首选需要将要改变外观的Text的样式设置为SWT.NONE，若设置为SWT.BORDER，则显示比较怪。但设置为SWT.NONE时Text没有Border了。显示也比较怪，边界显示的是灰白色。放在背景色比较淡的容器中，几乎看不到Text的边界和范围。有一种折衷的解决办法，就是在放置Text的容器上为Text模拟绘制一个边界。
eg:text.addPaintListener(new PaintListener(){ public void paintControl(PaintEvent e) { Rectangle recttmp = text.getBounds(); Point size = new Point(recttmp.width,recttmp.height); final int[] pointArray = new int[]{0,2,2,0,size.x-2,0,size.x,2,size.x,size.y-2,size.x-2,size.y,2,size.y,0,size.y-2,0,2}; Region region = new Region(); region.add(pointArray); text.setRegion(region); Color borderColor = new Color(Display.getDefault(),new RGB(202,202,204)); GC gc = new GC(text.getParent()); gc.setForeground(borderColor); //为Text绘制边界 final int[] pointArray2 = new int[]{recttmp.x-1,recttmp.y+2,2+recttmp.x,0+recttmp.y-1,recttmp.x+size.x-2,0+recttmp.y-1,size.x+recttmp.x,2+recttmp.y,size.x+recttmp.x,size.y-2+recttmp.y,size.x-2+recttmp.x-1,size.y+recttmp.y,2+recttmp.x-1,size.y+recttmp.y,0+recttmp.x-1,size.y-2+recttmp.y,0+recttmp.x-1,2+recttmp.y}; gc.drawPolyline(pointArray2); //释放静态资源 borderColor.dispose(); gc.dispose(); region.dispose(); }s }); 说明：final int[] pointArray2 = new int[]{recttmp.x-1,recttmp.y+2,2+recttmp.x,0+recttmp.y-1,recttmp.x+size.x-2,0+recttmp.y-1,size.x+recttmp.x,2+recttmp.y,size.x+recttmp.x,size.y-2+recttmp.y,size.x-2+recttmp.x-1,size.y+recttmp.y,2+recttmp.x-1,size.y+recttmp.y,0+recttmp.x-1,size.y-2+recttmp.y,0+recttmp.x-1,2+recttmp.y}; gc.drawPolyline(pointArray2); pointArray2数组的一些坐标可能需要微调。 另外还有一种方法是，使用Canvas包装一个Text。将Text尽量充满Canvas。同时在canvas的边界绘制一个圆角边界。
eg://文本输入框控件public class CText extends Canvas implements Listener{ private Text text; private Color outerColor = getParent().getBackground(); private Color borderColor = new Color(Display.getDefault(),new RGB(255,0,0));// private Color borderColor = new Color(Display.getDefault(),new RGB(202,202,204)); public CText(Composite parent, int style) { super(parent,/*SWT.BORDER|*/SWT.DOUBLE_BUFFERED); GridLayout gl = new GridLayout(); gl.marginWidth= gl.marginHeight = 0; gl.marginTop = gl.marginBottom = 1; gl.marginLeft = gl.marginRight = 1; this.setLayout(gl); // 网格布局，充满 text = new Text(this, SWT.NONE/*|SWT.BORDER*/); text.setLayoutData(new GridData(GridData.FILL_BOTH)); this.addListener(SWT.Paint, this); this.addListener(SWT.Dispose,this); } //handle event public void handleEvent(Event event) { switch(event.type){ case SWT.Paint:onPaint(event);break; case SWT.Dispose:onDisposed(); } }
//paint private void onPaint(Event e) { Rectangle recttmp = text.getBounds(); Point size = new Point(recttmp.width,recttmp.height); final int[] pointArray = new int[]{0,2,2,0,size.x-2,0,size.x,2,size.x,size.y-2,size.x-2,size.y,2,size.y,0,size.y-2,0,2}; Region region = new Region(); region.add(pointArray); text.setRegion(region); e.gc.setBackground(borderColor); e.gc.setForeground(borderColor); final int[] pointArray2 = new int[]{0,2,2,0,size.x-2+1,0,size.x+1,2,size.x+1,size.y-2+1,size.x-2+1,size.y+1,2,size.y+1,0,size.y-2+1,0,2}; // e.gc.fillPolygon(pointArray2); e.gc.drawPolyline(pointArray2); // GraphicUtils.drawRoundRectangle(gc, rect.x,rect.y , rect.width-1, rect.height,outerColor,borderColor, true, true); }
//disposed private void onDisposed() { if(outerColor!=null && !outerColor.isDisposed()){ outerColor.dispose(); outerColor = null; } if(borderColor!=null && !borderColor.isDisposed()){ borderColor.dispose(); borderColor = null; } } public void setText(String textValue){ text.setText(textValue==null?"":textValue); } public String getText(){ if(this.isDisposed()){ return ""; } return text.getText(); }}
这种办法的一个缺陷是，当你需要使用Text的一些原生方法时，必须为继承自Canvas的类提供大多数的Text的方法接口。一个折衷的办法是Canvas的子类中返回所包装的Text实例。eg:public class CText extends Canvas implements Listener{ private Text text; //....其它代码
public Text getTextControl(){ return this.text; } }
