Java Drawing Board

Java Drawing Board

Import Java.awt.basicstroke;import java.awt.borderlayout;import Java.awt.button;import Java.awt.Color;import Java.awt.cursor;import Java.awt.dimension;import Java.awt.frame;import Java.awt.graphics;import Java.awt.graphics2d;import Java.awt.gridlayout;import Java.awt.label;import Java.awt.panel;import Java.awt.renderinghints;import Java.awt.toolkit;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.awt.event.mouseadapter;import Java.awt.event.mouseevent;import Java.awt.event.mouselistener;import Java.awt.event.mousemotionlistener;import Java.awt.event.WindowAdapter; Import Java.awt.event.windowevent;import java.awt.image.bufferedimage;/** * Simple drawing board Program * * @author He Qingsong * @version 1.0 */PUBL IC class UI extends Frame {//artboard private Palette Palette = null;//Display the current color panel private panel noncecolor = null;//Brush thickness Private  Label drawwidth = null;//painting nib point of decoration private Label drawcap = null;//Pick Color button listener event class private buttoncoloraction buttoncoloraction = null;//the cursor-style listener event class after the mouse enters the button privAte buttoncursor buttoncursor = null;//Brush-style listener Event private Buttonstrokeaction buttonstrokeaction = null;/** * Construction method * */PUBL IC UI () {//Set title bar text Super ("Drawing pad");//Construct a drawing board Palette = new Palette (); panel pane = new Panel (new GridLayout (2, 1));//Brush color selector Panel panecolor = new Panel (new GridLayout (1, 13));//12 color selection Buttons but ton [] Buttoncolor = new BUTTON[12]; color [] color = {Color.Black, Color.Blue, Color.cyan, Color.darkgray, Color.gray, Color.green, Color.magenta, Color.oran GE, Color.pink, color.red, Color.White, color.yellow};//displays the current color of the panel noncecolor = new Panel (); Noncecolor.setbackground ( Color.Black);p Anecolor.add (noncecolor); buttoncoloraction = new Buttoncoloraction (); buttoncursor = new ButtonCursor () ; for (int i = 0; i < buttoncolor.length; i++) {Buttoncolor[i] = new Button (); Buttoncolor[i].setbackground (Color[i]); Buttoncolor[i].addactionlistener (buttoncoloraction); Buttoncolor[i].addmouselistener (buttonCursor); Panecolor.add (Buttoncolor[i]);} Pane.add (Panecolor);//Brush Color selector panel Panestroke = new PaNel (new GridLayout (1, 13));//control brush Style buttonstrokeaction = new Buttonstrokeaction (); button [] Buttonstroke = new Button[11];buttonstroke[0] = New button ("1"); buttonstroke[1] = New Button ("3"); buttonstroke[ 2] = New button ("5"); buttonstroke[3] = New button ("7"); buttonstroke[4] = New button ("9"); buttonstroke[5] = New button ("11" BUTTONSTROKE[6] = New button (""), buttonstroke[7] = New button ("" "), buttonstroke[8] = new button (" n "); Buttonstroke  [9] = new button (""); buttonstroke[10] = New button ("");d Rawwidth = new Label ("3", label.center);d rawcap = new Label ("", Label.center);d rawwidth.setbackground (Color.lightgray);d rawcap.setbackground (Color.lightgray);p Anestroke.add ( DrawWidth); for (int i = 0; i < buttonstroke.length; i++) {Panestroke.add (buttonstroke[i]); Buttonstroke[i]. Addmouselistener (buttoncursor); Buttonstroke[i].addactionlistener (buttonstrokeaction); if (I <= 8) {buttonStroke[ I].setname ("width");} Else{buttonstroke[i].setname ("cap");} if (i = = 8) {panestroke.add (DRAWCAP);}} Pane.add (PAnestroke);//Add the brush color selector to the form This.add (pane, Borderlayout.north);//Add the drawing board to the form This.add (palette);//join? Form Listener, Exit program This.addwindowlistener When the Close button is clicked (New Windowadapter () {public void windowclosing (WindowEvent e) {system.exit (0);}); /Set the form icon This.seticonimage (Toolkit.getdefaulttoolkit (). CreateImage ("Images/palette.png"));// Sets the size of the form this.setsize (new Dimension (400, 430));//sets the form position in the center of the screen This.setlocationrelativeto (null);// Show Form this.setvisible (true);} /** * Program Entry * * @param args * string array parameters */public static void Main (string[] args) {new UI ()} /** * Select the Listener event class for the color button * @author He qingsong * */class Buttoncoloraction implements ActionListener {public void actionperformed (Action Event e) {Color color_temp = ((Button) E.getsource ()). Getbackground (); Noncecolor.setbackground (color_temp); Palette.setcolor (color_temp);}} /** * Mouse Enter button transform cursor style listener event class * @author He qingsong * */class Buttoncursor extends Mouseadapter {public void mouseentered (MouseEvent e) {(Button) E.getsource ()). SetCursor (New Cursor (cursor.hand_cursor)); PubLIC void mouseexited (MouseEvent e) {(Button) E.getsource ()). SetCursor (New Cursor (Cursor.default_cursor));}} /** * Set the Listener event class for the brush * @author He Qingsong * */class Buttonstrokeaction implements ActionListener {public void actionperformed (Actione Vent e) {button button_temp = (button) E.getsource (); String name = Button_temp.getname (), if (Name.equalsignorecase ("width")) {Drawwidth.settext (Button_temp.getlabel ()); Palette.setstroke (Float.parsefloat (Button_temp.getlabel ()));} else if (name.equalsignorecase ("cap")) {Drawcap.settext (Button_temp.getlabel ())), if (Button_temp.getlabel (). Equals ( "")) {Palette.setstroke (basicstroke.cap_square);} else if (Button_temp.getlabel (). Equals ("")) {Palette.setstroke (basicstroke.cap_round);}}}} /** * Artboard Class * * @author He qingsong * */class Palette extends Panel implements MouseListener, Mousemotionlistener {//mouse X coordinate position PR ivate int mousex = 0;//last X coordinate position private int oldmousex = 0;//mouse y coordinate position private int mousey = 0;//last Y coordinate position private int o Ldmousey = 0;//drawing color Private color color = null;//Brush style private Basicstroke stroke = null;//Cached graphics private BufferedImage image = null;/** * Constructs an artboard class * */public Palette () {this. Addmouselistener (this); This.addmousemotionlistener (this);//default black brush color = new Color (0, 0, 0);//set default brush style stroke = new Basicstroke (3.0f, Basicstroke.cap_round, basicstroke.join_round);//Create an RGB cache image of 1280 * 1024 image = new BufferedImage (128 0, 1024x768, BUFFEREDIMAGE.TYPE_INT_RGB);//Set the color Image.getgraphics (). SetColor (Color.White);//Draw Background image.getgraphics (). FillRect (0, 0, 1280, 1024);} /** * Override Paint Drawing method */public void Paint (Graphics g) {super.paint (g);//convert to graphics2dgraphics2d g2d = (graphics2d) g;//get Cached graphics Graphics2dgraphics2d bg = image.creategraphics ();//Graphics anti-aliasing bg.setrenderinghint (renderinghints.key_antialiasing, RENDERINGHINTS.VALUE_ANTIALIAS_ON);//Set drawing color bg.setcolor (color);//Set Brush style bg.setstroke (stroke);//Draw line, From the previous point to the new Point Bg.drawline (Oldmousex, Oldmousey, MouseX, mousey);//Draw the cached graphic onto the artboard g2d.drawimage (image, 0, 0, this);} /** * Overriding the Update method */public void Update (Graphics g) {thIs.paint (g);} /** * @return Stroke */public Basicstroke Getstroke () {return stroke;} /** * @param stroke to set the stroke */public void Setstroke (Basicstroke stroke) {this.stroke = stroke;}  /** * Set Brush weight * @param width */public void setstroke (float width) {this.stroke = new Basicstroke (width, stroke.getendcap (), Stroke.getlinejoin ());} /** * Set the decoration of the nib point of the painting * @param cap Reference Java.awt.BasicStroke class static field */public void Setstroke (int cap) {This.stroke = new Basicstroke (Stroke.getlinewidth (), Cap, Stroke.getlinejoin ());} /** * @return Color */public color GetColor () {return color;} /** * @param color to set the color */public void setcolor (color color) {This.color = color;} public void mouseclicked (MouseEvent MouseEvent) {}/** * mouse pressed */public void mousepressed (MouseEvent MouseEvent) {THIS.OLDM Ousex = This.mousex = Mouseevent.getx (); This.oldmousey = This.mousey = Mouseevent.gety (); repaint ();} public void mousereleased (MouseEvent MouseEvent) {}/** * mouse enters chessboard */public void mouseentered (MouseEvent MouseEvent) {THIS.S Etcursor(New Cursor (Cursor.crosshair_cursor));} /** * Mouse exit checkerboard */public void mouseexited (MouseEvent MouseEvent) {this.setcursor (new Cursor (Cursor.default_cursor));} /** * Mouse drag */public void mousedragged (MouseEvent MouseEvent) {this.oldmousex = This.mousex;this.oldmousey = This.mousey;t His.mousex = Mouseevent.getx (); This.mousey = Mouseevent.gety (); repaint ();} public void mousemoved (MouseEvent MouseEvent) {}}}

Java drawing Board