SWT屏幕截屏（类似于QQ截屏） SWT 截屏 QQ

 先来看看代码：

import java.io.FileInputStream;import java.io.IOException;import org.eclipse.swt.SWT;import org.eclipse.swt.dnd.Clipboard;import org.eclipse.swt.dnd.DragSourceEvent;import org.eclipse.swt.dnd.DragSourceListener;import org.eclipse.swt.dnd.DropTargetEvent;import org.eclipse.swt.dnd.DropTargetListener;import org.eclipse.swt.dnd.ImageTransfer;import org.eclipse.swt.dnd.Transfer;import org.eclipse.swt.events.MouseEvent;import org.eclipse.swt.events.MouseListener;import org.eclipse.swt.events.MouseMoveListener;import org.eclipse.swt.events.PaintEvent;import org.eclipse.swt.events.PaintListener;import org.eclipse.swt.graphics.Cursor;import org.eclipse.swt.graphics.GC;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.graphics.ImageData;import org.eclipse.swt.graphics.ImageLoader;import org.eclipse.swt.graphics.Point;import org.eclipse.swt.graphics.Rectangle;import org.eclipse.swt.widgets.Canvas;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.FileDialog;import org.eclipse.swt.widgets.MessageBox;import org.eclipse.swt.widgets.Shell;public class TempShell extends Canvas implements MouseMoveListener,MouseListener,PaintListener,DragSourceListener,DropTargetListener {private Image bi;private Image get;private int width,height; private int startX,startY,endX,endY,tempX,tempY; private Rectangle select=new Rectangle(0,0,0,0);//表示选中的区域 private Cursor cs;//表示一般情况下的鼠标状态 private States current=States.DEFAULT;// 表示当前的编辑状态 private Rectangle[] rec;//表示八个编辑点的区域 //下面四个常量,分别表示谁是被选中的那条线上的端点 public static final int START_X=1; public static final int START_Y=2; public static final int END_X=3; public static final int END_Y=4; private int currentX,currentY;//当前被选中的X和Y,只有这两个需要改变 private Point p=new Point(0,0);//当前鼠标移的地点 private boolean showTip=true;//是否显示提示.如果鼠标左键一按,则提示不再显了 private Rectangle rect=new Rectangle(0,0,0,0); private Image bagground; private Rectangle saveRect=new Rectangle(0,0,0,0); private Rectangle cleanRect=new Rectangle(0,0,0,0); private Rectangle copyRect=new Rectangle(0,0,0,0); private boolean saveOk=false; private boolean cleanOk=false; private boolean copyOk=false; private Image saveImage; private Image cleanImage; private Image copyImage; private Image saveImages; private Image cleanImages; private Image copyImages; private Image newSaveImages; private Image newCleanImages; private Image newCopyImages; private Composite composite; private int mouseState=10;//鼠标状态 private Clipboard clipboard;; public TempShell(Composite composite,Image bi){ super(composite,SWT.NO_BACKGROUND | SWT.DOUBLE_BUFFERED); this.composite=composite; this.bi=bi; this.cs=getDisplay().getSystemCursor(SWT.CURSOR_HAND); clipboard = new Clipboard(getDisplay()); try { FileInputStream imageIo=new FileInputStream("image/icon/backImage.gif"); bagground=new Image(getDisplay(),imageIo); imageIo=new FileInputStream("image/icon/sucssefull.gif"); copyImages=copyImage=new Image(getDisplay(),imageIo); imageIo=new FileInputStream("image/icon/Revocation.gif"); cleanImages=cleanImage=new Image(getDisplay(),imageIo); imageIo=new FileInputStream("image/icon/save.gif"); saveImages=saveImage=new Image(getDisplay(),imageIo); imageIo=new FileInputStream("image/icon/saves.gif"); newSaveImages=new Image(getDisplay(),imageIo); imageIo=new FileInputStream("image/icon/Revocations.gif"); newCleanImages=new Image(getDisplay(),imageIo); imageIo=new FileInputStream("image/icon/sucssefulls.gif"); newCopyImages=new Image(getDisplay(),imageIo); } catch (IOException e) { e.printStackTrace(); } this.addMouseListener(this); this.addMouseMoveListener(this); this.addPaintListener(this); /*DragSource ds=new DragSource(this,DND.DROP_MOVE); ds.addDragListener(this); DropTarget dt=new DropTarget(this,DND.DROP_MOVE); dt.addDropListener(this);*/ initRecs(); } private void initRecs(){ rec=new Rectangle[8]; for(int i=0;i<rec.length;i++){ rec[i]=new Rectangle(0,0,0,0); } } // 根据东南西北等八个方向决定选中的要修改的X和Y的座标 private void initSelect(States state){ switch(state){ case DEFAULT: currentX=0; currentY=0; break; case EAST: System.out.println("EAST endX="+endX+" startX="+startX+" START_X="+START_X+" END_X="+END_X); currentX=(endX>startX?END_X:START_X); currentY=0; break; case WEST: System.out.println("WEST endX="+endX+" startX="+startX+" START_X="+START_X+" END_X="+END_X); currentX=(endX>startX?START_X:END_X); currentY=0; break; case NORTH: System.out.println("NORTH"); currentX=0; currentY=(startY>endY?END_Y:START_Y); break; case SOUTH: System.out.println("SOUTH"); currentX=0; currentY=(startY>endY?START_Y:END_Y); break; case NORTH_EAST: System.out.println("EAST"); currentY=(startY>endY?END_Y:START_Y); currentX=(endX>startX?END_X:START_X); break; case NORTH_WEST: System.out.println("NORTH_WEST"); currentY=(startY>endY?END_Y:START_Y); currentX=(endX>startX?START_X:END_X); break; case SOUTH_EAST: System.out.println("SOUTH_EAST"); currentY=(startY>endY?START_Y:END_Y); currentX=(endX>startX?END_X:START_X); break; case SOUTH_WEST: System.out.println("SOUTH_WEST"); currentY=(startY>endY?START_Y:END_Y); currentX=(endX>startX?START_X:END_X); break; default: currentX=0; currentY=0; break; } }public void mouseMove(MouseEvent me) {doMouseMoved(me);switch(mouseState){case 1:current=States.WEST;break;case 2:current=States.EAST;break;case 3:current=States.SOUTH;break;case 4:current=States.NORTH;break;case 5:current=States.NORTH_EAST;break;case 6:current=States.SOUTH_EAST;break;case 7:current=States.NORTH_WEST;break;case 8:current=States.SOUTH_WEST;break;} initSelect(current); int x=me.x; int y=me.y; //Move(me.x, me.y); switch(mouseState){ case 0: if(current==States.MOVE){ startX+=(x-tempX); startY+=(y-tempY); endX+=(x-tempX); endY+=(y-tempY); tempX=x; tempY=y; } break; case 1: if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } break; case 2: if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } break; case 3: if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } break; case 4: System.out.println("currentY="+currentY+" START_Y="+START_Y); if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } break; case 5: if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } break; case 6: if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } break; case 7: if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } break; case 8: if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } break; case 9: startX=tempX; startY=tempY; endX=x; endY=y; break; case 10: break; } this.redraw(); //if(mouseState==0){//Move(me.x, me.y);//this.setRedraw(true);//} /*if(showTip){ p=new Point(me.x,me.y); this.redraw(); }*/}//特意定义一个方法处理鼠标移动,是为了每次都能初始化一下所要选择的地区 private void doMouseMoved(MouseEvent me){ Point px=new Point(me.x,me.y); if(select.contains(px)){ this.setCursor(getDisplay().getSystemCursor(SWT.CURSOR_HAND)); current=States.MOVE; }else if(saveRect.contains(px)){ this.setCursor(getDisplay().getSystemCursor(SWT.CURSOR_HAND)); saveImage=newSaveImages; saveOk=true; copyOk=false; cleanOk=false; mouseState=10; }else if(cleanRect.contains(px)){ this.setCursor(getDisplay().getSystemCursor(SWT.CURSOR_HAND)); cleanImage=newCleanImages; cleanOk=true; saveOk=false; copyOk=false; mouseState=10; }else if(copyRect.contains(px)){ this.setCursor(getDisplay().getSystemCursor(SWT.CURSOR_HAND)); copyImage=newCopyImages; copyOk=true; cleanOk=false; saveOk=false; mouseState=10; } else{ saveOk=false; copyOk=false; cleanOk=false; copyImage=copyImages; cleanImage=cleanImages; saveImage=saveImages; States[] st=States.values(); for(int i=0;i<rec.length;i++){ if(rec[i].contains(px)){ current=st[i]; this.setCursor(st[i].getCursor()); return; } } this.setCursor(cs); current=States.DEFAULT; } this.redraw(); } public void getImageScreen(int x,int y,int w,int h) {GC gc = new GC(bi);int actW = Math.min(w, bi.getBounds().width - x);int actH = Math.min(h, bi.getBounds().height - y);get = new Image(getShell().getDisplay(), actW, actH);gc.copyArea(get, x, y);gc.dispose();}public void mouseDoubleClick(MouseEvent me) { //Rectangle rec=new Rectangle(startX,startY,Math.abs(endX-startX),Math.abs(endY-startY)); Point p=new Point(me.x,me.y); if(select.contains(p)){ if(select.x+select.width<bi.getBounds().width&&select.y+select.height<bi.getBounds().height){ this.getImageScreen(select.x,select.y,select.width,select.height); composite.setVisible(false); //updates(); }else{ int wid=select.width,het=select.height; if(select.x+select.width>=bi.getBounds().width){ wid=bi.getBounds().width-select.x; } if(select.y+select.height>=bi.getBounds().height){ het=bi.getBounds().height-select.y; } this.getImageScreen(select.x,select.y,wid,het); composite.setVisible(false); //updates(); } } doCopy(get);}/** *公共的处理把当前的图片加入剪帖板的方法 */ public void doCopy(final Image get){ try{ if(get==null){ openMessageBox(this.getShell(),"错误","图片不能为空!!"); return; } ImageTransfer imageTransfer = ImageTransfer.getInstance(); clipboard.setContents(new Object[] { get.getImageData() }, new Transfer[] { imageTransfer }); openMessageBox(this.getShell(),"错误","已复制到系统粘帖板!!"); }catch(Exception exe){ exe.printStackTrace(); openMessageBox(this.getShell(),"错误","复制到系统粘帖板出错!!"); } //composite.dispose(); } /** *公用的处理保存图片的方法 *这个方法不再私有了 */ public void doSave(Image get){ try{ if(get==null){ openMessageBox(this.getShell(),"错误","图片不能为空!!"); return; } FileDialog fd=new FileDialog(this.getShell(),SWT.SAVE); fd.setText("保存图片"); String[] filterExt={"*.jpeg"}; fd.setFilterExtensions(filterExt); String savePath=fd.open(); if(savePath!=null){ ImageLoader loader=new ImageLoader(); loader.data = new ImageData[] {get.getImageData()}; loader.save(savePath, SWT.IMAGE_JPEG); } } catch(Exception exe){ exe.printStackTrace(); } composite.dispose(); }public void mouseDown(MouseEvent me) { //showTip=false; mouseState=9; for(int i=0;i<rec.length;i++){ if(rec[i].contains(me.x,me.y)){ System.out.println(i); switch(i){ case 0: mouseState=7; break; case 1: mouseState=4; break; case 2: mouseState=5; break; case 3: mouseState=2; break; case 4: mouseState=6; break; case 5: mouseState=3; break; case 6: mouseState=8; break; case 7: mouseState=1; break; } } } if(select.contains(me.x,me.y)){ mouseState=0; } tempX=me.x; tempY=me.y;}public void mouseUp(MouseEvent me) {mouseState=10;if(me.button==3){ if(current==States.MOVE){ //showTip=true; p=new Point(me.x,me.y); startX=0; startY=0; endX=0; endY=0; this.redraw(); } else{ composite.setVisible(false); composite.dispose(); //updates(); } } if (saveOk) {if (select.x + select.width < bi.getBounds().width&& select.y + select.height < bi.getBounds().height) {this.getImageScreen(select.x, select.y, select.width,select.height);composite.setVisible(false);// updates();} else {int wid = select.width, het = select.height;if (select.x + select.width >= bi.getBounds().width) {wid = bi.getBounds().width - select.x;}if (select.y + select.height >= bi.getBounds().height) {het = bi.getBounds().height - select.y;}this.getImageScreen(select.x, select.y, wid, het);composite.setVisible(false);// updates();}doSave(get);} if(copyOk){ try {if (select.x + select.width < bi.getBounds().width&& select.y + select.height < bi.getBounds().height) {this.getImageScreen(select.x, select.y, select.width,select.height);composite.setVisible(false);// updates();} else {int wid = select.width, het = select.height;if (select.x + select.width >= bi.getBounds().width) {wid = bi.getBounds().height - select.x;}if (select.y + select.height >= bi.getBounds().height) {het = bi.getBounds().height - select.y;}this.getImageScreen(select.x, select.y, wid, het);composite.setVisible(false);// updates();}} catch (Exception e) {// TODO Auto-generated catch blockcomposite.setVisible(false);e.printStackTrace();} doCopy(get); } if(cleanOk){ composite.setVisible(false); composite.dispose(); }}public void paintControl(PaintEvent e) {GC g=e.gc;g.drawImage(bi,width,height); g.setBackground(getDisplay().getSystemColor(SWT.COLOR_RED)); g.setForeground(getDisplay().getSystemColor(SWT.COLOR_RED)); g.drawLine(startX,startY,endX,startY); g.drawLine(startX,endY,endX,endY); g.drawLine(startX,startY,startX,endY); g.drawLine(endX,startY,endX,endY); int x=startX<endX?startX:endX; int y=startY<endY?startY:endY; select=new Rectangle(x,y,Math.abs(endX-startX),Math.abs(endY-startY)); int imageY=y+Math.abs(endY-startY)+5; if(imageY>bi.getBounds().height-20){ imageY=bi.getBounds().height-Math.abs(endY-startY)-30; if(imageY<20){ imageY=5; } } rect=new Rectangle(x+Math.abs(endX-startX)-bagground.getBounds().width, imageY, bagground.getBounds().width, bagground.getBounds().height); g.drawImage(bagground,0,0,bagground.getBounds().width,bagground.getBounds().height,rect.x,rect.y,rect.width,rect.height); saveRect=new Rectangle(rect.x+rect.width-saveImage.getBounds().width-50,rect.y+2,saveImage.getBounds().width,saveImage.getBounds().height); g.drawImage(saveImage,0,0,saveImage.getBounds().width,saveImage.getBounds().height,saveRect.x,saveRect.y,saveRect.width,saveRect.height); cleanRect=new Rectangle(saveRect.x+cleanImage.getBounds().width+2,rect.y+2,cleanImage.getBounds().width,cleanImage.getBounds().height); g.drawImage(cleanImage,0,0,cleanImage.getBounds().width,cleanImage.getBounds().height,cleanRect.x,cleanRect.y,cleanRect.width,cleanRect.height); copyRect=new Rectangle(cleanRect.x+copyImage.getBounds().width+2,rect.y+2,copyImage.getBounds().width,copyImage.getBounds().height); g.drawImage(copyImage,0,0,copyImage.getBounds().width,copyImage.getBounds().height,copyRect.x,copyRect.y,copyRect.width,copyRect.height); int x1=(startX+endX)/2; int y1=(startY+endY)/2; g.fillRectangle(x1-2,startY-2,5,5); g.fillRectangle(x1-2,endY-2,5,5); g.fillRectangle(startX-2,y1-2,5,5); g.fillRectangle(endX-2,y1-2,5,5); g.fillRectangle(startX-2,startY-2,5,5); g.fillRectangle(startX-2,endY-2,5,5); g.fillRectangle(endX-2,startY-2,5,5); g.fillRectangle(endX-2,endY-2,5,5); rec[0]=new Rectangle(x-5,y-5,10,10); rec[1]=new Rectangle(x1-5,y-5,10,10); rec[2]=new Rectangle((startX>endX?startX:endX)-5,y-5,10,10); rec[3]=new Rectangle((startX>endX?startX:endX)-5,y1-5,10,10); rec[4]=new Rectangle((startX>endX?startX:endX)-5,(startY>endY?startY:endY)-5,10,10); rec[5]=new Rectangle(x1-5,(startY>endY?startY:endY)-5,10,10); rec[6]=new Rectangle(x-5,(startY>endY?startY:endY)-5,10,10); rec[7]=new Rectangle(x-5,y1-5,10,10); /*if(showTip){ g.setBackground(getDisplay().getSystemColor(SWT.COLOR_CYAN)); g.fillRectangle(p.x,p.y,170,20); //g.setBackground(getDisplay().getSystemColor(SWT.COLOR_RED)); g.drawRectangle(p.x,p.y,170,20); g.setBackground(getDisplay().getSystemColor(SWT.COLOR_BLACK)); g.setForeground(getDisplay().getSystemColor(SWT.COLOR_BLACK)); g.drawString("请按住鼠标左键不放选择截图区",p.x,p.y+2); }*/}private void openMessageBox(Shell shell, String title, String text) {MessageBox mb = new MessageBox(shell, SWT.ICON_WARNING | SWT.NO);mb.setText(title);mb.setMessage(text);mb.open();}enum States{ NORTH_WEST(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZENW)),//表示西北角 NORTH(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZEN)), NORTH_EAST(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZENE)), EAST(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZEE)), SOUTH_EAST(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZESE)), SOUTH(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZES)), SOUTH_WEST(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZESW)), WEST(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZEW)), MOVE(Display.getCurrent().getSystemCursor(SWT.CURSOR_SIZEALL)), DEFAULT(Display.getCurrent().getSystemCursor(SWT.CURSOR_NO)); private Cursor cs; States(Cursor cs){ this.cs=cs; } public Cursor getCursor(){ return cs; }}public void dragFinished(DragSourceEvent event) {System.out.println("Finished");}public void dragSetData(DragSourceEvent event) {System.out.println("SetData");}public void dragStart(DragSourceEvent event) {System.out.println("Start");}public void dragEnter(DropTargetEvent event) {System.out.println("Enter");}public void dragLeave(DropTargetEvent event) {System.out.println("Leave");}public void dragOperationChanged(DropTargetEvent event) {System.out.println("OperationChanged");}public void dragOver(DropTargetEvent event) {System.out.println("Over");}public void drop(DropTargetEvent event) {System.out.println("drop");}public void dropAccept(DropTargetEvent event) {System.out.println("Accept");}public void Move(int x,int y){ if(current==States.MOVE){ startX+=(x-tempX); startY+=(y-tempY); endX+=(x-tempX); endY+=(y-tempY); tempX=x; tempY=y; }else if(current==States.EAST||current==States.WEST){ if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } }else if(current==States.NORTH||current==States.SOUTH){ if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } }else if(current==States.NORTH_EAST||current==States.NORTH_EAST|| current==States.SOUTH_EAST||current==States.SOUTH_WEST){ if(currentY==START_Y){ startY+=(y-tempY); tempY=y; }else{ endY+=(y-tempY); tempY=y; } if(currentX==START_X){ startX+=(x-tempX); tempX=x; }else{ endX+=(x-tempX); tempX=x; } }else{ startX=tempX; startY=tempY; endX=x; endY=y; } this.redraw();}}

这一段代码在鼠标修改选区的时候还是有一些问题？希望有高手能帮着改一改。以下是代码的执行类：

import org.eclipse.swt.SWT;import org.eclipse.swt.graphics.GC;import org.eclipse.swt.graphics.Image;import org.eclipse.swt.graphics.Rectangle;import org.eclipse.swt.layout.GridData;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Shell;public class TestSrceen {public static void main(String[] args) {Display display=new Display();Shell shell=new Shell(display,SWT.NO_TRIM|SWT.TOOL);Rectangle di = display.getBounds();Image temps = new Image(display, di.width, di.height);GC gc = new GC(display);gc.copyArea(temps, 0, 0);gc.dispose();shell.setSize(di.width,di.height);shell.setLocation(0,0);GridLayout grid=new GridLayout();grid.marginHeight=grid.marginLeft=grid.marginRight=grid.marginTop=0;grid.marginWidth=0;shell.setLayout(grid);TempShell temp=new TempShell(shell,temps);temp.setLayoutData(new GridData(GridData.FILL_BOTH));shell.setVisible(true);shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose();}}

希望对用SWT做屏幕截屏的朋友有帮助。