如何有效的使用对话框？译者：徐景周(原作：VGirish)
Q:如何在对话框中加入工具条 在 OnInitDialog 中加入下面代码：
BOOL CYourDlg::OnInitDialog() { CDialog::OnInitDialog(); // Create the toolbar. To understand the meaning of the styles used, you // can take a look at the MSDN for the Create function of the CToolBar class. ToolBar.Create(this, WS_CHILD | WS_VISIBLE | CBRS_TOP | CBRS_TOOLTIPS |CBRS_FLYBY | CBRS_BORDER_BOTTOM); // I have assumed that you have named your toolbar's resource as IDR_TOOLBAR1. // If you have given it a different name, change the line below to accomodate // that by changing the parameter for the LoadToolBar function. ToolBar.LoadToolBar(IDR_TOOLBAR1); CRect rcClientStart; CRect rcClientNow; GetClientRect(rcClientStart); // To reposition and resize the control bar RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST,0, reposQuery, rcClientNow); CPoint ptOffset(rcClientNow.left - rcClientStart.left,rcClientNow.top-rcClientStart.top); CRect rcChild; CWnd* pwndChild = GetWindow(GW_CHILD); while (pwndChild) { pwndChild->GetWindowRect(rcChild); ScreenToClient(rcChild); rcChild.OffsetRect(ptOffset); pwndChild->MoveWindow(rcChild, FALSE); pwndChild = pwndChild->GetNextWindow(); } CRect rcWindow; GetWindowRect(rcWindow); rcWindow.right += rcClientStart.Width() - rcClientNow.Width(); rcWindow.bottom += rcClientStart.Height() - rcClientNow.Height(); MoveWindow(rcWindow, FALSE); // And position the control bars RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST, 0); return TRUE; // return TRUE unless you set the focus to a control }
Q:如何改变对话框的形状？ 可用下面一些涵数： CreatePolygonRgn CreateRectRgn CreateRoundRectRgn 等.
CRgn m_rgn; // Put this in your dialog's header file. i.e. a member variable // This Gets the size of the Dialog: This piece of code is to be placed in the // OnInitDialog Function of your dialog. CRect rcDialog GetClientRect(rcDialog); // The following code Creates the area and assigns it to your Dialog m_rgn.CreateEllipticRgn(0, 0, rcDialog.Width(), rcDialogHeight()); SetWindowRgn(GetSafeHwnd(), (HRGN) m_rgn, TRUE);Q：如何实现非客户区移动？ 可用下面二种方法：
// Handler for WM_LBUTTONDOWN message void CYourDialog::OnLButtonDown(UINT nFlags, CPoint point) { CDialog::OnLButtonDown(nFlags, point); PostMessage( WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM( point.x, point.y)); } // Handler for WM_NCHITTEST message LONG CYourDialog::OnNcHitTest( UINT uParam, LONG lParam ) { int xPos = LOWORD(lParam); int yPos = HIWORD(lParam); UINT nHitTest = CDialog::OnNcHitTest(CSize(xPos, yPos)); return (nHitTest == HTCLIENT) ? HTCAPTION : nHitTest; }
Q:如何使对话框初始为最小化状态？ 在 OnInitDialog 中加入下面代码：
SendMessage(WM_SYSCOMMAND, SC_MAXIMIZE, NULL);Q:如何限定对话框大小范围？ 在 WM_SIZING中加入下面代码：
void CYourDialog::OnSizing(UINT fwSide, LPRECT pRect) { if(pRect->right - pRect->left <=200) pRect->right = pRect->left + 200; if(pRect->bottom - pRect->top <=200) pRect->bottom = pRect->top + 200; CDialog::OnSizing(fwSide, pRect); }
Q:如何在对话框中加入状态条？ 定义 CStatusBar 变量：
CStatusBar m_StatusBar;定义状态条指定状态：
static UINT BASED_CODE indicators[] = { ID_INDICATOR_CAPS, ID_INDICATOR_NUM };在 OnInitDialog 中加入下面代码：
m_StatusBar.CreateEx(this,SBT_TOOLTIPS,WS_CHILD|WS_VISIBLE|CBRS_BOTTOM,AFX_IDW_STATUS_BAR); // Set the indicators namely caps and nums lock status m_StatusBar.SetIndicators(indicators,sizeof(indicators)/sizeof(UINT)); CRect rect; GetClientRect(&rect); m_StatusBar.SetPaneInfo(0,ID_INDICATOR_CAPS,SBPS_NORMAL,rect.Width()/2); m_StatusBar.SetPaneInfo(1,ID_INDICATOR_NUM,SBPS_STRETCH ,rect.Width()/2); RepositionBars(AFX_IDW_CONTROLBAR_FIRST,AFX_IDW_CONTROLBAR_LAST,ID_INDICATOR_NUM); m_StatusBar.GetStatusBarCtrl().SetBkColor(RGB(180,180,180));