[gimp] plug-ins: add back wireframe mode using cairo
- From: Mikael Magnusson <mikachu src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp] plug-ins: add back wireframe mode using cairo
- Date: Sun, 20 Feb 2011 12:55:04 +0000 (UTC)
commit 5bd9de23b88dad65cdec1fa8d6698590875dd25a
Author: Mikael Magnusson <mikachu src gnome org>
Date: Sat Feb 19 19:49:34 2011 +0100
plug-ins: add back wireframe mode using cairo
plug-ins/map-object/map-object-main.c | 3 +-
plug-ins/map-object/map-object-main.h | 1 +
plug-ins/map-object/map-object-preview.c | 467 +++++++++++++++++++++++++++++-
plug-ins/map-object/map-object-preview.h | 7 +
plug-ins/map-object/map-object-ui.c | 32 ++-
5 files changed, 496 insertions(+), 14 deletions(-)
---
diff --git a/plug-ins/map-object/map-object-main.c b/plug-ins/map-object/map-object-main.c
index ff0a491..c5e6d5d 100644
--- a/plug-ins/map-object/map-object-main.c
+++ b/plug-ins/map-object/map-object-main.c
@@ -81,7 +81,8 @@ set_default_settings (void)
mapvals.create_new_layer = FALSE;
mapvals.transparent_background = FALSE;
mapvals.tiled = FALSE;
- mapvals.livepreview = TRUE;
+ mapvals.livepreview = FALSE;
+ mapvals.showgrid = TRUE;
mapvals.lightsource.intensity = 1.0;
gimp_rgba_set (&mapvals.lightsource.color, 1.0, 1.0, 1.0, 1.0);
diff --git a/plug-ins/map-object/map-object-main.h b/plug-ins/map-object/map-object-main.h
index 6c78c8c..2757002 100644
--- a/plug-ins/map-object/map-object-main.h
+++ b/plug-ins/map-object/map-object-main.h
@@ -65,6 +65,7 @@ typedef struct
gint transparent_background;
gint tiled;
gint livepreview;
+ gint showgrid;
gint showcaps;
gdouble zoom;
diff --git a/plug-ins/map-object/map-object-preview.c b/plug-ins/map-object/map-object-preview.c
index 92dcad0..2358785 100644
--- a/plug-ins/map-object/map-object-preview.c
+++ b/plug-ins/map-object/map-object-preview.c
@@ -18,8 +18,7 @@
gdouble mat[3][4];
-
-gint lightx, lighty;
+gint lightx, lighty;
/* Protos */
/* ====== */
@@ -32,6 +31,34 @@ static void compute_preview (gint x,
gint ph);
static void draw_light_marker (gint xpos,
gint ypos);
+static void draw_line (cairo_t *cr,
+ gint startx,
+ gint starty,
+ gint pw,
+ gint ph,
+ gdouble cx1,
+ gdouble cy1,
+ gdouble cx2,
+ gdouble cy2,
+ GimpVector3 a,
+ GimpVector3 b);
+
+static void draw_wireframe_plane (gint startx,
+ gint starty,
+ gint pw,
+ gint ph);
+static void draw_wireframe_sphere (gint startx,
+ gint starty,
+ gint pw,
+ gint ph);
+static void draw_wireframe_box (gint startx,
+ gint starty,
+ gint pw,
+ gint ph);
+static void draw_wireframe_cylinder (gint startx,
+ gint starty,
+ gint pw,
+ gint ph);
/**************************************************************/
/* Computes a preview of the rectangle starting at (x,y) with */
@@ -298,9 +325,445 @@ preview_expose (GtkWidget *widget,
cairo_paint (cr);
+ if (mapvals.showgrid)
+ draw_preview_wireframe ();
draw_lights (startx, starty, pw, ph);
cairo_destroy (cr);
return FALSE;
}
+
+/**************************/
+/* Draw preview wireframe */
+/**************************/
+
+void
+draw_preview_wireframe (void)
+{
+ gint startx, starty, pw, ph;
+
+ pw = PREVIEW_WIDTH * mapvals.zoom;
+ ph = PREVIEW_HEIGHT * mapvals.zoom;
+ startx = (PREVIEW_WIDTH - pw) / 2;
+ starty = (PREVIEW_HEIGHT - ph) / 2;
+
+ draw_wireframe (startx, starty, pw, ph);
+}
+
+/****************************/
+/* Draw a wireframe preview */
+/****************************/
+
+void
+draw_wireframe (gint startx,
+ gint starty,
+ gint pw,
+ gint ph)
+{
+ switch (mapvals.maptype)
+ {
+ case MAP_PLANE:
+ draw_wireframe_plane (startx, starty, pw, ph);
+ break;
+ case MAP_SPHERE:
+ draw_wireframe_sphere (startx, starty, pw, ph);
+ break;
+ case MAP_BOX:
+ draw_wireframe_box (startx, starty, pw, ph);
+ break;
+ case MAP_CYLINDER:
+ draw_wireframe_cylinder (startx, starty, pw, ph);
+ break;
+ }
+}
+
+static void
+draw_wireframe_plane (gint startx,
+ gint starty,
+ gint pw,
+ gint ph)
+{
+ GimpVector3 v1, v2, a, b, c, d, dir1, dir2;
+ gint cnt;
+ gdouble x1, y1, x2, y2, cx1, cy1, cx2, cy2, fac;
+ cairo_t *cr;
+
+ cr = gdk_cairo_create (gtk_widget_get_window (previewarea));
+
+ cairo_rectangle (cr, startx, starty, pw, ph);
+ cairo_clip (cr);
+
+ /* Find rotated box corners */
+ /* ======================== */
+
+ gimp_vector3_set (&v1, 0.5, 0.0, 0.0);
+ gimp_vector3_set (&v2, 0.0, 0.5, 0.0);
+
+ gimp_vector3_rotate (&v1,
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+
+ gimp_vector3_rotate (&v2,
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+
+ dir1 = v1; gimp_vector3_normalize (&dir1);
+ dir2 = v2; gimp_vector3_normalize (&dir2);
+
+ fac = 1.0 / (gdouble) WIRESIZE;
+
+ gimp_vector3_mul (&dir1, fac);
+ gimp_vector3_mul (&dir2, fac);
+
+ gimp_vector3_add (&a, &mapvals.position, &v1);
+ gimp_vector3_sub (&b, &a, &v2);
+ gimp_vector3_add (&a, &a, &v2);
+ gimp_vector3_sub (&d, &mapvals.position, &v1);
+ gimp_vector3_sub (&d, &d, &v2);
+
+ c = b;
+
+ cx1 = (gdouble) startx;
+ cy1 = (gdouble) starty;
+ cx2 = cx1 + (gdouble) pw;
+ cy2 = cy1 + (gdouble) ph;
+
+ for (cnt = 0; cnt <= WIRESIZE; cnt++)
+ {
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x1, &y1, &mapvals.viewpoint, &a);
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x2, &y2, &mapvals.viewpoint, &b);
+
+ cairo_move_to (cr, RINT (x1), RINT (y1));
+ cairo_line_to (cr, RINT (x2), RINT (y2));
+
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x1, &y1, &mapvals.viewpoint, &c);
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x2, &y2, &mapvals.viewpoint, &d);
+
+ cairo_move_to (cr, RINT (x1), RINT (y1));
+ cairo_line_to (cr, RINT (x2), RINT (y2));
+
+ gimp_vector3_sub (&a, &a, &dir1);
+ gimp_vector3_sub (&b, &b, &dir1);
+ gimp_vector3_add (&c, &c, &dir2);
+ gimp_vector3_add (&d, &d, &dir2);
+ }
+
+ cairo_set_line_width (cr, 3.0);
+ cairo_stroke_preserve (cr);
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+}
+
+static void
+draw_wireframe_sphere (gint startx,
+ gint starty,
+ gint pw,
+ gint ph)
+{
+ GimpVector3 p[2 * (WIRESIZE + 5)];
+ gint cnt, cnt2;
+ gdouble x1, y1, x2, y2, twopifac, cx1, cy1, cx2, cy2;
+ cairo_t *cr;
+
+ cr = gdk_cairo_create (gtk_widget_get_window (previewarea));
+
+ cairo_rectangle (cr, startx, starty, pw, ph);
+ cairo_clip (cr);
+
+ /* Compute wireframe points */
+ /* ======================== */
+
+ twopifac = (2.0 * G_PI) / WIRESIZE;
+
+ for (cnt = 0; cnt < WIRESIZE; cnt++)
+ {
+ p[cnt].x = mapvals.radius * cos ((gdouble) cnt * twopifac);
+ p[cnt].y = 0.0;
+ p[cnt].z = mapvals.radius * sin ((gdouble) cnt * twopifac);
+ gimp_vector3_rotate (&p[cnt],
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+ gimp_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
+ }
+
+ p[cnt] = p[0];
+
+ for (cnt = WIRESIZE + 1; cnt < 2 * WIRESIZE + 1; cnt++)
+ {
+ p[cnt].x = mapvals.radius * cos ((gdouble) (cnt-(WIRESIZE+1))*twopifac);
+ p[cnt].y = mapvals.radius * sin ((gdouble) (cnt-(WIRESIZE+1))*twopifac);
+ p[cnt].z = 0.0;
+ gimp_vector3_rotate (&p[cnt],
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+ gimp_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
+ }
+
+ p[cnt] = p[WIRESIZE+1];
+ cnt++;
+ cnt2 = cnt;
+
+ /* Find rotated axis */
+ /* ================= */
+
+ gimp_vector3_set (&p[cnt], 0.0, -0.35, 0.0);
+ gimp_vector3_rotate (&p[cnt],
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+ p[cnt+1] = mapvals.position;
+
+ gimp_vector3_set (&p[cnt+2], 0.0, 0.0, -0.35);
+ gimp_vector3_rotate (&p[cnt+2],
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+ p[cnt+3] = mapvals.position;
+
+ p[cnt + 4] = p[cnt];
+ gimp_vector3_mul (&p[cnt + 4], -1.0);
+ p[cnt + 5] = p[cnt + 1];
+
+ gimp_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
+ gimp_vector3_add (&p[cnt + 2], &p[cnt + 2], &mapvals.position);
+ gimp_vector3_add (&p[cnt + 4], &p[cnt + 4], &mapvals.position);
+
+ /* Draw the circles (equator and zero meridian) */
+ /* ============================================ */
+
+ cx1 = (gdouble) startx;
+ cy1 = (gdouble) starty;
+ cx2 = cx1 + (gdouble) pw;
+ cy2 = cy1 + (gdouble) ph;
+
+ for (cnt = 0; cnt < cnt2 - 1; cnt++)
+ {
+ if (p[cnt].z > mapvals.position.z && p[cnt + 1].z > mapvals.position.z)
+ {
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x1, &y1, &mapvals.viewpoint, &p[cnt]);
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x2, &y2, &mapvals.viewpoint, &p[cnt + 1]);
+
+ cairo_move_to (cr, (gint) (x1 + 0.5), (gint) (y1 + 0.5));
+ cairo_line_to (cr, (gint) (x2 + 0.5), (gint) (y2 + 0.5));
+ }
+ }
+
+ /* Draw the axis (pole to pole and center to zero meridian) */
+ /* ======================================================== */
+
+ for (cnt = 0; cnt < 3; cnt++)
+ {
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x1, &y1, &mapvals.viewpoint, &p[cnt2]);
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x2, &y2, &mapvals.viewpoint, &p[cnt2 + 1]);
+
+ cairo_move_to (cr, RINT (x1), RINT (y1));
+ cairo_line_to (cr, RINT (x2), RINT (y2));
+
+ cnt2 += 2;
+ }
+
+ cairo_set_line_width (cr, 3.0);
+ cairo_stroke_preserve (cr);
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+}
+
+static void
+draw_line (cairo_t *cr,
+ gint startx,
+ gint starty,
+ gint pw,
+ gint ph,
+ gdouble cx1,
+ gdouble cy1,
+ gdouble cx2,
+ gdouble cy2,
+ GimpVector3 a,
+ GimpVector3 b)
+{
+ gdouble x1, y1, x2, y2;
+
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x1, &y1, &mapvals.viewpoint, &a);
+ gimp_vector_3d_to_2d (startx, starty, pw, ph,
+ &x2, &y2, &mapvals.viewpoint, &b);
+
+ cairo_move_to (cr, RINT (x1), RINT (y1));
+ cairo_line_to (cr, RINT (x2), RINT (y2));
+}
+
+static void
+draw_wireframe_box (gint startx,
+ gint starty,
+ gint pw,
+ gint ph)
+{
+ GimpVector3 p[8], tmp, scale;
+ gint i;
+ gdouble cx1, cy1, cx2, cy2;
+ cairo_t *cr;
+
+ cr = gdk_cairo_create (gtk_widget_get_window (previewarea));
+
+ cairo_rectangle (cr, startx, starty, pw, ph);
+ cairo_clip (cr);
+
+ /* Compute wireframe points */
+ /* ======================== */
+
+ init_compute ();
+
+ scale = mapvals.scale;
+ gimp_vector3_mul (&scale, 0.5);
+
+ gimp_vector3_set (&p[0], -scale.x, -scale.y, scale.z);
+ gimp_vector3_set (&p[1], scale.x, -scale.y, scale.z);
+ gimp_vector3_set (&p[2], scale.x, scale.y, scale.z);
+ gimp_vector3_set (&p[3], -scale.x, scale.y, scale.z);
+
+ gimp_vector3_set (&p[4], -scale.x, -scale.y, -scale.z);
+ gimp_vector3_set (&p[5], scale.x, -scale.y, -scale.z);
+ gimp_vector3_set (&p[6], scale.x, scale.y, -scale.z);
+ gimp_vector3_set (&p[7], -scale.x, scale.y, -scale.z);
+
+ /* Rotate and translate points */
+ /* =========================== */
+
+ for (i = 0; i < 8; i++)
+ {
+ vecmulmat (&tmp, &p[i], rotmat);
+ gimp_vector3_add (&p[i], &tmp, &mapvals.position);
+ }
+
+ /* Draw the box */
+ /* ============ */
+
+ cx1 = (gdouble) startx;
+ cy1 = (gdouble) starty;
+ cx2 = cx1 + (gdouble) pw;
+ cy2 = cy1 + (gdouble) ph;
+
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[0],p[1]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[1],p[2]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[2],p[3]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[3],p[0]);
+
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[4],p[5]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[5],p[6]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[6],p[7]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[7],p[4]);
+
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[0],p[4]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[1],p[5]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[2],p[6]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[3],p[7]);
+
+ cairo_set_line_width (cr, 3.0);
+ cairo_stroke_preserve (cr);
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+}
+
+static void
+draw_wireframe_cylinder (gint startx,
+ gint starty,
+ gint pw,
+ gint ph)
+{
+ GimpVector3 p[2*8], a, axis, scale;
+ gint i;
+ gdouble cx1, cy1, cx2, cy2;
+ gfloat m[16], l, angle;
+ cairo_t *cr;
+
+ cr = gdk_cairo_create (gtk_widget_get_window (previewarea));
+
+ cairo_rectangle (cr, startx, starty, pw, ph);
+ cairo_clip (cr);
+
+ /* Compute wireframe points */
+ /* ======================== */
+
+ init_compute ();
+
+ scale = mapvals.scale;
+ gimp_vector3_mul (&scale, 0.5);
+
+ l = mapvals.cylinder_length / 2.0;
+ angle = 0;
+
+ gimp_vector3_set (&axis, 0.0, 1.0, 0.0);
+
+ for (i = 0; i < 8; i++)
+ {
+ rotatemat (angle, &axis, m);
+
+ gimp_vector3_set (&a, mapvals.cylinder_radius, 0.0, 0.0);
+
+ vecmulmat (&p[i], &a, m);
+
+ p[i+8] = p[i];
+
+ p[i].y += l;
+ p[i+8].y -= l;
+
+ angle += 360.0 / 8.0;
+ }
+
+ /* Rotate and translate points */
+ /* =========================== */
+
+ for (i = 0; i < 16; i++)
+ {
+ vecmulmat (&a, &p[i], rotmat);
+ gimp_vector3_add (&p[i], &a, &mapvals.position);
+ }
+
+ /* Draw the box */
+ /* ============ */
+
+ cx1 = (gdouble) startx;
+ cy1 = (gdouble) starty;
+ cx2 = cx1 + (gdouble) pw;
+ cy2 = cy1 + (gdouble) ph;
+
+ for (i = 0; i < 7; i++)
+ {
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i],p[i+1]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i+8],p[i+9]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i],p[i+8]);
+ }
+
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[7],p[0]);
+ draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[15],p[8]);
+
+ cairo_set_line_width (cr, 3.0);
+ cairo_stroke_preserve (cr);
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+}
diff --git a/plug-ins/map-object/map-object-preview.h b/plug-ins/map-object/map-object-preview.h
index bd2b20c..bbcfb77 100644
--- a/plug-ins/map-object/map-object-preview.h
+++ b/plug-ins/map-object/map-object-preview.h
@@ -4,6 +4,8 @@
#define PREVIEW_WIDTH 200
#define PREVIEW_HEIGHT 200
+#define WIRESIZE 16
+
/* Externally visible variables */
/* ============================ */
@@ -16,6 +18,11 @@ extern gint lightx,lighty;
void compute_preview_image (void);
gboolean preview_expose (GtkWidget *widget,
GdkEventExpose *eevent);
+void draw_wireframe (gint startx,
+ gint starty,
+ gint pw,
+ gint ph);
+void draw_preview_wireframe (void);
gint check_light_hit (gint xpos,
gint ypos);
void update_light (gint xpos,
diff --git a/plug-ins/map-object/map-object-ui.c b/plug-ins/map-object/map-object-ui.c
index 10aebae..4c97a39 100644
--- a/plug-ins/map-object/map-object-ui.c
+++ b/plug-ins/map-object/map-object-ui.c
@@ -89,30 +89,30 @@ static void
update_light_pos_entries (void)
{
g_signal_handlers_block_by_func (xadj,
- gimp_double_adjustment_update,
+ double_adjustment_update,
&mapvals.lightsource.position.x);
gtk_adjustment_set_value (GTK_ADJUSTMENT (xadj),
mapvals.lightsource.position.x);
g_signal_handlers_unblock_by_func (xadj,
- gimp_double_adjustment_update,
+ double_adjustment_update,
&mapvals.lightsource.position.x);
g_signal_handlers_block_by_func (yadj,
- gimp_double_adjustment_update,
+ double_adjustment_update,
&mapvals.lightsource.position.y);
gtk_adjustment_set_value (GTK_ADJUSTMENT (yadj),
mapvals.lightsource.position.y);
g_signal_handlers_unblock_by_func (yadj,
- gimp_double_adjustment_update,
+ double_adjustment_update,
&mapvals.lightsource.position.y);
g_signal_handlers_block_by_func (zadj,
- gimp_double_adjustment_update,
+ double_adjustment_update,
&mapvals.lightsource.position.z);
gtk_adjustment_set_value (GTK_ADJUSTMENT (zadj),
mapvals.lightsource.position.z);
g_signal_handlers_unblock_by_func (zadj,
- gimp_double_adjustment_update,
+ double_adjustment_update,
&mapvals.lightsource.position.z);
}
@@ -157,9 +157,10 @@ lightmenu_callback (GtkWidget *widget,
}
if (mapvals.livepreview)
- compute_preview_image ();
-
- gtk_widget_queue_draw (previewarea);
+ {
+ compute_preview_image ();
+ gtk_widget_queue_draw (previewarea);
+ }
}
/***************************************/
@@ -523,7 +524,7 @@ create_options_page (void)
_("Antialiasing quality. Higher is better, "
"but slower"), NULL);
g_signal_connect (adj, "value-changed",
- G_CALLBACK (double_adjustment_update),
+ G_CALLBACK (gimp_double_adjustment_update),
&mapvals.maxdepth);
spinbutton = gimp_spin_button_new (&adj, mapvals.pixeltreshold,
@@ -1363,7 +1364,16 @@ main_dialog (GimpDrawable *drawable)
G_CALLBACK (zoomed_callback),
NULL);
- toggle = gtk_check_button_new_with_mnemonic (_("Update previe_w live"));
+ toggle = gtk_check_button_new_with_mnemonic (_("Show _wireframe"));
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), mapvals.showgrid);
+ gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+ gtk_widget_show (toggle);
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (toggle_update),
+ &mapvals.showgrid);
+
+ toggle = gtk_check_button_new_with_mnemonic (_("Update preview _live"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), mapvals.livepreview);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
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