MFC 界面自适应不同分辨率

引用：(36条消息) MFC 界面自动调整适应不同分辨率_weixin_42359982的博客-CSDN博客_mfc窗口适应屏幕

首先获取界面对话框的原始尺寸

Rect recta;
GetClientRect(&recta); //取客户区大小
m_oldPoint.x = recta.right - recta.left; //m_oldPoint是成员变量，用于保存上一次的界面尺寸
m_oldPoint.y = recta.bottom - recta.top;

再获取电脑屏幕分辨率，并将对话框在屏幕上作一个合适的位置调整

int screenwidth = GetSystemMetrics(SM_CXFULLSCREEN);//获取屏幕分辨率宽度,不包括任务栏等区域
int screenheight = GetSystemMetrics(SM_CYFULLSCREEN);//获取屏幕分辨率高度,不包括任务栏等区域
CRect rect(screenwidth / 20, screenheight / 20, (screenwidth / 20) * 19, (screenheight / 20) * 19); //设置对话框在屏幕上显示的位置
CWnd * pWnd = AfxGetMainWnd();
pWnd->MoveWindow(rect);

由于对话框进行了调整，所以对话框的各个空间都要进行相应的调整：

void CMFCTestDlg::ReSize()
{
    float fsp[2];
    POINT Newp; //现在对话框的大小
    CRect recta;
    GetClientRect(&recta); //取客户区大小
    Newp.x = recta.right - recta.left;
    Newp.y = recta.bottom - recta.top;
    fsp[0] = (float)Newp.x / m_oldPoint.x;
    fsp[1] = (float)Newp.y / m_oldPoint.y;
    CRect Rect;
    int woc;
    CPoint OldTLPoint, TLPoint; //左上角
    CPoint OldBRPoint, BRPoint; //右下角
    HWND hwndChild = ::GetWindow(m_hWnd, GW_CHILD); //列出所有控件
    while (hwndChild)
    {
        woc = ::GetDlgCtrlID(hwndChild);//取得ID
        GetDlgItem(woc)->GetWindowRect(Rect);
        ScreenToClient(Rect);

    OldTLPoint = Rect.TopLeft();
    TLPoint.x = long(OldTLPoint.x * fsp[0]);
    TLPoint.y = long(OldTLPoint.y * fsp[1]);
    OldBRPoint = Rect.BottomRight();
    BRPoint.x = long(OldBRPoint.x * fsp[0]);
    BRPoint.y = long(OldBRPoint.y * fsp[1]);
    Rect.SetRect(TLPoint, BRPoint);

    GetDlgItem(woc)->MoveWindow(Rect, TRUE); //控件自适应
    hwndChild = ::GetWindow(hwndChild, GW_HWNDNEXT);
    }
    m_oldPoint = Newp;
}                

只要对话框调整了，就可以调用ReSize()对控件进行调整

PS：通常光是控件自适应调整是不够的，控件上显示的字体也要自适应调整。可以将下方代码加入到控件自适应后面

char sControlClassName[MAX_PATH] = { 0 };
GetClassNameA(hwndChild, sControlClassName, MAX_PATH);
if (strcmp(sControlClassName, "Static") == 0 ||
strcmp(sControlClassName, "Button") == 0)
{
    CString sText;
    int iFontSize; //常用分辨率下，比较合适的字体大小
    GetDlgItem(woc)->GetWindowText(sText);
    int iLength = sText.GetLength();

    int height = Rect.bottom - Rect.top;
    int width = Rect.right - Rect.left;
    CFont* pFont = GetDlgItem(woc)->GetFont();
    LOGFONT lf;
    pFont->GetLogFont(&lf);
    pFont->DeleteObject();
    lf.lfHeight = height * 4 / 5;
    iFontSize = 9;
    if((iLength * iFontSize) > width)
    {
        lf.lfWidth = width / iLength;
    }
    else
    {
        lf.lfWidth = iFontSize;
    }

    m_MainUIFont.CreateFontIndirect(&lf);
    GetDlgItem(woc)->SetFont(&m_MainUIFont);//控件字体自适应
    m_MainUIFont.Detach();
}

最后再说明下CMFCTestDlg.h头文件里定义的几个变量和函数

POINT m_oldPoint;
CFont m_MainUIFont;
void ReSize();