Eclipse插件开发 swt ComboBoxCellEditor CCombo 下拉框高度

效果图：

 

 

代码如下

bindingPageTableViewer.setCellModifier(new ICellModifier() {

            public boolean canModify(Object element, String property) {
                IBindingPageModel bindingPageModel = (IBindingPageModel) element;
                if (property.equals(bindingPageColumnNameArray[3])) {
                    String[] items = null;
                    if (null == bindingPageModel.getBindingPage()
                            || bindingPageModel.getBindingPage() instanceof IFormPageModel) {
                        items = getPageNameArray(0);
                    } else {
                        items = getPageNameArray(1);
                    }
                    for(int i=0;i<items.length;i++){
                        System.out.println("items : " + items[i]);
                    }

                    cellEditors[3] = new ComboBoxCellEditor(table, items,
                            SWT.READ_ONLY   );

                                        //下拉框高度设置，根据items数组除以2，进行设置
                    CCombo cc = (CCombo)cellEditors[3].getControl();
                    cc.setVisibleItemCount(items.length/2);

                }

                return true;
            }

            public Object getValue(Object element, String property) {
                IBindingPageModel model = (IBindingPageModel) element;

                if (property.equals(bindingPageColumnNameArray[2])) {
                    if (null == model.getBindingPage()
                            || model.getBindingPage() instanceof IFormPageModel) {
                        return new Integer(0);
                    } else {
                        return new Integer(1);
                    }
                }
                if (property.equals(bindingPageColumnNameArray[3])) {
                    String[] pageItems = ((ComboBoxCellEditor) cellEditors[3])
                            .getItems();
                    System.out.println("cellEditors[3] : " + cellEditors[3]);
                    String pageName = "";
                    if (null != model.getBindingPage()) {
                        pageName = model.getBindingPage().getName();
                        System.out.println("pageName:" + pageName);
                    }
                    for (int i = 0, length = pageItems.length; i < length; i++) {
                        if (pageItems[i].equals(pageName)) {
                            return new Integer(i);
                        }
                    }
                    return new Integer(0);
                }
                return null;
            }

            public void modify(Object element, String property, Object value) {
                IBindingPageModel model = null;
                IPageModel pageModel = null;
                if (element instanceof Item)
                    model = (IBindingPageModel) ((Item) element).getData();

                if (property.equals(bindingPageColumnNameArray[2])) {
                    int pageTypeValue = ((Integer) value).intValue();
                    ComboBoxCellEditor pageCellEditor = (ComboBoxCellEditor) cellEditors[3];
                    String[] pageNameArray = getPageNameArray(pageTypeValue);
                    pageCellEditor.setItems(pageNameArray);

                    if (pageTypeValue == 0
                            && !(model.getBindingPage() instanceof IFormPageModel)) {
                        if (pageNameArray.length > 0) {
                            String pageName = pageNameArray[0];
                            pageModel = getFormModel().getPageByName(pageName);
                            model.setBindingPage(pageModel);
                        } else {
                            model.setBindingPage(ModelFactory.getInstance()
                                    .newFormPageModel());
                        }
                    }
                    if (pageTypeValue == 1
                            && !(model.getBindingPage() instanceof IInterfacePageModel)) {
                        if (pageNameArray.length > 0) {
                            String pageName = pageNameArray[0];
                            pageModel = getInterfacePageByName(pageName);
                            model.setBindingPage(pageModel);
                        } else {
                            model.setBindingPage(ModelFactory.getInstance()
                                    .newInterfacePageModel());
                        }
                    }
                }
                if (property.equals(bindingPageColumnNameArray[3])) {
                    int pageValue = ((Integer) value).intValue();
                    String[] cellItems = ((ComboBoxCellEditor) cellEditors[3])
                            .getItems();
                    String pageName = null;
                    if (pageValue >= 0 && cellItems.length > 0) {
                        pageName = cellItems[pageValue];
                        System.out.println("pageName: " + pageName);
                    }

                    if (model.getBindingPage() instanceof IFormPageModel) {
                        pageModel = getFormModel().getPageByName(pageName);
                        if (pageModel == null
                                || pageModel.equals(model.getBindingPage())) {
                            pageModel = null;
                        } else {
                            model.setBindingPage(pageModel);
                        }
                    } else if (model.getBindingPage() instanceof IInterfacePageModel) {
                        pageModel = getInterfacePageByName(pageName);
                        if (pageModel == null
                                || pageModel.equals(model.getBindingPage())) {
                            pageModel = null;
                        } else {
                            model.setBindingPage(pageModel);
                        }
                    }
                }
                if (null != pageModel) {
                    model.getBindingParameterList().clear();
                    model.getBindingOperationList().clear();
                }

                bindingPageTableViewer.refresh();
                updatePageStates(model);
            }
        });

 

核心思想：

CellEditor cellEditor = new ComboBoxCellEditor(table, items,SWT.READ_ONLY);

//拿到control，进行高度设置即可，如果直接使用的是CCombo下拉框，上面那行代码都不用要，就可以设置下来高度。

CCombo cc = (CCombo)cellEditor.getControl();

cc.setVisibleItemCount(items.length/2);

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