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375 lines
11 KiB
Java
375 lines
11 KiB
Java
/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is the Grendel mail/news client.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1997
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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package grendel.composition;
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/* Gadget oganization:
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an AttachmentsList has one AttachmentsPanel.
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an AttachmentsPanel has many AttachmentLabel(s).
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*/
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import java.io.Serializable;
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import java.util.*;
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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/*
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*/
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//public class AttachmentsList extends JScrollPane implements Serializable, FocusListener {
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public class AttachmentsList extends JScrollPane implements Serializable {
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private AttachmentsPanel mAP;
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public AttachmentsList () {
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super ();
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//add attachments panel.
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mAP = new AttachmentsPanel ();
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JViewport spViewPort = getViewport();
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spViewPort.add(mAP);
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//keyboard navigation (arrows).
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addKeyListener (mAP);
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// mAP.addFocusListener (this);
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setBackground (Color.white);
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}
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/**
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* Sets this gadgets enabled state.
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* @param aEnabled Boolean value for enabled.
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*/
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public void setEnabled (boolean aEnabled) {
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}
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/**
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* showDialog requests that the AddressList display its file dialog.
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* @see showDialog()
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*/
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public void showDialog () {
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mAP.showDialog ();
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}
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/**
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* Delets all attachments from the list.
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* @see addAttachment
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* @see removeAttachment
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*/
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public void removeAllAttachments () {
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}
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/**
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* Remove an entry at index from the list.
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* @param aIndex The index of the attachment to remove.
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* @see removeAllAttachments
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*/
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public void removeAttachment (int aIndex) {
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}
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/**
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* Adds an attachment to the list.
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* @param aFilePath A file path.
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* @see removeAllAttachments
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*/
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public void addAttachment (String aFilePath) {
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mAP.addAttachment (aFilePath);
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}
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/**
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* Tranverse up a component's tree to find the top most frame.
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* @param aComp the component for which you want its parent frame for.
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* @return The parent frame.
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*/
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public static Frame getTopLevelFrame(Component aComp) {
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Component c = aComp;
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while (null != c.getParent())
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c = c.getParent();
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if (c instanceof Frame)
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return (Frame) c;
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return null;
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}
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//*****************
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/**
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*
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*/
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class AttachmentsPanel extends JPanel implements MouseListener, KeyListener {
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private AttachmentLabel mCurrentSelection;
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public AttachmentsPanel () {
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super ();
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//do your own layout.
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setLayout (null);
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//Get your own mouse events.
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// used to diaply file dialog when mouse down on background.
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addMouseListener (this);
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setBackground (Color.white);
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}
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/**
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* Gets the currently selected label.
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* @return The currently selected label.
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* @see setSelection
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*/
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private AttachmentLabel getSelection () { return mCurrentSelection; }
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/**
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* Sets the currently selected label.
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* @param One of the AttachmentLabel's
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* @see getSelection
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*/
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private void setSelection (AttachmentLabel aLabel) {
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//un-hightlight old.
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if (null != mCurrentSelection) {
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mCurrentSelection.setForeground (Color.black);
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mCurrentSelection.setBackground (Color.white);
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}
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mCurrentSelection = aLabel;
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//highlight new
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if (null != mCurrentSelection) {
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mCurrentSelection.setForeground (Color.white);
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mCurrentSelection.setBackground (Color.blue);
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}
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repaint();
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}
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/**
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* Adds a file attachment to the list.
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* @param aFilePath A file path.
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* @see AttachmentsList.addAttachment
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*/
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protected void addAttachment (String aFilePath) {
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AttachmentLabel fileLabel = new AttachmentLabel (aFilePath);
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add (fileLabel);
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//mouse listener for selection via mouse (click on the line).
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fileLabel.addMouseListener (this);
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//select the newly added attachment.
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setSelection (fileLabel);
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doLayout();
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}
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/**
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* Remove a file attachment from the list.
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*/
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private void removeAttachment (AttachmentLabel aAttLabel) {
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if (null != aAttLabel) {
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remove (aAttLabel);
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//if the AttachmentLabel that's being removed is also the currently
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// selected label then set the current selection to null.
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if (aAttLabel == getSelection())
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setSelection(null);
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//force a re-layout of the labels.
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doLayout();
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}
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}
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/**
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* Remove a file attachment from the list.
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*/
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private void removeAttachment (int aIndex) {
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}
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/**
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*
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*/
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public void doLayout() {
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Graphics g = getGraphics();
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FontMetrics fm = g.getFontMetrics();
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Dimension size = getSize();
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int y, i;
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Component comps[] = getComponents();
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int height = new Double(fm.getHeight() * 1.2).intValue();
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for ( i = 0, y = 0;
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(i < comps.length) && (y < size.height);
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i++, y += fm.getHeight()) {
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AttachmentLabel attLabel = (AttachmentLabel) comps[i];
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attLabel.setBounds(3, y, size.width, height);
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}
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}
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public Dimension getMaximumSize() {
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return getPreferredSize();
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}
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public Dimension getMinimumSize() {
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return getPreferredSize();
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}
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public Dimension getPreferredSize() {
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Graphics g = getGraphics();
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FontMetrics fm = g.getFontMetrics();
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Component comps[] = getComponents();
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int totalHeight = new Double((comps.length + 1) * fm.getHeight() * 1.2).intValue();
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return new Dimension(100, totalHeight);
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}
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/**
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* Display the file dialog so the user can select a file to add to the list.
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* @see this.mousePressed and AttachmentsList.showDialog()
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*/
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protected void showDialog () {
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//get the parent frame for the file dialog.
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Frame parentFrame = getTopLevelFrame(this);
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if (null != parentFrame) {
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FileDialog file = new FileDialog (parentFrame, "Attach File", FileDialog.LOAD);
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file.setFile ("*.*"); //all files.
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file.show(); //show the dialog. This blocks.
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//didi they select a file?
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if (null != file.getFile()) {
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//assemble the full path.
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String fullPath = file.getDirectory() + file.getFile();
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addAttachment (fullPath);
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}
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}
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}
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/**
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*
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*/
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public void mouseEntered (MouseEvent e) {}
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public void mouseExited (MouseEvent e) {}
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public void mouseReleased(MouseEvent e) {}
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public void mouseClicked (MouseEvent e) {}
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//on any mouse click show the popup menu.
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public void mousePressed (MouseEvent e) {
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Component comp = e.getComponent();
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//mouse down on background (this panel) so dispaly file dialog.
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if (comp == this) {
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showDialog ();
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}
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//else mouse down on an AttachmentLabel so select line.
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else if (comp instanceof AttachmentLabel) {
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setSelection ((AttachmentLabel)e.getComponent());
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}
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}
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/**
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* keyPressed responds to up and down arrows keys.
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*/
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//implements KeyListener...
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public void keyReleased (KeyEvent e) {}
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public void keyTyped (KeyEvent e) {}
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public void keyPressed (KeyEvent e) {
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if (KeyEvent.KEY_PRESSED == e.getID()) {
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//delete the selected attachment.
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if (KeyEvent.VK_DELETE == e.getKeyCode()) {
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AttachmentLabel current = getSelection();
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if (null != current)
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removeAttachment (current);
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}
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//else arrow up or down (change selection)
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else if ((KeyEvent.VK_UP == e.getKeyCode()) ||
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(KeyEvent.VK_DOWN == e.getKeyCode()))
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{
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//get the currently selected attachment and all attachments.
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AttachmentLabel current = getSelection();
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Component comps[] = getComponents();
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int i = 0;
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//find the index of the current attachment
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for (i = 0; i < comps.length; i++) {
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if (current == (AttachmentLabel) comps[i])
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break;
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}
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//leave if not found.
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if (i == comps.length)
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return;
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//increment/decrement
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if (KeyEvent.VK_UP == e.getKeyCode())
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i += comps.length -1;
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else //(KeyEvent.VK_DOWN == e.getKeyCode())
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i += comps.length +1;
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//select next and wrap using the modulus.
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setSelection ((AttachmentLabel) comps[i % comps.length]);
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}
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}
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}
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}
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//*****************
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/** An AttachmentLabel displays the file name.
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*/
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class AttachmentLabel extends JLabel {
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AttachmentLabel (String aLabel) {
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super (aLabel);
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}
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/**
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* Processes all Mouse events
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*/
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public void processMouseEvent(MouseEvent e) {
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switch(e.getID()) {
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case MouseEvent.MOUSE_PRESSED:
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requestFocus();
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break;
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case MouseEvent.MOUSE_RELEASED:
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break;
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case MouseEvent.MOUSE_EXITED:
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break;
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}
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super.processMouseEvent(e);
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}
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public void paint (Graphics g) {
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Dimension size = getSize();
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FontMetrics fm = g.getFontMetrics();
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g.setColor (getBackground());
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g.fillRect (0, 0, size.width, size.height);
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g.setColor (getForeground());
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g.drawString (getText(), 0, fm.getHeight());
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}
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}
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}
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