formctrl.h

Visual C++ 实践与提高COM和COM+篇源代码. 对学习COM编程很有帮助.

/*****************************************************************************
  File: FormControl.h

  Purpose:
     Define the CFormControl class from which the Form OLE Controls can be
	 derived. The primary purpose of this class is to create the controls
	 window using CWnd::CreateDlg. Also provided is a default design time
	 representation of the control, a means of forcing the control to the 
	 size of the dialog template, and code to handle mouse and keyboard
	 processing.

  Includes:
     #include "Wnd2.h"
     #include "BaseCtrl.h"

  Variables:
     m_lpszTemplateName  - Dialog template resource name.
     m_cTemplateSize     - Dialog template size in pixels.
     m_bAutoSize         - Use the template size to fix the size of the control.
     m_hWndCurrentChild  - Holder for the current child window.
     m_sFormName         - String dispayed at design time.
     m_pOccDialogInfo    - Copied from CFormView

  Functions:
     CFormControl        - Initialize member variables and calculate the dialog
	                       template size.
     OnSetExtent         - Sets the size of the control.
     OnInitialUpdate     - Handles the child control initialization.
     OnDraw              - Provides a border at design time.
     PreTranslateMessage - If m_hWnd is valid, allows IsDialogMessage to 
	                       to try and handle the message.
     OnActivateControl   - Handler to be executed when a child window gets the
	                       focus.
     OnSetFocus          - Handles the case when tabbing into the OLE Form Control.
     CreateControlWindow - Creates m_hWnd using CWnd::CreateDlg

     SetOccDialogInfo    - Copied from CFormView.
     HandleInitDialog    - Copied from CFormView

     GetClassID          - Had to override COleControl pure virtual function.
     GetUserTypeNameID   - Had to override COleControl pure virtual function.
     GetMiscStatus       - Had to override COleControl pure virtual function.
     
     OnMouseActivate     - To make the OLE control layer transparent mouse 
     OnMouseMove         - messages should come through the child controls. 
     OnLButtonDblClk     - These functions have empty implementations so as 
     OnLButtonDown       - to turn off the default mouse message processing 
     OnLButtonUp         - of an OLE control.
     OnMButtonDblClk     - See Above.
     OnMButtonDown       - See Above.
     OnMButtonUp         - See Above.
     OnRButtonDblClk     - See Above.
     OnRButtonDown       - See Above.
     OnRButtonUp         - See Above.

  Other:
     _AfxCheckDialogTemplate - Global helper function copied from CFormView.

  Development Team: ShawnK

  Written by Microsoft Product Support Services, Languages Developer Support
  Copyright (c) 1993 Microsoft Corporation. All rights reserved.
\****************************************************************************/

#ifndef FORMCONTROL_H
#define FORMCONTROL_H

/////////////////////////////////////////////////////////////////////////////
// CFormControl window
#include "Wnd2.h"

class CFormControl : public COleControl
{
	DECLARE_DYNCREATE(CFormControl)

	CFormControl () {};

// Construction
public:
	CFormControl(LPCTSTR lpszTemplateName, BOOL bAutoSize = TRUE);
	CFormControl(UINT nIDTemplate, BOOL bAutoSize = TRUE);
	virtual ~CFormControl();
	virtual BOOL OnSetExtent(LPSIZEL lpSizeL);
	virtual void OnInitialUpdate();
	virtual DWORD GetControlFlags();

// Attributes
protected:
	LPCTSTR		m_lpszTemplateName;		// Template resource name.
	CSize		m_cTemplateSize;		// Template size in pixels.
	BOOL		m_bAutoSize;			// Auto size the control by Template size.
	HWND		m_hWndCurrentChild;		// Holder for the current child window.
	CString		m_sFormName;			// String dispayed at design time.

// Operations
public:
	// Drawing function
	virtual void OnDraw(
				CDC* pdc, const CRect& rcBounds, const CRect& rcInvalid);

	// Handle Tab Key (etc.) processing.
	virtual BOOL PreTranslateMessage(MSG* pMsg);
	afx_msg LONG OnActivateControl( UINT, LONG );

protected:
	virtual BOOL CreateControlWindow(HWND hWndParent, const CRect& rcPos,
									 LPCRECT prcClipped = NULL);

	void GetFormName();
	BOOL GetExtendedProp (LPWSTR strPropName, LPDISPATCH& lpDisp, VARIANT& va);

#ifndef _AFX_NO_OCC_SUPPORT
	// data and functions necessary for OLE control containment
	_AFX_OCC_DIALOG_INFO* m_pOccDialogInfo;
	virtual BOOL SetOccDialogInfo(_AFX_OCC_DIALOG_INFO* pOccDialogInfo);
	afx_msg LRESULT HandleInitDialog(WPARAM, LPARAM);
#endif

// Abstract functions in COleControl.
	// Class ID (implemented by IMPLEMENT_OLECREATE_EX macro)
	virtual HRESULT GetClassID(LPCLSID pclsid) {return 0;};
	virtual UINT GetUserTypeNameID() {return 0;};
	virtual DWORD GetMiscStatus() {return 0;};

	// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CFormControl)
	//}}AFX_VIRTUAL

	// Generated message map functions
protected:
	//{{AFX_MSG(CFormControl)
	afx_msg void OnSetFocus(CWnd* pOldWnd);
	afx_msg int OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT message);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	afx_msg void OnMButtonDblClk(UINT nFlags, CPoint point);
	afx_msg void OnMButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnMButtonUp(UINT nFlags, CPoint point);
	afx_msg void OnRButtonDblClk(UINT nFlags, CPoint point);
	afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnRButtonUp(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

BOOL AFXAPI _AfxCheckDialogTemplate(LPCTSTR lpszResource, BOOL bInvisibleChild);

#endif //FORMCONTROL_H