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 QSPLITTER_P_H
5#define QSPLITTER_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtWidgets/private/qtwidgetsglobal_p.h>
19#include "private/qframe_p.h"
20
21#include <QtCore/qpointer.h>
22
23QT_REQUIRE_CONFIG(splitter);
24
25QT_BEGIN_NAMESPACE
26
27static const uint Default = 2;
28
29class QSplitterLayoutStruct
30{
31public:
32 QRect rect;
33 int sizer;
34 uint collapsed : 1;
35 uint collapsible : 2;
36 QWidget *widget;
37 QSplitterHandle *handle;
38
39 QSplitterLayoutStruct() : sizer(-1), collapsed(false), collapsible(Default), widget(nullptr), handle(nullptr) {}
40 ~QSplitterLayoutStruct() { delete handle; }
41 int getWidgetSize(Qt::Orientation orient);
42 int getHandleSize(Qt::Orientation orient);
43 int pick(const QSize &size, Qt::Orientation orient)
44 { return (orient == Qt::Horizontal) ? size.width() : size.height(); }
45};
46
47class QSplitterPrivate : public QFramePrivate
48{
49 Q_DECLARE_PUBLIC(QSplitter)
50public:
51 QSplitterPrivate() :
52#if QT_CONFIG(rubberband)
53 rubberBand(nullptr),
54#endif
55 opaque(true), firstShow(true),
56 childrenCollapsible(true), compatMode(false), handleWidth(-1), blockChildAdd(false), opaqueResizeSet(false) {}
57 ~QSplitterPrivate();
58
59#if QT_CONFIG(rubberband)
60 QPointer<QRubberBand> rubberBand;
61#endif
62 mutable QList<QSplitterLayoutStruct *> list;
63 Qt::Orientation orient;
64 bool opaque : 8;
65 bool firstShow : 8;
66 bool childrenCollapsible : 8;
67 bool compatMode : 8;
68 int handleWidth;
69 bool blockChildAdd;
70 bool opaqueResizeSet;
71
72 inline int pick(const QPoint &pos) const
73 { return orient == Qt::Horizontal ? pos.x() : pos.y(); }
74 inline int pick(const QSize &s) const
75 { return orient == Qt::Horizontal ? s.width() : s.height(); }
76
77 inline int trans(const QPoint &pos) const
78 { return orient == Qt::Vertical ? pos.x() : pos.y(); }
79 inline int trans(const QSize &s) const
80 { return orient == Qt::Vertical ? s.width() : s.height(); }
81
82 void init();
83 void recalc(bool update = false);
84 void doResize();
85 void storeSizes();
86 void getRange(int index, int *, int *, int *, int *) const;
87 void addContribution(int, int *, int *, bool) const;
88 int adjustPos(int, int, int *, int *, int *, int *) const;
89 bool collapsible(QSplitterLayoutStruct *) const;
90 bool collapsible(int index) const
91 { return (index < 0 || index >= list.size()) ? true : collapsible(list.at(i: index)); }
92 QSplitterLayoutStruct *findWidget(QWidget *) const;
93 void insertWidget_helper(int index, QWidget *widget, bool show);
94 QSplitterLayoutStruct *insertWidget(int index, QWidget *);
95 void doMove(bool backwards, int pos, int index, int delta,
96 bool mayCollapse, int *positions, int *widths);
97 void setGeo(QSplitterLayoutStruct *s, int pos, int size, bool allowCollapse);
98 int findWidgetJustBeforeOrJustAfter(int index, int delta, int &collapsibleSize) const;
99 void updateHandles();
100 void setSizes_helper(const QList<int> &sizes, bool clampNegativeSize = false);
101 bool shouldShowWidget(const QWidget *w) const;
102
103};
104
105class QSplitterHandlePrivate : public QWidgetPrivate
106{
107 Q_DECLARE_PUBLIC(QSplitterHandle)
108public:
109 QSplitterHandlePrivate() : s(nullptr), orient(Qt::Horizontal), mouseOffset(0), opaq(false), hover(false), pressed(false) {}
110
111 inline int pick(const QPoint &pos) const
112 { return orient == Qt::Horizontal ? pos.x() : pos.y(); }
113
114 QSplitter *s;
115 Qt::Orientation orient;
116 int mouseOffset;
117 bool opaq : 1;
118 bool hover : 1;
119 bool pressed : 1;
120};
121
122QT_END_NAMESPACE
123
124#endif
125

source code of qtbase/src/widgets/widgets/qsplitter_p.h