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39
40#include "qgraphicslayoutstyleinfo_p.h"
41
42#include "qgraphicslayout_p.h"
43#include "qgraphicswidget.h"
44#include <QtWidgets/qstyle.h>
45#include <QtWidgets/qwidget.h>
46#include <QtWidgets/qapplication.h>
47
48QT_BEGIN_NAMESPACE
49
50QGraphicsLayoutStyleInfo::QGraphicsLayoutStyleInfo(const QGraphicsLayoutPrivate *layout)
51 : m_layout(layout), m_style(nullptr)
52{
53 m_widget.reset(p: new QWidget); // pixelMetric might need a widget ptr
54 m_styleOption.initFrom(w: m_widget.get());
55 m_isWindow = m_styleOption.state & QStyle::State_Window;
56}
57
58QGraphicsLayoutStyleInfo::~QGraphicsLayoutStyleInfo()
59{
60}
61
62qreal QGraphicsLayoutStyleInfo::combinedLayoutSpacing(QLayoutPolicy::ControlTypes controls1,
63 QLayoutPolicy::ControlTypes controls2,
64 Qt::Orientation orientation) const
65{
66 Q_ASSERT(style());
67 return style()->combinedLayoutSpacing(controls1: QSizePolicy::ControlTypes(int(controls1)), controls2: QSizePolicy::ControlTypes(int(controls2)),
68 orientation, option: const_cast<QStyleOption*>(&m_styleOption), widget: widget());
69}
70
71qreal QGraphicsLayoutStyleInfo::perItemSpacing(QLayoutPolicy::ControlType control1,
72 QLayoutPolicy::ControlType control2,
73 Qt::Orientation orientation) const
74{
75 Q_ASSERT(style());
76 return style()->layoutSpacing(control1: QSizePolicy::ControlType(control1), control2: QSizePolicy::ControlType(control2),
77 orientation, option: const_cast<QStyleOption*>(&m_styleOption), widget: widget());
78}
79
80qreal QGraphicsLayoutStyleInfo::spacing(Qt::Orientation orientation) const
81{
82 Q_ASSERT(style());
83 return style()->pixelMetric(metric: orientation == Qt::Horizontal
84 ? QStyle::PM_LayoutHorizontalSpacing : QStyle::PM_LayoutVerticalSpacing,
85 option: &m_styleOption);
86}
87
88qreal QGraphicsLayoutStyleInfo::windowMargin(Qt::Orientation orientation) const
89{
90 return style()->pixelMetric(metric: orientation == Qt::Vertical
91 ? QStyle::PM_LayoutBottomMargin
92 : QStyle::PM_LayoutRightMargin,
93 option: const_cast<QStyleOption*>(&m_styleOption), widget: widget());
94}
95
96QWidget *QGraphicsLayoutStyleInfo::widget() const { return m_widget.get(); }
97
98QStyle *QGraphicsLayoutStyleInfo::style() const
99{
100 if (!m_style) {
101 Q_ASSERT(m_layout);
102 QGraphicsItem *item = m_layout->parentItem();
103 m_style = (item && item->isWidget()) ? static_cast<QGraphicsWidget*>(item)->style() : QApplication::style();
104 }
105 return m_style;
106}
107
108QT_END_NAMESPACE
109

source code of qtbase/src/widgets/graphicsview/qgraphicslayoutstyleinfo.cpp