wtlscribbleview.h

Visual_C++[1].NET_Bible1 Visual_C++宝典书中的全部源码

// WTLScribbleView.h : interface of the CWTLScribbleView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_HELLOWTLVIEW_H__094B5DE2_A908_11D4_81E1_006008438F29__INCLUDED_)
#define AFX_HELLOWTLVIEW_H__094B5DE2_A908_11D4_81E1_006008438F29__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#include "atlmisc.h"
#include "atlcrack.h"
#include "atlgdi.h"

class CWTLScribbleView : public CWindowImpl<CWTLScribbleView>
{
public:
	DECLARE_WND_CLASS(NULL)

	BOOL PreTranslateMessage(MSG* pMsg)
	{
		pMsg;
		return FALSE;
	}

	CPoint m_startPoint;
	CPoint m_endPoint;

	CWTLScribbleView() 
	{
		m_startPoint.x = m_startPoint.y = -1;
		m_endPoint.x = m_endPoint.y = -1;
		m_color = RGB(255,0,0);
	}

	BEGIN_MSG_MAP_EX(CWTLScribbleView)
		MSG_WM_LBUTTONDOWN(OnLButtonDown)
		MSG_WM_LBUTTONUP(OnLButtonUp)
		MSG_WM_MOUSEMOVE(OnMouseMove)
		COMMAND_ID_HANDLER_EX(ID_COLOR_RED, OnColorRed)
		COMMAND_ID_HANDLER_EX(ID_COLOR_GREEN, OnColorGreen)
		COMMAND_ID_HANDLER_EX(ID_COLOR_BLUE, OnColorBlue)
	END_MSG_MAP()

	LRESULT OnLButtonDown (UINT flags, CPoint point)
	{
		m_startPoint = point;
		return 0;
	}

	LRESULT OnLButtonUp (UINT flags, CPoint point)
	{
		m_startPoint.x = m_startPoint.y = -1;
		return 0;
	}

	LRESULT OnMouseMove (UINT flags, CPoint point)
	{
		m_endPoint = point;
		
		CClientDC dc(this->m_hWnd);
		CPen np;
		np.CreatePen(PS_SOLID, 2, m_color);
		HPEN op = dc.SelectPen(np.m_hPen);

		if (m_startPoint.x != -1 )
		{
			dc.MoveTo(m_startPoint.x, m_startPoint.y, NULL);
			dc.LineTo(m_endPoint.x, m_endPoint.y);
			m_startPoint.x = m_endPoint.x;
			m_startPoint.y = m_endPoint.y;
		}

		dc.SelectPen(op);
		return 0;
	}

	LRESULT OnColorRed(UINT, int, HWND)
	{
		m_color = RGB(255,0,0);
		return 0;
	}
	LRESULT OnColorGreen(UINT, int, HWND)
	{
		m_color = RGB(0,255,0);
		return 0;
	}
	LRESULT OnColorBlue(UINT, int, HWND)
	{
		m_color = RGB(0,0,255);
		return 0;
	}

protected:
	COLORREF m_color;
};


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

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_HELLOWTLVIEW_H__094B5DE2_A908_11D4_81E1_006008438F29__INCLUDED_)