colourpicker.cpp

实现彩色进度条

// ColourPicker.cpp : implementation file
//

#include "stdafx.h"
#include "CProgressCtrl.h"

#include "ColourPicker.h"
//#include "math.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CColourPicker
IMPLEMENT_DYNCREATE(CColourPicker,CButton)

CColourPicker::CColourPicker()
{
	SetBkColour(GetSysColor(COLOR_3DFACE));
	SetTextColour(GetSysColor(COLOR_BTNTEXT));
	m_bTrackSelection=FALSE;
	m_nSelectionMode=CP_MODE_BK;
	m_bActive=FALSE;
}

CColourPicker::~CColourPicker()
{
}


BEGIN_MESSAGE_MAP(CColourPicker, CButton)
	//{{AFX_MSG_MAP(CColourPicker)
	ON_CONTROL_REFLECT(BN_CLICKED, OnClicked)
	ON_WM_CREATE()
	//}}AFX_MSG_MAP
	ON_MESSAGE(CPN_SELENDOK,	OnSelEndOK)
	ON_MESSAGE(CPN_SELENDCANCEL,OnSelEndCancel)
	ON_MESSAGE(CPN_SELCHANGE,	OnSelChange)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CColourPicker message handlers

void	AFXAPI DDX_ColourPicker(CDataExchange* pDX,int nIDC,COLORREF& crColour)
{
	//得到非编辑控件CColourPicker的窗体句柄
	HWND hWndCtrl=pDX->PrepareCtrl(nIDC);
	ASSERT(hWndCtrl!=NULL);

	//由窗体句柄得到CColourPicker的窗体句柄
	CColourPicker *pColourPicker=(CColourPicker* )CWnd::FromHandle(hWndCtrl);
	//由变量m_bSaveandValideate 的指示状态来保存和获取颜色值
	if(pDX->m_bSaveAndValidate)
	{
		crColour=pColourPicker->GetColour();
	}
	else
	{
		pColourPicker->SetColour(crColour);
	}
}

int CColourPicker::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CButton::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	SetWindowSize();

	return 0;
}

void CColourPicker::OnClicked() 
{
	// TODO: Add your control notification handler code here
	m_bActive=TRUE;
	CRect rect;
	GetWindowRect(rect);
	new CColourPopup(CPoint(rect.left,rect.bottom),GetColour(),this,10,_T("其它颜色…"));

	return ;
}

void CColourPicker::SetBkColour(COLORREF crColourBk)
{
	m_crColourBk=crColourBk;
	if(IsWindow(m_hWnd))
		RedrawWindow();
}

void	CColourPicker::SetTextColour(COLORREF crColourText)
{
	m_crColourText=crColourText;
	if(IsWindow(m_hWnd))
		RedrawWindow();
}

void CColourPicker::SetWindowSize()
{
	//得到边界的宽度
	CSize MarginSize(::GetSystemMetrics(SM_CXEDGE),::GetSystemMetrics(SM_CYEDGE));

	//得到下拉箭头的大小尺寸
	int nArrowWidth=max(::GetSystemMetrics(SM_CXHTHUMB),5*MarginSize.cx);
	int nArrowHeight=max(::GetSystemMetrics(SM_CYVTHUMB),5*MarginSize.cy);
	CSize ArrowSize(max(nArrowWidth,nArrowHeight),max(nArrowWidth,nArrowHeight));
	//得到窗体的大小
	
	CRect rect;
	GetWindowRect(rect);
	CWnd* pParent=GetParent();
	if(pParent)
	//将rect矩形坐标转换为客户区坐标系统
	//即以对话框窗体左上角为坐标参考点(0,0)
		pParent->ScreenToClient(rect);
	//将窗体设置的足够大
	int nWidth=max(rect.Width(),2*ArrowSize.cx+2*MarginSize.cx);
	MoveWindow(rect.left,rect.top,nWidth,ArrowSize.cy+2*MarginSize.cy,TRUE);

	GetWindowRect(rect);
	ScreenToClient(rect);
	//设定下拉箭 头区域的位置
	m_ArrowRect.SetRect(rect.right-ArrowSize.cx-MarginSize.cx,
		rect.top+MarginSize.cy,rect.right-MarginSize.cx,
		rect.bottom-MarginSize.cy);
}

LONG CColourPicker::OnSelChange(UINT lParam,LONG wParam)
{
	if(m_bTrackSelection)
		SetColour((COLORREF) lParam);
	return TRUE;
}

LONG CColourPicker::OnSelEndCancel(UINT lParam,LONG wParam)
{
	m_bActive =FALSE;
	SetColour((COLORREF) lParam);
	CWnd* pParent=GetParent();
	return TRUE;
}
LONG CColourPicker::OnSelEndOK(UINT lParam,LONG wParam)
{
	COLORREF crNewColour=(COLORREF) lParam;
	m_bActive=FALSE;
	SetColour(crNewColour);
	CWnd* pParent=GetParent();
	if(crNewColour!=GetColour())
		if(pParent)	pParent->SendMessage(CPN_SELCHANGE,lParam,(WPARAM)GetDlgCtrlID());
	return TRUE;
}

void CColourPicker::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your code to draw the specified item
	ASSERT(lpDrawItemStruct);

	CDC* pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
	CRect rect	=lpDrawItemStruct->rcItem;
	UINT  state	=lpDrawItemStruct->itemState;
	DWORD dwStyle=GetStyle();

	CSize Margins(::GetSystemMetrics(SM_CXEDGE),::GetSystemMetrics(SM_CYEDGE));
	//绘制下拉箭头
	if(m_bActive)
		state=ODS_SELECTED;
	pDC->DrawFrameControl(&m_ArrowRect,DFC_SCROLL,DFCS_SCROLLDOWN|
		((state&ODS_SELECTED)?DFCS_PUSHED:0)|
		((state&ODS_DISABLED)?DFCS_INACTIVE:0));
	pDC->DrawEdge(rect,EDGE_SUNKEN,BF_RECT);
	rect.DeflateRect(Margins.cx,Margins.cy);
	//除去下拉箭头外的区域并涂上颜色
	rect.right-=m_ArrowRect.Width();
	CBrush brush((state&ODS_DISABLED)?::GetSysColor(COLOR_3DFACE):m_crColourBk);
	CBrush* pOldBrush=(CBrush*)pDC->SelectObject(&brush);
	pDC->SelectStockObject(NULL_PEN);
	pDC->Rectangle(rect);
	pDC->SelectObject(pOldBrush);
	//写窗体文本
	GetWindowText(m_strText);
	if(m_strText.GetLength())
	{
		pDC->SetBkMode(TRANSPARENT);
		if(state&ODS_DISABLED)
		{
			rect.OffsetRect(1,1);
			pDC->SetTextColor(::GetSysColor(COLOR_3DHILIGHT));
			pDC->DrawText(m_strText,rect,DT_CENTER|DT_SINGLELINE|DT_VCENTER);
			rect.OffsetRect(-1,-1);
			pDC->SetTextColor(::GetSysColor(COLOR_3DSHADOW));
			pDC->DrawText(m_strText,rect,DT_CENTER|DT_SINGLELINE|DT_VCENTER);
		}
		else
		{
			pDC->SetTextColor(m_crColourText);
			pDC->DrawText(m_strText,rect,DT_CENTER|DT_SINGLELINE|DT_VCENTER);
		}
	}
	//绘制选中的颜色拾取器
	if(state&ODS_FOCUS)
	{
		rect.DeflateRect(1,1);
		pDC->DrawFocusRect(rect);
	}

}




void CColourPicker::PreSubclassWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
	ModifyStyle(0,BS_OWNERDRAW);

	CButton::PreSubclassWindow();

	SetWindowSize();
}