Examples of org.eclipse.swt.layout.FormLayout

org.eclipse.swt.layout.FormLayout
Instances of this class control the position and size of the children of a composite control by using FormAttachments to optionally configure the left, top, right and bottom edges of each child.
The following example code creates a FormLayout and then sets it into a Shell:
```
 Display display = new Display (); Shell shell = new Shell(display); FormLayout layout = new FormLayout(); layout.marginWidth = 3; layout.marginHeight = 3; shell.setLayout(layout); 
```
To use a FormLayout, create a FormData with FormAttachment for each child of Composite. The following example code attaches button1 to the top and left edge of the composite and button2 to the right edge of button1 and the top and right edges of the composite:
```
 FormData data1 = new FormData(); data1.left = new FormAttachment(0, 0); data1.top = new FormAttachment(0, 0); button1.setLayoutData(data1); FormData data2 = new FormData(); data2.left = new FormAttachment(button1); data2.top = new FormAttachment(0, 0); data2.right = new FormAttachment(100, 0); button2.setLayoutData(data2); 
```
Each side of a child control can be attached to a position in the parent composite, or to other controls within the Composite by creating instances of FormAttachment and setting them into the top, bottom, left, and right fields of the child's FormData.

If a side is not given an attachment, it is defined as not being attached to anything, causing the child to remain at its preferred size. If a child is given no attachment on either the left or the right or top or bottom, it is automatically attached to the left and top of the composite respectively. The following code positions button1 and button2 but relies on default attachments:
```
 FormData data2 = new FormData(); data2.left = new FormAttachment(button1); data2.right = new FormAttachment(100, 0); button2.setLayoutData(data2); 
```
IMPORTANT: Do not define circular attachments. For example, do not attach the right edge of button1 to the left edge of button2 and then attach the left edge of button2 to the right edge of button1. This will over constrain the layout, causing undefined behavior. The algorithm will terminate, but the results are undefined.
@see FormData @see FormAttachment @since 2.0

     * @param style
     */
    public ProjectSelectionComposite(Composite parent, int style) {
        super(parent, style);
        compositeListeners = new LinkedList<CompositeListener>();
        setLayout(new FormLayout());


        final Button btnNone = new Button(this, SWT.BORDER | SWT.FLAT);
        final FormData fd_btnNone = new FormData();
        fd_btnNone.top = new FormAttachment(0, 10);
        fd_btnNone.right = new FormAttachment(100, -10);

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        input.setChanged();
        changedInDialog = true;
      }
    };


    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = Const.FORM_MARGIN;
    formLayout.marginHeight = Const.FORM_MARGIN;


    shell.setLayout(formLayout);
    shell.setText(BaseMessages.getString(PKG, "RubyStep.Shell.Title"));


    middle = props.getMiddlePct();


    // load images
    if (!guiResource.getImageMap().containsKey("TypeExitRubyStep:empty16x16")) {
      guiResource.getImageMap().put("TypeExitRubyStep:empty16x16", new Image(display, 16, 16));
    }


    String pluginBaseDir = PluginRegistry.getInstance().findPluginWithId(StepPluginType.class, "TypeExitRubyStep").getPluginDirectory().toString();
    String pluginImageDir = pluginBaseDir + Const.FILE_SEPARATOR + "images" + Const.FILE_SEPARATOR;


    URL pluginBaseURL = PluginRegistry.getInstance().findPluginWithId(StepPluginType.class, "TypeExitRubyStep").getPluginDirectory();


    try {
      pluginBaseFile = new File(pluginBaseURL.toURI());
    } catch (URISyntaxException e) {
      pluginBaseFile = new File(pluginBaseURL.getPath());
    }


    try {


      scriptImage = guiResource.getImage(pluginImageDir + ("libScript.png"));
      checkImage = guiResource.getImage(pluginImageDir + ("check.png"));
      rubyImage = guiResource.getImage(pluginImageDir + ("ruby_16.png"));
      addImage = guiResource.getImage(pluginImageDir + ("addSmall.png"));
      renameImage = guiResource.getImage(pluginImageDir + ("edit.png"));
      rowScriptImage = rubyImage;
      initScriptImage = guiResource.getImage(pluginImageDir + ("startScript.png"));
      disposeScriptImage = guiResource.getImage(pluginImageDir + ("endScript.png"));
      libScriptImage = scriptImage;
      infoStepImage = guiResource.getImage(pluginImageDir + ("info_step.png"));
      targetStepImage = guiResource.getImage(pluginImageDir + ("target_step.png"));
      inputImage = guiResource.getImage(pluginImageDir + ("input.png"));
      outputImage = guiResource.getImage(pluginImageDir + ("output.png"));
      fieldImage = guiResource.getImage(pluginImageDir + ("field.png"));
      fieldChangedImage = guiResource.getImage(pluginImageDir + ("field_changed.png"));
      folderImage = guiResource.getImage(pluginImageDir + ("folder.png"));
      errorOutputImage = guiResource.getImage(pluginImageDir + ("error_output.png"));
      fieldErrorImage = guiResource.getImage(pluginImageDir + ("field_error.png"));
      transformationImage = guiResource.getImage(pluginImageDir + ("transformation.png"));
      webDocumentImage = guiResource.getImage(pluginImageDir + ("web.png"));
    } catch (Exception e) {
      Image empty = guiResource.getImage("TypeExitRubyStep:empty16x16");
      scriptImage = empty;
      checkImage = empty;
      rubyImage = empty;
      addImage = empty;
      renameImage = empty;
      rowScriptImage = empty;
      initScriptImage = empty;
      disposeScriptImage = empty;
      libScriptImage = empty;
      infoStepImage = empty;
      targetStepImage = empty;
      inputImage = empty;
      outputImage = empty;
      fieldImage = empty;
      fieldChangedImage = empty;
      fieldErrorImage = empty;
      folderImage = empty;
      errorOutputImage = empty;
      transformationImage = empty;
      webDocumentImage = empty;
    }


    samplesHelper = new RubyStepSamplesHelper();
    samplesHelper.setFolderImage(folderImage);
    samplesHelper.setSampleImage(fieldImage);
    samplesHelper.setScriptImage(libScriptImage);
    samplesHelper.setTransformationImage(transformationImage);
    samplesHelper.setWebDocumentImage(webDocumentImage);


    // start construction


    // Stepname line
    wlStepname = new Label(shell, SWT.RIGHT);
    wlStepname.setText(BaseMessages.getString(PKG, "System.Label.StepName"));
    props.setLook(wlStepname);
    fdlStepname = new FormData();
    fdlStepname.left = new FormAttachment(0, 0);
    fdlStepname.right = new FormAttachment(middle, -margin);
    fdlStepname.top = new FormAttachment(0, margin);
    wlStepname.setLayoutData(fdlStepname);


    wStepname = new Text(shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER);
    wStepname.setText(stepname);
    props.setLook(wStepname);
    wStepname.addModifyListener(lsMod);
    fdStepname = new FormData();
    fdStepname.left = new FormAttachment(middle, 0);
    fdStepname.top = new FormAttachment(0, margin);
    fdStepname.right = new FormAttachment(100, 0);
    wStepname.setLayoutData(fdStepname);


    SashForm wSash = new SashForm(shell, SWT.VERTICAL);
    props.setLook(wSash);
    /*------------------------------------------------------------------------------------------------------------------------------------------------
     * Upper part of form  
     ------------------------------------------------------------------------------------------------------------------------------------------------*/


    // top part 
    wTop = new SashForm(wSash, SWT.HORIZONTAL);


    FormLayout topLayout = new FormLayout();
    topLayout.marginWidth = Const.FORM_MARGIN;
    topLayout.marginHeight = Const.FORM_MARGIN;
    wTop.setLayout(topLayout);
    props.setLook(wTop);


    addLeftArea();
    addScriptArea();


    FormData fdTop = new FormData();
    fdTop.left = new FormAttachment(0, 0);
    fdTop.top = new FormAttachment(0, 0);
    fdTop.right = new FormAttachment(100, 0);
    fdTop.bottom = new FormAttachment(100, 0);
    wTop.setLayoutData(fdTop);


    wTop.SASH_WIDTH = margin;
    wTop.setWeights(new int[] { 32, 68 });


    /*------------------------------------------------------------------------------------------------------------------------------------------------
     * Bottom part of form 
     ------------------------------------------------------------------------------------------------------------------------------------------------*/


    Composite wBottom = new Composite(wSash, SWT.NONE);
    props.setLook(wBottom);


    FormLayout bottomLayout = new FormLayout();
    bottomLayout.marginWidth = Const.FORM_MARGIN;
    bottomLayout.marginHeight = Const.FORM_MARGIN;
    wBottom.setLayout(bottomLayout);


    // separator

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    CTabItem outFieldsItem = new CTabItem(wBottomFolder, SWT.NONE);
    outFieldsItem.setText(BaseMessages.getString(PKG, "RubyStepDialog.ScopeVariables.Label"));


    Composite wPanel = new Composite(wBottomFolder, SWT.NONE);
    wPanel.setLayout(new FormLayout());


    FormData fdPanel = new FormData();
    fdPanel.left = new FormAttachment(0, 0);
    fdPanel.top = new FormAttachment(0, 0);
    fdPanel.right = new FormAttachment(100, 0);

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    CTabItem outFieldsItem = new CTabItem(wBottomFolder, SWT.NONE);
    outFieldsItem.setText(BaseMessages.getString(PKG, "RubyStepDialog.Fields.Label"));


    Composite wPanel = new Composite(wBottomFolder, SWT.NONE);
    wPanel.setLayout(new FormLayout());
    props.setLook(wPanel);


    FormData fdPanel = new FormData();
    fdPanel.left = new FormAttachment(0, 0);
    fdPanel.top = new FormAttachment(0, 0);

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    CTabItem infoStepsItem = new CTabItem(wBottomFolder, SWT.NONE);
    infoStepsItem.setText(BaseMessages.getString(PKG, "RubyStepDialog.InfoSteps.Label"));


    Composite wPanel = new Composite(wBottomFolder, SWT.NONE);
    wPanel.setLayout(new FormLayout());
    props.setLook(wPanel);


    FormData fdPanel = new FormData();
    fdPanel.left = new FormAttachment(0, 0);
    fdPanel.top = new FormAttachment(0, 0);

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    CTabItem targetStepsItem = new CTabItem(wBottomFolder, SWT.NONE);
    targetStepsItem.setText(BaseMessages.getString(PKG, "RubyStepDialog.TargetSteps.Label"));


    Composite wPanel = new Composite(wBottomFolder, SWT.NONE);
    wPanel.setLayout(new FormLayout());
    props.setLook(wPanel);


    FormData fdPanel = new FormData();
    fdPanel.left = new FormAttachment(0, 0);
    fdPanel.top = new FormAttachment(0, 0);

View Full Code Here


    CTabItem fieldSummaryItem = new CTabItem(wLeftFolder, SWT.NONE);
    fieldSummaryItem.setText(BaseMessages.getString(PKG, "RubyStepDialog.FieldSummary.Label"));


    Composite wPanel = new Composite(wLeftFolder, SWT.NONE);
    wPanel.setLayout(new FormLayout());
    props.setLook(wPanel);


    wTree = new Tree(wPanel, SWT.H_SCROLL | SWT.V_SCROLL);
    wTree.setHeaderVisible(true);
    TreeColumn column1 = new TreeColumn(wTree, SWT.LEFT);

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    CTabItem runtimeItem = new CTabItem(wBottomFolder, SWT.NONE);
    runtimeItem.setText(BaseMessages.getString(PKG, "RubyStepDialog.ExecutionModel.Label"));


    Composite wPanel = new Composite(wBottomFolder, SWT.NONE);
    wPanel.setLayout(new FormLayout());
    props.setLook(wPanel);


    Label lRubyCompat = new Label(wPanel, SWT.RIGHT);
    lRubyCompat.setText(BaseMessages.getString(PKG, "RubyStepDialog.ExecutionModel.Compatibility"));
    props.setLook(lRubyCompat);

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  private void addScriptArea() {


    // top right composite
    Composite wTopRight = new Composite(wTop, SWT.NONE);
    FormLayout topRightLayout = new FormLayout();
    topRightLayout.marginWidth = 0;
    topRightLayout.marginHeight = 0;
    wTopRight.setLayout(topRightLayout);
    props.setLook(wTopRight);

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  private void addLeftArea() {


    // top left composite
    wTopLeft = new Composite(wTop, SWT.NONE);
    FormLayout topLeftLayout = new FormLayout();
    topLeftLayout.marginWidth = 0;
    topLeftLayout.marginHeight = 0;
    wTopLeft.setLayout(topLeftLayout);
    props.setLook(wTopLeft);

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