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42 #include "qquickscreen_p.h"
44 #include "qquickitem.h"
45 #include "qquickitem_p.h"
46 #include "qquickcanvas.h"
53 \qmlclass Screen QQuickScreenAttached
54 \inqmlmodule QtQuick.Window 2
55 \brief The Screen attached object provides information about the Screen an Item is displayed on.
57 The Screen attached object is only valid inside Item or Item derived elements. Inside these elements
58 it refers to the screen that the element is currently being displayed on.
62 \qmlattachedproperty int QtQuickWindow2::Screen::width
65 This contains the width of the screen in pixels.
68 \qmlattachedproperty int QtQuickWindow2::Screen::height
71 This contains the height of the screen in pixels.
74 \qmlattachedproperty Qt::ScreenOrientation QtQuickWindow2::Screen::primaryOrientation
77 This contains the primary orientation of the screen. This can only change if the screen changes.
80 \qmlattachedproperty Qt::ScreenOrientation QtQuickWindow2::Screen::currentOrientation
83 This contains the current orientation of the screen.
86 \qmlattachedmethod int QtQuickWindow2::Screen::angleBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b)
88 Returns the rotation angle, in degrees, between the two specified angles.
91 QQuickScreenAttached::QQuickScreenAttached(QObject* attachee)
95 m_attachee = qobject_cast<QQuickItem*>(attachee);
98 QQuickItemPrivate::get(m_attachee)->screenAttached = this;
100 if (m_attachee->canvas()) //It might not be assigned to a canvas yet
101 canvasChanged(m_attachee->canvas());
105 int QQuickScreenAttached::width() const
109 return m_screen->size().width();
112 int QQuickScreenAttached::height() const
116 return m_screen->size().height();
119 Qt::ScreenOrientation QQuickScreenAttached::primaryOrientation() const
122 return Qt::UnknownOrientation;
123 return m_screen->primaryOrientation();
126 Qt::ScreenOrientation QQuickScreenAttached::currentOrientation() const
129 return Qt::UnknownOrientation;
130 return m_screen->currentOrientation();
133 int QQuickScreenAttached::angleBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b)
135 return QScreen::angleBetween(a,b);
138 void QQuickScreenAttached::canvasChanged(QQuickCanvas* c)//Called by QQuickItemPrivate::initCanvas
140 QScreen* screen = c ? c->screen() : 0;
141 if (screen != m_screen) {
142 QScreen* oldScreen = m_screen;
146 disconnect(oldScreen, SIGNAL(sizeChanged(QSize)),
147 this, SIGNAL(widthChanged()));
148 disconnect(oldScreen, SIGNAL(sizeChanged(QSize)),
149 this, SIGNAL(heightChanged()));
150 disconnect(oldScreen, SIGNAL(currentOrientationChanged(Qt::ScreenOrientation)),
151 this, SIGNAL(currentOrientationChanged()));
155 return; //Don't bother emitting signals, because the new values are garbage anyways
157 if (!oldScreen || screen->size() != oldScreen->size()) {
159 emit heightChanged();
161 if (!oldScreen || screen->currentOrientation() != oldScreen->currentOrientation())
162 emit currentOrientationChanged();
163 if (!oldScreen || screen->primaryOrientation() != oldScreen->primaryOrientation())
164 emit primaryOrientationChanged();
167 connect(screen, SIGNAL(sizeChanged(QSize)),
168 this, SIGNAL(widthChanged()));
169 connect(screen, SIGNAL(sizeChanged(QSize)),
170 this, SIGNAL(heightChanged()));
171 connect(screen, SIGNAL(currentOrientationChanged(Qt::ScreenOrientation)),
172 this, SIGNAL(currentOrientationChanged()));