ch.elexis.core.ui.preferences.ScannerPref.java Source code

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Here is the source code for ch.elexis.core.ui.preferences.ScannerPref.java

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/*******************************************************************************
 * Copyright (c) 2006-2009, G. Weirich and Elexis
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    G. Weirich - initial implementation
 *    
 *******************************************************************************/
package ch.elexis.core.ui.preferences;

import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.preference.FieldEditorPreferencePage;
import org.eclipse.jface.preference.IntegerFieldEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

import ch.elexis.core.constants.Preferences;
import ch.elexis.core.data.activator.CoreHub;
import ch.elexis.core.ui.actions.ScannerEvents;

public class ScannerPref extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {
    public static final String ID = "ch.elexis.preferences.ScannerPrefs"; //$NON-NLS-1$

    private static class TextScannerListener implements Listener {
        final Text textfield;

        public TextScannerListener(Text textfield) {
            super();
            this.textfield = textfield;
        }

        public void handleEvent(Event event) {
            if (textfield.isFocusControl()) {
                String str = textfield.getText();
                if (str != null && str.length() > 0) {
                    str += "; "; //$NON-NLS-1$
                }
                if (event.character > 31) {
                    str += event.character;
                }
                str += "(" + event.keyCode + ")"; //$NON-NLS-1$ //$NON-NLS-2$
                textfield.setText(str);
            }
        }
    }

    TextScannerListener txtScannerListener;
    Button backupDefaultButton;

    SettingsPreferenceStore prefs = new SettingsPreferenceStore(CoreHub.globalCfg);

    public ScannerPref() {
        super(GRID);

        prefs.setDefault(Preferences.SCANNER_PREFIX_CODE, 0); //$NON-NLS-1$
        prefs.setDefault(Preferences.SCANNER_POSTFIX_CODE, 123456789); //$NON-NLS-1$
        prefs.setDefault(Preferences.BARCODE_LENGTH, 13); //$NON-NLS-1$

        setPreferenceStore(prefs);
        setDescription(Messages.ScannerPref_SettingsForScanner);
    }

    @Override
    protected void createFieldEditors() {
        addField(new IntegerFieldEditor(Preferences.SCANNER_PREFIX_CODE, Messages.ScannerPref_ScannerPrefix,
                getFieldEditorParent(), 10));

        addField(new IntegerFieldEditor(Preferences.SCANNER_POSTFIX_CODE, Messages.ScannerPref_ScannerPostfix,
                getFieldEditorParent(), 10));

        addField(new IntegerFieldEditor(Preferences.BARCODE_LENGTH, Messages.ScannerPref_Barcodelength,
                getFieldEditorParent(), 50));
    }

    @Override
    protected Control createContents(Composite parent) {
        super.createContents(parent);

        GridLayout noMarginLayout = new GridLayout(3, false);
        noMarginLayout.marginLeft = 0;

        Composite comp = new Composite(parent, SWT.NONE);
        comp.setLayout(noMarginLayout);
        comp.setLayoutData(new GridData(GridData.FILL_BOTH));

        Label lblTest = new Label(comp, SWT.NONE);
        lblTest.setText(Messages.ScannerPref_test);
        lblTest.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));
        final Text txtTest = new Text(comp, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY | SWT.WRAP);
        txtTest.setLayoutData(new GridData(GridData.FILL_BOTH));
        txtScannerListener = new TextScannerListener(txtTest);
        getShell().getDisplay().addFilter(SWT.KeyDown, txtScannerListener);

        backupDefaultButton = getShell().getDefaultButton();
        final Button hiddenBtn = new Button(parent, SWT.PUSH);
        hiddenBtn.setVisible(false);
        txtTest.addFocusListener(new FocusListener() {

            public void focusGained(FocusEvent e) {
                getShell().setDefaultButton(hiddenBtn);
            }

            public void focusLost(FocusEvent e) {
                getShell().setDefaultButton(backupDefaultButton);
            }
        });

        Button btnClear = new Button(comp, SWT.PUSH);
        btnClear.setText(Messages.ScannerPref_clear);
        btnClear.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));
        btnClear.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                txtTest.setText(""); //$NON-NLS-1$
                txtTest.setFocus();
            }

        });

        Button btnSteuerblatt = new Button(parent, SWT.PUSH);
        btnSteuerblatt.setText(Messages.ScannerPref_printSheet);
        btnSteuerblatt.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                MessageDialog.openInformation(getShell(), Messages.ScannerPref_printSettingsSheet,
                        Messages.ScannerPref_NotImplemented);
            }
        });

        return parent;
    }

    @Override
    public boolean performOk() {
        prefs.flush();
        boolean ok = super.performOk();
        ScannerEvents.getInstance().reloadCodes();
        return ok;
    }

    public void init(IWorkbench workbench) {
        // TODO Auto-generated method stub

    }

    @Override
    public void dispose() {
        if (txtScannerListener != null) {
            getShell().getDisplay().removeFilter(SWT.KeyDown, txtScannerListener);
        }
        super.dispose();
    }

}