本文若有不對之處,敬請指出。
我們知道win32窗口程序的基本流程:
註冊窗口類 -> 創建窗口 —> 顯示窗口 -> 消息循環 -> 消息流轉
基於這個路線,我們來探索下duilib庫的實現。
毋庸置疑,先看一例測試程序中的WinMain函數:
CFrameWindowWnd* pFrame = new CFrameWindowWnd();
if( pFrame == NULL ) return 0;
pFrame->Create(NULL, _T("測試"), UI_WNDSTYLE_FRAME, WS_EX_WINDOWEDGE);
pFrame->ShowWindow(true);
CPaintManagerUI::MessageLoop();
可以確定註冊窗口類和創建窗口都在CFrameWindowWnd::Create中進行。其中CFrameWindowWnd的一個基類是CWindowWnd,進入到該類Create方法中:
HWND CWindowWnd::Create(HWND hwndParent, LPCTSTR pstrName, DWORD dwStyle, DWORD dwExStyle, int x, int y, int cx, int cy, HMENU hMenu)
{
if( GetSuperClassName() != NULL && !RegisterSuperclass() ) return NULL;
if( GetSuperClassName() == NULL && !RegisterWindowClass() ) return NULL;
m_hWnd = ::CreateWindowEx(dwExStyle, GetWindowClassName(), pstrName, dwStyle, x, y, cx, cy, hwndParent, hMenu, CPaintManagerUI::GetInstance(), this);
ASSERT(m_hWnd!=NULL);
return m_hWnd;
}
其中GetSuperClassName爲虛函數,用於指定要子類化的窗口類。關於窗口子類化的處理此處不予關注。
如果不需要子類化,則調用RegisterWindowClass進行窗口類註冊。進入該方法內,可以發現註冊窗的口過程是CWindowWnd::__WndProc;
註冊之後,調用API CreateWindowEx創建窗口。
創建窗口後,就該最關鍵的消息循環和消息路由了,here we go!
首先看看消息循環的處理CPaintManagerUI::MessageLoop:
[cpp] view plain copy
01.void CPaintManagerUI::MessageLoop()
02.{
03. MSG msg = { 0 };
04. while( ::GetMessage(&msg, NULL, 0, 0) ) {
05. if( !CPaintManagerUI::TranslateMessage(&msg) ) {
06. ::TranslateMessage(&msg);
07. ::DispatchMessage(&msg);
08. }
09. }
10.}
可以看出,任何消息都會經過CPaintManagerUI::TranslateMessage的過濾,如果該方法沒有處理消息,纔將消息路由給窗口過程。相當於MFC中的PreTranslateMessage。
然後我們看下CPaintManagerUI::TranslateMessage的實現:
[cpp] view plain copy
01.bool CPaintManagerUI::TranslateMessage(const LPMSG pMsg)
02.{
03. // Pretranslate Message takes care of system-wide messages, such as
04. // tabbing and shortcut key-combos. We'll look for all messages for
05. // each window and any child control attached.
06. HWND hwndParent = ::GetParent(pMsg->hwnd);
07. UINT uStyle = GetWindowStyle(pMsg->hwnd);
08. LRESULT lRes = 0;
09. for( int i = 0; i < m_aPreMessages.GetSize(); i++ ) {
10. CPaintManagerUI* pT = static_cast<CPaintManagerUI*>(m_aPreMessages[i]);
11. if( pMsg->hwnd == pT->GetPaintWindow()
12. || (hwndParent == pT->GetPaintWindow() && ((uStyle & WS_CHILD) != 0)) )
13. {
14. if( pT->PreMessageHandler(pMsg->message, pMsg->wParam, pMsg->lParam, lRes) ) return true;
15. }
16. }
17. return false;
18.}
m_aPreMessages 的定義爲:static CStdPtrArray m_aPreMessages; 當創建一個主窗口時,m_aPreMessages一般會有插入動作,因此,此數組是所有相關窗口attach的CPaintManagerUI對象地址的集合,處理的是整個程序的全局的消息。當msg消息路由至此處時,如果該窗口是子窗口或者消息窗口本身,就調用PreMessageHandler處理,如果仍未得到處理,則返回false,傳遞給窗口註冊的窗口消息處理。
接下來看看CPaintManagerUI::PreMessageHandler的實現:
[cpp] view plain copy
01.bool CPaintManagerUI::PreMessageHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& /*lRes*/)
02.{
03. for( int i = 0; i < m_aPreMessageFilters.GetSize(); i++ )
04. {
05. bool bHandled = false;
06. LRESULT lResult = static_cast<IMessageFilterUI*>(m_aPreMessageFilters[i])->MessageHandler(uMsg, wParam, lParam, bHandled);
07. if( bHandled ) {
08. return true;
09. }
10. }
11. switch( uMsg ) {
12. case WM_KEYDOWN:
13. {
14. // Tabbing between controls
15. if( wParam == VK_TAB ) {
16. if( m_pFocus && m_pFocus->IsVisible() && m_pFocus->IsEnabled() && _tcsstr(m_pFocus->GetClass(), _T("RichEditUI")) != NULL ) {
17. if( static_cast<CRichEditUI*>(m_pFocus)->IsWantTab() ) return false;
18. }
19. SetNextTabControl(::GetKeyState(VK_SHIFT) >= 0);
20. return true;
21. }
22. }
23. break;
24. case WM_SYSCHAR:
25. {
26. // Handle ALT-shortcut key-combinations
27. FINDSHORTCUT fs = { 0 };
28. fs.ch = toupper((int)wParam);
29. CControlUI* pControl = m_pRoot->FindControl(__FindControlFromShortcut, &fs, UIFIND_ENABLED | UIFIND_ME_FIRST | UIFIND_TOP_FIRST);
30. if( pControl != NULL ) {
31. pControl->SetFocus();
32. pControl->Activate();
33. return true;
34. }
35. }
36. break;
37. case WM_SYSKEYDOWN:
38. {
39. if( m_pFocus != NULL ) {
40. TEventUI event = { 0 };
41. event.Type = UIEVENT_SYSKEY;
42. event.chKey = (TCHAR)wParam;
43. event.ptMouse = m_ptLastMousePos;
44. event.wKeyState = MapKeyState();
45. event.dwTimestamp = ::GetTickCount();
46. m_pFocus->Event(event);
47. }
48. }
49. break;
50. }
51. return false;
52.}
這裏又新增了一個對象屬性:m_aPreMessageFilters,是一個窗口類(派生CWindowWnd)對象的集合。同時該對象的類必須是IMessageFilterUI和CWindowWnd的子類。通過這個集合,app將消息推送到每一個需要預處理所關心的消息的窗口,即調用MessageHandler,此方法是我們要重載的重要方法之一,用於對消息傳遞給窗口過程之前的預處理。接下來的是duilib提供的預處理,switch塊處理的是全局級消息,對其進行預處理,包括tab處理,alt組合鍵和系統按鍵消息。
必須要注意,CPaintManagerUI::MessageHandler爲我們提供了多數消息的默認實現。
至此,消息的預處理階段完成,回到CPaintManagerUI::MessageLoop,未處理的消息將傳遞給窗口過程:
[cpp] view plain copy
01.LRESULT CALLBACK CWindowWnd::__WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
02.{
03. CWindowWnd* pThis = NULL;
04. if( uMsg == WM_NCCREATE ) {
05. LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
06. pThis = static_cast<CWindowWnd*>(lpcs->lpCreateParams);
07. pThis->m_hWnd = hWnd;
08. ::SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LPARAM>(pThis));
09. }
10. else {
11. pThis = reinterpret_cast<CWindowWnd*>(::GetWindowLongPtr(hWnd, GWLP_USERDATA));
12. if( uMsg == WM_NCDESTROY && pThis != NULL ) {
13. LRESULT lRes = ::CallWindowProc(pThis->m_OldWndProc, hWnd, uMsg, wParam, lParam);
14. ::SetWindowLongPtr(pThis->m_hWnd, GWLP_USERDATA, 0L);
15. if( pThis->m_bSubclassed ) pThis->Unsubclass();
16. pThis->m_hWnd = NULL;
17. pThis->OnFinalMessage(hWnd);
18. return lRes;
19. }
20. }
21. if( pThis != NULL ) {
22. return pThis->HandleMessage(uMsg, wParam, lParam);
23. }
24. else {
25. return ::DefWindowProc(hWnd, uMsg, wParam, lParam);
26. }
27.}
此過程很簡單,對窗口創建過程中的第一個消息WM_NCCREATE進行處理,對其窗口attach窗口對象地址。HandleMessage是一個虛函數,需要我們進行重載,此接口很重要,相當於MFC中的具體的一個窗口類的消息映射表,win32中的具體的窗口過程。
下面的代碼展示了HandleMessage的典型實現:
[cpp] view plain copy
01.LRESULT HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
02. {
03. if( uMsg == WM_CREATE ) {
04. m_pm.Init(m_hWnd);
05. CControlUI *pButton = new CButtonUI;
06. pButton->SetName(_T("closebtn"));
07. pButton->SetBkColor(0xFFFF0000);
08. m_pm.AttachDialog(pButton);
09. m_pm.AddNotifier(this);
10. return 0;
11. }
12. else if( uMsg == WM_DESTROY ) {
13. ::PostQuitMessage(0);
14. }
15. else if( uMsg == WM_NCACTIVATE ) {
16. if( !::IsIconic(m_hWnd) ) {
17. return (wParam == 0) ? TRUE : FALSE;
18. }
19. }
20. else if( uMsg == WM_NCCALCSIZE ) {
21. return 0;
22. }
23. else if( uMsg == WM_NCPAINT ) {
24. return 0;
25. }
26.
27. LRESULT lRes = 0;
28. if( m_pm.MessageHandler(uMsg, wParam, lParam, lRes) ) return lRes;
29. return CWindowWnd::HandleMessage(uMsg, wParam, lParam);
30. }
至此,消息路由大體就說完了,有興趣的可以畫個圖,一目瞭然。
本文若有不對之處,敬請指出。
我們知道win32窗口程序的基本流程:
註冊窗口類 -> 創建窗口 —> 顯示窗口 -> 消息循環 -> 消息流轉
基於這個路線,我們來探索下duilib庫的實現。
毋庸置疑,先看一例測試程序中的WinMain函數:
- CFrameWindowWnd* pFrame = new CFrameWindowWnd();
- if( pFrame == NULL ) return 0;
- pFrame->Create(NULL, _T("測試"), UI_WNDSTYLE_FRAME, WS_EX_WINDOWEDGE);
- pFrame->ShowWindow(true);
- CPaintManagerUI::MessageLoop();
CFrameWindowWnd* pFrame = new CFrameWindowWnd();
if( pFrame == NULL ) return 0;
pFrame->Create(NULL, _T("測試"), UI_WNDSTYLE_FRAME, WS_EX_WINDOWEDGE);
pFrame->ShowWindow(true);
CPaintManagerUI::MessageLoop();
可以確定註冊窗口類和創建窗口都在CFrameWindowWnd::Create中進行。其中CFrameWindowWnd的一個基類是CWindowWnd,進入到該類Create方法中:
- HWND CWindowWnd::Create(HWND hwndParent, LPCTSTR pstrName, DWORD dwStyle, DWORD dwExStyle, int x, int y, int cx, int cy, HMENU hMenu)
- {
- if( GetSuperClassName() != NULL && !RegisterSuperclass() ) return NULL;
- if( GetSuperClassName() == NULL && !RegisterWindowClass() ) return NULL;
- m_hWnd = ::CreateWindowEx(dwExStyle, GetWindowClassName(), pstrName, dwStyle, x, y, cx, cy, hwndParent, hMenu, CPaintManagerUI::GetInstance(), this);
- ASSERT(m_hWnd!=NULL);
- return m_hWnd;
- }
HWND CWindowWnd::Create(HWND hwndParent, LPCTSTR pstrName, DWORD dwStyle, DWORD dwExStyle, int x, int y, int cx, int cy, HMENU hMenu)
{
if( GetSuperClassName() != NULL && !RegisterSuperclass() ) return NULL;
if( GetSuperClassName() == NULL && !RegisterWindowClass() ) return NULL;
m_hWnd = ::CreateWindowEx(dwExStyle, GetWindowClassName(), pstrName, dwStyle, x, y, cx, cy, hwndParent, hMenu, CPaintManagerUI::GetInstance(), this);
ASSERT(m_hWnd!=NULL);
return m_hWnd;
}
其中GetSuperClassName爲虛函數,用於指定要子類化的窗口類。關於窗口子類化的處理此處不予關注。
如果不需要子類化,則調用RegisterWindowClass進行窗口類註冊。進入該方法內,可以發現註冊窗的口過程是CWindowWnd::__WndProc;
註冊之後,調用API CreateWindowEx創建窗口。
創建窗口後,就該最關鍵的消息循環和消息路由了,here we go!
首先看看消息循環的處理CPaintManagerUI::MessageLoop:
- void CPaintManagerUI::MessageLoop()
- {
- MSG msg = { 0 };
- while( ::GetMessage(&msg, NULL, 0, 0) ) {
- if( !CPaintManagerUI::TranslateMessage(&msg) ) {
- ::TranslateMessage(&msg);
- ::DispatchMessage(&msg);
- }
- }
- }
void CPaintManagerUI::MessageLoop()
{
MSG msg = { 0 };
while( ::GetMessage(&msg, NULL, 0, 0) ) {
if( !CPaintManagerUI::TranslateMessage(&msg) ) {
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
}
}
可以看出,任何消息都會經過CPaintManagerUI::TranslateMessage的過濾,如果該方法沒有處理消息,纔將消息路由給窗口過程。相當於MFC中的PreTranslateMessage。
然後我們看下CPaintManagerUI::TranslateMessage的實現:
- bool CPaintManagerUI::TranslateMessage(const LPMSG pMsg)
- {
- // Pretranslate Message takes care of system-wide messages, such as
- // tabbing and shortcut key-combos. We'll look for all messages for
- // each window and any child control attached.
- HWND hwndParent = ::GetParent(pMsg->hwnd);
- UINT uStyle = GetWindowStyle(pMsg->hwnd);
- LRESULT lRes = 0;
- for( int i = 0; i < m_aPreMessages.GetSize(); i++ ) {
- CPaintManagerUI* pT = static_cast<CPaintManagerUI*>(m_aPreMessages[i]);
- if( pMsg->hwnd == pT->GetPaintWindow()
- || (hwndParent == pT->GetPaintWindow() && ((uStyle & WS_CHILD) != 0)) )
- {
- if( pT->PreMessageHandler(pMsg->message, pMsg->wParam, pMsg->lParam, lRes) ) return true;
- }
- }
- return false;
- }
bool CPaintManagerUI::TranslateMessage(const LPMSG pMsg)
{
// Pretranslate Message takes care of system-wide messages, such as
// tabbing and shortcut key-combos. We'll look for all messages for
// each window and any child control attached.
HWND hwndParent = ::GetParent(pMsg->hwnd);
UINT uStyle = GetWindowStyle(pMsg->hwnd);
LRESULT lRes = 0;
for( int i = 0; i < m_aPreMessages.GetSize(); i++ ) {
CPaintManagerUI* pT = static_cast<CPaintManagerUI*>(m_aPreMessages[i]);
if( pMsg->hwnd == pT->GetPaintWindow()
|| (hwndParent == pT->GetPaintWindow() && ((uStyle & WS_CHILD) != 0)) )
{
if( pT->PreMessageHandler(pMsg->message, pMsg->wParam, pMsg->lParam, lRes) ) return true;
}
}
return false;
}
m_aPreMessages 的定義爲:static CStdPtrArray m_aPreMessages; 當創建一個主窗口時,m_aPreMessages一般會有插入動作,因此,此數組是所有相關窗口attach的CPaintManagerUI對象地址的集合,處理的是整個程序的全局的消息。當msg消息路由至此處時,如果該窗口是子窗口或者消息窗口本身,就調用PreMessageHandler處理,如果仍未得到處理,則返回false,傳遞給窗口註冊的窗口消息處理。
接下來看看CPaintManagerUI::PreMessageHandler的實現:
- bool CPaintManagerUI::PreMessageHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& /*lRes*/)
- {
- for( int i = 0; i < m_aPreMessageFilters.GetSize(); i++ )
- {
- bool bHandled = false;
- LRESULT lResult = static_cast<IMessageFilterUI*>(m_aPreMessageFilters[i])->MessageHandler(uMsg, wParam, lParam, bHandled);
- if( bHandled ) {
- return true;
- }
- }
- switch( uMsg ) {
- case WM_KEYDOWN:
- {
- // Tabbing between controls
- if( wParam == VK_TAB ) {
- if( m_pFocus && m_pFocus->IsVisible() && m_pFocus->IsEnabled() && _tcsstr(m_pFocus->GetClass(), _T("RichEditUI")) != NULL ) {
- if( static_cast<CRichEditUI*>(m_pFocus)->IsWantTab() ) return false;
- }
- SetNextTabControl(::GetKeyState(VK_SHIFT) >= 0);
- return true;
- }
- }
- break;
- case WM_SYSCHAR:
- {
- // Handle ALT-shortcut key-combinations
- FINDSHORTCUT fs = { 0 };
- fs.ch = toupper((int)wParam);
- CControlUI* pControl = m_pRoot->FindControl(__FindControlFromShortcut, &fs, UIFIND_ENABLED | UIFIND_ME_FIRST | UIFIND_TOP_FIRST);
- if( pControl != NULL ) {
- pControl->SetFocus();
- pControl->Activate();
- return true;
- }
- }
- break;
- case WM_SYSKEYDOWN:
- {
- if( m_pFocus != NULL ) {
- TEventUI event = { 0 };
- event.Type = UIEVENT_SYSKEY;
- event.chKey = (TCHAR)wParam;
- event.ptMouse = m_ptLastMousePos;
- event.wKeyState = MapKeyState();
- event.dwTimestamp = ::GetTickCount();
- m_pFocus->Event(event);
- }
- }
- break;
- }
- return false;
- }
bool CPaintManagerUI::PreMessageHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& /*lRes*/)
{
for( int i = 0; i < m_aPreMessageFilters.GetSize(); i++ )
{
bool bHandled = false;
LRESULT lResult = static_cast<IMessageFilterUI*>(m_aPreMessageFilters[i])->MessageHandler(uMsg, wParam, lParam, bHandled);
if( bHandled ) {
return true;
}
}
switch( uMsg ) {
case WM_KEYDOWN:
{
// Tabbing between controls
if( wParam == VK_TAB ) {
if( m_pFocus && m_pFocus->IsVisible() && m_pFocus->IsEnabled() && _tcsstr(m_pFocus->GetClass(), _T("RichEditUI")) != NULL ) {
if( static_cast<CRichEditUI*>(m_pFocus)->IsWantTab() ) return false;
}
SetNextTabControl(::GetKeyState(VK_SHIFT) >= 0);
return true;
}
}
break;
case WM_SYSCHAR:
{
// Handle ALT-shortcut key-combinations
FINDSHORTCUT fs = { 0 };
fs.ch = toupper((int)wParam);
CControlUI* pControl = m_pRoot->FindControl(__FindControlFromShortcut, &fs, UIFIND_ENABLED | UIFIND_ME_FIRST | UIFIND_TOP_FIRST);
if( pControl != NULL ) {
pControl->SetFocus();
pControl->Activate();
return true;
}
}
break;
case WM_SYSKEYDOWN:
{
if( m_pFocus != NULL ) {
TEventUI event = { 0 };
event.Type = UIEVENT_SYSKEY;
event.chKey = (TCHAR)wParam;
event.ptMouse = m_ptLastMousePos;
event.wKeyState = MapKeyState();
event.dwTimestamp = ::GetTickCount();
m_pFocus->Event(event);
}
}
break;
}
return false;
}
這裏又新增了一個對象屬性:m_aPreMessageFilters,是一個窗口類(派生CWindowWnd)對象的集合。同時該對象的類必須是IMessageFilterUI和CWindowWnd的子類。通過這個集合,app將消息推送到每一個需要預處理所關心的消息的窗口,即調用MessageHandler,此方法是我們要重載的重要方法之一,用於對消息傳遞給窗口過程之前的預處理。接下來的是duilib提供的預處理,switch塊處理的是全局級消息,對其進行預處理,包括tab處理,alt組合鍵和系統按鍵消息。
必須要注意,CPaintManagerUI::MessageHandler爲我們提供了多數消息的默認實現。
至此,消息的預處理階段完成,回到CPaintManagerUI::MessageLoop,未處理的消息將傳遞給窗口過程:
- LRESULT CALLBACK CWindowWnd::__WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
- {
- CWindowWnd* pThis = NULL;
- if( uMsg == WM_NCCREATE ) {
- LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
- pThis = static_cast<CWindowWnd*>(lpcs->lpCreateParams);
- pThis->m_hWnd = hWnd;
- ::SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LPARAM>(pThis));
- }
- else {
- pThis = reinterpret_cast<CWindowWnd*>(::GetWindowLongPtr(hWnd, GWLP_USERDATA));
- if( uMsg == WM_NCDESTROY && pThis != NULL ) {
- LRESULT lRes = ::CallWindowProc(pThis->m_OldWndProc, hWnd, uMsg, wParam, lParam);
- ::SetWindowLongPtr(pThis->m_hWnd, GWLP_USERDATA, 0L);
- if( pThis->m_bSubclassed ) pThis->Unsubclass();
- pThis->m_hWnd = NULL;
- pThis->OnFinalMessage(hWnd);
- return lRes;
- }
- }
- if( pThis != NULL ) {
- return pThis->HandleMessage(uMsg, wParam, lParam);
- }
- else {
- return ::DefWindowProc(hWnd, uMsg, wParam, lParam);
- }
- }
LRESULT CALLBACK CWindowWnd::__WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
CWindowWnd* pThis = NULL;
if( uMsg == WM_NCCREATE ) {
LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
pThis = static_cast<CWindowWnd*>(lpcs->lpCreateParams);
pThis->m_hWnd = hWnd;
::SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LPARAM>(pThis));
}
else {
pThis = reinterpret_cast<CWindowWnd*>(::GetWindowLongPtr(hWnd, GWLP_USERDATA));
if( uMsg == WM_NCDESTROY && pThis != NULL ) {
LRESULT lRes = ::CallWindowProc(pThis->m_OldWndProc, hWnd, uMsg, wParam, lParam);
::SetWindowLongPtr(pThis->m_hWnd, GWLP_USERDATA, 0L);
if( pThis->m_bSubclassed ) pThis->Unsubclass();
pThis->m_hWnd = NULL;
pThis->OnFinalMessage(hWnd);
return lRes;
}
}
if( pThis != NULL ) {
return pThis->HandleMessage(uMsg, wParam, lParam);
}
else {
return ::DefWindowProc(hWnd, uMsg, wParam, lParam);
}
}
此過程很簡單,對窗口創建過程中的第一個消息WM_NCCREATE進行處理,對其窗口attach窗口對象地址。HandleMessage是一個虛函數,需要我們進行重載,此接口很重要,相當於MFC中的具體的一個窗口類的消息映射表,win32中的具體的窗口過程。
下面的代碼展示了HandleMessage的典型實現:
- LRESULT HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
- {
- if( uMsg == WM_CREATE ) {
- m_pm.Init(m_hWnd);
- CControlUI *pButton = new CButtonUI;
- pButton->SetName(_T("closebtn"));
- pButton->SetBkColor(0xFFFF0000);
- m_pm.AttachDialog(pButton);
- m_pm.AddNotifier(this);
- return 0;
- }
- else if( uMsg == WM_DESTROY ) {
- ::PostQuitMessage(0);
- }
- else if( uMsg == WM_NCACTIVATE ) {
- if( !::IsIconic(m_hWnd) ) {
- return (wParam == 0) ? TRUE : FALSE;
- }
- }
- else if( uMsg == WM_NCCALCSIZE ) {
- return 0;
- }
- else if( uMsg == WM_NCPAINT ) {
- return 0;
- }
- LRESULT lRes = 0;
- if( m_pm.MessageHandler(uMsg, wParam, lParam, lRes) ) return lRes;
- return CWindowWnd::HandleMessage(uMsg, wParam, lParam);
- }
LRESULT HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if( uMsg == WM_CREATE ) {
m_pm.Init(m_hWnd);
CControlUI *pButton = new CButtonUI;
pButton->SetName(_T("closebtn"));
pButton->SetBkColor(0xFFFF0000);
m_pm.AttachDialog(pButton);
m_pm.AddNotifier(this);
return 0;
}
else if( uMsg == WM_DESTROY ) {
::PostQuitMessage(0);
}
else if( uMsg == WM_NCACTIVATE ) {
if( !::IsIconic(m_hWnd) ) {
return (wParam == 0) ? TRUE : FALSE;
}
}
else if( uMsg == WM_NCCALCSIZE ) {
return 0;
}
else if( uMsg == WM_NCPAINT ) {
return 0;
}
LRESULT lRes = 0;
if( m_pm.MessageHandler(uMsg, wParam, lParam, lRes) ) return lRes;
return CWindowWnd::HandleMessage(uMsg, wParam, lParam);
}
至此,消息路由大體就說完了,有興趣的可以畫個圖,一目瞭然。