qtcreator.qdoc

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/*!
    \contentspage{index.html}{Qt Creator}
    \page index.html
    \nextpage creator-overview.html

    \title Qt Creator Manual

    \section1 Version 2.1 (Draft)

    Qt Creator provides a cross-platform, complete integrated development
    environment (IDE) for application developers to create applications for
    multiple desktop and mobile device platforms. It is available for Linux,
    Mac OS X and Windows operating systems. For more information, see
    \l{Operating Systems and Supported Platforms}.

    \note Please report bugs and suggestions to the
    \l{http://bugreports.qt.nokia.com}{Qt Bug Tracker}.
    You can also join the Qt Creator mailing list. To subscribe,
    send a message with the word \e subscribe to
    \l{mailto:qt-creator-request@trolltech.com}
    {qt-creator-request@trolltech.com}. For more information about Qt mailing
    lists, visit \l{http://lists.trolltech.com}{http://lists.trolltech.com}.

    \raw HTML
    <img border="0" style="float:right;" src="images/qtcreator-screenshots.png" />
    \endraw

    \list
       \o \l{Introducing Qt Creator}
       \o \l{Operating Systems and Supported Platforms}
       \o \l{Qt Creator User Interface}
       \o \l{Getting Started}
           \list
               \o \l{Building and Running an Example Application}
               \o \l{Creating a Qt C++ Application}
               \o \l{Creating a Mobile Application with Nokia Qt SDK}
               \o \l{Creating a Qt Quick Application}
           \endlist
       \o \l{Managing Projects}
            \list
                \o \l{Creating a Project}
                \o \l{Setting Up a qmake Project}
                \o \l{Setting Up a CMake Project}
                \o \l{Setting Up a Generic Project}
                \o \l{Setting Up Development Environment for Maemo}
                \o \l{Setting Up Development Environment for Symbian}
                \o \l{Managing Sessions}
            \endlist
       \o \l{Using the Editor}
            \list
                \o \l{Finding and Replacing}
                \o \l{Refactoring}
                \o \l{Searching With the Locator}
                \o \l{Pasting and Fetching Code Snippets}
                \o \l{Configuring the Editor}
                \o \l{Using FakeVim Mode}
                \o \l{Using an External Editor}
            \endlist
       \o \l{Developing Application UI}
       \list
           \o \l{Optimizing Applications for Mobile Devices}
           \o \l{Adding Qt Designer Plugins}
           \if defined(qtquick)
           \o \l{Developing Qt Quick Applications}
                \list
                    \o \l {Creating Qt Quick Projects}
                    \o \l {Creating Components}
                    \o \l {Creating Screens}
                    \o \l {Animating Screens}
                    \o \l {Adding User Interaction Methods}
                    \o \l {Implementing Application Logic}
                \endlist
           \endif
       \endlist
       \o \l{Building and Running Applications}
            \list
                \o \l{Building for Multiple Targets}
                \o \l{Specifying Build Settings}
                \o \l{Specifying Run Settings}
                \o \l{Specifying Editor Settings}
                \o \l{Specifying Dependencies}
            \endlist

       \o \l{Debugging}
            \list
                \o \l{Debugging the Example Application}
                \o \l{Interacting with the Debugger}
                \o \l{Setting Up Debugger}
                \o \l{Using Debugging Helpers}
            \endlist
       \o \l{Using the Maemo Emulator}
       \o \l{Using Version Control Systems}

       \o \l{Getting Help}
       \o \l{Tips and Tricks}
       \o \l{Keyboard Shortcuts}
       \o \l{Known Issues}
       \o \l{Glossary}
       \o \l{Acknowledgements}
    \endlist
*/


/*!
    \contentspage index.html
    \previouspage index.html
    \page creator-overview.html
    \nextpage creator-os-supported-platforms.html

  \title Introducing Qt Creator

    Qt Creator is an integrated development environment (IDE) that provides you with
    tools to design and develop complex applications for multiple desktop and mobile
    platforms.

    \image qtcreator-overview.png "Qt Creator overview"

    \section1 Projects

    One of the major advantages of Qt Creator is that it allows a team of developers
    to share a project across different development platforms with a common tool
    for development and debugging.

    But why do you need projects? To be able to build and run applications,
    Qt Creator needs the same information as a compiler would need. This information
    is specified in the project build and run settings.

    Creating a project allows you to:

        \list

            \o Group files together

            \o Add custom build steps

            \o Include forms and resource files

            \o Specify settings for running applications

        \endlist

    You can either create a project from scratch or import an existing
    project. Qt Creator generates all the necessary files, depending on the type of
    project you create. For example, if you choose to create a graphical user
    interface (GUI) application, Qt Creator generates an empty .ui file
    that you can modify with the integrated \QD.

    Qt Creator is integrated with cross-platform systems for build automation: qmake and
    CMake. In addition, you can import generic projects that do not use qmake or CMake,
    and specify that Qt Creator ignores your build system.

    \section1 Editors

    Qt Creator comes with a code editor and an integrated \QD for designing and building
    graphical user interfaces (GUIs) from Qt widgets.

    \section2 Code Editor

    As an IDE, Qt Creator differs from a text editor in that it knows how to build and run
    applications. It understands the C++ and QML languages as code, not just as plain text. This allows
    it to:

    \list

        \o Enable you to write well formatted code

        \o Anticipate what you are going to write and complete the code

        \o Display inline error and warning messages

        \o Enable you to semantically navigate to classes, functions, and symbols

        \o Provide you with context-sensitive help on classes, functions, and symbols

        \o Rename symbols in an intelligent way, so that other symbols with the same name
         that belong to other scopes are not renamed

        \o Show you the locations in code where a function is declared or called

    \endlist

    \section2 UI Designer

    You can use \QD to compose and customize widgets or dialogs and test
    them using different styles and resolutions. Widgets and forms created with \QD are
    integrated seamlessly with programmed code,
    using the Qt signals and slots mechanism, that lets you easily assign behavior to
    graphical elements. All properties set in \QD can be changed dynamically within the code.
    Furthermore, features like widget promotion and custom plugins allow you to use your
    own widgets with \QD.

    \section1 Languages

    You can use the code editor to write code in Qt C++ or in the
    \l {http://doc.qt.nokia.com/4.7-snapshot/declarativeui.html}{QML} declarative
    programming language.

    \section2 QML

    You can use QML to build highly dynamic, custom user interfaces from a rich set
    of QML elements. Qt Quick helps programmers and designers collaborate to build the
    fluid user interfaces that are becoming common in portable consumer devices, such as
    mobile phones, media players, set-top boxes and netbooks.

    QML is an extension to JavaScript, that provides a mechanism to declaratively build
    an object tree of QML elements. QML improves the integration between JavaScript and
    Qt's existing QObject based type system, adds support for automatic property bindings
    and provides network transparency at the language level.

    \section1 Targets

    Qt Creator provides support for building and running Qt applications for
    desktop environment (Windows, Linux, and Mac OS) and mobile devices (Symbian, Maemo,
    and MeeGo). Build settings allow you to quickly switch between build targets.

    When you build an application for a mobile device target with a device
    connected to the development PC, Qt Creator generates an installation package,
    installs in on the device, and executes it.

    You can publish the installation packages on the \l{https://publish.ovi.com/info/}{Ovi Store}.
    For Symbian devices, the packages must be signed.

    \section1 Tools

    Qt Creator is integrated with a set of helpful tools, such as version control
    systems and Qt Simulator.

    \section2 Version Control Systems

    The recommended way to build a project is to use a version control system.
    Qt Creator uses the version control system's command line clients to access
    your repositories. The following version control systems are supported:

    \list

        \o Git

        \o Subversion

        \o Perforce

        \o CVS

        \o Mercurial

    \endlist

    The functions available to you in Qt Creator depend on the version control
    system. Basic functions are available for all the supported systems. They include
    comparing files with the latest versions stored in the repository and displaying the
    differences, viewing versioning history and change details, annotating files,
    and committing and reverting changes.

    \section2 Qt Simulator

    You can use the Qt Simulator to test Qt applications that are intended
    for mobile devices in an environment similar to that of the device. You
    can change the information that the device has about its configuration
    and environment.

    The Qt Simulator is installed as part of the Nokia Qt SDK. After it is
    installed, you can select it as a build target in Qt Creator.

    \section1 Debuggers

    Qt Creator does not include a debugger. It provides a debugger plugin that acts
    as an interface between the Qt Creator core and external native debuggers:

    \list

        \o GNU Symbolic Debugger (gdb)

        \o Microsoft Console Debugger (CDB)

        \o internal Java Script debugger

    \endlist

    Qt Creator displays the raw information provided by the native debuggers
    in a clear and concise manner with the goal to simplify the debugging process
    as much as possible without losing the power of the native debuggers.
    You can use the native debuggers to debug the C++ language.

    You can connect mobile devices to your development PC and debug processes
    running on the devices.

*/

/*!
    \contentspage index.html
    \previouspage creator-overview.html
    \page creator-os-supported-platforms.html
    \nextpage creator-quick-tour.html

    \title Operating Systems and Supported Platforms

    \section1 Operating Systems

    Qt Creator is available in binary packages for the following operating
    systems:
    \list
        \o Windows XP Service Pack 2
        \o Windows Vista
        \o (K)Ubuntu Linux 7.04 (32-bit and 64-bit) or later, with the following:
           \list
               \o g++
               \o make
               \o libglib2.0-dev
               \o libSM-dev
               \o libxrender-dev
               \o libfontconfig1-dev
               \o libxext-dev
               \o libfreetype6-dev
               \o libx11-dev
               \o libxcursor-dev
               \o libxfixes-dev
               \o libxft-dev
               \o libxi-dev
               \o libxrandr-dev
               \o If you are using QtOpenGL, libgl-dev and libglu-dev
           \endlist
        \o Mac OS 10.5 or later with the following:
           \list
               \o Xcode tools for your Mac OS X version available from your Mac
                  OS X installation DVDs or at \l http://developer.apple.com.
           \endlist
    \endlist

         \omit  ## Are the Xcode tools still needed separately? \endomit

    \section1 Build Environment

    To build Qt Creator itself from the source, you need:
    \list
        \o Qt 4.7 or later
        \o On Windows, MinGW 4.4 or Microsoft Visual Studio 2008
    \endlist

    \section1 Supported Mobile Device Platforms
    You can develop applications for the following mobile device
    platforms:

    \list

    \o Symbian

    \o Maemo and Maemo Application Development and Debugging Environment (MADDE)

    \endlist

    The following table summarizes operating system support for building
    applications for mobile device platforms.

    \table
        \header
            \o {1,3} Operating system
            \o {3,1} Platform
        \header
            \o Desktop
            \o Symbian
            \o Maemo
        \row
            \o Windows
            \o Yes
            \o Yes
            \o Yes
        \row
            \o Linux
            \o Yes
            \o No
            \o Yes
        \row
            \o Mac OS X
            \o Yes
            \o No
            \o No
    \endtable
*/


/*!
    \contentspage index.html
    \previouspage creator-os-supported-platforms.html
    \page creator-quick-tour.html
    \nextpage creator-getting-started.html

    \title Qt Creator User Interface

    \image qtcreator-breakdown.png

    When you start Qt Creator, it opens to the \gui Welcome mode, where you can:

    \list

        \o Open tutorials and example projects

        \o View tips and hints on using Qt Creator

        \o Create and open projects

        \o Send feedback to the development team

        \o Open recent sessions and projects

        \o Read news from the Qt labs

        \o Ask for support

    \endlist

    You can use the mode selector to change to another Qt Creator mode.

    Qt Creator has been localized into several languages. If the system language
    is one of the supported languages, it is automatically selected. To change
    the language, select \gui {Tools > Options > Environment} and select a language
    in the \gui Language field. The change takes effect after you restart Qt Creator.

    \section1 Qt Creator Modes

    The mode selector allows you to quickly switch between tasks such as
    editing project and source files, designing application UIs,
    configuring how projects are built and
    executed, and debugging your applications. To change modes, click the
    icons, or use the \l{keyboard-shortcuts}{corresponding keyboard shortcut}.

    You can use Qt Creator in the following modes:

    \list
        \o \gui{\l{Using the Editor}{Edit}} mode for editing project and source files.
        \o \gui{\l{Developing Application UI}{Design}} mode for designing and developing
           application user interfaces. This mode is available for UI files (.ui or
           .qml).
        \o \gui{\l{Debugging}{Debug}} mode for inspecting the state of your program while
           debugging.
        \o \gui{\l{Managing Projects}{Projects}} mode for configuring project building and
           execution. This mode is available when a project is open.
        \o \gui{\l{Getting Help}{Help}} mode for viewing Qt documentation.
    \endlist

    Certain actions in Qt Creator trigger a mode change. Clicking on
    \gui {Debug} > \gui {Start Debugging} > \gui {Start Debugging}
    automatically switches to \gui {Debug} mode.


    \section1 Browsing Project Contents

    The sidebar is available in the \gui Edit and \gui Debug modes.
    Use the sidebar to browse files, projects and bookmarks.
    \image qtcreator-sidebar.png

    You can select the content of the sidebar in the sidebar menu:
    \list
        \o \gui Projects shows a list of projects open in the current
           session.
        \o \gui{File System} shows the content of the currently selected
           directory.
        \o \gui Bookmarks shows all bookmarks for the current session.
        \o \gui{Open Documents} shows currently open files.
    \endlist

    You can change the view of the sidebar in the following ways:
    \list
        \o To toggle the sidebar, click \inlineimage qtcreator-togglebutton.png
           or press \key Alt+0 (\key Cmd+0 on Mac OS X).
        \o To split the sidebar, click \inlineimage qtcreator-splitbar.png
           . Select new content to view in the split view.
        \o To close a sidebar view, click
           \inlineimage qtcreator-closesidebar.png
           .
    \endlist


    \section2 Viewing Project Files

    The sidebar displays projects in a project tree. The project tree contains
    a list of all projects open in the current session. The files for each
    project are grouped according to their file type.

    You can use the project tree in the following ways:
    \list
        \o To bring up a context menu containing the actions most commonly
           needed right-click an item in the project tree.
           For example, through the menu of the project root directory you can,
           among other actions, build, re-build, clean and run the project.
        \o To list all files in a project, click
           \inlineimage qtcreator-filter.png
           and select \gui{Simplify tree}.
        \o To hide source files which are automatically generated by the build
           system, during a build, click \inlineimage qtcreator-filter.png
           and select \gui{Hide generated files}.
        \o To toggle the synchronization of your project tree with the file
           opened in the editor, click
           \inlineimage qtcreator-synchronizefocus.png
           .
        \o To see the absolute path of a file, move the mouse pointer over the
           file name.
    \endlist


    \section1 Viewing Output

    The task pane in Qt Creator can display one of the following panes:
    \list
       \o  \gui{Build Issues}
       \o  \gui{Search Results}
       \o  \gui{Application Output}
       \o  \gui{Compile Output}
       \o  \gui{General Messages}
       \o  \gui{Version Control}
    \endlist

    Output panes are available in all \l{Qt Creator modes}{modes}.
    Click the name of an output pane to open the pane. To maximize
    an open output pane, click the \gui {Maximize Output Pane} button
    or press \key {Alt+9}.

    To search within the \gui{Application Output} and \gui{Compile Output}
    panes, press \key {Ctrl+F} when the pane is active. Enter search
    criteria in the \gui Find field and click the left and right arrows to
    search down and up in the pane.

    To open the \gui{General Messages} and \gui{Version Control}
    panes, select \gui {Window > Output Panes}.


    \section2 Build Issues

    The \gui{Build Issues} pane provides a list of errors and warnings
    encountered during a build. The pane filters out irrelevant output from
    the build tools and presents the issues in an organized way.

    Right-clicking on a line brings up a context menu with options to copy
    the contents and to show a version control annotation view of the
    line that causes the error message.

    \image qtcreator-build-issues.png


    \section2 Search Results

    The \gui{Search Results} pane displays the results for global searches,
    for example, searching within a current document, files on disk, or all
    projects.

    The figure below shows an example search result for all
    occurrences of \c textfinder within the \c "/TextFinder" directory.

    \image qtcreator-search-pane.png


    \section2 Application Output

    The \gui{Application Output} pane displays the status of a program when
    it is executed, and the debug output.

    The figure below shows an example output from qDebug().

    \image qtcreator-application-output.png


    \section2 Compile Output

    The \gui{Compile Output} pane provides all output from the compiler.
    The \gui{Compile Output} is a more detailed version of information
    displayed in the \gui{Build Issues} pane.

    \image qtcreator-compile-pane.png

    \section1 Navigating with Keyboard

    Qt Creator caters not only to developers who are used to using the mouse,
    but also to developers who are more comfortable with the keyboard. A wide
    range of \l{keyboard-shortcuts}{keyboard} and
    \l{Searching With the Locator}{navigation} shortcuts are available to help
    speed up the process of developing your application.

*/


/*!
    \contentspage index.html
    \previouspage creator-version-control.html
    \page creator-help.html
    \nextpage creator-tips.html

    \title Getting Help

    Qt Creator comes fully integrated with Qt documentation and
    examples using the Qt Help plugin.
    \list
        \o To view documentation, switch to \gui Help mode.
        \o To obtain context sensitive help, move the text cursor to a Qt class
           or function and press \key F1. The documentation is displayed in a
           pane next to the code editor, or, if there is not enough vertical
           space, in the fullscreen \gui Help mode.

           \image qtcreator-context-sensitive-help.png

        \o To select and configure how the documentation is displayed in the
           \gui Help mode, select \gui Tools > \gui Options... > \gui Help.
    \endlist

    \section1 Adding External Documentation

    You can display external documentation in the \gui Help mode.
    To augment or replace the documentation that ships with Qt Creator and Qt:
    \list 1
        \o Create a .qch file from your documentation.

           For information on how to prepare your documentation and create a
           .qch file, see
           \l{http://doc.qt.nokia.com/4.6/qthelp-framework.html}{The Qt Help Framework}.
        \o To add the .qch file to Qt Creator, select \gui Tools >
           \gui Options... > \gui Help > \gui Documentation > \gui Add.
    \endlist

    \section1 Using Documentation Filters

    You can filter the documents displayed in the \gui Help mode to find
    relevant information faster. Select from a list of filters in the
    \gui {Filtered by} field. The contents of the \gui Index and \gui Contents
    pane in the sidebar change accordingly.

    \image qtcreator-help-filters.png "Help filters"

    You can modify the filters to include external documentation, for example,
    or you can define your own filters. To construct filters, you can use the
    filter attributes that are specified in the documentation. Each document
    contains at least one filter attribute. If several documents contain the
    same filter attribute, such as \c tools, you can use that attribute to
    include all those documents.

    To add filters:

    \list 1

        \o Select \gui {Tools > Options... > Help > Filters > Add}.

        \o Enter a name for the filter and press \gui {OK}.

        \o In \gui Attributes, select the documents that you want to include
        in the filter.

        \image qtcreator-help-filter-attributes.png "Help filter attributes"

        \o Click \gui OK.

        \o In the \gui Help mode, select the filter in the \gui {Filtered by}
        field to see the filtered documentation in the sidebar.

    \endlist

    To modify filters, select a filter in \gui Filters, select the attributes,
    and then click \gui Apply.

    To remove filters, select them in \gui Filters, and click \gui Remove.

*/


/*!
    \contentspage index.html
    \previouspage creator-editor-external.html
    \page creator-design-mode.html
    \nextpage creator-usability.html

    \title Developing Application UI

    You can use the integrated \QD to design and build graphical user interfaces (GUIs) from
    Qt widgets. You can compose and customize your widgets or dialogs and test
    them using different styles and resolutions.

    Widgets and forms created with \QD are integrated seamlessly with programmed code,
    using the Qt signals and slots mechanism, that lets you easily assign behavior to
    graphical elements. All properties set in \QD can be changed dynamically within the code.
    Furthermore, features like widget promotion and custom plugins allow you to use your
    own widgets with \QD.

    UIs that use widgets are clearly structured and enforce a platform look and feel,
    which makes them useful for traditional applications. However, they are static, and
    do not fully make use of the large high-resolution screens, touch input, and significant
    graphics power that are becoming common in portable consumer devices, such as mobile
    phones, media players, set-top boxes, and netbooks.

    You can easily develop animations by using a declarative programming
    language called \l {http://doc.qt.nokia.com/4.7-snapshot/declarativeui.html}{QML}.
    In QML, a user interface is specified as a tree of objects with properties.
    You can edit QML code in the code editor. You
    can use Qt or JavaScript to implement the application logic.

    The integration includes project management and code completion.

    \section1 Using Qt Designer

    Qt Creator automatically opens all .ui files in \QD.

    \image qtcreator-formedit.png

    To change the layout of \QD user interface elements:
    \list 1
        \o Select \gui Tools > \gui{Form Editor} > \gui Views >
           \gui Locked.

           When this option is unchecked, you can change the layout.
        \o Click the header of an element and drag the element to a new
           position.
    \endlist

    To change \QD properties, select \gui Tools > \gui Options... >
    \gui Designer.
    \list
        \o Set the class properties and code generation preferences in \gui
           {Class Generation}.
        \o Set an additional folder for saving templates in \gui{Template
           Paths}.
        \o Set the grid settings and preview preferences in \gui Forms. To
           preview your form with skins, enable \gui{Print/Preview
           Configuration} and select your skin. Otherwise default preview
           settings are used.

           To preview the settings, select \gui Tools > \gui{Form Editor} >
           \gui Preview, or press \key Ctrl+Alt+R.
        \o To specify embedded device profiles, such as style, font, and screen
           resolution, select \gui{Embedded Design}.
    \endlist

    For more information on \QD, see
    \l{http://doc.qt.nokia.com/4.7-snapshot/designer-manual.html}{Qt Designer Manual}.

    \section1 Using Qt Quick Designer

    You can edit .qml files in the visual \QMLD editor or in the
    code editor.

    In \gui Projects, double-click a .qml file to open it in the code
    editor. Then select the \gui {Design} mode to edit the file in the
    visual editor.

    \note The visual \QMLD editor is provided as an experimental plugin that you must
    enable to be able to edit QML files in the \gui Design mode. Enabling the
    visual editor can negatively affect the overall stability of Qt Creator.

    To enable or disable the \QMLD visual editor, select
    \gui {Help > About Plugins... > Qt Quick > QmlDesigner}. You must restart Qt Creator
    to enable or disable the visual editor.

    \image qmldesigner-visual-editor.png "Visual editor"

    Use the visual editor panes to manage your project:

    \list

    \o \gui {Navigator} pane displays the items in the scene. You can
    show and hide items to focus on specific parts of the application.

    \o \gui {Library} pane displays lists of predefined \gui {Items} and
    imported \gui {Resources} that you can use to design applications. The
    images and other files that you copy to the project folder appear in the
    \gui {Resources} pane.

    \o \gui {Properties} pane displays the properties of the selected component.
     You can also change the properties in the code editor.

    \o \gui {State} pane displays the different states of the component. To add
    states, click the empty slot. Then modify the new state in the editor.
    In the code editor, you can see the changes recorded as changes to
    the base state.

    \endlist

*/


/*!
    \contentspage index.html
    \previouspage creator-project-managing-sessions.html
    \page creator-editor-using.html
    \nextpage creator-editor-finding.html

    \title Using the Editor

    Qt Creator's code editor is designed to aid you in creating, editing and
    navigating code.  Qt Creator's code editor is fully equipped with syntax
    checking, code completion, context sensitive help and in-line error
    indicators while you are typing.

    \section1 Using the Editor Toolbar

    The editor toolbar is located at the top of the editor view. The editor
    toolbar is context sensitive and shows items relevant to the file currently
    open in the editor.

    \image qtcreator-editortoolbar-symbols.png

    Use the toolbar to navigate between open files and symbols in use.
    To browse forward or backward through your location history, click
           \inlineimage qtcreator-back.png
           and \inlineimage qtcreator-forward.png
           .

    To go to any open file, select it from the \gui{Open files} drop-down menu.
    Right-click the menu title and select \gui {Copy Full Path to Clipboard} to
    copy the path and name of the current file to the clipboard.

    To jump to any symbol used in the current file, select it from the
    \gui Symbols drop-down menu. By default, the symbols are displayed in the
    order in which they appear in the file. Right-click the menu title and select
    \gui {Sort Alphabetically} to arrange the symbols in alphabetic order.


    \section1 Splitting the Editor View

    Split the editor view when you want to work on and view multiple files on
    the same screen.

    \image qtcreator-spliteditorview.png

    You can split the editor view in the following ways:
    \list
        \o To split the editor view into a top and bottom view, select
           \gui Window > \gui Split or press \key{Ctrl+E, 2}.

           Split command creates views below the currently active editor view.
        \o To split the editor view into adjacent views, select
           \gui Window > \gui{Split Side by Side} or press
           \key{Ctrl+E, 3}.

           Side by side split command creates views to the right of the
           currently active editor view.
    \endlist

    To move between split views, select \gui Window >
    \gui{Go to Next Split} or press \key{Ctrl+E, O}.

    To remove a split view, place the cursor within the view you want to
    remove and select \gui Window > \gui{Remove Current Split} or press
    \key{Ctrl+E, 0}. To remove all but the currently selected split view,
    select \gui Window > \gui{Remove All Splits} or press \key{Ctrl+E, 1}.


    \section1 Highlighting and Folding Blocks

    Use block highlighting to visually separate parts of the code that belong
    together. For example, when you place the cursor within the braces,
    the code enclosed in braces is highlighted.

    \image qtcreator-blockhighlighting.png

    To enable block highlighting, select \gui Tools > \gui{Options...} >
    \gui{Text Editor} > \gui Display > \gui{Highlight blocks}.

    Use the folding markers to collapse and expand blocks of code within
    braces. Click the folding marker to collapse or expand a block. In the
    figure above, the folding markers are located between the line number and
    the text pane.

    To show the folding markers, select \gui Tools > \gui{Options...} >
    \gui{Text Editor} > \gui Display > \gui{Display folding markers}. This
    option is enabled by default.

    When the cursor is on a brace, the matching brace is animated
    by default. To turn off the animation and just highlight the block and
    the braces, select \gui {Tools > Options... > Text Editor > Display} and
    deselect \gui {Animate matching parentheses}.


    \section1 Checking Code Syntax

    As you write code Qt Creator checks code syntax. When Qt Creator spots a
    syntax error in your code it underlines it and shows error details when you
    move the mouse pointer over the error.
    \list
        \o Syntax errors are underlined in red.

           In the following figure, a semicolon is missing at the end of the
           line.

           \image qtcreator-syntaxerror.png
        \o Semantic errors and warnings are underlined in olive.

           In the following figure, the type is unknown.

           \image qtcreator-semanticerror.png
    \endlist


    \section1 Completing Code

    Qt Creator understands the code as code, not just as plain text. This
    allows it to help you to write well formatted code and to anticipate
    what you are going to write and complete the code.
    The code completion differs somewhat depending on whether you write Qt code or QML code.

    \section2 Completing Qt Code

    As you write code, Qt Creator provides a list of context-sensitive
    suggestions to the statement currently under your cursor.

    \image qtcreator-codecompletion.png

    To open the list of suggestions at any time, press \key{Ctrl+Space}.
    If only one option is available, Qt Creator inserts it automatically.

    When completion is invoked manually, Qt Creator completes the common prefix
    of the list of suggestions. This is especially useful for classes with
    several similarly named members. To disable this functionality, uncheck
    \gui{Autocomplete common prefix} in the code completion preferences.
    Select \gui Tools > \gui{Options...} > \gui{Text Editor} > \gui Completion.

    By default, code completion considers only the first letter case-sensitive.
    To apply full or no case-sensitivity, select the option in the
    \gui {Case-sensitivity} field.

    The following table lists available types for code completion and icon
    used for each.

    \table
        \header
            \o Icon
            \o Description
        \row
            \i  \inlineimage completion/class.png
            \i  A class
        \row
            \i  \inlineimage completion/enum.png
            \i  An enum
        \row
            \i  \inlineimage completion/enumerator.png
            \i  An enumerator (value of an enum)
        \row
            \i  \inlineimage completion/func.png
            \i  A function
        \row
            \i  \inlineimage completion/func_priv.png
            \i  A private function
        \row
            \i  \inlineimage completion/func_prot.png
            \i  A protected function
        \row
            \i  \inlineimage completion/var.png
            \i  A variable
        \row
            \i  \inlineimage completion/var_priv.png
            \i  A private variable
        \row
            \i  \inlineimage completion/var_prot.png
            \i  A protected variable
        \row
            \i  \inlineimage completion/signal.png
            \i  A signal
        \row
            \i  \inlineimage completion/slot.png
            \i  A slot
        \row
            \i  \inlineimage completion/slot_priv.png
            \i  A private slot
        \row
            \i  \inlineimage completion/slot_prot.png
            \i  A protected slot
        \row
            \i  \inlineimage completion/keyword.png
            \i  A keyword
        \row
            \i  \inlineimage completion/macro.png
            \i  A macro
        \row
            \i  \inlineimage completion/namespace.png
            \i  A namespace
    \endtable

    \section2 Completing QML Code

    As you write QML code, Qt Creator suggests properties, IDs, and code
    snippets to complete the code. The snippets can consist of multiple
    fields that you specify values for. Select an item in the list and press
    \key Tab or \key Enter to complete the code. Press \key Tab to
    move between the fields and specify values for them.

    \image qmldesigner-code-completion.png "Completing QML code"

    \section1 Using Bookmarks

    To insert or delete a bookmark right-click the line number and select
    \gui{Toggle Bookmark} or press \key{Ctrl+M}.

    \image qtcreator-togglebookmark.png

    To go to previous bookmark in the current session, press \key{Ctrl+,}.

    To go to next bookmark in the current session, press \key{Ctrl+.}.


    \section1 Moving to Symbol Definition or Declaration