Expaneded menu interface for value exchange

editor/js/tools/menus/toolmenu.js

@@ -4,13 +4,66 @@ export default class ToolMenu {
     constructor(tool) {
         this.tool = tool;
         this.menuId = this.tool.getKey() + "-menu";
+        this.warnings = false;
+        this.values = {};
     }
 
     show() {
-        jQuery("#" + this.menuId).removeClass("hidden");
+        this.getMenu().removeClass("hidden");
     }
 
     hide() {
-        jQuery("#" + this.menuId).addClass("hidden");
+        this.getMenu().addClass("hidden");
+    }
+
+    beforeGet(key) {
+        if (this.warnings) {
+            console.warn('Method "beforeGet" not implemented.');
+        }
+    }
+
+    afterSet(key, value) {
+        if (this.warnings) {
+            console.warn('Method "afterSet" not implemented.');
+        }
+    }
+
+    value(key, newValue) {
+        // If key not defined
+        // (be it by giving no arguments, or giving it an undefined value)
+        // Return all values as dict.
+        if (key === undefined) {
+            return this.values;
+        }
+
+        // Is key valid?
+        // If not, create undefined entry
+        if (key in this.values == false) {
+            this.values[key] = undefined;
+        }
+
+        // If value not defined, returned specified value.
+        if (newValue === undefined) {
+            newValue = this.beforeGet(key);
+
+            if (newValue !== undefined) {
+                this.values[key] = newValue;
+            }
+
+            return this.values[key];
+        }
+        // If bot defined, store specified value.
+        else {
+            this.values[key] = newValue;
+            newValue = this.afterSet(key, newValue);
+        }
+    }
+
+    getChildren(selector) {
+        return this.getMenu().children(selector);
+    }
+
+    getMenu() {
+        return jQuery("#tool-menu #" + this.menuId);
     }
 }