Win32 对话框(3)

4.14 如何改变对话框的背景颜色

1. OnCtlColor
2. CTLCOLOR_DLG

HBRUSH CDemoDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
    HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

    //改变对话框的背景颜色
    if (nCtlColor == CTLCOLOR_DLG)                        
    {
        hbr = m_hBrush;
    }
    
    return hbr;
}

4.15 如何改变对话框中控件的颜色

根据控件Id更改,这个事件一直触发

HBRUSH CDemoDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
    HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
    
    if (pWnd->GetDlgCtrlID() == IDC_EDIT)                        
    {
        //设置文本前景色和背景色
        pDC->SetTextColor(RGB(0xFF, 0x00, 0x00));
        pDC->SetBkColor(RGB(0x99, 0xCC, 0xFF));

        return m_hBrush;
    }
    
    return hbr;
}

4.16 如何在对话框中输出文本

在OnPaint事件中使用CPaintDC的TextOut方法

void CDemoDlg::OnPaint() 
{
    if (IsIconic())
    {
    }
    else
    {
        //获得客户区大小
        CRect rect;
        GetClientRect(rect);

        CPaintDC dc(this);

        //设置背景模式
        dc.SetBkMode(TRANSPARENT);

        //设置文本对齐方式
        dc.SetTextAlign(TA_CENTER | TA_BASELINE);
    
        //输出文本
        dc.TextOut(rect.Width() / 2, rect.Height() / 2, _T("Hello World!"));
    
        CDialog::OnPaint();
    }
}

4.17 如何在对话框中加载菜单

使用CMenu对象的LoadMenu方法加载资源,然后调用SetMenu方法设置菜单

//加载菜单资源
m_Menu.LoadMenu(IDR_MENU);

//设置当前菜单
SetMenu(&m_Menu);

4.18 如何在对话框中加载工具栏

使用CToolBar相关方法

//创建工具栏
if (!m_wndToolBar.Create(this))
{
    return FALSE;
}

//加载工具栏资源
if (!m_wndToolBar.LoadToolBar(IDR_TOOLBAR))
{
    return FALSE;
}

//获得旧客户区坐标
CRect rcOldClient;
GetClientRect(rcOldClient);                            

//获得新客户区坐标
CRect rcNewClient;
RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST, 
    0, reposQuery, rcNewClient);                                

//移动主窗口
CRect rcMain;
GetWindowRect(rcMain);
rcMain.right += rcOldClient.Width() - rcNewClient.Width();
rcMain.bottom += rcOldClient.Height() - rcNewClient.Height();
MoveWindow(rcMain, FALSE);    

//移动所有子窗口
CRect rcChild;
CPoint point(rcNewClient.left - rcOldClient.left, rcNewClient.top - rcOldClient.top);
CWnd* pChildWnd = GetWindow(GW_CHILD);
while (pChildWnd != NULL)
{
    pChildWnd->GetWindowRect(rcChild);
    ScreenToClient(rcChild);
    rcChild.OffsetRect(point);
    pChildWnd->MoveWindow(rcChild, FALSE);
    pChildWnd = pChildWnd->GetNextWindow();
}

//重新定位工具栏
RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST, 0);

4.19 如何在对话框中加载状态栏

类似的,使用CStatusBar

//创建状态栏窗口
if (!m_wndStatusBar.Create(this))
{
    return -1;
}

//ID数组
UINT IDArray[2];
for (int n = 0; n < 2; n++)
{
    IDArray[n] = 10000 + n;
}

//设置状态栏指示器
m_wndStatusBar.SetIndicators(IDArray, sizeof(IDArray) / sizeof(UINT));

//设置窗格宽度
m_wndStatusBar.SetPaneInfo(0, IDArray[0], SBPS_NORMAL, 100);
m_wndStatusBar.SetPaneInfo(1, IDArray[1], SBPS_STRETCH, 0);

//设置窗格文本
m_wndStatusBar.SetPaneText(0, _T("状态栏："));
m_wndStatusBar.SetPaneText(1, _T(""));

//获得旧客户区坐标
CRect rcOldClient;
GetClientRect(rcOldClient);                            

//获得新客户区坐标
CRect rcNewClient;
RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST, 
    0, reposQuery, rcNewClient);                                

//移动主窗口
CRect rcMain;
GetWindowRect(rcMain);
rcMain.right += rcOldClient.Width() - rcNewClient.Width();
rcMain.bottom += rcOldClient.Height() - rcNewClient.Height();
MoveWindow(rcMain, FALSE);    

//移动所有子窗口
CRect rcChild;
CPoint point(rcNewClient.left - rcOldClient.left, rcNewClient.top - rcOldClient.top);
CWnd* pChildWnd = GetWindow(GW_CHILD);
while (pChildWnd != NULL)
{
    pChildWnd->GetWindowRect(rcChild);
    ScreenToClient(rcChild);
    rcChild.OffsetRect(point);
    pChildWnd->MoveWindow(rcChild, FALSE);
    pChildWnd = pChildWnd->GetNextWindow();
}

//重新定位状态栏
RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST, 0);

4.20 如何在对话框中加载视图