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package imaging.framework;
import java.awt.*;
import java.awt.image.*;
class DialogManager
{
public static void popDialog (int type, String message)
{
Frame frame = null;
switch (type)
{
case DialogType.ABOUT:
frame = new AboutFrame ();
break;
case DialogType.MALFORMED_URL:
case DialogType.NOT_SUPPORTED:
case DialogType.URL_NOT_FOUND:
frame = new MessageFrame ("Error", message);
break;
case DialogType.NOT_YET_IMPLEMENTED:
frame = new MessageFrame ("", message);
break;
}
Dimension d = Toolkit.getDefaultToolkit ().getScreenSize ();
frame.move ((d.width - frame.size ().width)/2,
(d.height - frame.size ().height)/2);
frame.show ();
}
}
class MessageFrame extends Frame
{
public MessageFrame (String title, String message)
{
super (title);
this.resize (message.length () * 8, 100);
this.setLayout (new BorderLayout ());
this.text_ = new TextField (message);
this.text_.setEditable (false);
Panel okButtonPanel = new Panel ();
okButtonPanel.add (this.okButton_);
okButtonPanel.resize (100, 100);
this.add ("Center", this.text_);
this.add ("South", okButtonPanel);
}
public boolean handleEvent (Event evt)
{
if (evt.id == Event.WINDOW_DESTROY)
{
this.dispose ();
return true;
}
return super.handleEvent (evt);
}
// Handle all action events
public boolean action (Event e, Object arg)
{
if (e.target instanceof Button)
{
if (e.target == this.okButton_)
{
this.dispose ();
}
return true;
}
else
return false;
}
private Button okButton_ = new Button (" ok ");
private TextField text_ = null;
}
class AboutFrame extends Frame
{
public AboutFrame ()
{
super ("About");
this.setText ();
this.resize (500,700);
this.setLayout (new BorderLayout ());
Panel okButtonPanel = new Panel ();
okButtonPanel.add (this.okButton_);
this.add ("South", okButtonPanel);
}
public void paint (Graphics g)
{
g.clearRect (0, 0, this.size ().width, this.size ().height);
g.setFont (new Font ("TimesRoman", Font.PLAIN, 18));
this.setBackground (Color.white);
int x = 20;
int y = 100;
for (int i = 0; i < AboutFrame.MAXROWS; i++)
{
g.drawString(this.text_[i], x, y);
y += g.getFont ().getSize () + 5;
}
}
// Handle window destroy events
public boolean handleEvent (Event evt)
{
if (evt.id == Event.WINDOW_DESTROY)
{
this.dispose ();
return true;
}
return super.handleEvent (evt);
}
// Handle all action events
public boolean action (Event e, Object arg)
{
if (e.target instanceof Button)
{
if (e.target == this.okButton_)
{
this.dispose ();
}
return true;
}
else
return false;
}
private void setText ()
{
text_[0] = "This is a prototype of a large scale distributed medical";
text_[1] = "imaging system. It has been developed using Java, in";
text_[2] = "particular, several components of Java ACE.";
text_[3] = "";
text_[4] = "The prototype allows images to be downloaded across the";
text_[5] = "network. It then provides several filters that can be";
text_[6] = "used to do image processing. The image filters are";
text_[7] = "configured into the system dynamically using the Service";
text_[8] = "Configurator pattern. In the current implementation, the";
text_[9] = "filters are specified via a configuration file located at";
text_[10] = "server. The file can be modified at runtime to add";
text_[11] = "additional filters or to remove some filters. This allows";
text_[12] = "filters to be configured and reconfigured dynamically.";
text_[13] = "";
text_[14] = "Currently, images can not be uploaded. This is mainly due";
text_[15] = "to security restrictions imposed by current servers. Our";
text_[16] = "goal is to use the prototpe in conjunction with JAWS, an";
text_[17] = "adaptive web server we are currently developing in which we";
text_[18] = "plan to provide support for image uploading.";
text_[19] = "";
text_[20] = "For more information about this prototype, please contact";
text_[21] = "Prashant Jain (pjain@cs.wustl.edu).";
}
private final static int MAXROWS = 22;
private Button okButton_ = new Button (" ok ");
private TextArea textArea_ = null;
private String [] text_ = new String [AboutFrame.MAXROWS];
}
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