(svn r27451) -Feature[FS#6241]: Move sprite 8 positions in sprite aligner with ctrl+click. (based on work by juzza1)

src/lang/english.txt

@@ -2874,7 +2874,7 @@ STR_SPRITE_ALIGNER_GOTO_TOOLTIP                                 :{BLACK}Go to th
 STR_SPRITE_ALIGNER_PREVIOUS_BUTTON                              :{BLACK}Previous sprite
 STR_SPRITE_ALIGNER_PREVIOUS_TOOLTIP                             :{BLACK}Proceed to the previous normal sprite, skipping any pseudo/recolour/font sprites and wrapping around from the first sprite to the last
 STR_SPRITE_ALIGNER_SPRITE_TOOLTIP                               :{BLACK}Representation of the currently selected sprite. The alignment is ignored when drawing this sprite
-STR_SPRITE_ALIGNER_MOVE_TOOLTIP                                 :{BLACK}Move the sprite around, changing the X and Y offsets
+STR_SPRITE_ALIGNER_MOVE_TOOLTIP                                 :{BLACK}Move the sprite around, changing the X and Y offsets. Ctrl+Click to move the sprite eight units at a time
 STR_SPRITE_ALIGNER_RESET_BUTTON                                 :{BLACK}Reset relative
 STR_SPRITE_ALIGNER_RESET_TOOLTIP                                :{BLACK}Reset the current relative offsets
 STR_SPRITE_ALIGNER_OFFSETS_ABS                                  :{BLACK}X offset: {NUM}, Y offset: {NUM} (Absolute)

src/newgrf_debug_gui.cpp

@@ -972,10 +972,11 @@ struct SpriteAlignerWindow : Window {
 					this->offs_start_map.Insert(this->current_sprite, XyOffs(spr->x_offs, spr->y_offs));
 				}
 				switch (widget) {
-					case WID_SA_UP:    spr->y_offs--; break;
-					case WID_SA_DOWN:  spr->y_offs++; break;
-					case WID_SA_LEFT:  spr->x_offs--; break;
-					case WID_SA_RIGHT: spr->x_offs++; break;
+					/* Move ten units at a time if ctrl is pressed. */
+					case WID_SA_UP:    spr->y_offs -= _ctrl_pressed ? 8 : 1; break;
+					case WID_SA_DOWN:  spr->y_offs += _ctrl_pressed ? 8 : 1; break;
+					case WID_SA_LEFT:  spr->x_offs -= _ctrl_pressed ? 8 : 1; break;
+					case WID_SA_RIGHT: spr->x_offs += _ctrl_pressed ? 8 : 1; break;
 				}
 				/* Of course, we need to redraw the sprite, but where is it used?
 				 * Everywhere is a safe bet. */