问题描述
我们有一个销售点应用程序,在此应用程序中,我们有一个滚动框容器。如果卖方选择一种产品,则会创建一个新产品行并将其插入到滚动框中。产品行组件是一个框架-内有文本框,按钮和标签。
We have a point-of-sale application and in this application we have a scrollbox container. If the seller selects a product, then a new product row is created and inserted into the scrollbox. The product row component is a frame - textboxes, buttons and labels in it.
但是,在运行时将此产品行控件插入到滚动框中会出现一个小问题。太慢了我可以看到选择产品是如何将edittext组件缓慢地拖动到滚动框中的。
But here's a little problem by inserting this product row control into the scrollbox at runtime. It's slow. I can see how selecting product draws edittext components slowly into the scrollbox.
我试图设置组件的可见性
在 ScrollBox.InsertControl
之前为false,然后在之后启用它,但这并不能大大加快处理速度。我也读过有关DisableAlign / EnableAlign的内容,但我不知道确切将代码行放在何处。
I tried to set the components' visibility
to false before ScrollBox.InsertControl
and enabling it after, but it doesn't help speed up things very much. Also I read about DisableAlign/EnableAlign thing, but I don't know exactly where I have to put this line of code.
如何加快插入此自定义组件的速度
How can I speed up inserting this custom component into the form's scrollbox container?
推荐答案
TScrollBox没有BeginUpdate / EndUpdate,但是。我可能会避免使用诸如 LockWindowUpdate 。
TScrollBox doesn't have BeginUpdate/EndUpdate, but you can get the same effect using WM_SETREDRAW messages. I would probably avoid more heavy handed methods like LockWindowUpdate.
SendMessage(ScrollBox1.Handle, WM_SETREDRAW, 0, 0);
try
// add controls to scrollbox
// set scrollbox height
finally
SendMessage(ScrollBox1.Handle, WM_SETREDRAW, 1, 0);
RedrawWindow(ScrollBox1.Handle, nil, 0, RDW_ERASE or RDW_INVALIDATE or RDW_FRAME or RDW_ALLCHILDREN);
end;
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