day2: homework 第二到六题

homework-day2-2/.gitignore

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+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+
+# qtcreator generated files
+*.pro.user*
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

homework-day2-2/homework-day2-2.pro

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+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 \
+    mainwindow.cpp
+
+HEADERS += \
+    mainwindow.h
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
+
+RESOURCES += \
+    res.qrc

homework-day2-2/main.cpp

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

homework-day2-2/mainwindow.cpp

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+#include "mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setWindowTitle("简单记事");
+    setFixedSize(800,600);
+    QPixmap window_icon;
+    window_icon.load(":logo");
+    setWindowIcon(QIcon(window_icon));
+
+
+    menu_bar = new QMenuBar(this); // 父组件为当前 MainWindow
+    setMenuBar(menu_bar);
+
+
+
+    menu1 = new QMenu("文件",menu_bar); // 父组件为 menu_bar
+    openAction = new QAction("打开",menu1); // 父组件为 menu1
+    saveAction = new QAction("保存",menu1);
+    exitAction = new QAction("退出",menu1);
+    openAction->setShortcut(QKeySequence(tr("ctrl+o"))); // 快捷键绑定
+    saveAction->setShortcut(QKeySequence(Qt::CTRL+Qt::Key_S));
+    exitAction->setShortcut(QKeySequence(tr("ctrl+q")));
+    connect(openAction,&QAction::triggered,[&]{ // 事件绑定
+        qDebug()<<"打开...";
+        // 打开文件
+        QString file_path = QFileDialog::getOpenFileName(this,"打开文件",".","Text(*.txt);;Markdown(*.md)");
+        QFile file(file_path);
+        if(!file.open(QIODevice::ReadOnly|QIODevice::Text)){
+            QMessageBox::critical(this,"错误","文件路径 "+file_path+" 打开错误");
+            return; // 提前返回
+        }
+        QTextStream in(&file);
+        text_edit->setMarkdown(in.readAll());
+        file.close();
+    });
+    connect(saveAction,&QAction::triggered,[&]{
+        qDebug()<<"保存...";
+        QString file_path = QFileDialog::getSaveFileName(this,"保存文件",".","Markdown(*.md)");
+        QFile file(file_path);
+        if(!file.open(QIODevice::WriteOnly|QIODevice::Text)){
+            QMessageBox::critical(this,"错误","文件路径 "+file_path+"无法保存");
+            return;
+        }
+        QTextStream out(&file);
+        out << text_edit->toMarkdown();
+        file.close();
+    });
+    connect(exitAction,&QAction::triggered,[&]{
+        qDebug()<<"退出...";
+        this->close();
+    });
+    openAction->setIcon(QIcon(":open"));
+    saveAction->setIcon(QIcon(":save"));
+    menu1->addAction(openAction);
+    menu1->addAction(saveAction);
+    menu1->addAction(exitAction);
+
+    menu2 = new QMenu("编辑",menu_bar);
+    menu3 = new QMenu("查看",menu_bar);
+    menu4 = new QMenu("关于",menu_bar);
+    aboutAction = new QAction("关于软件",menu4);
+    aboutQtAction = new QAction("关于Qt",menu4);
+    connect(aboutAction,&QAction::triggered,[&]{
+        QMessageBox::about(this,"简单记事","这是一个简单的记事本");
+    });
+    connect(aboutQtAction,&QAction::triggered,[&]{
+        QMessageBox::aboutQt(this);
+    });
+    menu4->addAction(aboutAction);
+    menu4->addAction(aboutQtAction);
+
+    menu_bar->addMenu(menu1);
+    menu_bar->addMenu(menu2);
+    menu_bar->addMenu(menu3);
+    menu_bar->addMenu(menu4);
+
+
+
+    status_bar = new QStatusBar(this);
+    QLabel *left_status_label = new QLabel("行4 列19",status_bar);
+    QLabel *right_status_label = new QLabel("utf-8",status_bar);
+
+    status_bar->addWidget(left_status_label);
+    status_bar->addPermanentWidget(right_status_label); // 添加永久小部件
+    setStatusBar(status_bar);
+
+    text_edit = new QTextEdit("文本区占位符",this);
+    setCentralWidget(text_edit);
+
+}
+
+MainWindow::~MainWindow()
+{
+}
+

homework-day2-2/mainwindow.h

@@ -0,0 +1,34 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QDebug>
+#include <QMainWindow>
+#include <QMenu>
+#include <QMenuBar>
+#include <QAction>
+#include <QTextEdit>
+#include <QStatusBar>
+#include <QFileDialog>
+#include <QFile>
+#include <QMessageBox>
+#include <QTextStream>
+#include <QLabel>
+#include <QPixmap>
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+private:
+    QMenuBar *menu_bar; // 菜单栏
+    QMenu *menu1,*menu2,*menu3,*menu4; // 文件、编辑、查看、关于
+    QStatusBar *status_bar; // 状态栏
+    QTextEdit *text_edit; // 文本编辑（中心空间）
+    QAction *openAction,*saveAction,*exitAction; // 打开、保存、退出
+    QAction *aboutAction,*aboutQtAction; // 关于、关于Qt
+
+public:
+    MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+};
+#endif // MAINWINDOW_H

homework-day2-2/res.qrc

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+<RCC>
+    <qresource prefix="/">
+        <file alias="logo">images/logo.png</file>
+        <file alias="open">images/open.png</file>
+        <file alias="save">images/save.png</file>
+    </qresource>
+</RCC>

homework-day2/.gitignore

@@ -0,0 +1,73 @@
+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+
+# qtcreator generated files
+*.pro.user*
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

homework-day2/homework-day2.pro

@@ -0,0 +1,30 @@
+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 \
+    mainwindow.cpp \
+    widget1.cpp
+
+HEADERS += \
+    mainwindow.h \
+    widget1.h
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

homework-day2/main.cpp

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

homework-day2/mainwindow.cpp

@@ -0,0 +1,15 @@
+#include "mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setFixedSize(800,600);
+    widget1 = new Widget1(this);
+
+    setCentralWidget(widget1);
+}
+
+MainWindow::~MainWindow()
+{
+}
+

homework-day2/mainwindow.h

@@ -0,0 +1,18 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <widget1.h>
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+private:
+    Widget1 *widget1;
+
+public:
+    MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+};
+#endif // MAINWINDOW_H

homework-day2/widget1.cpp

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+#include "widget1.h"
+
+Widget1::Widget1(QWidget *parent) : QWidget(parent)
+{
+    setFixedSize(800,600);
+
+    line_edit = new QLineEdit("请输入网址: ",this);
+    label = new QLabel(this);
+    label->setText("label 占位");
+
+    line_edit->setFixedSize(800,50);
+    label->setFixedSize(800,540);
+    label->move(0,60);
+
+}

homework-day2/widget1.h

@@ -0,0 +1,23 @@
+#ifndef WIDGET1_H
+#define WIDGET1_H
+
+#include <QWidget>
+#include <QLineEdit>
+#include <QLabel>
+
+class Widget1 : public QWidget
+{
+    Q_OBJECT
+
+private:
+    QLineEdit *line_edit; // 用于网址输入的单行文本编辑器
+    QLabel *label; // QLabel ，设置足够大
+
+public:
+    explicit Widget1(QWidget *parent = nullptr);
+
+signals:
+
+};
+
+#endif // WIDGET1_H