Doc: Create separate topic for dummy QML data

There is now a collection topic for methods for
simulating data in the Qt Design Studio Manual.
Move information about creating dummy QML models
there.

Change-Id: Id15998b172169a7d714250350f6f627b998ad9e8
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

doc/qtcreator/src/qtcreator-toc.qdoc

@@ -104,6 +104,7 @@
                         \li \l{Specifying Item Properties}
                         \li \l{Using Custom Fonts}
                         \li \l{Annotating Designs}
+                        \li \l{Loading Placeholder Data}
                         \li \l{Qt Quick UI Forms}
                    \endlist
                 \li \l {Adding Dynamics}

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

@@ -26,7 +26,11 @@
 /*!
     \page qtquick-annotations.html
     \previouspage qtquick-fonts.html
+    \if defined(qtdesignstudio)
     \nextpage creator-quick-ui-forms.html
+    \else
+    \nextpage qtquick-placeholder-data.html
+    \endif
 
     \title Annotating Designs
 

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

@@ -203,94 +203,6 @@
     You can add other languages later by editing the project file.
     \endif
 
-    \section1 Loading Placeholder Data
-
-    The Design mode supports views, models, and delegates, so that when you add
-    a Grid View, List View, or Path View item, the ListModel and the delegate
-    item are added automatically.
-
-    However, the missing context of the application presents a challenge.
-    Specific models defined in C++ are the most obvious case. Often,
-    the context is missing simple properties, which are either defined in C++,
-    or in other QML files. A typical example is an item that uses the
-    properties of its parent, such as \c parent.width.
-
-    \section2 Using Dummy Models
-
-    If you open a file in the Design mode that references a C++ model, you see
-    nothing on
-    the canvas. If the data in the model is fetched from the internet, you have
-    no control over it. To get reliable data, \e {dummy data} was introduced.
-
-    For example, the following code snippet describes the file example.qml that
-    contains a ListView that in turn specifies a C++ model:
-
-    \qml
-        ListView {
-            model: dataModel
-            delegate: ContactDelegate {
-                name: name
-            }
-        }
-    \endqml
-
-    Create a directory named \e dummydata in the root directory of the project,
-    so that it is not deployed to the device. In the \c dummydata directory,
-    create a QML file that has the same name as the value of \c model:
-
-    \code
-        qml/exampleapp/example.qml
-        dummydata/dataModel.qml
-    \endcode
-
-    Then create the dataModel.qml file that contains the dummy data:
-
-    \qml
-        import QtQuick 2.0
-
-        ListModel {
-             ListElement {
-                 name: "Ariane"
-             }
-             ListElement {
-                 name: "Bella"
-             }
-             ListElement {
-                 name: "Corinna"
-             }
-        }
-    \endqml
-
-    \section2 Creating Dummy Context
-
-    The following example presents a common pattern in QML:
-
-    \qml
-        Item {
-            width: parent.width
-            height: parent.height
-        }
-    \endqml
-
-    This works nicely for applications but the Design mode displays a zero-sized
-    item. A parent for the opened file does not exist, because the context is
-    missing. To get around the missing context, the idea of a \e {dummy
-    context} is introduced. If you place a file with the same name as the
-    application (here, example.qml) in the \c {dummydata/context} directory,
-    you can fake a parent context:
-
-    \qml
-        import QtQuick 2.0
-        import QmlDesigner 1.0
-
-        DummyContextObject {
-            parent: Item {
-                width: 640
-                height: 300
-            }
-        }
-    \endqml
-
     \section1 Building Transformations on Items
 
     The \uicontrol Advanced tab allows you to configure advanced

doc/qtcreator/src/qtquick/qtquick-ui-forms.qdoc

@@ -31,7 +31,11 @@
 
 /*!
     \page creator-quick-ui-forms.html
+    \if defined(qtdesignstudio)
     \previouspage qtquick-annotations.html
+    \else
+    \previouspage qtquick-placeholder-data.html
+    \endif
     \nextpage qtquick-adding-dynamics.html
 
     \title Qt Quick UI Forms

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

@@ -101,6 +101,15 @@
             You can annotate your designs to provide reviewers or developers
             with additional information about them.
 
+        \if defined(qtcreator)
+        \li \l {Loading Placeholder Data}
+
+            You can create QML files that contain placeholder data, so that
+            you can test grid, list, or path views, even though you don't
+            have access to real data.
+
+        \endif
+
     \if defined(qtdesignstudio)
     \endlist
 

doc/qtdesignstudio/src/qtdesignstudio-javascript.qdoc

@@ -24,7 +24,7 @@
 ****************************************************************************/
 
 /*!
-    \previouspage studio-simulation-overview.html
+    \previouspage qtquick-placeholder-data.html
     \page studio-javascript.html
     \nextpage studio-simulink.html
 

doc/qtdesignstudio/src/qtdesignstudio-simulation-overview.qdoc

@@ -26,7 +26,7 @@
 /*!
     \page studio-simulation-overview.html
     \previouspage creator-editor-options-text.html
-    \nextpage studio-javascript.html
+    \nextpage qtquick-placeholder-data.html
 
     \title Simulating Data Input
 
@@ -37,6 +37,12 @@
     Simulink simulation.
 
     \list
+        \li \l{Loading Placeholder Data}
+
+            You can create QML files that contain placeholder data, so that
+            you can test grid, list, or path views, even though you don't
+            have access to real data.
+
         \li \l{Simulating Application Logic}
 
         You can use JavaScript to generate mock data for your UI.

doc/qtdesignstudio/src/qtdesignstudio-toc.qdoc

@@ -159,6 +159,7 @@
                 \endlist
             \li \l{Simulating Data Input}
             \list
+                \li \l{Loading Placeholder Data}
                 \li \l{Simulating Application Logic}
                 \li \l{Simulating Dynamic Systems}
             \endlist