qdesktopwidget.h 3.7 KB

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  1. /****************************************************************************
  2. **
  3. ** Copyright (C) 2016 The Qt Company Ltd.
  4. ** Contact: https://www.qt.io/licensing/
  5. **
  6. ** This file is part of the QtWidgets module of the Qt Toolkit.
  7. **
  8. ** $QT_BEGIN_LICENSE:LGPL$
  9. ** Commercial License Usage
  10. ** Licensees holding valid commercial Qt licenses may use this file in
  11. ** accordance with the commercial license agreement provided with the
  12. ** Software or, alternatively, in accordance with the terms contained in
  13. ** a written agreement between you and The Qt Company. For licensing terms
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  15. ** information use the contact form at https://www.qt.io/contact-us.
  16. **
  17. ** GNU Lesser General Public License Usage
  18. ** Alternatively, this file may be used under the terms of the GNU Lesser
  19. ** General Public License version 3 as published by the Free Software
  20. ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  21. ** packaging of this file. Please review the following information to
  22. ** ensure the GNU Lesser General Public License version 3 requirements
  23. ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  24. **
  25. ** GNU General Public License Usage
  26. ** Alternatively, this file may be used under the terms of the GNU
  27. ** General Public License version 2.0 or (at your option) the GNU General
  28. ** Public license version 3 or any later version approved by the KDE Free
  29. ** Qt Foundation. The licenses are as published by the Free Software
  30. ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
  31. ** included in the packaging of this file. Please review the following
  32. ** information to ensure the GNU General Public License requirements will
  33. ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
  34. ** https://www.gnu.org/licenses/gpl-3.0.html.
  35. **
  36. ** $QT_END_LICENSE$
  37. **
  38. ****************************************************************************/
  39. #ifndef QDESKTOPWIDGET_H
  40. #define QDESKTOPWIDGET_H
  41. #include <QtWidgets/qwidget.h>
  42. QT_BEGIN_NAMESPACE
  43. class QApplication;
  44. class QDesktopWidgetPrivate;
  45. class Q_WIDGETS_EXPORT QDesktopWidget : public QWidget
  46. {
  47. Q_OBJECT
  48. Q_PROPERTY(bool virtualDesktop READ isVirtualDesktop)
  49. Q_PROPERTY(int screenCount READ screenCount NOTIFY screenCountChanged)
  50. Q_PROPERTY(int primaryScreen READ primaryScreen NOTIFY primaryScreenChanged)
  51. public:
  52. QDesktopWidget();
  53. ~QDesktopWidget();
  54. bool isVirtualDesktop() const;
  55. int numScreens() const;
  56. int screenCount() const;
  57. int primaryScreen() const;
  58. int screenNumber(const QWidget *widget = Q_NULLPTR) const;
  59. int screenNumber(const QPoint &) const;
  60. QWidget *screen(int screen = -1);
  61. const QRect screenGeometry(int screen = -1) const;
  62. const QRect screenGeometry(const QWidget *widget) const;
  63. const QRect screenGeometry(const QPoint &point) const
  64. { return screenGeometry(screenNumber(point)); }
  65. const QRect availableGeometry(int screen = -1) const;
  66. const QRect availableGeometry(const QWidget *widget) const;
  67. const QRect availableGeometry(const QPoint &point) const
  68. { return availableGeometry(screenNumber(point)); }
  69. Q_SIGNALS:
  70. void resized(int);
  71. void workAreaResized(int);
  72. void screenCountChanged(int);
  73. void primaryScreenChanged();
  74. protected:
  75. void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE;
  76. private:
  77. Q_DISABLE_COPY(QDesktopWidget)
  78. Q_DECLARE_PRIVATE(QDesktopWidget)
  79. Q_PRIVATE_SLOT(d_func(), void _q_updateScreens())
  80. Q_PRIVATE_SLOT(d_func(), void _q_availableGeometryChanged())
  81. friend class QApplication;
  82. friend class QApplicationPrivate;
  83. };
  84. inline int QDesktopWidget::screenCount() const
  85. { return numScreens(); }
  86. QT_END_NAMESPACE
  87. #endif // QDESKTOPWIDGET_H