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 14 ** and conditions see https://www.qt.io/terms-conditions. For further 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 40 #ifndef QWIDGETRESIZEHANDLER_P_H 41 #define QWIDGETRESIZEHANDLER_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. This header file may 48 // change from version to version without notice, or even be 49 // removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtWidgets/private/qtwidgetsglobal_p.h> 55 #include "QtCore/qobject.h" 56 #include "QtCore/qpoint.h" 57 58 QT_REQUIRE_CONFIG(resizehandler); 59 60 QT_BEGIN_NAMESPACE 61 62 class QMouseEvent; 63 class QKeyEvent; 64 65 class Q_WIDGETS_EXPORT QWidgetResizeHandler : public QObject 66 { 67 Q_OBJECT 68 69 public: 70 enum Action { 71 Move = 0x01, 72 Resize = 0x02, 73 Any = Move|Resize 74 }; 75 76 explicit QWidgetResizeHandler(QWidget *parent, QWidget *cw = nullptr); setActive(bool b)77 void setActive(bool b) { setActive(Any, b); } 78 void setActive(Action ac, bool b); isActive()79 bool isActive() const { return isActive(Any); } 80 bool isActive(Action ac) const; setMovingEnabled(bool b)81 void setMovingEnabled(bool b) { movingEnabled = b; } isMovingEnabled()82 bool isMovingEnabled() const { return movingEnabled; } 83 isButtonDown()84 bool isButtonDown() const { return buttonDown; } 85 setExtraHeight(int h)86 void setExtraHeight(int h) { extrahei = h; } setSizeProtection(bool b)87 void setSizeProtection(bool b) { sizeprotect = b; } 88 setFrameWidth(int w)89 void setFrameWidth(int w) { fw = w; } 90 91 void doResize(); 92 void doMove(); 93 94 Q_SIGNALS: 95 void activate(); 96 97 protected: 98 bool eventFilter(QObject *o, QEvent *e) override; 99 void mouseMoveEvent(QMouseEvent *e); 100 void keyPressEvent(QKeyEvent *e); 101 102 private: 103 Q_DISABLE_COPY_MOVE(QWidgetResizeHandler) 104 105 enum MousePosition { 106 Nowhere, 107 TopLeft, BottomRight, BottomLeft, TopRight, 108 Top, Bottom, Left, Right, 109 Center 110 }; 111 112 QWidget *widget; 113 QWidget *childWidget; 114 QPoint moveOffset; 115 QPoint invertedMoveOffset; 116 MousePosition mode; 117 int fw; 118 int extrahei; 119 int range; 120 uint buttonDown :1; 121 uint moveResizeMode :1; 122 uint activeForResize :1; 123 uint sizeprotect :1; 124 uint movingEnabled :1; 125 uint activeForMove :1; 126 127 void setMouseCursor(MousePosition m); isMove()128 bool isMove() const { 129 return moveResizeMode && mode == Center; 130 } isResize()131 bool isResize() const { 132 return moveResizeMode && !isMove(); 133 } 134 }; 135 136 QT_END_NAMESPACE 137 138 #endif // QWIDGETRESIZEHANDLER_P_H 139