)

* (tmp_height + yspacing);

} else {

bmargin.x = bottommargin + mp_layout.act_row * (tmp_height + yspacing);

}

bmargin.scalex = screen;

tmargin.x = bmargin.x + tmp_height;

tmargin.scalex = screen;

}

static void

mp_layout_set_margin_or_spacing(t_position *margin)

{

margin->x = -1;

if (END_OF_COMMAND)

return;

if (almost_equals(c_token, "sc$reen")) {

margin->scalex = screen;

c_token++;

} else if (almost_equals(c_token, "char$acter")) {

margin->scalex = character;

c_token++;

}

margin->x = real_expression();

if (margin->x < 0)

margin->x = -1;

if (margin->scalex == screen) {

if (margin->x < 0)

margin->x = 0;

if (margin->x > 1)

margin->x = 1;

}

gnuplot/src/multiplot.c at 5.5 · gnuplot/gnuplot · GitHub

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