SWT 中实现自绘按钮

gyb — Tue, 13 Feb 2007 07:34:00 GMT

本文参考网上一些网友的文章后改进而成，下面的代码不做详细的说明，只是简单的说明一下。
1、定义一个自绘按钮绘制动作的接口OwnerDrawButtonStyleImp ，代码如下：

package org.eclipse.swt.widgets;

/**
* 自绘按钮绘制接口
*
*
*/
public interface OwnerDrawButtonStyleImp {
public void drawButton(OwnerDrawButton button,int wParam, int lParam);
}

2、创建一个OwnerDrawButton类来作为自绘按钮类，构造为：
public OwnerDrawButton(Composite parent,OwnerDrawButtonStyleImp buttonStyle)
其中OwnerDrawButtonStyleImp 为具体实现绘制工作的接口，完整代码如下：

package org.eclipse.swt.widgets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.internal.win32.*;

/**
* 使用此类来生成一个自绘按钮，根据构造中OwnerDrawButtonStyleImp按钮样式的不同画出不一样的按钮
*
*
*/
public final class OwnerDrawButton extends Button
{
    OwnerDrawButtonStyleImp buttonStyle = null;

    public OwnerDrawButton(Composite parent,OwnerDrawButtonStyleImp buttonStyle){
        super( parent, SWT.DBCS );
        this.buttonStyle = buttonStyle;

        int osStyle = OS.GetWindowLong( handle, OS.GWL_STYLE );
        osStyle |= OS.BS_OWNERDRAW;
        OS.SetWindowLong( handle, OS.GWL_STYLE, osStyle );
    }

    public void setImage(Image image){
        this.image = image;
    }

    public void setText(String text){
        this.text = text;
    }

    LRESULT wmDrawChild( int wParam, int lParam )
    {
        super.wmDrawChild( wParam, lParam );

        buttonStyle.drawButton(this,wParam, lParam);

        return null;
    }

}

3、实现一个自绘按钮的样式，代码如下：

package org.eclipse.swt.widgets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.win32.*;

/**
* 一个自绘按钮的测试样式，实现自绘按钮绘制接口
*
*
*/
public class TestButtonStyle implements OwnerDrawButtonStyleImp {

    OwnerDrawButton button;
    int wParam;
    int lParam;

    private void initParam(OwnerDrawButton button,int wParam, int lParam){
        this.button = button;
        this.wParam = wParam;
        this.lParam = lParam;
    }

    public void drawButton(OwnerDrawButton button,int wParam, int lParam){
        this.initParam(button, wParam, lParam);

        DRAWITEMSTRUCT dis = new DRAWITEMSTRUCT();
        OS.MoveMemory( dis, lParam, DRAWITEMSTRUCT.sizeof );

        Rectangle rc = new Rectangle( dis.left, dis.top, dis.right - dis.left,dis.bottom - dis.top );
        Color clr1 = new Color( button.display, 255, 255, 255 );
        Color clr2 = new Color( button.display, 203, 224, 221 );
        fillGradientRectangle( dis.hDC, rc, true, clr1, clr2 );
        clr1.dispose();
        clr2.dispose();

        Rectangle leftBorder = new Rectangle( rc.x, rc.y, 1,rc.height );
        Rectangle topBorder = new Rectangle( rc.x, rc.y, rc.width,1 );
        Rectangle rightBorder = new Rectangle( rc.width-1, rc.y, 1,rc.height );
        Rectangle bottomBorder = new Rectangle( rc.x, rc.height-1, rc.width,1 );
        Color clr3 = new Color( button.display, 69, 134, 134 );
        fillGradientRectangle( dis.hDC, leftBorder, true, clr3, clr3 );
        fillGradientRectangle( dis.hDC, topBorder, true, clr3, clr3 );
        fillGradientRectangle( dis.hDC, rightBorder, true, clr3, clr3 );
        fillGradientRectangle( dis.hDC, bottomBorder, true, clr3, clr3 );
        clr3.dispose();

        leftBorder = new Rectangle( rc.x+1, rc.y+1, 1,rc.height-2 );
        topBorder = new Rectangle( rc.x+1, rc.y+1, rc.width-2,1 );
        rightBorder = new Rectangle( rc.width-2, rc.y+1, 1,rc.height-2 );
        bottomBorder = new Rectangle( rc.x+1, rc.height-2, rc.width-2,1 );
        Color clr4 = new Color( button.display, 231, 231, 231 );
        fillGradientRectangle( dis.hDC, leftBorder, true, clr4, clr4 );
        fillGradientRectangle( dis.hDC, topBorder, true, clr4, clr4 );
        fillGradientRectangle( dis.hDC, rightBorder, true, clr4, clr4 );
        fillGradientRectangle( dis.hDC, bottomBorder, true, clr4, clr4 );
        clr4.dispose();


        Image image = button.getImage();
        int x = 0, y =0 ,wh = 0;
        if(image!=null){
            x = 10;
            y = 4;
            wh = dis.bottom - dis.top-4-4;
            OS.DrawIconEx(dis.hDC, x, y, image.handle, wh, wh, 0, dis.hDC, SWT.IMAGE_BMP);
        }

        SIZE size = new SIZE();
        char[] chars = button.text.toCharArray();
        int oldFont = OS.SelectObject( dis.hDC, button.getFont().handle );
        OS.GetTextExtentPoint32W( dis.hDC, chars, chars.length, size );
        RECT rcText = new RECT();
        rcText.left = rc.x+wh+x;
        rcText.top = rc.y;
        rcText.right = rc.x + rc.width;
        rcText.bottom = rc.y + rc.height;

        if ( (dis.itemState & OS.ODS_SELECTED) != 0 ){
            OS.OffsetRect( rcText, 1, 1 );
        }
        OS.SetBkMode( dis.hDC, OS.TRANSPARENT );
        OS.DrawTextW( dis.hDC, chars, -1, rcText, OS.DT_SINGLELINE | OS.DT_CENTER | OS.DT_VCENTER );

        RECT focusRect = new RECT();
        focusRect.left = rc.x;
        focusRect.top = rc.y;
        focusRect.right = rc.x + rc.width;
        focusRect.bottom = rc.y + rc.height;

        if(button.isFocusControl()){
            focusRect.left = rc.x+2;
            focusRect.top = rc.y+2;
            focusRect.right = rc.x + rc.width-2;
            focusRect.bottom = rc.y + rc.height-2;
        }

        OS.DrawFocusRect(dis.hDC, focusRect);

        OS.SelectObject( dis.hDC, oldFont );
    }

    private void fillGradientRectangle( int handle, Rectangle rc,
            boolean vertical, Color clr1, Color clr2 )
    {
        final int hHeap = OS.GetProcessHeap();
        final int pMesh = OS.HeapAlloc( hHeap, OS.HEAP_ZERO_MEMORY,
                GRADIENT_RECT.sizeof + TRIVERTEX.sizeof * 2 );
        final int pVertex = pMesh + GRADIENT_RECT.sizeof;

        GRADIENT_RECT gradientRect = new GRADIENT_RECT();
        gradientRect.UpperLeft = 0;
        gradientRect.LowerRight = 1;
        OS.MoveMemory( pMesh, gradientRect, GRADIENT_RECT.sizeof );

        TRIVERTEX trivertex = new TRIVERTEX();
        trivertex.x = rc.x;
        trivertex.y = rc.y;
        trivertex.Red = (short)(clr1.getRed() << 8);
        trivertex.Green = (short)(clr1.getGreen() << 8);
        trivertex.Blue = (short)(clr1.getBlue() << 8);
        trivertex.Alpha = -1;
        OS.MoveMemory( pVertex, trivertex, TRIVERTEX.sizeof );

        trivertex.x = rc.x + rc.width;
        trivertex.y = rc.y + rc.height;
        trivertex.Red = (short)(clr2.getRed() << 8);
        trivertex.Green = (short)(clr2.getGreen() << 8);
        trivertex.Blue = (short)(clr2.getBlue() << 8);
        trivertex.Alpha = -1;
        OS.MoveMemory( pVertex + TRIVERTEX.sizeof, trivertex, TRIVERTEX.sizeof );

        OS.GradientFill( handle, pVertex, 2, pMesh, 1, vertical ? OS.GRADIENT_FILL_RECT_V : OS.GRADIENT_FILL_RECT_H );
        OS.HeapFree( hHeap, 0, pMesh );
    }

}

4、使用自绘按钮，代码如下：

package com.gu.control.swt;

import org.eclipse.swt.events.*;
import org.eclipse.swt.widgets.*;

public class Window{
    private final static Display display = new Display();;
    private Shell shell;

    public Window(){
        shell = new Shell(display);
        shell.setLayout(null);
        init();
        //使窗口永远在最前面
        OS.SetWindowPos(shell.handle , OS.HWND_TOPMOST, 0 , 0 , 800 , 600 , SWT.NULL);
        shell.open();
        while(!shell.isDisposed()){
            if(!display.readAndDispatch()){
                display.sleep();
            }
        }
        display.dispose();
    }

    private void init(){
        Button button;

        button = new OwnerDrawButton(shell,new TestButtonStyle());
        button.setBounds(new Rectangle(20,20,180,25));
        button.setText("Click Me");
        button.setImage(image);

        button.addSelectionListener(new SelectionListener(){
                public void widgetSelected(SelectionEvent event){
                    shell.setText("你好啊，你点了自绘按钮了!");
                }
                public void widgetDefaultSelected(SelectionEvent event){
                    widgetSelected(event);
                }
            }
        );

    }
}

5、效果：

gyb 2007-02-13 15:34 发表评论

SWT中操作ActiveX控件

gyb — Thu, 08 Feb 2007 09:32:00 GMT

1 package com;
2
3
4 import org.eclipse.swt. * ;
5 import org.eclipse.swt.layout. * ;
6 import org.eclipse.swt.widgets. * ;
7 import org.eclipse.swt.ole.win32. * ;
8
9 public class ActiveX {
10 private static final class FLASH_CONTROL {
11    private static final String PROG_ID = " ShockwaveFlash.ShockwaveFlash " ;
12
13    private static final class PROPERTY {
14     private static final int MOVIE = 120 ;
15   }
16 }
17
18 public static void main(String[] args) {
19    final Display display = new Display();
20   Shell shell = new Shell(display);
21   shell.setLayout( new FillLayout());
22   OleControlSite controlSite;
23   OleFrame frame = new OleFrame(shell, SWT.NONE);
24   controlSite = new OleControlSite(frame, SWT.NONE, FLASH_CONTROL.PROG_ID);
25
26   controlSite.doVerb(OLE.OLEIVERB_INPLACEACTIVATE);
27
28    final OleAutomation oleActiveX = new OleAutomation(controlSite);
29   controlSite.dispose();
30    try {
31   } catch (Exception e) {
32    System.out.println( " Unable to open activeX control " );
33     return ;
34   }
35
36   shell.open();
37
38   oleActiveX.setProperty(FLASH_CONTROL.PROPERTY.MOVIE, new Variant[] { new Variant( " file:///t|/ee.flv " )} )
39
40    /* 得到ActiveX中的方法和属性
41    * for(int i=-1000; i<10000; i++){
42    try{
43     String name = oleActiveX.getName(i);
44     if(name!=null){
45      System.out.print(""+i+"  ");
46
47      Variant v = oleActiveX.getProperty(i);
48      if(v==null){
49       System.out.print("method       :"+name+":");
50       System.out.print("     ");
51      }else{
52       System.out.print("property     :"+name+":");
53       System.out.print(v);
54      }
55
56      System.out.println("    "+oleActiveX.getDocumentation(i));
57     }
58    }catch(Exception e){}
59   } */
60
61    while ( ! shell.isDisposed()) {
62     if ( ! display.readAndDispatch())
63     display.sleep();
64   }
65   oleActiveX.dispose();
66   display.dispose();
67 }
68 }
69

gyb 2007-02-08 17:32 发表评论

BlogJava-tianzhihua-文章分类-JAVA SWT

SWT 中实现自绘按钮

SWT中操作ActiveX控件