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39
40 #ifndef QGRAPHICSLAYOUT_P_H
41 #define QGRAPHICSLAYOUT_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 for the convenience
48 // of other Qt classes. 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 <QtWidgets/private/qtwidgetsglobal_p.h>
55
56 #include "qgraphicslayout.h"
57 #include "qgraphicslayoutitem_p.h"
58 #include <QtWidgets/qstyle.h>
59 #include <QtWidgets/qwidget.h>
60 #include <QtWidgets/qstyleoption.h>
61
62 QT_REQUIRE_CONFIG(graphicsview);
63
64 QT_BEGIN_NAMESPACE
65
66 class QGraphicsLayoutItem;
67 class QGraphicsWidget;
68
69 #ifdef QT_DEBUG
qt_graphicsLayoutDebug()70 inline bool qt_graphicsLayoutDebug()
71 {
72 static int checked_env = -1;
73 if(checked_env == -1)
74 checked_env = !!qEnvironmentVariableIntValue("QT_GRAPHICSLAYOUT_DEBUG");
75 return checked_env;
76 }
77 #endif
78
79
80 class QLayoutStyleInfo
81 {
82 public:
QLayoutStyleInfo()83 inline QLayoutStyleInfo() { invalidate(); }
QLayoutStyleInfo(QStyle * style,QWidget * widget)84 inline QLayoutStyleInfo(QStyle *style, QWidget *widget)
85 : m_valid(true), m_style(style), m_widget(widget)
86 {
87 Q_ASSERT(style);
88 if (widget) //###
89 m_styleOption.initFrom(widget);
90 m_defaultSpacing[0] = style->pixelMetric(QStyle::PM_LayoutHorizontalSpacing, &m_styleOption);
91 m_defaultSpacing[1] = style->pixelMetric(QStyle::PM_LayoutVerticalSpacing, &m_styleOption);
92 }
93
invalidate()94 inline void invalidate() { m_valid = false; m_style = nullptr; m_widget = nullptr; }
95
style()96 inline QStyle *style() const { return m_style; }
widget()97 inline QWidget *widget() const { return m_widget; }
98
99 inline bool operator==(const QLayoutStyleInfo &other) const
100 { return m_style == other.m_style && m_widget == other.m_widget; }
101 inline bool operator!=(const QLayoutStyleInfo &other) const
102 { return !(*this == other); }
103
setDefaultSpacing(Qt::Orientation o,qreal spacing)104 inline void setDefaultSpacing(Qt::Orientation o, qreal spacing){
105 if (spacing >= 0)
106 m_defaultSpacing[int(o) - 1] = spacing;
107 }
108
defaultSpacing(Qt::Orientation o)109 inline qreal defaultSpacing(Qt::Orientation o) const {
110 return m_defaultSpacing[int(o) - 1];
111 }
112
perItemSpacing(QSizePolicy::ControlType control1,QSizePolicy::ControlType control2,Qt::Orientation orientation)113 inline qreal perItemSpacing(QSizePolicy::ControlType control1,
114 QSizePolicy::ControlType control2,
115 Qt::Orientation orientation) const
116 {
117 Q_ASSERT(style());
118 return style()->layoutSpacing(control1, control2, orientation, &m_styleOption, widget());
119 }
120 private:
121 bool m_valid;
122 QStyle *m_style;
123 QWidget *m_widget;
124 QStyleOption m_styleOption;
125 qreal m_defaultSpacing[2];
126 };
127
128 class Q_AUTOTEST_EXPORT QGraphicsLayoutPrivate : public QGraphicsLayoutItemPrivate
129 {
Q_DECLARE_PUBLIC(QGraphicsLayout)130 Q_DECLARE_PUBLIC(QGraphicsLayout)
131
132 public:
133 QGraphicsLayoutPrivate() : QGraphicsLayoutItemPrivate(nullptr, true), left(-1.0), top(-1.0), right(-1.0), bottom(-1.0),
134 activated(true) { }
135
136 void reparentChildItems(QGraphicsItem *newParent);
137 void getMargin(qreal *result, qreal userMargin, QStyle::PixelMetric pm) const;
138 Qt::LayoutDirection visualDirection() const;
139
140 void addChildLayoutItem(QGraphicsLayoutItem *item);
141 void activateRecursive(QGraphicsLayoutItem *item);
142
143 qreal left, top, right, bottom;
144 bool activated;
145 };
146
147 QT_END_NAMESPACE
148
149 #endif
150