vc++ 添加可以滚动整个窗口的滚动条(水平和竖直)并可使用鼠标滚动轮和键盘上的上下键控制滚动条

水平和竖直的滚动条可以在窗口的属性中添加，分别是：Horizontal scroll和Vertical scroll。

一.竖直滚动条

1.初始化

void CScroolDlgDlg::InitScrool()

{

CRect rtClient;

GetClientRect(rtClient);

SCROLLINFO vInfo;

vInfo.cbSize = sizeof(SCROLLINFO);

vInfo.fMask = SIF_ALL;

vInfo.nMax = 600;//这是你要滚动的范围

vInfo.nMin = vInfo.nPos = vInfo.nTrackPos = 0; //这个为0即可

vInfo.nPage = rtClient.bottom;//这是你窗口的高度（横向滚动条的话就是窗口的宽度）

SetScrollInfo(SB_VERT, &vInfo);//（SB_HORT就设置横向滚动条）

}

2.添加WM_VSCROLL事件

void CScroolDlgDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)

{

// TODO: Add your message handler code here and/or call default

SCROLLINFO vinfo = {0};

GetScrollInfo(SB_VERT, &vinfo, SIF_ALL);

int iPos = vinfo.nPos;

INT32 iMaxPos = vinfo.nMax-vinfo.nPage;

int hPage = vinfo.nPage;

int Inc = 1;

switch (nSBCode)

{

case SB_BOTTOM:
//滚动到最下面

if (vinfo.nPos < iMaxPos)

{

ScrollWindow(0, -1*Inc * (iMaxPos-vinfo.nPos));

vinfo.nPos = iMaxPos;

}

break;

case SB_TOP:
//滚动到最上面

if (vinfo.nPos > vinfo.nMin)

{

ScrollWindow(0, Inc * (vinfo.nPos-vinfo.nMin));

vinfo.nPos = vinfo.nMin;

}

break;

case SB_LINEUP:
//向上滚动一行

if (vinfo.nPos > vinfo.nMin)

{

ScrollWindow(0, Inc);

vinfo.nPos -= 1;

}

break;

case SB_LINEDOWN:
//向下滚动一行

if (vinfo.nPos < iMaxPos)

{

ScrollWindow(0, -1*Inc);

vinfo.nPos += 1;

}

break;

case SB_PAGEUP:
//向上滚动一页

if (vinfo.nPos-100 >= vinfo.nMin)

{

ScrollWindow(0, 100*Inc);

vinfo.nPos -= 100;

}

else

{

// ScrollWindow(0, (vinfo.nPos-iMaxPos)*Inc);

if (vinfo.nPos <= 0)

{

ScrollWindow(0,0);

}

else

{

ScrollWindow(0,vinfo.nPos);

}

// ScrollWindow(0, max(0,(vinfo.nPos-iMaxPos)*Inc));

vinfo.nPos = vinfo.nMin;

}

break;

case SB_PAGEDOWN:
//向下滚动一页

if (vinfo.nPos+100 <= iMaxPos)

{

ScrollWindow(0, -100*Inc);

vinfo.nPos += 100;

}

else

{

ScrollWindow(0, (vinfo.nPos-iMaxPos)*Inc);

vinfo.nPos = iMaxPos;

}

break;

case SB_ENDSCROLL:
//滚动条移动结束

break;

case SB_THUMBPOSITION:

break;

case SB_THUMBTRACK:

ScrollWindow(0, Inc * (vinfo.nPos - nPos));

vinfo.nPos = nPos;

break;

}

SetScrollInfo(SB_VERT, &vinfo);

CDialog::OnVScroll(nSBCode, nPos, pScrollBar);

}

二、水平滚动条

1.初始化

void CScroolDlgDlg::InitBottomScroll()

{

CRect rtClient;

GetClientRect(rtClient);

SCROLLINFO hInfo;

hInfo.cbSize = sizeof(SCROLLINFO);

hInfo.fMask = SIF_ALL;

hInfo.nMax = 1000;//这是你要滚动的范围

hInfo.nMin = hInfo.nPos = hInfo.nTrackPos = 0; //这个为0即可

hInfo.nPage = rtClient.Width();//这是窗口的宽度(如果是横向滚动条的话，就这是你窗口的高度)

SetScrollInfo(SB_HORZ, &hInfo);//（SB_VERT就设置纵向滚动条）

}

2.添加WM_HSCROLL事件

void CMySpaceSubmitInfo::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)

{

// TODO: Add your message handler code here and/or call default

SCROLLINFO hInfo = {0};

GetScrollInfo(SB_HORZ,&hInfo,SIF_ALL);

int iMaxPos = hInfo.nMax - hInfo.nPage;

int hPage = hInfo.nPage;

int inc = 1;

// Determine the new position of scroll box.

switch (nSBCode)

{

case SB_LEFT: // Scroll to far left.

ScrollWindow(inc *(hInfo.nPos-hInfo.nMin),0);

hInfo.nPos = hInfo.nMin;

break;

case SB_RIGHT: // Scroll to far right.

ScrollWindow(-1*inc*(iMaxPos - hInfo.nPos),0);

hInfo.nPos = iMaxPos;

break;

case SB_ENDSCROLL: // End scroll.

break;

case SB_LINELEFT: // Scroll left.

if (hInfo.nPos > hInfo.nMin)

{

ScrollWindow(inc,0);

hInfo.nPos -=1;

}

break;

case SB_LINERIGHT: // Scroll right.

if(hInfo.nPos <=iMaxPos)

{

ScrollWindow(-1*inc,0);

hInfo.nPos +=1;

}

break;

case SB_PAGELEFT: // Scroll one page left.

{

// Get the page size.

if (hInfo.nPos - 100 >= hInfo.nMin)

{

ScrollWindow(100*inc,0);

hInfo.nPos -=100;

}

else

{

if (hInfo.nPos <= 0)

{

ScrollWindow(0,0);

}

else

{

ScrollWindow(hInfo.nPos,0);

}

// ScrollWindow((hInfo.nPos - iMaxPos)*inc,0);

hInfo.nPos = hInfo.nMin;

}

}

break;

case SB_PAGERIGHT: // Scroll one page right.

{

// Get the page size.

if (hInfo.nPos + 100 <= iMaxPos)

{

ScrollWindow(-100*inc,0);

hInfo.nPos +=100;

}

else

{

ScrollWindow((hInfo.nPos - iMaxPos)*inc,0);

hInfo.nPos = iMaxPos;

}

}

break;

case SB_THUMBPOSITION: // Scroll to absolute position. nPos is the position

// curpos = nPos; // of the scroll box at the end of the drag operation.

break;

case SB_THUMBTRACK: // Drag scroll box to specified position. nPos is the

ScrollWindow(inc*(hInfo.nPos-nPos),0);

hInfo.nPos = nPos; // position that the scroll box has been dragged to.

break;

}

// Set the new position of the thumb (scroll box).

SetScrollInfo(SB_HORZ,&hInfo);

CDialog::OnHScroll(nSBCode, nPos, pScrollBar);

}

三、使用鼠标滑动轮来滑动竖直窗口滚动条

1.添加事件：ON_WM_MOUSEWHEEL

2.代码：

BOOL CScroolDlgDlg::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)

{

// TODO: Add your message handler code here and/or call default

SCROLLINFO vinfo = {0};

GetScrollInfo(SB_VERT, &vinfo, SIF_ALL);

int iPos = vinfo.nPos;

INT32 iMaxPos = vinfo.nMax-vinfo.nPage;

//首先判断鼠标滚动的方向/////////////////////////

//1.如果鼠标滚动条向上(远离使用者),此时zDelta的值为正.

//判断滚动条是否已经到了上顶了

if (zDelta > 0)

{

if (iPos <= 0)

{

;

}

else

{

int iScrollUp = iPos - zDelta;

if (iScrollUp < 0)

{

ScrollWindow(0,iPos);

vinfo.nPos = vinfo.nMin;

}

else

{

ScrollWindow(0,zDelta);

vinfo.nPos -= zDelta;

}

}

}

else if (zDelta < 0) //向下滑动鼠标滚动轮

{

if (iPos >= iMaxPos)

{

;

}

else

{

int iScrollDown = iPos + (-1)*zDelta;

if (iScrollDown > iMaxPos)

{

ScrollWindow(0,iPos-iMaxPos);

vinfo.nPos = iMaxPos;

}

else

{

ScrollWindow(0,zDelta);

vinfo.nPos = vinfo.nPos + (-1)*zDelta;

}

}

}

SetScrollInfo(SB_VERT,&vinfo);

return CDialog::OnMouseWheel(nFlags, zDelta, pt);

}

四、使用键盘上的上下箭头进行滑动窗口滚动条

1.添加消息：PreTranslateMessage

2.代码：

BOOL CScroolDlgDlg::PreTranslateMessage(MSG* pMsg)

{

// TODO: Add your specialized code here and/or call the base class

if (pMsg->message == WM_KEYDOWN)

{

if (pMsg->wParam == VK_DOWN)

{

int iScroNum = 5;

SCROLLINFO vInfo = {0};

GetScrollInfo(SB_VERT,&vInfo,SIF_ALL);

int iPos = vInfo.nPos;

INT32 iMax = vInfo.nMax - vInfo.nPage;

//首先判断窗口滚动条是否已经到了最下面

if (iPos >= iMax)

{

;

}

else

{

//判断向下滑动5像素后是否会超过向下滑动的最大值

int iScrolDown = iScroNum + iPos;

if (iScroNum > iMax) //超过了

{

ScrollWindow(0,iPos - iMax);

vInfo.nPos = iMax;

}

else if (iScrolDown <= iMax) //移动后不超过最下面

{

ScrollWindow(0,(-1)*iScroNum);

vInfo.nPos += iScroNum;

}

}

SetScrollInfo(SB_VERT,&vInfo);

}//end down

if (pMsg->wParam == VK_UP)

{

SCROLLINFO vInfo = {0};

GetScrollInfo(SB_VERT,&vInfo,SIF_ALL);

int iPos = vInfo.nPos;

UINT32 iMaxPos = vInfo.nMax - vInfo.nPage;

int iScroNum= 5;//移动的

//首先判断是否已经到了最顶部

if (iPos <= 0)

{

;

}

else

{

//判断当滚动后是否超出顶部

int iScrollUp = iPos - iScroNum;

if (iScrollUp < 0) //超出了

{

ScrollWindow(0,iPos);

vInfo.nPos = vInfo.nMin;

}

else if (iScrollUp >= 0)

{

ScrollWindow(0,iScroNum);

vInfo.nPos -= iScroNum;

}

}

SetScrollInfo(SB_VERT,&vInfo);

}//end up

}

return CDialog::PreTranslateMessage(pMsg);

}

附：水平有限，如有其他好的建议请各位同修提出。