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39
40#ifndef QABSTRACTLAYOUTSTYLEINFO_P_H
41#define QABSTRACTLAYOUTSTYLEINFO_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtGui/private/qtguiglobal_p.h>
55#include <QtCore/qnamespace.h>
56#include "qlayoutpolicy_p.h"
57
58QT_BEGIN_NAMESPACE
59
60
61class Q_GUI_EXPORT QAbstractLayoutStyleInfo {
62public:
63
64 QAbstractLayoutStyleInfo() : m_isWindow(false) {}
65 virtual ~QAbstractLayoutStyleInfo() {}
66 virtual qreal combinedLayoutSpacing(QLayoutPolicy::ControlTypes /*controls1*/,
67 QLayoutPolicy::ControlTypes /*controls2*/, Qt::Orientation /*orientation*/) const {
68 return -1;
69 }
70
71 virtual qreal perItemSpacing(QLayoutPolicy::ControlType /*control1*/,
72 QLayoutPolicy::ControlType /*control2*/,
73 Qt::Orientation /*orientation*/) const {
74 return -1;
75 }
76
77 virtual qreal spacing(Qt::Orientation orientation) const = 0;
78
79 virtual bool hasChangedCore() const { return false; } // ### Remove when usage is gone from subclasses
80
81 virtual void invalidate() { }
82
83 virtual qreal windowMargin(Qt::Orientation orientation) const = 0;
84
85 bool isWindow() const {
86 return m_isWindow;
87 }
88
89protected:
90 unsigned m_isWindow : 1;
91 mutable unsigned m_hSpacingState: 2;
92 mutable unsigned m_vSpacingState: 2;
93 mutable qreal m_spacing[2];
94};
95
96QT_END_NAMESPACE
97
98#endif // QABSTRACTLAYOUTSTYLEINFO_P_H
99