day11 coding Qt案例: 热了与冷饮

day11/qtdemo1/main.cpp

@@ -0,0 +1,11 @@
+#include "widget.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    Widget w;
+    w.show();
+    return a.exec();
+}

day11/qtdemo1/qtdemo1.pro

@@ -0,0 +1,33 @@
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++11
+
+# The following define makes your compiler emit warnings if you use
+# any Qt feature that has been marked deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+    main.cpp \
+    student.cpp \
+    teacher.cpp \
+    widget.cpp
+
+HEADERS += \
+    student.h \
+    teacher.h \
+    widget.h
+
+TARGET = moneyorno
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

day11/qtdemo1/student.cpp

@@ -0,0 +1,11 @@
+#include "student.h"
+
+Student::Student(QWidget *parent) : QWidget(parent)
+{
+
+}
+
+void Student::drink()
+{
+    qDebug() << "请老师吃冷饮" << endl;
+}

day11/qtdemo1/student.h

@@ -0,0 +1,20 @@
+#ifndef STUDENT_H
+#define STUDENT_H
+
+#include <QWidget>
+#include <QDebug>
+
+class Student : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit Student(QWidget *parent = nullptr);
+
+public slots:
+    void drink();
+
+signals:
+
+};
+
+#endif // STUDENT_H

day11/qtdemo1/teacher.cpp

@@ -0,0 +1,6 @@
+#include "teacher.h"
+
+Teacher::Teacher(QWidget *parent) : QWidget(parent)
+{
+
+}

day11/qtdemo1/teacher.h

@@ -0,0 +1,17 @@
+#ifndef TEACHER_H
+#define TEACHER_H
+
+#include <QWidget>
+
+class Teacher : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit Teacher(QWidget *parent = nullptr);
+
+signals:
+    void hot();
+
+};
+
+#endif // TEACHER_H

day11/qtdemo1/widget.cpp

@@ -0,0 +1,69 @@
+#include "widget.h"
+
+Widget::Widget(QWidget *parent)
+    : QWidget(parent)
+{
+    resize(500,300);
+    setWindowTitle("热了与冷饮");
+    n=0;
+
+    btn = new QPushButton("热了",this);
+    btn->setFixedSize(100,50);
+    btn->move(100,100);
+
+    btn2 = new QPushButton("没钱了",this);
+    btn2->setFixedSize(100,50);
+    btn2->move(100,200);
+
+    lable1 = new QLabel("显示",this);
+    lable1->setFixedSize(200,50);
+    lable1->move(250,100);
+
+    lable2 = new QLabel("请客次数: ",this);
+    lable2->setFixedSize(200,50);
+    lable2->move(250,200);
+
+
+
+
+    t1 = new Teacher();
+    s1 = new Student();
+
+    connect(t1,&Teacher::hot,s1,&Student::drink);
+    connect(btn,&QPushButton::clicked,this,&Widget::handleHot);
+    connect(btn2,&QPushButton::clicked,this,&Widget::noMoney);
+
+
+    emit t1->hot();
+}
+
+void Widget::handleHot()
+{
+    emit t1->hot();
+    Widget::print();
+}
+
+void Widget::print()
+{
+
+    n++;
+    if(n>0){
+        if(n%2==0)
+            lable1->setText("请老师吃巧乐兹");
+        else
+            lable1->setText("请老师吃老冰棍");
+        lable2->setText("请客次数: "+QString::number(n));
+    }
+}
+
+void Widget::noMoney()
+{
+    n=0;
+    lable1->setText("请老师喝西北风");
+    lable2->setText("请客次数: "+QString::number(n));
+}
+
+Widget::~Widget()
+{
+}
+

day11/qtdemo1/widget.h

@@ -0,0 +1,32 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include <QWidget>
+#include <QPushButton>
+#include <QLabel>
+#include "teacher.h"
+#include "student.h"
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+
+private:
+    Teacher *t1;
+    Student *s1;
+    int n;
+
+private:
+    QPushButton *btn,*btn2;
+    QLabel *lable1,*lable2;
+
+public slots:
+    void handleHot();
+    void print();
+    void noMoney();
+
+public:
+    Widget(QWidget *parent = nullptr);
+    ~Widget();
+};
+#endif // WIDGET_H