From 4ce41d7fdcb07b515f9466c8d532b7f737aa24c9 Mon Sep 17 00:00:00 2001 From: Gunnar Sletta Date: Thu, 26 Nov 2015 11:28:07 +0100 Subject: docfix: Make it clearer how Context2D relates to Canvas Change-Id: Id64aff29ef8bc7cbb4f7fc46b1a0d30a47585055 Reviewed-by: Mitch Curtis --- src/quick/items/context2d/qquickcanvasitem.cpp | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/quick/items/context2d/qquickcanvasitem.cpp b/src/quick/items/context2d/qquickcanvasitem.cpp index 6ef2d6123b..f0a56867f1 100644 --- a/src/quick/items/context2d/qquickcanvasitem.cpp +++ b/src/quick/items/context2d/qquickcanvasitem.cpp @@ -222,6 +222,9 @@ QQuickCanvasItemPrivate::~QQuickCanvasItemPrivate() operations. The Canvas output may be saved as an image file or serialized to a URL. + Rendering to the Canvas is done using a Context2D object, usually as a + result of the \l paint signal. + To define a drawing area in the Canvas item set the \c width and \c height properties. For example, the following code creates a Canvas item which has a drawing area with a height of 100 pixels and width of 200 pixels: @@ -231,6 +234,11 @@ QQuickCanvasItemPrivate::~QQuickCanvasItemPrivate() id: mycanvas width: 100 height: 200 + onPaint: { + var ctx = getContext("2d"); + ctx.fillStyle = Qt.rgba(1, 0, 0, 1); + ctx.fillRect(0, 0, width, height); + } } \endqml -- cgit v1.2.3