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Doc: Describe Navigator and Properties in separate topics

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To modularize the Qt Quick Designer docs.

Change-Id: Ia0ef0dbd07344375a7f145af16fe949e7807d55f
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
This commit is contained in:
Leena Miettinen
2018-07-04 17:59:28 +02:00
parent e0f8779168
commit b5686f7f1b
6 changed files with 390 additions and 318 deletions
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2
doc/src/qtcreator-toc.qdoc
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@@ -88,6 +88,8 @@
\li \l {Creating Qt Quick Projects} \li \l {Creating Qt Quick Projects}
\li \l {Qt Quick UI Forms} \li \l {Qt Quick UI Forms}
\li \l {Editing QML Files in Design Mode} \li \l {Editing QML Files in Design Mode}
\li \l {Managing Item Hierarchy}
\li \l {Specifying Item Properties}
\li \l {Editing PathView Properties} \li \l {Editing PathView Properties}
\li \l {Adding Connections} \li \l {Adding Connections}
\list \list

10
doc/src/qtquick/qtquick-app-development.qdoc
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@@ -56,6 +56,16 @@
\uicontrol {Text Editor} in the Design mode to \uicontrol {Text Editor} in the Design mode to
develop Qt Quick applications. develop Qt Quick applications.
\li \l {Managing Item Hierarchy}
You can manage the items in the current QML file and their
relationships in the \uicontrol Navigator.
\li \l {Specifying Item Properties}
You can specify properties for your components in the
\uicontrol Properties pane.
\li \l {Editing PathView Properties} \li \l {Editing PathView Properties}
You can use a graphical spline editor to specify \l{PathView} paths. You can use a graphical spline editor to specify \l{PathView} paths.

328
doc/src/qtquick/qtquick-designer.qdoc
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@@ -33,7 +33,7 @@
\contentspage {Qt Creator Manual} \contentspage {Qt Creator Manual}
\previouspage creator-quick-ui-forms.html \previouspage creator-quick-ui-forms.html
\page creator-using-qt-quick-designer.html \page creator-using-qt-quick-designer.html
\nextpage qmldesigner-pathview-editor.html \nextpage qtquick-navigator.html
\title Editing QML Files in Design Mode \title Editing QML Files in Design Mode
@@ -68,11 +68,13 @@
project, and other resources. project, and other resources.
\li \uicontrol {Navigator} (3) displays the items in the current QML \li \uicontrol {Navigator} (3) displays the items in the current QML
file as a tree structure. file as a tree structure. For more information, see
\l {Managing Item Hierarchy}.
\li \uicontrol {Properties} (4) organizes the properties of the \li \uicontrol {Properties} (4) organizes the properties of the
selected item. You can change the properties also in the selected item. You can change the properties also in the
\uicontrol {Text Editor}. \uicontrol {Text Editor}. For more information, see
\l {Specifying Item Properties}.
\li \uicontrol Connections (5) enables you to create connections \li \uicontrol Connections (5) enables you to create connections
between objects, signals, and object properties. For more between objects, signals, and object properties. For more
@@ -97,94 +99,6 @@
\endlist \endlist
\section1 Managing Item Hierarchy
The \uicontrol Navigator displays the items in the current QML file and their
relationships.
Items (1) are listed in a tree structure, below their parent (2).
\image qmldesigner-navigator.png "Navigator"
You can select items in the \uicontrol Navigator to edit their properties
in the \uicontrol Properties pane. Items can access the properties of their
parent item. To select items on the canvas, right-click an item,
and select another type in the context menu.
Typically, child items are located within the parent item on the
canvas. However, they do not necessarily have to fit inside the parent
item. For example, you might want to make a mouse area larger than the
rectangle or image beneath it (1).
\image qmldesigner-element-size.png "Mouse area for a button"
When you copy an item, all its child items are also copied. When
you remove an item, the child items are also removed.
You can show and hide items on the canvas to focus on specific parts of the
application. Click the \inlineimage icon_color_none.png
(\uicontrol Transparent) button to change the visibility of an item on the
canvas. To change the
visibility of an item in the application, select the \uicontrol Visibility
check box in the \uicontrol Properties pane or select \uicontrol Edit >
\uicontrol Visibility in the context menu.
You can also set the \uicontrol Opacity field to 0 to hide items that you
want to apply animation to.
As all properties, visibility and opacity are inherited from the parent
item. To hide or show child items, edit the properties of the parent item.
To hide invisible items in the navigator, click \inlineimage filtericon.png
(\uicontrol {Filter Tree}) and select \uicontrol {Show only visible items}.
To reset item size, position, or anchors, select context menu commands. To
change the source of an Image type, select \uicontrol {Change Source URL} in
the context menu.
To view lists of files or projects, instead, select \uicontrol {File System},
\uicontrol {Open Documents}, or \uicontrol Projects in the menu.
To view several types of content at a time, split the sidebars by clicking
the \inlineimage splitbutton_horizontal.png
(\uicontrol Split) button.
\section2 Setting the Stacking Order
The \c z property of an \l Item determines its position in relation to its
sibling items in the
type hierarchy. By default, items with a higher stacking value are
drawn on top of siblings with a lower stacking value. Items with the same
stacking value are drawn in the order they are listed, from the last item
up.
To raise or lower the stack value of an item, select \inlineimage raise.png
(\uicontrol Raise) or \inlineimage lower.png
(\uicontrol Lower) on the toolbar.
To move an item to the front or back of all its siblings, right-click it in
the navigator or the \uicontrol {Form Editor} and select
\uicontrol {Stack (z)}. To remove the \c z property, select
\uicontrol {Reset z Property}.
You can also use a \uicontrol StackLayout item (Qt Quick Controls 2) to
create a stacked view. For more information, see \l {Using Layouts}.
\section2 Switching Parent Items
When you drag and drop instances of QML types to the canvas, the new item
is added as a child of the item beneath it. When you move items on the
canvas, it is not possible to determine
whether you want to adjust their position or attach them to a new
parent item. Therefore, the parent item is not automatically
changed. To change the parent of the item, press down the \key Shift
key before you drag and drop the item into a new position. The topmost
item under the cursor becomes the new parent of the item.
You can change the parent of an item also in the \uicontrol Navigator.
Drag and drop the item to another position in the tree or use the arrow
buttons (1) to move the item in the tree.
\image qmldesigner-navigator-arrows.png "Navigator arrow buttons"
\section1 QML Type Library \section1 QML Type Library
The \uicontrol {Library} enables you to select QML types, UI components, and The \uicontrol {Library} enables you to select QML types, UI components, and
@@ -209,229 +123,9 @@
\uicontrol {Resources} displays the images and other files that you copy \uicontrol {Resources} displays the images and other files that you copy
to the project folder (to the same subfolder as the QML files). to the project folder (to the same subfolder as the QML files).
\section1 Specifying Item Properties \section1 Snapping to Parent and Sibling Items
The \uicontrol Properties pane displays all the properties of the selected item.
The properties are grouped by type. The top part of the pane
displays properties that are common to all QML types, such as
position, size, and visibility.
The bottom part of the pane displays properties that are specific to each
QML type. For example, the following image displays the properties you
can set for \uicontrol Rectangle (1) and \uicontrol Text (2) items.
\image qmldesigner-element-properties.png
To change the item type, double-click the \uicontrol Type field in the
\uicontrol Properties pane, and enter the name of another QML type in the
field. If you have specified properties for the item that are not supported
for the new type, the type cannot be changed and an error message is
displayed. Remove the properties in the \uicontrol {Text Editor} and try
again.
To return an item to its implicit position after moving it, select the
\inlineimage qtcreator-reset-position-icon.png
(\uicontrol {Reset Position}) button on the toolbar. To return it to its
implicit size, select \inlineimage qtcreator-reset-size-icon.png
(\uicontrol {Reset Size}) button.
To set the visibility of the item, select \uicontrol {Edit > Visibility} in the context menu.
To specify the color of the selected item in the \uicontrol {Select Color}
dialog, select \uicontrol {Edit Color} in the context menu.
For more information on the properties available for an item, press
\key {F1}.
\section2 Viewing Changes in Properties
The default values of properties are displayed in white color, while the
values that you specify explicitly are highlighted with blue color. In
addition, property changes in states are highlighted with blue.
This allows you to easily see which values are set in the UI form or
QML file and
which values are default characteristics of a QML type or a component.
When editing states, you can easily see which values are explicitly set in
the current state and which values are derived from the base state.
The following images illustrate this. In the base state, the \uicontrol Size (1)
and \uicontrol Colors (2) values are explicitly set and highlighted.
\image qmldesigner-properties-explicit-base.png "Explicitly set properties"
In \uicontrol State1, only the color (1) is explicitly set and highlighted.
\image qmldesigner-properties-explicit-state1.png "Explicitly set properties"
Resetting a property sets it back to the default value and removes the value
from the UI form or QML file.
\note As a result, all boolean values can be visualized in four different
ways.
For example, visibility can be visualized as follows:
\table
\row
\li \image qmldesigner-boolean-true.png
\li TRUE
\li The QML type is visible by default. The visibility might be
overridden by the visibility set in the base state.
\row
\li \image qmldesigner-boolean-true-blue.png
\li TRUE (highlighted)
\li The QML type is explicitly set to visible.
\row
\li \image qmldesigner-boolean-false.png
\li FALSE
\li The QML type is hidden by default. The visibility might be
overridden by the visibility set in the base state.
\row
\li \image qmldesigner-boolean-false-blue.png
\li FALSE (hightlighted)
\li The type is explicitly set to hidden.
\endtable
\section2 Marking Text Items for Translation
To support translators, mark each text item that should be translated.
In the \uicontrol Properties pane, \uicontrol Text field, select \uicontrol tr (1).
\image qmldesigner-text-property-tr.png "Text properties"
By default, the text string is enclosed in a \c qsTr() call.
\image qml-translate.png "Text marked for translation"
If you use text IDs instead of plain text, change the default call to
\c qsTrId(). Select \uicontrol Tools > \uicontrol Options >
\uicontrol {Qt Quick} > \uicontrol {\QMLD}, and then select the
\uicontrol {qsTrId()} radio button in the \uicontrol Internationalization
group. For more information about text ID based translations, see
\l {Qt Linguist Manual: Text ID Based Translations}.
To preserve the context when editing the text or to change the context
by setting a binding on the text property, change the default call to
\c qsTranslate() by selecting the \uicontrol {qsTranslate()} radio button.
For more information, see
\l {Internationalization and Localization with Qt Quick}.
\section2 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.
\section3 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 1.0
ListModel {
ListElement {
name: "Ariane"
}
ListElement {
name: "Bella"
}
ListElement {
name: "Corinna"
}
}
\endqml
\section3 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 1.0
import QmlDesigner 1.0
DummyContextObject {
parent: Item {
width: 640
height: 300
}
}
\endqml
\section2 Building Transformations on Items
The \uicontrol Advanced pane allows you to configure advanced transformations,
such as rotation, scale, and translation. You can assign any number of
transformations to an item. Each transformation is applied in order, one at
a time.
For more information on Transform types, see \l{Transform}.
\section2 Editing Properties Inline
You can double-click objects on the canvas to edit their text, color, or
source properties inline.
Because you can specify several of these properties for some QML types, such
as \l [QML]{TextEdit}{Text Edit}, you can also right-click objects to open
the inline editors from a context-menu.
\image qmldesigner-inline-editing.png
\section1 Working with QML Types on Canvas
You design applications on the canvas by placing items on it. You design applications on the canvas by placing items on it.
\section2 Snapping to Parent and Sibling Items
When you are working on a design, you can use snapping to align When you are working on a design, you can use snapping to align
items on the canvas. Click the \inlineimage snapping.png items on the canvas. Click the \inlineimage snapping.png
button to have the items snap to their parent or sibling items. Snapping button to have the items snap to their parent or sibling items. Snapping
@@ -451,13 +145,13 @@
\image qmldesigner-snap-margins.png "Snapping lines on canvas" \image qmldesigner-snap-margins.png "Snapping lines on canvas"
\section2 Hiding Item Boundaries \section1 Hiding Item Boundaries
The Design mode displays the boundaries of items on the canvas. To hide The Design mode displays the boundaries of items on the canvas. To hide
the boundaries, click the \inlineimage boundingrect.png the boundaries, click the \inlineimage boundingrect.png
button. button.
\section2 Selecting Items \section1 Selecting Items
When you point the mouse to overlapping items, the frontmost item is When you point the mouse to overlapping items, the frontmost item is
selected by default. However, items that do not have any content, such as selected by default. However, items that do not have any content, such as
@@ -467,7 +161,7 @@
\inlineimage qmldesigner-only-select-items-with-content.png \inlineimage qmldesigner-only-select-items-with-content.png
button. button.
\section2 Previewing Component Size \section1 Previewing Component Size
The width and height of the root item in a QML file determine the size of The width and height of the root item in a QML file determine the size of
the component. You can reuse components, such as buttons, in different the component. You can reuse components, such as buttons, in different
@@ -485,13 +179,13 @@
\image qmldesigner-preview-size.png "Canvas width and height" \image qmldesigner-preview-size.png "Canvas width and height"
\section2 Specifying Canvas Size \section1 Specifying Canvas Size
To change the canvas size, select \uicontrol Tools > \uicontrol Options > To change the canvas size, select \uicontrol Tools > \uicontrol Options >
\uicontrol {Qt Quick} > \uicontrol {\QMLD} and \uicontrol {Qt Quick} > \uicontrol {\QMLD} and
specify the canvas width and height in the \uicontrol Canvas group. specify the canvas width and height in the \uicontrol Canvas group.
\section2 Refreshing the Canvas \section1 Refreshing the Canvas
When you open QML files in the Design mode, the items in the file are drawn When you open QML files in the Design mode, the items in the file are drawn
on the canvas. When you edit the item properties, the QML file and on the canvas. When you edit the item properties, the QML file and

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doc/src/qtquick/qtquick-navigator.qdoc Normal file
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@@ -0,0 +1,116 @@
/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Creator documentation.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** 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. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
**
****************************************************************************/
/*!
\contentspage {Qt Creator Manual}
\previouspage creator-using-qt-quick-designer.html
\page qtquick-navigator.html
\nextpage qtquick-properties.html
\title Managing Item Hierarchy
The \uicontrol Navigator displays the items in the current QML file and
their relationships. Items (1) are listed in a tree structure, below their
parent (2).
\image qmldesigner-navigator.png "Navigator"
You can select items in the \uicontrol Navigator to edit their properties
in the \uicontrol Properties pane. Items can access the properties of their
parent item. To select items on the canvas, right-click an item, and select
another type in the context menu.
Typically, child items are located within the parent item on the canvas.
However, they do not necessarily have to fit inside the parent item. For
example, you might want to make a mouse area larger than the rectangle
or image beneath it (1).
\image qmldesigner-element-size.png "Mouse area for a button"
When you copy an item, all its child items are also copied. When
you remove an item, the child items are also removed.
You can show and hide items on the canvas to focus on specific parts of the
application. Click the \inlineimage icon_color_none.png
(\uicontrol Transparent) button to change the visibility of an item on the
canvas. To change the visibility of an item in the application, select the
\uicontrol Visibility check box in the \uicontrol Properties pane or select
\uicontrol Edit > \uicontrol Visibility in the context menu.
You can also set the \uicontrol Opacity field to 0 to hide items that you
want to apply animation to.
As all properties, visibility and opacity are inherited from the parent
item. To hide or show child items, edit the properties of the parent item.
To hide invisible items in the navigator, click \inlineimage filtericon.png
(\uicontrol {Filter Tree}) and select \uicontrol {Show only visible items}.
To reset item size, position, or anchors, select context menu commands. To
change the source of an Image type, select \uicontrol {Change Source URL} in
the context menu.
To view lists of files or projects, instead, select \uicontrol {File System},
\uicontrol {Open Documents}, or \uicontrol Projects in the menu. To view
several types of content at a time, split the sidebars by clicking the
\inlineimage splitbutton_horizontal.png
(\uicontrol Split) button.
\section1 Setting the Stacking Order
The \c z property of an \l Item determines its position in relation to its
sibling items in the type hierarchy. By default, items with a higher
stacking value are drawn on top of siblings with a lower stacking value.
Items with the same stacking value are drawn in the order they are listed,
from the last item up.
To raise or lower the stack value of an item, select \inlineimage raise.png
(\uicontrol Raise) or \inlineimage lower.png
(\uicontrol Lower) on the toolbar.
To move an item to the front or back of all its siblings, right-click it in
the navigator or the \uicontrol {Form Editor} and select
\uicontrol {Stack (z)}. To remove the \c z property, select
\uicontrol {Reset z Property}.
You can also use a \uicontrol StackLayout item (Qt Quick Controls 2) to
create a stacked view. For more information, see \l {Using Layouts}.
\section1 Switching Parent Items
When you drag and drop instances of QML types to the canvas, the new item is
added as a child of the item beneath it. When you move items on the canvas,
it is not possible to determine whether you want to adjust their position or
attach them to a new parent item. Therefore, the parent item is not
automatically changed. To change the parent of the item, press down the
\key Shift key before you drag and drop the item into a new position. The
topmost item under the cursor becomes the new parent of the item.
You can change the parent of an item also in the \uicontrol Navigator.
Drag and drop the item to another position in the tree or use the arrow
buttons (1) to move the item in the tree.
\image qmldesigner-navigator-arrows.png "Navigator arrow buttons"
*/

2
doc/src/qtquick/qtquick-pathview-editor.qdoc
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@@ -25,7 +25,7 @@
/*! /*!
\contentspage {Qt Creator Manual} \contentspage {Qt Creator Manual}
\previouspage creator-using-qt-quick-designer.html \previouspage qtquick-properties.html
\page qmldesigner-pathview-editor.html \page qmldesigner-pathview-editor.html
\nextpage qmldesigner-connections.html \nextpage qmldesigner-connections.html

250
doc/src/qtquick/qtquick-properties.qdoc Normal file
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@@ -0,0 +1,250 @@
/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Creator documentation.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** 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. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
**
****************************************************************************/
/*!
\contentspage {Qt Creator Manual}
\previouspage qtquick-navigator.html
\page qtquick-properties.html
\nextpage qmldesigner-pathview-editor.html
\title Specifying Item Properties
The \uicontrol Properties pane displays all the properties of the selected
item. The properties are grouped by type. The top part of the pane displays
properties that are common to all QML types, such as position, size, and
visibility.
The bottom part of the pane displays properties that are specific to each
QML type. For example, the following image displays the properties you can
set for \uicontrol Rectangle (1) and \uicontrol Text (2) items.
\image qmldesigner-element-properties.png
To change the item type, double-click the \uicontrol Type field in the
\uicontrol Properties pane, and enter the name of another QML type in the
field. If you have specified properties for the item that are not supported
for the new type, the type cannot be changed and an error message is
displayed. Select the \uicontrol Nut menu next to the property name, and
then select \uicontrol Reset to remove the property values before trying
again.
To return an item to its implicit position after moving it, select the
\inlineimage qtcreator-reset-position-icon.png
(\uicontrol {Reset Position}) button on the toolbar. To return it to its
implicit size, select \inlineimage qtcreator-reset-size-icon.png
(\uicontrol {Reset Size}) button.
To set the visibility of the item, select \uicontrol Edit >
\uicontrol Visibility in the context menu.
To specify the color of the selected item in the \uicontrol {Select Color}
dialog, select \uicontrol {Edit Color} in the context menu.
For more information on the properties available for an item, press
\key {F1}.
\section1 Viewing Changes in Properties
The default values of properties are displayed in white color, while the
values that you specify explicitly are highlighted with blue color. In
addition, property changes in states are highlighted with blue.
This allows you to easily see which values are set in the UI form or QML
file and which values are default characteristics of a QML type or a
component.
When editing states, you can easily see which values are explicitly set in
the current state and which values are derived from the base state.
The following images illustrate this. In the base state, the \uicontrol Size
(1) and \uicontrol Colors (2) values are explicitly set and highlighted.
\image qmldesigner-properties-explicit-base.png "Explicitly set properties"
In \uicontrol State1, only the color (1) is explicitly set and highlighted.
\image qmldesigner-properties-explicit-state1.png "Explicitly set properties"
Resetting a property sets it back to the default value and removes the value
from the UI form or QML file.
\note As a result, all boolean values can be visualized in four different
ways.
For example, visibility can be visualized as follows:
\table
\row
\li \image qmldesigner-boolean-true.png
\li TRUE
\li The QML type is visible by default. The visibility might be
overridden by the visibility set in the base state.
\row
\li \image qmldesigner-boolean-true-blue.png
\li TRUE (highlighted)
\li The QML type is explicitly set to visible.
\row
\li \image qmldesigner-boolean-false.png
\li FALSE
\li The QML type is hidden by default. The visibility might be
overridden by the visibility set in the base state.
\row
\li \image qmldesigner-boolean-false-blue.png
\li FALSE (hightlighted)
\li The type is explicitly set to hidden.
\endtable
\section1 Marking Text Items for Translation
To support translators, mark each text item that should be translated.
In the \uicontrol Properties pane, \uicontrol Text field, select \uicontrol tr (1).
\image qmldesigner-text-property-tr.png "Text properties"
By default, the text string is enclosed in a \c qsTr() call.
\image qml-translate.png "Text marked for translation"
If you use text IDs instead of plain text, change the default call to
\c qsTrId(). Select \uicontrol Tools > \uicontrol Options >
\uicontrol {Qt Quick} > \uicontrol {\QMLD}, and then select the
\uicontrol {qsTrId()} radio button in the \uicontrol Internationalization
group. For more information about text ID based translations, see
\l {Qt Linguist Manual: Text ID Based Translations}.
To preserve the context when editing the text or to change the context
by setting a binding on the text property, change the default call to
\c qsTranslate() by selecting the \uicontrol {qsTranslate()} radio button.
For more information, see
\l {Internationalization and Localization with Qt Quick}.
\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 1.0
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 1.0
import QmlDesigner 1.0
DummyContextObject {
parent: Item {
width: 640
height: 300
}
}
\endqml
\section1 Building Transformations on Items
The \uicontrol Advanced pane allows you to configure advanced
transformations, such as rotation, scale, and translation. You
can assign any number of transformations to an item. Each
transformation is applied in order, one at a time.
For more information on Transform types, see \l{Transform}.
\section1 Editing Properties Inline
You can double-click objects on the canvas to edit their text, color,
or source properties inline. Because you can specify several of these
properties for some QML types, such as \l [QML]{TextEdit}{Text Edit},
you can also right-click objects to open the inline editors from a
context-menu.
\image qmldesigner-inline-editing.png
*/