Added setFlat for QPushButton widget

demo.ts

@@ -27,6 +27,7 @@ lineEdit.setObjectName("editable");
 const button = new QPushButton();
 button.setText("Push Push Push!");
 button.setObjectName("btn");
+button.setFlat(true);
 
 const progressbar = new QProgressBar();
 progressbar.setValue(6);

src/cpp/QtWidgets/QPushButton/qpushbutton_wrap.cpp

@@ -9,6 +9,7 @@ Napi::Object QPushButtonWrap::init(Napi::Env env, Napi::Object exports) {
   char CLASSNAME[] = "QPushButton";
   Napi::Function func = DefineClass(env, CLASSNAME, {
     InstanceMethod("setText", &QPushButtonWrap::setText),
+    InstanceMethod("setFlat", &QPushButtonWrap::setFlat),
     QWIDGET_WRAPPED_METHODS_EXPORT_DEFINE(QPushButtonWrap)
   });
   constructor = Napi::Persistent(func);
@@ -52,4 +53,14 @@ Napi::Value QPushButtonWrap::setText(const Napi::CallbackInfo& info) {
   return env.Null();
 }
 
+
+Napi::Value QPushButtonWrap::setFlat(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
+  Napi::HandleScope scope(env);
+
+  Napi::Boolean isFlat = info[0].As<Napi::Boolean>();
+  this->instance->setFlat(isFlat.Value()); 
+  return env.Null();
+}
+
  

src/cpp/QtWidgets/QPushButton/qpushbutton_wrap.h

@@ -18,6 +18,7 @@ class QPushButtonWrap : public  Napi::ObjectWrap<QPushButtonWrap> {
   static Napi::FunctionReference constructor;
   //wrapped methods
   Napi::Value setText(const Napi::CallbackInfo& info);
+  Napi::Value setFlat(const Napi::CallbackInfo& info);
   
   QWIDGET_WRAPPED_METHODS_DECLARATION
 };

src/lib/QtWidgets/QPushButton/index.ts

@@ -25,9 +25,14 @@ export class QPushButton extends NodeWidget {
     this.native = native;
     // bind member functions
     this.setText.bind(this);
+    this.setFlat.bind(this);
   }
 
   setText(text: string | number) {
     this.native.setText(`${text}`);
   }
+
+  setFlat(isFlat: boolean) {
+    this.native.setFlat(isFlat);
+  }
 }