base

application/sp-console3/Common/ShellTree/WaitingTreeCtrl.h

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+// WaitingTreeCtrl.h : header file
+//
+/////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2000-2001 by Paolo Messina
+// (http://www.geocities.com/ppescher - ppescher@yahoo.com)
+//
+// The contents of this file are subject to the Artistic License (the "License").
+// You may not use this file except in compliance with the License. 
+// You may obtain a copy of the License at:
+// http://www.opensource.org/licenses/artistic-license.html
+//
+// If you find this code useful, credits would be nice!
+//
+/////////////////////////////////////////////////////////////////////////////
+
+#if !defined(AFX_WAITINGTREECTRL_H__80CBE29B_F1A6_41D5_9DF3_B725E73BCF0F__INCLUDED_)
+#define AFX_WAITINGTREECTRL_H__80CBE29B_F1A6_41D5_9DF3_B725E73BCF0F__INCLUDED_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif // _MSC_VER > 1000
+
+/////////////////////////////////////////////////////////////////////////////
+// CWaitingTreeCtrl window
+
+class CWaitingTreeCtrl : public CTreeCtrl
+{
+private:
+	void DestroySnapshot();
+	void DrawSnapshot(CDC* pDC);
+	void TakeSnapshot();
+	HANDLE m_hThread;				// secondary thread for animations
+	HANDLE m_hTimerEvent;			// signaled at each timer period
+	HANDLE m_hRedrawEvent;			// signaled at each population update
+	volatile BOOL m_bAbortAnimation;	// request to terminate secondary thread
+	BOOL m_bDrawSnapshot;			// whether to draw background during populating
+	CBitmap m_bmpSnapshot;			// snapshot bitmap
+	UINT m_nTimerID;				// animation timer id
+	UINT m_nTimerDelay;				// animation timer period (ms)
+	CString m_sWaitMsg;				// text for the wait message
+	HICON m_hIconMsg;				// icon for the wait message
+	BOOL m_bShowWaitMsg;			// wether to show the wait message
+	int m_iItemIndex;				// population progress index
+	int m_iItemCount;				// population progress max index
+	HTREEITEM m_hItemMsg;			// wait message item
+	HTREEITEM m_hItemToPopulate;	// item being populated
+
+	// secondary thread entry point
+	static DWORD WINAPI AnimationThreadProc(LPVOID pThis);
+	
+	void StartAnimation();		// set up animation thread
+	void StopAnimation();		// animation clean up
+	
+	void PreExpandItem(HTREEITEM hItem);	// before expanding
+	void ExpandItem(HTREEITEM hItem);		// after expanded
+
+	BOOL NeedsChildren(HTREEITEM hParent);	// true if no child items
+	void DeleteChildren(HTREEITEM hParent);
+
+	void DrawUserIcon();	// draw wait message icon
+
+// Construction
+public:
+	CWaitingTreeCtrl();
+	virtual ~CWaitingTreeCtrl();
+
+// Attributes
+public:
+
+// Operations
+public:
+
+// Overrides
+	// ClassWizard generated virtual function overrides
+	//{{AFX_VIRTUAL(CWaitingTreeCtrl)
+	public:
+	//}}AFX_VIRTUAL
+
+// Implementation
+public:
+	void RefreshSubItems(HTREEITEM hParent);
+	void SetWaitMessage(LPCTSTR pszText, HICON hIcon = NULL);
+	void ShowWaitMessage()
+	{
+		m_bShowWaitMsg = TRUE;
+	};
+
+protected:
+	// animation functions (with timer)
+	void SetAnimationDelay(UINT nMilliseconds);
+
+	// animation functions (with or without timer)
+	virtual void PreAnimation(HTREEITEM hItemMsg);
+	virtual void DoAnimation(BOOL bTimerEvent, int iMaxSteps, int iStep);
+	virtual void PostAnimation();
+	BOOL GetItemImageRect(HTREEITEM hItem, LPRECT pRect);
+
+	// tree content functions
+	void PopulateRoot();
+	virtual BOOL WantsRefresh(HTREEITEM hItem);
+	virtual BOOL PopulateItem(HTREEITEM hParent) = 0;	// must be implemented
+
+	// tree content functions (for animations without timer)
+	int GetPopulationCount(int *piMaxSubItems = NULL);
+	void SetPopulationCount(int iMaxSubItems, int iFirstSubItem = 0);
+	void IncreasePopulation(int iSubItemsToAdd = 1);
+	void UpdatePopulation(int iSubItems);
+
+	// Generated message map functions
+	//{{AFX_MSG(CWaitingTreeCtrl)
+	afx_msg void OnItemExpanding(NMHDR* pNMHDR, LRESULT* pResult);
+	afx_msg void OnItemExpanded(NMHDR* pNMHDR, LRESULT* pResult);
+	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
+	//}}AFX_MSG
+
+	DECLARE_MESSAGE_MAP()
+};
+
+/////////////////////////////////////////////////////////////////////////////
+
+//{{AFX_INSERT_LOCATION}}
+// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
+
+#endif // !defined(AFX_WAITINGTREECTRL_H__80CBE29B_F1A6_41D5_9DF3_B725E73BCF0F__INCLUDED_)