previewwindow.cpp Example File

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  #include <QtWidgets>

  #include "previewwindow.h"

  PreviewWindow::PreviewWindow(QWidget *parent)
      : QWidget(parent)
  {
      textEdit = new QTextEdit;
      textEdit->setReadOnly(true);
      textEdit->setLineWrapMode(QTextEdit::NoWrap);

      closeButton = new QPushButton(tr("&Close"));
      connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));

      QVBoxLayout *layout = new QVBoxLayout;
      layout->addWidget(textEdit);
      layout->addWidget(closeButton);
      setLayout(layout);

      setWindowTitle(tr("Preview"));
  }

  void PreviewWindow::setWindowFlags(Qt::WindowFlags flags)
  {
      QWidget::setWindowFlags(flags);

      QString text;

      Qt::WindowFlags type = (flags & Qt::WindowType_Mask);
      if (type == Qt::Window) {
          text = "Qt::Window";
      } else if (type == Qt::Dialog) {
          text = "Qt::Dialog";
      } else if (type == Qt::Sheet) {
          text = "Qt::Sheet";
      } else if (type == Qt::Drawer) {
          text = "Qt::Drawer";
      } else if (type == Qt::Popup) {
          text = "Qt::Popup";
      } else if (type == Qt::Tool) {
          text = "Qt::Tool";
      } else if (type == Qt::ToolTip) {
          text = "Qt::ToolTip";
      } else if (type == Qt::SplashScreen) {
          text = "Qt::SplashScreen";
      }

      if (flags & Qt::MSWindowsFixedSizeDialogHint)
          text += "\n| Qt::MSWindowsFixedSizeDialogHint";
      if (flags & Qt::X11BypassWindowManagerHint)
          text += "\n| Qt::X11BypassWindowManagerHint";
      if (flags & Qt::FramelessWindowHint)
          text += "\n| Qt::FramelessWindowHint";
      if (flags & Qt::NoDropShadowWindowHint)
          text += "\n| Qt::NoDropShadowWindowHint";
      if (flags & Qt::WindowTitleHint)
          text += "\n| Qt::WindowTitleHint";
      if (flags & Qt::WindowSystemMenuHint)
          text += "\n| Qt::WindowSystemMenuHint";
      if (flags & Qt::WindowMinimizeButtonHint)
          text += "\n| Qt::WindowMinimizeButtonHint";
      if (flags & Qt::WindowMaximizeButtonHint)
          text += "\n| Qt::WindowMaximizeButtonHint";
      if (flags & Qt::WindowCloseButtonHint)
          text += "\n| Qt::WindowCloseButtonHint";
      if (flags & Qt::WindowContextHelpButtonHint)
          text += "\n| Qt::WindowContextHelpButtonHint";
      if (flags & Qt::WindowShadeButtonHint)
          text += "\n| Qt::WindowShadeButtonHint";
      if (flags & Qt::WindowStaysOnTopHint)
          text += "\n| Qt::WindowStaysOnTopHint";
      if (flags & Qt::CustomizeWindowHint)
          text += "\n| Qt::CustomizeWindowHint";

      textEdit->setPlainText(text);
  }