如何在RCP程式中添加一個banner欄，rcp添加banner欄

如何在RCP程式中添加一個banner欄，rcp添加banner欄

前言：這段時間還算比較空閑，我準備把過去做過的有些形形色色，甚至有些奇怪的研究總結一下，也許剛好有人用的著也不一定，不枉為之抓耳撓腮的時光和浪費的電力。以前有個客戶提出要在RCP程式中添加一個banner欄，研究了很久才搞定。代碼是基於eclipse4.3.2的。

先看一下效果預覽：

public class CustomTrimmedPartLayout extends TrimmedPartLayout { public Composite banner; /** * This layout is used to support parts that want trim for their containing * composites. * * @param trimOwner */ public CustomTrimmedPartLayout(Composite parent) { super(parent); banner = new Composite(parent, SWT.NONE); GridLayout gridLayout = new GridLayout(1, false); gridLayout.horizontalSpacing=0; gridLayout.verticalSpacing = 0; gridLayout.marginHeight = 0; gridLayout.marginWidth = 0

;        banner.setLayout(gridLayout);        //banner.setLayoutData(new GridData(GridData.FILL_BOTH));    }        protected void layout(Composite composite, boolean flushCache) {        Rectangle ca = composite.getClientArea();        Rectangle caRect = new Rectangle(ca.x, ca.y, ca.width, ca.height);        

// 'banner' spans the entire area if (banner != null && banner.isVisible() ) { Point bannerSize = banner.computeSize(caRect.width, SWT.DEFAULT, true); // Don't layout unless we've changed Rectangle newBounds = new Rectangle(caRect.x, caRect.y, bannerSize.x, bannerSize.y); caRect.y += bannerSize.y; caRect.height -= bannerSize.y; if (!

newBounds.equals(banner.getBounds())) {                    banner.setBounds(newBounds);            }        }                        // 'Top' spans the entire area                 if (top != null && top.isVisible()) {            Point topSize = top.computeSize(caRect.width, SWT.DEFAULT, true);            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x, caRect.y, caRect.width,                    topSize.y);            if (!newBounds.equals(top.getBounds())) {                top.setBounds(newBounds);            }                        caRect.y += topSize.y;            caRect.height -= topSize.y;        }                // Include the gutter whether there is a top area or not.        caRect.y += gutterTop;        caRect.height -= gutterTop;        // 'Bottom' spans the entire area        if (bottom != null && bottom.isVisible()) {            Point bottomSize = bottom.computeSize(caRect.width, SWT.DEFAULT,                    true);            caRect.height -= bottomSize.y;            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x, caRect.y                    + caRect.height, caRect.width, bottomSize.y);            if (!newBounds.equals(bottom.getBounds())) {                bottom.setBounds(newBounds);            }        }        caRect.height -= gutterBottom;        // 'Left' spans between 'top' and 'bottom'        if (left != null && left.isVisible()) {            Point leftSize = left.computeSize(SWT.DEFAULT, caRect.height, true);            caRect.x += leftSize.x;            caRect.width -= leftSize.x;            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x - leftSize.x,                    caRect.y, leftSize.x, caRect.height);            if (!newBounds.equals(left.getBounds())) {                left.setBounds(newBounds);            }        }        caRect.x += gutterLeft;        caRect.width -= gutterLeft;        // 'Right' spans between 'top' and 'bottom'        if (right != null && right.isVisible()) {            Point rightSize = right.computeSize(SWT.DEFAULT, caRect.height,                    true);            caRect.width -= rightSize.x;            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x + caRect.width,                    caRect.y, rightSize.x, caRect.height);            if (!newBounds.equals(right.getBounds())) {                right.setBounds(newBounds);            }        }        caRect.width -= gutterRight;        // Don't layout unless we've changed        if (!caRect.equals(clientArea.getBounds())) {            clientArea.setBounds(caRect);        }    }}

 

如果我們希望Banner放在工具列下面，而不是上面，只要稍微修改一下代碼的位置

public class CustomTrimmedPartLayout extends TrimmedPartLayout {public Composite banner;    /**     * This layout is used to support parts that want trim for their containing     * composites.     *      * @param trimOwner     */    public CustomTrimmedPartLayout(Composite parent) {        super(parent);        banner 

= new Composite(parent, SWT.NONE); GridLayout gridLayout = new GridLayout(1, false); gridLayout.horizontalSpacing=0; gridLayout.verticalSpacing = 0; gridLayout.marginHeight = 0; gridLayout.marginWidth = 0

;        banner.setLayout(gridLayout);        //banner.setLayoutData(new GridData(GridData.FILL_BOTH));    }        protected void layout(Composite composite, boolean flushCache) {        Rectangle ca = composite.getClientArea();        Rectangle caRect = new Rectangle(ca.x, ca.y, ca.width, ca.height);                        // 'Top' spans the entire area                 if (top != null && top.isVisible()) {            Point topSize = top.computeSize(caRect.width, SWT.DEFAULT, true);            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x, caRect.y, caRect.width,                    topSize.y);            if (!newBounds.equals(top.getBounds())) {                top.setBounds(newBounds);            }                        caRect.y += topSize.y;            caRect.height -= topSize.y;        }                

// 'banner' spans the entire area if (banner != null && banner.isVisible()) { Point bannerSize = banner.computeSize(caRect.width, SWT.DEFAULT, true); // Don't layout unless we've changed Rectangle newBounds = new Rectangle(caRect.x, caRect.y, bannerSize.x, bannerSize.y); caRect.y += bannerSize.y; caRect.height -= bannerSize.y; if (!

newBounds.equals(banner.getBounds())) {                        banner.setBounds(newBounds);                }            }                // Include the gutter whether there is a top area or not.        caRect.y += gutterTop;        caRect.height -= gutterTop;        // 'Bottom' spans the entire area        if (bottom != null && bottom.isVisible()) {            Point bottomSize = bottom.computeSize(caRect.width, SWT.DEFAULT,                    true);            caRect.height -= bottomSize.y;            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x, caRect.y                    + caRect.height, caRect.width, bottomSize.y);            if (!newBounds.equals(bottom.getBounds())) {                bottom.setBounds(newBounds);            }        }        caRect.height -= gutterBottom;        // 'Left' spans between 'top' and 'bottom'        if (left != null && left.isVisible()) {            Point leftSize = left.computeSize(SWT.DEFAULT, caRect.height, true);            caRect.x += leftSize.x;            caRect.width -= leftSize.x;            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x - leftSize.x,                    caRect.y, leftSize.x, caRect.height);            if (!newBounds.equals(left.getBounds())) {                left.setBounds(newBounds);            }        }        caRect.x += gutterLeft;        caRect.width -= gutterLeft;        // 'Right' spans between 'top' and 'bottom'        if (right != null && right.isVisible()) {            Point rightSize = right.computeSize(SWT.DEFAULT, caRect.height,                    true);            caRect.width -= rightSize.x;            // Don't layout unless we've changed            Rectangle newBounds = new Rectangle(caRect.x + caRect.width,                    caRect.y, rightSize.x, caRect.height);            if (!newBounds.equals(right.getBounds())) {                right.setBounds(newBounds);            }        }        caRect.width -= gutterRight;        // Don't layout unless we've changed        if (!caRect.equals(clientArea.getBounds())) {            clientArea.setBounds(caRect);        }    }}

 

最後，我們需要把shell載入的layout從TrimmedPartLayout替換為CustomTrimmedPartLayout。

在ApplicationWorkbenchWindowAdvisor 的preWindowOpen中添加如下代碼：

public class ApplicationWorkbenchWindowAdvisor extends WorkbenchWindowAdvisor {...    public void preWindowOpen() {        IWorkbenchWindowConfigurer configurer = getWindowConfigurer();        configurer.setInitialSize(new Point(600, 400));        configurer.setShowCoolBar(true);        configurer.setShowPerspectiveBar(true);        configurer.setShowStatusLine(true);        configurer.setShowProgressIndicator(false);        configurer.setShowFastViewBars(false);                IWorkbenchWindow workbenchWindow=  configurer.getWindow();        workbenchWindow=  configurer.getWindow();                Shell shell 

= workbenchWindow.getShell(); TrimmedPartLayout layout = (TrimmedPartLayout)shell.getLayout(); CustomTrimmedPartLayout customLayout = new CustomTrimmedPartLayout(layout.clientArea.getParent()); customLayout.clientArea =

 layout.clientArea;        shell.setLayout(customLayout);        Label bannerLabel 

= new Label(customLayout.banner, SWT.SIMPLE|SWT.CENTER); customLayout.banner.setBackground(…); GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true); bannerLabel.setLayoutData(gridData); Image image =

 Activator.getImageDescriptor(bannerExtensionPoint.getImage()).createImage();        bannerLabel.setImage(image);    }....}

 

其中 ---

標記為綠色的代碼是用來替換Layout類的

標記為藍色的代碼是用來在banner中建立一個Label，並載入一張作為banner的圖片。