其他

DialogTest/widget.cpp

@@ -1,8 +1,23 @@
 #include "widget.h"
+#include <QFileDialog>
+#include <QString>
+#include <QDebug>
 
 Widget::Widget(QWidget *parent)
     : QWidget(parent)
 {
+    this->resize(600,400);
+    button = new QPushButton("选择文件",this);
+    button->resize(100,100);
+    button->move(250,100);
+
+    connect(button,&QPushButton::clicked,[](){
+//        QString str = QFileDialog::getOpenFileName();
+//        qDebug()<<str;
+        QStringList str = QFileDialog::getOpenFileNames();
+        qDebug()<<str;
+    });
+
 }
 
 Widget::~Widget()

DialogTest/widget.h

@@ -2,11 +2,15 @@
 #define WIDGET_H
 
 #include <QWidget>
+#include <QPushButton>
 
 class Widget : public QWidget
 {
     Q_OBJECT
 
+private:
+    QPushButton *button;
+
 public:
     Widget(QWidget *parent = nullptr);
     ~Widget();

EventTest/main.cpp

@@ -1,11 +1,38 @@
 #include "mainwindow.h"
 
 #include <QApplication>
+#include <QLabel>
+#include <QMouseEvent>
+
+class EventLabel : public QLabel
+{
+protected:
+    void mouseMoveEvent(QMouseEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+};
+
+void EventLabel::mouseMoveEvent(QMouseEvent *event){
+    this->setText(QString("<center><h1>Move: (%1, %2)</h1></center>").arg(QString::number(event->x()),QString::number(event->y)));
+}
+
+void EventLabel::mousePressEvent(QMouseEvent *event){
+    this->setText(QString("<center><h1>Press: (%1, %2)</h1></center>").arg(QString::number(event->x()),QString::number(event->y)));
+}
+
+void EventLabel::mouseReleaseEvent(QMouseEvent *event){
+    QString msg;
+    msg.sprintf("<center><h1>Release: (%d, %d)</h1></center>", event->x(), event->y());
+}
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
-    MainWindow w;
-    w.show();
+
+    EventLabel *label = new EventLabel;
+    label->setWindowTitle("MouseEvent Demo");
+    label->resize(300,200);
+    label->show();
+
     return a.exec();
 }

homework-day1/main.cpp

@@ -12,25 +12,26 @@
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
-    //    Widget7 w;
-    //    w.show();
-    Widget7 judge1;
-    Widget7 judge2;
-    Widget7 judge3;
+//    Widget7 w;
+//    w.show();
 
-    Widget8 w8;
+        Widget7 judge1;
+        Widget7 judge2;
+        Widget7 judge3;
 
-    judge1.show();
-    judge2.show();
-    judge3.show();
+        Widget8 w8;
 
-    // 建立信号槽连接
-    w8.connect(&judge1,&Widget7::studentSelected,&w8,&Widget8::receviceStudentSelection);
-    w8.connect(&judge2,&Widget7::studentSelected,&w8,&Widget8::receviceStudentSelection);
-    w8.connect(&judge2,&Widget7::studentSelected,&w8,&Widget8::receviceStudentSelection);
+        judge1.show();
+        judge2.show();
+        judge3.show();
+
+        // 建立信号槽连接
+        w8.connect(&judge1,&Widget7::studentSelected,&w8,&Widget8::receviceStudentSelection);
+        w8.connect(&judge2,&Widget7::studentSelected,&w8,&Widget8::receviceStudentSelection);
+        w8.connect(&judge2,&Widget7::studentSelected,&w8,&Widget8::receviceStudentSelection);
 
 
-//    w8.show();
+//        w8.show();
 
     return a.exec();
 }

homework-day1/widget5.cpp

@@ -21,6 +21,4 @@ Widget5::Widget5(QWidget *parent) : QWidget(parent)
                 this->setWindowTitle("Winget6消失了");
                 w6->close();
             });
-
-
 }

homework-day1/widget5.h

@@ -11,6 +11,7 @@ class Widget5 : public QWidget
     Q_OBJECT
 public:
     explicit Widget5(QWidget *parent = nullptr);
+    ~Widget5(){ delete w6;}
 
 private:
     Widget6 *w6; // Widget6 类对象的指针成员

homework-day1/widget7.cpp

@@ -24,37 +24,42 @@ Widget7::Widget7(QWidget *parent) : QWidget(parent)
     btn_restart = new QPushButton("重新再来",this);
     btn_restart->move(150,70);
 
-    connect(this,&Widget7::my_signal,this,&Widget7::my_handler);
-
+    //    connect(this,&Widget7::my_signal,this,&Widget7::my_handler);
+    connect(this,SIGNAL(my_signal(const QString &)),this,SLOT(my_handler(const QString &)));
 
     connect(btn1,&QPushButton::clicked,[&]{
         QString str = btn1->text();
         emit this->my_signal(str);
         emit this->studentSelected(str);
+        btn1->setEnabled(false);
     });
 
     connect(btn2,&QPushButton::clicked,[&]{
         QString str = btn2->text();
         emit this->my_signal(str);
         emit this->studentSelected(str);
+        btn2->setEnabled(false);
     });
 
     connect(btn3,&QPushButton::clicked,[&]{
         QString str = btn3->text();
         emit this->my_signal(str);
         emit this->studentSelected(str);
+        btn3->setEnabled(false);
     });
 
     connect(btn4,&QPushButton::clicked,[&]{
         QString str = btn4->text();
         emit this->my_signal(str);
         emit this->studentSelected(str);
+        btn4->setEnabled(false);
     });
 
     connect(btn5,&QPushButton::clicked,[&]{
         QString str = btn5->text();
         emit this->my_signal(str);
         emit this->studentSelected(str);
+        btn5->setEnabled(false);
     });
 
     // 打印学生
@@ -64,16 +69,24 @@ Widget7::Widget7(QWidget *parent) : QWidget(parent)
                     qDebug()<<*it;
                     it++;
                 }
+//                for(int i=0;i<vct->size();i++){
+//                    qDebug()<<vct->at(i);
+//                }
             });
 
     connect(btn_restart,&QPushButton::clicked,[&]()->void{
                 vct->clear(); // 清空容器
+                btn1->setEnabled(true); // 还原按钮可用性
+                btn2->setEnabled(true);
+                btn3->setEnabled(true);
+                btn4->setEnabled(true);
+                btn5->setEnabled(true);
             });
 }
 
 void Widget7::my_handler(const QString &str)
 {
-
     //    qDebug()<<str;
-    vct->append(str); // 向 QVector 中添加学生
+    if(vct->count(str) == 0) // 当本字符串尚未加入 vct 时，将其加入 vct
+        vct->append(str); // 向 QVector 中添加学生
 }

homework-day1/widget7.h

@@ -10,10 +10,8 @@ class Widget7 : public QWidget
     Q_OBJECT
 public:
     explicit Widget7(QWidget *parent = nullptr);
-    ~Widget7()
-    {
-        delete vct;
-    }
+    ~Widget7() { delete vct; }
+
 private:
     QVector<QString> *vct;
     QPushButton *btn1,*btn2,*btn3,*btn4,*btn5;