Added a -historywidth attribute to control de width of

the past positions. It used to be derived from the track
symbol size preventing the use of very big icons.

1 files changed, 11 insertions, 5 deletions

diff --git a/generic/Track.c b/generic/Track.c
index 47b80a0..b079f63 100644
--- a/generic/Track.c
+++ b/generic/Track.c
@@ -132,6 +132,7 @@ typedef struct _TrackItemStruct {
   ZnPoint	speed_vector;		/* s. v. slope in world coord	*/
   ZnDim		speed_vector_width;
   ZnGradient	*history_color;
+  ZnDim		history_width;
 
   /* Private data */
   ZnFieldSetStruct field_set;
@@ -175,6 +176,8 @@ static ZnAttrConfig	track_attrs[] = {
     Tk_Offset(TrackItemStruct, flags), FROZEN_LABEL_BIT, ZN_COORDS_FLAG, False },
   { ZN_CONFIG_GRADIENT, "-historycolor", NULL,
     Tk_Offset(TrackItemStruct, history_color), 0, ZN_DRAW_FLAG, False },
+  { ZN_CONFIG_DIM, "-historywidth", NULL,
+    Tk_Offset(TrackItemStruct, history_width), 0, ZN_COORDS_FLAG, False },
   { ZN_CONFIG_ANCHOR, "-labelanchor", NULL,
     Tk_Offset(TrackItemStruct, label_anchor), 0, ZN_COORDS_FLAG, False },
   { ZN_CONFIG_ANGLE, "-labelangle", NULL,
@@ -410,6 +413,7 @@ Init(ZnItem		item,
   track->marker_fill_pattern = ZnUnspecifiedImage;
   track->speed_vector_color = ZnGetGradientByValue(wi->fore_color);
   track->history_color = ZnGetGradientByValue(wi->fore_color);
+	track->history_width = 8;
   CLEAR(track->flags, MARKER_FILLED_BIT);
   SET(track->flags, FILLED_HISTORY_BIT);
   CLEAR(track->flags, DOT_MIXED_HISTORY_BIT);
@@ -752,15 +756,17 @@ ComputeCoordinates(ZnItem	item,
 			    wi->track_visible_history_size : 0);
 
     ZnResetBBox(&bbox);
+		w = track->history_width;
+		w2 = (w+1)/2;
     num_acc_pos = ZnListSize(track->history);
     hist = ZnListArray(track->history);
     for (i = 0; i < num_acc_pos; i++) {
       ZnTransformPoint(wi->current_transfo, &hist[i].world, &hist[i].dev);
       if ((i < visible_history_size) && (hist[i].visible)) {
 	bbox.orig.x = hist[i].dev.x - w2;
-	bbox.orig.y = hist[i].dev.y - h2;
+	bbox.orig.y = hist[i].dev.y - w2;
 	bbox.corner.x = bbox.orig.x + w;
-	bbox.corner.y = bbox.orig.y + h;
+	bbox.corner.y = bbox.orig.y + w;
 	ZnAddBBoxToBBox(&item->item_bounding_box, &bbox);
       }
     }
@@ -871,7 +877,7 @@ ComputeCoordinates(ZnItem	item,
     field_set->label_pos.y = ZnNearestInt(field_set->label_pos.y);
 
     /*
-     * Need to compensate for GL thicke lines
+     * Need to compensate for GL thick lines
      */
 #ifdef GL
 #define CORR 1
@@ -1227,7 +1233,7 @@ Draw(ZnItem	item)
     }
     num_acc_pos = MIN(visible_history_size, ZnListSize(track->history));
     hist = ZnListArray(track->history);
-    side_size = MAX(width, height);
+    side_size = track->history_width;
 
     for (i = 0, nb_hist = 0; i < num_acc_pos; i++) {
       if (ISSET(track->flags, LAST_AS_FIRST_BIT) &&
@@ -1498,7 +1504,7 @@ Render(ZnItem	item)
     glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
     num_acc_pos = MIN(visible_history_size, ZnListSize(track->history));
     hist = ZnListArray(track->history);
-    side_size = MAX(width, height);
+    side_size = track->history_width;
     /*
      * Turning off line and point smoothing
      * to enhance ;-) history drawing.