Tut 9

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+
+project(TowerDefense VERSION 0.1 LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)
+
+set(PROJECT_SOURCES
+        main.cpp
+        tower.h tower.cpp
+        game.h game.cpp
+        res.qrc
+)
+
+if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
+    qt_add_executable(TowerDefense
+        MANUAL_FINALIZATION
+        ${PROJECT_SOURCES}
+    )
+# Define target properties for Android with Qt 6 as:
+#    set_property(TARGET TowerDefense APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
+#                 ${CMAKE_CURRENT_SOURCE_DIR}/android)
+# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
+else()
+    if(ANDROID)
+        add_library(TowerDefense SHARED
+            ${PROJECT_SOURCES}
+        )
+# Define properties for Android with Qt 5 after find_package() calls as:
+#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
+    else()
+        add_executable(TowerDefense
+            ${PROJECT_SOURCES}
+        )
+    endif()
+endif()
+
+target_link_libraries(TowerDefense PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
+
+set_target_properties(TowerDefense PROPERTIES
+    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
+    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
+    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
+    MACOSX_BUNDLE TRUE
+    WIN32_EXECUTABLE TRUE
+)
+
+install(TARGETS TowerDefense
+    BUNDLE DESTINATION .
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
+if(QT_VERSION_MAJOR EQUAL 6)
+    qt_finalize_executable(TowerDefense)
+endif()

game.cpp

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+#include "game.h"
+#include <QGraphicsScene>
+#include "tower.h"
+
+Game::Game() {
+    scene = new QGraphicsScene(this);
+
+    setScene(scene);
+
+    // create a tower
+    Tower *t = new Tower();
+
+    // add tower
+    scene->addItem(t);
+
+    setFixedSize(800,600);
+}

game.h

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+#ifndef GAME_H
+#define GAME_H
+
+#include <QGraphicsView>
+
+class Game : public QGraphicsView
+{
+public:
+    Game();
+    QGraphicsScene *scene;
+};
+
+#endif // GAME_H

main.cpp

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+#include "game.h"
+
+#include <QApplication>
+
+
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+
+    Game *game = new Game();
+    game->show();
+
+    return a.exec();
+}

res.qrc

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+<RCC>
+    <qresource prefix="/images">
+        <file>tower.png</file>
+    </qresource>
+</RCC>

tower.cpp

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+#include "tower.h"
+#include <QPixmap>
+#include <QVector>
+#include <QPointF>
+
+Tower::Tower(QGraphicsItem *parent) {
+    setPixmap(QPixmap(":/images/tower.png"));
+
+    // create points vectors
+    QVector<QPointF> points;
+    points << QPoint(1,0) << QPoint(2,0) << QPoint(3,1) << QPoint(3,2) << QPoint(2,3) << QPoint(1,3) << QPoint(0,2) << QPoint(0,1);
+
+    // scale points
+    int SCALE_FACTOR = 70;
+    for (size_t i = 0, n = points.size(); i <n; i++) {
+        points[i] *= SCALE_FACTOR;
+    }
+
+    // create a polygon from these points
+    QPolygonF polygon(points);
+
+    // create the QGraphicsPolygonItem
+    attack_area = new QGraphicsPolygonItem(QPolygonF(points), this);
+
+    // move the polygon
+    QPointF poly_center(1.5, 1.5);
+    poly_center *= SCALE_FACTOR;
+    poly_center = mapToScene(poly_center);
+    QPointF tower_center(x()+34, y()+64);
+    QLineF ln(poly_center, tower_center);
+    attack_area->setPos(x()+ln.dx(), y()+ln.dy());
+
+}

tower.h

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+#ifndef TOWER_H
+#define TOWER_H
+
+#include <QGraphicsPixmapItem>
+#include <QGraphicsPolygonItem>
+
+class Tower : public QGraphicsPixmapItem {
+public:
+    Tower(QGraphicsItem *parent=0);
+private:
+    QGraphicsPolygonItem *attack_area;
+};
+
+#endif // TOWER_H

widget.cpp

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+#include "widget.h"
+#include "./ui_widget.h"
+
+Widget::Widget(QWidget *parent)
+    : QWidget(parent)
+    , ui(new Ui::Widget)
+{
+    ui->setupUi(this);
+}
+
+Widget::~Widget()
+{
+    delete ui;
+}
+

widget.h

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+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class Widget; }
+QT_END_NAMESPACE
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Widget(QWidget *parent = nullptr);
+    ~Widget();
+
+private:
+    Ui::Widget *ui;
+};
+#endif // WIDGET_H

widget.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Widget</class>
+ <widget class="QWidget" name="Widget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Widget</string>
+  </property>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>