Made a vertex selection keymap for weight paint so that the

'A' key could override pose mode's select all (like face mask)
Minor note, changed the icon to the vertex selection icon, but it still doesn't force face mask to turn off.

Clipping is still not functional in wp.
And I'll need to hear how the backbuffer select is supposed to work for lasso select since the selection is arbitrary.

source/blender/editors/sculpt_paint/paint_ops.c

@@ -611,7 +611,13 @@ void ED_keymap_paint(wmKeyConfig *keyconf)
 	WM_keymap_verify_item(keymap, "PAINT_OT_weight_from_bones", WKEY, KM_PRESS, 0, 0);
 
 	// Jason
-	WM_keymap_add_item(keymap, "PAINT_OT_vert_select_all", QKEY, KM_PRESS, 0, 0);
+	/*Weight paint's Vertex Selection Mode */
+	keymap= WM_keymap_find(keyconf, "Weight Paint Vertex Selection", 0, 0);
+	keymap->poll= vert_paint_poll;
+	WM_keymap_add_item(keymap, "PAINT_OT_vert_select_all", AKEY, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "VIEW3D_OT_select_border", BKEY, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "VIEW3D_OT_select_lasso", EVT_TWEAK_A, KM_ANY, KM_CTRL, 0);
+	RNA_boolean_set(WM_keymap_add_item(keymap, "VIEW3D_OT_select_lasso", EVT_TWEAK_A, KM_ANY, KM_SHIFT|KM_CTRL, 0)->ptr, "deselect", 1);
 	WM_keymap_add_item(keymap, "VIEW3D_OT_select_circle", CKEY, KM_PRESS, 0, 0);
 
 	/* Image/Texture Paint mode */

source/blender/editors/space_view3d/space_view3d.c

@@ -371,6 +371,10 @@ static void view3d_main_area_init(wmWindowManager *wm, ARegion *ar)
 	keymap= WM_keymap_find(wm->defaultconf, "Face Mask", 0, 0);
 	WM_event_add_keymap_handler(&ar->handlers, keymap);
 	
+	/* Jason */
+	keymap= WM_keymap_find(wm->defaultconf, "Weight Paint Vertex Selection", 0, 0);
+	WM_event_add_keymap_handler(&ar->handlers, keymap);
+
 	/* pose is not modal, operator poll checks for this */
 	keymap= WM_keymap_find(wm->defaultconf, "Pose", 0, 0);
 	WM_event_add_keymap_handler(&ar->handlers, keymap);

source/blender/editors/space_view3d/view3d_header.c

@@ -495,10 +495,13 @@ void uiTemplateHeader3D(uiLayout *layout, struct bContext *C)
 		/* Manipulators aren't used in weight paint mode */
 		
 		PointerRNA meshptr;
-
 		RNA_pointer_create(&ob->id, &RNA_Mesh, ob->data, &meshptr);
-		uiItemR(layout, &meshptr, "use_paint_mask", UI_ITEM_R_ICON_ONLY, "", ICON_NONE);
-		uiItemR(layout, &meshptr, "wp_vert_sel", UI_ITEM_R_ICON_ONLY, "", ICON_NONE);// Jason
+		//uiItemR(layout, &meshptr, "use_paint_mask", UI_ITEM_R_ICON_ONLY, "", ICON_NONE);
+		// Jason
+		row= uiLayoutRow(layout, 1);
+		// TODO: make it so at most one can be active.
+		uiItemR(row, &meshptr, "use_paint_mask", UI_ITEM_R_ICON_ONLY, "", ICON_NONE);
+		uiItemR(row, &meshptr, "wp_vert_sel", UI_ITEM_R_ICON_ONLY, "", ICON_NONE);
 	} else {
 		const char *str_menu;
 

source/blender/editors/space_view3d/view3d_select.c

@@ -742,7 +742,30 @@ static void do_lasso_select_meta(ViewContext *vc, int mcords[][2], short moves,
 		}
 	}
 }
+/* Jason */
+static void do_lasso_select_paintvert(ViewContext *vc, int mcords[][2], short moves, short extend, short select)
+{
+	Object *ob= vc->obact;
+	Mesh *me= ob?ob->data:NULL;
+	rcti rect;
 
+	if(me==NULL || me->totvert==0)
+		return;
+
+	if(extend==0 && select)
+		paintvert_deselect_all_visible(ob, SEL_DESELECT, FALSE); /* flush selection at the end */
+
+	em_vertoffs= me->totvert+1;	/* max index array */
+
+	lasso_select_boundbox(&rect, mcords, moves);
+	EM_mask_init_backbuf_border(vc, mcords, moves, rect.xmin, rect.ymin, rect.xmax, rect.ymax);
+	
+	EM_backbuf_checkAndSelectTVerts(me, select);
+
+	EM_free_backbuf();
+
+	paintface_flush_flags(ob);
+}
 static void do_lasso_select_paintface(ViewContext *vc, int mcords[][2], short moves, short extend, short select)
 {
 	Object *ob= vc->obact;
@@ -805,6 +828,8 @@ static void view3d_lasso_select(bContext *C, ViewContext *vc, int mcords[][2], s
 	if(vc->obedit==NULL) { /* Object Mode */
 		if(paint_facesel_test(ob))
 			do_lasso_select_paintface(vc, mcords, moves, extend, select);
+		else if(paint_vertsel_test(ob))
+			do_lasso_select_paintvert(vc, mcords, moves, extend, select);
 		else if(ob && ob->mode & (OB_MODE_VERTEX_PAINT|OB_MODE_WEIGHT_PAINT|OB_MODE_TEXTURE_PAINT))
 			;
 		else if(ob && ob->mode & OB_MODE_PARTICLE_EDIT)

source/blender/makesrna/intern/rna_mesh.c

@@ -2077,10 +2077,11 @@ static void rna_def_mesh(BlenderRNA *brna)
 	RNA_def_property_ui_icon(prop, ICON_FACESEL_HLT, 0);
 	RNA_def_property_update(prop, 0, "rna_Mesh_update_draw");
 
+	/* Jason */
 	prop= RNA_def_property(srna, "wp_vert_sel", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "editflag", ME_EDIT_VERT_SEL);
 	RNA_def_property_ui_text(prop, "Vertex Selection", "Vertex Selection for auto brushes");
-	RNA_def_property_ui_icon(prop, ICON_FACESEL_HLT, 0);
+	RNA_def_property_ui_icon(prop, ICON_VERTEXSEL, 0);
 	RNA_def_property_update(prop, 0, "rna_Mesh_update_draw");
 
 	/* readonly editmesh info - use for extrude menu */