修改BUTTON背景颜色.doc

/定义色彩const COLORREF CLOUDBLUE = RGB(128, 184, 223);const COLORREF WHITE = RGB(255, 255, 255);const COLORREF BLACK = RGB(1, 1, 1);const COLORREF DKGRAY = RGB(128, 128, 128);const COLORREF LTGRAY = RGB(192, 192, 192);const COLORREF YELLOW = RGB(255, 255, 0);const COLORREF DKYELLOW = RGB(128, 128, 0);const COLORREF RED = RGB(255, 0, 0);const COLORREF DKRED = RGB(128, 0, 0);const COLORREF BLUE = RGB(0, 0, 255);const COLORREF DKBLUE = RGB(0, 0, 128);const COLORREF CYAN = RGB(0, 255, 255);const COLORREF DKCYAN = RGB(0, 128, 128);const COLORREF GREEN = RGB(0, 255, 0);const COLORREF DKGREEN = RGB(0, 128, 0);const COLORREF MAGENTA = RGB(255, 0, 255);const COLORREF DKMAGENTA = RGB(128, 0, 128);/在.h文件定义彩色按钮CColorButton m_btnUp;/在.cpp文件调用函数着色VERIFY(m_btnUp.Attach(IDC_BUTTON1, this, RED, WHITE, DKRED); /CColorButton 类原型/colorbtn.h#ifndef _COLORBTN_H_#define _COLORBTN_H_class CColorButton : public CButtonDECLARE_DYNAMIC(CColorButton)public:CColorButton(); virtual CColorButton(); BOOL Attach(const UINT nID, CWnd* pParent, const COLORREF BGColor = RGB(192, 192, 192), / gray buttonconst COLORREF FGColor = RGB(1, 1, 1), / black text const COLORREF DisabledColor = RGB(128, 128, 128), / dark gray disabled textconst UINT nBevel = 2);protected:virtual void DrawItem(LPDRAWITEMSTRUCT lpDIS);void DrawFrame(CDC *DC, CRect R, int Inset);void DrawFilledRect(CDC *DC, CRect R, COLORREF color);void DrawLine(CDC *DC, CRect EndPoints, COLORREF color);void DrawLine(CDC *DC, long left, long top, long right, long bottom, COLORREF color);void DrawButtonText(CDC *DC, CRect R, const char *Buf, COLORREF TextColor);COLORREF GetFGColor() return m_fg; COLORREF GetBGColor() return m_bg; COLORREF GetDisabledColor() return m_disabled; UINT GetBevel() return m_bevel; private:COLORREF m_fg, m_bg, m_disabled;UINT m_bevel;#endif /colorbtn.cpp#include stdafx.h #include colorbtn.h #ifdef _DEBUG#undef THIS_FILEstatic char BASED_CODE THIS_FILE = _FILE_;#endif#ifdef CColorButton#undef CColorButton CColorButton#endifIMPLEMENT_DYNAMIC(CColorButton, CButton)CColorButton:CColorButton() #if (_MFC_VER hDC);UINT state = lpDIS- itemState; CRect focusRect, btnRect;focusRect.CopyRect(&lpDIS- rcItem); btnRect.CopyRect(&lpDIS- rcItem); focusRect.left += 4;focusRect.right -= 4;focusRect.top += 4;focusRect.bottom -= 4;const int bufSize = 512;TCHAR bufferbufSize;GetWindowText(buffer, bufSize);DrawFilledRect(pDC, btnRect, GetBGColor(); DrawFrame(pDC, btnRect, GetBevel(); DrawButtonText(pDC, btnRect, buffer, GetFGColor();if (state & ODS_FOCUS) DrawFocusRect(lpDIS- hDC, (LPRECT)&focusRect);if (state & ODS_SELECTED) DrawFilledRect(pDC, btnRect, GetBGColor(); DrawFrame(pDC, btnRect, -1); DrawButtonText(pDC, btnRect, buffer, GetFGColor();DrawFocusRect(lpDIS- hDC, (LPRECT)&focusRect);else if (state & ODS_DISABLED) DrawButtonText(pDC, btnRect, buffer, GetDisabledColor(); void CColorButton:DrawFrame(CDC *DC, CRect R, int Inset) COLORREF dark, light, tlColor, brColor;int i, m, width;width = (Inset 0)? -Inset : Inset;for (i = 0; i width; i += 1) m = 255 / (i + 2);dark = PALETTERGB(m, m, m);m = 192 + (63 / (i + 1);light = PALETTERGB(m, m, m); if ( width = 1 ) light = RGB(255, 255, 255);dark = RGB(128, 128, 128);if ( Inset 0 ) tlColor = dark;brColor = light;else tlColor = light;brColor = dark;DrawLine(DC, R.left, R.top, R.right, R.top, tlColor); / Across topDrawLine(DC, R.left, R.top, R.left, R.bottom, tlColor); / Down left if ( (Inset 1) ) DrawLine(DC, R.left + 1, R.bottom - 1, R.right, R.bottom - 1, RGB(1, 1, 1);/ Across bottomDrawLine(DC, R.right - 1, R.top + 1, R.right - 1, R.bottom, RGB(1, 1, 1); / Down right else DrawLine(DC, R.left + 1, R.bottom - 1, R.right, R.bottom - 1, brColor); / Across bottomDrawLine(DC, R.right - 1, R.top + 1, R.right - 1, R.bottom, brColor); / Down right InflateRect(R, -1, -1);void CColorButton:DrawFilledRect(CDC *DC, CRect R, COLORREF color) CBrush B;B.CreateSolidBrush(color);DC- FillRect(R, &B);void CColorButton:DrawLine(CDC *DC, CRect EndPoints, COLORREF color) CPen newPen;newPen.CreatePen(PS_SOLID, 1, color);CPen *oldPen = DC- SelectObject(&newPen);DC- MoveTo(EndPoints.left, EndPoints.top);DC- LineTo(EndPoints.right, EndPoints.bottom);DC- SelectObject(oldPen); newPen.DeleteObject();void CColorButton:DrawLine(CDC *DC, long left, long top, long right, long bottom, COLORREF color) CPen newPen;newPen.CreatePen(PS_SOLID, 1, color);CPen *oldPen = DC- SelectObject(&newPen);DC- MoveTo(left, top);DC- LineTo(right, bottom);DC- SelectObject(oldPen); newPen.DeleteObject();void CColorButton:DrawButtonText(CDC *DC, CRect R, const char *Buf, COLORREF TextColor) COLORREF prevColor = DC- SetTextColor(TextColor); DC- SetBkMode(TRANSPARENT);DC- DrawText(Buf, strlen(Buf), R, DT_CENTER and DT_VCENTER and DT_SINGLELINE);DC- SetTextColor(prevColor);能够实现的代码：要想修改CButton类按钮背景颜色和文字颜色，必须利用自绘方法对按钮进行重新绘制。这可以通过定义一个以CButton为基类的新按钮类来实现。以下为具体的实现方法：加入一个新类，类名：CMyButton，基类：CButton。在头文件MyButton.h中加入以下变量和函数定义：private:intm_Style;/按钮形状（0-正常，1-当前，2-按下，3-锁定）BOOLb_InRect;/鼠标进入标志CStringm_strText;/按钮文字COLORREFm_ForeColor;/文本颜色COLORREFm_BackColor;/背景色COLORREFm_LockForeColor;/锁定按钮的文字颜色CRectm_ButRect;/按钮尺寸CFont*p_Font;/字体voidDrawButton(CDC*pDC);/画正常的按钮/接口函数public:voidSetText(CStringstr);voidSetForeColor(COLORREFcolor);/设置文本颜色voidSetBkColor(COLORREFcolor);/设置背景颜色voidSetTextFont(intFontHight,LPCTSTRFontName);/设置字体在MyButton.cpp的构造函数中初始化变量：CMyButton:CMyButton()m_Style=0;/按钮形状风格b_InRect=false;/鼠标进入标志m_strText=_T();/按钮文字（使用默认文字）m_ForeColor=RGB(0,0,0);/文字颜色（黑色）m_BackColor=RGB(243,243,243);/背景色（灰白色）m_LockForeColor=GetSysColor(COLOR_GRAYTEXT);/锁定按钮的文字颜色p_Font=NULL;/字体指针用ClassWizard添加下列消息函数：PreSubclassWindow();DrawItem();onMouseMove();OnLButtonDown();OnLButtonUp();在各函数内加入代码：voidCMyButton:PreSubclassWindow()ModifyStyle(0,BS_OWNERDRAW);/设置按钮属性为自画式CButton:PreSubclassWindow();PreSubclassWindow()在按钮创建前自动执行，所以我们可以在其中做一些初始工作。这里我只做了一项工作，就是为按钮设置属性为“自绘”式，这样，用户在添加按钮后，就不需设置“Ownerdraw”属性了。voidCMyButton:DrawItem(LPDRAWITEMSTRUCTlpDrawItemStruct)CDC*pDC=CDC:FromHandle(lpDrawItemStruct-hDC);m_ButRect=lpDrawItemStruct-rcItem;/获取按钮尺寸if(m_strText.IsEmpty()GetWindowText(m_strText);/获取按钮文本intnSavedDC=pDC-SaveDC();VERIFY(pDC);DrawButton(pDC);/绘制按钮pDC-RestoreDC(nSavedDC);DrawItem()函数是一个关键函数，按钮的绘制工作就在这里进行，它的作用相当于对话框中的OnPaint()函数和视图中的OnDraw()函数。这里我做了三项工作：获取按钮尺寸、获取按钮文本、绘制按钮。其中绘制工作在自定义函数DrawButton()中完成。以下就是绘制过程：voidCMyButton:DrawButton(CDC*pDC)/调整状态if(m_Style=3)m_Style=0;if(GetStyle()&WS_DISABLED)m_Style=3;/禁止状态/根据状态调整边框颜色和文字颜色COLORREFbColor,fColor;/bColor为边框颜色，fColor为文字颜色switch(m_Style)case0:bColor=RGB(192,192,192);fColor=m_ForeColor;break;/正常按钮case1:bColor=RGB(255,255,255);fColor=m_ForeColor;break;/鼠标进入时按钮case2:bColor=RGB(192,192,192);fColor=m_ForeColor;break;/按下的按钮case3:bColor=m_BackColor;fColor=m_LockForeColor;break;/锁定的按钮/绘制按钮背景CBrushBrush;Brush.CreateSolidBrush(m_BackColor);/背景刷pDC-SelectObject(&Brush);CPenPen;Pen.CreatePen(PS_SOLID,1,bColor);pDC-SelectObject(&Pen);pDC-RoundRect(&m_ButRect,CPoint(5,5);/画圆角矩形/绘制按钮按下时的边框if(m_Style!=2)CRectRect;Rect.SetRect(m_ButRect.left+2,m_ButRect.top+1,m_ButRect.right,m_ButRect.bottom);pDC-DrawEdge(&Rect,BDR_RAISEDINNER,BF_RECT);/画边框/绘制按钮文字pDC-SetTextColor(fColor);/画文字pDC-SetBkMode(TRANSPARENT);pDC-DrawText(m_strText,&m_ButRect,DT_SINGLELINE|DT_CENTER|DT_VCENTER|DT_END_ELLIPSIS);/绘制拥有焦点按钮的虚线框if(GetFocus()=this)CRectRect;Rect.SetRect(m_ButRect.left+3,m_ButRect.top+2,m_ButRect.right-3,m_ButRect.bottom-2);pDC-DrawFocusRect(&Rect);/画拥有焦点的虚线框变量m_Style表征当前按钮状态，它的取值为：0-正常，1-当前，2-按下，3-锁定。不同状态下按钮的边框颜色和文字颜色有所不同。m_Style的值在鼠标响应函数中进行修改。绘制工作主要利用CDC类的绘图函数完成，主要注意在m_Style不同取值下表现出来的差别。voidCMyButton:onMouseMove(UINTnFlags,CPointpoint)if(!b_InRect|GetCapture()!=this)/鼠标进入按钮b_InRect=true;/设置进入标志SetCapture();/捕获鼠标m_Style=1;/设置按钮状态Invalidate();/重绘按钮elseif(!m_ButRect.PtInRect(point)/鼠标离开按钮b_InRect=false;/清除进入标志ReleaseCapture();/释放捕获的鼠标m_Style=0;/设置按钮状态Invalidate();/重绘按钮CButton:onMouseMove(nFlags,point);onMouseMove()函数是鼠标移动消息函数，用于判定当前鼠标指针是否在按钮上。b_InRect是个标志，为true表示鼠标指针进入了按钮区域，此时要捕获鼠标，让鼠标命令传送给按钮。当鼠标指针离开按钮时，要清除b_InRect标志，并且释放捕获的鼠标，让其它窗口可以接收鼠标命令。Invalidate()函数用于更新按钮，它会自动调用DrawItem()函数重新绘制按钮。设置条件的目的是仅在鼠标指针进入按钮和离开按钮时更新按钮，这样可以防止鼠标在按钮上移动时发生闪烁。voidCMyButton:OnLButtonDown(UINTnFlags,CPointpoint)m_Style=2;Invalidate();/重绘按钮CButton:OnLButtonDown(nFlags,point);OnLButtonDown()函数是单击鼠标左键时的消息函数。这里只是重新绘制按钮，具体的单击响应应该在拥有按钮的对话框或视图中进行。voidCMyButton:OnLButtonUp(UINTnFlags,CPointpoint)m_Style=1;Invalidate();/重绘按钮CButton:OnLButtonUp(nFlags,point);OnLButtonUp()函数是单击鼠标左键后弹起时的消息函数。这里也只是重绘按钮，这样能使按钮在按下和弹起时有所不同，使按钮看上去有动态效果。接口函数是用CMyButton类定义的按钮修改颜色、字体和按钮文字的接口，由以下函数组成：/设置按钮文本voidCMyButton:SetText(CStringstr)m_strText=_T();SetWindowText(str);/设置文本颜色voidCMyButton:SetForeColor(COLORREFcolor)m_ForeColor=color;Invalidate();/设置背景颜色voidCMyButton:SetBkColor(COLORREFcolor)m_BackColor=color;Invalidate();/设置字体(字体高度、字体名)voidCMyButton:SetTextFont(intFontHight,LPCTSTRFontName)if(p_Font)deletep_Font;/删除旧字体p_Font=newCFont;p_Font-CreatePointFont(FontHight,FontName);/创建新字体SetFont(p_Font);/设置字体由于新字体由new生成，必须显式回收，这项工作可以在CMyButton类的析构函数中进行：CMyButton:CMyButton()if(p_Font)deletep_Font;/删除字体这样一个可设置颜色、字体的按钮类就做好了。使用时，先在对话框中放置好按钮，再用ClassWizard为按钮添加控制变量，并且将变量的类型设置为CMyButton。之后，可以用该变量调用接口函数设置按钮颜色和字体。