在主屏幕上使用subpaint()不能正确绘制子级 [英] Use of subpaint() on Mainscreen Doesn't paint child correctly

问题描述

要快速了解问题的背景，请参阅在Blackberry中创建透明主屏幕

To get a quick background of the problem please refer to Create Transparent Mainscreen in Blackberry .

我面临的问题是主屏幕上孩子的绘画.我希望主屏幕看起来像透明/半透明，这是原始要求，并添加其他UI元素，例如经理/最重要的领域.

The problem I am facing is with painting of the child on mainscreen. I wanted my mainscreen to look transparent/translucent as an original requirement and add my other UI elements e.g. managers/field on top of it.

所以我正在使用的UI元素是3个BitmapField，应该使用BorderFactory.createSimpleBorder()创建其粗边框，并为Field.VISUAL_STATE_FOCUS和Field.VISUAL_STATE_NORMAL状态添加两种颜色.所有这些BitmapFields都添加到它们各自的Horizo​​ntalFieldManger中，然后又添加到屏幕中.

So the UI elements I am using are 3 BitmapField(s) which should have its thick border created using BorderFactory.createSimpleBorder() with two colors added for Field.VISUAL_STATE_FOCUS and Field.VISUAL_STATE_NORMAL states. all of these BitmapFields are added in their respective HorizontalFieldManger which in turn are added to the screen.

因此，部分问题是，当我在这些BitmapFields上进行导航时，添加到BitmapFields中的边框的某些区域"不会按照指定的状态(正常，焦点)绘制.

So part of the problem is, when I do navigation across these BitmapFields, "some area" of the border added to the BitmapFields doesn't get painted as per the state (normal, focus) specified.

另一个问题是，在割炬9800上，当我从上到下浏览时，反之亦然，我看到默认滚动发生了，这应该是正常的，但是在每次滚动时，当在滚动.

Other problem is, on torch 9800 when I navigate across from top to bottom or vice versa, i see default scroll happening which should be normal however on each scroll my BitmapField leaves some tail/crack on the screen when movement happened on the scrolling.

当我使用普通屏幕(不使用subpaint来使屏幕透明)时，这些事情都不会发生.

None of such things happen when I use normal screen (not use subpaint to make the screen transparent).

你知道这里发生了什么吗??

Do you have any idea what's happening here..?

• 大O

推荐答案

YMMV，但是我用以下方法制作了透明屏幕:

YMMV, but I've made a transparent screen with this:

public class TranslucentScreen extends Screen {
    public TranslucentScreen() {
        super(new VerticalFieldManager(USE_ALL_WIDTH | NO_VERTICAL_SCROLL));
        setBackground(BackgroundFactory.createSolidTransparentBackground(0x000000, 150));
    }
    protected void sublayout(int width, int height) {
        setPosition(0, 0);
        setExtent(width, height);

        setPositionDelegate(0, 0);
        layoutDelegate(width, height);
    }
}

这是我制作的基本弹出屏幕屏幕，具有半透明的黑色背景.我在屏幕上添加了VerticalFieldManager来控制背景绘画，这正是我想要的方式，然后在其中添加其他Fields.

This was for a basic popup screen screen I made that had a semi-transparent black background. I added a VerticalFieldManager to the screen that I controlled the background painting on so it would be how I wanted it, and then added my other Fields to that.

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