classwizard.cpp Example File | Qt Widgets 5.12.4

Qt 5.12 | Qt Widgets | Class Wizard Example | classwizard.cpp Example File

Qt 5.12.4 Reference Documentation

# classwizard.cpp Example File

dialogs/classwizard/classwizard.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include <QtWidgets>

      #include "classwizard.h"

      ClassWizard::ClassWizard(QWidget *parent)
          : QWizard(parent)
      {
          addPage(new IntroPage);
          addPage(new ClassInfoPage);
          addPage(new CodeStylePage);
          addPage(new OutputFilesPage);
          addPage(new ConclusionPage);

          setPixmap(QWizard::BannerPixmap, QPixmap(":/images/banner.png"));
          setPixmap(QWizard::BackgroundPixmap, QPixmap(":/images/background.png"));

          setWindowTitle(tr("Class Wizard"));
      }

      void ClassWizard::accept()
      {
          QByteArray className = field("className").toByteArray();
          QByteArray baseClass = field("baseClass").toByteArray();
          QByteArray macroName = field("macroName").toByteArray();
          QByteArray baseInclude = field("baseInclude").toByteArray();

          QString outputDir = field("outputDir").toString();
          QString header = field("header").toString();
          QString implementation = field("implementation").toString();

          QByteArray block;

          if (field("comment").toBool()) {
              block += "/*\n";
              block += "    " + header.toLatin1() + '\n';
              block += "*/\n";
              block += '\n';
          }
          if (field("protect").toBool()) {
              block += "#ifndef " + macroName + '\n';
              block += "#define " + macroName + '\n';
              block += '\n';
          }
          if (field("includeBase").toBool()) {
              block += "#include " + baseInclude + '\n';
              block += '\n';
          }

          block += "class " + className;
          if (!baseClass.isEmpty())
              block += " : public " + baseClass;
          block += '\n';
          block += "{\n";

          /* qmake ignore Q_OBJECT */

          if (field("qobjectMacro").toBool()) {
              block += "    Q_OBJECT\n";
              block += '\n';
          }
          block += "public:\n";

          if (field("qobjectCtor").toBool()) {
              block += "    " + className + "(QObject *parent = 0);\n";
          } else if (field("qwidgetCtor").toBool()) {
              block += "    " + className + "(QWidget *parent = 0);\n";
          } else if (field("defaultCtor").toBool()) {
              block += "    " + className + "();\n";
              if (field("copyCtor").toBool()) {
                  block += "    " + className + "(const " + className + " &other);\n";
                  block += '\n';
                  block += "    " + className + " &operator=" + "(const " + className
                           + " &other);\n";
              }
          }
          block += "};\n";

          if (field("protect").toBool()) {
              block += '\n';
              block += "#endif\n";
          }

          QFile headerFile(outputDir + '/' + header);
          if (!headerFile.open(QFile::WriteOnly | QFile::Text)) {
              QMessageBox::warning(0, QObject::tr("Simple Wizard"),
                                   QObject::tr("Cannot write file %1:\n%2")
                                   .arg(headerFile.fileName())
                                   .arg(headerFile.errorString()));
              return;
          }
          headerFile.write(block);

          block.clear();

          if (field("comment").toBool()) {
              block += "/*\n";
              block += "    " + implementation.toLatin1() + '\n';
              block += "*/\n";
              block += '\n';
          }
          block += "#include \"" + header.toLatin1() + "\"\n";
          block += '\n';

          if (field("qobjectCtor").toBool()) {
              block += className + "::" + className + "(QObject *parent)\n";
              block += "    : " + baseClass + "(parent)\n";
              block += "{\n";
              block += "}\n";
          } else if (field("qwidgetCtor").toBool()) {
              block += className + "::" + className + "(QWidget *parent)\n";
              block += "    : " + baseClass + "(parent)\n";
              block += "{\n";
              block += "}\n";
          } else if (field("defaultCtor").toBool()) {
              block += className + "::" + className + "()\n";
              block += "{\n";
              block += "    // missing code\n";
              block += "}\n";

              if (field("copyCtor").toBool()) {
                  block += "\n";
                  block += className + "::" + className + "(const " + className
                           + " &other)\n";
                  block += "{\n";
                  block += "    *this = other;\n";
                  block += "}\n";
                  block += '\n';
                  block += className + " &" + className + "::operator=(const "
                           + className + " &other)\n";
                  block += "{\n";
                  if (!baseClass.isEmpty())
                      block += "    " + baseClass + "::operator=(other);\n";
                  block += "    // missing code\n";
                  block += "    return *this;\n";
                  block += "}\n";
              }
          }

          QFile implementationFile(outputDir + '/' + implementation);
          if (!implementationFile.open(QFile::WriteOnly | QFile::Text)) {
              QMessageBox::warning(0, QObject::tr("Simple Wizard"),
                                   QObject::tr("Cannot write file %1:\n%2")
                                   .arg(implementationFile.fileName())
                                   .arg(implementationFile.errorString()));
              return;
          }
          implementationFile.write(block);

          QDialog::accept();
      }

      IntroPage::IntroPage(QWidget *parent)
          : QWizardPage(parent)
      {
          setTitle(tr("Introduction"));
          setPixmap(QWizard::WatermarkPixmap, QPixmap(":/images/watermark1.png"));

          label = new QLabel(tr("This wizard will generate a skeleton C++ class "
                                "definition, including a few functions. You simply "
                                "need to specify the class name and set a few "
                                "options to produce a header file and an "
                                "implementation file for your new C++ class."));
          label->setWordWrap(true);

          QVBoxLayout *layout = new QVBoxLayout;
          layout->addWidget(label);
          setLayout(layout);
      }

      ClassInfoPage::ClassInfoPage(QWidget *parent)
          : QWizardPage(parent)
      {
          setTitle(tr("Class Information"));
          setSubTitle(tr("Specify basic information about the class for which you "
                         "want to generate skeleton source code files."));
          setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo1.png"));

          classNameLabel = new QLabel(tr("&Class name:"));
          classNameLineEdit = new QLineEdit;
          classNameLabel->setBuddy(classNameLineEdit);

          baseClassLabel = new QLabel(tr("B&ase class:"));
          baseClassLineEdit = new QLineEdit;
          baseClassLabel->setBuddy(baseClassLineEdit);

          qobjectMacroCheckBox = new QCheckBox(tr("Generate Q_OBJECT &macro"));

          groupBox = new QGroupBox(tr("C&onstructor"));

          qobjectCtorRadioButton = new QRadioButton(tr("&QObject-style constructor"));
          qwidgetCtorRadioButton = new QRadioButton(tr("Q&Widget-style constructor"));
          defaultCtorRadioButton = new QRadioButton(tr("&Default constructor"));
          copyCtorCheckBox = new QCheckBox(tr("&Generate copy constructor and "
                                              "operator="));

          defaultCtorRadioButton->setChecked(true);

          connect(defaultCtorRadioButton, &QAbstractButton::toggled,
                  copyCtorCheckBox, &QWidget::setEnabled);

          registerField("className*", classNameLineEdit);
          registerField("baseClass", baseClassLineEdit);
          registerField("qobjectMacro", qobjectMacroCheckBox);
          registerField("qobjectCtor", qobjectCtorRadioButton);
          registerField("qwidgetCtor", qwidgetCtorRadioButton);
          registerField("defaultCtor", defaultCtorRadioButton);
          registerField("copyCtor", copyCtorCheckBox);

          QVBoxLayout *groupBoxLayout = new QVBoxLayout;
          groupBoxLayout->addWidget(qobjectCtorRadioButton);
          groupBoxLayout->addWidget(qwidgetCtorRadioButton);
          groupBoxLayout->addWidget(defaultCtorRadioButton);
          groupBoxLayout->addWidget(copyCtorCheckBox);
          groupBox->setLayout(groupBoxLayout);

          QGridLayout *layout = new QGridLayout;
          layout->addWidget(classNameLabel, 0, 0);
          layout->addWidget(classNameLineEdit, 0, 1);
          layout->addWidget(baseClassLabel, 1, 0);
          layout->addWidget(baseClassLineEdit, 1, 1);
          layout->addWidget(qobjectMacroCheckBox, 2, 0, 1, 2);
          layout->addWidget(groupBox, 3, 0, 1, 2);
          setLayout(layout);
      }

      CodeStylePage::CodeStylePage(QWidget *parent)
          : QWizardPage(parent)
      {
          setTitle(tr("Code Style Options"));
          setSubTitle(tr("Choose the formatting of the generated code."));
          setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo2.png"));

          commentCheckBox = new QCheckBox(tr("&Start generated files with a "
                                             "comment"));
          commentCheckBox->setChecked(true);

          protectCheckBox = new QCheckBox(tr("&Protect header file against multiple "
                                             "inclusions"));
          protectCheckBox->setChecked(true);

          macroNameLabel = new QLabel(tr("&Macro name:"));
          macroNameLineEdit = new QLineEdit;
          macroNameLabel->setBuddy(macroNameLineEdit);

          includeBaseCheckBox = new QCheckBox(tr("&Include base class definition"));
          baseIncludeLabel = new QLabel(tr("Base class include:"));
          baseIncludeLineEdit = new QLineEdit;
          baseIncludeLabel->setBuddy(baseIncludeLineEdit);

          connect(protectCheckBox, &QAbstractButton::toggled,
                  macroNameLabel, &QWidget::setEnabled);
          connect(protectCheckBox, &QAbstractButton::toggled,
                  macroNameLineEdit, &QWidget::setEnabled);
          connect(includeBaseCheckBox, &QAbstractButton::toggled,
                  baseIncludeLabel, &QWidget::setEnabled);
          connect(includeBaseCheckBox, &QAbstractButton::toggled,
                  baseIncludeLineEdit, &QWidget::setEnabled);

          registerField("comment", commentCheckBox);
          registerField("protect", protectCheckBox);
          registerField("macroName", macroNameLineEdit);
          registerField("includeBase", includeBaseCheckBox);
          registerField("baseInclude", baseIncludeLineEdit);

          QGridLayout *layout = new QGridLayout;
          layout->setColumnMinimumWidth(0, 20);
          layout->addWidget(commentCheckBox, 0, 0, 1, 3);
          layout->addWidget(protectCheckBox, 1, 0, 1, 3);
          layout->addWidget(macroNameLabel, 2, 1);
          layout->addWidget(macroNameLineEdit, 2, 2);
          layout->addWidget(includeBaseCheckBox, 3, 0, 1, 3);
          layout->addWidget(baseIncludeLabel, 4, 1);
          layout->addWidget(baseIncludeLineEdit, 4, 2);
          setLayout(layout);
      }

      void CodeStylePage::initializePage()
      {
          QString className = field("className").toString();
          macroNameLineEdit->setText(className.toUpper() + "_H");

          QString baseClass = field("baseClass").toString();

          includeBaseCheckBox->setChecked(!baseClass.isEmpty());
          includeBaseCheckBox->setEnabled(!baseClass.isEmpty());
          baseIncludeLabel->setEnabled(!baseClass.isEmpty());
          baseIncludeLineEdit->setEnabled(!baseClass.isEmpty());

          QRegularExpression rx("Q[A-Z].*");
          if (baseClass.isEmpty()) {
              baseIncludeLineEdit->clear();
          } else if (rx.match(baseClass).hasMatch()) {
              baseIncludeLineEdit->setText('<' + baseClass + '>');
          } else {
              baseIncludeLineEdit->setText('"' + baseClass.toLower() + ".h\"");
          }
      }

      OutputFilesPage::OutputFilesPage(QWidget *parent)
          : QWizardPage(parent)
      {
          setTitle(tr("Output Files"));
          setSubTitle(tr("Specify where you want the wizard to put the generated "
                         "skeleton code."));
          setPixmap(QWizard::LogoPixmap, QPixmap(":/images/logo3.png"));

          outputDirLabel = new QLabel(tr("&Output directory:"));
          outputDirLineEdit = new QLineEdit;
          outputDirLabel->setBuddy(outputDirLineEdit);

          headerLabel = new QLabel(tr("&Header file name:"));
          headerLineEdit = new QLineEdit;
          headerLabel->setBuddy(headerLineEdit);

          implementationLabel = new QLabel(tr("&Implementation file name:"));
          implementationLineEdit = new QLineEdit;
          implementationLabel->setBuddy(implementationLineEdit);

          registerField("outputDir*", outputDirLineEdit);
          registerField("header*", headerLineEdit);
          registerField("implementation*", implementationLineEdit);

          QGridLayout *layout = new QGridLayout;
          layout->addWidget(outputDirLabel, 0, 0);
          layout->addWidget(outputDirLineEdit, 0, 1);
          layout->addWidget(headerLabel, 1, 0);
          layout->addWidget(headerLineEdit, 1, 1);
          layout->addWidget(implementationLabel, 2, 0);
          layout->addWidget(implementationLineEdit, 2, 1);
          setLayout(layout);
      }

      void OutputFilesPage::initializePage()
      {
          QString className = field("className").toString();
          headerLineEdit->setText(className.toLower() + ".h");
          implementationLineEdit->setText(className.toLower() + ".cpp");
          outputDirLineEdit->setText(QDir::toNativeSeparators(QDir::tempPath()));
      }

      ConclusionPage::ConclusionPage(QWidget *parent)
          : QWizardPage(parent)
      {
          setTitle(tr("Conclusion"));
          setPixmap(QWizard::WatermarkPixmap, QPixmap(":/images/watermark2.png"));

          label = new QLabel;
          label->setWordWrap(true);

          QVBoxLayout *layout = new QVBoxLayout;
          layout->addWidget(label);
          setLayout(layout);
      }

      void ConclusionPage::initializePage()
      {
          QString finishText = wizard()->buttonText(QWizard::FinishButton);
          finishText.remove('&');
          label->setText(tr("Click %1 to generate the class skeleton.")
                         .arg(finishText));
      }