- band-aid: make canvas grab focus on click and scroll, so that it's easy to

get it back when we lose it
- improved heuristics for measx/measy: instead of looking for "next" or "max"
  on secondary coordinate, pick the one that's closest. I.e., if there's a
  chance to just connect with x' = 0 or y' = 0, do it.
- mouse wheel on loop value now selects next/previous value
- corrected proximity calculation for measurements
- vec/frame/meas toggle now deselects, so that we don't accidently leave a
  supposedly hidden item selected



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5413 99fdad57-331a-0410-800a-d7fa5415bdb3

inst.c

@@ -23,6 +23,7 @@
 #include "gui_util.h"
 #include "gui_status.h"
 #include "gui_tool.h"
+#include "gui_meas.h"
 #include "gui_inst.h"
 #include "gui.h"
 #include "inst.h"
@@ -37,9 +38,10 @@ struct inst_ops {
 	    unit_type scale);
 	void (*select)(struct inst *self);
 	int (*anchors)(struct inst *self, struct vec ***anchors);
+	void (*begin_drag_move)(struct inst *from, int i);
 	struct pix_buf *(*draw_move)(struct inst *inst,
 	    struct coord pos, int i);
-	/* arcs need this special override */
+	/* arcs and measurements need this special override */
 	void (*do_move_to)(struct inst *inst, struct vec *vec, int i);
 };
 
@@ -689,6 +691,7 @@ static struct inst_ops meas_ops = {
 	.distance	= gui_dist_meas,
 	.select		= meas_op_select,
 	.anchors	= meas_op_anchors,
+	.begin_drag_move= begin_drag_move_meas,
 	.draw_move	= draw_move_meas,
 };
 
@@ -925,6 +928,13 @@ struct pix_buf *inst_hover(struct inst *inst)
 }
 
 
+void inst_begin_drag_move(struct inst *inst, int i)
+{
+	if (inst->ops->begin_drag_move)
+		inst->ops->begin_drag_move(inst, i);
+}
+
+
 void inst_delete(struct inst *inst)
 {
 	if (inst->ops == &vec_ops)