Added method to set column width to QTreeWidget (#523)

* Fixed slight error in dependencies installation command (Ubuntu)

* Implemented setColumnWidth method for QTreeWidget

* Added an example of using setColumnWidth method

* Fixed doc error for setColumnWidth method.

src/cpp/include/nodegui/QtWidgets/QTreeWidget/qtreewidget_wrap.h

@@ -31,6 +31,7 @@ class DLL_EXPORT QTreeWidgetWrap : public Napi::ObjectWrap<QTreeWidgetWrap> {
   Napi::Value insertTopLevelItems(const Napi::CallbackInfo &info);
   Napi::Value selectedItems(const Napi::CallbackInfo &info);
   Napi::Value setColumnCount(const Napi::CallbackInfo &info);
+  Napi::Value setColumnWidth(const Napi::CallbackInfo &info);
   Napi::Value setHeaderLabel(const Napi::CallbackInfo &info);
   Napi::Value setHeaderLabels(const Napi::CallbackInfo &info);
   Napi::Value setItemWidget(const Napi::CallbackInfo &info);

src/cpp/lib/QtWidgets/QTreeWidget/qtreewidget_wrap.cpp

@@ -15,12 +15,11 @@ Napi::Object QTreeWidgetWrap::init(Napi::Env env, Napi::Object exports) {
       env, CLASSNAME,
       {InstanceMethod("addTopLevelItem", &QTreeWidgetWrap::addTopLevelItem),
        InstanceMethod("addTopLevelItems", &QTreeWidgetWrap::addTopLevelItems),
-       InstanceMethod("insertTopLevelItem",
-                      &QTreeWidgetWrap::insertTopLevelItem),
-       InstanceMethod("insertTopLevelItems",
-                      &QTreeWidgetWrap::insertTopLevelItems),
+       InstanceMethod("insertTopLevelItem",&QTreeWidgetWrap::insertTopLevelItem),
+       InstanceMethod("insertTopLevelItems", &QTreeWidgetWrap::insertTopLevelItems),
        InstanceMethod("selectedItems", &QTreeWidgetWrap::selectedItems),
        InstanceMethod("setColumnCount", &QTreeWidgetWrap::setColumnCount),
+       InstanceMethod("setColumnWidth", &QTreeWidgetWrap::setColumnWidth),
        InstanceMethod("setHeaderLabel", &QTreeWidgetWrap::setHeaderLabel),
        InstanceMethod("setHeaderLabels", &QTreeWidgetWrap::setHeaderLabels),
        InstanceMethod("setItemWidget", &QTreeWidgetWrap::setItemWidget),
@@ -153,6 +152,17 @@ Napi::Value QTreeWidgetWrap::setColumnCount(const Napi::CallbackInfo& info) {
   return env.Null();
 }
 
+Napi::Value QTreeWidgetWrap::setColumnWidth(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
+  Napi::HandleScope scope(env);
+
+  int columns = info[0].As<Napi::Number>().Int32Value();
+  int width = info[1].As<Napi::Number>().Int32Value();
+  this->instance->setColumnWidth(columns, width);
+
+  return env.Null();
+}
+
 Napi::Value QTreeWidgetWrap::setHeaderLabel(const Napi::CallbackInfo& info) {
   Napi::Env env = info.Env();
   Napi::HandleScope scope(env);

src/demo.ts

@@ -5,9 +5,11 @@ import { DateFormat } from './lib/QtEnums';
 const { QMainWindow, QTreeWidgetItem, QTreeWidget, QDate, ItemDataRole, QDateTime } = require('./index');
 
 const win = new QMainWindow();
+win.resize(500, 500);
 const tree = new QTreeWidget();
 tree.setSortingEnabled(true);
-tree.setHeaderLabels(['Date', 'Time']);
+tree.setHeaderLabels(['Date', 'Time', 'Test Column']);
+tree.setColumnWidth(1, 15); //Sets the size of the selected column (index, size).
 
 const dates = [
     '11/22/1973 02:55:43 AM',

src/lib/QtWidgets/QTreeWidget.ts

@@ -115,6 +115,15 @@ export class QTreeWidget extends QAbstractScrollArea<QTreeWidgetSignals> {
         this.native.setColumnCount(columnCount);
     }
 
+    /**
+     * Sets the width of column of this QTreeWidget.
+     * @param column The column index.
+     * @param width The size of the columns.
+     */
+    setColumnWidth(column: number, width: number): void {
+        this.native.setColumnWidth(column, width);
+    }
+
     /**
      * Sets the header label.
      * @param label The header label.

website/docs/development/setting-up.md

@@ -34,7 +34,7 @@ Supported versions: Ubuntu 17.10 and up
 3. Make, GCC v7, pkg-config
 4. Qt (_Optional_): Make sure you followed the setup instructions from [Qode][qode_setup]
 
-On Ubuntu: `$ sudo apt-get install pkg-config build-essentials` should install everything except Qt5.
+On Ubuntu: `$ sudo apt-get install pkg-config build-essential` should install everything except Qt5.
 
 Note: If you are using your own version of Qt make sure to