如何實現類似嚮導屏幕的東西？

Question

我想放置一個「下一步」按鈕，單擊它時將顯示另一組組件;我還想放置一個「上一個」按鈕，單擊它後顯示前一組組件。如何實現這一目標？

Answer 1

我最近實現了用於數據輸入的表單。通常我有一個嚮導類，它包含嚮導中的所有表單，因此我可以輕鬆地在它們之間來回導航。當我調用一個新的表單時，我傳遞了該向導的對象。

下面是我的嚮導，省略了實現。

public final class ReportWizard { 

    public static ReportWizard instance = null; 
    Form parent = null; 
    Form titleForm = null; 
    Form budgetForm = null; 
    Form iconForm = null; 

    final Report reports[] = new Report[20]; 

    public ReportWizard(Form parent) { 
     this.parent = parent; 
     this.instance = this; 
    } 

    void getTitle() { 
     AddReportForm reportForm = new AddReportForm(parent, this); 
     reportForm.showReportForm(); 
     titleForm = reportForm; 
     ImageListPicker getIcon = new ImageListPicker(titleForm, reports, this); 
     iconForm = getIcon.imageListForm; 
    } 

    void getIcon() { 
     iconForm.show();   
    } 

    public void cancelWizard() { 

     titleForm = null; 
     iconForm = null; 
     budgetForm = null; 
     instance = null; 

     parent.show(); 
     parent = null; 
     System.gc(); 
    } 
}