问题描述
CustomItemDemo.javapackageexample.customitem;importjavax.microedition.midlet.*;importjavax.microedition.lcdui.*;publicclassCustomItemDemoextendsMIDletimplementsjavax.microedition.lcdui.CommandListener{/**CreatesanewinstanceofCustomItemDemo*/publicCustomItemDemo(){}privatejavax.microedition.lcdui.FormmainForm;privateexample.customitem.TablecustomItem1;privatejavax.microedition.lcdui.CommandexitCommand;/**ThismethodinitializesUIoftheapplication.*/privatevoidinitialize(){getDisplay().setCurrent(get_mainForm());}/***Thismethodshouldreturnaninstanceofthedisplay.*/publicjavax.microedition.lcdui.DisplaygetDisplay(){returnjavax.microedition.lcdui.Display.getDisplay(this);}/***Thismethodshouldexitthemidlet.*/publicvoidexitMIDlet(){getDisplay().setCurrent(null);destroyApp(true);notifyDestroyed();}/**Calledbythesystemtoindicatethatacommandhasbeeninvokedonaparticulardisplayable.*@paramcommandtheCommandthatwsinvoked*@paramdisplayabletheDisplayableonwhichthecommandwasinvoked*/publicvoidcommandAction(javax.microedition.lcdui.Commandcommand,javax.microedition.lcdui.Displayabledisplayable){//Insertglobalpre-actioncodehereif(displayable==mainForm){if(command==exitCommand){//Insertpre-actioncodehereexitMIDlet();//Insertpost-actioncodehere}}//Insertglobalpost-actioncodehere}/**ThismethodreturnsinstanceformainFormcomponentandshouldbecalledinsteadofaccessingmainFormfielddirectly.*@returnInstanceformainFormcomponent*/publicjavax.microedition.lcdui.Formget_mainForm(){if(mainForm==null){//Insertpre-initcodeheremainForm=newjavax.microedition.lcdui.Form("CustomItemDemo",newjavax.microedition.lcdui.Item[]{get_customItem1(),});mainForm.addCommand(get_exitCommand());mainForm.setCommandListener(this);//Insertpost-initcodehere}returnmainForm;}/**ThismethodreturnsinstanceforcustomItem1componentandshouldbecalledinsteadofaccessingcustomItem1fielddirectly.*@returnInstanceforcustomItem1component*/publicexample.customitem.Tableget_customItem1(){if(customItem1==null){//Insertpre-initcodeherecustomItem1=newexample.customitem.Table("Table",Display.getDisplay(this));customItem1.setLabel("Table");//Insertpost-initcodehere}returncustomItem1;}/**ThismethodreturnsinstanceforexitCommandcomponentandshouldbecalledinsteadofaccessingexitCommandfielddirectly.*@returnInstanceforexitCommandcomponent*/publicjavax.microedition.lcdui.Commandget_exitCommand(){if(exitCommand==null){//Insertpre-initcodehereexitCommand=newjavax.microedition.lcdui.Command("Exit",javax.microedition.lcdui.Command.EXIT,1);//Insertpost-initcodehere}returnexitCommand;}/**ThismethodreturnsinstancefortextField1componentandshouldbecalledinsteadofaccessingtextField1fielddirectly.*@returnInstancefortextField1component*/publicvoidstartApp(){initialize();}publicvoidpauseApp(){}publicvoiddestroyApp(booleanunconditional){}}Table.javapublicclassTableextendsCustomItemimplementsItemCommandListener{privatefinalstaticCommandCMD_EDIT=newCommand("Edit",Command.ITEM,1);privateDisplaydisplay;privateintrows=11;//例程默认5，现在我改到11后大于屏幕privateintcols=9;//例程默认3，现在我改到9后大于屏幕privateintdx=50;privateintdy=20;privatefinalstaticintUPPER=0;privatefinalstaticintIN=1;privatefinalstaticintLOWER=2;privateintlocation=UPPER;privateintcurrentX=0;privateintcurrentY=0;privateString[][]data=newString[rows][cols];publicTable(Stringtitle,Displayd){super(title);display=d;setDefaultCommand(CMD_EDIT);setItemCommandListener(this);}protectedintgetMinContentHeight(){return(rows*dy)+1;}protectedintgetMinContentWidth(){return(cols*dx)+1;}protectedintgetPrefContentHeight(intwidth){return(rows*dy)+1;}protectedintgetPrefContentWidth(intheight){return(cols*dx)+1;}protectedvoidpaint(Graphicsg,intw,inth){for(inti=0;i<=rows;i++){g.drawLine(0,i*dy,cols*dx,i*dy);}for(inti=0;i<=cols;i++){g.drawLine(i*dx,0,i*dx,rows*dy);}intoldColor=g.getColor();g.setColor(0x00D0D0D0);g.fillRect((currentX*dx)+1,(currentY*dy)+1,dx-1,dy-1);g.setColor(oldColor);for(inti=0;i<rows;i++){for(intj=0;j<cols;j++){if(data[i][j]!=null){//storeclippingpropertiesintoldClipX=g.getClipX();intoldClipY=g.getClipY();intoldClipWidth=g.getClipWidth();intoldClipHeight=g.getClipHeight();g.setClip((j*dx)+1,i*dy,dx-1,dy-1);g.drawString(data[i][j],(j*dx)+2,((i+1)*dy)-2,Graphics.BOTTOM|Graphics.LEFT);//restoreclippingpropertiesg.setClip(oldClipX,oldClipY,oldClipWidth,oldClipHeight);}}}}protectedbooleantraverse(intdir,intviewportWidth,intviewportHeight,int[]visRect_inout){switch(dir){caseCanvas.DOWN:if(location==UPPER){location=IN;}else{if(currentY<(rows-1)){currentY++;repaint(currentX*dx,(currentY-1)*dy,dx,dy);repaint(currentX*dx,currentY*dy,dx,dy);}else{location=LOWER;returnfalse;}}break;caseCanvas.UP:if(location==LOWER){location=IN;}else{if(currentY>0){currentY--;repaint(currentX*dx,(currentY+1)*dy,dx,dy);repaint(currentX*dx,currentY*dy,dx,dy);}else{location=UPPER;returnfalse;}}break;caseCanvas.LEFT:if(currentX>0){currentX--;repaint((currentX+1)*dx,currentY*dy,dx,dy);repaint(currentX*dx,currentY*dy,dx,dy);}break;caseCanvas.RIGHT:if(currentX<(cols-1)){currentX++;repaint((currentX-1)*dx,currentY*dy,dx,dy);repaint(currentX*dx,currentY*dy,dx,dy);}}visRect_inout[0]=currentX;visRect_inout[1]=currentY;visRect_inout[2]=dx;visRect_inout[3]=dy;returntrue;}publicvoidsetText(Stringtext){data[currentY][currentX]=text;repaint(currentY*dx,currentX*dy,dx,dy);}publicvoidcommandAction(Commandc,Itemi){if(c==CMD_EDIT){TextInputtextInput=newTextInput(data[currentY][currentX],this,display);display.setCurrent(textInput);}}}
解决方案
解决方案二：
TextInput.javapackageexample.customitem;importjavax.microedition.lcdui.*;/****@version2.0*/publicclassTextInputextendsTextBoximplementsCommandListener{privatefinalstaticCommandCMD_OK=newCommand("OK",Command.OK,1);privatefinalstaticCommandCMD_CANCEL=newCommand("Cancel",Command.CANCEL,1);privateTableparent;privateDisplaydisplay;publicTextInput(Stringtext,Tableparent,Displaydisplay){super("EnterText",text,50,TextField.ANY);this.parent=parent;this.display=display;addCommand(CMD_OK);addCommand(CMD_CANCEL);setCommandListener(this);}publicvoidcommandAction(Commandc,Displayabled){if(c==CMD_OK){//updatethetable'scellandreturnparent.setText(getString());display.setCurrentItem(parent);}elseif(c==CMD_CANCEL){//returnwithoutupdatingthetable'scelldisplay.setCurrentItem(parent);}}}
解决方案三：
刚学习咯咯
解决方案四：
眼看花了~~~~
解决方案五：
现在的问题是，如果是默认大小5行3列小于屏幕显示大小，使用上下左右键可以到当前表格，但是如果把表格修改为11行9列大于屏幕显示的时候，上下左右键就不能显示屏幕以外的表格内容。怎么修改程序，才能让上下左右键显示屏幕以外的表格内容呢？
解决方案六：
我也遇到这个问题，楼主解决了么？
解决方案七：
可以添加一个滚动条，当一页显示不下的时候，大多数都是如此处理