SCViewer/com.minres.scviewer.e4.appl.../src/com/minres/scviewer/e4/application/handlers/NavigateTrans.java

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Java
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package com.minres.scviewer.e4.application.handlers;
import javax.inject.Named;
import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.workbench.modeling.EPartService;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
import com.minres.scviewer.database.ITx;
import com.minres.scviewer.database.swt.GotoDirection;
import com.minres.scviewer.e4.application.parts.WaveformViewerPart;
public class NavigateTrans {
final static String PARAMTER_ID="com.minres.scviewer.e4.application.command.navigateTransCommand.parameter.dir";
@CanExecute
public Boolean canExecute(ESelectionService selectionService){
Object o = selectionService.getSelection();
return o instanceof ITx;
}
@Execute
public void execute(@Named(PARAMTER_ID) String param, EPartService partService) {
MPart part = partService.getActivePart();
Object obj = part.getObject();
if(obj instanceof WaveformViewerPart){
if("next".equalsIgnoreCase(param))
((WaveformViewerPart)obj).moveSelection(GotoDirection.NEXT);
else if("prev".equalsIgnoreCase(param))
((WaveformViewerPart)obj).moveSelection(GotoDirection.PREV);
}
}
}