Symbian 控件架构之对话框

核心提示：CAknQueryDialog头文件：AknQueryDialog.hlib：avkon.lib使用方法：Code:CAknQueryDialog* dlg;dlg = CAknQueryDialog::NewL( CAknQueryDialog::ENoTone );dlg->PrepareLC( R_RESO

CAknQueryDialog

头文件：AknQueryDialog.h

lib：avkon.lib

使用方法：

Code:

CAknQueryDialog* dlg;

dlg = CAknQueryDialog::NewL( CAknQueryDialog::ENoTone );

dlg->PrepareLC( R_RESOURCE_QUERY_DIALOG ); //从资源文件构造对话框，资源见下面的定义

TInt ret = dlg->RunLD(); //若用户选择“是”，返回非0，选择“否”，则返回0

RESOURCE DIALOG R_RESOURCE_QUERY_DIALOG //询问对话框资源

{

flags = EGeneralQueryFlags;

buttons = R_AVKON_SOFTKEYS_YES_NO; //CBA显示“是”和“否”两个按钮

items =

{

DLG_LINE

{

type = EAknCtQuery;

id = EGeneralQuery;

control = AVKON_CONFIRMATION_QUERY //表示这是confirm询问对话框，用户选择“是”或“否”

{

layout = EConfirmationQueryLayout;

label = "对话框中显示的文字";

};

}

};

}

此类对话框可以有声音提示，由NewL的const TTone& aTone参数指定，可能的值如下：

Code:

enum TTone {

/// No tone is played

ENoTone = 0,

/// A confirmation tone is played

EConfirmationTone = EAvkonSIDConfirmationTone,

/// A warning tone is played

EWarningTone = EAvkonSIDWarningTone,

/// An error tone is played

EErrorTone = EAvkonSIDErrorTone

};

通过定义不同的询问对话框资源，可实现不同的询问对话框，如让用户输入文字的询问对话框资源定义如下：

Code:

RESOURCE DIALOG R_RESOURCE_DATA_QUERY

{

flags = EGeneralQueryFlags;

buttons = R_AVKON_SOFTKEYS_OK_CANCEL; //CBA按钮显示“确定”和“取消”

items =

{

DLG_LINE

{

type = EAknCtQuery;

id = EGeneralQuery;

control = AVKON_DATA_QUERY //表示这是data询问对话框，需要用户输入内容