上位机VC MFC通过自绘实现三角形按钮

qq263946146 · 2017-11-14 18:54:50

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文件名称:上位机VC MFC实现三角开按钮.rar
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例程通过自绘实现三角形按钮，效果如图，程序运行会启动一定时器不停地设置按钮方向，可以通过复选按钮设备，另外按钮的文本与使能状态也可以实现修改；

主要也是通过自绘的形式实现三角形按钮效果。要通过重载函数PreSubclassWindow设置按钮类属性为自绘属性ModifyStyle(0, BS_OWNERDRAW);

另外为使按钮重绘时不致于难看，自己写了个窗口位置设备的函数SetWindowPos，保证按钮的窗口大小为2的倍数

1.新建基于对话框的应用程序

2.从Cbutton派生自己的类CTriangleBtn，添加自己的成员变量与函数

public:

enumPOINTDIRECTION {POINT_UP, POINT_DOWN, POINT_LEFT, POINT_RIGHT};

POINTDIRECTIONGetDirection(){return PointDirection;}

voidSetDirection(POINTDIRECTION Direction){ PointDirection = Direction

reSubclassWindow();}

BOOLSetWindowPos(const CWnd* pWndInsertAfter, int x, int y, int cx, int cy, UINTnFlags );

protected:

POINTDIRECTIONPointDirection;

CRgnCurrentRegion;

3.重载DrawItem，PreSubclassWindow实现自绘，

void CTriangleBtn::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
ASSERT(lpDrawItemStruct != NULL);
CRect rect = lpDrawItemStruct->rcItem;
CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
UINT state = lpDrawItemStruct->itemState;
UINT nStyle = GetStyle();
int nSavedDC = pDC->SaveDC();
//make the rect a square
rect.bottom = rect.right = min(rect.bottom, rect.right);
pDC->FillSolidRect(rect, ::GetSysColor(COLOR_BTNFACE));
rect.right -= 1; rect.bottom -= 1; //avoid drawing outside area
//make some pens
CPen HighlightPen(PS_SOLID, 1, ::GetSysColor(COLOR_3DHIGHLIGHT));
CPen DarkShadowPen(PS_SOLID, 1, ::GetSysColor(COLOR_3DDKSHADOW));
CPen ShadowPen(PS_SOLID, 1, ::GetSysColor(COLOR_3DSHADOW));
CPen BlackPen(PS_SOLID, 1, RGB(0,0,0));
//NOTE: If U use this class for NT apps only, use the implementation of FocusPen below
// instead, as WIN95 doesn't support this yet (though the doc says **dang ms-fools**)
// (WIN98 might also support this)
//LOGBRUSH logbrush; logbrush.lbStyle = BS_SOLID; logbrush.lbColor = RGB(0,0,0); logbrush.lbHatch = NULL;
//CPen FocusPen(PS_COSMETIC | PS_ALTERNATE, 1, &logbrush);
CPen FocusPen(PS_DOT, 0, RGB(0,0,0));
//Draw button
switch (PointDirection) {
case POINT_UP : {
//Draw the raised/sunken edges of the button (unless flat)
if (nStyle & BS_FLAT) { //style is flat
pDC->SelectObject(BlackPen);
pDC->MoveTo(rect.right / 2, 0);
pDC->LineTo(0, rect.bottom);
pDC->LineTo(rect.right, rect.bottom);
pDC->LineTo(rect.right / 2, 0);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(rect.right / 2, 2);
pDC->LineTo(2, rect.bottom - 1);
pDC->LineTo(rect.right - 2, rect.bottom - 1);
pDC->LineTo(rect.right / 2, 2);
} else { //style not flat
if ((state & ODS_SELECTED)) { //Button is down
pDC->SelectObject(HighlightPen);
pDC->MoveTo(0, rect.bottom);
pDC->LineTo(rect.right - 1, rect.bottom);
pDC->LineTo(rect.right / 2, 0);
pDC->SelectObject(ShadowPen);
pDC->LineTo(0, rect.bottom);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(rect.right / 2 - 1, 4);
pDC->LineTo(1, rect.bottom);
} else { //Button is not down
pDC->SelectObject(HighlightPen);
pDC->MoveTo(rect.right /2, 0);
pDC->LineTo(0, rect.bottom - 1);
pDC->SelectObject(ShadowPen);
pDC->LineTo(rect.right - 1, rect.bottom - 1);
pDC->LineTo(rect.right / 2, 0);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(rect.right / 2 + 2, 3);
pDC->LineTo(rect.right + 1, rect.bottom + 1);
pDC->MoveTo(rect.right - 1, rect.bottom);
pDC->LineTo(1, rect.bottom);
}//else|if
}//else|if
break;
}//case
case POINT_DOWN : {
//Draw the raised/sunken edges of the button (unless flat)
if (nStyle & BS_FLAT) { //style is flat
pDC->SelectObject(BlackPen);
pDC->MoveTo(rect.right / 2, rect.bottom);
pDC->LineTo(0, 0);
pDC->LineTo(rect.right, 0);
pDC->LineTo(rect.right / 2, rect.bottom);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(rect.right / 2, rect.bottom - 2);
pDC->LineTo(2, 1);
pDC->LineTo(rect.right - 2, 1);
pDC->LineTo(rect.right / 2, rect.bottom - 2);
} else { //style not flat
if ((state & ODS_SELECTED)) { //Button is down
pDC->SelectObject(ShadowPen);
pDC->MoveTo(rect.right, 1);
pDC->LineTo(1, 1);
pDC->LineTo(rect.right / 2, rect.bottom - 1);
pDC->SelectObject(BlackPen);
pDC->MoveTo(rect.right - 2, 2);
pDC->LineTo(1, 2);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(rect.right + 1, 0);
pDC->LineTo(rect.right / 2 + 1, rect.bottom + 1);
} else { //Button is not down
pDC->SelectObject(ShadowPen);
pDC->MoveTo(0, 0);
pDC->LineTo(rect.right / 2, rect.bottom);
pDC->LineTo(rect.right, 0);
pDC->MoveTo(1, 1);
pDC->LineTo(rect.right / 2 + 1, rect.bottom);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(rect.right, 2);
pDC->LineTo(rect.right / 2 + 1, rect.bottom + 1);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(0, 0);
pDC->LineTo(rect.right, 0);
}
}//else|if
break;
}//case
case POINT_LEFT : {
if (nStyle & BS_FLAT) { //style is flat
pDC->SelectObject(BlackPen);
pDC->MoveTo(rect.right, 0);
pDC->LineTo(0, rect.bottom / 2);
pDC->LineTo(rect.right, rect.bottom);
pDC->LineTo(rect.right, 0);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(rect.right - 1, 2);
pDC->LineTo(3, rect.bottom / 2);
pDC->LineTo(rect.right - 1, rect.bottom - 2);
pDC->LineTo(rect.right - 1, 2);
} else { //style not flat
if ((state & ODS_SELECTED)) { //Button is down
pDC->SelectObject(ShadowPen);
pDC->MoveTo(rect.right, 0);
pDC->LineTo(0, rect.bottom / 2);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(rect.right, 1);
pDC->LineTo(2, rect.bottom / 2);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(rect.right, 0);
pDC->LineTo(rect.right, rect.bottom);
pDC->LineTo(0, rect.bottom / 2);
} else { //Button is not down
pDC->SelectObject(ShadowPen);
pDC->MoveTo(rect.right - 1, 0);
pDC->LineTo(rect.right - 1, rect.bottom - 1);
pDC->LineTo(0, rect.bottom / 2);
pDC->MoveTo(1, rect.bottom / 2 + 1);
pDC->LineTo(6, rect.bottom / 2 + 4);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(rect.right, 1);
pDC->LineTo(rect.right, rect.bottom);
pDC->LineTo(2, rect.bottom / 2 + 2);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(0, rect.bottom / 2);
pDC->LineTo(rect.right, 0);
}
}//else|if
break;
}//case
case POINT_RIGHT : {
if (nStyle & BS_FLAT) { //style is flat
pDC->SelectObject(BlackPen);
pDC->MoveTo(0, 0);
pDC->LineTo(rect.right, rect.bottom / 2);
pDC->LineTo(0, rect.bottom);
pDC->LineTo(0, 0);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(1, 2);
pDC->LineTo(rect.right - 2, rect.bottom / 2);
pDC->LineTo(1, rect.bottom - 2);
pDC->LineTo(1, 2);
} else { //style not flat
if ((state & ODS_SELECTED)) { //Button is down
pDC->SelectObject(ShadowPen);
pDC->MoveTo(0, rect.bottom);
pDC->LineTo(0, 0);
pDC->LineTo(rect.right, rect.bottom / 2);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(1, rect.bottom - 2);
pDC->LineTo(1, 1);
pDC->MoveTo(rect.right - 3, rect.bottom / 2);
pDC->LineTo(0, 1);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(0, rect.bottom);
pDC->LineTo(rect.right, rect.bottom / 2);
} else { //Button is not down
pDC->SelectObject(ShadowPen);
pDC->MoveTo(0, rect.bottom);
pDC->LineTo(rect.right, rect.bottom / 2);
pDC->SelectObject(DarkShadowPen);
pDC->MoveTo(0, rect.bottom + 1);
pDC->LineTo(rect.right, rect.bottom / 2 + 1);
pDC->SelectObject(HighlightPen);
pDC->MoveTo(0, rect.bottom);
pDC->LineTo(0, 0);
pDC->LineTo(rect.right, rect.bottom / 2);
}
}//else|if
break;
}//case
default :
ASSERT(FALSE);
}//switch
//Draw text if any
CString strText;
GetWindowText(strText);
if (!strText.IsEmpty()) {
CSize TextExtent = pDC->GetTextExtent(strText);
CPoint TextPos;
pDC->SetBkMode(TRANSPARENT);
switch (PointDirection) {
case POINT_UP : {
TextPos = CPoint((int)(rect.right / 2.0 - TextExtent.cx / 2.0),
rect.bottom - (int)(rect.bottom / 5.0 + TextExtent.cy));
int iXLimit = (int)((rect.bottom / 5.0 + TextExtent.cy) * 4.0 / 7.0);
CRgn rgn; rgn.CreateRectRgn(iXLimit, TextPos.y, rect.right - iXLimit, rect.bottom - 2);
pDC->SelectClipRgn(&rgn);
break;
}//case
case POINT_DOWN : {
TextPos = CPoint((int)(rect.right / 2.0 - TextExtent.cx / 2.0),
(int)(rect.bottom / 5.0));
int iXLimit = (int)((rect.bottom / 5.0 + TextExtent.cy) * 4.0 / 7.0);
CRgn rgn; rgn.CreateRectRgn(iXLimit, (int)(rect.bottom / 5.0), rect.right - iXLimit, (int)(rect.bottom / 5.0) + TextExtent.cy + 2);
pDC->SelectClipRgn(&rgn);
break;
}
case POINT_LEFT : {
TextPos = CPoint((int)((rect.right / 2.0 - TextExtent.cx / 2.0) + (rect.right / 8.0)),
(int)(rect.bottom / 2.0 - TextExtent.cy / 2.0) );
int iXLimitLeft = (int)(TextExtent.cy / 2.0 * 7.0 / 4.0) + 4;
int iXLimitRight = rect.right - 4;
CRgn rgn; rgn.CreateRectRgn(iXLimitLeft, (int)(rect.bottom / 2.0 - TextExtent.cy / 2.0),
iXLimitRight, (int)(rect.bottom / 2.0 + TextExtent.cy / 2.0) );
pDC->SelectClipRgn(&rgn);
break;
}//case
case POINT_RIGHT : {
TextPos = CPoint((int)((rect.right / 2.0 - TextExtent.cx / 2.0) - (rect.right / 8.0)),
(int)(rect.bottom / 2.0 - TextExtent.cy / 2.0) );
int iXLimitLeft = 4;
int iXLimitRight = rect.right - (int)(TextExtent.cy / 2.0 * 7.0 / 4.0) - 4;
CRgn rgn; rgn.CreateRectRgn(iXLimitLeft, (int)(rect.bottom / 2.0 - TextExtent.cy / 2.0),
iXLimitRight, (int)(rect.bottom / 2.0 + TextExtent.cy / 2.0) );
pDC->SelectClipRgn(&rgn);
break;
}//case
default :
ASSERT(FALSE);
}//switch
//common for all directions
if (state & ODS_SELECTED) TextPos.Offset(1,1);
if (state & ODS_DISABLED) {
pDC->DrawState(TextPos, TextExtent, strText, DSS_DISABLED, TRUE, 0, (HBRUSH)NULL);
} else {
pDC->TextOut(TextPos.x, TextPos.y, strText);
}
}//if
//Draw the focus triangle on the inside of the button if we have focus
if ((state & ODS_FOCUS)) {
CRgn rgn; rgn.CreateRectRgn(rect.left, rect.top, rect.right, rect.bottom);
pDC->SelectClipRgn(&rgn);
pDC->SelectObject(FocusPen);
switch (PointDirection) {
case POINT_UP : {
pDC->MoveTo(rect.right / 2, 12);
pDC->LineTo(9, rect.bottom - 6);
pDC->LineTo(rect.right - 9, rect.bottom - 6);
pDC->LineTo(rect.right / 2, 12);
break;
}
case POINT_DOWN : {
pDC->MoveTo(rect.right / 2 + 1, rect.bottom - 13);
pDC->LineTo(10, 6);
pDC->LineTo(rect.right - 9, 6);
pDC->LineTo(rect.right / 2 + 1, rect.bottom - 13);
break;
}
case POINT_LEFT : {
pDC->MoveTo(12, rect.bottom / 2);
pDC->LineTo(rect.right - 6, 9);
pDC->LineTo(rect.right - 6, rect.bottom - 9);
pDC->LineTo(12, rect.bottom / 2);
break;
}//case
case POINT_RIGHT : {
pDC->MoveTo(6, 9);
pDC->LineTo(rect.right - 12, rect.bottom / 2);
pDC->LineTo(6, rect.bottom - 9);
pDC->LineTo(6, 9);
break;
}//case
default :
ASSERT(FALSE);
}//switch
}//if
pDC->RestoreDC(nSavedDC);
}
void CTriangleBtn::PreSubclassWindow()
{
CButton::PreSubclassWindow();
//get client rectangle
CRect rect;
GetClientRect(rect);
rect.bottom = rect.right = min(rect.bottom,rect.right); //make it square
rect.bottom -= rect.bottom % 2; rect.right -= rect.right % 2;
SetWindowPos(NULL, 0, 0, rect.right, rect.bottom, SWP_NOMOVE | SWP_NOZORDER);
CPoint Head, RightLeg, LeftLeg;
switch (PointDirection) {
case POINT_UP :
Head.x = rect.right / 2; Head.y = 0;
RightLeg.x = rect.right; RightLeg.y = rect.bottom;
LeftLeg.x = 0; LeftLeg.y = rect.bottom;
break;
case POINT_DOWN :
Head.x = rect.right / 2; Head.y = rect.bottom;
RightLeg.x = 0; RightLeg.y = 0;
LeftLeg.x = rect.right; LeftLeg.y = 0;
break;
case POINT_LEFT :
Head.x = 0; Head.y = rect.bottom / 2;
RightLeg.x = rect.right; RightLeg.y = 0;
LeftLeg.x = rect.right; LeftLeg.y = rect.bottom;
break;
case POINT_RIGHT :
Head.x = rect.right; Head.y = rect.bottom / 2;
RightLeg.x = 0; RightLeg.y = rect.bottom;
LeftLeg.x = 0; LeftLeg.y = 0;
break;
default :
ASSERT(FALSE);
}//switch
CPoint points[3];
points[0] = Head; points[1] = RightLeg; points[2] = LeftLeg;
SetWindowRgn(NULL, FALSE);
CurrentRegion.DeleteObject();
CurrentRegion.CreatePolygonRgn(points, 3, ALTERNATE);
SetWindowRgn(CurrentRegion, TRUE);
ModifyStyle(0, BS_OWNERDRAW);
}

复制代码

4.类写好了就是如何使用，如例程界面添加控件，其中按钮控件全部关联CTriangleBtn的变量。依次双击单选框与复选框，添加点击函数便可

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上位机VC MFC通过自绘实现三角形按钮

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