add TreeWidget example

Author: gammasoft71

Qt.Widgets/CommonControls/CMakeLists.txt

@@ -24,4 +24,5 @@ add_subdirectory(SpinBox)
 add_subdirectory(SpinButton)
 add_subdirectory(ToggleButton)
 add_subdirectory(TreeView)
+add_subdirectory(TreeWidget)
 add_subdirectory(Widget)

Qt.Widgets/CommonControls/CommonControls.pro

@@ -19,4 +19,5 @@ SUBDIRS = \
     SpinButton \
     ToggleButton \
     TreeView \
+    TreeWidget \
     Widget \

Qt.Widgets/CommonControls/TreeView/src/Ai16.xpm

@@ -1,15 +1,11 @@
 #pragma once
-#include <QComboBox>
 #include <QFrame>
 #include <QMainWindow>
 #include <QStandardItem>
 #include <QStandardItemModel>
 #include <QHeaderView>
 #include <QTreeView>
 #include <QVBoxLayout>
-#include "Ai16.xpm"
-#include "Avi16.xpm"
-#include "Bmp16.xpm"
 
 namespace Examples {
   class Window1 : public QMainWindow {

Qt.Widgets/CommonControls/TreeView/src/Avi16.xpm

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.1)
+
+# Project
+project(TreeWidget)
+find_package(Qt5Widgets CONFIG REQUIRED)
+
+# Options
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Application
+add_executable(TreeWidget WIN32 MACOSX_BUNDLE src/TreeWidget.cpp src/TreeWidget.h)
+target_link_libraries(TreeWidget Qt5::Widgets)

Qt.Widgets/CommonControls/TreeView/src/Bmp16.xpm

@@ -0,0 +1,4 @@
+CONFIG += c++17
+QT = widgets
+SOURCES = src/TreeWidget.cpp
+HEADERS = src/TreeWidget.h

Qt.Widgets/CommonControls/TreeView/src/TreeView.h

@@ -0,0 +1,11 @@
+#include <QApplication>
+#include "TreeWidget.h"
+
+using namespace Examples;
+
+int main(int argc, char *argv[]) {
+  QApplication application(argc, argv);
+  Window1 window1;
+  window1.show();
+  return application.exec();
+}

Qt.Widgets/CommonControls/TreeWidget/CMakeLists.txt

@@ -0,0 +1,41 @@
+#pragma once
+#include <QFrame>
+#include <QMainWindow>
+#include <QTreeWidget>
+#include <QTreeWidgetItem>
+#include <QVBoxLayout>
+
+namespace Examples {
+  class Window1 : public QMainWindow {
+    Q_OBJECT
+  public:
+    Window1() {
+      layout.addWidget(&treeWidget1);
+
+      auto rootNode = new QTreeWidgetItem({"Root"});
+      treeWidget1.addTopLevelItem(rootNode);
+      auto firstNode = new QTreeWidgetItem({"First"});
+      rootNode->addChild(firstNode);
+      firstNode->addChild(new QTreeWidgetItem({"Second"}));
+      firstNode->addChild(new QTreeWidgetItem({"Third"}));
+      auto fourthNode = new QTreeWidgetItem({"Fourth"});
+      rootNode->addChild(fourthNode);
+      fourthNode->addChild(new QTreeWidgetItem({"Fifth"}));
+      fourthNode->addChild(new QTreeWidgetItem({"Sixth"}));
+      fourthNode->addChild(new QTreeWidgetItem({"{Seventh"}));
+
+      treeWidget1.setHeaderHidden(true);
+      treeWidget1.addTopLevelItem(rootNode);
+      treeWidget1.expandAll();
+
+      setCentralWidget(&frame);
+      setWindowTitle("Tree widget example");
+      resize(300, 300);
+    }
+
+  private:
+    QFrame frame;
+    QVBoxLayout layout {&frame};
+    QTreeWidget treeWidget1;
+  };
+}

Qt.Widgets/CommonControls/TreeWidget/TreeWidget.pro

@@ -61,6 +61,8 @@ shows how to use Qt widgets only by programming code (c++17).
 
 [TreeView](Qt.Widgets/CommonControls/TreeView) shows how to create a three view with QTreeView.
 
+[TreeWidget](Qt.Widgets/CommonControls/TreeWidget) shows how to create a three widget with QTreeWidget.
+
 [Widget](Qt.Widgets/CommonControls/ToggleButton) shows how to create a widget with QWidget.
 
 ## Containers