Merge pull request #90 from soonoo/QPlainTextEdit-placeholder

add setPlaceholderText for QPlainTextEdit

docs/api/QPlainTextEdit.md

@@ -28,6 +28,10 @@ QPlainTextEdit can access all the static methods defined in [NodeWidget](api/Nod
 
 QPlainTextEdit can access all the instance properties defined in [NodeWidget](api/NodeWidget.md).
 
+#### `plainTextEdit.placeholderText`
+
+The placeholder text set on the plainTextEdit.
+
 ### Instance Methods
 
 QPlainTextEdit can access all the instance methods defined in [NodeWidget](api/NodeWidget.md).
@@ -38,6 +42,12 @@ Sets the given text to the plainTextEdit. It calls the native method [QPlainText
 
 - `text` string
 
+#### `plainTextEdit.setPlaceholderText(text)`
+
+Sets the given text to the plainTextEdit's placeholder.
+
+- `text` string
+
 #### `plainTextEdit.toPlainText()`
 
 Returns the text of the text edit as plain text. [QPlainTextEdit: toPlainText](https://doc.qt.io/qt-5/qplaintextedit.html#toPlainText).

src/cpp/QtWidgets/QPlainTextEdit/qplaintextedit_wrap.cpp

@@ -12,6 +12,7 @@ Napi::Object QPlainTextEditWrap::init(Napi::Env env, Napi::Object exports) {
   char CLASSNAME[] = "QPlainTextEdit";
   Napi::Function func = DefineClass(env, CLASSNAME, {
     InstanceMethod("setPlainText",&QPlainTextEditWrap::setPlainText),
+    InstanceMethod("setPlaceholderText",&QPlainTextEditWrap::setPlaceholderText),
     InstanceMethod("toPlainText",&QPlainTextEditWrap::toPlainText),
     InstanceMethod("setReadOnly", &QPlainTextEditWrap::setReadOnly),
     InstanceMethod("clear", &QPlainTextEditWrap::clear),
@@ -60,6 +61,14 @@ Napi::Value QPlainTextEditWrap::setPlainText(const Napi::CallbackInfo& info){
   return env.Null();
 }
 
+Napi::Value QPlainTextEditWrap::setPlaceholderText(const Napi::CallbackInfo& info){
+  Napi::Env env = info.Env();
+  Napi::HandleScope scope(env);
+  Napi::String text = info[0].As<Napi::String>();
+  this->instance->setPlaceholderText(text.Utf8Value().c_str());
+  return env.Null();
+}
+
 Napi::Value QPlainTextEditWrap::setReadOnly(const Napi::CallbackInfo &info)
 {
   Napi::Env env = info.Env();
@@ -110,4 +119,4 @@ Napi::Value QPlainTextEditWrap::lineWrapMode(const Napi::CallbackInfo &info){
   Napi::HandleScope scope(env);
   int value = static_cast<int>(this->instance->lineWrapMode());
   return Napi::Number::From(env, value);
-}
+}

src/cpp/QtWidgets/QPlainTextEdit/qplaintextedit_wrap.h

@@ -20,6 +20,7 @@ class QPlainTextEditWrap : public  Napi::ObjectWrap<QPlainTextEditWrap>{
 
   QABSTRACTSCROLLAREA_WRAPPED_METHODS_DECLARATION
   Napi::Value setPlainText(const Napi::CallbackInfo& info);
+  Napi::Value setPlaceholderText(const Napi::CallbackInfo& info);
   Napi::Value toPlainText(const Napi::CallbackInfo &info);
   Napi::Value setReadOnly(const Napi::CallbackInfo &info);
   Napi::Value clear(const Napi::CallbackInfo &info);

src/lib/QtWidgets/QPlainTextEdit/index.ts

@@ -23,6 +23,7 @@ export enum LineWrapMode {
 }
 export class QPlainTextEdit extends QAbstractScrollArea {
   native: NativeElement;
+  placeholderText?: string;
   constructor(parent?: NodeWidget) {
     let native;
     if (parent) {
@@ -35,6 +36,7 @@ export class QPlainTextEdit extends QAbstractScrollArea {
     this.parent = parent;
     // bind member functions
     this.setPlainText.bind(this);
+    this.setPlaceholderText.bind(this);
     this.toPlainText.bind(this);
     this.setReadOnly.bind(this);
     this.clear.bind(this);
@@ -47,6 +49,10 @@ export class QPlainTextEdit extends QAbstractScrollArea {
     // react:✓
     this.native.setPlainText(`${text}`);
   }
+  setPlaceholderText(text: string) {
+    this.placeholderText = text;
+    this.native.setPlaceholderText(text);
+  }
   toPlainText(): string {
     // react:✓
     return this.native.toPlainText();