urllineedit.h Example File

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  #ifndef URLLINEEDIT_H
  #define URLLINEEDIT_H

  #include <QtCore/QUrl>
  #include <QtWidgets/QWidget>
  #include <QtWidgets/QStyleOptionFrame>

  class QLineEdit;

  class ClearButton;
  class ExLineEdit : public QWidget
  {
      Q_OBJECT

  public:
      ExLineEdit(QWidget *parent = 0);

      inline QLineEdit *lineEdit() const { return m_lineEdit; }

      void setLeftWidget(QWidget *widget);
      QWidget *leftWidget() const;

      QSize sizeHint() const;

      QVariant inputMethodQuery(Qt::InputMethodQuery property) const;
  protected:
      void focusInEvent(QFocusEvent *event);
      void focusOutEvent(QFocusEvent *event);
      void keyPressEvent(QKeyEvent *event);
      void paintEvent(QPaintEvent *event);
      void resizeEvent(QResizeEvent *event);
      void inputMethodEvent(QInputMethodEvent *e);
      bool event(QEvent *event);

  protected:
      void updateGeometries();
      void initStyleOption(QStyleOptionFrame *option) const;

      QWidget *m_leftWidget;
      QLineEdit *m_lineEdit;
      ClearButton *m_clearButton;
  };

  class UrlIconLabel;
  class WebView;
  class UrlLineEdit : public ExLineEdit
  {
      Q_OBJECT

  public:
      UrlLineEdit(QWidget *parent = 0);
      void setWebView(WebView *webView);

  protected:
      void paintEvent(QPaintEvent *event);
      void focusOutEvent(QFocusEvent *event);

  private slots:
      void webViewUrlChanged(const QUrl &url);
      void webViewIconChanged(const QIcon &icon);

  private:
      QLinearGradient generateGradient(const QColor &color) const;
      WebView *m_webView;
      UrlIconLabel *m_iconLabel;
      QColor m_defaultBaseColor;

  };

  #endif // URLLINEEDIT_H