LibGUI: Implement set_property() on Widget and AbstractButton

This makes it possible for an RPC client to modify some interesting
widget properties.

Libraries/LibGUI/AbstractButton.cpp

@@ -206,4 +206,26 @@ void AbstractButton::save_to(JsonObject& json)
     Widget::save_to(json);
 }
 
+bool AbstractButton::set_property(const StringView& name, const JsonValue& value)
+{
+    if (name == "text") {
+        set_text(value.to_string());
+        return true;
+    }
+    if (name == "checked") {
+        set_checked(value.to_bool());
+        return true;
+    }
+    if (name == "checkable") {
+        set_checkable(value.to_bool());
+        return true;
+    }
+    if (name == "exclusive") {
+        set_exclusive(value.to_bool());
+        return true;
+    }
+
+    return Widget::set_property(name, value);
+}
+
 }

Libraries/LibGUI/AbstractButton.h

@@ -71,6 +71,7 @@ protected:
     virtual void change_event(Event&) override;
 
     virtual void save_to(JsonObject&) override;
+    virtual bool set_property(const StringView& name, const JsonValue& value) override;
 
     void paint_text(Painter&, const Gfx::Rect&, const Gfx::Font&, Gfx::TextAlignment);
 

Libraries/LibGUI/Widget.cpp

@@ -739,6 +739,31 @@ void Widget::save_to(AK::JsonObject& json)
     Core::Object::save_to(json);
 }
 
+bool Widget::set_property(const StringView& name, const JsonValue& value)
+{
+    if (name == "fill_with_background_color") {
+        set_fill_with_background_color(value.to_bool());
+        return true;
+    }
+    if (name == "tooltip") {
+        set_tooltip(value.to_string());
+        return true;
+    }
+    if (name == "enable") {
+        set_enabled(value.to_bool());
+        return true;
+    }
+    if (name == "focused") {
+        set_focus(value.to_bool());
+        return true;
+    }
+    if (name == "visible") {
+        set_visible(value.to_bool());
+        return true;
+    }
+    return Core::Object::set_property(name, value);
+}
+
 Vector<Widget*> Widget::child_widgets() const
 {
     Vector<Widget*> widgets;

Libraries/LibGUI/Widget.h

@@ -296,6 +296,8 @@ protected:
     virtual void did_begin_inspection() override;
     virtual void did_end_inspection() override;
 
+    virtual bool set_property(const StringView& name, const JsonValue& value) override;
+
 private:
     void handle_paint_event(PaintEvent&);
     void handle_resize_event(ResizeEvent&);