Question

我正在设计一个GUI，它将通过串口与微控制器进行交互。 GUI将查询微控制器，接收的数据将在表中更新。查询时间是可编程的，即GUI将根据指定的时间从1秒到30秒进行查询。

这就是我所做的 -

Table进行数据更新
Spinner查询时间
开始和停止Button。

有两个java文件GUI.java和serialCommunication.java。具有时间任务的计时器被调度以查询微控制器，并且来自串行事件的数据通过GUI缓冲器在表中更新。

一切都很好，但有时候在缓冲区中存储了许多值后表格会更新请帮助我同步所有数据获取和更新。我使用display.asyncExec（）写入Table。

public class practice {

static Table table;
private SerialComm myCommNew = new SerialComm();
private FileOperation myFile = new FileOperation();
private Text txtOutputData;
public int tblIndex=0;
public static String FILTER_PATH = "C:\\";
private static boolean hasDiagnoseData;

Display display = Display.getDefault();
private static int ijk;
private int timerValue;
/**
 * Create contents of the window.
 */
protected void createContents() {
    shell = new Shell();
    shell.addControlListener(new ControlAdapter() {
        @Override
        public void controlResized(ControlEvent e) {
            System.out.println(shell.getClientArea());
        }
    });
    shell.addShellListener(new ShellAdapter() {
        @Override
        public void shellClosed(ShellEvent evtShellClosed) {
            if (exitApplication()) {
                myCommNew.closePort();
                System.out.println("Port Closed Successfully");
                evtShellClosed.doit = true;
                System.exit(0);
            } else {
                evtShellClosed.doit = false;
            }
        }
    });
    shell.setSize(551, 548);
    shell.setText("SWT Application");
    shell.setLayout(null);


    final Label lblMessage = new Label(shell, SWT.NONE);
    lblMessage.setFont(SWTResourceManager.getFont("Segoe UI", 12, SWT.BOLD));
    lblMessage.setBounds(292, 64, 155, 33);

    final Combo comboPortsList = new Combo(shell, SWT.READ_ONLY);
    comboPortsList.setToolTipText("Select COM Port");
    comboPortsList.select(0);
    comboPortsList.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            String y = comboPortsList.getText();
            lblMessage.setText(y + " selected");
            try {
                myCommNew.connect(y);
            } catch (Exception e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }


        }
    });

    Button btnSearch = new Button(shell, SWT.NONE);
    btnSearch.addSelectionListener(new SelectionAdapter(){
        @Override
        public void widgetSelected(SelectionEvent e) {
            String[] no = myCommNew.getPorts();
            comboPortsList.setItems(no);
            myCommNew.closePort();
            System.out.println("Finished successfully");
        }
    });

    comboPortsList.setBounds(218, 21, 91, 23);
    comboPortsList.setText("Select Port");
    //comboPortsList.setItems(portsNumber);
    btnSearch.setBounds(364, 15, 161, 33);
    btnSearch.setText("Search for Available Ports");

// *********** *表************************************************ *********** //

    table = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
    table.setBounds(10, 193, 512, 112);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);

    TableColumn tblclmnSrNo = new TableColumn(table, SWT.NONE);
    tblclmnSrNo.setWidth(100);
    tblclmnSrNo.setText("Sr. No.");

    TableColumn tblclmnDate = new TableColumn(table, SWT.NONE);
    tblclmnDate.setWidth(100);
    tblclmnDate.setText("Date");

    TableColumn tblclmnValues = new TableColumn(table, SWT.NONE);
    tblclmnValues.setWidth(100);
    tblclmnValues.setText("Values");

    //final TableItem newRow = new TableItem(table, SWT.NONE);

// *********** * MENU ************************************************ *********** //

    Menu menu = new Menu(shell, SWT.BAR);
    shell.setMenuBar(menu);

    MenuItem mntmfile = new MenuItem(menu, SWT.CASCADE);
    mntmfile.setText("&File");

    Menu menu_1 = new Menu(mntmfile);
    mntmfile.setMenu(menu_1);

    MenuItem mntmopen = new MenuItem(menu_1, SWT.PUSH);
    mntmopen.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            FILTER_PATH = "C:\\";
            myFile.readFileCSV(myFile.openFileDlg());
        }
    });
    mntmopen.setText("&Open");

    MenuItem mntmsave = new MenuItem(menu_1, SWT.PUSH);
    mntmsave.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            String fileNameReceived = myFile.saveFileDlg();
            if(fileNameReceived!=null) {
                myFile.writeFileCSV(myFile.saveFileDlg());
            }
        }
    });
    mntmsave.setText("&Save");

    MenuItem mntmExit = new MenuItem(menu_1, SWT.NONE);
    mntmExit.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            shell.close();
        }
    });
    mntmExit.setText("E&xit");

    MenuItem mntmhelp = new MenuItem(menu, SWT.CASCADE);
    mntmhelp.setText("&Help");

    Menu menu_2 = new Menu(mntmhelp);
    mntmhelp.setMenu(menu_2);

    MenuItem mntmAbout = new MenuItem(menu_2, SWT.NONE);
    mntmAbout.setText("About");


    Button btnSend = new Button(shell, SWT.NONE);
    btnSend.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            String newData = txtOutputData.getText();
            myCommNew.sendData(newData+"\n");
            /*TableItem row = new TableItem(table, SWT.NONE);
            row.setText(0, Integer.toString(table.indexOf(row)+1));
            row.setText(1, getCurrentTime());               
            row.setText(2, newData);*/
        }
    });
    btnSend.setBounds(61, 384, 75, 25);
    btnSend.setText("Send");

    final Group grpSelectMode = new Group(shell, SWT.NONE);
    grpSelectMode.setFont(SWTResourceManager.getFont("Segoe UI", 10, SWT.NORMAL));
    grpSelectMode.setText("Select Mode");
    grpSelectMode.setBounds(10, 83, 276, 104);

    final Label lblSampleTime = new Label(grpSelectMode, SWT.NONE);
    lblSampleTime.setBounds(10, 70, 75, 16);
    lblSampleTime.setText("Sample Time");

    final Spinner spinSampleTime = new Spinner(grpSelectMode, SWT.BORDER | SWT.READ_ONLY);
    spinSampleTime.setMaximum(60);
    spinSampleTime.setMinimum(5);
    spinSampleTime.setSelection(10);
    spinSampleTime.setBounds(103, 67, 47, 22);

    Button btnAuto = new Button(grpSelectMode, SWT.RADIO);
    btnAuto.setSelection(true);
    btnAuto.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            grpSelectMode.setBounds(10, 83, 276, 104);
            lblSampleTime.setVisible(true);
            spinSampleTime.setVisible(true);
        }
    });
    btnAuto.setBounds(10, 30, 159, 16);
    btnAuto.setText("Auto");

    Button btnManual = new Button(grpSelectMode, SWT.RADIO);
    btnManual.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            lblSampleTime.setVisible(false);
            spinSampleTime.setVisible(false);
            grpSelectMode.setBounds(10, 83, 276, 70);
        }
    });
    btnManual.setBounds(176, 30, 90, 16);
    btnManual.setText("Manual");



    final Timer timer = new Timer();
    final TimerTask tmrTask = new TimerTask() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            myCommNew.sendData("Query" + " " + (++ijk) + "\n");
            System.out.println("Timer code Executed" + " " + (ijk));
            System.out.println(getCurrentTime());
            getTableData();
        }
    };

    final Button btnStart = new Button(shell, SWT.PUSH);
    final Button btnStop = new Button(shell, SWT.NONE);

    btnStart.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            if(myCommNew.isSerialPortOpen()) {
                timerValue = spinSampleTime.getSelection();
                timer.scheduleAtFixedRate(tmrTask, 1000, (timerValue*1000));
                btnStop.setEnabled(true);
                btnStart.setEnabled(false);
            } else
                System.out.println("Serial Port is Not Open, Kindly Check");

        }
    });
    btnStart.setBounds(450, 103, 75, 25);
    btnStart.setText("Start");

    btnStop.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            timer.cancel();
            System.out.println("\nTimer Cancelled");
            btnStart.setEnabled(true);
            btnStop.setEnabled(false);
        }
    });
    btnStop.setBounds(450, 162, 75, 25);
    btnStop.setText("Stop");
    btnStop.setEnabled(false);

}

private String getCurrentTime() {
    DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH.mm.ss");
    Date date1 = new Date();
    String date = dateFormat.format(date1);
    return date;
}

public static boolean recvDiagnoseDataExist() {
    if(hasDiagnoseData)
        return true;
    else
        return false;
}

private void getTableData() {
    display.asyncExec(new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            if(myCommNew.serialDataExist()) {
                try {
                    while(tblIndex<myCommNew.getSerialDataRecvd().size()) {
                        final TableItem newRow = new TableItem(table, SWT.NONE);
                        System.out.println("tblIndex Value:" + tblIndex);
                        System.out.println("Recvd Data Value:" + myCommNew.getSerialDataRecvd());
                        newRow.setText(0, Integer.toString(tblIndex));
                        newRow.setText(1, getCurrentTime());
                        newRow.setText(2,myCommNew.getSerialDataRecvd().get(tblIndex));
                        System.out.println("The Value Recvd is :" + myCommNew.getSerialDataRecvd().get(tblIndex));
                        tblIndex++;
                    }
                } catch (Exception excWhile) {
                    System.out.println("Error in creating row");
                    System.err.println(excWhile.toString());
                    excWhile.printStackTrace();
                }
                try {
                    myCommNew.resetSerialDataExist();
                } catch (Exception exc1) {
                    System.out.println("Error setting flag");
                    exc1.printStackTrace();
                }

            }
        }

    });

}

private boolean exitApplication() {
    MessageBox msgBox = new MessageBox(shell, SWT.ICON_QUESTION
            | SWT.YES | SWT.NO);
        msgBox.setMessage("Do you really want to exit?");
        msgBox.setText("Closing Application");
        //msgBox.
        int response = msgBox.open();
        if (response == SWT.YES) {
            return true;
        } else return false;

}

}

Answer 1

我会使用像

这样的东西

ILock lock....
Job dataFetcher = new Job("fetcher")
{ 
 // override run 
void run(...){

lock.lock();
try{
//get data from micro controller 

}finally{
Lock.unlock();
}
};
UIJob viewerUpdater= new UIJob (display, ""){ 
//override runInUIThread to update your viewer 
};
// add change listener and override the done method
dataFetcher.addJobChangeListener(
new JobChangeListener()
{
void done(){
viewerUpdater.schedule();
}
}
);

Java SWT-同步表更新，定时器任务和串行RxTx通信

1 个答案: