chatricheditctrl.cpp

一款战旗类的打飞机游戏源码

/*
Copyright (c)  2005  william.
      Permission is granted to copy, distribute and/or modify this document
      under the terms of the GNU Free Documentation License, Version 1.2
      or any later version published by the Free Software Foundation;
      with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
	 Texts.  A copy of the license is included in the section entitled "GNU
      Free Documentation License".
*/

#include "stdafx.h"

// CChatRichEditCtrl

IMPLEMENT_DYNAMIC(CChatRichEditCtrl, CRichEditCtrl)
CChatRichEditCtrl::CChatRichEditCtrl()
{
	memset(&cf,0,sizeof(cf));
	cf.dwMask = CFM_COLOR|CFM_BOLD|CFM_SIZE|CFM_FACE;
	wcscpy(cf.szFaceName,L"宋体");
	cf.yHeight = 173;
	//I don't knwon how to get the edit wndow height in programme
	//the number 59 is directly get from .rc file.
	//and, I don't sure if the length-units matching
	//if you known,please awake me.
	UINT windHeightPixel = 59;
	HDC DC =::GetWindowDC(0);
	float yPixelsPerInch  =(float)::GetDeviceCaps(DC,LOGPIXELSY);
	::ReleaseDC(0,DC);

	//1440 twips per inch
	float fontHeightPixel = yPixelsPerInch*172/1440;
	WinChatLine = (UINT)(windHeightPixel/fontHeightPixel);

   //actually the line of chat-text-window is 1 more line then 
	//WinChatLine, but it's can't work well when the text is full line.

	//++WinChatLine;
}

CChatRichEditCtrl::~CChatRichEditCtrl()
{
}
BEGIN_MESSAGE_MAP(CChatRichEditCtrl, CRichEditCtrl)
	ON_WM_VSCROLL()
	ON_WM_MOUSEWHEEL()
END_MESSAGE_MAP()



void CChatRichEditCtrl::ShowText(int BeginLine,int EndLine)
{
	if(BeginLine<0)BeginLine=0;
	if(EndLine<0)EndLine=0;
	else if(EndLine>ChatArray.GetCount())EndLine = (int)ChatArray.GetCount();
	if(BeginLine>EndLine)BeginLine=EndLine;

	DUMP2(L"display:",BeginLine,EndLine-1);

	CString t;
	SetDefaultCharFormat(cf);

	for(int i = BeginLine;i<EndLine;i++)
	{
		t.Append(ChatArray.GetAt(i));
	}
   SetWindowText(t);

	//keep the format for each line;
	long from=0;

	for(int i = BeginLine;i<EndLine;i++)
	{
		long to = ChatArray.GetAt(i).GetLength();
		SetSel(from,to+from);
		DUMP2(L"effect from to",from,to+from);
		cf.dwEffects = EffectArray.GetAt(i).Effects;
		cf.crTextColor = EffectArray.GetAt(i).TextColor;
		SetSelectionCharFormat(cf);
		from+=to;
	}
	SetSel(0,0);
	UpdateWindow();
	//do update now
	Sleep(0);
}

void CChatRichEditCtrl::AppendText(const CString& str,COLORREF cr,bool bold)
{
	ChatArray.Add(str);
   EffectArray.Add(CPair(bold,cr));

	UINT OldBeginLine = GetScrollPos(SB_VERT);

	int max = (int)ChatArray.GetCount();
	ASSERT(max>0);
#ifdef _DEBUG
	if(max>20)MowArray(),--max;
#else
	if(max>200)MowArray(),--max;
#endif
	max = max - WinChatLine;
	max = max<0?0:max;
	DUMP1(L"range:",max);
	SetScrollRange(SB_VERT,0,max);

	//if scrollbar on the very bottom,auto scroll it;
	//otherwise keep it,so reader can keep reading the history and 
	//not be disrupted by auto scroll
	if((int)OldBeginLine == max-1)
	{
		//Auto scroll
		SetScrollPos(SB_VERT,OldBeginLine+1);
   	ShowText(OldBeginLine+1);
#ifdef _DEBUG
		UINT tNowPos =  GetScrollPos(SB_VERT);
		UINT tEndLine = GetEndLine(tNowPos);
		ASSERT((UINT)max == tEndLine-WinChatLine);
#endif
	}
	else
	{
		SetScrollPos(SB_VERT,OldBeginLine);
   	ShowText(OldBeginLine);
	}
}

// CChatRichEditCtrl 消息处理程序


void CChatRichEditCtrl::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* )
{
	UINT pos = GetScrollPos(SB_VERT);
	int newPos=0;
	switch(nSBCode)
	{
	case SB_THUMBTRACK:
	case SB_THUMBPOSITION : newPos=nPos;break;
	case SB_LINEDOWN :newPos=pos+1;break;
	case SB_LINEUP :newPos=pos-1;break;
	case SB_PAGEDOWN :newPos=pos+5;break;
	case SB_PAGEUP :newPos=pos-5;break;
	default:newPos=pos;break;
	}

	if(IsOutOfRange(newPos+WinChatLine))return;

   SetScrollPos(SB_VERT,newPos);
	DUMP1(L"pos move to:",newPos);

	CPoint cur(GetCaretPos());
	ShowText(newPos);
	SetCaretPos(cur);

}

BOOL CChatRichEditCtrl::OnMouseWheel(UINT , short zDelta, CPoint)
{

	int pos = GetScrollPos(SB_VERT);
	pos = pos-(zDelta/WHEEL_DELTA);
	if(pos<0)return true;
   
	OnVScroll(SB_THUMBTRACK,pos,0);

	return true;
	//return CRichEditCtrl::OnMouseWheel(nFlags, zDelta, pt);
}