/**Imgage View 3.6b- image browser applet Copyright (C) 1998, 1999 Mihai Munteanu This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. You can contact me at: * http://www.obs-us.com/people/mihai * e-mail: munteanu_m@yahoo.com * Mihai Munteanu str. M.Eminescu 44 2200 Brasov, ROMANIA * fax: +40 (0)68 410330 Imgage View is a simple 4x4 java applet It was created and compiled using only the Sun JDK 1.0.2 */ import java.awt.*; import java.awt.image.*; import java.awt.image.ImageObserver; import java.net.*; import java.applet.*; import java.lang.Math; import java.io.*; import java.util.*; import mmmUtil.ReadParam; import mmmUtil.HelpWindow; public class ImgView extends Applet { static String HOMEPAGE="http://www.obs-us.com/people/mihai/"; static String VERSION="Image View 3.6b"; static String AUTHOR="Mihai Munteanu"; static String COPYRIGHT="(c) 1998, 1999"; Image photo; //The curent image int width, heigth; //the width and th heigth of the curent image Applet applet; //This applet boolean sizeknown; //True when the size of the image is known boolean errored, err; boolean tooBig, tooSmall, fitOn, oneto1On, appletToSmall; //some flags char layoutStyle; //the layout type //Graphical interface Button btnNext, btnPrev, btnFit, btn1to1, btnZoomIn, btnZoomOut, btnInfo; Panel pBtn, pSouth, pZoom, pControl, pTitle, p1Title, pEast; List photoList; Scrollbar vertScroll =new Scrollbar(Scrollbar.VERTICAL); Scrollbar horizScroll=new Scrollbar(Scrollbar.HORIZONTAL); Label labTitle; Color backCol, prevNextBtnCol, btnCol, labCol, listCol; Font fBig; Font fSmall; Font fSmallB; HelpWindow helpWindow = new HelpWindow(); String[] fileName; //array that contains the filenames of the images String[] comments; //array that oontains the comment (caption) for each image boolean[] notFound; //true if an image was not found float pwFit, phFit, pw1to1, ph1to1, phZoom, pwZoom; int px, py, ph, pw, pxFit, pyFit, px1to1, py1to1, pxZoom, pyZoom, maxZoom; int noOfPhotos = 0; // is incremented for every file name found in ImgView.toc int pointPhoto = 0; //curent image index int numberOfPhotos = 1024; // this is used to allocate memory for the fileName and comments arrays. // default for 1024 photos int picW, picH; //curent image dysplay size String about;//the about text public void init() { //set the flags sizeknown=false; tooBig=false; tooSmall=false; oneto1On=false; fitOn=true; appletToSmall=false; layoutStyle='l'; //set the about text about=setAboutText(); //and the about window helpWindow.setTitle(VERSION+" - Help"); helpWindow.setText(about); helpWindow.pack(); helpWindow.resize(500,380); helpWindow.setResizable(false); //set the fonts fBig = new Font("Helvetica", Font.BOLD, 14); fSmall=new Font("Helvetica", Font.PLAIN, 12); fSmallB=new Font("Helvetica", Font.BOLD, 12); //set the colors backCol=ReadParam.readColor(getParameter("backColor") ,Color.black); btnCol=ReadParam.readColor(getParameter("buttonsColor") ,Color.lightGray); labCol=ReadParam.readColor(getParameter("titlesColor") ,Color.yellow); listCol=ReadParam.readColor(getParameter("listBackColor") ,Color.white); prevNextBtnCol=ReadParam.readColor(getParameter("buttonsPrevNextColor") ,Color.white); if(size().width<240 || size().height<180){//checks the size of th eapplet appletToSmall=true; } //check the layout type String layoutType = ""; layoutType = layoutType + getParameter("layouttype"); if(layoutType.length()>0){ if(layoutType.charAt(0)=='c' || layoutType.charAt(0)=='C'){ layoutStyle='c'; } if(layoutType.charAt(0)=='r' || layoutType.charAt(0)=='R'){ layoutStyle='r'; } } //set the images arrays numberOfPhotos=ReadParam.readPositiveInt(getParameter("numberOfPhotos"), 1024); //default number of photos is 1024 maxZoom=ReadParam.readPositiveInt(getParameter("maxZoomIn"), 3); //default maximum zoom is 3 photoList =new List(4, false); photoList.setBackground(listCol); fileName = new String[numberOfPhotos]; comments = new String[numberOfPhotos]; notFound = new boolean[numberOfPhotos]; try{//this block will read and scan the ImgView.toc file URL tocfile = new URL(getCodeBase(), "ImgView.toc"); DataInputStream dis= new DataInputStream(tocfile.openStream()); String inputLine; boolean comment, file; while((inputLine = dis.readLine()) != null){ StringBuffer f = new StringBuffer(); StringBuffer c = new StringBuffer(); if(inputLine.length()>1){ if(inputLine.charAt(0)=='*'){ comment=false; file=true; StringBuffer buff = new StringBuffer(); for(int i=1; i' || inputLine.charAt(i)==' ' || inputLine.charAt(i)=='\t') && file==true){ file=false; } if(inputLine.charAt(i)=='>' && comment==false){ comment=true; file=false; } if(file){ f.append(inputLine.charAt(i)); } if(comment){ c.append(inputLine.charAt(i)); } } fileName[noOfPhotos]=f.toString(); notFound[noOfPhotos]=false; if (comment){ String cc = c.toString(); for(int i=1; i0)||(ff.lastIndexOf('/'))>0){ for(int i=1+Math.max(ff.lastIndexOf('/'),ff.lastIndexOf('\\')); i tag is smaller\nthan the number of photos in the configuration file!\n\n"+e); } labTitle = new Label(" Contacting host..."); if(!appletToSmall){ photo = getImage(getCodeBase(), fileName[pointPhoto]); pSouth = new Panel(); pBtn = new Panel(); pControl = new Panel(); pZoom = new Panel(); p1Title = new Panel(); pTitle = new Panel(); pEast = new Panel(); btnNext = new Button("Next"); btnNext.setBackground(prevNextBtnCol); btnPrev = new Button("Previous"); btnPrev.setBackground(prevNextBtnCol); btnFit = new Button("Fit"); btnFit.setBackground(btnCol); btn1to1 = new Button("1 : 1"); btn1to1.setBackground(btnCol); btnZoomIn = new Button("Zoom In"); btnZoomIn.setBackground(btnCol); btnZoomOut = new Button("Zoom Out"); btnZoomOut.setBackground(btnCol); btnInfo = new Button("Help"); btnInfo.setBackground(btnCol); setLayout(new BorderLayout()); pSouth.setLayout(new BorderLayout()); pZoom.setLayout(new GridLayout(1,4)); pTitle.setLayout(new BorderLayout()); p1Title.setLayout(new BorderLayout()); pTitle.add("North", horizScroll); photoList.select(0); p1Title.setBackground(labCol); p1Title.add("Center", labTitle); pTitle.add("Center", p1Title); pZoom.add(btnFit); pZoom.add(btn1to1); pZoom.add(btnZoomIn); pZoom.add(btnZoomOut); pBtn.setLayout(new GridLayout(2,1)); if(layoutStyle=='c'){ pControl.setLayout(new GridLayout(1,2)); pControl.add(btnPrev); pControl.add(btnNext); } else{ pControl.setLayout(new BorderLayout()); pControl.add("West", pBtn); pControl.add("Center", photoList); pBtn.add(btnPrev); btnPrev.disable(); pBtn.add(btnNext); } p1Title.add("East", btnInfo); pSouth.add("Center", pControl); pSouth.add("South", pZoom); pSouth.add("North", pTitle); add("South", pSouth); add("East", vertScroll); vertScroll.disable(); horizScroll.disable(); btnFit.disable(); btn1to1.disable(); btnZoomIn.disable(); btnZoomOut.disable(); validate(); picW=size().width-vertScroll.size().width; picH=vertScroll.size().height; getsize(); } else{ labTitle.setText("Applet too small!"); add("Center", labTitle); validate(); } } public boolean imageUpdate(Image theimg, int infoflags, int x, int y, int w, int h){ if((infoflags & (ERROR))!=0){ errored=true; } if(sizeknown == false){ if ((infoflags & (WIDTH | HEIGHT)) !=0) { getsize(); } } boolean done = ((infoflags & (ERROR | FRAMEBITS | ALLBITS)) != 0); repaint(done ? 0 : 200); //repaint every 200miliseconds return !done; } public synchronized void getsize(){ if(errored){ photo = getImage(getCodeBase(), "error.jpg"); repaint(); errored=false; String tmp = photoList.getItem(pointPhoto); if(notFound[pointPhoto]!=true){ photoList.replaceItem("Not found: "+tmp, pointPhoto); comments[pointPhoto]="Not found: "+tmp; notFound[pointPhoto]=true; } photoList.select(pointPhoto); } if(sizeknown==false){ //here is the brain of th eapplet //this block calculates the size of the image pw1to1 = photo.getWidth(this); ph1to1 = photo.getHeight(this); pwFit=pw1to1; phFit=ph1to1; if( phFit<0 || pwFit<0){ return; } sizeknown=true; if((phFit>(picH-4))||(pwFit>(picW-4))){ //the image is larger than the applet, must resize the image if( (phFit/pwFit) < (((float)picH-4)/((float)picW-4))){ phFit=phFit/pwFit; pwFit=picW-4; phFit=phFit*pwFit; pxFit=2; pyFit=((picH-4)-Math.round(phFit))/2; } else{ pwFit=pwFit/phFit; phFit=picH-4; pwFit=phFit*pwFit; pyFit=2; pxFit=((picW-4)-Math.round(pwFit))/2; } } else{ //the image is smaller than the applet pyFit=(picH-Math.round(phFit))/2; pxFit=(picW-Math.round(pwFit))/2; } px=pxFit; py=pyFit; pw=Math.round(pwFit); ph=Math.round(phFit); py1to1=(picH-Math.round(ph1to1))/2; px1to1=(picW-Math.round(pw1to1))/2; } } public synchronized void paint(Graphics g){ btnFit.disable(); btn1to1.disable(); btnZoomIn.disable(); btnZoomOut.disable(); g.setColor(backCol); g.fillRect(0,0,picW,picH); update(g); } public synchronized void update(Graphics g) { getsize(); if(pwpw1to1*maxZoom && ph>ph1to1*maxZoom ){ tooBig=true; } else{ tooBig=false; } if(sizeknown){ if(!fitOn) btnFit.enable(); if(!oneto1On) btn1to1.enable(); if(!tooSmall) {btnZoomOut.enable();} if(!tooBig) {btnZoomIn.enable();} labTitle.setText(" "+comments[pointPhoto]); g.drawImage(photo, px, py, pw, ph, this); } } public boolean action(Event e, Object arg){ Object target = e.target; if((target == this.btnNext)&&(pointPhoto<(noOfPhotos-1))){ pointPhoto++; photo = getImage(getCodeBase(), fileName[pointPhoto]); photoList.select(pointPhoto); checkPoint(); return true; } if((target == this.btnPrev)&&(pointPhoto>0)){ pointPhoto--; photo = getImage(getCodeBase(), fileName[pointPhoto]); photoList.select(pointPhoto); checkPoint(); return true; } if(e.target == photoList){ pointPhoto=photoList.getSelectedIndex(); photo = getImage(getCodeBase(), fileName[pointPhoto]); checkPoint(); return true; } if(e.target == this.btnInfo){ helpWindow.show(); return true; } if(target == this.btn1to1){ oneto1On=true; fitOn=false; px=px1to1; py=py1to1; pw=Math.round(pw1to1); ph=Math.round(ph1to1); setScroll(px, py, pw, ph, picW, picH); paint(getGraphics()); return true; } if(target == this.btnFit){ oneto1On=false; fitOn=true; px=pxFit; py=pyFit; pw=Math.round(pwFit); ph=Math.round(phFit); setScroll(px, py, pw, ph, picW, picH); paint(getGraphics()); return true; } if(target == this.btnZoomIn && !tooBig){ btnZoomIn.disable(); px=(int)(1.5*px-picW/4); py=(int)(1.5*py-picH/4); pw=(int)(pw*1.5); ph=(int)(ph*1.5); setScroll(px, py, pw, ph, picW, picH); oneto1On=false; fitOn=false; paint(getGraphics()); return true; } if(target == this.btnZoomOut && !tooSmall){ btnZoomOut.disable(); px=(int)(px/1.5+picW/6); py=(int)(py/1.5+picH/6); pw=(int)(pw/1.5); ph=(int)(ph/1.5); if(px>0){ if(pwpicW){ px=picW-pw; } else{ px=(picW-pw)/2; } } if(py>0){ if(phpicH){ py=picH-ph; } else{ py=(picH-ph)/2; } } setScroll(px, py, pw, ph, picW, picH); oneto1On=false; fitOn=false; paint(getGraphics()); return true; } return false; } public boolean handleEvent(Event evt){ switch(evt.id){ case Event.SCROLL_LINE_UP: case Event.SCROLL_LINE_DOWN: case Event.SCROLL_PAGE_UP: case Event.SCROLL_PAGE_DOWN: case Event.SCROLL_ABSOLUTE: if(evt.target == horizScroll){ px=-((Integer)evt.arg).intValue(); if(px>=0){ px=0; } if(px<=picW-pw){ px=picW-pw; } repaint(0,0,picW,picH); } if(evt.target == vertScroll){ py=-((Integer)evt.arg).intValue(); if(py>=0){ py=0; } if(py<=picH-ph){ py=picH-ph; } repaint(0,0,picW,picH); } } return super.handleEvent(evt); } private void setScroll(int x, int y, int w, int h, int pW, int pH){ horizScroll.disable(); vertScroll.disable(); if( (x<0) || ((x+w)>picW)){ horizScroll.setValues(-x, 1, 0, w-pW); horizScroll.setPageIncrement(16); horizScroll.setLineIncrement(4); horizScroll.enable(); } if( (y<0) || ((y+h)>picH)){ vertScroll.setValues(-y, 1, 0, h-pH); vertScroll.setPageIncrement(16); vertScroll.setLineIncrement(4); vertScroll.enable(); } } private void checkPoint(){ //Check what buttons should be enabled or desabled labTitle.setText(" Contacting host..."); if(pointPhoto<=(noOfPhotos-2)){ btnNext.enable(); } else{ btnNext.disable(); } if(pointPhoto>=1){ btnPrev.enable(); } else{ btnPrev.disable(); } sizeknown=false; btnFit.disable(); btn1to1.disable(); btnZoomIn.disable(); btnZoomOut.disable(); horizScroll.disable(); vertScroll.disable(); tooBig=false; tooSmall=false; oneto1On=false; fitOn=true; paint(getGraphics()); } private String setAboutText(){ String copyright=VERSION+" - image browser applet\n"+COPYRIGHT+" "+AUTHOR+"\n\nThis program is free software; you can redistribute it and/or modify\nit under the terms of the GNU General Public License as published by\nthe Free Software Foundation; either version 2 of the License, or\n(at your option) any later version.\n\nThis program is distributed in the hope that it will be useful,\nbut WITHOUT ANY WARRANTY; without even the implied warranty of\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\nGNU General Public License for more details.\n\nYou should have received a copy of the GNU General Public License\nalong with this program; if not, write to the Free Software\nFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n\nYou can contact me at:\n\n* http://www.obs-us.com/people/mihai\n* e-mail: munteanu_m@yahoo.com or "; String help=VERSION+" - Help\n\nBrowsing Controls:\n\n* Previous - Loads and displays the previous picture\n* Next - Loads and displays the next picture\n* Picture List - Double click on the chosen title to load and display the picture\n\nNOTE:\nThe picture list is not displayed in the compact version of the layout\n\nZoom Controls:\n\n* Fit - Fits the picture in the display area\n* 1 : 1 - Displays the picture at its original size\n* Zoom In - Magnifies the picture size 1.5 times\n* Zoom In - Reduces the picture size 1.5 times\n\nNOTES:\n* If the image is smaller than the display area '1 : 1' and 'Fit' produce the same result.\n* The number of zooming steps is limited.\n\n\n"; return help+copyright; } public String getAppletInfo() { return VERSION+" "+COPYRIGHT+" "+AUTHOR+" - "; } }