Question

我正在研究SWT在我的要求中，我希望在单击按钮时在复合的相同位置显示两种不同的形式，因此我使用StackLayout创建了一个Composite。我可以相应地渲染两种形式（具有不同形式的子复合），但问题是我的一种形式是橙色背景而另一种形式是透明的。 当我从透明移动到橙色复合材料时，它可以正常工作。但是当我从Orange移动到透明复合材料时，橙色复合材料在背景中仍然可见。当我切换到不同的窗口并移回我的视图时，它只显示透明复合材料，这是我的要求。我尝试但是无法在点击按钮时立即获得透明复合.Below是我的代码片段。

\\ the container composite with stacklayout.    
bottomComposite = new Composite(parent, SWT.NO_BACKGROUND);
        bottomCompositLayOut = new StackLayout();
        bottomComposite.layout(true);

\\first form composite
formComposite = new Composite(bottomComposite, SWT.NONE);
        GridLayout formLayout = new GridLayout(3, false);
        formLayout.marginTop = 10;
        formLayout.horizontalSpacing = 20;
        formComposite.setLayout(formLayout);

        formComposite.setBackground(orange);
        GridData formCompositeData = new GridData();
        formCompositeData.widthHint = 800;
        formCompositeData.heightHint = 200;
        formCompositeData.horizontalAlignment = SWT.CENTER;
        formComposite.setLayoutData(formCompositeData);

\\Second transparent composite
progressComposite = new Composite(bottomComposite, SWT.NO_BACKGROUND);
        GridLayout progressLayout = new GridLayout(1, false);
        progressLayout.verticalSpacing = 1;
        progressLayout.marginTop = 1;
        progressComposite.setLayout(progressLayout);
        //progressComposite.setBackground(SWTResourceManager.getColor(SWT.COLOR_WHITE));
        GridData progressCompositeData = new GridData();
        progressCompositeData.widthHint = 800;
        progressCompositeData.heightHint = 200;
        progressCompositeData.horizontalAlignment = SWT.CENTER;
        progressComposite.setLayoutData(progressCompositeData);


//Works properly when I am doing 
bottomComposite.topcontrol = formComposite;

//Shows other form when I made transperent composite to top control.
bottomComposite.topcontrol = progressComposite;

使用透明复合SWT进行堆叠布局

0 个答案: