io Programmo 39/IOPROG_39.ISO/SOFT/sdkjava40.exe/data1.cab/fg_Samples/Samples/afc11/JNotepad/src/JNoteDialog.java

Java Source | 2000-05-04 | 4.7 KB | 190 lines

//
// (C) Copyright 1995 - 1999 Microsoft Corporation.  All rights reserved.
//
import com.ms.ui.*;
import com.ms.ui.resource.*;
import java.awt.*;

/**
*    An extension of UIDialog which emulates, to a certain extent, a Windows
*    dialog box. Several helper functions have been added which are called at
*    certain stages in the dialog's creation and display. Inherit from this
*    class and override the helper functions.
*
*    @version    1.0, 7/20/97
*/

public class JNoteDialog extends UIDialog implements IConstants
{
    /**
    *    Parent frame
    */
    protected UIFrame parentFrame;

    /**
    *    Creates a new JNoteDialog
    *
    *    @param    parentframe    Parent frame
    *    @param    title    Title of the dialog
    *    @param    isModal    true if the dialog is to be run as a modal dialog box, false if it is to be modeless
    */
    public JNoteDialog(UIFrame parentframe, String title, boolean isModal)
    {
        super(parentframe, title, isModal);
        init(parentframe);
    }

    /**
    *    Private init function. Sets the parent frame variable.
    */
    private void init(UIFrame parentframe)
    {
        parentFrame = parentframe;
    }

    /**
    *    Loads the dialog from a resource file. Fills the current dialog
    *    box with the controls read in from a res file. Uses Win32ResourceDecoder.
    *
    *    @param    resFile    Name of resource file to load from
    *    @param    dialogID    integer identifier of the dialog resource to load
    *    @returns    true if the loading succeeded, false if it did not.
    */
    public boolean loadDialog(String resFile, int dialogID)
    {
        Win32ResourceDecoder resdec;

        try
        {
            resdec = new Win32ResourceDecoder(resFile);
        }
        catch (Exception e) // !!!!!! Bad!
        {
            // dialog could not be loaded
            UIMessageBox box = new UIMessageBox(new UIFrame(),
                JNotePad.loadString(ResourceIDs.IDS_MSGTITLE),
                JNotePad.loadString(ResourceIDs.IDS_MSGNODIALOG),
                box.STOP, UIButtonBar.OK);
            box.doModal();

            return false;
        }
        return loadDialog(resdec, dialogID);
    }

    public boolean loadDialog(Win32ResourceDecoder resFile, int dialogID)
    {
        try
        {
            resFile.populateDialog(this, dialogID);
        }
        catch (Exception e)
        {
            // couldn't load dialog
            UIMessageBox box = new UIMessageBox(new UIFrame(),
                JNotePad.loadString(ResourceIDs.IDS_MSGTITLE),
                JNotePad.loadString(ResourceIDs.IDS_MSGNODIALOG),
                box.STOP, UIButtonBar.OK);
            box.doModal();

            return false;
        }

        return true;
    }

    /**
    *    Displays the dialog. Centers the dialog in the middle of the screen,
    *    calls initDialog(), and then shows it. Use this method, instead of show(),
    *    to display your dialog.
    */
    public void display()
    {
        position(false);
        initDialog();
        show();
    }

    /**
    *    Called right before the dialog is to be displayed. Override this to
    *    perform pre-display initialization of the dialog.
    */
    protected void initDialog() {
        // set focus to the OK button
        getComponentFromID(IDR_FILEOPTIONS_OK).requestFocus();
    }

    /**
    *    Called when the dialog is closed. Hides the dialog. Override this
    *    to add any cleanup that is necessary, but be sure to call the superclass's
    *    method too.
    */
    protected void closeDialog()
    {
        setVisible(false);
    }

    /**
    *    Called when the OK button is clicked. Default action is to close the dialog
    *    by calling closeDialog(). Override this if custom functionality is needed.
    */
    protected void onOK()
    {
        closeDialog();
    }

    /**
    *    Called when the Cancel button is clicked. Default action is to close the dialog
    *    by calling closeDialog(). Override this if custom functionality is needed.
    */
    protected void onCancel()
    {
        closeDialog();
    }

    /**
    *    Called when a button is clicked. Default action is to do nothing. Override
    *    this to add custom functionality.
    *
    *    @param    buttonID    Resource ID of the button that was clicked.
    *    @param    buttonName    Name of button that was clicked.
    */
    protected void onButton(int buttonID, String buttonName)
    {
    }

    /**
    *    Handles events that occur in the dialog box. Calls onOK() if OK is clicked,
    *    onCancel() if cancel is clicked, and onButton() if any other button is clicked.
    *
    *    @param    evt    Event which is being handled
    *    @returns    true if the event was handled, false if not
    */
    public boolean handleEvent(Event evt)
    {
        if ((evt.target instanceof UIButton) &&
            (evt.id == Event.ACTION_EVENT))
        {
            int buttonID = ((UIButton)evt.target).getID();
            if (buttonID == IDR_FILEOPTIONS_OK)
            {
                onOK();
            }
            else if (buttonID == IDR_FILEOPTIONS_CANCEL)
            {
                onCancel();
            }
            else
            {
                onButton(buttonID, ((UIButton)evt.target).getName());
            }

            return true;
        }

        return super.handleEvent(evt);
    }

}