学步园

DLG_LINE
{
type=EEikCtEdwin;
id=EMyQuery;

    control=EDWIN { maxlength=15; };
}
...
void CTestDlgDialog::PrepareLC(TInt aResourceId)
{
CEikDialog::PrepareLC( aResourceId );
// Dialog base class can be CAknDialog   

//CAknDialog::PrepareLC( aResourceId );
// Pick up the Editor control from the dialog
CEikEdwin* control = static_cast<CEikEdwin*>(ControlOrNull(EMyQuery));
// Set the input mode
control->SetAknEditorInputMode(EAknEditorNumericInputMode);
// Restrict the other input modes
control->SetAknEditorAllowedInputModes(EAknEditorNumericInputMode);
}

上面的示例提供给用户一个可以输入足够位数数字的对话框。
但是它也允许用户输入"*#pw+"这样的字符——通过使用"*"或
"#"键，我们可以监控用户的按键输入来避免用户输入这些字符。
还可以显示一个警告框提示用户的非法输入。

Or

---

RESOURCE DIALOG r_demo_data_query
{
flags = EGeneralQueryFlags;
buttons = R_AVKON_SOFTKEYS_OK_CANCEL;
items =
{
DLG_LINE
{
type = EAknCtQuery;
id = EGeneralQuery;
control = AVKON_DATA_QUERY
{
layout = EDataLayout;
label = ""; // prompt text
control = EDWIN
{
width = 5;
lines = 1;
maxlength = 15;
allowed_input_modes = EAknEditorNumericInputMode;
default_input_mode = EAknEditorNumericInputMode;
};
};
}
};
}

// The descriptor used for the editor
TBuf<128> text;
// The descriptor contained the prompt text for the query. The prompt // text can also be defined in the resource structure of the query
TBuf<128> prompt(_L("Enter data:"));
// create dialog instance
CAknTextQueryDialog* dlg =
new( ELeave ) CAknTextQueryDialog( text, prompt );
// Prepares the dialog, constructing it from the specified resource
dlg->PrepareLC( R_DEMO_DATA_QUERY );
// Sets the maximum length of the text editor
dlg->SetMaxLength(10);
// Launch the dialog
if (dlg->RunLD())
{
// ok pressed, text is the descriptor containing the entered text // in the editor.
}