WM_CTLCOLOR和OnCtlColor消息的用法

来自:https://blog.csdn.net/stephen1315/article/details/7575799?utm_medium=distribute.pc_relevant.none-task-blog-title-7&spm=1001.2101.3001.4242

 

WM_CTLCOLOR消息用来完成对EDIT、STATIC、BUTTON等控件设置背景和字体颜色,其用法如下:

1.首先在自己需要设置界面的对话框上点击右键-->建立类向导-->加入WM_CTLCOLOR消息-->自动生成OnCtlColor()函数,此函数可以对本对话框的控件的界面外观做修饰,用法如下:
将类向导产生的函数做如下修改:

 HBRUSH CDialogColor::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
    HBRUSH hbr = CDialog::OnCtlColor(pDC,pWnd, nCtlColor);
    // TODO: Change any attributes of theDC here
    //设置显示字体
    CFont * cFont=new CFont;
    cFont->CreateFont(16,0,0,0,FW_SEMIBOLD,FALSE,FALSE,0, ANSI_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH&FF_SWISS,"Arial");
    //对特定的控件做修改
    switch(nCtlColor)
    {
        case CTLCOLOR_STATIC: //对所有静态文本控件的设置
        {
        pDC->SetBkMode(TRANSPARENT); 
        //设置背景为透明
        pDC->SetTextColor(RGB(255,255,0)); //设置字体颜色
        pWnd->SetFont(cFont); //设置字体
        HBRUSH B = CreateSolidBrush(RGB(125,125,255)); 
        //创建画刷
        return (HBRUSH) B; //返回画刷句柄
        }
        case CTLCOLOR_EDIT: //对所有编辑框的设置
        {
        pDC->SetBkMode(TRANSPARENT); 
        pDC->SetTextColor(RGB(255,255,0)); 
        pWnd->SetFont(cFont); 
        HBRUSH B = CreateSolidBrush(RGB(125,125,255)); 
        return (HBRUSH) B; 
        }
        default:
        return CDialog::OnCtlColor(pDC,pWnd, nCtlColor);
    }
}


注:case的类别有以下几种: 
CTLCOLOR_BTN 按钮控件 
CTLCOLOR_DLG 对话框 
CTLCOLOR_EDIT 编辑框 
CTLCOLOR_LISTBOX 列表框 
CTLCOLOR_MSGBOX 消息框 
CTLCOLOR_SCROLLBAR 滚动条 
CTLCOLOR_STATIC 静态文本 
2.你可能觉得对所有的控件使用统一的界面设置觉得不自由,其实VC同样可以对特定的ID的控件进行设置,方法如下:

 
switch (pWnd->GetDlgCtrlID()) 
{ 
    //针对ID为IDC_CTL1、IDC_CTL2和IDC_CTL3的控件进行同样的设置
    case IDC_CTL1:
    case IDC_CTL2:
    case IDC_CTL3: 
    {
        pDC->SetBkMode(TRANSPARENT);
        pDC->SetTextColor(RGB(255,255, 0));
        pWnd->SetFont(cFont);
        HBRUSH B = CreateSolidBrush(RGB(125,125,255));
        return (HBRUSH) B;
    }
    default:
    return CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
}
 
 通过消息WM_CTLCOLOR我们可以改变对话框或一些特殊控件的背景颜色
1、添加WM_CTLCOLOR消息映射。
2、在CWnd::OnCtlColor里面作相应的处理
HRESULT CWnd::OnCtlColor(CDC *pDC, CWnd *pWnd, UINT nCtlColor)
{
     switch (nCtlColor)
     {
         case CTLCOLOR_BTN:                 // Button control 
         {
             pDC->SetBkColor( RGB( 255, 0, 0) );
         }
         break;
         case CTLCOLOR_DLG:                 // Dialog box 
         break;
         case CTLCOLOR_EDIT:                 // Edit control 
         {
             COLORREF bkColor = RGB(255,0,0);
             CRect rect;
             pWnd->GetClientRect(&rect); 
CBrush br;
             br.CreateSolidBrush(bkColor);
             pDC->FillRect(rect, &br);*/
             pDC->SetBkColor(bkColor);
         }
         break;
         case CTLCOLOR_LISTBOX:         // List-box control 
         break;
         case CTLCOLOR_MSGBOX:         // Message box    
         break;
         case CTLCOLOR_SCROLLBAR:   // Scroll-bar control 
         break;
         case CTLCOLOR_STATIC:             // Static control  
         break;
         default:
         break;
     }    
     return CWnd::OnCtlColor(pDC, pWnd, nCtlColor);
} 
posted @ 2020-12-02 13:34  宇宙之外  阅读(1143)  评论(0编辑  收藏  举报