Source Code Cross Referenced for SplashScreen.java in  » Scripting » oscript-2.10.4 » ti » chimera » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » oscript 2.10.4 » ti.chimera 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*=============================================================================
002:         *     Copyright Texas Instruments 2001, 2002. All Rights Reserved.
003:         * 
004:         *  This program is free software; you can redistribute it and/or modify
005:         *  it under the terms of the GNU General Public License as published by
006:         *  the Free Software Foundation; either version 2 of the License, or
007:         *  (at your option) any later version.
008:         * 
009:         *  This program is distributed in the hope that it will be useful,
010:         *  but WITHOUT ANY WARRANTY; without even the implied warranty of
011:         *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012:         *  GNU General Public License for more details.
013:         * 
014:         *  You should have received a copy of the GNU General Public License
015:         *  along with this program; if not, write to the Free Software
016:         *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
017:         */
018:
019:        package ti.chimera;
020:
021:        import java.awt.*;
022:
023:        /**
024:         * A splash screen is a borderless window displayed at startup.  It contains
025:         * the specified splash screen image, plus the log text at the specified 
026:         * location.
027:         * 
028:         * @author Rob Clark
029:         * @version 0.1
030:         */
031:        public class SplashScreen extends Window implements  Main.Logger {
032:            private Image img;
033:            private int imgWidth;
034:            private int imgHeight;
035:
036:            private int textX;
037:            private int textY;
038:
039:            private String logMessage = "";
040:
041:            /**
042:             * if not null, this indicates the size of the previously drawn log message,
043:             * so we know what portion of the window needs to be repainted when the
044:             * log message changes
045:             */
046:            private Rectangle logMessageRect;
047:
048:            private Font font;
049:            private FontMetrics fm;
050:
051:            private Main main;
052:
053:            /**
054:             * Create a splash screen.
055:             * 
056:             * @param url          the name of the resource containing the splash image
057:             * @param x            the x-coordinate to draw text at
058:             * @param y            the y-coordinate to draw text at
059:             */
060:            public SplashScreen(Main main, java.net.URL url, int x, int y) {
061:                super (new Frame());
062:
063:                this .main = main;
064:
065:                textX = x;
066:                textY = y;
067:
068:                Toolkit tk = Toolkit.getDefaultToolkit();
069:                img = tk.createImage(url);
070:
071:                font = new Font("SansSerif", Font.BOLD, 12);
072:
073:                // wait for the image to be fully loaded:
074:                MediaTracker mt = new MediaTracker(this );
075:                mt.addImage(img, 0);
076:                try {
077:                    mt.waitForAll();
078:                } catch (InterruptedException e) {
079:                    // ignore
080:                }
081:                imgWidth = img.getWidth(this );
082:                imgHeight = img.getHeight(this );
083:
084:                // center splash screen:
085:                Dimension d = tk.getScreenSize();
086:                setBounds((d.width - imgWidth) / 2, (d.height - imgHeight) / 2,
087:                        imgWidth, imgHeight);
088:            }
089:
090:            /**
091:             * Called to show or hide the splash screen.  While the splash screen 
092:             * is visible, it is registered with <code>main</code> to receive log
093:             * events.
094:             * 
095:             * @param visible      is the splash screen visible
096:             */
097:            public void setVisible(boolean visible) {
098:                if (visible)
099:                    main.addLogger(this );
100:                else
101:                    main.removeLogger(this );
102:                super .setVisible(visible);
103:            }
104:
105:            /**
106:             * Set the current log message that is super-imposed over the splash
107:             * image.
108:             * 
109:             * @param msg          the message
110:             */
111:            public void log(String msg) {
112:                logMessage = msg;
113:                if (logMessageRect != null)
114:                    repaint(logMessageRect.x, logMessageRect.y,
115:                            logMessageRect.width, logMessageRect.height);
116:                else
117:                    repaint();
118:            }
119:
120:            /**
121:             * Paint the splash screen.
122:             * 
123:             * @param g   the graphics context
124:             */
125:            public void paint(Graphics g) {
126:                g.drawImage(img, 0, 0, imgWidth, imgHeight, this );
127:
128:                g.setColor(Color.white);
129:                g.setFont(font);
130:
131:                if (fm == null)
132:                    fm = g.getFontMetrics(font);
133:
134:                if (logMessageRect == null) {
135:                    logMessageRect = fm.getStringBounds("", g).getBounds();
136:                    logMessageRect.x = textX;
137:                    logMessageRect.y = textY - fm.getAscent();
138:                    logMessageRect.width = imgWidth - textX;
139:                }
140:
141:                g.drawString(logMessage, textX, textY);
142:            }
143:
144:            /**
145:             * No need to ever clearRect, so override this too.
146:             */
147:            public void update(Graphics g) {
148:                paint(g);
149:            }
150:        }
151:
152:        /*
153:         *   Local Variables:
154:         *   tab-width: 2
155:         *   indent-tabs-mode: nil
156:         *   mode: java
157:         *   c-indentation-style: java
158:         *   c-basic-offset: 2
159:         *   eval: (c-set-offset 'substatement-open '0)
160:         *   eval: (c-set-offset 'case-label '+)
161:         *   eval: (c-set-offset 'inclass '+)
162:         *   eval: (c-set-offset 'inline-open '0)
163:         *   End:
164:         */
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