[Added New Feature]: New menu option 'Enable infix wire' is now accessible through the 'Options' menu. This option is turned-off by default and can be enabled anytime through the menu or the 'xschemrc' file to make xschem-editor revert back to it's old behavior, prior to commit 96c3dde250

src/callback.c

@@ -2611,13 +2611,17 @@ int rstate; /* (reduced state, without ShiftMask) */
    {
      int prev_state = xctx->ui_state;
      if(xctx->semaphore >= 2) break;
-     if(prev_state == STARTWIRE) {
+     if(tclgetboolvar("infix_wire")) {
        start_wire(xctx->mousex_snap, xctx->mousey_snap);
-       tcleval("set constr_mv 0" );
-       xctx->constr_mv=0;
-     } else{
+     } else if(prev_state == STARTWIRE) {
+       start_wire(xctx->mousex_snap, xctx->mousey_snap);
+     } else {
        tcleval("xschem wire");
      }
+     if(prev_state == STARTWIRE) {
+       tcleval("set constr_mv 0");
+       xctx->constr_mv = 0;
+     }
      break;
    }
    if(key == XK_Return && (state == 0 ) && xctx->ui_state & STARTPOLYGON) { /* close polygon */

src/xschem.tcl

@@ -7478,7 +7478,7 @@ set tctx::global_list {
   PDK_ROOT PDK SKYWATER_MODELS SKYWATER_STDCELLS 
   INITIALINSTDIR INITIALLOADDIR INITIALPROPDIR INITIALTEXTDIR XSCHEM_LIBRARY_PATH
   add_all_windows_drives auto_hilight auto_hilight_graph_nodes autofocus_mainwindow
-  autotrim_wires bespice_listen_port big_grid_points bus_replacement_char cadgrid cadlayers
+  autotrim_wires infix_wire bespice_listen_port big_grid_points bus_replacement_char cadgrid cadlayers
   cadsnap cairo_font_name cairo_font_scale change_lw color_ps tctx::colors compare_sch constr_mv
   copy_cell crosshair_layer custom_label_prefix custom_token dark_colors dark_colorscheme
   dark_gui_colorscheme delay_flag  dim_bg dim_value disable_unique_names
@@ -7899,7 +7899,7 @@ proc build_widgets { {topwin {} } } {
   global netlist_show flat_netlist split_files compare_sch intuitive_interface
   global draw_grid big_grid_points sym_txt change_lw incr_hilight symbol_width
   global cadsnap cadgrid draw_window toolbar_visible hide_symbols undo_type
-  global disable_unique_names persistent_command autotrim_wires en_hilight_conn_inst
+  global disable_unique_names persistent_command autotrim_wires infix_wire en_hilight_conn_inst
   global local_netlist_dir editor netlist_type netlist_dir spiceprefix initial_geometry
   if { $dark_gui_colorscheme} {
     set selectcolor white
@@ -8022,6 +8022,8 @@ proc build_widgets { {topwin {} } } {
      -onvalue disk -offvalue memory -command {switch_undo}
   $topwin.menubar.option add checkbutton -label "Enable stretch" -variable enable_stretch \
      -selectcolor $selectcolor  -accelerator Y 
+  $topwin.menubar.option add checkbutton -label "Enable infix-wire" -variable infix_wire \
+     -selectcolor $selectcolor
   $topwin.menubar.option add checkbutton -label "Unsel. partial sel. wires after stretch move" \
      -selectcolor $selectcolor -variable unselect_partial_sel_wires
 
@@ -8938,6 +8940,7 @@ set_ne draw_grid_axes 1
 set_ne persistent_command 0
 set_ne intuitive_interface 1
 set_ne autotrim_wires 0
+set_ne infix_wire 0
 set_ne compare_sch 0
 set_ne disable_unique_names 0
 set_ne sym_txt 1

src/xschemrc

@@ -221,6 +221,11 @@
 #### if not set show selected items at end of drag. Default: enabled (1)
 # set incremental_select 0
 
+#### if set to 1, pressing 'w' will immediately place a wire at current cursor
+#### position without waiting for Button1 (LMB) click. Can be disabled via menu
+#### default: 0
+# set infix_wire 1
+
 #### if set to 1 automatically join/trim wires while editing
 #### this may slow down on rally big designs. Can be disabled via menu 
 #### default: 0