// PopupText.h

#pragma once

/* Popup text window, like a Tool Tip:
If this is a member of a CWnd derived class:
 CTrackPopup PopupText;
call this in OnMouseMove:
 PopupText.SetTipTextAndPos("Hello World", x,y, this);
it starts a timer and when the mouse stops moving for a moment, draws the Popup Text.
and this to finish:
 PopupText.Hide();
*/
class CPopupText : public CWnd {
public:
  CSize Margins; // extra space around text: change if you like
  enum Justify {Left, Right};
  CPopupText();
  virtual ~CPopupText();
  BOOL Create(CPoint pt, CWnd* pParentWnd, UINT nStyle=0, UINT nID=0);
  void Show(UINT msec);
  void Hide();

protected:
  CFont   Font;  // font to use (same as tooltips)
  Justify Style; // style

// CPopupText is intended to be used on the stack, not heap, so don't auto-delete.
  virtual void PostNcDestroy() {/* don't delete this*/}

  virtual BOOL PreCreateWindow(CREATESTRUCT& cs);

  afx_msg void OnPaint();
  afx_msg void OnTimer(UINT nIDEvent);
  afx_msg LRESULT OnSetText(WPARAM wp, LPARAM lp);
  DECLARE_DYNAMIC(CPopupText);
  DECLARE_MESSAGE_MAP();
};

class CTrackPopup : public CPopupText {
	int m_cursor_height;
	int m_xp;
	int m_yp;
public:
	CTrackPopup() : m_xp(0), m_yp(0), m_cursor_height(GetSystemMetrics(SM_CYCURSOR)) {Create(CPoint(0,0),0,0);}
	virtual ~CTrackPopup() {}
	// Set text and position (in client coords of the parent)
	void SetTipTextAndPos(const CString& str, int xp, int yp, CWnd* parent, UINT Delay=0) {
		if(abs(xp - m_xp) < 2 && abs(yp - m_yp) < 2) return;
		m_xp = xp;
		m_yp = yp;
		Hide();	// don't show it while moving
		if(!str.IsEmpty()) { // Position tip window:
			CPoint Point(xp, yp + (m_cursor_height * 2) / 3);
			parent->ClientToScreen(&Point);
			SetWindowPos(NULL, Point.x, Point.y, 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
      SetWindowText(str); // Do this here to adjust the position in case the tip is off-screen.
			Show(Delay); // show pop-up text delayed (milliseconds)
		}
	}
};