RoundButton1.cpp
资源名称:高级五子棋.rar [点击查看]
上传用户:sjsmail
上传日期:2009-08-28
资源大小:260k
文件大小:10k
源码类别:
棋牌游戏
开发平台:
Visual C++
- // RoundButton.cpp : implementation file
- //
- // Round Buttons!
- //
- // Written by Chris Maunder (chrismaunder@codeguru.com)
- // Copyright (c) 1997,1998.
- //
- // Modified: 2 Feb 1998 - Fix vis problem, CRgn resource leak,
- // button reposition code redone. CJM.
- //
- // This code may be used in compiled form in any way you desire. This
- // file may be redistributed unmodified by any means PROVIDING it is
- // not sold for profit without the authors written consent, and
- // providing that this notice and the authors name is included. If
- // the source code in this file is used in any commercial application
- // then a simple email would be nice.
- //
- // This file is provided "as is" with no expressed or implied warranty.
- // The author accepts no liability if it causes any damage to your
- // computer, causes your pet cat to fall ill, increases baldness or
- // makes you car start emitting strange noises when you start it up.
- //
- // Expect bugs.
- //
- // Please use and enjoy. Please let me know of any bugs/mods/improvements
- // that you have found/implemented and I will fix/incorporate them into this
- // file.
- //
- /////////////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include "math.h"
- #include "RoundButton1.h"
- #ifdef _DEBUG
- #define new DEBUG_NEW
- #undef THIS_FILE
- static char THIS_FILE[] = __FILE__;
- #endif
- // prototypes
- COLORREF GetColour(double dAngle, COLORREF crBright, COLORREF crDark);
- void DrawCircle(CDC* pDC, CPoint p, LONG lRadius, COLORREF crColour, BOOL bDashed = FALSE);
- void DrawCircle(CDC* pDC, CPoint p, LONG lRadius, COLORREF crBright, COLORREF crDark);
- // Calculate colour for a point at the given angle by performing a linear
- // interpolation between the colours crBright and crDark based on the cosine
- // of the angle between the light source and the point.
- //
- // Angles are measured from the +ve x-axis (i.e. (1,0) = 0 degrees, (0,1) = 90 degrees )
- // But remember: +y points down!
- COLORREF GetColour(double dAngle, COLORREF crBright, COLORREF crDark)
- {
- #define Rad2Deg 180.0/3.1415
- #define LIGHT_SOURCE_ANGLE -2.356 // -2.356 radians = -135 degrees, i.e. From top left
- ASSERT(dAngle > -3.1416 && dAngle < 3.1416);
- double dAngleDifference = LIGHT_SOURCE_ANGLE - dAngle;
- if (dAngleDifference < -3.1415) dAngleDifference = 6.293 + dAngleDifference;
- else if (dAngleDifference > 3.1415) dAngleDifference = 6.293 - dAngleDifference;
- double Weight = 0.5*(cos(dAngleDifference)+1.0);
- BYTE Red = (BYTE) (Weight*GetRValue(crBright) + (1.0-Weight)*GetRValue(crDark));
- BYTE Green = (BYTE) (Weight*GetGValue(crBright) + (1.0-Weight)*GetGValue(crDark));
- BYTE Blue = (BYTE) (Weight*GetBValue(crBright) + (1.0-Weight)*GetBValue(crDark));
- //TRACE("LightAngle = %0.0f, Angle = %3.0f, Diff = %3.0f, Weight = %0.2f, RGB %3d,%3d,%3dn",
- // LIGHT_SOURCE_ANGLE*Rad2Deg, dAngle*Rad2Deg, dAngleDifference*Rad2Deg, Weight,Red,Green,Blue);
- return RGB(Red, Green, Blue);
- }
- void DrawCircle(CDC* pDC, CPoint p, LONG lRadius, COLORREF crColour, BOOL bDashed)
- {
- const int nDashLength = 1;
- LONG lError, lXoffset, lYoffset;
- int nDash = 0;
- BOOL bDashOn = TRUE;
- //Check to see that the coordinates are valid
- ASSERT( (p.x + lRadius <= LONG_MAX) && (p.y + lRadius <= LONG_MAX) );
- ASSERT( (p.x - lRadius >= LONG_MIN) && (p.y - lRadius >= LONG_MIN) );
- //Set starting values
- lXoffset = lRadius;
- lYoffset = 0;
- lError = -lRadius;
- do {
- if (bDashOn) {
- pDC->SetPixelV(p.x + lXoffset, p.y + lYoffset, crColour);
- pDC->SetPixelV(p.x + lXoffset, p.y - lYoffset, crColour);
- pDC->SetPixelV(p.x + lYoffset, p.y + lXoffset, crColour);
- pDC->SetPixelV(p.x + lYoffset, p.y - lXoffset, crColour);
- pDC->SetPixelV(p.x - lYoffset, p.y + lXoffset, crColour);
- pDC->SetPixelV(p.x - lYoffset, p.y - lXoffset, crColour);
- pDC->SetPixelV(p.x - lXoffset, p.y + lYoffset, crColour);
- pDC->SetPixelV(p.x - lXoffset, p.y - lYoffset, crColour);
- }
- //Advance the error term and the constant X axis step
- lError += lYoffset++;
- //Check to see if error term has overflowed
- if ((lError += lYoffset) >= 0)
- lError -= --lXoffset * 2;
- if (bDashed && (++nDash == nDashLength)) {
- nDash = 0;
- bDashOn = !bDashOn;
- }
- } while (lYoffset <= lXoffset); //Continue until halfway point
- }
- void DrawCircle(CDC* pDC, CPoint p, LONG lRadius, COLORREF crBright, COLORREF crDark)
- {
- LONG lError, lXoffset, lYoffset;
- //Check to see that the coordinates are valid
- ASSERT( (p.x + lRadius <= LONG_MAX) && (p.y + lRadius <= LONG_MAX) );
- ASSERT( (p.x - lRadius >= LONG_MIN) && (p.y - lRadius >= LONG_MIN) );
- //Set starting values
- lXoffset = lRadius;
- lYoffset = 0;
- lError = -lRadius;
- do {
- const double Pi = 3.141592654,
- Pi_on_2 = Pi * 0.5,
- Three_Pi_on_2 = Pi * 1.5;
- COLORREF crColour;
- double dAngle = atan2(lYoffset, lXoffset);
- //Draw the current pixel, reflected across all eight arcs
- crColour = GetColour(dAngle, crBright, crDark);
- pDC->SetPixelV(p.x + lXoffset, p.y + lYoffset, crColour);
- crColour = GetColour(Pi_on_2 - dAngle, crBright, crDark);
- pDC->SetPixelV(p.x + lYoffset, p.y + lXoffset, crColour);
- crColour = GetColour(Pi_on_2 + dAngle, crBright, crDark);
- pDC->SetPixelV(p.x - lYoffset, p.y + lXoffset, crColour);
- crColour = GetColour(Pi - dAngle, crBright, crDark);
- pDC->SetPixelV(p.x - lXoffset, p.y + lYoffset, crColour);
- crColour = GetColour(-Pi + dAngle, crBright, crDark);
- pDC->SetPixelV(p.x - lXoffset, p.y - lYoffset, crColour);
- crColour = GetColour(-Pi_on_2 - dAngle, crBright, crDark);
- pDC->SetPixelV(p.x - lYoffset, p.y - lXoffset, crColour);
- crColour = GetColour(-Pi_on_2 + dAngle, crBright, crDark);
- pDC->SetPixelV(p.x + lYoffset, p.y - lXoffset, crColour);
- crColour = GetColour(-dAngle, crBright, crDark);
- pDC->SetPixelV(p.x + lXoffset, p.y - lYoffset, crColour);
- //Advance the error term and the constant X axis step
- lError += lYoffset++;
- //Check to see if error term has overflowed
- if ((lError += lYoffset) >= 0)
- lError -= --lXoffset * 2;
- } while (lYoffset <= lXoffset); //Continue until halfway point
- }
- /////////////////////////////////////////////////////////////////////////////
- // CRoundButton
- CRoundButton::CRoundButton()
- {
- m_bDrawDashedFocusCircle = TRUE;
- }
- CRoundButton::~CRoundButton()
- {
- m_rgn.DeleteObject();
- }
- BEGIN_MESSAGE_MAP(CRoundButton, CButton)
- //{{AFX_MSG_MAP(CRoundButton)
- //}}AFX_MSG_MAP
- END_MESSAGE_MAP()
- /////////////////////////////////////////////////////////////////////////////
- // CRoundButton message handlers
- void CRoundButton::PreSubclassWindow()
- {
- CButton::PreSubclassWindow();
- ModifyStyle(0, BS_OWNERDRAW);
- CRect rect;
- GetClientRect(rect);
- // Resize the window to make it square
- rect.bottom = rect.right = min(rect.bottom,rect.right);
- // Get the vital statistics of the window
- m_ptCentre = rect.CenterPoint();
- m_nRadius = rect.bottom/2-1;
- // Set the window region so mouse clicks only activate the round section
- // of the button
- m_rgn.DeleteObject();
- SetWindowRgn(NULL, FALSE);
- m_rgn.CreateEllipticRgnIndirect(rect);
- SetWindowRgn(m_rgn, TRUE);
- // Convert client coords to the parents client coords
- ClientToScreen(rect);
- CWnd* pParent = GetParent();
- if (pParent) pParent->ScreenToClient(rect);
- // Resize the window
- MoveWindow(rect.left, rect.top, rect.Width(), rect.Height(), TRUE);
- }
- void CRoundButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
- {
- ASSERT(lpDrawItemStruct != NULL);
- CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
- CRect rect = lpDrawItemStruct->rcItem;
- UINT state = lpDrawItemStruct->itemState;
- UINT nStyle = GetStyle();
- int nRadius = m_nRadius;
- int nSavedDC = pDC->SaveDC();
- pDC->SelectStockObject(NULL_BRUSH);
- pDC->FillSolidRect(rect, ::GetSysColor(COLOR_BTNFACE));
- // Draw the focus circle around the button
- if ((state & ODS_FOCUS) && m_bDrawDashedFocusCircle)
- DrawCircle(pDC, m_ptCentre, nRadius--, RGB(0,0,0));
- // Draw the raised/sunken edges of the button (unless flat)
- if (nStyle & BS_FLAT) {
- DrawCircle(pDC, m_ptCentre, nRadius--, RGB(0,0,0));
- DrawCircle(pDC, m_ptCentre, nRadius--, ::GetSysColor(COLOR_3DHIGHLIGHT));
- } else {
- if ((state & ODS_SELECTED)) {
- DrawCircle(pDC, m_ptCentre, nRadius--,
- ::GetSysColor(COLOR_3DDKSHADOW), ::GetSysColor(COLOR_3DHIGHLIGHT));
- DrawCircle(pDC, m_ptCentre, nRadius--,
- ::GetSysColor(COLOR_3DSHADOW), ::GetSysColor(COLOR_3DLIGHT));
- } else {
- DrawCircle(pDC, m_ptCentre, nRadius--,
- ::GetSysColor(COLOR_3DHIGHLIGHT), ::GetSysColor(COLOR_3DDKSHADOW));
- DrawCircle(pDC, m_ptCentre, nRadius--,
- ::GetSysColor(COLOR_3DLIGHT), ::GetSysColor(COLOR_3DSHADOW));
- }
- }
- // draw the text if there is any
- CString strText;
- GetWindowText(strText);
- if (!strText.IsEmpty())
- {
- CRgn rgn;
- rgn.CreateEllipticRgn(m_ptCentre.x-nRadius, m_ptCentre.y-nRadius,
- m_ptCentre.x+nRadius, m_ptCentre.y+nRadius);
- pDC->SelectClipRgn(&rgn);
- CSize Extent = pDC->GetTextExtent(strText);
- CPoint pt = CPoint( m_ptCentre.x - Extent.cx/2, m_ptCentre.x - Extent.cy/2 );
- if (state & ODS_SELECTED) pt.Offset(1,1);
- pDC->SetBkMode(TRANSPARENT);
- if (state & ODS_DISABLED)
- pDC->DrawState(pt, Extent, strText, DSS_DISABLED, TRUE, 0, (HBRUSH)NULL);
- else
- pDC->TextOut(pt.x, pt.y, strText);
- pDC->SelectClipRgn(NULL);
- rgn.DeleteObject();
- }
- // Draw the focus circle on the inside of the button
- if ((state & ODS_FOCUS) && m_bDrawDashedFocusCircle)
- DrawCircle(pDC, m_ptCentre, nRadius-2, RGB(0,0,0), TRUE);
- pDC->RestoreDC(nSavedDC);
- }