colorpane.cpp

windows核心编程,详细讲述WINDOWS编程原理

// ColorPane.cpp : implementation file
//

#include "stdafx.h"
#include "Mainfrm.h"
#include "Ll.h"
#include "ColorPane.h"

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

/////////////////////////////////////////////////////////////////////////////
// CColorPane
const UINT ID_COLOR_DIALOG = ::RegisterWindowMessage("ID_COLOR_DIALOG");

CColorPane::CColorPane()
{
	m_nColorPicked = -1;
	m_clrCurrentColor = 0;
}

CColorPane::~CColorPane()
{
}


BEGIN_MESSAGE_MAP(CColorPane, CToolBar)
	//{{AFX_MSG_MAP(CColorPane)
	ON_WM_PAINT()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_LBUTTONDBLCLK()
	//}}AFX_MSG_MAP
	ON_COMMAND(ID_COLOR_DIALOG,OnColorDialog)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CColorPane message handlers

COLORREF CColorPane::s_clrMosaic[28] = { 
		RGB(0, 0, 0), RGB(255, 255, 255), RGB(128, 128, 128), RGB(192, 192, 192),
		RGB(128, 0, 0), RGB(255, 0, 0), RGB(128, 128, 64), RGB(255, 255, 0),
		RGB(0, 128, 0), RGB(128, 255, 0), RGB(0, 128, 128), RGB(0, 255, 255),
		RGB(0, 0, 128), RGB(0, 0, 255), RGB(128, 0, 128), RGB(255, 0, 255),
		RGB(128, 128, 0), RGB(255, 255, 128), RGB(0, 64, 64), RGB(128, 255, 128),
		RGB(0, 128, 255), RGB(128, 255, 255), RGB(0, 64, 128), RGB(128, 128, 255),
		RGB(0, 0, 255), RGB(255, 0, 128), RGB(128, 64, 64), RGB(255, 128, 64)		
	};

void CColorPane::InitColorBox(CRect& rc)
{
	int nHorzGap = 17;
	int nVertGap = 17;
	int nWidth = 15;
	int nHeight = 15;

	for(int i=0; i<14; i++)
	{
		m_rcColorBox[2*i].left = rc.left+42+i*nHorzGap;		
		m_rcColorBox[2*i].right = m_rcColorBox[2*i].left+nWidth;
		m_rcColorBox[2*i].top  = rc.top+5;			
		m_rcColorBox[2*i].bottom = m_rcColorBox[2*i].top+nHeight;

		m_rcColorBox[2*i+1].left = m_rcColorBox[2*i].left;	
		m_rcColorBox[2*i+1].right = m_rcColorBox[2*i+1].left+nWidth;
		m_rcColorBox[2*i+1].top  = m_rcColorBox[2*i].top+nVertGap;			
		m_rcColorBox[2*i+1].bottom = m_rcColorBox[2*i+1].top+nHeight;
	}
}

int CColorPane::PtInColorBox(POINT point)
{
	for ( int i=0; i < 28; i++ )
		if ( m_rcColorBox[i].PtInRect(point) )  break;

	if ( i < 28 )	return i;
	else			return -1;
}

void CColorPane::DrawBigColorBox(CDC& dc, CRect& rc)
{
	// Draw a big rectangle showing on left to display the color selected.
	CRect rcBox(rc.left+5,rc.top+5,rc.left+38,rc.top+38);

	dc.Draw3dRect(rcBox.left, rcBox.top, rcBox.Width(), rcBox.Height(), RGB(0, 0, 0), RGB(255, 255, 255));

	int nBoxWidth = 16;
	int nBoxHeight = 16;
	int nBackOffset = 12;
	int nFrontOffset = 5;
	CRect rcBack(rcBox.left+nBackOffset, rcBox.top+nBackOffset, rcBox.left+nBackOffset+nBoxWidth, rcBox.top+nBackOffset+nBoxHeight);
	dc.Draw3dRect(rcBack.left, rcBack.top, rcBack.Width(), rcBack.Height(),
		 RGB(255, 255, 255), RGB(0, 0, 0));
	
	{// Draw canvas color box.
		CPen pen(PS_SOLID, 1, GetCanvasColor());
		CBrush br(GetCanvasColor());
		CPen* pOldPen = dc.SelectObject(&pen);
		CBrush* pOldBrush = dc.SelectObject(&br);

		dc.Rectangle(rcBack.left+1, rcBack.top+1, rcBack.right-2, rcBack.bottom-2);

		dc.SelectObject(pOldPen);
		dc.SelectObject(pOldBrush);
	}

	CRect rcFront(rcBox.left+nFrontOffset, rcBox.top+nFrontOffset, rcBox.left+nFrontOffset+nBoxWidth, rcBox.top+nFrontOffset+nBoxHeight);
	dc.Draw3dRect(rcFront.left, rcFront.top, rcFront.Width(), rcFront.Height(),
		 RGB(255, 255, 255), RGB(0, 0, 0));

	{ // Draw paint color box in front.
		CPen pen(PS_SOLID, 1, RGB(208,195,186)); // pen's color is same as background.
		CBrush br(GetColor());
		CPen* pOldPen = dc.SelectObject(&pen);
		CBrush* pOldBrush = dc.SelectObject(&br);

		dc.Rectangle(rcFront.left, rcFront.top, rcFront.right-1, rcFront.bottom-1);

		dc.SelectObject(pOldPen);
		dc.SelectObject(pOldBrush);
	}
}

void CColorPane::DrawASmallColorBox(CDC& dc, CRect& rc, COLORREF color)
{
	dc.Draw3dRect(rc.left, rc.top, rc.Width(), rc.Height(), RGB(0, 0, 0), RGB(255, 255, 255));
	CPen pen(PS_SOLID, 1, color);
	CBrush brush(color);
	CPen* pOldPen = dc.SelectObject(&pen);
	CBrush* pOldBrush = dc.SelectObject(&brush);

	dc.Rectangle(rc.left+1, rc.top+1, rc.left+rc.Width()-1,rc.top+rc.Height()-1);

	dc.SelectObject(pOldPen);
	dc.SelectObject(pOldBrush);
}

void CColorPane::DrawSmallColorBoxes(CDC& dc, CRect& rc)
{
	// draw each small color boxes.
	for(int i=0; i < 28; i++)
	{
		DrawASmallColorBox(dc,m_rcColorBox[i],s_clrMosaic[i]);
	}
}

void CColorPane::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	CRect rc;
	GetClientRect(&rc);

	static BOOL bFirst=TRUE;
	if ( bFirst ) // initialize once only.
		InitColorBox(rc);
	else		
		bFirst = FALSE;

	DrawBigColorBox(dc, rc);

	DrawSmallColorBoxes(dc, rc);
	
	// Do not call CToolBarCtrl::OnPaint() for painting messages
}

COLORREF CColorPane::GetColor() const
{
	// default color is black.
	if( m_nColorPicked < -1 || m_nColorPicked > 27 )
		return m_clrCurrentColor;
	else if ( m_nColorPicked == -1 )
		return s_clrMosaic[0];
	else
		return s_clrMosaic[m_nColorPicked]; 
}

COLORREF CColorPane::GetPaintColor() const
{
	CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd();
	if ( pFrame )
		return pFrame->m_clrPaint;
	else
		return RGB(0,0,0);
}

void CColorPane::SetPaintColor(COLORREF color)
{
	CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd();
	if ( pFrame )
		pFrame->m_clrPaint = color;
}

COLORREF CColorPane::GetCanvasColor() const
{
	CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd();
	if ( pFrame )
		return pFrame->m_clrCanvas;
	else
		return RGB(255,255,255);
}

void CColorPane::SetCanvasColor(COLORREF color)
{
CMainFrame* pFrame = (CMainFrame*)AfxGetMainWnd();
	if ( pFrame )
		pFrame->m_clrCanvas = color;
}

void CColorPane::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	CToolBar::OnMouseMove(nFlags, point);
}

void CColorPane::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	CToolBar::OnLButtonDown(nFlags, point);
}

void CColorPane::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	int nBoxIndex = PtInColorBox(point);
	if ( nBoxIndex > -1 )
	{
		m_nColorPicked = nBoxIndex;
		SetPaintColor(s_clrMosaic[m_nColorPicked]);
		Invalidate();
	}

	CToolBar::OnLButtonUp(nFlags, point);
}

void CColorPane::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	int nBoxIndex = PtInColorBox(point);
	if ( nBoxIndex > -1 )
	{
		m_nColorPicked = nBoxIndex;
		// it can't run dialog function in mouse procedure.
		PostMessage(WM_COMMAND, ID_COLOR_DIALOG);
	}

	CToolBar::OnLButtonDblClk(nFlags, point);
}

void CColorPane::OnColorDialog()
{
	CColorDialog dlg(GetColor(),0,NULL);
	if ( dlg.DoModal() == IDOK )
	{
		s_clrMosaic[m_nColorPicked] = dlg.GetColor();
		SetPaintColor(s_clrMosaic[m_nColorPicked]);

		Invalidate();
	}
}