button.cpp

一个更为先进的嵌入式操作系统.采用RMS线程调度算法,具有信号量等同步对象.亦包括GUI. 通过该系统您可以极大知道Windows的内部秘密.

#include "gos.h"
#include "button.h"

LRESULT CButton::MsgProc(UINT message, WPARAM wParam, LPARAM lParam)
{
	switch(message)
	{
	case WM_PAINT:
		OnPaint(PDC(wParam));
		break;
	case WM_LBUTTONDOWN:
		AddStyle(BS_PUSHED);
		Invalidate(NULL);
		break;
	case WM_LBUTTONUP:
		RemoveStyle(BS_PUSHED);
		Invalidate(NULL);
		if(!GetWindowRect().PtInRect(CPoint(lParam)))
			break;
		switch(GetStyle() & BS_TYPEMASK)
		{
		case BS_CHECKBOX:
			SetCheck(-1);
			break;
		case BS_RADIOBUTTON:
			SetCheck(1);
			break;
		}
		PostMessage(WM_COMMAND,BN_CLICKED,0);
		break;
	case WM_SETFOCUS:
	case WM_KILLFOCUS:
		Invalidate(NULL);
		break;
	case WM_COMMAND:
		GetParent()->PostMessage(message,WPARAM(this),wParam);
		break;
	default:
		wParam=CWnd::MsgProc(message,wParam,lParam);
	}
	return wParam;
}

void CButton::OnEraseBkgnd(CDC* pDC)
{
	switch(GetStyle() & BS_TYPEMASK)
	{
	case BS_CHECKBOX:
		SetCheck(-1);
		break;
	case BS_RADIOBUTTON:
		SetCheck(1);
		break;
	}
	CWnd::OnEraseBkgnd(pDC);
}

void CButton::OnPaint(CDC* pDC)
{
	DWORD nStyle=GetStyle();
	LPCRECT pRect=GetClientRect();
	switch(nStyle & BS_TYPEMASK)
	{
	case BS_PUSHBUTTON:
		if(nStyle & BS_BITMAP)
			DrawBitmap(pDC,pRect,GetBitmap(),nStyle);
		else if(nStyle & BS_LINKLIKE)
			DrawLinkButton(pDC,pRect);
		else
			DrawButton(pDC,GetClientRect());
		break;
	case BS_CHECKBOX:
	case BS_RADIOBUTTON:
		if(nStyle & BS_BITMAP)
			DrawBitmap(pDC,pRect,GetBitmap(),nStyle);
		else if(nStyle & BS_PUSHLIKE)
			DrawButton(pDC,pRect);
		else
			DrawCheckBox(pDC,pRect);
		break;
	case BS_OWNERDRAW:
		GetParent()->MsgProc(WM_DRAWITEM,WPARAM(this),LPARAM(pDC));
		break;
	}
}

void CButton::DrawBitmap(CDC* pDC,LPCRECT pRect,CBitmap* pBitmap,DWORD nStyle)
{
	if(!pBitmap || !pBitmap->GetBitmap().bmBits)
		return;

	if(nStyle & (BS_CHECKED|WS_FOCUSED))
	{
		COLORREF clr=GetCtlColor(COLOR_HIGHLIGHT)|(128<<24);
		clr=pDC->SetTextColor(clr);
		pDC->BitBlt(pRect,pBitmap,NULL,(nStyle&BS_STYLEMASK)|R2_ALPHABLENDPEN);
		pDC->SetTextColor(clr);
	}
	else
		pDC->BitBlt(pRect,pBitmap,NULL,nStyle&BS_STYLEMASK);
}

void CButton::DrawButton(CDC* pDC,LPCRECT pRect)
{
	DWORD nStyle=GetStyle();
	CFont* pFont=pDC->SelectObject(GetFont());;
	COLORREF clr0,clr=GetCtlColor(COLOR_WINDOWTEXT);
	CRect r(pRect);

	pDC->DrawRect(r,clr,PS_SOLID);
	r.DeflateRect(1);
	if(nStyle & WS_FOCUSED)
		pDC->DrawRect(r,clr,PS_SOLID);
	if(nStyle&BS_PUSHED)
		r.OffsetRect(1,1);
	clr0=pDC->SetBkColor(CLR_NONE);
	clr=pDC->SetTextColor(clr);
	nStyle &= BS_DTMASK;
	pDC->DrawText(this,r,nStyle);
	pDC->SetTextColor(clr);
	pDC->SetBkColor(clr0);
	pDC->SelectObject(pFont);
}

void CButton::DrawCheckBox(CDC* pDC,LPCRECT pRect)
{
	CRect rclText,r(pRect);
	COLORREF clr0,clr;
	CFont* pFont=pDC->SelectObject(GetFont());
	DWORD nStyle=GetStyle();
	SIZE size=pDC->GetTextExtent(" ",1);

	r.top=(r.top+r.bottom-size.cy)>>1;
	r.bottom=r.top+size.cy;
	rclText=r;
	if(nStyle & BS_LEFTTEXT)
	{
		r.left=r.right-(size.cx<<1);
		rclText.right=r.left-3;
	}
	else
	{
		r.right=r.left+(size.cx<<1);
		rclText.left=r.right+3;
	}
	clr=GetCtlColor(COLOR_WINDOWTEXT);
	pDC->DrawRect(r,clr);
	r.DeflateRect(1);

	clr=GetCtlColor(COLOR_WINDOWTEXT);
	if(nStyle & BS_PUSHED)
	{
		clr0=GetCtlColor(COLOR_3DFACE);
		pDC->FillSolidRect(r,clr0);
	}
	else if(nStyle & BS_CHECKED)
	{
		r.DeflateRect(2);
		pDC->FillSolidRect(r,clr);
	}

	clr=pDC->SetTextColor(clr);
	clr0=pDC->SetBkColor(CLR_NONE);
	if(!(nStyle&BS_CENTER))
		nStyle|=(nStyle& BS_LEFTTEXT)?BS_RIGHT:BS_LEFT;
	nStyle &= BS_DTMASK;
	pDC->DrawText(this,rclText,nStyle);

	pDC->SetBkColor(clr0);
	pDC->SetTextColor(clr);
	pDC->SelectObject(pFont);
}

void CButton::DrawLinkButton(CDC* pDC,LPCRECT pRect)
{
	CFont* pFont=pDC->SelectObject(GetFont());
	DWORD nStyle=GetStyle();
	COLORREF clr0,crText;

	crText=GetCtlColor(COLOR_HOTLIGHT);
	crText=pDC->SetTextColor(crText);
	clr0=pDC->SetBkColor(CLR_NONE);
	
	nStyle &= BS_DTMASK;
	pDC->DrawText(this,pRect,nStyle);

	pDC->SetBkColor(clr0);
	pDC->SetTextColor(crText);
	pDC->SelectObject(pFont);
}

void CButton::SetCheck(BOOL bCheck)
{
	DWORD nStyle=GetStyle();
	switch(nStyle & BS_TYPEMASK)
	{
	case BS_RADIOBUTTON:
	{
		if(!(nStyle & BS_CHECKED))
		{
			PWND pWnd,pChild=GetParent()->GetChild()->GetPrevWindow();
			for(pWnd=GetPrevWindow();pWnd!=pChild;pWnd=pWnd->GetPrevWindow())
			{
				nStyle=pWnd->GetStyle();
				if(nStyle & BS_RADIOBUTTON)
				{
					if(nStyle & BS_CHECKED)
					{
						pWnd->RemoveStyle(BS_CHECKED);
						pWnd->Invalidate(NULL);
						break;
					}
				}
				if(!(nStyle & WS_SUBGROUP))
					break;
			}
			pChild=GetParent()->GetChild();
			for(pWnd=pWnd?GetNextWindow():pChild;pWnd!=pChild;pWnd=pWnd->GetNextWindow())
			{
				nStyle=pWnd->GetStyle();
				if(!(nStyle & WS_SUBGROUP))
					break;
				if(nStyle & BS_RADIOBUTTON)
				{
					if(nStyle & BS_CHECKED)
					{
						pWnd->RemoveStyle(BS_CHECKED);
						pWnd->Invalidate(NULL);
						pWnd=NULL;
						break;
					}
				}
			}
			AddStyle(BS_CHECKED);
			Invalidate(NULL);
		}
	}
	default:
		if(bCheck<0)
			bCheck=(nStyle & BS_CHECKED)?FALSE:TRUE;
		if(bCheck)
			AddStyle(BS_CHECKED);
		else
			RemoveStyle(BS_CHECKED);
	}
}