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