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39
40#ifndef QQUICKTEXTUTIL_P_H
41#define QQUICKTEXTUTIL_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 <QtQml/qqml.h>
55#include <QtQml/qqmlincubator.h>
56#include <QtQuick/qquickitem.h>
57#include <QtQuick/qquickwindow.h>
58
59QT_BEGIN_NAMESPACE
60
61class QQuickTextUtil : public QObject // For the benefit of translations.
62{
63 Q_OBJECT
64public:
65 template <typename Private> static void setCursorDelegate(Private *d, QQmlComponent *delegate);
66 template <typename Private> static void createCursor(Private *d);
67
68 template <typename T> static typename T::RenderType textRenderType();
69
70 static qreal alignedX(qreal textWidth, qreal itemWidth, int alignment);
71 static qreal alignedY(qreal textHeight, qreal itemHeight, int alignment);
72
73private:
74 static QQuickItem *createCursor(
75 QQmlComponent *component,
76 QQuickItem *parent,
77 const QRectF &cursorRectangle,
78 const char *className);
79
80};
81
82template <typename Private>
83void QQuickTextUtil::setCursorDelegate(Private *d, QQmlComponent *delegate)
84{
85 if (d->cursorComponent == delegate)
86 return;
87
88 typename Private::Public *parent = d->q_func();
89
90 if (d->cursorComponent) {
91 disconnect(d->cursorComponent, SIGNAL(statusChanged(QQmlComponent::Status)),
92 parent, SLOT(createCursor()));
93 }
94
95 delete d->cursorItem;
96 d->cursorItem = 0;
97 d->cursorPending = true;
98
99 d->cursorComponent = delegate;
100
101 if (parent->isCursorVisible() && parent->isComponentComplete())
102 createCursor(d);
103
104 Q_EMIT parent->cursorDelegateChanged();
105}
106
107template <typename Private>
108void QQuickTextUtil::createCursor(Private *d)
109{
110 if (!d->cursorPending)
111 return;
112
113 d->cursorPending = false;
114
115 typename Private::Public *parent = d->q_func();
116 if (d->cursorComponent) {
117 d->cursorItem = createCursor(
118 d->cursorComponent,
119 parent,
120 parent->cursorRectangle(),
121 Private::Public::staticMetaObject.className());
122 }
123
124 d->setNativeCursorEnabled(!d->cursorItem);
125 d->updateType = Private::UpdatePaintNode;
126 parent->update();
127}
128
129template <typename T>
130typename T::RenderType QQuickTextUtil::textRenderType()
131{
132 switch (QQuickWindow::textRenderType()) {
133 case QQuickWindow::QtTextRendering:
134 return T::QtRendering;
135 case QQuickWindow::NativeTextRendering:
136 return T::NativeRendering;
137 }
138
139 Q_UNREACHABLE();
140 return T::QtRendering;
141}
142
143QT_END_NAMESPACE
144
145#endif
146