Doc: Remove references to Qt 4 and < Qt 5.15

Leave only mentions to things visible in the UI and
to compatibility functions.

Fixes: QTCREATORBUG-30883
Change-Id: Id63d791f79363c2f4c2602bb8c0ed656a9ceab29
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

doc/qtcreator/src/analyze/creator-ctf-visualizer.qdoc

@@ -113,7 +113,7 @@
     LTTng is a tracing toolkit for Linux that you can apply on embedded Linux
     systems to find out how to optimize the startup time of an application.
 
-    Since Qt 5.13, Qt has a set of kernel trace points and a tracing
+    Qt has a set of kernel trace points and a tracing
     subsystem for custom user space trace points.
 
     \section2 Configuring the Kernel

doc/qtcreator/src/android/androiddev.qdoc

@@ -131,22 +131,24 @@
     C:\Users\Username\AppData\Local\QtProject\qtcreator\android\sdk_definitions.json
     \endcode
 
-    For example, the SDK configuration file sets the NDK version 19.2.5345600
+    For example, the SDK configuration file sets the NDK version 22.1.7171670
-    for use with Qt 5.12.0 to 5.12.5 and Qt 5.13.0 to 5.13.1:
+    for use with Qt 6.3, Qt 6.2, and Qt 5.15.9 to 5.15.20:
 
     \badcode
     "specific_qt_versions": [
-        {
+    {       "versions": ["6.3", "6.2", "5.15.[9-20]"],
-            "versions": ["5.12.[0-5]", "5.13.[0-1]"],
+            "sdk_essential_packages": ["build-tools;31.0.0", "ndk;22.1.7171670"]
-            "sdk_essential_packages": ["build-tools;28.0.2", "ndk;19.2.5345600"],
+        },
-            "ndk_path": "ndk/19.2.5345600"
-        }
     ]
     \endcode
 
     You can view the latest version of the configuration file that is up-to-date
     with the Android SDK and NDK changes, \l{sdk_definitions.json}, in Git.
 
+    \note For Qt 6.5 or later, \QC reads the NDK version that was used for
+    building Qt from \c modules/Core.json and uses it instead of the version
+    in \c sdk_definitions.json.
+
     \sa {Android}{How To: Develop for Android},
     {Developing for Android}
 */

doc/qtcreator/src/debugger/qtquick-debugging.qdoc

@@ -25,10 +25,6 @@
     information about the state of the UI, and inspect QML properties and
     JavaScript variables, as well as change their values temporarily at runtime.
 
-    \if defined(qtcreator)
-    \note You need Qt 5.0 or later to debug Qt Quick projects.
-    \endif
-
     For an example of how to debug Qt Quick Projects, see
     \l{Debugging a Qt Quick Application}.
 
@@ -86,7 +82,7 @@
             rebuild the project.
 
         \li To debug applications on \l{glossary-device}{devices}, check that
-            Qt 5.0, or later, libraries are installed on the device and
+            Qt libraries are installed on the device and
             \l{Run on many platforms}{select the corresponding kit for the device}
             before you start debugging.
 
@@ -250,12 +246,6 @@
     application to jump to their definitions in the code. The properties of the
     selected item are displayed in the \uicontrol {Locals} view.
 
-    \if defined(qtcreator)
-    The \uicontrol Select tool will be enabled either if your application is
-    using Qt 5.7 or later, or if your application is using an earlier version
-    of Qt and is based on the \c QQuickView class.
-    \endif
-
     You can also view the item hierarchy in the running application:
 
     Double-click an item in the running application to cycle through the item

doc/qtcreator/src/editors/creator-only/creator-coding-edit-mode.qdoc

@@ -417,18 +417,18 @@
 
     \image qtcreator-options-texteditor-behavior-file-encodings.png {File encoding preferences}
 
-    Qt 5 and Qt 6 require UTF-8 encoded source files, and therefore the default
+    Qt requires UTF-8 encoded source files, and therefore the default
     encoding is set to \uicontrol UTF-8.
-    Detecting the correct encoding is tricky, so \QC will not try to do so.
+
-    Instead, it displays the following error message when you try to edit a file
+    If you try to edit a file that is not UTF-8 encoded, you see the following
-    that is not UTF-8 encoded: \uicontrol {Error: Could not decode "filename" with
+    error message: \uicontrol {Error: Could not decode "filename" with
     "UTF-8"-encoding. Editing not possible.}
 
     To resolve the issue, use a file conversion tool to convert the file
-    encoding to UTF-8 when developing Qt 5 applications. Otherwise, conversion
+    encoding to UTF-8. Otherwise, conversion of string constants to
-    of string constants to QString might not work as expected.
+    QString might not work as expected.
 
-    If you develop only Qt 4 applications or other than Qt applications, you
+    If you do not develop Qt applications, you
     can set other encoding options as the default encoding. Select the
     \uicontrol System option to use the file encoding used by your system.
 

doc/qtcreator/src/howto/creator-only/creator-autotest.qdoc

@@ -849,8 +849,7 @@
 
     \section1 Blacklisting Tests
 
-    Since Qt 5.4, you can add a BLACKLIST file for tests. It is mainly used
+    A BLACKLIST file for tests is mainly used internally by the Qt CI system.
-    internally by the Qt CI system.
 
     \table
         \header

doc/qtcreator/src/howto/creator-only/qtcreator-faq.qdoc

@@ -121,14 +121,10 @@
     \b {The Qt API Reference Documentation is missing and context help does
     not find topics. What can I do?}
 
-    \QC comes fully integrated with Qt documentation and examples using
+    Install a Qt version and Qt documentation with \QOI.
-    the Qt Help plugin. The integrated Qt Reference Documentation is available
-    for Qt 4.4 and later. \QC and other Qt deliverables have
-    documentation as .qch files. All the documentation is accessible in the
-    \uicontrol Help mode.
 
-    To view the documentation that is available and to add documentation,
+    To view the installed documentation (.qch files) and to add documentation,
-    select \preferences > \uicontrol Help >
+    go to \preferences > \uicontrol Help >
     \uicontrol Documentation. For more information, see
     \l{Add external documentation}.
 

doc/qtcreator/src/ios/creator-ios-dev.qdoc

@@ -16,8 +16,8 @@
     the necessary \l{Kits}{kits} to build applications for and run them on
     configured iOS devices.
 
-    You only need Qt libraries that are built for iOS. You can install them as
+    You only need Qt libraries that are built for iOS. You can install Qt for iOS
-    part of Qt 5.2, or later.
+    with \QOI.
 
     \section1 iOS 17 Devices
 

doc/qtcreator/src/overview/creator-only/creator-desktop-platforms.qdoc

@@ -45,8 +45,7 @@
         \li libxft-dev
         \li libxi-dev
         \li libxrandr-dev
-        \li libgl-dev and libglu-dev if you use Qt OpenGL (deprecated
+        \li libgl-dev and libglu-dev if you use Qt GUI OpenGL functions
-            in Qt 5) or Qt GUI OpenGL functions
     \endlist
 
     \section1 macOS

doc/qtcreator/src/qtquick/creator-only/qtquick-creating.qdoc

@@ -149,8 +149,7 @@
             imports that are used in the QML files.
 
             You can add imports later to combine Qt Quick basic types with
-            Qt Quick Controls, Qt Quick Dialogs, and Qt Quick Layouts (available
+            Qt Quick Controls, Qt Quick Dialogs, and Qt Quick Layouts.
-            since Qt 5.1).
 
         \li Select the \uicontrol {Use Qt Virtual Keyboard} check box to add
             support for \l{Qt Virtual Keyboard} to the application.

doc/qtcreator/src/qtquick/qtquick-profiler.qdoc

@@ -261,33 +261,24 @@
     of the code the event is associated with.
 
     The following types of events are displayed in the timeline view on one or
-    several rows. The availability of event types depends on the Qt version that
+    several rows.
-    you build the application with and the Qt Quick version you use.
 
     \table
 
     \header
         \li Event Category
         \li Description
-        \li Minimum Qt Version
-        \li Qt Quick Version
-
     \row
         \li \uicontrol {Pixmap Cache}
         \li Displays the general amount of pixmap data cached, in pixels. In
             addition, displays a separate event for each picture being loaded,
             with specifics about its file name and size.
-        \li Qt 5.1
-        \li Qt Quick 2
 
     \row
         \li \uicontrol {Scene Graph}
         \li Displays the time when scene graph frames are rendered and some
             additional timing information for the various stages executed to do
             so.
-        \li Qt 5.1
-        \li Qt Quick 2
-
     \row
         \li \uicontrol {Memory Usage}
         \li Displays block allocations of the JavaScript memory manager.
@@ -300,82 +291,49 @@
             The second row displays the actual usage of the allocated memory.
             This is the amount of JavaScript heap the application has actually
             requested.
-        \li Qt 5.4
-        \li Qt Quick 2
-
     \row
         \li \uicontrol {Input Events}
         \li Displays mouse and keyboard events.
-        \li Qt 4.7.4
-        \li Qt Quick 1 or Qt Quick 2
-
     \row
         \li \uicontrol Painting
-        \li Displays the time spent painting the scene for each frame.
+        \li Not used.
-        \li Qt 4.7.4
-        \li Qt Quick 1
-
     \row
         \li \uicontrol Animations
         \li Displays the amount of animations that are active and the frame
             rate that they are running at.
-            Information about render thread animations is displayed for
+            Render thread animations are shown on a separate row.
-            applications that are built with Qt 5.3 or later. Render thread
-            animations are shown in a separate row then.
-        \li Qt 5.0 (Qt 5.3)
-        \li Qt Quick 2
-
     \row
         \li \uicontrol Compiling
         \li Displays the time spent compiling the QML files.
-        \li Qt 4.7.4
-        \li Qt Quick 1 or Qt Quick 2
-
     \row
         \li \uicontrol Creating
-        \li Displays the time spent creating the elements in the scene. In Qt
+        \li Displays the time spent creating the elements in the scene.
-            Quick 2, creation of elements takes place in two stages. The first
+            The creation of elements takes place in two stages. The first
             stage is for the creation of the data structures, including child
             elements. The second stage represents the completion callbacks. Not
             all elements trigger completion callbacks, though. The stages are
             shown as separate events in the timeline.
-            For Qt Quick 2 applications compiled with versions of Qt before
-            5.2.1 only the creation of top-level elements is shown, as single
-            events.
-        \li Qt 4.7.4 (Qt 5.2.1)
-        \li Qt Quick 1 or Qt Quick 2
-
     \row
         \li \uicontrol Binding
         \li Displays the time when a binding is evaluated and how long the
             evaluation takes.
-        \li Qt 4.7.4
-        \li Qt Quick 1 or Qt Quick 2
-
     \row
         \li \uicontrol {Handling Signal}
         \li Displays the time when a signal is handled and how long the
             handling takes.
-        \li Qt 4.7.4
-        \li Qt Quick 1 or Qt Quick 2
-
     \row
         \li \uicontrol JavaScript
         \li Displays the time spent executing the actual JavaScript behind
             bindings and signal handlers. It lists all the JavaScript functions
             you may be using to evaluate bindings or handle signals.
-        \li Qt 5.3
-        \li Qt Quick 2
-
     \row
         \li \uicontrol Quick3D
         \li Displays the time spent rendering Qt Quick 3D frames, timing information
             for frame preparation and synchronization, particle system update times
             and particle update count, as well as texture and mesh memory allocations
             and memory consumption.
-        \li Qt 6.3
-        \li Qt Quick 3D
 
+            This event type is available since Qt 6.3.
     \endtable
 
     \section2 Analyzing Scene Graph Events
@@ -399,7 +357,6 @@
         \li Render Loop Types
         \li Label in output of QSG_RENDER_TIMING
         \li Description
-        \li Caveats
     \row
         \li \uicontrol {Polish}
         \li GUI
@@ -407,8 +364,6 @@
         \li polish
         \li Final touch-up of items before they are rendered using
             QQuickItem::updatePolish().
-        \li Versions of Qt prior to Qt 5.4 record no polish times for the basic
-            render loop and incorrect ones for the windows render loop.
     \row
         \li \uicontrol {GUI Thread Wait}
         \li GUI
@@ -419,14 +374,12 @@
             the same mutex at \uicontrol {GUI Thread Sync}. If this starts long
             before \uicontrol {Render Thread Sync}, there is \e free  time in the GUI
             thread you could be using for running additional QML or JavaScript.
-        \li None
     \row
         \li \uicontrol {GUI Thread Sync}
         \li GUI
         \li Threaded
         \li blockedForSync
         \li The time the GUI thread is blocked, waiting for the render thread.
-        \li None
     \row
         \li \uicontrol {Animations}
         \li GUI
@@ -437,7 +390,6 @@
             animation events will be shown when using the basic render loop.
             Watch the \uicontrol {Animations} category to see animation timing in
             this case.
-        \li None
     \row
         \li \uicontrol {Render Thread Sync}
         \li Render
@@ -445,7 +397,6 @@
         \li Frame rendered ... sync
         \li Synchronizing the QML state into the scene graph using
             QQuickItem::updatePaintNode().
-        \li None
     \row
         \li \uicontrol {Render}
         \li Render
@@ -455,20 +406,12 @@
             uploading all the necessary data to the GPU. This is the \e gross
             render time. Do not confuse it with the \e net \uicontrol{Render Render}
             time below.
-        \li With versions of Qt prior to Qt 5.5, the gross render time and the
-            below breakup of render times may be misaligned by some
-            microseconds due to different, unsynchronized timers being used to
-            measure them. For example \uicontrol {Render Preprocess} might seem to
-            start before \uicontrol {Render Thread Sync} is finished.
     \row
         \li \uicontrol {Swap}
         \li Render
         \li Threaded, Basic, Windows
         \li Frame rendered ... swap
         \li Swapping frames after rendering.
-        \li The output of swap times triggered by setting QSG_RENDER_TIMING is
-            incorrect for the basic render loop and versions of Qt prior to
-            Qt 5.4. QML Profiler shows the correct swap times.
     \row
         \li \uicontrol {Render Preprocess}
         \li Render
@@ -476,8 +419,6 @@
         \li time in renderer ... preprocess
         \li Calling QSGNode::preprocess() on all nodes that need to be
             preprocessed. This is part of the gross \uicontrol {Render} step.
-        \li May not be properly aligned with \uicontrol {Render} with versions of Qt
-            prior to Qt 5.5.
     \row
         \li \uicontrol {Render Update}
         \li Render
@@ -489,8 +430,6 @@
             with state from the GUI thread. In \uicontrol {Render Update}, all the
             nodes are combined to create the final scene. This is part of the
             gross \uicontrol {Render} step.
-        \li May not be properly aligned with \uicontrol {Render} with versions of Qt
-            prior to Qt 5.5.
     \row
         \li \uicontrol {Render Bind}
         \li Render
@@ -498,8 +437,6 @@
         \li time in renderer ... binding
         \li Binding the correct framebuffer for OpenGL rendering. This is part
             of the gross \uicontrol {Render} step.
-        \li May not be properly aligned with \uicontrol {Render} with versions of Qt
-            prior to Qt 5.5.
     \row
         \li \uicontrol {Render Render}
         \li Render
@@ -507,38 +444,30 @@
         \li time in renderer ... rendering
         \li The actual process of sending all the data to the GPU via OpenGL.
             This is part of the gross \uicontrol {Render} step.
-        \li May not be properly aligned with \uicontrol {Render} with versions of Qt
-            prior to Qt 5.5.
     \row
         \li \uicontrol {Material Compile}
         \li Render
         \li Threaded, Basic, Windows
         \li shader compiled
         \li Compiling GLSL shader programs.
-        \li None
     \row
         \li \uicontrol {Glyph Render}
         \li Render
         \li Threaded, Basic, Windows
         \li glyphs ... rendering
         \li Rendering of font glyphs into textures.
-        \li Versions of Qt prior to Qt 5.4 report incorrect times for these
-            events.
     \row
         \li \uicontrol {Glyph Upload}
         \li Render
         \li Threaded, Basic, Windows
         \li glyphs ... upload
         \li Uploading of glyph textures to the GPU.
-        \li Versions of Qt prior to Qt 5.4 report incorrect times for these
-            events.
     \row
         \li \uicontrol {Texture Bind}
         \li Render
         \li Threaded, Basic, Windows
         \li plain texture ... bind
         \li Binding a texture in the OpenGL context using glBindTextures.
-        \li None
     \row
         \li \uicontrol {Texture Convert}
         \li Render
@@ -546,35 +475,30 @@
         \li plain texture ... convert
         \li Converting the format and downscaling an image to make it suitable
             for usage as a texture.
-        \li None
     \row
         \li \uicontrol {Texture Swizzle}
         \li Render
         \li Threaded, Basic, Windows
         \li plain texture ... swizzle
         \li Swizzling the texture data on the CPU if necessary.
-        \li None
     \row
         \li \uicontrol {Texture Upload}
         \li Render
         \li Threaded, Basic, Windows
         \li plain texture ... upload / atlastexture uploaded
         \li Uploading the texture data to the GPU.
-        \li None
     \row
         \li \uicontrol {Texture Mipmap}
         \li Render
         \li Threaded, Basic, Windows
         \li plain texture ... mipmap
         \li Mipmapping a texture on the GPU.
-        \li None
     \row
         \li \uicontrol {Texture Delete}
         \li Render
         \li Threaded, Basic, Windows
         \li plain texture deleted
         \li Deleting a texture from the GPU that became unnecessary.
-        \li None
     \endtable
 
     \section2 Analyzing Qt Quick 3D Events
@@ -676,9 +600,6 @@
     To copy the contents of one view or row to the clipboard, select
     \uicontrol {Copy Table} or \uicontrol {Copy Row} in the context menu.
 
-    JavaScript events are shown in the \uicontrol Statistics view only for applications
-    that use Qt Quick 2 and are built with Qt 5.3 or later.
-
     \section2 Visualizing Statistics as Flame Graphs
 
     The \uicontrol {Flame Graph} view shows a more concise statistical overview