Common Dialog and Controls Introduction
Contents:
1. Common Controls
(i) Button
(ii) Edit / Static Text
(iii) Check Box
(iv) Combo Box
2. Common Dialog
3. Modal / Modeless
4. Child Window
Preface
Key concept: All Controls Are Window.
Common Controls
Remark: GetDlgItem, DDX/DDV, Message Map
1. Button:
(i) ON_BN_CLIECKED(Control ID, Function)
in your header file, may find something like following:
BEGIN_MESSAGE_MAP(CClass3Dlg, CDialog)ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
ON_BN_CLICKED(IDC_BUTTON1, OnBnClickedButton1)
ON_BN_CLICKED(IDC_BUTTON2, OnBnClickedButton2)
ON_BN_CLICKED(IDC_BUTTON3, OnBnClickedButton3)
ON_BN_CLICKED(IDC_BUTTON4, OnBnClickedButton4)
ON_BN_CLICKED(IDC_BUTTON5, OnBnClickedButton5)
ON_BN_CLICKED(IDC_BUTTON6, OnBnClickedButton6)
ON_BN_CLICKED(IDC_BUTTON7, OnBnClickedButton7)
ON_WM_DESTROY()
ON_BN_CLICKED(IDC_BUTTON8, OnBnClickedButton8)
END_MESSAGE_MAP()
(ii) See WM_COMMAND and BN_CLICKED in MSDN.
(iii) When you click a button, the child window control (button) sends WM_COMMAND message to its parent window (Main window). And BN_CLICKED (notification code) is in HIWORD of WParam.
- LOWORD(wParam) Child window ID
- HIWORD(wParam) Notification code
- lParam Child window Handle
2. Static Text:
(i) For Showing text
3. Edit Control:
(i) For inputting text
(ii) Multi-Line / Want Return
(iii) Controlling it like window
4. Check Box:
(i) For Boolean
Common Dialogs
1. CFileDialog: Open/Save file
2. CFontDialog: Choose font type and style
3. CColorDialog: Choose color
4. CPrintDialog: Set printer
Modal / Modeless
1. Modal (DoModal)
(i) Loading the dialog resource
(ii) Disabling (freezing) parent and stopping it from getting any messages.
(iii) Creating and displaying - RunModalLoop
(iv) Destroy window after user hit “OK” or “Cancel”.
code like following:
CDemo demo; // CDemo inherts CDialog
if(IDOK == demo.DoModal())
{
CString tmp;
tmp.Format(TEXT(" edit1 = %sn edit2 = %dn check = %dn combo = %sn"),
demo.m_sEdit1, demo.m_nEdit2, demo.m_bCheck, demo.m_sCombo);
MessageBox(tmp);
}// if(IDOK == demo.DoModal())
2. Modeless
(i) Using new operator and then call CDialog::Create() to initialize and display with ShowWindow(SW_SHOW).
(ii) Using EndDialog() to terminate (not destroy or delete) modeless dialog.
(iii) Destroying and deleting it finally.
code like following:
show dialog:
if(about == 0)
{
about = new CAboutDlg();
about->Create(IDD_ABOUTBOX);
}
about->ShowWindow(SW_SHOW);
destroy dialog:
if(about != 0){
about->EndDialog(0);
BOOL B = about->DestroyWindow();
delete about;
about = 0;
}
ChildWindow
1. Remember it: All Controls Are Child Windows.
2. If you want to create a window to embed it into a window (parent window).
3. How to embed a window in the other.
(i) Add a FORMVIEW into resource and create a class for it.
(ii) Generate instance with new operator and call Create to initial it.
(iii) Move the window to specific location.
(iv) Show it!!!!
code like following:
child = new CTestChild(this);
child->Create(IDD_FORMVIEW, this);
RECT rect = {0}, rect1 = {0};
this->GetClientRect(&rect);
child->GetWindowRect(&rect1);
int w = rect1.right - rect1.left;
int h = rect1.bottom - rect1.top;
rect1.top = rect.bottom - h - 5;
rect1.bottom = rect1.top + h;
child->MoveWindow(&rect1);
child->ShowWindow(SW_SHOW);
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