feat: MDI(Multi-document Interface)

QtMDIEx/ExMDI.cpp

@@ -19,8 +19,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://touwoyimuli.github.io/>.
  */
-
-
 #include "ExMDI.h"
 #include "ui_ExMDI.h"
 
@@ -29,9 +27,65 @@ ExMDI::ExMDI(QWidget *parent) :
     ui(new Ui::ExMDI)
 {
     ui->setupUi(this);
+
+    setWindowTitle("多文档界面MDI (Multi-dociment Interface) 的介绍和使用");
+    setAttribute(Qt::WA_DeleteOnClose);  //无论是否设置关闭时候删除；在MDI中关闭一个MDI子窗口都会删除子窗口对象
+    this->setWindowIcon(QIcon("/Users/yuanyi/picture/发布、头像、测试图片/icon.png"));
 }
 
 ExMDI::~ExMDI()
 {
     delete ui;
 }
+
+//打开文件
+void ExMDI::loadFromFile(QString &fileName)
+{
+    QFile file(fileName);  //文件以读的方式读出
+
+    if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        QTextStream stream(&file);  //以文本流方式读取文件
+        ui->plainTextEdit->clear();
+        ui->plainTextEdit->setPlainText(stream.readAll());
+        file.close();
+
+        m_currentFile = fileName;
+        QFileInfo fileInfo(fileName);    //文件信息
+        setWindowTitle(fileInfo.fileName());
+        m_fileOpened = true;
+    }
+}
+
+QString ExMDI::currentFileName()
+{
+    return m_currentFile;
+}
+
+bool ExMDI::isFileOpended()
+{
+    return m_fileOpened;
+}
+
+void ExMDI::setEditFont()
+{
+    QFont font = ui->plainTextEdit->font();
+    bool ok;
+    font = QFontDialog::getFont(&ok, font);
+    ui->plainTextEdit->setFont(font);
+
+}
+
+void ExMDI::textCut()
+{
+    ui->plainTextEdit->cut();
+}
+
+void ExMDI::textCopy()
+{
+    ui->plainTextEdit->copy();
+}
+
+void ExMDI::textPaste()
+{
+    ui->plainTextEdit->paste();
+}