--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/demo/share/applets/ArcTest/ArcTest.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of Oracle nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This source code is provided to illustrate the usage of a given feature
+ * or technique and has been deliberately simplified. Additional steps
+ * required for a production-quality application, such as security checks,
+ * input validation and proper error handling, might not be present in
+ * this sample code.
+ */
+
+
+
+import java.awt.*;
+import java.awt.event.*;
+import java.applet.*;
+
+
+/**
+ * An interactive test of the Graphics.drawArc and Graphics.fillArc
+ * routines. Can be run either as a standalone application by
+ * typing "java ArcTest" or as an applet in the AppletViewer.
+ */
+@SuppressWarnings("serial")
+public class ArcTest extends Applet {
+
+ ArcControls controls; // The controls for marking and filling arcs
+ ArcCanvas canvas; // The drawing area to display arcs
+
+ @Override
+ public void init() {
+ setLayout(new BorderLayout());
+ canvas = new ArcCanvas();
+ add("Center", canvas);
+ add("South", controls = new ArcControls(canvas));
+ }
+
+ @Override
+ public void destroy() {
+ remove(controls);
+ remove(canvas);
+ }
+
+ @Override
+ public void start() {
+ controls.setEnabled(true);
+ }
+
+ @Override
+ public void stop() {
+ controls.setEnabled(false);
+ }
+
+ @Override
+ public void processEvent(AWTEvent e) {
+ if (e.getID() == Event.WINDOW_DESTROY) {
+ System.exit(0);
+ }
+ }
+
+ public static void main(String args[]) {
+ Frame f = new Frame("ArcTest");
+ ArcTest arcTest = new ArcTest();
+
+ arcTest.init();
+ arcTest.start();
+
+ f.add("Center", arcTest);
+ f.setSize(300, 300);
+ f.setVisible(true);
+ }
+
+ @Override
+ public String getAppletInfo() {
+ return "An interactive test of the Graphics.drawArc and \nGraphics."
+ + "fillArc routines. Can be run \neither as a standalone "
+ + "application by typing 'java ArcTest' \nor as an applet in "
+ + "the AppletViewer.";
+ }
+}
+
+
+@SuppressWarnings("serial")
+class ArcCanvas extends Canvas {
+
+ int startAngle = 0;
+ int extent = 45;
+ boolean filled = false;
+ Font font = new java.awt.Font("SansSerif", Font.PLAIN, 12);
+
+ @Override
+ public void paint(Graphics g) {
+ Rectangle r = getBounds();
+ int hlines = r.height / 10;
+ int vlines = r.width / 10;
+
+ g.setColor(Color.pink);
+ for (int i = 1; i <= hlines; i++) {
+ g.drawLine(0, i * 10, r.width, i * 10);
+ }
+ for (int i = 1; i <= vlines; i++) {
+ g.drawLine(i * 10, 0, i * 10, r.height);
+ }
+
+ g.setColor(Color.red);
+ if (filled) {
+ g.fillArc(0, 0, r.width - 1, r.height - 1, startAngle, extent);
+ } else {
+ g.drawArc(0, 0, r.width - 1, r.height - 1, startAngle, extent);
+ }
+
+ g.setColor(Color.black);
+ g.setFont(font);
+ g.drawLine(0, r.height / 2, r.width, r.height / 2);
+ g.drawLine(r.width / 2, 0, r.width / 2, r.height);
+ g.drawLine(0, 0, r.width, r.height);
+ g.drawLine(r.width, 0, 0, r.height);
+ int sx = 10;
+ int sy = r.height - 28;
+ g.drawString("Start = " + startAngle, sx, sy);
+ g.drawString("Extent = " + extent, sx, sy + 14);
+ }
+
+ public void redraw(boolean filled, int start, int extent) {
+ this.filled = filled;
+ this.startAngle = start;
+ this.extent = extent;
+ repaint();
+ }
+}
+
+
+@SuppressWarnings("serial")
+class ArcControls extends Panel
+ implements ActionListener {
+
+ TextField startTF;
+ TextField extentTF;
+ ArcCanvas canvas;
+
+ @SuppressWarnings("LeakingThisInConstructor")
+ public ArcControls(ArcCanvas canvas) {
+ Button b = null;
+
+ this.canvas = canvas;
+ add(startTF = new IntegerTextField("0", 4));
+ add(extentTF = new IntegerTextField("45", 4));
+ b = new Button("Fill");
+ b.addActionListener(this);
+ add(b);
+ b = new Button("Draw");
+ b.addActionListener(this);
+ add(b);
+ }
+
+ @Override
+ public void actionPerformed(ActionEvent ev) {
+ String label = ev.getActionCommand();
+
+ int start, extent;
+ try {
+ start = Integer.parseInt(startTF.getText().trim());
+ } catch (NumberFormatException ignored) {
+ start = 0;
+ }
+ try {
+ extent = Integer.parseInt(extentTF.getText().trim());
+ } catch (NumberFormatException ignored) {
+ extent = 0;
+ }
+
+ canvas.redraw(label.equals("Fill"), start, extent);
+ }
+}
+
+
+@SuppressWarnings("serial")
+class IntegerTextField extends TextField {
+
+ String oldText = null;
+
+ public IntegerTextField(String text, int columns) {
+ super(text, columns);
+ enableEvents(AWTEvent.KEY_EVENT_MASK | AWTEvent.TEXT_EVENT_MASK);
+ oldText = getText();
+ }
+
+ // Consume non-digit KeyTyped events
+ // Note that processTextEvent kind of eliminates the need for this
+ // function, but this is neater, since ideally, it would prevent
+ // the text from appearing at all. Sigh. See bugid 4100317/4114565.
+ //
+ @Override
+ protected void processEvent(AWTEvent evt) {
+ int id = evt.getID();
+ if (id != KeyEvent.KEY_TYPED) {
+ super.processEvent(evt);
+ return;
+ }
+
+ KeyEvent kevt = (KeyEvent) evt;
+ char c = kevt.getKeyChar();
+
+ // Digits, backspace, and delete are okay
+ // Note that the minus sign is allowed, but not the decimal
+ if (Character.isDigit(c) || (c == '\b') || (c == '\u007f') || (c
+ == '\u002d')) {
+ super.processEvent(evt);
+ return;
+ }
+
+ Toolkit.getDefaultToolkit().beep();
+ kevt.consume();
+ }
+
+ // Should consume TextEvents for non-integer Strings
+ // Store away the text in the tf for every TextEvent
+ // so we can revert to it on a TextEvent (paste, or
+ // legal key in the wrong location) with bad text
+ //
+ @Override
+ protected void processTextEvent(TextEvent te) {
+ // The empty string is okay, too
+ String newText = getText();
+ if (newText.equals("") || textIsInteger(newText)) {
+ oldText = newText;
+ super.processTextEvent(te);
+ return;
+ }
+
+ Toolkit.getDefaultToolkit().beep();
+ setText(oldText);
+ }
+
+ // Returns true for Integers (zero and negative
+ // values are allowed).
+ // Note that the empty string is not allowed.
+ //
+ private boolean textIsInteger(String textToCheck) {
+
+ try {
+ Integer.parseInt(textToCheck, 10);
+ return true;
+ } catch (NumberFormatException ignored) {
+ return false;
+ }
+ }
+}