Application: gvSIG desktop » Library: org.gvsig.tools

package org.gvsig.tools.swing.impl;

import java.awt.Color;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JColorChooser;

import javax.swing.JSlider;

import javax.swing.SwingUtilities;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import javax.swing.text.JTextComponent;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.i18n.I18nManager;

import org.gvsig.tools.swing.api.ColorChooserController;

import org.gvsig.tools.swing.api.ToolsSwingLocator;

import org.gvsig.tools.swing.api.ToolsSwingManager;

public class DefaultColorChooserController implements ColorChooserController {

    private final JTextComponent txtLabel;

    private final JButton btnShowDialog;

    private final JSlider sldAlpha;

    private Color color;

    private boolean allowNull;

    private ChangeListener changeListener;

    public DefaultColorChooserController(JTextComponent txtLabel, JButton btnShowDialog, JSlider sldAlpha, boolean allowNull) {

        this.txtLabel = txtLabel;

        this.btnShowDialog = btnShowDialog;

        this.sldAlpha = sldAlpha;

        // Remove the listeners to prevent strange behavior when you call this

        // class repeatedly with the same button and slider.

        for(ActionListener l : btnShowDialog.getActionListeners()) {

            btnShowDialog.removeActionListener(l);

        }

        for( ChangeListener l : sldAlpha.getChangeListeners()) {

            sldAlpha.removeChangeListener(l);

        }

        this.btnShowDialog.addActionListener((ActionEvent e) -> {

          doShowDialog();

        });

        if( this.sldAlpha != null ) {

            this.sldAlpha.setMinimum(0);

            this.sldAlpha.setMaximum(255);

            this.sldAlpha.addChangeListener((ChangeEvent e) -> {

              doAlphaChanged();

            });

        }

        Font font = this.txtLabel.getFont();

        try {

            font = new Font(Font.MONOSPACED, Font.PLAIN, font.getSize());

            this.txtLabel.setFont(font);

        } catch(Exception ex) {

            // If dont set a monospaced font ignore it.

            font = null;

        }

        this.allowNull = allowNull;

        if( !this.allowNull ) {

            this.color = Color.BLACK;

        }

    }

    public DefaultColorChooserController(JTextComponent txtLabel, JButton btnShowDialog) {

        this(txtLabel, btnShowDialog, null, false);

    }

    public DefaultColorChooserController(JTextComponent txtLabel, JButton btnShowDialog, JSlider sldAlpha) {

        this(txtLabel, btnShowDialog, sldAlpha, false);

    }

    private void doAlphaChanged() {

        if( this.color == null ) {

            set(Color.BLACK);

        }

        int alpha = 255;

        if( this.sldAlpha == null ) {

            set(new Color(

                color.getRed(),

                color.getGreen(),

                color.getBlue()

            ));

        } else {

            alpha = this.sldAlpha.getValue();

            set(new Color(

                color.getRed(),

                color.getGreen(),

                color.getBlue(),

                alpha

            ));

        }

    }

    @Override

    public void addChangeListener(ChangeListener changeListener) {

        this.changeListener = changeListener;

    }

    protected void fireChanged() {

        if( this.changeListener != null ) {

            this.changeListener.stateChanged(null);

        }

    }

    protected void doShowDialog() {

        I18nManager i18n = ToolsLocator.getI18nManager();

        Color c = JColorChooser.showDialog(

            SwingUtilities.windowForComponent(this.btnShowDialog),

            i18n.getTranslation("choose_color"),

            this.get()

        );

        if( c == null ) {

            return;

        }

        set(c);

    }

    @Override

    public void set(Color color) {

        if( color == null ) {

            if( allowNull ) {

                this.color = null;

                return;

            }

            color = Color.BLACK;

        }

        ToolsSwingManager manager = ToolsSwingLocator.getToolsSwingManager();

        this.color = color;

        String text = String.format("%02x %02x%02x%02x",color.getAlpha(),color.getRed(),color.getGreen(),color.getBlue());

        this.txtLabel.setBackground(manager.opaqueColor(this.color));

        this.txtLabel.setText(text);

        if( this.sldAlpha != null ) {

            this.sldAlpha.setValue(this.color.getAlpha());

        }

        this.txtLabel.invalidate();

    }

    @Override

    public Color get() {

        return this.color;

    }

    @Override

    public void setEnabled(boolean enabled) {

        this.txtLabel.setEditable(enabled);

        this.btnShowDialog.setEnabled(enabled);

        if( this.sldAlpha!=null ) {

            this.sldAlpha.setEnabled(enabled);

        }

    }

    @Override

    public boolean isEnabled() {

        return this.btnShowDialog.isEnabled();

    }

}