Debugging QMLLoggingconsole.log can be used to print debugging information to the console. For example: Rectangle { width: 200; height: 200 MouseArea { anchors.fill: parent onClicked: console.log("clicked") } } Debugging TransitionsWhen 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 QML Viewer tool: to enable this, click on the "Debugging" menu, then "Slow Down Animations". Debugging module importsThe 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: import QtQuick 1.0 Rectangle { width: 100; height: 100 } If you set QML_IMPORT_TRACE=1 before running the QML Viewer (or your QML C++ application), you will see output similar to this: 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" Debugging with Qt CreatorQt 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. © 2008-2011 Nokia Corporation and/or its subsidiaries. Nokia, Qt and their respective logos are trademarks of Nokia Corporation in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. Privacy Policy Licensees holding valid Qt Commercial licenses may use this document in accordance with the Qt Commercial License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Nokia. Alternatively, this document may be used under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. |