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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>JDragNDrop - /MyView.java</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
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<!-- START CENTER OPEN -->
<center>
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<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
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<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Cocoa/index.html">Cocoa</a> > <a href="../../samplecode/Cocoa/idxJava-date.html">Java</a> > <A HREF="javascript:location.replace('index.html');">JDragNDrop</A> >
</td>
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<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
</div>
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<div style="width:100%; position:fixed;"><div align="center" id="watermark" style="position: relative; margin-left:auto; margin-right:auto; z-index:20; width:500px;"><div class="legacybox"><h1>Not Recommended Document<span class=closebutton><a href="javascript:closeWatermark()"><img src="../../images/closebutton.png" width="14" height="14" border="0" alt="close button"></a></span></h1>
<p><strong>Important: </strong>The information in this document is <strong>Not Recommended</strong> and should not be used for new development.</p>
<div class="reflibtopic">
<p>Current information on this Reference Library topic can be found here:</p>
<ul>
<li><a href="http://developer.apple.com/referencelibrary/Cocoa/idxJava-date.html" target="_blank">Cocoa > Java</a></li>
</ul>
</div>
</div></div></div>
<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">JDragNDrop</div></h1></td>
</tr>
</table>
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td id="scdetails">
<h2>/MyView.java</h2>
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<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/main.m</option>
<option value="listing2.html">/MyView.java</option></select>
</p>
</form>
<p><strong><a href="JDragNDrop.zip">Download Sample</a></strong> (“JDragNDrop.zip”, 24.1K)<BR>
<strong><a href="JDragNDrop.dmg">Download Sample</a></strong> (“JDragNDrop.dmg”, 83.6K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
-->
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<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
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<!--googleon: index -->
<pre class="sourcecodebox">/*
MyView.java
JDragNDrop
Author: Sandeep Parikh (parikhs)
Created July 26, 2001
Copyright (c) 2001 by Apple Computer, Inc., all rights reserved.
IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
consideration of your agreement to the following terms, and your use, installation,
modification or redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject to these
terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in
this original Apple software (the "Apple Software"), to use, reproduce, modify and
redistribute the Apple Software, with or without modifications, in source and/or binary
forms; provided that if you redistribute the Apple Software in its entirety and without
modifications, you must retain this notice and the following text and disclaimers in all
such redistributions of the Apple Software. Neither the name, trademarks, service marks
or logos of Apple Computer, Inc. may be used to endorse or promote products derived from
the Apple Software without specific prior written permission from Apple. Except as expressly
stated in this notice, no other rights or licenses, express or implied, are granted by Apple
herein, including but not limited to any patent rights that may be infringed by your
derivative works or by other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS
USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND
WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR
OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import com.apple.cocoa.foundation.*;
import com.apple.cocoa.application.*;
public class MyView extends NSView {
// these are the Interface elements to feed information to...
private NSTextField filename;
private NSImageView iconwell;
// override constructor to add dragging registration
public MyView(NSRect frame) {
super(frame);
// register for drag and drop type - filenames...
NSMutableArray dragTypesArray = new NSMutableArray();
dragTypesArray.addObject(NSPasteboard.FilenamesPboardType);
registerForDraggedTypes((NSArray) dragTypesArray);
}
// draw background and fill in color
public void drawRect(NSRect rect) {
NSColor myColor = new NSColor();
NSBezierPath myBezierPath = new NSBezierPath();
myColor.windowBackgroundColor().set();
myBezierPath.fillRect(this.bounds());
}
public String validateDrag(NSDraggingInfo sender) {
// if the source of the drag operation does not originate from this view...
if(sender.draggingSource() != this) {
// get the pasteboard and get the type of item dropped
NSPasteboard pb = sender.draggingPasteboard();
String type = pb.availableTypeFromArray(new NSArray(NSPasteboard.FilenamesPboardType));
// if type exists return the string for it else return null
if(type != null) {
return pb.stringForType(type);
}
}
return null;
}
public int draggingEntered(NSDraggingInfo sender) {
// if drag operation is valid, let the pasteboard know
// the app is only copying the type (filename in this case)
if(validateDrag(sender) != null) {
return NSDraggingInfo.DragOperationCopy;
}
// else return no operation
return NSDraggingInfo.DragOperationNone;
}
public int draggingUpdated(NSDraggingInfo sender) {
// if drag operation is valid, let the pasteboard know
// the app is only copying the type (filename in this case)
if(validateDrag(sender) != null) {
return NSDraggingInfo.DragOperationCopy;
}
// else return no operation
return NSDraggingInfo.DragOperationNone;
}
public void draggingExited(NSDraggingInfo sender) {
// once drag operation exits window, set display to view again...
this.setNeedsDisplay(true);
}
public boolean prepareForDragOperation(NSDraggingInfo sender) {
// if dragging is valid, let the pasteboard know the app is prepared
if(validateDrag(sender) != null) {
return true;
}
return false;
}
public boolean performDragOperation(NSDraggingInfo sender) {
// if dragging is valid, let the pasteboard know the app is performing operation
if(validateDrag(sender) != null) {
return true;
}
return false;
}
public void concludeDragOperation(NSDraggingInfo sender) {
// create a new NSPasteboard object to confirm type of dropped item
NSPasteboard pboard = sender.draggingPasteboard();
NSMutableArray pArray = new NSMutableArray();
pArray.addObject(NSPasteboard.FilenamesPboardType);
// check type to make sure it conforms with type you registered
String type = pboard.availableTypeFromArray((NSArray) pArray);
// if type of item is dropped is File/Folder
if (type.equalsIgnoreCase(NSPasteboard.FilenamesPboardType)) {
// get the list of all files/folders dropped
NSArray filenames = (NSArray) pboard.propertyListForType(NSPasteboard.FilenamesPboardType);
// NSFileWrapper is useful for getting the icon of the dropped item
NSFileWrapper droppedFile = new NSFileWrapper((String)filenames.lastObject(), false);
// this will set filename to the full path of the dropped item
filename.setStringValue((String)filenames.objectAtIndex(0));
// this will set the icon to the icon of the file/folder dropped
iconwell.setImage(droppedFile.icon());
}
else {
NSAlertPanel alert = new NSAlertPanel();
alert.runAlert("Incorrect Type", "The view has not registered for this drag type", null, null, null);
}
}
}
</pre>
<!--googleoff: index -->
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