Add WindowShowHide example

Author: gammasoft71

Qt.Widgets/Others/CMakeLists.txt

@@ -8,3 +8,4 @@ add_subdirectory(InputDialogMultiline)
 add_subdirectory(InputDialogPassword)
 add_subdirectory(LCDNumber2)
 add_subdirectory(Wiggly)
+add_subdirectory(WindowShowHide)

Qt.Widgets/Others/Others.pro

@@ -4,4 +4,5 @@ SUBDIRS = \
     InputDialogMultiline \
     InputDialogPassword \
     LCDNumber2 \
-    Wiggly
+    Wiggly \
+    WindowShowHide

Qt.Widgets/Others/README.md

@@ -2,11 +2,12 @@
 
 [This folder](.) contains others examples.
 
-* [ButtonWithStyleSheet](ButtonWithStyleSheet/README.md) show how to use stylesheet with QPushButton.
-* [InputDialogMultiline](InputDialogMultiline/README.md) show how to use multiline input dialog with QInputDialog.
-* [InputDialogPassword](InputDialogPassword/README.md) show how to use password input dialog with QInputDialog.
+* [ButtonWithStyleSheet](ButtonWithStyleSheet/README.md) shows how to use stylesheet with QPushButton.
+* [InputDialogMultiline](InputDialogMultiline/README.md) shows how to use multiline input dialog with QInputDialog.
+* [InputDialogPassword](InputDialogPassword/README.md) shows how to use password input dialog with QInputDialog.
 * [LCDNumber2](LCDNumber2/README.md) shows how to create a LCD number with QLCDNumber.
 * [Wiggly](Wiggly/README.md) shows how to animate a user control using QBasicTimer and timerEvent(). In addition, the example demonstrates how to use QFontMetrics to determine the size of text on screen.
+* [WindowShowHide](WindowShowHide/README.md) demonstrates the use of QMainWindow show, hide and close methods.
 
 ## Generate and build
 

Qt.Widgets/Others/WindowShowHide/CMakeLists.txt

@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 3.20)
+
+project(WindowShowHide)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(Qt6 REQUIRED COMPONENTS Core Widgets)
+if (Qt6_FOUND)
+  qt_standard_project_setup()
+else ()
+  find_package(Qt5 REQUIRED COMPONENTS Core Widgets)
+  set(CMAKE_AUTOMOC ON)
+  set(CMAKE_AUTORCC ON)
+  set(CMAKE_AUTOUIC ON)
+endif ()
+
+add_executable(${PROJECT_NAME} WIN32 MACOSX_BUNDLE src/WindowShowHide.cpp src/WindowShowHide.h)
+target_link_libraries(${PROJECT_NAME} Qt::Core Qt::Widgets)
+set_target_properties(${PROJECT_NAME} PROPERTIES FOLDER "Qt.Widgets/Others")

Qt.Widgets/Others/WindowShowHide/README.md

@@ -0,0 +1,64 @@
+# WindowShowHide
+
+Demonstrates the use of QMainWindow show, hide and close methods.
+
+## Sources
+
+[src/WindowShowHide.h](src/WindowShowHide.h)
+
+[src/WindowShowHide.cpp](src/WindowShowHide.cpp)
+
+[CMakeLists.txt](CMakeLists.txt)
+
+## Output
+
+![Screenshot](../../../docs/Pictures/WindowShowHide.png)
+
+## Generate and build
+
+### Qt Creator
+
+To build these projects, open `WindowShowHide.pro` file with Qt Creator.
+
+### CMake
+
+To build this project, open "Terminal" and type following lines:
+
+Set `CMAKE_PREFIX_PATH` with Qt6 install path.
+
+#### Windows :
+
+``` cmake
+mkdir build
+cd build
+cmake ..
+start ./WindowShowHide.sln
+```
+
+#### macOS :
+
+``` cmake
+mkdir build
+cd build
+cmake .. -G "Xcode"
+open ./WindowShowHide.xcodeproj
+```
+
+#### Linux with Code::Blocks :
+
+``` cmake
+mkdir build
+cd build
+cmake .. -G "CodeBlocks - Unix Makefiles"
+xdg-open ./WindowShowHide.cbp > /dev/null 2>&1
+```
+
+#### Linux :
+
+``` cmake
+mkdir build
+cd build
+cmake .. 
+cmake --build . --config Debug
+./WindowShowHide
+```

Qt.Widgets/Others/WindowShowHide/WindowShowHide.pro

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

Qt.Widgets/Others/WindowShowHide/src/WindowShowHide.cpp

@@ -0,0 +1,10 @@
+#include "WindowShowHide.h"
+
+using namespace Examples;
+
+int main(int argc, char *argv[]) {
+  auto application = QApplication {argc, argv};
+  auto window1 = Window1 {};
+  window1.show();
+  return application.exec();
+}

Qt.Widgets/Others/WindowShowHide/src/WindowShowHide.h

@@ -0,0 +1,64 @@
+#pragma once
+#include <QApplication>
+#include <QCloseEvent>
+#include <QCheckBox>
+#include <QFrame>
+#include <QMainWindow>
+#include <QPushButton>
+
+namespace Examples {
+  class Window2 : public QMainWindow {
+    Q_OBJECT
+  signals:
+    bool windowClosing();
+    void windowClosed();
+    
+  protected:
+    void closeEvent(QCloseEvent* event) override {
+      event->setAccepted(emit windowClosing());
+      if (event->isAccepted()) emit windowClosed();
+    }
+  };
+  
+  class Window1 : public QMainWindow {
+    Q_OBJECT
+    ;
+  public:
+    Window1() {
+      resize(320, 325);
+      setWindowTitle("Window1 show and hide example");
+      setCentralWidget(&frame);
+      
+      window2.resize(300, 100);
+      window2.setWindowTitle("Close count = 0");
+      window2.connect(&window2, &Window2::windowClosing, [&] {return !cancelCloseCheckBox.isChecked();});
+      window2.connect(&window2, &Window2::windowClosed, [&] {window2.setWindowTitle(QString {"Close count = %1"}.arg(++closedCount));});
+      
+      closeButton.move(10, 10);
+      closeButton.resize(100, 40);
+      closeButton.connect(&closeButton, &QPushButton::clicked, [&] {window2.close();});
+      
+      showButton.move(10, 60);
+      showButton.resize(100, 40);
+      showButton.connect(&showButton, &QPushButton::clicked, [&] {window2.show();});
+      
+      hideButton.move(10, 110);
+      hideButton.resize(100, 40);
+      hideButton.connect(&hideButton, &QPushButton::clicked, [&] {window2.hide();});
+      
+      cancelCloseCheckBox.move(10, 160);
+      cancelCloseCheckBox.resize(100, 40);
+    }
+    
+  private:
+    void closeEvent(QCloseEvent* event) override {QApplication::exit();}
+    
+    int closedCount = 0;
+    Window2 window2;
+    QFrame frame {this};
+    QPushButton closeButton {"Close", &frame};
+    QPushButton showButton {"Show", &frame};
+    QPushButton hideButton {"Hide", &frame};
+    QCheckBox cancelCloseCheckBox {"cancel close", &frame};
+  };
+}