CoolCalendar a perpetual calendar control

Download Perpetual Calendar Project 44 Kb

Background

During my career I have designed numerous user interfaces and widgets. I have yet to see a calendar that has a perpetual or rolling feature built in. By this I mean to change the month by selecting on the previous or next months days, rather that moving from the calendar interface to the month combobox. Well hopefully this calendar overcomes some of the shortfalls most calendar controls have on the market.

Features

• Spinner control (optional) to scroll 7 days at a time.
• Perpetual or rolling functionality allows user to click on previous and next month.
• Programmatically attach a note to day
• Fulfills UI guidelines
• Date select notification

Interface

COleDateTime GetDate()	Gets the currently selected date
void ShowSpinner(BOOL bShow);	Shows or hides the month spinner
BOOL SetDate(COleDateTime tm);	Sets the current date
BOOL AddNote(COleDateTime& date, CString strNote, BOOL bReplace);	Attaches a note to a date
void DeleteNote(COleDateTime& date);	Deletes a note from a date
void ClearAllNotes();	Removes all notes

Implemention

Files:

• CalWnd.h & CalWnd.cpp (Main calendar functionality)
• CalBtn.h & CalBtn.cpp (Calendar button objects)
• Popup.h & Popup.cpp (Popup Context menu)
• NoEdit.h & NoEdit.cpp (Disabled edit box)

In your windows header file that's going host the control, include "calwnd.h"

// Include calendar and dependency files

#include "CalWnd.h"

Now make a CCalWnd object a member of your hosting window class

class CMyWnd
{
public:
... Some other stuff
protected:
    CCalWnd	m_wndCalendar;  

Now create the calendar window, usually done when the hosting window is created.

int CChildView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{	
	// Call base class implementation of OnCreate first

	if (CWnd ::OnCreate(lpCreateStruct) == -1)
		return -1;
	

	// Now create our calendar control

	// This creates the window at the left, top position.

	// The calendar automatically sizes...

	if (m_wndCalendar.Create(NULL,"Calendar",
	                         WS_VISIBLE|WS_CHILD,
	                         CRect(20,20,0,0),this,0x0101) == -1)
		return -1;
	... Some other code

Now we need to implement a handler for the date change notification. (When the user clicks on a date). This is inserted your hosting windows .cpp file. Put this outside of the AFX_MSG_MAP comments.

BEGIN_MESSAGE_MAP(CChildView,CWnd )
	//{{AFX_MSG_MAP(CChildView)

	ON_WM_PAINT()
	ON_WM_CREATE()
	ON_WM_LBUTTONDBLCLK()
	//}}AFX_MSG_MAP

	ON_MESSAGE(WM_DATE_NOTIFY,OnDateNotify) // <--- HERE

END_MESSAGE_MAP()

This is inserted your hosting windows .h file. Put this outside of the AFX_MSG_MAP comments.

//{{AFX_MSG(CChildView)

	afx_msg void OnPaint();
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
	afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
	//}}AFX_MSG

	afx_msg LRESULT OnDateNotify(WPARAM wParam, LPARAM nId); // <--- HERE

	DECLARE_MESSAGE_MAP()

On finally the handler itself.

LRESULT CChildView::OnDateNotify(WPARAM wParam, LPARAM nControlId)
{
	COleDateTime tm = m_wndCalendar.GetDate();

	TRACE("Date Selected %s for Control ID %d\n",tm.Format("%c"), nControlId);
	return 0;
}

See the example for further use of the calendar. Please contact me if you find bugs, or you would like to see further functionality.

Happy coding... :)