COccManager Class

Manages various custom control sites; implemented by COleControlContainer and COleControlSite objects.

Syntax

class COccManager : public CNoTrackObject

Members

Public Methods

Remarks

The base class, CNoTrackObject, is an undocumented base class (located in AFXTLS.H). Designed for use by the MFC framework, classes derived from the CNoTrackObject class are exempt from memory leak detection. It is not recommended that you derive directly from CNoTrackObject.

Inheritance Hierarchy

CNoTrackObject

COccManager

Requirements

Header: afxocc.h

COccManager::CreateContainer

Called by the framework to create a control container.

virtual COleControlContainer* CreateContainer(CWnd* pWnd);

Parameters

pWnd
A pointer to the window object associated with the custom site container.

Return Value

A pointer to the newly created container; otherwise NULL.

Remarks

For more information on creating custom sites, see COleControlContainer::AttachControlSite.

COccManager::CreateDlgControls

Call this function to create ActiveX controls specified by the pOccDialogInfo parameter.

virtual BOOL CreateDlgControls(
    CWnd* pWndParent,
    LPCTSTR lpszResourceName,
    _AFX_OCC_DIALOG_INFO* pOccDialogInfo);

virtual BOOL CreateDlgControls(
    CWnd* pWndParent,
    void* lpResource,
    _AFX_OCC_DIALOG_INFO* pOccDialogInfo);

Parameters

pWndParent
A pointer to the parent of the dialog object.

lpszResourceName
The name of the resource being created.

pOccDialogInfo
A pointer to the dialog template used to create the dialog object.

lpResource
A pointer to a resource.

Return Value

Nonzero if the control was created successfully; otherwise zero.

COccManager::CreateSite

Called by the framework to create a control site, hosted by the container pointed to by pCtrlCont.

virtual COleControlSite* CreateSite(COleControlContainer* pCtrlCont);

Parameters

pCtrlCont
A pointer to the control container hosting the new control site.

Return Value

A pointer to the newly created control site.

Remarks

Override this function to create a custom control site, using your COleControlSite-derived class.

Each control container can host multiple sites. Create additional sites with multiple calls to CreateSite.

COccManager::GetDefBtnCode

Call this function to determine if the control is a default push button.

static DWORD AFX_CDECL GetDefBtnCode(CWnd* pWnd);

Parameters

pWnd
The window object containing the button control.

Return Value

One of the following values:

• DLGC_DEFPUSHBUTTON Control is the default button in the dialog.

• DLGC_UNDEFPUSHBUTTON Control is not the default button in the dialog.

• 0 Control is not a button.

COccManager::IsDialogMessage

Called by the framework to determine whether a message is intended for the specified dialog box and, if it is, processes the message.

virtual BOOL IsDialogMessage(
    CWnd* pWndDlg,
    LPMSG lpMsg);

Parameters

pWndDlg
A pointer to the intended target dialog of the message.

lpMsg
A pointer to an MSG structure that contains the message to be checked.

Return Value

Nonzero if the message is processed; otherwise zero.

Remarks

The default behavior of IsDialogMessage is to check for keyboard messages and convert them into selections for the corresponding dialog box. For example, the TAB key, when pressed, selects the next control or group of controls.

Override this function to provide custom behavior for messages sent to the specified dialog.

COccManager::IsLabelControl

Call this function to determine if the specified control is a label control.

static BOOL AFX_CDECL IsLabelControl(CWnd* pWnd);
static BOOL AFX_CDECL IsLabelControl(COleControlSiteOrWnd* pWnd);

Parameters

pWnd
A pointer to the window containing the control.

Return Value

Nonzero if the control is a label; otherwise zero

Remarks

A label control is one that acts like a label for whatever control is next in the ordering.

COccManager::IsMatchingMnemonic

Call this function to determine if the current mnemonic matches that represented by the control.

static BOOL AFX_CDECL IsMatchingMnemonic(
    CWnd* pWnd,
    LPMSG lpMsg);

static BOOL AFX_CDECL IsMatchingMnemonic(
    COleControlSiteOrWnd* pWnd,
    LPMSG lpMsg);

Parameters

pWnd
A pointer to the window containing the control.

lpMsg
A pointer to the message containing the mnemonic to match.

Return Value

Nonzero if the mnemonic matches the control; otherwise zero

Remarks

COccManager::OnEvent

Called by the framework to handle the specified event.

virtual BOOL OnEvent(
    CCmdTarget* pCmdTarget,
    UINT idCtrl,
    AFX_EVENT* pEvent,
    AFX_CMDHANDLERINFO* pHandlerInfo);

Parameters

pCmdTarget
A pointer to the CCmdTarget object attempting to handle the event

idCtrl
The resource ID of the control.

pEvent
The event being handled.

pHandlerInfo
If not NULL, OnEvent fills in the pTarget and pmf members of the AFX_CMDHANDLERINFO structure instead of dispatching the command. Typically, this parameter should be NULL.

Return Value

Nonzero if the event was handled, otherwise zero.

Remarks

Override this function to customize the default event-handling process.

COccManager::PreCreateDialog

Called by the framework to process a dialog template for ActiveX controls before creating the actual dialog box.

virtual const DLGTEMPLATE* PreCreateDialog(
    _AFX_OCC_DIALOG_INFO* pOccDialogInfo,
    const DLGTEMPLATE* pOrigTemplate);

Parameters

pOccDialogInfo
An _AFX_OCC_DIALOG_INFO structure containing information on the dialog template and any ActiveX controls hosted by the dialog.

pOrigTemplate
A pointer to the dialog template to be used in creating the dialog box.

Return Value

A pointer to a dialog template structure used to create the dialog box.

Remarks

The default behavior makes a call to SplitDialogTemplate, determining if there are any ActiveX controls present and then returns the resultant dialog template.

Override this function to customize the process of creating a dialog box hosting ActiveX controls.

COccManager::PostCreateDialog

Called by the framework to free memory allocated for the dialog template.

virtual void PostCreateDialog(_AFX_OCC_DIALOG_INFO* pOccDialogInfo);

Parameters

pOccDialogInfo
An _AFX_OCC_DIALOG_INFO structure containing information on the dialog template and any ActiveX controls hosted by the dialog.

Remarks

This memory was allocated by a call to SplitDialogTemplate, and was used for any hosted ActiveX controls in the dialog box.

Override this function to customize the process of cleaning up any resources used by the dialog box object.

COccManager::SetDefaultButton

Call this function to set the control as the default button.

static void AFX_CDECL SetDefaultButton(
    CWnd* pWnd,
    BOOL bDefault);

Parameters

pWnd
A pointer to the window containing the control.

bDefault
Nonzero if the control should become the default button; otherwise zero.

Return Value

Nonzero if successful; otherwise zero.

Remarks

COccManager::SplitDialogTemplate

Called by the framework to split the ActiveX controls from common dialog controls.

virtual DLGTEMPLATE* SplitDialogTemplate(
    const DLGTEMPLATE* pTemplate,
    DLGITEMTEMPLATE** ppOleDlgItems);

Parameters

pTemplate
A pointer to the dialog template to be examined.

ppOleDlgItems
A list of pointers to dialog box items that are ActiveX controls.

Return Value

A pointer to a dialog template structure containing only non-ActiveX controls. If no ActiveX controls are present, NULL is returned.

Remarks

If any ActiveX controls are found, the template is analyzed and a new template, containing only non-ActiveX controls, is created. Any ActiveX controls found during this process are added to ppOleDlgItems.

If there are no ActiveX controls in the template, NULL is returned .

Override this function to customize this process.

See also

Hierarchy Chart
COleControlSite Class
COleControlContainer Class