DuiLib（4）——消息响应

Duilib类似MFC的消息响应如下：

DUI_DECLARE_MESSAGE_MAP()

DUI_BEGIN_MESSAGE_MAP(CYmChatUI, CXMLWnd)
DUI_ON_MSGTYPE(DUI_MSGTYPE_CLICK, OnClick)
DUI_END_MESSAGE_MAP()

绑定消息响应函数：DUI_ON_MSGTYPE(DUI_MSGTYPE_CLICK, OnClick)

其他的消息类型如下，用法雷同：

#define DUI_MSGTYPE_MENU                   (_T("menu"))
#define DUI_MSGTYPE_LINK                   (_T("link"))

#define DUI_MSGTYPE_TIMER                  (_T("timer"))
#define DUI_MSGTYPE_CLICK                  (_T("click"))

#define DUI_MSGTYPE_RETURN                 (_T("return"))
#define DUI_MSGTYPE_SCROLL                 (_T("scroll"))

#define DUI_MSGTYPE_DROPDOWN               (_T("dropdown"))
#define DUI_MSGTYPE_SETFOCUS               (_T("setfocus"))

#define DUI_MSGTYPE_KILLFOCUS              (_T("killfocus"))
#define DUI_MSGTYPE_ITEMCLICK 		   	   (_T("itemclick"))
#define DUI_MSGTYPE_TABSELECT              (_T("tabselect"))

#define DUI_MSGTYPE_ITEMSELECT 		   	   (_T("itemselect"))
#define DUI_MSGTYPE_ITEMEXPAND             (_T("itemexpand"))

#define DUI_MSGTYPE_WINDOWINIT             (_T("windowinit"))
#define DUI_MSGTYPE_BUTTONDOWN 		   	   (_T("buttondown"))
#define DUI_MSGTYPE_MOUSEENTER			   (_T("mouseenter"))
#define DUI_MSGTYPE_MOUSELEAVE			   (_T("mouseleave"))

#define DUI_MSGTYPE_TEXTCHANGED            (_T("textchanged"))
#define DUI_MSGTYPE_HEADERCLICK            (_T("headerclick"))
#define DUI_MSGTYPE_ITEMDBCLICK            (_T("itemdbclick"))
#define DUI_MSGTYPE_SHOWACTIVEX            (_T("showactivex"))

#define DUI_MSGTYPE_ITEMCOLLAPSE           (_T("itemcollapse"))
#define DUI_MSGTYPE_ITEMACTIVATE           (_T("itemactivate"))
#define DUI_MSGTYPE_VALUECHANGED           (_T("valuechanged"))

#define DUI_MSGTYPE_SELECTCHANGED 		   (_T("selectchanged"))

也可以具体到是什么事件，什么控件，映射到某个函数

//定义消息类型--执行函数宏
#define DUI_ON_MSGTYPE(msgtype, memberFxn)                                \
{ msgtype, _T(""), DuiSig_vn, (DUI_PMSG)&memberFxn},                  \
//定义消息类型--控件名称--执行函数宏
#define DUI_ON_MSGTYPE_CTRNAME(msgtype,ctrname,memberFxn)                 \
{ msgtype, ctrname, DuiSig_vn, (DUI_PMSG)&memberFxn },                \
//定义click消息的控件名称--执行函数宏
#define DUI_ON_CLICK_CTRNAME(ctrname,memberFxn)                           \
{ DUI_MSGTYPE_CLICK, ctrname, DuiSig_vn, (DUI_PMSG)&memberFxn },      \
//定义selectchanged消息的控件名称--执行函数宏
#define DUI_ON_SELECTCHANGED_CTRNAME(ctrname,memberFxn)                   \
{ DUI_MSGTYPE_SELECTCHANGED,ctrname,DuiSig_vn,(DUI_PMSG)&memberFxn }, \
//定义killfocus消息的控件名称--执行函数宏
#define DUI_ON_KILLFOCUS_CTRNAME(ctrname,memberFxn)                       \
{ DUI_MSGTYPE_KILLFOCUS,ctrname,DuiSig_vn,(DUI_PMSG)&memberFxn },     \
//定义menu消息的控件名称--执行函数宏
#define DUI_ON_MENU_CTRNAME(ctrname,memberFxn)                            \
{ DUI_MSGTYPE_MENU,ctrname,DuiSig_vn,(DUI_PMSG)&memberFxn },          \
//定义与控件名称无关的消息宏
//定义timer消息--执行函数宏
#define DUI_ON_TIMER()                                                    \
{ DUI_MSGTYPE_TIMER, _T(""), DuiSig_vn,(DUI_PMSG)&OnTimer },          \

我们也可以在下面的虚函数中写消息响应

virtual void Notify(TNotifyUI& msg);

举例如下：

void CYmChatUI::Notify(TNotifyUI& msg)
{
if (msg.sType == _T("click"))
{
if (_tcsicmp(msg.pSender->GetName(), _T("signaturetip")) == 0) {
AfxMessageBox(L"点击了name为signaturetip的控件");
}
}
__super::Notify(msg);
}

在WindowImplBase这个基类文件中，已经实现了一些常用按钮的响应

比如，最大化，最小化等按钮，只要这些按钮的名字与类中定义的一样即可

（minbtn，maxbtn，restorebtn，closebtn）

而且，WindowImplBase也实现了一些常规消息的响应函数，我们只要继承即可

如下：

//点击事件
virtual void OnClick(TNotifyUI& msg);
//关闭窗口事件
virtual LRESULT OnClose(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//销毁窗口事件
virtual LRESULT OnDestroy(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//窗口尺寸改变时响应此事件
virtual LRESULT OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
//拦截字符响应
virtual LRESULT OnChar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
//拦截系统消息响应
virtual LRESULT OnSysCommand(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
//窗口创建时响应
virtual LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
//键盘按下时响应
virtual LRESULT OnKeyDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//失去焦点时响应
virtual LRESULT OnKillFocus(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//获得焦点时响应
virtual LRESULT OnSetFocus(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//左键按下响应
virtual LRESULT OnLButtonDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//左键抬起响应
virtual LRESULT OnLButtonUp(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//鼠标移动响应
virtual LRESULT OnMouseMove(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//鼠标滚轮响应
virtual LRESULT OnMouseWheel(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled);
//鼠标放在控件上响应
virtual LRESULT OnMouseHover(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);

一、OnClick

void CYmChatUI::OnClick(TNotifyUI& msg)
{
// 获取产生消息的控件名称
CDuiString msgName = msg.pSender->GetName();
if (_tcsicmp(msgName, _T("friendbtn")) == 0)
{
AfxMessageBox(L"点击了朋友");
}
else if (_tcsicmp(msgName, _T("groupbtn")) == 0) {
AfxMessageBox(L"点击了群组");
}
__super::OnClick(msg);
}

二、OnChar

LRESULT CYmChatUI::OnChar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"您按了键盘上的%c键", wParam);
AfxMessageBox(strTip);
return __super::OnChar(uMsg, wParam, lParam, bHandled);
}

三、OnClose（窗口要关闭时响应，如按了ESC，或者关闭按钮，或者异常退出时）

LRESULT CYmChatUI::OnClose(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
AfxMessageBox(L"窗口即将关闭");
return __super::OnClose(uMsg, wParam, lParam, bHandled);
}

四、OnDestroy（在OnClose之后，会销毁窗口）

LRESULT CYmChatUI::OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
AfxMessageBox(L"窗口即将销毁");//发生在OnClose之后
return __super::OnDestroy(uMsg, wParam, lParam, bHandled);
}

五、OnCreate

LRESULT CYmChatUI::OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
AfxMessageBox(L"窗口即将创建,马上显示");//发生在窗口显示出来之前的一霎那
return __super::OnCreate(uMsg, wParam, lParam, bHandled);
}

六、OnKeyDown

LRESULT CYmChatUI::OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"您按了键盘上的%c键", LOWORD(wParam));//如果按了ESC，窗口会退出异常，不知道为什么
AfxMessageBox(strTip);
return __super::OnChar(uMsg, wParam, lParam, bHandled);
}

七、OnSize

LRESULT CYmChatUI::OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip = _T("窗口大小改变了");
AfxMessageBox(strTip);
return __super::OnSize(uMsg, wParam, lParam, bHandled);
}

八、OnLButtonDown

LRESULT CYmChatUI::OnLButtonDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"鼠标位置x=%d，y=%d",HIWORD(lParam), LOWORD(lParam));
AfxMessageBox(strTip);
return __super::OnLButtonDown(uMsg, wParam, lParam, bHandled);
}

九、OnLButtonUp

LRESULT CYmChatUI::OnLButtonUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"鼠标位置x=%d，y=%d", HIWORD(lParam), LOWORD(lParam));
AfxMessageBox(strTip);
return __super::OnLButtonDown(uMsg, wParam, lParam, bHandled);
}

十、OnMouseMove

LRESULT CYmChatUI::OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"鼠标位置x=%d，y=%d", HIWORD(lParam), LOWORD(lParam));
AfxMessageBox(strTip);
return __super::OnMouseMove(uMsg, wParam, lParam, bHandled);
}

十一、OnMouseWheel

LRESULT CYmChatUI::OnMouseWheel(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"鼠标滚动位置x=%d，y=%d", HIWORD(lParam), LOWORD(lParam));
AfxMessageBox(strTip);
return __super::OnMouseWheel(uMsg, wParam, lParam, bHandled);
}

十二、OnMouseHover

LRESULT CYmChatUI::OnMouseHover(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
CString strTip;
strTip.Format(L"鼠标停留的位置x=%d，y=%d", HIWORD(lParam), LOWORD(lParam));
AfxMessageBox(strTip);
return __super::OnMouseHover(uMsg, wParam, lParam, bHandled);
}

十三、OnSysCommand

LRESULT CYmChatUI::OnSysCommand(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
AfxMessageBox(L"触发了系统消息");
return __super::OnSysCommand(uMsg, wParam, lParam, bHandled);
}

十四、ResponseDefaultKeyEvent

LRESULT CYmChatUI::ResponseDefaultKeyEvent(WPARAM wParam)
{
CString strTip;
strTip.Format(L"点击了冷门按键%d，如ESC，ENTER", wParam);
AfxMessageBox(strTip);
return __super::ResponseDefaultKeyEvent(wParam);
}