Adding ./doc from boost

Reviewer: Lauro Moura <lauro.neto@openbossa.org>
          Luciano Wolf <luciano.wolf@openbossa.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/doc/codesnippets/doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp b/doc/codesnippets/doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp
new file mode 100644
index 000000000..1f1ff39ae
--- /dev/null
+++ b/doc/codesnippets/doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp
@@ -0,0 +1,185 @@
+//! [0]
+class SimpleItem(QGraphicsItem):
+
+    def boundingRect(self):
+        penWidth = 1.0
+        return QRectF(-10 - penWidth / 2, -10 - penWidth / 2,
+                      20 + penWidth, 20 + penWidth)
+
+    def paint(self, painter, option, widget):
+        painter.drawRoundedRect(-10, -10, 20, 20, 5, 5)
+//! [0]
+
+
+//! [1]
+class CustomItem(QGraphicsItem):
+   ...
+   self.Type = QGraphicsItem.UserType + 1
+
+   def type(self):
+       # Enable the use of qgraphicsitem_cast with this item.
+       return self.Type
+   ...
+
+//! [1]
+
+
+//! [2]
+item.setCursor(Qt.IBeamCursor)
+//! [2]
+
+
+//! [3]
+item.setCursor(Qt.IBeamCursor)
+//! [3]
+
+
+//! [4]
+rect = QGraphicsRectItem()
+rect.setPos(100, 100)
+
+rect.sceneTransform().map(QPointF(0, 0))
+# returns QPointF(100, 100)
+
+rect.sceneTransform().inverted().map(QPointF(100, 100))
+# returns QPointF(0, 0);
+//! [4]
+
+
+//! [5]
+rect = QGraphicsRectItem()
+rect.setPos(100, 100)
+
+rect.deviceTransform(view.viewportTransform()).map(QPointF(0, 0))
+# returns the item's (0, 0) point in view's viewport coordinates
+
+rect.deviceTransform(view.viewportTransform()).inverted().map(QPointF(100, 100))
+# returns view's viewport's (100, 100) coordinate in item coordinates
+//! [5]
+
+
+//! [6]
+# Rotate an item 45 degrees around (0, 0)
+item.rotate(45)
+
+# Rotate an item 45 degrees around (x, y)
+item.setTransform(QTransform().translate(x, y).rotate(45).translate(-x, -y))
+//! [6]
+
+
+//! [7]
+# Scale an item by 3x2 from its origin
+item.scale(3, 2)
+
+# Scale an item by 3x2 from (x, y)
+item.setTransform(QTransform().translate(x, y).scale(3, 2).translate(-x, -y))
+//! [7]
+
+
+//! [8]
+def boundingRect(self):
+    penWidth = 1.0
+    return QRectF(-radius - penWidth / 2, -radius - penWidth / 2,
+                  diameter + penWidth, diameter + penWidth)
+//! [8]
+
+
+//! [9]
+def shape(self):
+    path = QPainterPath()
+    path.addEllipse(boundingRect())
+    return path
+//! [9]
+
+
+//! [10]
+def paint(self, painter, option, widget):
+    painter.drawRoundedRect(-10, -10, 20, 20, 5, 5)
+//! [10]
+
+
+//! [11]
+ObjectName = 0;
+
+item = scene.itemAt(100, 50)
+if item.data(ObjectName).toString().isEmpty():
+    if isinstance(ButtonItem, item):
+        item.setData(ObjectName, "Button")
+//! [11]
+
+
+//! [12]
+scene = QGraphicsScene()
+ellipse = scene.addEllipse(QRectF(-10, -10, 20, 20))
+line = scene.addLine(QLineF(-10, -10, 20, 20))
+
+line.installSceneEventFilter(ellipse)
+# line's events are filtered by ellipse's sceneEventFilter() function.
+
+ellipse.installSceneEventFilter(line)
+# ellipse's events are filtered by line's sceneEventFilter() function.
+//! [12]
+
+
+//! [13]
+def contextMenuEvent(self, event):
+    menu = QMenu()
+    removeAction = menu.addAction("Remove")
+    markAction = menu.addAction("Mark")
+    selectedAction = menu.exec(event.screenPos())
+    // ...
+//! [13]
+
+
+//! [14]
+def __init__(self):
+    self.setAcceptDrops(true)
+    ...
+
+def dragEnterEvent(self, event):
+    event.setAccepted(event.mimeData().hasFormat("text/plain"))
+//! [14]
+
+
+//! [15]
+def itemChange(self, change, value):
+    if change == ItemPositionChange && scene():
+        # value is the new position.
+        newPos = value.toPointF()
+        rect = scene()->sceneRect()
+        if !rect.contains(newPos):
+            # Keep the item inside the scene rect.
+            newPos.setX(qMin(rect.right(), qMax(newPos.x(), rect.left())))
+            newPos.setY(qMin(rect.bottom(), qMax(newPos.y(), rect.top())))
+            return newPos
+    return QGraphicsItem.itemChange(self, change, value)
+//! [15]
+
+
+//! [16]
+def setRadius(self, newRadius):
+    if radius != newRadius:
+        prepareGeometryChange()
+        radius = newRadius
+//! [16]
+
+
+//! [17]
+# Group all selected items together
+group = scene.createItemGroup(scene.selecteditems())
+
+# Destroy the group, and delete the group item
+scene.destroyItemGroup(group)
+//! [17]
+
+
+//! [QGraphicsItem type]
+class CustomItem(QGraphicsItem):
+    ...
+    self.Type = QGraphicsItem.UserType + 1
+
+    def type(self):
+       # Enable the use of qgraphicsitem_cast with this item.
+       return self.Type
+    ...
+//! [QGraphicsItem type]