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分享如何在dialog创建并绘制完成后第一时间运行我的函数
我想在dialog绘制完成后第一时间运行我的函数，但是并没有找到像WM_PAINT_FINISH之类的消息，所以我在dialog的回调函数里应该怎么写？
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schlafenhamster 2017-05-06
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“这个不是MFC吗？”
MFC 是 api 的 包装， win32 是
DialogBox
DialogBoxIndirect
DialogBoxIndirectParam
DialogBoxParam
。。。
null.space 2017-05-05
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没懂。。。
null.space 2017-05-05
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这个不是MFC吗？
schlafenhamster 2017-05-05
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1 一开始
void CAboutDlg::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: Add your message handler code here
// Do not call CDialog::OnPaint() for painting messages
}
//
注意 CPaintDC dc(this); 这句 将 给 对话框 里 所有 控件 发 Invalidate ，这样
所有控件 的 窗口 将 成为 ‘无效区’
2 接着 // TODO: 中你加入 绘制 对话框 本身的 语句。
3 然后 OnPaint 退出。
这时 所有 子窗口（控件）是 无效的 ，所以 系统 会 进入 各个控件的 绘制 中（OnPaint）
如果你在 对话框 的 OnPaint 中 运行 别的函数。 控件 就可能 没有 绘制 完
赵4老师 2017-05-03
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《深入浅出MFC》？
null.space 2017-05-02
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这个方法我也考虑过，但是有延迟的话不是很舒服。。。
null.space 2017-05-02
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我不用mfc哈。。
null.space 2017-05-02
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我可能没说清楚。。。我的函数需要绘制完成后再调用的原因是，这个函数会运行很长一段时间，因此我希望我一打开这个程序，程序会先绘制完自己的界面，绘制完之后再运行我的函数。但是实际上我并不想和WM_PAINT消息扯上关系，因为一旦和WM_PAINT扯上关系，那么每次绘制完之后都会运行一遍我的函数。我仅需要程序启动后、界面初始化完成后，运行一遍我的程序。
举个栗子就拿电脑版的QQ来说吧，QQ有个自动登录，开启自动登录后，一打开qq就会第一时间自己自动登录qq，不需要我手动点击“登录”。我想实现的和这个一样，打开后自动运行我的功能。
另外我不用mfc。。。。
schlafenhamster 2017-05-02
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不是 “CDialog::OnInitDialog”
是“CxxxDialog::OnPaint” 退出时，子窗口 可能 还没有 绘制。最好是 单次 timer。
schlafenhamster 2017-05-02
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“CDialog::OnInitDialog” 退出时， 子窗口 可能 还没有 绘制。最好是 单次 timer。
赵4老师 2017-05-02
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我不用mfc哈。。[/quote]
你以为你不用MFC，MFC的帮助就对你没用了？
CDialog::OnInitDialog
virtual BOOL OnInitDialog( );
Return Value
Specifies whether the application has set the input focus to one of the controls in the dialog box. If OnInitDialog returns nonzero, Windows sets the input focus to the first control in the dialog box. The application can return 0 only if it has explicitly set the input focus to one of the controls in the dialog box.
Remarks
This member function is called in response to the WM_INITDIALOG message. This message is sent to the dialog box during the Create, CreateIndirect, or DoModal calls, which occur immediately before the dialog box is displayed.
Override this member function if you need to perform special processing when the dialog box is initialized. In the overridden version, first call the base class OnInitDialog but disregard its return value. You will normally return TRUE from your overridden member function.
Windows calls the OnInitDialog function via the standard global dialog-box procedure common to all Microsoft Foundation Class Library dialog boxes, rather than through your message map, so you do not need a message-map entry for this member function.
CDialog Overview | Class Members | Hierarchy Chart
See Also CDialog::Create, CDialog::CreateIndirect,WM_INITDIALOG
WM_INITDIALOG
The WM_INITDIALOG message is sent to the dialog box procedure immediately before a dialog box is displayed. Dialog box procedures typically use this message to initialize controls and carry out any other initialization tasks that affect the appearance of the dialog box.
WM_INITDIALOG
hwndFocus = (HWND) wParam; // handle of control to receive focus
lInitParam = lParam; // initialization parameter
Parameters
hwndFocus
Value of wParam. Identifies the control to receive the default keyboard focus. The system assigns the default keyboard focus only if the dialog box procedure returns TRUE.
lInitParam
Value of lParam. Specifies additional initialization data. This data is passed to the system as the lParamInit parameter in a call to the CreateDialogIndirectParam, CreateDialogParam, DialogBoxIndirectParam, or DialogBoxParam function used to create the dialog box. For property sheets, this parameter is a pointer to thePROPSHEETPAGE structure used to create the page. This parameter is zero if any other dialog box creation function is used.
Return Values
The dialog box procedure should return TRUE to direct the system to set the keyboard focus to the control given by hwndFocus. Otherwise, it should return FALSE to prevent the system from setting the default keyboard focus.
The dialog box procedure should return the value directly. The DWL_MSGRESULT value set by the SetWindowLong function is ignored.
Remarks
The control to receive the default keyboard focus is always the first control in the dialog box that is visible, not disabled, and that has the WS_TABSTOP style. When the dialog box procedure returns TRUE, the system checks the control to ensure that the procedure has not disabled it. If it has been disabled, the system sets the keyboard focus to the next control that is visible, not disabled, and has the WS_TABSTOP.
An application can return FALSE only if it has set the keyboard focus to one of the controls of the dialog box.
QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.
See Also
Dialog Boxes Overview, Dialog Box Messages, CreateDialogIndirectParam, CreateDialogParam, DialogBoxIndirectParam, DialogBoxParam,PROPSHEETPAGE, SetFocus
worldy 2017-05-02
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我可能没说清楚。。。我的函数需要绘制完成后再调用的原因是，这个函数会运行很长一段时间，因此我希望我一打开这个程序，程序会先绘制完自己的界面，绘制完之后再运行我的函数。但是实际上我并不想和WM_PAINT消息扯上关系，因为一旦和WM_PAINT扯上关系，那么每次绘制完之后都会运行一遍我的函数。我仅需要程序启动后、界面初始化完成后，运行一遍我的程序。
举个栗子就拿电脑版的QQ来说吧，QQ有个自动登录，开启自动登录后，一打开qq就会第一时间自己自动登录qq，不需要我手动点击“登录”。我想实现的和这个一样，打开后自动运行我的功能。
另外我不用mfc。。。。[/quote]
设置一个成员变量或者全局变量，BOOL bDone=FALSE
void OnPaint（）
{
.................//绘制窗口
if(!bDone)
{
你的特殊函数(....);
bDone=TRUE;//第一次执行后，以后就不再执行
}
}
zgl7903 2017-05-02
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WM_PAINT 的消息响应中调用你的函数
schlafenhamster 2017-05-02
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"但是有延迟的话不是很舒服"
那 200ms 是 paint 用的 ，没有 延迟。可改 小点。
schlafenhamster 2017-05-02
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因为 "CxxxDialog::OnPaint” 退出时，子窗口 可能 还没有 绘制。"
所以必须 在对话框 OnPaint 中 把 所有 子窗口（控件）都 绘制 出来。（UpdateWindow））
null.space 2017-05-02
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我不用mfc哈。。[/quote]
你以为你不用MFC，MFC的帮助就对你没用了？
CDialog::OnInitDialog
virtual BOOL OnInitDialog( );
Return Value
Specifies whether the application has set the input focus to one of the controls in the dialog box. If OnInitDialog returns nonzero, Windows sets the input focus to the first control in the dialog box. The application can return 0 only if it has explicitly set the input focus to one of the controls in the dialog box.
Remarks
This member function is called in response to the WM_INITDIALOG message. This message is sent to the dialog box during the Create, CreateIndirect, or DoModal calls, which occur immediately before the dialog box is displayed.
Override this member function if you need to perform special processing when the dialog box is initialized. In the overridden version, first call the base class OnInitDialog but disregard its return value. You will normally return TRUE from your overridden member function.
Windows calls the OnInitDialog function via the standard global dialog-box procedure common to all Microsoft Foundation Class Library dialog boxes, rather than through your message map, so you do not need a message-map entry for this member function.
CDialog Overview | Class Members | Hierarchy Chart
See Also CDialog::Create, CDialog::CreateIndirect,WM_INITDIALOG
WM_INITDIALOG
The WM_INITDIALOG message is sent to the dialog box procedure immediately before a dialog box is displayed. Dialog box procedures typically use this message to initialize controls and carry out any other initialization tasks that affect the appearance of the dialog box.
WM_INITDIALOG
hwndFocus = (HWND) wParam; // handle of control to receive focus
lInitParam = lParam; // initialization parameter
Parameters
hwndFocus
Value of wParam. Identifies the control to receive the default keyboard focus. The system assigns the default keyboard focus only if the dialog box procedure returns TRUE.
lInitParam
Value of lParam. Specifies additional initialization data. This data is passed to the system as the lParamInit parameter in a call to the CreateDialogIndirectParam, CreateDialogParam, DialogBoxIndirectParam, or DialogBoxParam function used to create the dialog box. For property sheets, this parameter is a pointer to thePROPSHEETPAGE structure used to create the page. This parameter is zero if any other dialog box creation function is used.
Return Values
The dialog box procedure should return TRUE to direct the system to set the keyboard focus to the control given by hwndFocus. Otherwise, it should return FALSE to prevent the system from setting the default keyboard focus.
The dialog box procedure should return the value directly. The DWL_MSGRESULT value set by the SetWindowLong function is ignored.
Remarks
The control to receive the default keyboard focus is always the first control in the dialog box that is visible, not disabled, and that has the WS_TABSTOP style. When the dialog box procedure returns TRUE, the system checks the control to ensure that the procedure has not disabled it. If it has been disabled, the system sets the keyboard focus to the next control that is visible, not disabled, and has the WS_TABSTOP.
An application can return FALSE only if it has set the keyboard focus to one of the controls of the dialog box.
QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.
See Also
Dialog Boxes Overview, Dialog Box Messages, CreateDialogIndirectParam, CreateDialogParam, DialogBoxIndirectParam, DialogBoxParam,PROPSHEETPAGE, SetFocus
[/quote]
然而WM_INITDIALOG我早就试过了，但是这个消息只是告诉Windows要初始化dialog，并不是dialog已经初始化完成。在dialog回调函数的WM_INITDIALOG消息处理里加上我的函数之后，依然是先运行我的函数，然后再绘制dialog
schlafenhamster 2017-04-29
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初始化一个Timer （200ms）
在OnTimer中 killtimer， 后 执行你的 程序。
赵4老师 2017-04-28
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OnInitDialog
叶恭介叶恭介 2017-04-28
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无理问题。
worldy 2017-04-28
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OnPaint是一个随机调用的函数（WM_PAINT消息发生在如何需要重绘的时候），为什么你的函数需要在绘制完成后调用？
如果只是这样的要求，你在OnPaint实现的最后一条指令调用你的函数就是
void OnPaint（）
{
.................//绘制窗口
你的特殊函数(....);
}
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