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authorQt by Nokia <qt-info@nokia.com>2011-04-27 12:05:43 +0200
committeraxis <qt-info@nokia.com>2011-04-27 12:05:43 +0200
commit885735d011472bcfbb96e688d9e64553d7fe9d4b (patch)
tree734963625eba643bf11bc4870a4c407809a6400a /doc/src/declarative/qdeclarativedebugging.qdoc
Initial import from the monolithic Qt.
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Free Documentation License
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of this
+** file.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+\page qdeclarativedebugging.html
+\title Debugging QML
+
+\section1 Logging
+
+\c console.log can be used to print debugging information to the console. For example:
+
+\qml
+Rectangle {
+ width: 200; height: 200
+ MouseArea {
+ anchors.fill: parent
+ onClicked: console.log("clicked")
+ }
+}
+\endqml
+
+\section1 Debugging Transitions
+
+When a transition doesn't look quite right, it can be helpful to view it in slow
+motion to see what is happening more clearly. This functionality is supported
+in the \l {QML Viewer} tool: to enable this,
+click on the "Debugging" menu, then "Slow Down Animations".
+
+
+\section1 Debugging module imports
+
+The \c QML_IMPORT_TRACE environment variable can be set to enable debug output
+from QML's import loading mechanisms.
+
+For example, for a simple QML file like this:
+
+\qml
+import QtQuick 1.0
+
+Rectangle { width: 100; height: 100 }
+\endqml
+
+If you set \c {QML_IMPORT_TRACE=1} before running the \l {QML Viewer}
+(or your QML C++ application), you will see output similar to this:
+
+\code
+QDeclarativeImportDatabase::addImportPath "/qt-sdk/imports"
+QDeclarativeImportDatabase::addImportPath "/qt-sdk/bin/QMLViewer.app/Contents/MacOS"
+QDeclarativeImportDatabase::addToImport 0x106237370 "." -1.-1 File as ""
+QDeclarativeImportDatabase::addToImport 0x106237370 "Qt" 4.7 Library as ""
+QDeclarativeImportDatabase::resolveType "Rectangle" = "QDeclarativeRectangle"
+\endcode
+
+
+\section1 Debugging with Qt Creator
+
+\l{http://qt.nokia.com/products/developer-tools}{Qt Creator} provides built-in
+support for QML debugging. QML projects and standalone C++ applications that
+utilize QML can be debugged on desktops as well as on remote devices.
+For more information, see the Qt Creator Manual.
+
+*/