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/*
* MapToArbitraryPaletteDialog
*
* Copyright (c) 2001, 2002 Marco Schmidt.
* All rights reserved.
*/
package net.sourceforge.jiu.gui.awt.dialogs;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Checkbox;
import java.awt.CheckboxGroup;
import java.awt.Choice;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import net.sourceforge.jiu.apps.Strings;
import net.sourceforge.jiu.color.dithering.ErrorDiffusionDithering;
/**
* A dialog to enter the parameters for an operation to map an RGB truecolor
* image to any given palette.
*
* @since 0.5.0
* @author Marco Schmidt
* @see net.sourceforge.jiu.color.quantization.ArbitraryPaletteQuantizer
*/
public class MapToArbitraryPaletteDialog extends Dialog implements
ActionListener
{
public static final int PALETTE_FILE = 0;
public static final int PALETTE_WEBSAFE = 1;
public static final int PALETTE_PALM_256_COLORS = 2;
public static final int PALETTE_PALM_16_COLORS = 3;
public static final int PALETTE_PALM_16_GRAY = 4;
public static final int PALETTE_PALM_4_GRAY = 5;
public static final int NUM_PALETTE_TYPES = 6;
private static final int[] PALETTE_STRING_CONSTANTS =
{
Strings.PALETTE_FROM_FILE,
Strings.WEBSAFE_PALETTE,
Strings.PALETTE_PALM_256_COLORS,
Strings.PALETTE_PALM_16_COLORS,
Strings.PALETTE_PALM_16_GRAY,
Strings.PALETTE_PALM_4_GRAY,
};
private static final int[] DITHERING_STRING_CONSTANTS =
{
Strings.DITHERING_NONE,
Strings.FLOYD_STEINBERG_ERROR_DIFFUSION,
Strings.STUCKI_ERROR_DIFFUSION,
Strings.BURKES_ERROR_DIFFUSION,
Strings.SIERRA_ERROR_DIFFUSION,
Strings.JARVIS_JUDICE_NINKE_ERROR_DIFFUSION,
Strings.STEVENSON_ARCE_ERROR_DIFFUSION
};
private static final int[] ERROR_DIFFUSION_TYPES =
{
ErrorDiffusionDithering.TYPE_FLOYD_STEINBERG,
ErrorDiffusionDithering.TYPE_STUCKI,
ErrorDiffusionDithering.TYPE_BURKES,
ErrorDiffusionDithering.TYPE_SIERRA,
ErrorDiffusionDithering.TYPE_JARVIS_JUDICE_NINKE,
ErrorDiffusionDithering.TYPE_STEVENSON_ARCE
};
private Button ok;
private Button cancel;
private Checkbox[] checkboxes;
private CheckboxGroup paletteType;
private Choice dithering;
private boolean pressedOk;
/**
* @param owner the Frame this dialog will belong to
*/
public MapToArbitraryPaletteDialog(Frame owner, Strings strings)
{
super(owner, strings.get(Strings.MAP_TO_ARBITRARY_PALETTE), true);
pressedOk = false;
// 1 (CENTER) main panel with components for the various options
Panel mainPanel = new Panel(new GridLayout(0, 1));
// 1.1 Label with message text
Panel panel = new Panel(new GridLayout(0, 1));
panel.add(new Label(strings.get(Strings.CHOOSE_PALETTE_TYPE)));
mainPanel.add(panel);
// 1.2 radio buttons (CheckboxGroup) with palette type
panel = new Panel(new GridLayout(0, 1));
paletteType = new CheckboxGroup();
checkboxes = new Checkbox[PALETTE_STRING_CONSTANTS.length];
boolean selected = true;
for (int i = 0; i < NUM_PALETTE_TYPES; i++)
{
checkboxes[i] = new Checkbox(strings.get(PALETTE_STRING_CONSTANTS[i]), paletteType, selected);
selected = false;
panel.add(checkboxes[i]);
}
mainPanel.add(panel);
// 1.3 Choice with dithering types
panel = new Panel();
panel.add(new Label(strings.get(Strings.DITHERING_METHOD)));
dithering = new Choice();
for (int i = 0; i < DITHERING_STRING_CONSTANTS.length; i++)
{
dithering.add(strings.get(DITHERING_STRING_CONSTANTS[i]));
}
dithering.select(1);
panel.add(dithering);
mainPanel.add(panel);
add(mainPanel, BorderLayout.CENTER);
// 2 (SOUTH) buttons OK and Cancel
panel = new Panel();
// 2.1 OK button
ok = new Button(strings.get(Strings.OK));
ok.addActionListener(this);
panel.add(ok);
// 2.2 Cancel button
cancel = new Button(strings.get(Strings.CANCEL));
cancel.addActionListener(this);
panel.add(cancel);
add(panel, BorderLayout.SOUTH);
pack();
Dialogs.center(this);
}
/**
* Hides (closes) this dialog if the OK button was source of the action event
* (e.g. if the button was pressed).
*/
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == ok)
{
pressedOk = true;
setVisible(false);
}
else
if (e.getSource() == cancel)
{
setVisible(false);
}
}
/**
* If the use of error diffusion was selected, this method
* returns on of the ErrorDiffusionDithering TYPE constants
*/
public int getErrorDiffusionType()
{
int sel = dithering.getSelectedIndex();
if (sel > 0 && sel <= ERROR_DIFFUSION_TYPES.length)
{
return ERROR_DIFFUSION_TYPES[sel - 1];
}
else
{
return -1;
}
}
/**
* Return the palette type (one of the PALETTE_xyz constants of this class)
* that is currently selected in the dialog.
*/
public int getPaletteType()
{
for (int i = 0; i < checkboxes.length; i++)
{
if (checkboxes[i].getState())
{
return i;
}
}
return -1;
}
/**
* Returns true if the OK button was pressed, false if
* it was the Cancel button.
*/
public boolean hasPressedOk()
{
return pressedOk;
}
/**
* Returns whether the use of one of the error diffusion
* algorithms is selected in the dialog.
*/
public boolean useErrorDiffusion()
{
return dithering.getSelectedIndex() > 0;
}
}
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