Code for Wiggly Example
/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of Qt Jambi.
**
** ** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
package com.trolltech.examples;
import com.trolltech.qt.core.*;
import com.trolltech.qt.gui.*;
class WigglyWidget extends QWidget {
static final int sineTable[] = { 0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38 };
private QBasicTimer timer;
private String text;
private int step;
WigglyWidget(QWidget parent) {
super(parent);
setBackgroundRole(QPalette.ColorRole.Midlight);
QFont newFont = font();
newFont.setPointSize(newFont.pointSize() + 20);
setFont(newFont);
step = 0;
timer = new QBasicTimer();
timer.start(60, this);
}
public void setText(String s) {
text = s;
}
@Override
protected void paintEvent(QPaintEvent e) {
QFontMetrics metrics = new QFontMetrics(font());
int x = (width() - metrics.width(text)) / 2;
int y = (height() + metrics.ascent() - metrics.descent()) / 2;
QColor color = new QColor();
QPainter painter = new QPainter();
painter.begin(this);
for (int i = 0; i < text.length(); ++i) {
int index = (step + i) % 16;
color.setHsv((15 - index) * 16, 255, 191);
painter.setPen(color);
painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400), text.substring(i, i + 1));
x += metrics.width(text.substring(i, i + 1));
}
painter.end();
}
@Override
protected void timerEvent(QTimerEvent event) {
if (event.timerId() == timer.timerId()) {
++step;
update();
} else {
super.timerEvent(event);
}
}
}
@QtJambiExample(name = "Wiggly")
public class Wiggly extends QDialog {
public Wiggly(QWidget parent) {
super(parent);
WigglyWidget wigglyWidget = new WigglyWidget(null);
QLineEdit lineEdit = new QLineEdit();
QVBoxLayout layout = new QVBoxLayout();
layout.addWidget(wigglyWidget);
layout.addWidget(lineEdit);
setLayout(layout);
lineEdit.textChanged.connect(wigglyWidget, "setText(String)");
lineEdit.setText("Hello world!");
setWindowTitle("Wiggly");
setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));
resize(360, 145);
}
public static void main(String args[]) {
QApplication.initialize(args);
Wiggly d = new Wiggly(null);
d.show();
QApplication.exec();
}
}