回车键不触发IDOK默认按钮动作 [英] Enter key does not trigger IDOK Default Push Button action

问题描述

我有一个CDialog派生类。它的界面定义有几个图片框和一些按钮，在资源文件中定义为：
$ b $ pre $ ID $ C $ IDD_SELECT_ITEMS DIALOGEX 0,0,462， 274
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTIONSelect
FONT 8，MS Shell Dlg，0,0,0,0
BEGIN
CONTROL，IDC_ITEM1，Static，SS_BLACKFRAME，13， 18,59,52
// ...
CONTROL，IDC_ITEM18，Static，SS_BLACKFRAME，373,178,59,52
LTEXTSelect，IDC_STATIC，7,256,40， 8
PUSHBUTTONAll，IDC_ALL，47,253,50,14
PUSHBUTTONNone，IDC_NONE，101,253,50,14
PUSHBUTTONFilter ...，IDC_FILTER，155,253,60 ，14
DEFPUSHBUTTONOK，IDOK，353,253,50,14
PUSHBUTTONCancel，IDCANCEL，405,253,50,14
END

在初始化窗体时，按下回车键不会触发与IDOK按钮关联的操作，因为IDC_ALL按钮处于焦点状态，Enter会执行操作，这是不可取的。

在其初始化例程中，

  BOOL CSelectDialog :: OnInitDialog（）
 {
 CDialog :: OnInitDialog（）; 
 // ... 
返回TRUE; //返回TRUE，除非你将焦点设置为一个控件
 // EXCEPTION：OCX属性页面应该返回FALSE 
 
 code $ pre 
 
 
我试着把所有的重点放在IDOK按钮上，但没有成功。为了避免交替评论和取消注释，我补充说：
 
 
  BOOL CSelectParts :: OnInitDialog（）
 {
 SendDlgItemMessage（IDOK，DM_SETDEFID，0）; 
 
 CDialog :: OnInitDialog（）; 
 // ... 
 
 this-> SetDefID（IDOK）; 
 
 GetDlgItem（IDOK） - > SendMessage（BN_SETFOCUS，0，0）; 
 
 SendDlgItemMessage（IDOK，WM_SETFOCUS，0，0）; 
 SendDlgItemMessage（IDOK，BN_SETFOCUS，0，0）; 
 SendDlgItemMessage（IDC_ALL，WM_KILLFOCUS，0，0）; 
 
 SendDlgItemMessage（IDOK，DM_SETDEFID，0,0）; 
 :: SetFocus（GetDlgItem（IDOK） - > GetSafeHwnd（））; 
 
 GetDlgItem（IDOK） - > SetFocus（）; 
返回TRUE; //返回TRUE，除非你将焦点设置为一个控件
 // EXCEPTION：OCX属性页面应该返回FALSE 
 
 code $ pre 
 
 
我得到的越接近，使用
 $ b 
 $ $ $ SendDlgItemMessage（IDOK，WM_SETFOCUS， 0，0）; 
  
做了一件非常奇怪的事情：它在两个按钮上绘制了一个焦点矩形， image： 
 
 
  
 
 
 
但是回车键还没有触发默认的按钮！
 
我甚至尝试添加一个OnOK方法
 
 pre>  void CSelectDialog :: OnOK（）
 {
 __super :: OnOK（）; 
 
 $ / code> 
没有成功！ 
 
 
  ON_COMMAND（IDOK，OnOK）$ b $另外一个实验：我添加了一个入口到类的消息映射b  
仍然不成功！ 
 
 
如何设置Enter键做IDOK按钮的动作？
解决方案
解决方案正好在我眼前留下评论，完全是盲目的，没有看到它！
 
 
 
看到 WM_INITDIALOG 消息 a href =https://msdn.microsoft.com/en-us/library/windows/desktop/ms644995%28v=vs.85%29.aspx =nofollow>对话框编程注意事项我知道我必须返回FALSE。
 
 
我删除了所有我添加的垃圾行，将返回值更改为 FALSE ，并且所有的东西都按预期正常工作：）
I have a CDialog derived class. Its interface definition has several picture boxes and some buttons after, defined in resource file as:
IDD_SELECT_ITEMS DIALOGEX 0, 0, 462, 274
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTION "Select"
FONT 8, "MS Shell Dlg", 0, 0, 0x0
BEGIN
    CONTROL         "",IDC_ITEM1,"Static",SS_BLACKFRAME,13,18,59,52
 //...
    CONTROL         "",IDC_ITEM18,"Static",SS_BLACKFRAME,373,178,59,52
    LTEXT           "Select",IDC_STATIC,7,256,40,8
    PUSHBUTTON      "All",IDC_ALL,47,253,50,14
    PUSHBUTTON      "None",IDC_NONE,101,253,50,14
    PUSHBUTTON      "Filter ...",IDC_FILTER,155,253,60,14
    DEFPUSHBUTTON   "OK",IDOK,353,253,50,14
    PUSHBUTTON      "Cancel",IDCANCEL,405,253,50,14
END
When I init the form, pressing the Enter Key does not trigger the action associated to the IDOK button, because the IDC_ALL button is focused and Enter does its action, which is undesirable.

In its initialization routine,
BOOL CSelectDialog::OnInitDialog() 
{
    CDialog::OnInitDialog();
//...
    return TRUE;  // return TRUE unless you set the focus to a control
                  // EXCEPTION: OCX Property Pages should return FALSE
}
I tried everything to put the focus on the IDOK button, but no success. To the point of getting tired of alternating the  commenting and uncommenting the lines I added:
BOOL CSelectParts::OnInitDialog() 
{
    SendDlgItemMessage(IDOK, DM_SETDEFID, 0);

    CDialog::OnInitDialog();
//  ...

    this->SetDefID(IDOK);

    GetDlgItem(IDOK)->SendMessage(BN_SETFOCUS, 0, 0);

    SendDlgItemMessage(IDOK, WM_SETFOCUS, 0, 0);
    SendDlgItemMessage(IDOK, BN_SETFOCUS, 0, 0);
    SendDlgItemMessage(IDC_ALL, WM_KILLFOCUS, 0, 0);

    SendDlgItemMessage(IDOK, DM_SETDEFID, 0,0);
    ::SetFocus(GetDlgItem(IDOK)->GetSafeHwnd());

    GetDlgItem(IDOK)->SetFocus();
    return TRUE;  // return TRUE unless you set the focus to a control
                  // EXCEPTION: OCX Property Pages should return FALSE
}
The closer I got, was by using the line 
    SendDlgItemMessage(IDOK, WM_SETFOCUS, 0, 0);
which did a very strange thing: it drawed a focus rectangle on two buttons as you can see in the image:



but the Enter key was not yet triggering the Default Push Button!

I even tried to add a OnOK method
void CSelectDialog::OnOK()
{
    __super::OnOK();
}
No success yet!

One more experiment: I added an entry to the class's message map:
ON_COMMAND(IDOK, OnOK)
Still unsuccessful!

How can I manage to put the Enter key to do the IDOK button's action?
解决方案
The solution was right in front of my eyes in a comment, and I was completely blind, not seeing it!

After seeing the end of the "The WM_INITDIALOG Message" section on Dialog Box Programming Considerations, I understood I had to return FALSE.

I eliminated all the trashy lines I added, changed the return value to FALSE, and everything began to work fine as expected :)

                        
这篇关于回车键不触发IDOK默认按钮动作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！