Question

对于设计用于打开多个文档的eclipse RCP文本编辑器应用程序，我已经合并了一个工具栏按钮来显示不可打印的字符（即制表符，空格和CR）。

为了显示这些字符，我添加/删除了jface painter WhitespaceCharacterPainter：

sv.addPainter(whitespaceCharacterPainter);

该按钮适用于单个部件，但在PartStack中有多个文档（由部件描述符调用创建），只有创建的最后一个部分显示/隐藏不可打印的字符。创建新零件时，其他零件仍处于最后状态。用户在部件之间切换或单击工具栏上的按钮。

我按下代码以在按下按钮时以及当零件成为所选零件时更新零件（通过相应选项卡上的ckick）。按钮hanlder。

我很欣赏任何暗示。

//Code...
/** Indicates the status of the WhiteSpaceCharacterPainter button on the toolbar for this part. */
private boolean wsToolBarButtonStatus = false;
public StyledText st;
public SourceViewer sv;
@Inject MPart parte;
//Code...

/**
 * Update the part when the user push the WhiteSpace toolbar button.
 * Sets the sv.addPainter(whitespaceCharacterPainter) 
     * or sv.removePainter(whitespaceCharacterPainter);
     * 
     * @param newButtonStatus Receives the status of the button from the IEventBroker
     */
@Inject
@Optional
public void updatePartByWSButton(@UIEventTopic(NastranEditorEventConstants.WHITE_CHARACTERS_STATUS) boolean newButtonStatus) {
 final MElementContainer<MUIElement>container = parte.getParent();
    if (parte.equals((MPart)container.getSelectedElement())){
    System.out.println("EL PART ES EL SELECTED ELEMENT cuando se aprieta el boton\t" + parte.getLabel());
        //if(wsToolBarButtonStatus != newButtonStatus)
            wsToolBarButtonStatus = newButtonStatus;
            if(wsToolBarButtonStatus){
                sv.addPainter(whitespaceCharacterPainter);
                System.out.println("addPainter......");
            }
            else{
                try{
                    sv.removePainter(whitespaceCharacterPainter);
                    System.out.println("removePainter.....");
                }catch (NullPointerException e) {
                    //e.printStackTrace();
                }
            }
    }
} 
/**
 * Update the WhiteSpace toolbar button when the part is active.
 * Only the active part is updated 
 * 
 * @param activePart
 */
@Inject
@Optional
public void updateWSButtonByPart(@Named(IServiceConstants.ACTIVE_PART) MPart activePart) {
    if (parte.equals(activePart)) {
        System.out.println("EL PART ACTIVO TIENE LABEL:\t" + parte.getLabel());
        MToolItem item = (MToolItem) modelService.find("es.robes.nastraneditor.toolbarbuttons.whitespacespainterbutton",app);
        item.setSelected(wsToolBarButtonStatus);
        if(wsToolBarButtonStatus){
            this.sv.addPainter(whitespaceCharacterPainter);
            System.out.println("addPainter......");
        }
        else{
            try{
                this.sv.removePainter(whitespaceCharacterPainter);
                System.out.println("removePainter......");
            }catch (NullPointerException e) {
                //e.printStackTrace();
            }
        } 
    }
}

按钮处理程序：

public class WhiteSpacesHandler {
    boolean status;
    @Execute
    public void execute(final MToolItem item, IEventBroker broker) {
        System.out.println("MToolItem element ID: "+ item.getElementId());
        if (item.isSelected()){
            System.out.println("Item is selected");
            status = true;
        //broker.post(NastranEditorEventConstants.WHITE_CHARACTERS_ENABLED, status);
    }

    else{
        System.out.println("Item is not selected");
        status = false;
        }
        broker.post(NastranEditorEventConstants.WHITE_CHARACTERS_STATUS, status);
    }
}

带有WhitespaceCharacterPainter和ToolbarButton的Eclipse RCP文本编辑器应用程序

0 个答案: