urllineedit.h Example File

  /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the demonstration applications of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** 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 http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 2.1 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #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(QStyleOptionFrameV2 *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();

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

  };

  #endif // URLLINEEDIT_H