Qt designer reading xml(.ui) file implementation

[Sam]

Hi,

I have a requirement where i need to read an xml file which specifies the layout and position of the widgets in a Form/QMainWindow.
Since Qt designer also works in the same way i.e reading from the xml structure in .ui file and loading it to the frame/widget.

Where can i find the above implementation I checked "QUiLoader.cpp":http://qt.gitorious.org/qt/qttools/blobs/ad9b37a706567147b78d22d0de4a016b6c5af9b3/src/designer/src/uitools/quiloader.cpp. but could not understand much.

Thanks in advance.

Note: With my own implementation I am able to read the xml file and load the widget to the form for single Layouts like QGridLayout , QFormLayout etc. I need an idea for the implementation of multiple layouts like a QGridLayout has a QHboxLayout etc.

[andre]

I don't know what your real question is here. You could implement your own scheme of course, but why would you? [[doc:QUiLoader]] can do it for you, based on standard .ui files that you already own a complete editor for: QtDesigner/QtCreator. It seems to me that it is harder to create your own system, than to spend the effort to learn about using QUiLoader by reading its docs and doing some experiments.

[Sam]

Thanks Andre,

Here the xml file consists of my own custom widgets. for eg:-

sample.xml

@<?xml version='1.0' encoding='UTF-8'?>
<Interface type="ConfigFrame">
<Attributes>
<Attribute name="WindowsTitle" value="Some Values For Parent Widget"/>
<Attribute name="HeaderTitle" value="Dummy Screen"/>
</Attributes>
<Layout type="Grid" name="mainLayout">
<Component type="Frame" name="frameTop">
<Position row="0" col="0" rowSpan="1" colSpan="3"/>
<Layout type="Grid" name ="upperLayout">
<Layout type="Horizontal" name="hBox" stretch="80">
<Position row="0" col="2" rowSpan="1" colSpan="1"/>
<Component type="Label" name="labelUser">
<Text alignment="TopCenter" textNo="100">User# </Text>
</Component>
<Component type="LineEdit" name="lineEditUser">
<Text> 1 </Text>
</Component>
</Layout>
<Component type ="Label" name="labelFullName" >
<Position row="1" col="1" rowSpan="1" colSpan="1" />
<Text alignment="TopCenter" textNo="101"> User Login </Text>
</Component>
<Component type ="LineEdit" name="lineEditFullName" >
<Position row="1" col="2" rowSpan="1" colSpan="2" />
<Text> Test </Text>
</Component>
</Layout>
</Component>
</Layout>
</Interface>@

So the requirement is that at the runtime I am going to read the xml file and add the same to a Form. For the custom widget there are other attributes/properties as well. So for the implementation I was thinking to get an idea how the QUiLoader class works ?

Thanks again.

[andre]

You're still not asking a question.

[Sam]

Sorry I might not be clear with my question. I want to know how the QUiLoader reads the xml file(.ui) and loads the widgets to the form i.e I want to generate a panel/frame thats contain the widgets specified in the xml file at the particular position based on the layouts. Then this panel/frame is added to the main module/application/frame.

The steps that i follow are.

1. Reading the xml file using QXmlStreamReader.
2. Storing the components/widgets to a container.
3. Storing the attributes of the components/widget to another container.
4. Then based on the layout , adding the component/widgets to the frame.

Problem is to handle multiple layouts. Also i want to know if this is the correct approach or not ?