主对话框问题中的ShowWindow(SW_HIDE)按钮 [英] ShowWindow(SW_HIDE) button in main dialog problem

问题描述

你好，

我有一个基于对话框的应用.

在主对话框中，我要根据程序中的某些选项设置显示或隐藏一些按钮.

我为我的按钮声明了一个控制值:ctrl_button.
显示或隐藏按钮，我称之为ctrl_button.ShowWindow(SW_HIDE);或SW_SHOW

随后是Invalidate();

但是，这似乎不起作用.


我在子对话框中也是如此，这正常工作.
如果我调用parent-> Invalidate();对孩子来说，主按钮会隐藏！！！
同样，当我最小化最大化对话框时，按钮也会隐藏...

但是当我在主要调用Invalidate()时，什么也没发生.
该按钮仍显示在屏幕上，但不可单击.

我尝试了几种涉及UpdateWindow，RedrawWindow，...的解决方案...

有人有主意吗?

谢谢


PS发生奇怪的事情:
我将按钮默认设置为不可见.
ShowWindow(SW_SHOWS)按钮
但是之后ShowWindow(SW_HIDE)不再隐藏它

Hello,

I have a dialog based app.

In the main dialog I want to show or hide some buttons, according to some option settings in my program.

I declare a control value for my button: ctrl_button.
to show or hide the button I call ctrl_button.ShowWindow(SW_HIDE); or SW_SHOW

followed by Invalidate();

however this does not seem to work.


I do the same in a child dialog and this works properly.
If I call parent->Invalidate(); from the child, the button in the main will hide!!!
Also when I minimize-maximize the dialog the button will hide...

But when I call Invalidate() in the main nothing happens.
The button is still shown on the screen, but is not clickable.

I tried several solutions involving UpdateWindow, RedrawWindow,...

Someone has an idea?

Thanks


PS a strange thing occurs:
I set the button default to invisible.
ShowWindow(SW_SHOWS) the button
but afterwards ShowWindow(SW_HIDE) does not hide it again

推荐答案

让我们说我在对话框中添加了一个名为隐藏我"的按钮，并设置了ID到IDC_BUTTON_HIDE_ME.现在，我需要隐藏它的是双击该按钮并输入:

Let''s say I added some button named `Hide Me` in my dialog and I set the ID to IDC_BUTTON_HIDE_ME. Now, all I need to hide it is to double click on that button and write:

void CMyApplicationDlg::OnBnClickedButtonHideMe()
{
    // `IDC_BUTTON_HIDE_ME` is the ID of that button
    this->GetDlgItem(IDC_BUTTON_HIDE_ME)->ShowWindow(SW_HIDE);
}

// Or in case you created that button manualy
void CMyApplicationDlg::OnBnClickedAnotherHideMe()
{
    // `AnotherHideMeButton` is a CButton class
    this->AnotherHideMeButton->ShowWindow(SW_HIDE);
}

报价:

在主对话框中，根据程序中的某些选项设置，我想显示或隐藏一些按钮.

In the main dialog I want to show or hide some buttons, according to some option settings in my program.

请注意，如果这些选项是可选的，例如此DropBox对话框中的代理设置:

< img src ="https://community.mcafee.com/servlet/JiveServlet/showImage/2-200568-16528/dropbox1.JPG"/> [

Just a simple note, If these options are optional like the proxy settings in this DropBox dialog:

<img src="https://community.mcafee.com/servlet/JiveServlet/showImage/2-200568-16528/dropbox1.JPG"/>[^]

It''s a good idea to use enable and disable instead of hide and show:

void CMyApplicationDlg::OnBnClickedButtonHideMe()
{
    this->GetDlgItem(IDC_BUTTON_HIDE_ME)->EnableWindow(FALSE);
}

void CMyApplicationDlg::OnBnClickedAnotherHideMe()
{
    this->AnotherHideMeButton->EnableWindow(FALSE);
}

您好，

找到了，

我重写了OnEraseBkgnd()以避免某些闪烁.

这阻止了按钮的重绘...

Hello,

found it,

I overrided OnEraseBkgnd() to avoid some flickering.

this blocked the redrawing of the buttons...

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