| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QWIDGETRESIZEHANDLER_P_H |
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| 5 | #define QWIDGETRESIZEHANDLER_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. This header file may |
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| 12 | // change from version to version without notice, or even be |
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| 13 | // removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QtWidgets/private/qtwidgetsglobal_p.h> |
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| 19 | #include "QtCore/qobject.h" |
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| 20 | #include "QtCore/qpoint.h" |
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| 21 | |
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| 22 | QT_REQUIRE_CONFIG(resizehandler); |
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| 23 | |
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| 24 | QT_BEGIN_NAMESPACE |
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| 25 | |
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| 26 | class QMouseEvent; |
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| 27 | class QKeyEvent; |
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| 28 | |
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| 29 | class QWidgetResizeHandler : public QObject |
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| 30 | { |
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| 31 | Q_OBJECT |
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| 32 | |
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| 33 | public: |
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| 34 | explicit QWidgetResizeHandler(QWidget *parent, QWidget *cw = nullptr); |
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| 35 | void setEnabled(bool b); |
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| 36 | bool isEnabled() const; |
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| 37 | |
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| 38 | bool isButtonDown() const { return buttonDown; } |
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| 39 | |
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| 40 | void setExtraHeight(int h) { extrahei = h; } |
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| 41 | |
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| 42 | void setFrameWidth(int w) { fw = w; } |
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| 43 | |
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| 44 | void doResize(); |
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| 45 | |
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| 46 | Q_SIGNALS: |
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| 47 | void activate(); |
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| 48 | |
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| 49 | protected: |
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| 50 | bool eventFilter(QObject *o, QEvent *e) override; |
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| 51 | void mouseMoveEvent(QMouseEvent *e); |
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| 52 | void keyPressEvent(QKeyEvent *e); |
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| 53 | |
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| 54 | private: |
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| 55 | Q_DISABLE_COPY_MOVE(QWidgetResizeHandler) |
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| 56 | |
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| 57 | enum MousePosition { |
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| 58 | Nowhere, |
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| 59 | TopLeft, BottomRight, BottomLeft, TopRight, |
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| 60 | Top, Bottom, Left, Right, |
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| 61 | Center |
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| 62 | }; |
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| 63 | |
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| 64 | QWidget *widget; |
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| 65 | QWidget *childWidget; |
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| 66 | QPoint moveOffset; |
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| 67 | QPoint invertedMoveOffset; |
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| 68 | MousePosition mode; |
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| 69 | int fw; |
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| 70 | int extrahei; |
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| 71 | int range; |
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| 72 | uint buttonDown :1; |
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| 73 | uint active :1; |
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| 74 | uint enabled :1; |
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| 75 | |
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| 76 | void setMouseCursor(MousePosition m); |
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| 77 | bool isResizing() const { |
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| 78 | return active && mode != Center; |
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| 79 | } |
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| 80 | }; |
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| 81 | |
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| 82 | QT_END_NAMESPACE |
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| 83 | |
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| 84 | #endif // QWIDGETRESIZEHANDLER_P_H |
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| 85 | |
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