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/* |
/* |
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* JSampler - a java front-end for LinuxSampler |
* JSampler - a java front-end for LinuxSampler |
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* |
* |
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* Copyright (C) 2005 Grigor Kirilov Iliev |
* Copyright (C) 2005-2008 Grigor Iliev <grigor@grigoriliev.com> |
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* |
* |
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* This file is part of JSampler. |
* This file is part of JSampler. |
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* |
* |
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import java.awt.Font; |
import java.awt.Font; |
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import java.awt.Frame; |
import java.awt.Frame; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.util.logging.Level; |
import java.util.logging.Level; |
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import javax.swing.JOptionPane; |
import javax.swing.JOptionPane; |
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/** |
/** |
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* |
* This class contains some helper function. |
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* @author Grigor Iliev |
* @author Grigor Iliev |
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*/ |
*/ |
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public class HF { |
public class HF { |
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// GUI HELPER FUNCIONS |
// GUI HELPER FUNCIONS |
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/** |
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* Returns more meaningful, non-<code>null</code> message. |
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* @return More meaningful, non-<code>null</code> message. |
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*/ |
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public static String |
public static String |
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getErrorMessage(Exception e) { |
getErrorMessage(Exception e) { |
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String msg = e.getMessage(); |
String msg = e.getMessage(); |
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return msg; |
return msg; |
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} |
} |
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/** |
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* Shows a dialog with the specified error message. |
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* @param msg The error message to be shown. |
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*/ |
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public static void |
public static void |
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showErrorMessage(String msg) { showErrorMessage(msg, CC.getMainFrame()); } |
showErrorMessage(String msg) { showErrorMessage(msg, CC.getMainFrame()); } |
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/** |
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* Shows a dialog with the specified error message. |
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* @param parentComponent determines the Frame in which the dialog is displayed |
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* @param msg The error message to be shown. |
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*/ |
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public static void |
public static void |
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showErrorMessage(String msg, Frame frame) { |
showErrorMessage(String msg, Component parentComponent) { |
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JOptionPane.showMessageDialog ( |
JOptionPane.showMessageDialog ( |
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frame, msg, |
parentComponent, msg, |
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i18n.getError("error"), |
i18n.getError("error"), |
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JOptionPane.ERROR_MESSAGE |
JOptionPane.ERROR_MESSAGE |
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); |
); |
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} |
} |
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/** |
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* Shows a dialog with error message obtained by {@link #getErrorMessage} method. |
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* @param e The <code>Exception</code> from which the error message is obtained. |
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*/ |
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public static void |
public static void |
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showErrorMessage(String msg, Dialog dlg) { |
showErrorMessage(Exception e) { showErrorMessage(e, CC.getMainFrame()); } |
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JOptionPane.showMessageDialog ( |
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dlg, msg, |
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i18n.getError("error"), |
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JOptionPane.ERROR_MESSAGE |
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); |
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} |
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/** |
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* Shows a dialog with error message obtained by {@link #getErrorMessage} method. |
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* @param e The <code>Exception</code> from which the error message is obtained. |
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* @param prefix The prefix to be added to the error message. |
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*/ |
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public static void |
public static void |
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showErrorMessage(Exception e) { showErrorMessage(e, CC.getMainFrame()); } |
showErrorMessage(Exception e, String prefix) { |
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showErrorMessage(e, CC.getMainFrame(), prefix); |
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} |
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/** |
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* Shows a dialog with error message obtained by {@link #getErrorMessage} method. |
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* @param e The <code>Exception</code> from which the error message is obtained. |
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* @param frame The parent <code>Frame</code> for the dialog. |
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*/ |
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public static void |
public static void |
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showErrorMessage(Exception e, Frame frame) { |
showErrorMessage(Exception e, Frame frame) { |
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String msg = getErrorMessage(e); |
showErrorMessage(e, frame, ""); |
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} |
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/** |
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* Shows a dialog with error message obtained by {@link #getErrorMessage} method. |
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* @param e The <code>Exception</code> from which the error message is obtained. |
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* @param frame The parent <code>Frame</code> for the dialog. |
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* @param prefix The prefix to be added to the error message. |
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*/ |
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public static void |
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showErrorMessage(Exception e, Frame frame, String prefix) { |
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String msg = prefix + getErrorMessage(e); |
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CC.getLogger().log(Level.INFO, msg, e); |
CC.getLogger().log(Level.INFO, msg, e); |
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); |
); |
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} |
} |
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/** |
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* Shows a dialog with error message obtained by {@link #getErrorMessage} method. |
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* @param e The <code>Exception</code> from which the error message is obtained. |
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* @param dlg The parent <code>Dialog</code> from which the dialog is displayed. |
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*/ |
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public static void |
public static void |
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showErrorMessage(Exception e, Dialog dlg) { |
showErrorMessage(Exception e, Dialog dlg) { |
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String msg = getErrorMessage(e); |
String msg = getErrorMessage(e); |
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CC.getLogger().log(Level.INFO, msg, e); |
CC.getLogger().log(Level.INFO, msg, e); |
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JOptionPane.showMessageDialog ( |
JOptionPane.showMessageDialog ( |
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dlg, msg, |
dlg, msg, |
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i18n.getError("error"), |
i18n.getError("error"), |
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/** |
/** |
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* Brings up a question dialog with Yes, No options, empty title and the specified message. |
* Brings up a question dialog with Yes, No options, empty title and the specified message. |
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* |
* @param parent The parent <code>Component</code> for the dialog. |
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* @param message The message to display. |
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* @return <code>true</code> if the user chooses "yes", <code>false</code> otherwise. |
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*/ |
*/ |
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public static boolean |
public static boolean |
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showYesNoDialog(Component parent, String message) { |
showYesNoDialog(Component parent, String message) { |
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return showYesNoDialog(parent, message, ""); |
return showYesNoDialog(parent, message, ""); |
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} |
} |
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/** |
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* Brings up a question dialog with Yes, No options, empty title and the specified message. |
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* @param parent The parent <code>Component</code> for the dialog. |
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* @param message The message to display. |
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* @param title The dialog's title. |
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* @return <code>true</code> if the user chooses "yes", <code>false</code> otherwise. |
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*/ |
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public static boolean |
public static boolean |
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showYesNoDialog(Component parent, String message, String title) { |
showYesNoDialog(Component parent, String message, String title) { |
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Object[] options = { i18n.getButtonLabel("yes"), i18n.getButtonLabel("no") }; |
Object[] options = { i18n.getButtonLabel("yes"), i18n.getButtonLabel("no") }; |
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return n == 0; |
return n == 0; |
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} |
} |
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/** |
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* Sets the default font to be used in the GUI. |
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* @param fontName The name of the font to be used as default. |
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*/ |
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public static void |
public static void |
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setUIDefaultFont(String fontName) { |
setUIDefaultFont(String fontName) { |
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if(fontName == null) return; |
if(fontName == null) return; |
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} |
} |
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} |
} |
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/////// |
/////// |
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/** |
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* Deletes the specified file, if exists and |
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* is located in the JSampler's home directory. |
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* @param file The file to delete. |
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*/ |
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public static void |
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deleteFile(String file) { |
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String s = CC.getJSamplerHome(); |
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if(s == null) return; |
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try { |
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File f = new File(s + File.separator + file); |
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if(f.isFile()) f.delete(); |
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} catch(Exception x) { |
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CC.getLogger().log(Level.INFO, getErrorMessage(x), x); |
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} |
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} |
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/** |
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* Create a backup copy of the specified file, located in the JSampler's home directory. |
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* @param file The name of the file to backup. |
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* @param bkpFile The backup name of the file. |
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* @return <code>true</code> if the file is backuped successfully. |
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*/ |
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public static boolean |
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createBackup(String file, String bkpFile) { |
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if(file == null || bkpFile == null) return false; |
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if(file.length() == 0 || bkpFile.length() == 0) return false; |
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String s = CC.getJSamplerHome(); |
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if(s == null) return false; |
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File f = new File(s + File.separator + file); |
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if(!f.isFile()) return false; |
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try { |
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FileInputStream fis = new FileInputStream(s + File.separator + file); |
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FileOutputStream fos; |
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fos = new FileOutputStream(s + File.separator + bkpFile, false); |
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int i = fis.read(); |
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while(i != -1) { |
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fos.write(i); |
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i = fis.read(); |
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} |
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} catch(Exception x) { |
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CC.getLogger().log(Level.INFO, getErrorMessage(x), x); |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Converts the volume value specified in percents to decibels. |
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*/ |
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public static double |
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percentsToDecibels(int vol) { |
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if(vol == 0) return Double.NEGATIVE_INFINITY; |
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double i = vol; |
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i /= 100; |
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i = 20 * Math.log10(i); |
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return i; |
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} |
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/** |
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* Converts the volume value specified in decibels to percents. |
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*/ |
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public static int |
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decibelsToPercents(double vol) { |
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if(vol == Double.NEGATIVE_INFINITY) return 0; |
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double i = Math.pow(10, vol/20); |
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i *= 100; |
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return (int)i; |
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} |
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/** |
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* Converts the volume value specified in decibels to volume factor. |
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*/ |
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public static float |
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decibelsToFactor(double vol) { |
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if(vol == Double.NEGATIVE_INFINITY) return 0; |
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double i = Math.pow(10, vol/20); |
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return (float)i; |
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} |
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/** |
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* Converts the volume value specified in percents to volume factor. |
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*/ |
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public static float |
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percentsToFactor(int vol) { |
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float f = vol; |
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f /= 100; |
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return f; |
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} |
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} |
} |