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| Re: Instance factory implementation for newly created custom component plugin [message #818399 is a reply to message #817700] |
Sun, 11 March 2012 11:08   |
Eclipse User |
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1. Custom Widget class
package com.widgets.custom;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Scale;
import org.eclipse.swt.widgets.Text;
public class CECScale extends Composite {
private final Text text;
/**
* Create the composite.
*
* @param parent
* @param style
*/
public CECScale(final Composite parent, final int style) {
super(parent, style);
setLayout(new GridLayout(1, false));
Group grpCecscale = new Group(this, SWT.NONE);
grpCecscale.setLayout(new GridLayout(2, false));
GridData gd_grpCecscale = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1);
gd_grpCecscale.widthHint = 236;
grpCecscale.setLayoutData(gd_grpCecscale);
grpCecscale.setText("CECScale");
Scale scale = new Scale(grpCecscale, SWT.NONE);
text = new Text(grpCecscale, SWT.BORDER);
GridData gd_text = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
gd_text.widthHint = 27;
text.setLayoutData(gd_text);
}
@Override
protected void checkSubclass() {
// Disable the check that prevents subclassing of SWT components
}
}
2. Factory class
package com.widgets.custom;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
public class WidgetFactory {
public WidgetFactory(Display display) {
}
public Button createButton(Composite parent, String text, int style) {
Button button = new Button(parent, style );
if (text != null)
button.setText(text);
return button;
}
public CECScale createCECScale(Composite parent, int style){
return new CECScale(parent, style);
}
}
3. WidgetFactory.wbp-factory.xml
<?xml version='1.0' encoding='UTF-8'?>
<factory>
<!-- createButton() -->
<method name="createButton">
<parameter type="org.eclipse.swt.widgets.Composite" parent="true" />
<parameter type="java.lang.String" defaultSource=""New Button"" />
<parameter type="int" defaultSource="org.eclipse.swt.SWT.NONE">
<editor id="style">
<parameter name="class">org.eclipse.swt.SWT</parameter>
<parameter name="set">BORDER</parameter>
<parameter name="select0">type PUSH PUSH CHECK RADIO TOGGLE ARROW
</parameter>
<parameter name="select1">align LEFT LEFT CENTER RIGHT</parameter>
</editor>
</parameter>
<description>Creates a button as a part of the form.</description>
<name>Some name for palette entry.</name>
</method>
<method name="createCECScale" factory = "true">
<parameter type="org.eclipse.swt.widgets.Composite" parent="true" />
<parameter type="int" defaultSource="org.eclipse.swt.SWT.NONE">
</parameter>
<description>Creates a label as a part of the form.</description>
<name>Some name for palette entry.</name>
</method>
</factory>
4. Plugin.xml
<!-- ======================================================== -->
<!-- Toolkit -->
<!-- ======================================================== -->
<extension point="org.eclipse.wb.core.toolkits">
<toolkit id="org.eclipse.wb.rcp">
<resourcePrefixes>
<resourcePrefix>com.widgets.custom.</resourcePrefix>
</resourcePrefixes>
<palette>
<category description="Custom widgets" id="com.widgets.custom" name="MyWidgets">
<component class="com.widgets.custom.CECScale"/>
<instance-factory class="com.widgets.custom.WidgetFactory">
<method
name="CECScale"
signature="createCECScale(org.eclipse.swt.widgets.Composite,int)"/>
<method
name="Button"
signature="createButton(org.eclipse.swt.widgets.Composite,java.lang.String,int)">
</method>
</instance-factory>
</category>
</palette>
<classLoader-bundle
bundle="com.widgets.custom.designer"
namespaces="com.widgets.custom.">
</classLoader-bundle>
</toolkit>
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
Finaly the factory methods are not getting added to the Palette
I am getting the error message : Factory class com.widgets.custom.WidgetFactory contains no factory methods.
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