6. 改变鼠标外形
添加 WM_SETCURSOR 消息映射函数
BOOL CTest6Dlg::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
SetCursor(AfxGetApp()->LoadStandardCursor(IDC_HELP));
return 0;
} |
7. 改变对话框背景色和文本颜色
在CTest6App的InitInstance中添加SetDialogBkColor（RGB（255，0，0）， RGB（0，255，0））；
8. 改变对话框caption上的图标
导入自己的图标资源到工程中，把原来ID为 IDR_MAINFRAME 的资源删除，把新的图标的ID命名为IDR_MAINFRAME
9. 在主对话框显示前，显示一个login对话框
|
BOOL CTest6App::InitInstance()
{
//...
int nResponse;
CLoginDlg loginDlg; [Page]
nResponse = loginDlg.DoModal();
if (nResponse == IDOK)
{
}
if (nResponse == IDCANCEL)
{
return FALSE;
}
CTest6Dlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK )
{
}
else if (nResponse == IDCANCEL)
{
}
return FALSE;
} |
然后重载CLoginDlg对话框的哦OnOK（），在其中判断条件
void CLoginDlg::OnOK()
{
if (条件满足)
CDialog::OnOK();
else
AfxMessageBox(_T(\"invalid password!\"));
} |
10. 在对话框中添加工具栏
添加以下代码到 OnInitDialog 中
if ( !m_wndToolBar.Create(this) || !m_wndToolBar.LoadToolBar(IDR_TOOLBAR1) )
{
TRACE0(\"Failed to Create Dialog Toolbar\\n\");
EndDialog(IDCANCEL);
}
CRect rcClientOld; // 久客户区RECT
CRect rcClientNew; // 加入TOOLBAR后的CLIENT RECT [Page]
GetClientRect(rcClientOld); //
// Called to reposition and resize control bars in the client area of a window
// The reposQuery FLAG does not really traw the Toolbar. It only does the calculations.
// And puts the new ClientRect values in rcClientNew so we can do the rest of the Math.
//重新计算RECT大小
RepositionBars(AFX_IDW_CONTROLBAR_FIRST,
AFX_IDW_CONTROLBAR_LAST,
0,
reposQuery,
rcClientNew);
// All of the Child Windows (Controls) now need to be moved so the Tollbar does not cover
them up.
//所有的子窗口将被移动，以免被TOOLBAR覆盖
// Offest to move all child controls after adding Tollbar
//计算移动的距离
CPoint ptOffset(rcClientNew.left-rcClientOld.left,
rcClientNew.top-rcClientOld.top);
CRect rcChild;
CWnd* pwndChild = GetWindow(GW_CHILD); //得到子窗口
while(pwndChild) // 处理所有子窗口
{
//移动所有子窗口
pwndChild->GetWindowRect(rcChild);
ScreenToClient(rcChild); [Page]
rcChild.OffsetRect(ptOffset);
pwndChild->MoveWindow(rcChild,FALSE);
pwndChild = pwndChild->GetNextWindow();
}
CRect rcWindow;
GetWindowRect(rcWindow); // 得到对话框RECT
rcWindow.right += rcClientOld.Width() - rcClientNew.Width(); // 修改对话框尺寸
rcWindow.bottom += rcClientOld.Height() - rcClientNew.Height();
MoveWindow(rcWindow,FALSE); // Redraw Window
RepositionBars(AFX_IDW_CONTROLBAR_FIRST,AFX_IDW_CONTROLBAR_LAST,0); |
11.响应对话框的最大化、最小化、关闭、恢复事件
方法一：添加 WM_SYSCOMMAND 消息映射函数
void CTest6Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ( (nID & 0xFFF0) == IDM_ABOUTBOX )
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
if ( nID == SC_MAXIMIZE )
{
AfxMessageBox(_T(\"最大化\"));
}
else if ( nID == SC_MINIMIZE )
{
AfxMessageBox(_T(\"最小化\")); [Page]
}
else if ( nID == SC_CLOSE )
{
AfxMessageBox(_T(\"关闭\"));
}
CDialog::OnSysCommand(nID, lParam);
} |
方法二：添加 WM_SIZE 消息映射函数
void CTest6Dlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);
if ( nType == SIZE_MAXIMIZED )
{
AfxMessageBox(_T(\"最大化\"));
}
else if ( nType == SIZE_MINIMIZED )
{
AfxMessageBox(_T(\"最小化\"));
}
else if ( nType == SIZE_RESTORED )
{
AfxMessageBox(_T(\"恢复\"));
}
} |
12.代码实现窗口最小化，最大化，关闭
PostMessage（WM_SYSCOMMAND， SC_MINIMIZE）；
PostMessage（WM_SYSCOMMAND， SC_MAXIMIZE）；
PostMessage（WM_SYSCOMMAND， SC_CLOSE）；
13.按下ESC和ENTER键时禁止关闭对话框
方法一：
（1） 重载OnCancel和OnOk，屏蔽其中的CDialog：：OnCancel（）和CDialog：：OnOk（）；
（2） 添加以下代码
|
void CTest6Dlg::OnSysCommand(UINT nID, LPARAM lParam) [Page]
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout; //if you have an about dialog
dlgAbout.DoModal();
}
else if ((nID & 0xFFF0) == SC_CLOSE)
{
//用户点击右上角\"X\"
EndDialog(IDOK);
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
} | 方法二：
BOOL CTest6Dlg::PreTranslateMessage(MSG* pMsg)
{
if ( pMsg->message == WM_KEYDOWN )
{
switch(pMsg->wParam)
{
case VK_ESCAPE:
return TRUE; //直接返回TRUE
break;
case VK_RETURN:
return TRUE; [Page]
break;
}
}
return CDialog::PreTranslateMessage(pMsg);
}
|
14.在对话框中处理键盘鼠标消息
处理PreTranslateMessage消息
以下代码示例只演示了键盘WM_KEYDOWN消息，你也可以处理鼠标消息，比如
WM_LBUTTONDOWN，WM_LBUTTONUP，WM_RBUTTONDOWN等。
|
BOOL CTest6Dlg::PreTranslateMessage(MSG* pMsg)
{
/**********************************************************/
/* 当焦点在combobox(drop down风格)的edit上,响应回车 */
/***********************************************************/
if ( pMsg->message == WM_KEYDOWN )
{
switch( pMsg->wParam )
{
case VK_RETURN:
CEdit *pEdit = (CEdit*)m_combo1.GetWindow(GW_CHILD);
if(pMsg->hwnd == pEdit->m_hWnd )
{
AfxMessageBox(\"在combobox的edit中按下了Enter!\");
}
return TRUE; [Page]
}
}
/****************************************/
/* ALT为WM_SYSKEYDOWN */
/****************************************/
if( pMsg->message == WM_SYSKEYDOWN )
{
switch( pMsg->wParam )
{
case VK_F1:
if(::GetKeyState(VK_MENU) < 0)//ALT+F1
{
AfxMessageBox(\"按下了ALT+F1\");
return TRUE;
}
}
}
/****************************************/
/* 在clistctrl中按ctrl+A选中所有项 */
/****************************************/
if( pMsg->message == WM_KEYDOWN )
{
if(pMsg->hwnd == GetDlgItem(IDC_LIST1)->m_hWnd)
{
switch( pMsg->wParam )
{
case 65://A
if(::GetKeyState(VK_CONTROL) < 0)//Shift+enter [Page]
{
for(int i=0; i<m_list.GetItemCount(); i++)
{
m_list.SetItemState(i, LVIS_SELECTED|LVIS_FOCUSED,
LVIS_SELECTED|LVIS_FOCUSED);
}
}
return TRUE;
}
}
}
/****************************************/
/* 当焦点在combobox,弹出自定义菜单 */
/****************************************/
if(pMsg->message == WM_RBUTTONDOWN)
{
CEdit *pEdit = (CEdit*)m_combo1.GetWindow(GW_CHILD);
if(pMsg->hwnd == pEdit->m_hWnd)
{
DWORD dwPos = GetMessagePos();
CPoint point( LOWORD(dwPos), HIWORD(dwPos) );
ScreenToClient(&point);
ClientToScreen(&point); [Page]
CMenu menu;
VERIFY( menu.LoadMenu( IDR_MENU1 ) );
CMenu* popup = menu.GetSubMenu(0);
ASSERT( popup != NULL );
popup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, this );
}
}
return CDialog::PreTranslateMessage(pMsg);
} |
15.对话框启动即隐藏
添加 WM_SHOWWINDOW 的消息映射
void CTest6Dlg::OnShowWindow(BOOL bShow, UINT nStatus)
{
if ( GetStyle() & WS_VISIBLE )
{
CDialog::OnShowWindow(bShow, nStatus);
}
else
{
long Style = ::GetWindowLong(*this, GWL_STYLE);
::SetWindowLong(*this, GWL_STYLE, Style | WS_VISIBLE);
CDialog::OnShowWindow(SW_HIDE, nStatus);
}
} |
16.对话框自动停靠在屏幕边
const int DETASTEP = 50;
BOOL AdjustPos(CWnd *pWnd, CRect* lpRect)
{
//自动靠边 [Page]
int iSX = GetSystemMetrics(SM_CXFULLSCREEN);
int iSY = GetSystemMetrics(SM_CYFULLSCREEN);
RECT rWorkArea;
BOOL bResult = SystemParametersInfo(SPI_GETWORKAREA, sizeof(RECT), &rWorkArea, 0);
CRect rcWA;
if ( !bResult )
{
//如果调用不成功就利用GetSystemMetrics获取屏幕面积
rcWA = CRect(0,0,iSX,iSY);
}
else
rcWA = rWorkArea;
int iX = lpRect->left;
int iY = lpRect->top;
if ( iX < rcWA.left + DETASTEP && iX!=rcWA.left )
{
//调整左
pWnd->SetWindowPos(NULL,rcWA.left,iY,0,0,SWP_NOSIZE);
lpRect->OffsetRect(rcWA.left-iX,0);
AdjustPos(lpRect);
return TRUE;
}
if ( iY < rcWA.top + DETASTEP && iY!=rcWA.top )
{
//调整上
pWnd->SetWindowPos(NULL ,iX,rcWA.top,0,0,SWP_NOSIZE);
lpRect->OffsetRect(0,rcWA.top-iY); [Page]
AdjustPos(lpRect);
return TRUE;
}
if ( iX + lpRect->Width() > rcWA.right - DETASTEP && iX !=rcWA.right-lpRect->Width() )
{
//调整右
pWnd->SetWindowPos(NULL ,rcWA.right-rcW.Width(),iY,0,0,SWP_NOSIZE);
lpRect->OffsetRect(rcWA.right-lpRect->right,0);
AdjustPos(lpRect);
return TRUE;
}
if ( iY + lpRect->Height() > rcWA.bottom - DETASTEP && iY !=rcWA.bottom-lpRect->Height()
)
{
//调整下
pWnd->SetWindowPos(NULL ,iX,rcWA.bottom-rcW.Height(),0,0,SWP_NOSIZE);
lpRect->OffsetRect(0,rcWA.bottom-lpRect->bottom);
return TRUE;
}
return FALSE;
}
//然后在ONMOVEING事件中使用如下过程调用
CRect r=*pRect;
AdjustPos(this, &r);
*pRect=(RECT)r; |
17.单击窗口任意位置都可拖动窗口
方法一：
添加 WM_LBUTTONDOWN 的消息映射
void CTest6Dlg::OnLButtonDown(UINT nFlags, CPoint point)
{
PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, 0); [Page]
CDialog::OnLButtonDown(nFlags, point);
} |
方法二：
添加 WM_NCHITTEST 的消息映射
注意：在classwizard->message中找不到WM_NCHITTEST的，需要在选项卡class info->message filter中选择window后该消息才会出现在message中。
void CTest6Dlg::OnNCHitTest(CPoint point)
{
return HTCAPTION;
// return CDialog::OnNCHitTest(point);
} | 18.用Enter键替换Tab键实现焦点切换
BOOL CTest6Dlg::PreTranslateMessage(MSG* pMsg)
{
if ( pMsg->message == WM_KEYDOWN )
{
if ( pMsg->wParam == VK_RETURN )
pMsg->wParam = VK_TAB;
}
return CDialog::PreTranslateMessage(pMsg);
} | ...... Please access the below link to view the full content. |
